michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "WebGLContext.h"
michael@0: #include "WebGLContextUtils.h"
michael@0: #include "WebGLBuffer.h"
michael@0: #include "WebGLVertexAttribData.h"
michael@0: #include "WebGLShader.h"
michael@0: #include "WebGLProgram.h"
michael@0: #include "WebGLUniformLocation.h"
michael@0: #include "WebGLFramebuffer.h"
michael@0: #include "WebGLRenderbuffer.h"
michael@0: #include "WebGLShaderPrecisionFormat.h"
michael@0: #include "WebGLTexture.h"
michael@0: #include "WebGLExtensions.h"
michael@0: #include "WebGLVertexArray.h"
michael@0: 
michael@0: #include "nsString.h"
michael@0: #include "nsDebug.h"
michael@0: 
michael@0: #include "gfxContext.h"
michael@0: #include "gfxPlatform.h"
michael@0: #include "GLContext.h"
michael@0: 
michael@0: #include "nsContentUtils.h"
michael@0: #include "nsError.h"
michael@0: #include "nsLayoutUtils.h"
michael@0: 
michael@0: #include "CanvasUtils.h"
michael@0: #include "gfxUtils.h"
michael@0: 
michael@0: #include "jsfriendapi.h"
michael@0: 
michael@0: #include "WebGLTexelConversions.h"
michael@0: #include "WebGLValidateStrings.h"
michael@0: #include <algorithm>
michael@0: 
michael@0: // needed to check if current OS is lower than 10.7
michael@0: #if defined(MOZ_WIDGET_COCOA)
michael@0: #include "nsCocoaFeatures.h"
michael@0: #endif
michael@0: 
michael@0: #include "mozilla/dom/BindingUtils.h"
michael@0: #include "mozilla/dom/ImageData.h"
michael@0: #include "mozilla/dom/ToJSValue.h"
michael@0: #include "mozilla/Endian.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::dom;
michael@0: using namespace mozilla::gl;
michael@0: using namespace mozilla::gfx;
michael@0: 
michael@0: static bool BaseTypeAndSizeFromUniformType(GLenum uType, GLenum *baseType, GLint *unitSize);
michael@0: 
michael@0: const WebGLRectangleObject*
michael@0: WebGLContext::CurValidFBRectObject() const
michael@0: {
michael@0:     const WebGLRectangleObject* rect = nullptr;
michael@0: 
michael@0:     if (mBoundFramebuffer) {
michael@0:         // We don't really need to ask the driver.
michael@0:         // Use 'precheck' to just check that our internal state looks good.
michael@0:         GLenum precheckStatus = mBoundFramebuffer->PrecheckFramebufferStatus();
michael@0:         if (precheckStatus == LOCAL_GL_FRAMEBUFFER_COMPLETE)
michael@0:             rect = &mBoundFramebuffer->RectangleObject();
michael@0:     } else {
michael@0:         rect = static_cast<const WebGLRectangleObject*>(this);
michael@0:     }
michael@0: 
michael@0:     return rect;
michael@0: }
michael@0: 
michael@0: //
michael@0: //  WebGL API
michael@0: //
michael@0: 
michael@0: void
michael@0: WebGLContext::ActiveTexture(GLenum texture)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (texture < LOCAL_GL_TEXTURE0 ||
michael@0:         texture >= LOCAL_GL_TEXTURE0 + uint32_t(mGLMaxTextureUnits))
michael@0:     {
michael@0:         return ErrorInvalidEnum(
michael@0:             "ActiveTexture: texture unit %d out of range. "
michael@0:             "Accepted values range from TEXTURE0 to TEXTURE0 + %d. "
michael@0:             "Notice that TEXTURE0 != 0.",
michael@0:             texture, mGLMaxTextureUnits);
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     mActiveTexture = texture - LOCAL_GL_TEXTURE0;
michael@0:     gl->fActiveTexture(texture);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::AttachShader(WebGLProgram *program, WebGLShader *shader)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObject("attachShader: program", program) ||
michael@0:         !ValidateObject("attachShader: shader", shader))
michael@0:         return;
michael@0: 
michael@0:     // Per GLSL ES 2.0, we can only have one of each type of shader
michael@0:     // attached.  This renders the next test somewhat moot, but we'll
michael@0:     // leave it for when we support more than one shader of each type.
michael@0:     if (program->HasAttachedShaderOfType(shader->ShaderType()))
michael@0:         return ErrorInvalidOperation("attachShader: only one of each type of shader may be attached to a program");
michael@0: 
michael@0:     if (!program->AttachShader(shader))
michael@0:         return ErrorInvalidOperation("attachShader: shader is already attached");
michael@0: }
michael@0: 
michael@0: 
michael@0: void
michael@0: WebGLContext::BindAttribLocation(WebGLProgram *prog, GLuint location,
michael@0:                                  const nsAString& name)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObject("bindAttribLocation: program", prog))
michael@0:         return;
michael@0: 
michael@0:     GLuint progname = prog->GLName();
michael@0: 
michael@0:     if (!ValidateGLSLVariableName(name, "bindAttribLocation"))
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateAttribIndex(location, "bindAttribLocation"))
michael@0:         return;
michael@0: 
michael@0:     NS_LossyConvertUTF16toASCII cname(name);
michael@0:     nsCString mappedName;
michael@0:     prog->MapIdentifier(cname, &mappedName);
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fBindAttribLocation(progname, location, mappedName.get());
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::BindFramebuffer(GLenum target, WebGLFramebuffer *wfb)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (target != LOCAL_GL_FRAMEBUFFER)
michael@0:         return ErrorInvalidEnum("bindFramebuffer: target must be GL_FRAMEBUFFER");
michael@0: 
michael@0:     if (!ValidateObjectAllowDeletedOrNull("bindFramebuffer", wfb))
michael@0:         return;
michael@0: 
michael@0:     // silently ignore a deleted frame buffer
michael@0:     if (wfb && wfb->IsDeleted())
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     if (!wfb) {
michael@0:         gl->fBindFramebuffer(target, 0);
michael@0:     } else {
michael@0:         GLuint framebuffername = wfb->GLName();
michael@0:         gl->fBindFramebuffer(target, framebuffername);
michael@0:         wfb->SetHasEverBeenBound(true);
michael@0:     }
michael@0: 
michael@0:     mBoundFramebuffer = wfb;
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::BindRenderbuffer(GLenum target, WebGLRenderbuffer *wrb)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (target != LOCAL_GL_RENDERBUFFER)
michael@0:         return ErrorInvalidEnumInfo("bindRenderbuffer: target", target);
michael@0: 
michael@0:     if (!ValidateObjectAllowDeletedOrNull("bindRenderbuffer", wrb))
michael@0:         return;
michael@0: 
michael@0:     // silently ignore a deleted buffer
michael@0:     if (wrb && wrb->IsDeleted())
michael@0:         return;
michael@0: 
michael@0:     if (wrb)
michael@0:         wrb->SetHasEverBeenBound(true);
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     // Sometimes we emulate renderbuffers (depth-stencil emu), so there's not
michael@0:     // always a 1-1 mapping from `wrb` to GL name. Just have `wrb` handle it.
michael@0:     if (wrb) {
michael@0:         wrb->BindRenderbuffer();
michael@0:     } else {
michael@0:         gl->fBindRenderbuffer(target, 0);
michael@0:     }
michael@0: 
michael@0:     mBoundRenderbuffer = wrb;
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::BindTexture(GLenum target, WebGLTexture *newTex)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:      if (!ValidateObjectAllowDeletedOrNull("bindTexture", newTex))
michael@0:         return;
michael@0: 
michael@0:     // silently ignore a deleted texture
michael@0:     if (newTex && newTex->IsDeleted())
michael@0:         return;
michael@0: 
michael@0:     WebGLRefPtr<WebGLTexture>* currentTexPtr = nullptr;
michael@0: 
michael@0:     if (target == LOCAL_GL_TEXTURE_2D) {
michael@0:         currentTexPtr = &mBound2DTextures[mActiveTexture];
michael@0:     } else if (target == LOCAL_GL_TEXTURE_CUBE_MAP) {
michael@0:         currentTexPtr = &mBoundCubeMapTextures[mActiveTexture];
michael@0:     } else {
michael@0:         return ErrorInvalidEnumInfo("bindTexture: target", target);
michael@0:     }
michael@0: 
michael@0:     WebGLTextureFakeBlackStatus currentTexFakeBlackStatus = WebGLTextureFakeBlackStatus::NotNeeded;
michael@0:     if (*currentTexPtr) {
michael@0:         currentTexFakeBlackStatus = (*currentTexPtr)->ResolvedFakeBlackStatus();
michael@0:     }
michael@0:     WebGLTextureFakeBlackStatus newTexFakeBlackStatus = WebGLTextureFakeBlackStatus::NotNeeded;
michael@0:     if (newTex) {
michael@0:         newTexFakeBlackStatus = newTex->ResolvedFakeBlackStatus();
michael@0:     }
michael@0: 
michael@0:     *currentTexPtr = newTex;
michael@0: 
michael@0:     if (currentTexFakeBlackStatus != newTexFakeBlackStatus) {
michael@0:         SetFakeBlackStatus(WebGLContextFakeBlackStatus::Unknown);
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     if (newTex)
michael@0:         newTex->Bind(target);
michael@0:     else
michael@0:         gl->fBindTexture(target, 0 /* == texturename */);
michael@0: }
michael@0: 
michael@0: void WebGLContext::BlendEquation(GLenum mode)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateBlendEquationEnum(mode, "blendEquation: mode"))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fBlendEquation(mode);
michael@0: }
michael@0: 
michael@0: void WebGLContext::BlendEquationSeparate(GLenum modeRGB, GLenum modeAlpha)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateBlendEquationEnum(modeRGB, "blendEquationSeparate: modeRGB") ||
michael@0:         !ValidateBlendEquationEnum(modeAlpha, "blendEquationSeparate: modeAlpha"))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fBlendEquationSeparate(modeRGB, modeAlpha);
michael@0: }
michael@0: 
michael@0: void WebGLContext::BlendFunc(GLenum sfactor, GLenum dfactor)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateBlendFuncSrcEnum(sfactor, "blendFunc: sfactor") ||
michael@0:         !ValidateBlendFuncDstEnum(dfactor, "blendFunc: dfactor"))
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateBlendFuncEnumsCompatibility(sfactor, dfactor, "blendFuncSeparate: srcRGB and dstRGB"))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fBlendFunc(sfactor, dfactor);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::BlendFuncSeparate(GLenum srcRGB, GLenum dstRGB,
michael@0:                                 GLenum srcAlpha, GLenum dstAlpha)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateBlendFuncSrcEnum(srcRGB, "blendFuncSeparate: srcRGB") ||
michael@0:         !ValidateBlendFuncSrcEnum(srcAlpha, "blendFuncSeparate: srcAlpha") ||
michael@0:         !ValidateBlendFuncDstEnum(dstRGB, "blendFuncSeparate: dstRGB") ||
michael@0:         !ValidateBlendFuncDstEnum(dstAlpha, "blendFuncSeparate: dstAlpha"))
michael@0:         return;
michael@0: 
michael@0:     // note that we only check compatibity for the RGB enums, no need to for the Alpha enums, see
michael@0:     // "Section 6.8 forgetting to mention alpha factors?" thread on the public_webgl mailing list
michael@0:     if (!ValidateBlendFuncEnumsCompatibility(srcRGB, dstRGB, "blendFuncSeparate: srcRGB and dstRGB"))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fBlendFuncSeparate(srcRGB, dstRGB, srcAlpha, dstAlpha);
michael@0: }
michael@0: 
michael@0: GLenum
michael@0: WebGLContext::CheckFramebufferStatus(GLenum target)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return LOCAL_GL_FRAMEBUFFER_UNSUPPORTED;
michael@0: 
michael@0:     if (target != LOCAL_GL_FRAMEBUFFER) {
michael@0:         ErrorInvalidEnum("checkFramebufferStatus: target must be FRAMEBUFFER");
michael@0:         return 0;
michael@0:     }
michael@0: 
michael@0:     if (!mBoundFramebuffer)
michael@0:         return LOCAL_GL_FRAMEBUFFER_COMPLETE;
michael@0: 
michael@0:     return mBoundFramebuffer->CheckFramebufferStatus();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::CopyTexSubImage2D_base(GLenum target,
michael@0:                                      GLint level,
michael@0:                                      GLenum internalformat,
michael@0:                                      GLint xoffset,
michael@0:                                      GLint yoffset,
michael@0:                                      GLint x,
michael@0:                                      GLint y,
michael@0:                                      GLsizei width,
michael@0:                                      GLsizei height,
michael@0:                                      bool sub)
michael@0: {
michael@0:     const WebGLRectangleObject* framebufferRect = CurValidFBRectObject();
michael@0:     GLsizei framebufferWidth = framebufferRect ? framebufferRect->Width() : 0;
michael@0:     GLsizei framebufferHeight = framebufferRect ? framebufferRect->Height() : 0;
michael@0: 
michael@0:     const char* info = sub ? "copyTexSubImage2D" : "copyTexImage2D";
michael@0:     WebGLTexImageFunc func = sub ? WebGLTexImageFunc::CopyTexSubImage : WebGLTexImageFunc::CopyTexImage;
michael@0: 
michael@0:     // TODO: This changes with color_buffer_float. Reassess when the
michael@0:     // patch lands.
michael@0:     if (!ValidateTexImage(2, target, level, internalformat,
michael@0:                           xoffset, yoffset, 0,
michael@0:                           width, height, 0,
michael@0:                           0, internalformat, LOCAL_GL_UNSIGNED_BYTE,
michael@0:                           func))
michael@0:     {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     WebGLTexture *tex = activeBoundTextureForTarget(target);
michael@0: 
michael@0:     if (!tex)
michael@0:         return ErrorInvalidOperation("%s: no texture is bound to this target");
michael@0: 
michael@0:     if (CanvasUtils::CheckSaneSubrectSize(x, y, width, height, framebufferWidth, framebufferHeight)) {
michael@0:         if (sub)
michael@0:             gl->fCopyTexSubImage2D(target, level, xoffset, yoffset, x, y, width, height);
michael@0:         else
michael@0:             gl->fCopyTexImage2D(target, level, internalformat, x, y, width, height, 0);
michael@0:     } else {
michael@0: 
michael@0:         // the rect doesn't fit in the framebuffer
michael@0: 
michael@0:         /*** first, we initialize the texture as black ***/
michael@0: 
michael@0:         // first, compute the size of the buffer we should allocate to initialize the texture as black
michael@0: 
michael@0:         if (!ValidateTexInputData(LOCAL_GL_UNSIGNED_BYTE, -1, func))
michael@0:             return;
michael@0: 
michael@0:         uint32_t texelSize = GetBitsPerTexel(internalformat, LOCAL_GL_UNSIGNED_BYTE) / 8;
michael@0: 
michael@0:         CheckedUint32 checked_neededByteLength =
michael@0:             GetImageSize(height, width, texelSize, mPixelStoreUnpackAlignment);
michael@0: 
michael@0:         if (!checked_neededByteLength.isValid())
michael@0:             return ErrorInvalidOperation("%s: integer overflow computing the needed buffer size", info);
michael@0: 
michael@0:         uint32_t bytesNeeded = checked_neededByteLength.value();
michael@0: 
michael@0:         // now that the size is known, create the buffer
michael@0: 
michael@0:         // We need some zero pages, because GL doesn't guarantee the
michael@0:         // contents of a texture allocated with nullptr data.
michael@0:         // Hopefully calloc will just mmap zero pages here.
michael@0:         void* tempZeroData = calloc(1, bytesNeeded);
michael@0:         if (!tempZeroData)
michael@0:             return ErrorOutOfMemory("%s: could not allocate %d bytes (for zero fill)", info, bytesNeeded);
michael@0: 
michael@0:         // now initialize the texture as black
michael@0: 
michael@0:         if (sub)
michael@0:             gl->fTexSubImage2D(target, level, 0, 0, width, height,
michael@0:                                internalformat, LOCAL_GL_UNSIGNED_BYTE, tempZeroData);
michael@0:         else
michael@0:             gl->fTexImage2D(target, level, internalformat, width, height,
michael@0:                             0, internalformat, LOCAL_GL_UNSIGNED_BYTE, tempZeroData);
michael@0:         free(tempZeroData);
michael@0: 
michael@0:         // if we are completely outside of the framebuffer, we can exit now with our black texture
michael@0:         if (   x >= framebufferWidth
michael@0:             || x+width <= 0
michael@0:             || y >= framebufferHeight
michael@0:             || y+height <= 0)
michael@0:         {
michael@0:             // we are completely outside of range, can exit now with buffer filled with zeros
michael@0:             return DummyFramebufferOperation(info);
michael@0:         }
michael@0: 
michael@0:         GLint   actual_x             = clamped(x, 0, framebufferWidth);
michael@0:         GLint   actual_x_plus_width  = clamped(x + width, 0, framebufferWidth);
michael@0:         GLsizei actual_width   = actual_x_plus_width  - actual_x;
michael@0:         GLint   actual_xoffset = xoffset + actual_x - x;
michael@0: 
michael@0:         GLint   actual_y             = clamped(y, 0, framebufferHeight);
michael@0:         GLint   actual_y_plus_height = clamped(y + height, 0, framebufferHeight);
michael@0:         GLsizei actual_height  = actual_y_plus_height - actual_y;
michael@0:         GLint   actual_yoffset = yoffset + actual_y - y;
michael@0: 
michael@0:         gl->fCopyTexSubImage2D(target, level, actual_xoffset, actual_yoffset, actual_x, actual_y, actual_width, actual_height);
michael@0:     }
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::CopyTexImage2D(GLenum target,
michael@0:                              GLint level,
michael@0:                              GLenum internalformat,
michael@0:                              GLint x,
michael@0:                              GLint y,
michael@0:                              GLsizei width,
michael@0:                              GLsizei height,
michael@0:                              GLint border)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     // copyTexImage2D only generates textures with type = UNSIGNED_BYTE
michael@0:     const WebGLTexImageFunc func = WebGLTexImageFunc::CopyTexImage;
michael@0:     const GLenum format = internalformat; // WebGL/ES Format
michael@0:     const GLenum type = LOCAL_GL_UNSIGNED_BYTE; // WebGL/ES Format
michael@0: 
michael@0:     if (!ValidateTexImage(2, target, level, format,
michael@0:                           0, 0, 0,
michael@0:                           width, height, 0,
michael@0:                           border, format, type,
michael@0:                           func))
michael@0:     {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (mBoundFramebuffer) {
michael@0:         if (!mBoundFramebuffer->CheckAndInitializeAttachments())
michael@0:             return ErrorInvalidFramebufferOperation("copyTexImage2D: incomplete framebuffer");
michael@0: 
michael@0:         GLenum readPlaneBits = LOCAL_GL_COLOR_BUFFER_BIT;
michael@0:         if (!mBoundFramebuffer->HasCompletePlanes(readPlaneBits)) {
michael@0:             return ErrorInvalidOperation("copyTexImage2D: Read source attachment doesn't have the"
michael@0:                                          " correct color/depth/stencil type.");
michael@0:         }
michael@0:     } else {
michael@0:       ClearBackbufferIfNeeded();
michael@0:     }
michael@0: 
michael@0:     bool texFormatRequiresAlpha = format == LOCAL_GL_RGBA ||
michael@0:                                   format == LOCAL_GL_ALPHA ||
michael@0:                                   format == LOCAL_GL_LUMINANCE_ALPHA;
michael@0:     bool fboFormatHasAlpha = mBoundFramebuffer ? mBoundFramebuffer->ColorAttachment(0).HasAlpha()
michael@0:                                                : bool(gl->GetPixelFormat().alpha > 0);
michael@0:     if (texFormatRequiresAlpha && !fboFormatHasAlpha)
michael@0:         return ErrorInvalidOperation("copyTexImage2D: texture format requires an alpha channel "
michael@0:                                      "but the framebuffer doesn't have one");
michael@0: 
michael@0:     // check if the memory size of this texture may change with this call
michael@0:     bool sizeMayChange = true;
michael@0:     WebGLTexture* tex = activeBoundTextureForTarget(target);
michael@0:     if (tex->HasImageInfoAt(target, level)) {
michael@0:         const WebGLTexture::ImageInfo& imageInfo = tex->ImageInfoAt(target, level);
michael@0: 
michael@0:         sizeMayChange = width != imageInfo.Width() ||
michael@0:                         height != imageInfo.Height() ||
michael@0:                         format != imageInfo.WebGLFormat() ||
michael@0:                         type != imageInfo.WebGLType();
michael@0:     }
michael@0: 
michael@0:     if (sizeMayChange)
michael@0:         GetAndFlushUnderlyingGLErrors();
michael@0: 
michael@0:     CopyTexSubImage2D_base(target, level, format, 0, 0, x, y, width, height, false);
michael@0: 
michael@0:     if (sizeMayChange) {
michael@0:         GLenum error = GetAndFlushUnderlyingGLErrors();
michael@0:         if (error) {
michael@0:             GenerateWarning("copyTexImage2D generated error %s", ErrorName(error));
michael@0:             return;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     tex->SetImageInfo(target, level, width, height, format, type,
michael@0:                       WebGLImageDataStatus::InitializedImageData);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::CopyTexSubImage2D(GLenum target,
michael@0:                                 GLint level,
michael@0:                                 GLint xoffset,
michael@0:                                 GLint yoffset,
michael@0:                                 GLint x,
michael@0:                                 GLint y,
michael@0:                                 GLsizei width,
michael@0:                                 GLsizei height)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     switch (target) {
michael@0:         case LOCAL_GL_TEXTURE_2D:
michael@0:         case LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X:
michael@0:         case LOCAL_GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
michael@0:         case LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
michael@0:         case LOCAL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
michael@0:         case LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
michael@0:         case LOCAL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
michael@0:             break;
michael@0:         default:
michael@0:             return ErrorInvalidEnumInfo("copyTexSubImage2D: target", target);
michael@0:     }
michael@0: 
michael@0:     if (level < 0)
michael@0:         return ErrorInvalidValue("copyTexSubImage2D: level may not be negative");
michael@0: 
michael@0:     GLsizei maxTextureSize = MaxTextureSizeForTarget(target);
michael@0:     if (!(maxTextureSize >> level))
michael@0:         return ErrorInvalidValue("copyTexSubImage2D: 2^level exceeds maximum texture size");
michael@0: 
michael@0:     if (width < 0 || height < 0)
michael@0:         return ErrorInvalidValue("copyTexSubImage2D: width and height may not be negative");
michael@0: 
michael@0:     if (xoffset < 0 || yoffset < 0)
michael@0:         return ErrorInvalidValue("copyTexSubImage2D: xoffset and yoffset may not be negative");
michael@0: 
michael@0:     WebGLTexture *tex = activeBoundTextureForTarget(target);
michael@0:     if (!tex)
michael@0:         return ErrorInvalidOperation("copyTexSubImage2D: no texture bound to this target");
michael@0: 
michael@0:     if (!tex->HasImageInfoAt(target, level))
michael@0:         return ErrorInvalidOperation("copyTexSubImage2D: no texture image previously defined for this level and face");
michael@0: 
michael@0:     const WebGLTexture::ImageInfo &imageInfo = tex->ImageInfoAt(target, level);
michael@0:     GLsizei texWidth = imageInfo.Width();
michael@0:     GLsizei texHeight = imageInfo.Height();
michael@0: 
michael@0:     if (xoffset + width > texWidth || xoffset + width < 0)
michael@0:       return ErrorInvalidValue("copyTexSubImage2D: xoffset+width is too large");
michael@0: 
michael@0:     if (yoffset + height > texHeight || yoffset + height < 0)
michael@0:       return ErrorInvalidValue("copyTexSubImage2D: yoffset+height is too large");
michael@0: 
michael@0:     GLenum webGLFormat = imageInfo.WebGLFormat();
michael@0:     if (IsGLDepthFormat(webGLFormat) || IsGLDepthStencilFormat(webGLFormat))
michael@0:         return ErrorInvalidOperation("copyTexSubImage2D: a base internal format of DEPTH_COMPONENT or DEPTH_STENCIL isn't supported");
michael@0: 
michael@0:     if (mBoundFramebuffer) {
michael@0:         if (!mBoundFramebuffer->CheckAndInitializeAttachments())
michael@0:             return ErrorInvalidFramebufferOperation("copyTexSubImage2D: incomplete framebuffer");
michael@0: 
michael@0:         GLenum readPlaneBits = LOCAL_GL_COLOR_BUFFER_BIT;
michael@0:         if (!mBoundFramebuffer->HasCompletePlanes(readPlaneBits)) {
michael@0:             return ErrorInvalidOperation("copyTexSubImage2D: Read source attachment doesn't have the"
michael@0:                                          " correct color/depth/stencil type.");
michael@0:         }
michael@0:     } else {
michael@0:         ClearBackbufferIfNeeded();
michael@0:     }
michael@0: 
michael@0:     bool texFormatRequiresAlpha = FormatHasAlpha(webGLFormat);
michael@0:     bool fboFormatHasAlpha = mBoundFramebuffer ? mBoundFramebuffer->ColorAttachment(0).HasAlpha()
michael@0:                                                : bool(gl->GetPixelFormat().alpha > 0);
michael@0: 
michael@0:     if (texFormatRequiresAlpha && !fboFormatHasAlpha)
michael@0:         return ErrorInvalidOperation("copyTexSubImage2D: texture format requires an alpha channel "
michael@0:                                      "but the framebuffer doesn't have one");
michael@0: 
michael@0:     if (imageInfo.HasUninitializedImageData()) {
michael@0:         tex->DoDeferredImageInitialization(target, level);
michael@0:     }
michael@0: 
michael@0:     return CopyTexSubImage2D_base(target, level, webGLFormat, xoffset, yoffset, x, y, width, height, true);
michael@0: }
michael@0: 
michael@0: 
michael@0: already_AddRefed<WebGLProgram>
michael@0: WebGLContext::CreateProgram()
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return nullptr;
michael@0:     nsRefPtr<WebGLProgram> globj = new WebGLProgram(this);
michael@0:     return globj.forget();
michael@0: }
michael@0: 
michael@0: already_AddRefed<WebGLShader>
michael@0: WebGLContext::CreateShader(GLenum type)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return nullptr;
michael@0: 
michael@0:     if (type != LOCAL_GL_VERTEX_SHADER &&
michael@0:         type != LOCAL_GL_FRAGMENT_SHADER)
michael@0:     {
michael@0:         ErrorInvalidEnumInfo("createShader: type", type);
michael@0:         return nullptr;
michael@0:     }
michael@0: 
michael@0:     nsRefPtr<WebGLShader> shader = new WebGLShader(this, type);
michael@0:     return shader.forget();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::CullFace(GLenum face)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateFaceEnum(face, "cullFace"))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fCullFace(face);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::DeleteFramebuffer(WebGLFramebuffer* fbuf)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObjectAllowDeletedOrNull("deleteFramebuffer", fbuf))
michael@0:         return;
michael@0: 
michael@0:     if (!fbuf || fbuf->IsDeleted())
michael@0:         return;
michael@0: 
michael@0:     fbuf->RequestDelete();
michael@0: 
michael@0:     if (mBoundFramebuffer == fbuf)
michael@0:         BindFramebuffer(LOCAL_GL_FRAMEBUFFER,
michael@0:                         static_cast<WebGLFramebuffer*>(nullptr));
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::DeleteRenderbuffer(WebGLRenderbuffer *rbuf)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObjectAllowDeletedOrNull("deleteRenderbuffer", rbuf))
michael@0:         return;
michael@0: 
michael@0:     if (!rbuf || rbuf->IsDeleted())
michael@0:         return;
michael@0: 
michael@0:     if (mBoundFramebuffer)
michael@0:         mBoundFramebuffer->DetachRenderbuffer(rbuf);
michael@0: 
michael@0:     // Invalidate framebuffer status cache
michael@0:     rbuf->NotifyFBsStatusChanged();
michael@0: 
michael@0:     if (mBoundRenderbuffer == rbuf)
michael@0:         BindRenderbuffer(LOCAL_GL_RENDERBUFFER,
michael@0:                          static_cast<WebGLRenderbuffer*>(nullptr));
michael@0: 
michael@0:     rbuf->RequestDelete();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::DeleteTexture(WebGLTexture *tex)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObjectAllowDeletedOrNull("deleteTexture", tex))
michael@0:         return;
michael@0: 
michael@0:     if (!tex || tex->IsDeleted())
michael@0:         return;
michael@0: 
michael@0:     if (mBoundFramebuffer)
michael@0:         mBoundFramebuffer->DetachTexture(tex);
michael@0: 
michael@0:     // Invalidate framebuffer status cache
michael@0:     tex->NotifyFBsStatusChanged();
michael@0: 
michael@0:     GLuint activeTexture = mActiveTexture;
michael@0:     for (int32_t i = 0; i < mGLMaxTextureUnits; i++) {
michael@0:         if ((tex->Target() == LOCAL_GL_TEXTURE_2D && mBound2DTextures[i] == tex) ||
michael@0:             (tex->Target() == LOCAL_GL_TEXTURE_CUBE_MAP && mBoundCubeMapTextures[i] == tex))
michael@0:         {
michael@0:             ActiveTexture(LOCAL_GL_TEXTURE0 + i);
michael@0:             BindTexture(tex->Target(), static_cast<WebGLTexture*>(nullptr));
michael@0:         }
michael@0:     }
michael@0:     ActiveTexture(LOCAL_GL_TEXTURE0 + activeTexture);
michael@0: 
michael@0:     tex->RequestDelete();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::DeleteProgram(WebGLProgram *prog)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObjectAllowDeletedOrNull("deleteProgram", prog))
michael@0:         return;
michael@0: 
michael@0:     if (!prog || prog->IsDeleted())
michael@0:         return;
michael@0: 
michael@0:     prog->RequestDelete();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::DeleteShader(WebGLShader *shader)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObjectAllowDeletedOrNull("deleteShader", shader))
michael@0:         return;
michael@0: 
michael@0:     if (!shader || shader->IsDeleted())
michael@0:         return;
michael@0: 
michael@0:     shader->RequestDelete();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::DetachShader(WebGLProgram *program, WebGLShader *shader)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObject("detachShader: program", program) ||
michael@0:         // it's valid to attempt to detach a deleted shader, since it's
michael@0:         // still a shader
michael@0:         !ValidateObjectAllowDeleted("detashShader: shader", shader))
michael@0:         return;
michael@0: 
michael@0:     if (!program->DetachShader(shader))
michael@0:         return ErrorInvalidOperation("detachShader: shader is not attached");
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::DepthFunc(GLenum func)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateComparisonEnum(func, "depthFunc"))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fDepthFunc(func);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::DepthRange(GLfloat zNear, GLfloat zFar)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (zNear > zFar)
michael@0:         return ErrorInvalidOperation("depthRange: the near value is greater than the far value!");
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fDepthRange(zNear, zFar);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::FramebufferRenderbuffer(GLenum target, GLenum attachment, GLenum rbtarget, WebGLRenderbuffer *wrb)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!mBoundFramebuffer)
michael@0:         return ErrorInvalidOperation("framebufferRenderbuffer: cannot modify framebuffer 0");
michael@0: 
michael@0:     return mBoundFramebuffer->FramebufferRenderbuffer(target, attachment, rbtarget, wrb);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::FramebufferTexture2D(GLenum target,
michael@0:                                    GLenum attachment,
michael@0:                                    GLenum textarget,
michael@0:                                    WebGLTexture *tobj,
michael@0:                                    GLint level)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!mBoundFramebuffer)
michael@0:         return ErrorInvalidOperation("framebufferRenderbuffer: cannot modify framebuffer 0");
michael@0: 
michael@0:     return mBoundFramebuffer->FramebufferTexture2D(target, attachment, textarget, tobj, level);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::FrontFace(GLenum mode)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     switch (mode) {
michael@0:         case LOCAL_GL_CW:
michael@0:         case LOCAL_GL_CCW:
michael@0:             break;
michael@0:         default:
michael@0:             return ErrorInvalidEnumInfo("frontFace: mode", mode);
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fFrontFace(mode);
michael@0: }
michael@0: 
michael@0: already_AddRefed<WebGLActiveInfo>
michael@0: WebGLContext::GetActiveAttrib(WebGLProgram *prog, uint32_t index)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return nullptr;
michael@0: 
michael@0:     if (!ValidateObject("getActiveAttrib: program", prog))
michael@0:         return nullptr;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     GLint len = 0;
michael@0:     GLuint progname = prog->GLName();;
michael@0:     gl->fGetProgramiv(progname, LOCAL_GL_ACTIVE_ATTRIBUTE_MAX_LENGTH, &len);
michael@0:     if (len == 0)
michael@0:         return nullptr;
michael@0: 
michael@0:     nsAutoArrayPtr<char> name(new char[len]);
michael@0:     GLint attrsize = 0;
michael@0:     GLuint attrtype = 0;
michael@0: 
michael@0:     gl->fGetActiveAttrib(progname, index, len, &len, &attrsize, &attrtype, name);
michael@0:     if (attrsize == 0 || attrtype == 0) {
michael@0:         return nullptr;
michael@0:     }
michael@0: 
michael@0:     nsCString reverseMappedName;
michael@0:     prog->ReverseMapIdentifier(nsDependentCString(name), &reverseMappedName);
michael@0: 
michael@0:     nsRefPtr<WebGLActiveInfo> retActiveInfo =
michael@0:         new WebGLActiveInfo(attrsize, attrtype, reverseMappedName);
michael@0:     return retActiveInfo.forget();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::GenerateMipmap(GLenum target)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateTextureTargetEnum(target, "generateMipmap"))
michael@0:         return;
michael@0: 
michael@0:     WebGLTexture *tex = activeBoundTextureForTarget(target);
michael@0: 
michael@0:     if (!tex)
michael@0:         return ErrorInvalidOperation("generateMipmap: No texture is bound to this target.");
michael@0: 
michael@0:     GLenum imageTarget = (target == LOCAL_GL_TEXTURE_2D) ? LOCAL_GL_TEXTURE_2D
michael@0:                                                          : LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X;
michael@0:     if (!tex->HasImageInfoAt(imageTarget, 0))
michael@0:     {
michael@0:         return ErrorInvalidOperation("generateMipmap: Level zero of texture is not defined.");
michael@0:     }
michael@0: 
michael@0:     if (!tex->IsFirstImagePowerOfTwo())
michael@0:         return ErrorInvalidOperation("generateMipmap: Level zero of texture does not have power-of-two width and height.");
michael@0: 
michael@0:     GLenum webGLFormat = tex->ImageInfoAt(imageTarget, 0).WebGLFormat();
michael@0:     if (IsTextureFormatCompressed(webGLFormat))
michael@0:         return ErrorInvalidOperation("generateMipmap: Texture data at level zero is compressed.");
michael@0: 
michael@0:     if (IsExtensionEnabled(WebGLExtensionID::WEBGL_depth_texture) &&
michael@0:         (IsGLDepthFormat(webGLFormat) || IsGLDepthStencilFormat(webGLFormat)))
michael@0:     {
michael@0:         return ErrorInvalidOperation("generateMipmap: "
michael@0:                                      "A texture that has a base internal format of "
michael@0:                                      "DEPTH_COMPONENT or DEPTH_STENCIL isn't supported");
michael@0:     }
michael@0: 
michael@0:     if (!tex->AreAllLevel0ImageInfosEqual())
michael@0:         return ErrorInvalidOperation("generateMipmap: The six faces of this cube map have different dimensions, format, or type.");
michael@0: 
michael@0:     tex->SetGeneratedMipmap();
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     if (gl->WorkAroundDriverBugs()) {
michael@0:         // bug 696495 - to work around failures in the texture-mips.html test on various drivers, we
michael@0:         // set the minification filter before calling glGenerateMipmap. This should not carry a significant performance
michael@0:         // overhead so we do it unconditionally.
michael@0:         //
michael@0:         // note that the choice of GL_NEAREST_MIPMAP_NEAREST really matters. See Chromium bug 101105.
michael@0:         gl->fTexParameteri(target, LOCAL_GL_TEXTURE_MIN_FILTER, LOCAL_GL_NEAREST_MIPMAP_NEAREST);
michael@0:         gl->fGenerateMipmap(target);
michael@0:         gl->fTexParameteri(target, LOCAL_GL_TEXTURE_MIN_FILTER, tex->MinFilter());
michael@0:     } else {
michael@0:         gl->fGenerateMipmap(target);
michael@0:     }
michael@0: }
michael@0: 
michael@0: already_AddRefed<WebGLActiveInfo>
michael@0: WebGLContext::GetActiveUniform(WebGLProgram *prog, uint32_t index)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return nullptr;
michael@0: 
michael@0:     if (!ValidateObject("getActiveUniform: program", prog))
michael@0:         return nullptr;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     GLint len = 0;
michael@0:     GLuint progname = prog->GLName();
michael@0:     gl->fGetProgramiv(progname, LOCAL_GL_ACTIVE_UNIFORM_MAX_LENGTH, &len);
michael@0:     if (len == 0)
michael@0:         return nullptr;
michael@0: 
michael@0:     nsAutoArrayPtr<char> name(new char[len]);
michael@0: 
michael@0:     GLint usize = 0;
michael@0:     GLuint utype = 0;
michael@0: 
michael@0:     gl->fGetActiveUniform(progname, index, len, &len, &usize, &utype, name);
michael@0:     if (len == 0 || usize == 0 || utype == 0) {
michael@0:         return nullptr;
michael@0:     }
michael@0: 
michael@0:     nsCString reverseMappedName;
michael@0:     prog->ReverseMapIdentifier(nsDependentCString(name), &reverseMappedName);
michael@0: 
michael@0:     // OpenGL ES 2.0 specifies that if foo is a uniform array, GetActiveUniform returns its name as "foo[0]".
michael@0:     // See section 2.10 page 35 in the OpenGL ES 2.0.24 specification:
michael@0:     //
michael@0:     // > If the active uniform is an array, the uniform name returned in name will always
michael@0:     // > be the name of the uniform array appended with "[0]".
michael@0:     //
michael@0:     // There is no such requirement in the OpenGL (non-ES) spec and indeed we have OpenGL implementations returning
michael@0:     // "foo" instead of "foo[0]". So, when implementing WebGL on top of desktop OpenGL, we must check if the
michael@0:     // returned name ends in [0], and if it doesn't, append that.
michael@0:     //
michael@0:     // In principle we don't need to do that on OpenGL ES, but this is such a tricky difference between the ES and non-ES
michael@0:     // specs that it seems probable that some ES implementers will overlook it. Since the work-around is quite cheap,
michael@0:     // we do it unconditionally.
michael@0:     if (usize > 1 && reverseMappedName.CharAt(reverseMappedName.Length()-1) != ']')
michael@0:         reverseMappedName.AppendLiteral("[0]");
michael@0: 
michael@0:     nsRefPtr<WebGLActiveInfo> retActiveInfo =
michael@0:         new WebGLActiveInfo(usize, utype, reverseMappedName);
michael@0:     return retActiveInfo.forget();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::GetAttachedShaders(WebGLProgram *prog,
michael@0:                                  Nullable< nsTArray<WebGLShader*> > &retval)
michael@0: {
michael@0:     retval.SetNull();
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObjectAllowNull("getAttachedShaders", prog))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     if (!prog) {
michael@0:         retval.SetNull();
michael@0:         ErrorInvalidValue("getAttachedShaders: invalid program");
michael@0:     } else if (prog->AttachedShaders().Length() == 0) {
michael@0:         retval.SetValue().TruncateLength(0);
michael@0:     } else {
michael@0:         retval.SetValue().AppendElements(prog->AttachedShaders());
michael@0:     }
michael@0: }
michael@0: 
michael@0: GLint
michael@0: WebGLContext::GetAttribLocation(WebGLProgram *prog, const nsAString& name)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return -1;
michael@0: 
michael@0:     if (!ValidateObject("getAttribLocation: program", prog))
michael@0:         return -1;
michael@0: 
michael@0:     if (!ValidateGLSLVariableName(name, "getAttribLocation"))
michael@0:         return -1;
michael@0: 
michael@0:     NS_LossyConvertUTF16toASCII cname(name);
michael@0:     nsCString mappedName;
michael@0:     prog->MapIdentifier(cname, &mappedName);
michael@0: 
michael@0:     GLuint progname = prog->GLName();
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     return gl->fGetAttribLocation(progname, mappedName.get());
michael@0: }
michael@0: 
michael@0: JS::Value
michael@0: WebGLContext::GetBufferParameter(GLenum target, GLenum pname)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return JS::NullValue();
michael@0: 
michael@0:     if (target != LOCAL_GL_ARRAY_BUFFER && target != LOCAL_GL_ELEMENT_ARRAY_BUFFER) {
michael@0:         ErrorInvalidEnumInfo("getBufferParameter: target", target);
michael@0:         return JS::NullValue();
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     switch (pname) {
michael@0:         case LOCAL_GL_BUFFER_SIZE:
michael@0:         case LOCAL_GL_BUFFER_USAGE:
michael@0:         {
michael@0:             GLint i = 0;
michael@0:             gl->fGetBufferParameteriv(target, pname, &i);
michael@0:             if (pname == LOCAL_GL_BUFFER_SIZE) {
michael@0:                 return JS::Int32Value(i);
michael@0:             }
michael@0: 
michael@0:             MOZ_ASSERT(pname == LOCAL_GL_BUFFER_USAGE);
michael@0:             return JS::NumberValue(uint32_t(i));
michael@0:         }
michael@0:             break;
michael@0: 
michael@0:         default:
michael@0:             ErrorInvalidEnumInfo("getBufferParameter: parameter", pname);
michael@0:     }
michael@0: 
michael@0:     return JS::NullValue();
michael@0: }
michael@0: 
michael@0: JS::Value
michael@0: WebGLContext::GetFramebufferAttachmentParameter(JSContext* cx,
michael@0:                                                 GLenum target,
michael@0:                                                 GLenum attachment,
michael@0:                                                 GLenum pname,
michael@0:                                                 ErrorResult& rv)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return JS::NullValue();
michael@0: 
michael@0:     if (target != LOCAL_GL_FRAMEBUFFER) {
michael@0:         ErrorInvalidEnumInfo("getFramebufferAttachmentParameter: target", target);
michael@0:         return JS::NullValue();
michael@0:     }
michael@0: 
michael@0:     if (!mBoundFramebuffer) {
michael@0:         ErrorInvalidOperation("getFramebufferAttachmentParameter: cannot query framebuffer 0");
michael@0:         return JS::NullValue();
michael@0:     }
michael@0: 
michael@0:     if (attachment != LOCAL_GL_DEPTH_ATTACHMENT &&
michael@0:         attachment != LOCAL_GL_STENCIL_ATTACHMENT &&
michael@0:         attachment != LOCAL_GL_DEPTH_STENCIL_ATTACHMENT)
michael@0:     {
michael@0:         if (IsExtensionEnabled(WebGLExtensionID::WEBGL_draw_buffers))
michael@0:         {
michael@0:             if (attachment < LOCAL_GL_COLOR_ATTACHMENT0 ||
michael@0:                 attachment >= GLenum(LOCAL_GL_COLOR_ATTACHMENT0 + mGLMaxColorAttachments))
michael@0:             {
michael@0:                 ErrorInvalidEnumInfo("getFramebufferAttachmentParameter: attachment", attachment);
michael@0:                 return JS::NullValue();
michael@0:             }
michael@0: 
michael@0:             mBoundFramebuffer->EnsureColorAttachments(attachment - LOCAL_GL_COLOR_ATTACHMENT0);
michael@0:         }
michael@0:         else if (attachment != LOCAL_GL_COLOR_ATTACHMENT0)
michael@0:         {
michael@0:             ErrorInvalidEnumInfo("getFramebufferAttachmentParameter: attachment", attachment);
michael@0:             return JS::NullValue();
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     const WebGLFramebuffer::Attachment& fba = mBoundFramebuffer->GetAttachment(attachment);
michael@0: 
michael@0:     if (fba.Renderbuffer()) {
michael@0:         switch (pname) {
michael@0:             case LOCAL_GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT:
michael@0:                 if (IsExtensionEnabled(WebGLExtensionID::EXT_sRGB)) {
michael@0:                     const GLenum internalFormat = fba.Renderbuffer()->InternalFormat();
michael@0:                     return (internalFormat == LOCAL_GL_SRGB_EXT ||
michael@0:                             internalFormat == LOCAL_GL_SRGB_ALPHA_EXT ||
michael@0:                             internalFormat == LOCAL_GL_SRGB8_ALPHA8_EXT) ?
michael@0:                         JS::NumberValue(uint32_t(LOCAL_GL_SRGB_EXT)) :
michael@0:                         JS::NumberValue(uint32_t(LOCAL_GL_LINEAR));
michael@0:                 }
michael@0:                 break;
michael@0: 
michael@0:             case LOCAL_GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE:
michael@0:                 return JS::NumberValue(uint32_t(LOCAL_GL_RENDERBUFFER));
michael@0: 
michael@0:             case LOCAL_GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME:
michael@0:                 return WebGLObjectAsJSValue(cx, fba.Renderbuffer(), rv);
michael@0: 
michael@0:             case LOCAL_GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE: {
michael@0:                 if (!IsExtensionEnabled(WebGLExtensionID::EXT_color_buffer_half_float) &&
michael@0:                     !IsExtensionEnabled(WebGLExtensionID::WEBGL_color_buffer_float))
michael@0:                 {
michael@0:                     break;
michael@0:                 }
michael@0: 
michael@0:                 if (attachment == LOCAL_GL_DEPTH_STENCIL_ATTACHMENT) {
michael@0:                     ErrorInvalidOperation("getFramebufferAttachmentParameter: Cannot get component"
michael@0:                                           " type of a depth-stencil attachment.");
michael@0:                     return JS::NullValue();
michael@0:                 }
michael@0: 
michael@0:                 if (!fba.IsComplete())
michael@0:                     return JS::NumberValue(uint32_t(LOCAL_GL_NONE));
michael@0: 
michael@0:                 uint32_t ret = LOCAL_GL_NONE;
michael@0:                 switch (fba.Renderbuffer()->InternalFormat()) {
michael@0:                 case LOCAL_GL_RGBA4:
michael@0:                 case LOCAL_GL_RGB5_A1:
michael@0:                 case LOCAL_GL_RGB565:
michael@0:                 case LOCAL_GL_SRGB8_ALPHA8:
michael@0:                     ret = LOCAL_GL_UNSIGNED_NORMALIZED;
michael@0:                     break;
michael@0:                 case LOCAL_GL_RGB16F:
michael@0:                 case LOCAL_GL_RGBA16F:
michael@0:                 case LOCAL_GL_RGB32F:
michael@0:                 case LOCAL_GL_RGBA32F:
michael@0:                     ret = LOCAL_GL_FLOAT;
michael@0:                     break;
michael@0:                 case LOCAL_GL_DEPTH_COMPONENT16:
michael@0:                 case LOCAL_GL_STENCIL_INDEX8:
michael@0:                     ret = LOCAL_GL_UNSIGNED_INT;
michael@0:                     break;
michael@0:                 default:
michael@0:                     MOZ_ASSERT(false, "Unhandled RB component type.");
michael@0:                     break;
michael@0:                 }
michael@0:                 return JS::NumberValue(uint32_t(ret));
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         ErrorInvalidEnumInfo("getFramebufferAttachmentParameter: pname", pname);
michael@0:         return JS::NullValue();
michael@0:     } else if (fba.Texture()) {
michael@0:         switch (pname) {
michael@0:              case LOCAL_GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT:
michael@0:                 if (IsExtensionEnabled(WebGLExtensionID::EXT_sRGB)) {
michael@0:                     const GLenum webGLFormat =
michael@0:                         fba.Texture()->ImageInfoBase().WebGLFormat();
michael@0:                     return (webGLFormat == LOCAL_GL_SRGB ||
michael@0:                             webGLFormat == LOCAL_GL_SRGB_ALPHA) ?
michael@0:                         JS::NumberValue(uint32_t(LOCAL_GL_SRGB)) :
michael@0:                         JS::NumberValue(uint32_t(LOCAL_GL_LINEAR));
michael@0:                 }
michael@0:                 break;
michael@0: 
michael@0:             case LOCAL_GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE:
michael@0:                 return JS::NumberValue(uint32_t(LOCAL_GL_TEXTURE));
michael@0: 
michael@0:             case LOCAL_GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME:
michael@0:                 return WebGLObjectAsJSValue(cx, fba.Texture(), rv);
michael@0: 
michael@0:             case LOCAL_GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL:
michael@0:                 return JS::Int32Value(fba.TexImageLevel());
michael@0: 
michael@0:             case LOCAL_GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: {
michael@0:                 GLenum face = fba.TexImageTarget();
michael@0:                 if (face == LOCAL_GL_TEXTURE_2D)
michael@0:                     face = 0;
michael@0:                 return JS::Int32Value(face);
michael@0:             }
michael@0: 
michael@0:             case LOCAL_GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE: {
michael@0:                 if (!IsExtensionEnabled(WebGLExtensionID::EXT_color_buffer_half_float) &&
michael@0:                     !IsExtensionEnabled(WebGLExtensionID::WEBGL_color_buffer_float))
michael@0:                 {
michael@0:                     break;
michael@0:                 }
michael@0: 
michael@0:                 if (attachment == LOCAL_GL_DEPTH_STENCIL_ATTACHMENT) {
michael@0:                     ErrorInvalidOperation("getFramebufferAttachmentParameter: cannot component"
michael@0:                                           " type of depth-stencil attachments.");
michael@0:                     return JS::NullValue();
michael@0:                 }
michael@0: 
michael@0:                 if (!fba.IsComplete())
michael@0:                     return JS::NumberValue(uint32_t(LOCAL_GL_NONE));
michael@0: 
michael@0:                 uint32_t ret = LOCAL_GL_NONE;
michael@0:                 GLenum type = fba.Texture()->ImageInfoAt(fba.TexImageTarget(),
michael@0:                                                          fba.TexImageLevel()).WebGLType();
michael@0:                 switch (type) {
michael@0:                 case LOCAL_GL_UNSIGNED_BYTE:
michael@0:                 case LOCAL_GL_UNSIGNED_SHORT_4_4_4_4:
michael@0:                 case LOCAL_GL_UNSIGNED_SHORT_5_5_5_1:
michael@0:                 case LOCAL_GL_UNSIGNED_SHORT_5_6_5:
michael@0:                     ret = LOCAL_GL_UNSIGNED_NORMALIZED;
michael@0:                     break;
michael@0:                 case LOCAL_GL_FLOAT:
michael@0:                 case LOCAL_GL_HALF_FLOAT_OES:
michael@0:                     ret = LOCAL_GL_FLOAT;
michael@0:                     break;
michael@0:                 case LOCAL_GL_UNSIGNED_SHORT:
michael@0:                 case LOCAL_GL_UNSIGNED_INT:
michael@0:                     ret = LOCAL_GL_UNSIGNED_INT;
michael@0:                     break;
michael@0:                 default:
michael@0:                     MOZ_ASSERT(false, "Unhandled RB component type.");
michael@0:                     break;
michael@0:                 }
michael@0:                 return JS::NumberValue(uint32_t(ret));
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         ErrorInvalidEnumInfo("getFramebufferAttachmentParameter: pname", pname);
michael@0:         return JS::NullValue();
michael@0:     } else {
michael@0:         switch (pname) {
michael@0:             case LOCAL_GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE:
michael@0:                 return JS::NumberValue(uint32_t(LOCAL_GL_NONE));
michael@0: 
michael@0:             default:
michael@0:                 ErrorInvalidEnumInfo("getFramebufferAttachmentParameter: pname", pname);
michael@0:                 return JS::NullValue();
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     return JS::NullValue();
michael@0: }
michael@0: 
michael@0: JS::Value
michael@0: WebGLContext::GetRenderbufferParameter(GLenum target, GLenum pname)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return JS::NullValue();
michael@0: 
michael@0:     if (target != LOCAL_GL_RENDERBUFFER) {
michael@0:         ErrorInvalidEnumInfo("getRenderbufferParameter: target", target);
michael@0:         return JS::NullValue();
michael@0:     }
michael@0: 
michael@0:     if (!mBoundRenderbuffer) {
michael@0:         ErrorInvalidOperation("getRenderbufferParameter: no render buffer is bound");
michael@0:         return JS::NullValue();
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     switch (pname) {
michael@0:         case LOCAL_GL_RENDERBUFFER_WIDTH:
michael@0:         case LOCAL_GL_RENDERBUFFER_HEIGHT:
michael@0:         case LOCAL_GL_RENDERBUFFER_RED_SIZE:
michael@0:         case LOCAL_GL_RENDERBUFFER_GREEN_SIZE:
michael@0:         case LOCAL_GL_RENDERBUFFER_BLUE_SIZE:
michael@0:         case LOCAL_GL_RENDERBUFFER_ALPHA_SIZE:
michael@0:         case LOCAL_GL_RENDERBUFFER_DEPTH_SIZE:
michael@0:         case LOCAL_GL_RENDERBUFFER_STENCIL_SIZE:
michael@0:         {
michael@0:             // RB emulation means we have to ask the RB itself.
michael@0:             GLint i = mBoundRenderbuffer->GetRenderbufferParameter(target, pname);
michael@0:             return JS::Int32Value(i);
michael@0:         }
michael@0:         case LOCAL_GL_RENDERBUFFER_INTERNAL_FORMAT:
michael@0:         {
michael@0:             return JS::NumberValue(mBoundRenderbuffer->InternalFormat());
michael@0:         }
michael@0:         default:
michael@0:             ErrorInvalidEnumInfo("getRenderbufferParameter: parameter", pname);
michael@0:     }
michael@0: 
michael@0:     return JS::NullValue();
michael@0: }
michael@0: 
michael@0: already_AddRefed<WebGLTexture>
michael@0: WebGLContext::CreateTexture()
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return nullptr;
michael@0:     nsRefPtr<WebGLTexture> globj = new WebGLTexture(this);
michael@0:     return globj.forget();
michael@0: }
michael@0: 
michael@0: static GLenum
michael@0: GetAndClearError(GLenum* errorVar)
michael@0: {
michael@0:     MOZ_ASSERT(errorVar);
michael@0:     GLenum ret = *errorVar;
michael@0:     *errorVar = LOCAL_GL_NO_ERROR;
michael@0:     return ret;
michael@0: }
michael@0: 
michael@0: GLenum
michael@0: WebGLContext::GetError()
michael@0: {
michael@0:     /* WebGL 1.0: Section 5.14.3: Setting and getting state:
michael@0:      *   If the context's webgl context lost flag is set, returns
michael@0:      *   CONTEXT_LOST_WEBGL the first time this method is called.
michael@0:      *   Afterward, returns NO_ERROR until the context has been
michael@0:      *   restored.
michael@0:      *
michael@0:      * WEBGL_lose_context:
michael@0:      *   [When this extension is enabled: ] loseContext and
michael@0:      *   restoreContext are allowed to generate INVALID_OPERATION errors
michael@0:      *   even when the context is lost.
michael@0:      */
michael@0: 
michael@0:     if (IsContextLost()) {
michael@0:         if (mEmitContextLostErrorOnce) {
michael@0:             mEmitContextLostErrorOnce = false;
michael@0:             return LOCAL_GL_CONTEXT_LOST;
michael@0:         }
michael@0:         // Don't return yet, since WEBGL_lose_contexts contradicts the
michael@0:         // original spec, and allows error generation while lost.
michael@0:     }
michael@0: 
michael@0:     GLenum err = GetAndClearError(&mWebGLError);
michael@0:     if (err != LOCAL_GL_NO_ERROR)
michael@0:         return err;
michael@0: 
michael@0:     if (IsContextLost())
michael@0:         return LOCAL_GL_NO_ERROR;
michael@0: 
michael@0:     // Either no WebGL-side error, or it's already been cleared.
michael@0:     // UnderlyingGL-side errors, now.
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     GetAndFlushUnderlyingGLErrors();
michael@0: 
michael@0:     err = GetAndClearError(&mUnderlyingGLError);
michael@0:     return err;
michael@0: }
michael@0: 
michael@0: JS::Value
michael@0: WebGLContext::GetProgramParameter(WebGLProgram *prog, GLenum pname)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return JS::NullValue();
michael@0: 
michael@0:     if (!ValidateObjectAllowDeleted("getProgramParameter: program", prog))
michael@0:         return JS::NullValue();
michael@0: 
michael@0:     GLuint progname = prog->GLName();
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     switch (pname) {
michael@0:         case LOCAL_GL_ATTACHED_SHADERS:
michael@0:         case LOCAL_GL_ACTIVE_UNIFORMS:
michael@0:         case LOCAL_GL_ACTIVE_ATTRIBUTES:
michael@0:         {
michael@0:             GLint i = 0;
michael@0:             gl->fGetProgramiv(progname, pname, &i);
michael@0:             return JS::Int32Value(i);
michael@0:         }
michael@0:         case LOCAL_GL_DELETE_STATUS:
michael@0:             return JS::BooleanValue(prog->IsDeleteRequested());
michael@0:         case LOCAL_GL_LINK_STATUS:
michael@0:         {
michael@0:             return JS::BooleanValue(prog->LinkStatus());
michael@0:         }
michael@0:         case LOCAL_GL_VALIDATE_STATUS:
michael@0:         {
michael@0:             GLint i = 0;
michael@0: #ifdef XP_MACOSX
michael@0:             // See comment in ValidateProgram below.
michael@0:             if (gl->WorkAroundDriverBugs())
michael@0:                 i = 1;
michael@0:             else
michael@0:                 gl->fGetProgramiv(progname, pname, &i);
michael@0: #else
michael@0:             gl->fGetProgramiv(progname, pname, &i);
michael@0: #endif
michael@0:             return JS::BooleanValue(bool(i));
michael@0:         }
michael@0:             break;
michael@0: 
michael@0:         default:
michael@0:             ErrorInvalidEnumInfo("getProgramParameter: parameter", pname);
michael@0:     }
michael@0: 
michael@0:     return JS::NullValue();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::GetProgramInfoLog(WebGLProgram *prog, nsAString& retval)
michael@0: {
michael@0:     nsAutoCString s;
michael@0:     GetProgramInfoLog(prog, s);
michael@0:     if (s.IsVoid())
michael@0:         retval.SetIsVoid(true);
michael@0:     else
michael@0:         CopyASCIItoUTF16(s, retval);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::GetProgramInfoLog(WebGLProgram *prog, nsACString& retval)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:     {
michael@0:         retval.SetIsVoid(true);
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (!ValidateObject("getProgramInfoLog: program", prog)) {
michael@0:         retval.Truncate();
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     GLuint progname = prog->GLName();
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     GLint k = -1;
michael@0:     gl->fGetProgramiv(progname, LOCAL_GL_INFO_LOG_LENGTH, &k);
michael@0:     if (k == -1) {
michael@0:         // If GetProgramiv doesn't modify |k|,
michael@0:         // it's because there was a GL error.
michael@0:         // GetProgramInfoLog should return null on error. (Bug 746740)
michael@0:         retval.SetIsVoid(true);
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (k == 0) {
michael@0:         retval.Truncate();
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     retval.SetCapacity(k);
michael@0:     gl->fGetProgramInfoLog(progname, k, &k, (char*) retval.BeginWriting());
michael@0:     retval.SetLength(k);
michael@0: }
michael@0: 
michael@0: // here we have to support all pnames with both int and float params.
michael@0: // See this discussion:
michael@0: //  https://www.khronos.org/webgl/public-mailing-list/archives/1008/msg00014.html
michael@0: void WebGLContext::TexParameter_base(GLenum target, GLenum pname,
michael@0:                                      GLint *intParamPtr,
michael@0:                                      GLfloat *floatParamPtr)
michael@0: {
michael@0:     MOZ_ASSERT(intParamPtr || floatParamPtr);
michael@0: 
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     GLint intParam = intParamPtr ? *intParamPtr : GLint(*floatParamPtr);
michael@0:     GLfloat floatParam = floatParamPtr ? *floatParamPtr : GLfloat(*intParamPtr);
michael@0: 
michael@0:     if (!ValidateTextureTargetEnum(target, "texParameter: target"))
michael@0:         return;
michael@0: 
michael@0:     WebGLTexture *tex = activeBoundTextureForTarget(target);
michael@0:     if (!tex)
michael@0:         return ErrorInvalidOperation("texParameter: no texture is bound to this target");
michael@0: 
michael@0:     bool pnameAndParamAreIncompatible = false;
michael@0:     bool paramValueInvalid = false;
michael@0: 
michael@0:     switch (pname) {
michael@0:         case LOCAL_GL_TEXTURE_MIN_FILTER:
michael@0:             switch (intParam) {
michael@0:                 case LOCAL_GL_NEAREST:
michael@0:                 case LOCAL_GL_LINEAR:
michael@0:                 case LOCAL_GL_NEAREST_MIPMAP_NEAREST:
michael@0:                 case LOCAL_GL_LINEAR_MIPMAP_NEAREST:
michael@0:                 case LOCAL_GL_NEAREST_MIPMAP_LINEAR:
michael@0:                 case LOCAL_GL_LINEAR_MIPMAP_LINEAR:
michael@0:                     tex->SetMinFilter(intParam);
michael@0:                     break;
michael@0:                 default:
michael@0:                     pnameAndParamAreIncompatible = true;
michael@0:             }
michael@0:             break;
michael@0:         case LOCAL_GL_TEXTURE_MAG_FILTER:
michael@0:             switch (intParam) {
michael@0:                 case LOCAL_GL_NEAREST:
michael@0:                 case LOCAL_GL_LINEAR:
michael@0:                     tex->SetMagFilter(intParam);
michael@0:                     break;
michael@0:                 default:
michael@0:                     pnameAndParamAreIncompatible = true;
michael@0:             }
michael@0:             break;
michael@0:         case LOCAL_GL_TEXTURE_WRAP_S:
michael@0:             switch (intParam) {
michael@0:                 case LOCAL_GL_CLAMP_TO_EDGE:
michael@0:                 case LOCAL_GL_MIRRORED_REPEAT:
michael@0:                 case LOCAL_GL_REPEAT:
michael@0:                     tex->SetWrapS(intParam);
michael@0:                     break;
michael@0:                 default:
michael@0:                     pnameAndParamAreIncompatible = true;
michael@0:             }
michael@0:             break;
michael@0:         case LOCAL_GL_TEXTURE_WRAP_T:
michael@0:             switch (intParam) {
michael@0:                 case LOCAL_GL_CLAMP_TO_EDGE:
michael@0:                 case LOCAL_GL_MIRRORED_REPEAT:
michael@0:                 case LOCAL_GL_REPEAT:
michael@0:                     tex->SetWrapT(intParam);
michael@0:                     break;
michael@0:                 default:
michael@0:                     pnameAndParamAreIncompatible = true;
michael@0:             }
michael@0:             break;
michael@0:         case LOCAL_GL_TEXTURE_MAX_ANISOTROPY_EXT:
michael@0:             if (IsExtensionEnabled(WebGLExtensionID::EXT_texture_filter_anisotropic)) {
michael@0:                 if (floatParamPtr && floatParam < 1.f)
michael@0:                     paramValueInvalid = true;
michael@0:                 else if (intParamPtr && intParam < 1)
michael@0:                     paramValueInvalid = true;
michael@0:             }
michael@0:             else
michael@0:                 pnameAndParamAreIncompatible = true;
michael@0:             break;
michael@0:         default:
michael@0:             return ErrorInvalidEnumInfo("texParameter: pname", pname);
michael@0:     }
michael@0: 
michael@0:     if (pnameAndParamAreIncompatible) {
michael@0:         if (intParamPtr)
michael@0:             return ErrorInvalidEnum("texParameteri: pname %x and param %x (decimal %d) are mutually incompatible",
michael@0:                                     pname, intParam, intParam);
michael@0:         else
michael@0:             return ErrorInvalidEnum("texParameterf: pname %x and param %g are mutually incompatible",
michael@0:                                     pname, floatParam);
michael@0:     } else if (paramValueInvalid) {
michael@0:         if (intParamPtr)
michael@0:             return ErrorInvalidValue("texParameteri: pname %x and param %x (decimal %d) is invalid",
michael@0:                                     pname, intParam, intParam);
michael@0:         else
michael@0:             return ErrorInvalidValue("texParameterf: pname %x and param %g is invalid",
michael@0:                                     pname, floatParam);
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     if (intParamPtr)
michael@0:         gl->fTexParameteri(target, pname, intParam);
michael@0:     else
michael@0:         gl->fTexParameterf(target, pname, floatParam);
michael@0: }
michael@0: 
michael@0: JS::Value
michael@0: WebGLContext::GetTexParameter(GLenum target, GLenum pname)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return JS::NullValue();
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     if (!ValidateTextureTargetEnum(target, "getTexParameter: target"))
michael@0:         return JS::NullValue();
michael@0: 
michael@0:     if (!activeBoundTextureForTarget(target)) {
michael@0:         ErrorInvalidOperation("getTexParameter: no texture bound");
michael@0:         return JS::NullValue();
michael@0:     }
michael@0: 
michael@0:     switch (pname) {
michael@0:         case LOCAL_GL_TEXTURE_MIN_FILTER:
michael@0:         case LOCAL_GL_TEXTURE_MAG_FILTER:
michael@0:         case LOCAL_GL_TEXTURE_WRAP_S:
michael@0:         case LOCAL_GL_TEXTURE_WRAP_T:
michael@0:         {
michael@0:             GLint i = 0;
michael@0:             gl->fGetTexParameteriv(target, pname, &i);
michael@0:             return JS::NumberValue(uint32_t(i));
michael@0:         }
michael@0:         case LOCAL_GL_TEXTURE_MAX_ANISOTROPY_EXT:
michael@0:             if (IsExtensionEnabled(WebGLExtensionID::EXT_texture_filter_anisotropic)) {
michael@0:                 GLfloat f = 0.f;
michael@0:                 gl->fGetTexParameterfv(target, pname, &f);
michael@0:                 return JS::DoubleValue(f);
michael@0:             }
michael@0: 
michael@0:             ErrorInvalidEnumInfo("getTexParameter: parameter", pname);
michael@0:             break;
michael@0: 
michael@0:         default:
michael@0:             ErrorInvalidEnumInfo("getTexParameter: parameter", pname);
michael@0:     }
michael@0: 
michael@0:     return JS::NullValue();
michael@0: }
michael@0: 
michael@0: JS::Value
michael@0: WebGLContext::GetUniform(JSContext* cx, WebGLProgram *prog,
michael@0:                          WebGLUniformLocation *location)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return JS::NullValue();
michael@0: 
michael@0:     if (!ValidateObject("getUniform: program", prog))
michael@0:         return JS::NullValue();
michael@0: 
michael@0:     if (!ValidateObject("getUniform: location", location))
michael@0:         return JS::NullValue();
michael@0: 
michael@0:     if (location->Program() != prog) {
michael@0:         ErrorInvalidValue("getUniform: this uniform location corresponds to another program");
michael@0:         return JS::NullValue();
michael@0:     }
michael@0: 
michael@0:     if (location->ProgramGeneration() != prog->Generation()) {
michael@0:         ErrorInvalidOperation("getUniform: this uniform location is obsolete since the program has been relinked");
michael@0:         return JS::NullValue();
michael@0:     }
michael@0: 
michael@0:     GLuint progname = prog->GLName();
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     GLint uniforms = 0;
michael@0:     GLint uniformNameMaxLength = 0;
michael@0:     gl->fGetProgramiv(progname, LOCAL_GL_ACTIVE_UNIFORMS, &uniforms);
michael@0:     gl->fGetProgramiv(progname, LOCAL_GL_ACTIVE_UNIFORM_MAX_LENGTH, &uniformNameMaxLength);
michael@0: 
michael@0:     // we now need the type info to switch between fGetUniformfv and fGetUniformiv
michael@0:     // the only way to get that is to iterate through all active uniforms by index until
michael@0:     // one matches the given uniform location.
michael@0:     GLenum uniformType = 0;
michael@0:     nsAutoArrayPtr<GLchar> uniformName(new GLchar[uniformNameMaxLength]);
michael@0:     // this buffer has 16 more bytes to be able to store [index] at the end.
michael@0:     nsAutoArrayPtr<GLchar> uniformNameBracketIndex(new GLchar[uniformNameMaxLength + 16]);
michael@0: 
michael@0:     GLint index;
michael@0:     for (index = 0; index < uniforms; ++index) {
michael@0:         GLsizei length;
michael@0:         GLint size;
michael@0:         gl->fGetActiveUniform(progname, index, uniformNameMaxLength, &length,
michael@0:                               &size, &uniformType, uniformName);
michael@0:         if (gl->fGetUniformLocation(progname, uniformName) == location->Location())
michael@0:             break;
michael@0: 
michael@0:         // now we handle the case of array uniforms. In that case, fGetActiveUniform returned as 'size'
michael@0:         // the biggest index used plus one, so we need to loop over that. The 0 index has already been handled above,
michael@0:         // so we can start at one. For each index, we construct the string uniformName + "[" + index + "]".
michael@0:         if (size > 1) {
michael@0:             bool found_it = false;
michael@0:             if (uniformName[length - 1] == ']') { // if uniformName ends in [0]
michael@0:                 // remove the [0] at the end
michael@0:                 length -= 3;
michael@0:                 uniformName[length] = 0;
michael@0:             }
michael@0:             for (GLint arrayIndex = 1; arrayIndex < size; arrayIndex++) {
michael@0:                 sprintf(uniformNameBracketIndex.get(), "%s[%d]", uniformName.get(), arrayIndex);
michael@0:                 if (gl->fGetUniformLocation(progname, uniformNameBracketIndex) == location->Location()) {
michael@0:                     found_it = true;
michael@0:                     break;
michael@0:                 }
michael@0:             }
michael@0:             if (found_it) break;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     if (index == uniforms) {
michael@0:         GenerateWarning("getUniform: internal error: hit an OpenGL driver bug");
michael@0:         return JS::NullValue();
michael@0:     }
michael@0: 
michael@0:     GLenum baseType;
michael@0:     GLint unitSize;
michael@0:     if (!BaseTypeAndSizeFromUniformType(uniformType, &baseType, &unitSize)) {
michael@0:         GenerateWarning("getUniform: internal error: unknown uniform type 0x%x", uniformType);
michael@0:         return JS::NullValue();
michael@0:     }
michael@0: 
michael@0:     // this should never happen
michael@0:     if (unitSize > 16) {
michael@0:         GenerateWarning("getUniform: internal error: unexpected uniform unit size %d", unitSize);
michael@0:         return JS::NullValue();
michael@0:     }
michael@0: 
michael@0:     if (baseType == LOCAL_GL_FLOAT) {
michael@0:         GLfloat fv[16] = { GLfloat(0) };
michael@0:         gl->fGetUniformfv(progname, location->Location(), fv);
michael@0:         if (unitSize == 1) {
michael@0:             return JS::DoubleValue(fv[0]);
michael@0:         } else {
michael@0:             JSObject* obj = Float32Array::Create(cx, this, unitSize, fv);
michael@0:             if (!obj) {
michael@0:                 ErrorOutOfMemory("getUniform: out of memory");
michael@0:                 return JS::NullValue();
michael@0:             }
michael@0:             return JS::ObjectOrNullValue(obj);
michael@0:         }
michael@0:     } else if (baseType == LOCAL_GL_INT) {
michael@0:         GLint iv[16] = { 0 };
michael@0:         gl->fGetUniformiv(progname, location->Location(), iv);
michael@0:         if (unitSize == 1) {
michael@0:             return JS::Int32Value(iv[0]);
michael@0:         } else {
michael@0:             JSObject* obj = Int32Array::Create(cx, this, unitSize, iv);
michael@0:             if (!obj) {
michael@0:                 ErrorOutOfMemory("getUniform: out of memory");
michael@0:                 return JS::NullValue();
michael@0:             }
michael@0:             return JS::ObjectOrNullValue(obj);
michael@0:         }
michael@0:     } else if (baseType == LOCAL_GL_BOOL) {
michael@0:         GLint iv[16] = { 0 };
michael@0:         gl->fGetUniformiv(progname, location->Location(), iv);
michael@0:         if (unitSize == 1) {
michael@0:             return JS::BooleanValue(iv[0] ? true : false);
michael@0:         } else {
michael@0:             bool uv[16];
michael@0:             for (int k = 0; k < unitSize; k++)
michael@0:                 uv[k] = iv[k];
michael@0:             JS::Rooted<JS::Value> val(cx);
michael@0:             // Be careful: we don't want to convert all of |uv|!
michael@0:             if (!ToJSValue(cx, uv, unitSize, &val)) {
michael@0:                 ErrorOutOfMemory("getUniform: out of memory");
michael@0:                 return JS::NullValue();
michael@0:             }
michael@0:             return val;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     // Else preserving behavior, but I'm not sure this is correct per spec
michael@0:     return JS::UndefinedValue();
michael@0: }
michael@0: 
michael@0: already_AddRefed<WebGLUniformLocation>
michael@0: WebGLContext::GetUniformLocation(WebGLProgram *prog, const nsAString& name)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return nullptr;
michael@0: 
michael@0:     if (!ValidateObject("getUniformLocation: program", prog))
michael@0:         return nullptr;
michael@0: 
michael@0:     if (!ValidateGLSLVariableName(name, "getUniformLocation"))
michael@0:         return nullptr;
michael@0: 
michael@0:     NS_LossyConvertUTF16toASCII cname(name);
michael@0:     nsCString mappedName;
michael@0:     prog->MapIdentifier(cname, &mappedName);
michael@0: 
michael@0:     GLuint progname = prog->GLName();
michael@0:     MakeContextCurrent();
michael@0:     GLint intlocation = gl->fGetUniformLocation(progname, mappedName.get());
michael@0: 
michael@0:     nsRefPtr<WebGLUniformLocation> loc;
michael@0:     if (intlocation >= 0) {
michael@0:         WebGLUniformInfo info = prog->GetUniformInfoForMappedIdentifier(mappedName);
michael@0:         loc = new WebGLUniformLocation(this,
michael@0:                                        prog,
michael@0:                                        intlocation,
michael@0:                                        info);
michael@0:     }
michael@0:     return loc.forget();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Hint(GLenum target, GLenum mode)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     bool isValid = false;
michael@0: 
michael@0:     switch (target) {
michael@0:         case LOCAL_GL_GENERATE_MIPMAP_HINT:
michael@0:             isValid = true;
michael@0:             break;
michael@0:         case LOCAL_GL_FRAGMENT_SHADER_DERIVATIVE_HINT:
michael@0:             if (IsExtensionEnabled(WebGLExtensionID::OES_standard_derivatives))
michael@0:                 isValid = true;
michael@0:             break;
michael@0:     }
michael@0: 
michael@0:     if (!isValid)
michael@0:         return ErrorInvalidEnum("hint: invalid hint");
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fHint(target, mode);
michael@0: }
michael@0: 
michael@0: bool
michael@0: WebGLContext::IsFramebuffer(WebGLFramebuffer *fb)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return false;
michael@0: 
michael@0:     return ValidateObjectAllowDeleted("isFramebuffer", fb) &&
michael@0:         !fb->IsDeleted() &&
michael@0:         fb->HasEverBeenBound();
michael@0: }
michael@0: 
michael@0: bool
michael@0: WebGLContext::IsProgram(WebGLProgram *prog)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return false;
michael@0: 
michael@0:     return ValidateObjectAllowDeleted("isProgram", prog) && !prog->IsDeleted();
michael@0: }
michael@0: 
michael@0: bool
michael@0: WebGLContext::IsRenderbuffer(WebGLRenderbuffer *rb)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return false;
michael@0: 
michael@0:     return ValidateObjectAllowDeleted("isRenderBuffer", rb) &&
michael@0:         !rb->IsDeleted() &&
michael@0:         rb->HasEverBeenBound();
michael@0: }
michael@0: 
michael@0: bool
michael@0: WebGLContext::IsShader(WebGLShader *shader)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return false;
michael@0: 
michael@0:     return ValidateObjectAllowDeleted("isShader", shader) &&
michael@0:         !shader->IsDeleted();
michael@0: }
michael@0: 
michael@0: bool
michael@0: WebGLContext::IsTexture(WebGLTexture *tex)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return false;
michael@0: 
michael@0:     return ValidateObjectAllowDeleted("isTexture", tex) &&
michael@0:         !tex->IsDeleted() &&
michael@0:         tex->HasEverBeenBound();
michael@0: }
michael@0: 
michael@0: // Try to bind an attribute that is an array to location 0:
michael@0: bool WebGLContext::BindArrayAttribToLocation0(WebGLProgram *program)
michael@0: {
michael@0:     if (mBoundVertexArray->IsAttribArrayEnabled(0)) {
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     GLint leastArrayLocation = -1;
michael@0: 
michael@0:     std::map<GLint, nsCString>::iterator itr;
michael@0:     for (itr = program->mActiveAttribMap.begin();
michael@0:          itr != program->mActiveAttribMap.end();
michael@0:          itr++) {
michael@0:         int32_t index = itr->first;
michael@0:         if (mBoundVertexArray->IsAttribArrayEnabled(index) &&
michael@0:             index < leastArrayLocation)
michael@0:         {
michael@0:             leastArrayLocation = index;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     if (leastArrayLocation > 0) {
michael@0:         nsCString& attrName = program->mActiveAttribMap.find(leastArrayLocation)->second;
michael@0:         const char* attrNameCStr = attrName.get();
michael@0:         gl->fBindAttribLocation(program->GLName(), 0, attrNameCStr);
michael@0:         return true;
michael@0:     }
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::LinkProgram(WebGLProgram *program)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObject("linkProgram", program))
michael@0:         return;
michael@0: 
michael@0:     InvalidateBufferFetching(); // we do it early in this function
michael@0:     // as some of the validation below changes program state
michael@0: 
michael@0:     GLuint progname = program->GLName();
michael@0: 
michael@0:     if (!program->NextGeneration()) {
michael@0:         // XXX throw?
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (!program->HasBothShaderTypesAttached()) {
michael@0:         GenerateWarning("linkProgram: this program doesn't have both a vertex shader"
michael@0:                         " and a fragment shader");
michael@0:         program->SetLinkStatus(false);
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     // bug 777028
michael@0:     // Mesa can't handle more than 16 samplers per program, counting each array entry.
michael@0:     if (gl->WorkAroundDriverBugs() &&
michael@0:         mIsMesa &&
michael@0:         program->UpperBoundNumSamplerUniforms() > 16)
michael@0:     {
michael@0:         GenerateWarning("Programs with more than 16 samplers are disallowed on Mesa drivers " "to avoid a Mesa crasher.");
michael@0:         program->SetLinkStatus(false);
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     bool updateInfoSucceeded = false;
michael@0:     GLint ok = 0;
michael@0:     if (gl->WorkAroundDriverBugs() &&
michael@0:         program->HasBadShaderAttached())
michael@0:     {
michael@0:         // it's a common driver bug, caught by program-test.html, that linkProgram doesn't
michael@0:         // correctly preserve the state of an in-use program that has been attached a bad shader
michael@0:         // see bug 777883
michael@0:         ok = false;
michael@0:     } else {
michael@0:         MakeContextCurrent();
michael@0:         gl->fLinkProgram(progname);
michael@0:         gl->fGetProgramiv(progname, LOCAL_GL_LINK_STATUS, &ok);
michael@0: 
michael@0:         if (ok) {
michael@0:             updateInfoSucceeded = program->UpdateInfo();
michael@0:             program->SetLinkStatus(updateInfoSucceeded);
michael@0: 
michael@0:             if (BindArrayAttribToLocation0(program)) {
michael@0:                 GenerateWarning("linkProgram: relinking program to make attrib0 an "
michael@0:                                 "array.");
michael@0:                 gl->fLinkProgram(progname);
michael@0:                 gl->fGetProgramiv(progname, LOCAL_GL_LINK_STATUS, &ok);
michael@0:                 if (ok) {
michael@0:                     updateInfoSucceeded = program->UpdateInfo();
michael@0:                     program->SetLinkStatus(updateInfoSucceeded);
michael@0:                 }
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     if (ok) {
michael@0:         // Bug 750527
michael@0:         if (gl->WorkAroundDriverBugs() &&
michael@0:             updateInfoSucceeded &&
michael@0:             gl->Vendor() == gl::GLVendor::NVIDIA)
michael@0:         {
michael@0:             if (program == mCurrentProgram)
michael@0:                 gl->fUseProgram(progname);
michael@0:         }
michael@0:     } else {
michael@0:         program->SetLinkStatus(false);
michael@0: 
michael@0:         if (ShouldGenerateWarnings()) {
michael@0: 
michael@0:             // report shader/program infoLogs as warnings.
michael@0:             // note that shader compilation errors can be deferred to linkProgram,
michael@0:             // which is why we can't do anything in compileShader. In practice we could
michael@0:             // report in compileShader the translation errors generated by ANGLE,
michael@0:             // but it seems saner to keep a single way of obtaining shader infologs.
michael@0: 
michael@0:             nsAutoCString log;
michael@0: 
michael@0:             bool alreadyReportedShaderInfoLog = false;
michael@0: 
michael@0:             for (size_t i = 0; i < program->AttachedShaders().Length(); i++) {
michael@0: 
michael@0:                 WebGLShader* shader = program->AttachedShaders()[i];
michael@0: 
michael@0:                 if (shader->CompileStatus())
michael@0:                     continue;
michael@0: 
michael@0:                 const char *shaderTypeName = nullptr;
michael@0:                 if (shader->ShaderType() == LOCAL_GL_VERTEX_SHADER) {
michael@0:                     shaderTypeName = "vertex";
michael@0:                 } else if (shader->ShaderType() == LOCAL_GL_FRAGMENT_SHADER) {
michael@0:                     shaderTypeName = "fragment";
michael@0:                 } else {
michael@0:                     // should have been validated earlier
michael@0:                     MOZ_ASSERT(false);
michael@0:                     shaderTypeName = "<unknown>";
michael@0:                 }
michael@0: 
michael@0:                 GetShaderInfoLog(shader, log);
michael@0: 
michael@0:                 GenerateWarning("linkProgram: a %s shader used in this program failed to "
michael@0:                                 "compile, with this log:\n%s\n",
michael@0:                                 shaderTypeName,
michael@0:                                 log.get());
michael@0:                 alreadyReportedShaderInfoLog = true;
michael@0:             }
michael@0: 
michael@0:             if (!alreadyReportedShaderInfoLog) {
michael@0:                 GetProgramInfoLog(program, log);
michael@0:                 if (!log.IsEmpty()) {
michael@0:                     GenerateWarning("linkProgram failed, with this log:\n%s\n",
michael@0:                                     log.get());
michael@0:                 }
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::PixelStorei(GLenum pname, GLint param)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     switch (pname) {
michael@0:         case UNPACK_FLIP_Y_WEBGL:
michael@0:             mPixelStoreFlipY = (param != 0);
michael@0:             break;
michael@0:         case UNPACK_PREMULTIPLY_ALPHA_WEBGL:
michael@0:             mPixelStorePremultiplyAlpha = (param != 0);
michael@0:             break;
michael@0:         case UNPACK_COLORSPACE_CONVERSION_WEBGL:
michael@0:             if (param == LOCAL_GL_NONE || param == BROWSER_DEFAULT_WEBGL)
michael@0:                 mPixelStoreColorspaceConversion = param;
michael@0:             else
michael@0:                 return ErrorInvalidEnumInfo("pixelStorei: colorspace conversion parameter", param);
michael@0:             break;
michael@0:         case LOCAL_GL_PACK_ALIGNMENT:
michael@0:         case LOCAL_GL_UNPACK_ALIGNMENT:
michael@0:             if (param != 1 &&
michael@0:                 param != 2 &&
michael@0:                 param != 4 &&
michael@0:                 param != 8)
michael@0:                 return ErrorInvalidValue("pixelStorei: invalid pack/unpack alignment value");
michael@0:             if (pname == LOCAL_GL_PACK_ALIGNMENT)
michael@0:                 mPixelStorePackAlignment = param;
michael@0:             else if (pname == LOCAL_GL_UNPACK_ALIGNMENT)
michael@0:                 mPixelStoreUnpackAlignment = param;
michael@0:             MakeContextCurrent();
michael@0:             gl->fPixelStorei(pname, param);
michael@0:             break;
michael@0:         default:
michael@0:             return ErrorInvalidEnumInfo("pixelStorei: parameter", pname);
michael@0:     }
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::ReadPixels(GLint x, GLint y, GLsizei width,
michael@0:                          GLsizei height, GLenum format,
michael@0:                          GLenum type, const Nullable<ArrayBufferView> &pixels,
michael@0:                          ErrorResult& rv)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (mCanvasElement->IsWriteOnly() && !nsContentUtils::IsCallerChrome()) {
michael@0:         GenerateWarning("readPixels: Not allowed");
michael@0:         return rv.Throw(NS_ERROR_DOM_SECURITY_ERR);
michael@0:     }
michael@0: 
michael@0:     if (width < 0 || height < 0)
michael@0:         return ErrorInvalidValue("readPixels: negative size passed");
michael@0: 
michael@0:     if (pixels.IsNull())
michael@0:         return ErrorInvalidValue("readPixels: null destination buffer");
michael@0: 
michael@0:     const WebGLRectangleObject* framebufferRect = CurValidFBRectObject();
michael@0:     GLsizei framebufferWidth = framebufferRect ? framebufferRect->Width() : 0;
michael@0:     GLsizei framebufferHeight = framebufferRect ? framebufferRect->Height() : 0;
michael@0: 
michael@0:     uint32_t channels = 0;
michael@0: 
michael@0:     // Check the format param
michael@0:     switch (format) {
michael@0:         case LOCAL_GL_ALPHA:
michael@0:             channels = 1;
michael@0:             break;
michael@0:         case LOCAL_GL_RGB:
michael@0:             channels = 3;
michael@0:             break;
michael@0:         case LOCAL_GL_RGBA:
michael@0:             channels = 4;
michael@0:             break;
michael@0:         default:
michael@0:             return ErrorInvalidEnum("readPixels: Bad format");
michael@0:     }
michael@0: 
michael@0:     uint32_t bytesPerPixel = 0;
michael@0:     int requiredDataType = 0;
michael@0: 
michael@0:     // Check the type param
michael@0:     bool isReadTypeValid = false;
michael@0:     bool isReadTypeFloat = false;
michael@0:     switch (type) {
michael@0:         case LOCAL_GL_UNSIGNED_BYTE:
michael@0:             isReadTypeValid = true;
michael@0:             bytesPerPixel = 1*channels;
michael@0:             requiredDataType = js::ArrayBufferView::TYPE_UINT8;
michael@0:             break;
michael@0:         case LOCAL_GL_UNSIGNED_SHORT_4_4_4_4:
michael@0:         case LOCAL_GL_UNSIGNED_SHORT_5_5_5_1:
michael@0:         case LOCAL_GL_UNSIGNED_SHORT_5_6_5:
michael@0:             isReadTypeValid = true;
michael@0:             bytesPerPixel = 2;
michael@0:             requiredDataType = js::ArrayBufferView::TYPE_UINT16;
michael@0:             break;
michael@0:         case LOCAL_GL_FLOAT:
michael@0:             if (IsExtensionEnabled(WebGLExtensionID::WEBGL_color_buffer_float) ||
michael@0:                 IsExtensionEnabled(WebGLExtensionID::EXT_color_buffer_half_float))
michael@0:             {
michael@0:                 isReadTypeValid = true;
michael@0:                 isReadTypeFloat = true;
michael@0:                 bytesPerPixel = 4*channels;
michael@0:                 requiredDataType = js::ArrayBufferView::TYPE_FLOAT32;
michael@0:             }
michael@0:             break;
michael@0:     }
michael@0:     if (!isReadTypeValid)
michael@0:         return ErrorInvalidEnum("readPixels: Bad type", type);
michael@0: 
michael@0:     const ArrayBufferView& pixbuf = pixels.Value();
michael@0:     int dataType = JS_GetArrayBufferViewType(pixbuf.Obj());
michael@0: 
michael@0:     // Check the pixels param type
michael@0:     if (dataType != requiredDataType)
michael@0:         return ErrorInvalidOperation("readPixels: Mismatched type/pixels types");
michael@0: 
michael@0:     // Check the pixels param size
michael@0:     CheckedUint32 checked_neededByteLength =
michael@0:         GetImageSize(height, width, bytesPerPixel, mPixelStorePackAlignment);
michael@0: 
michael@0:     CheckedUint32 checked_plainRowSize = CheckedUint32(width) * bytesPerPixel;
michael@0: 
michael@0:     CheckedUint32 checked_alignedRowSize =
michael@0:         RoundedToNextMultipleOf(checked_plainRowSize, mPixelStorePackAlignment);
michael@0: 
michael@0:     if (!checked_neededByteLength.isValid())
michael@0:         return ErrorInvalidOperation("readPixels: integer overflow computing the needed buffer size");
michael@0: 
michael@0:     // Compute length and data.  Don't reenter after this point, lest the
michael@0:     // precomputed go out of sync with the instant length/data.
michael@0:     pixbuf.ComputeLengthAndData();
michael@0: 
michael@0:     uint32_t dataByteLen = pixbuf.Length();
michael@0:     if (checked_neededByteLength.value() > dataByteLen)
michael@0:         return ErrorInvalidOperation("readPixels: buffer too small");
michael@0: 
michael@0:     void* data = pixbuf.Data();
michael@0:     if (!data) {
michael@0:         ErrorOutOfMemory("readPixels: buffer storage is null. Did we run out of memory?");
michael@0:         return rv.Throw(NS_ERROR_OUT_OF_MEMORY);
michael@0:     }
michael@0: 
michael@0:     bool isSourceTypeFloat = false;
michael@0:     if (mBoundFramebuffer &&
michael@0:         mBoundFramebuffer->ColorAttachmentCount() &&
michael@0:         mBoundFramebuffer->ColorAttachment(0).IsDefined())
michael@0:     {
michael@0:         isSourceTypeFloat = mBoundFramebuffer->ColorAttachment(0).IsReadableFloat();
michael@0:     }
michael@0: 
michael@0:     if (isReadTypeFloat != isSourceTypeFloat)
michael@0:         return ErrorInvalidOperation("readPixels: Invalid type floatness");
michael@0: 
michael@0:     // Check the format and type params to assure they are an acceptable pair (as per spec)
michael@0:     switch (format) {
michael@0:         case LOCAL_GL_RGBA: {
michael@0:             switch (type) {
michael@0:                 case LOCAL_GL_UNSIGNED_BYTE:
michael@0:                     break;
michael@0:                 case LOCAL_GL_FLOAT:
michael@0:                     break;
michael@0:                 default:
michael@0:                     return ErrorInvalidOperation("readPixels: Invalid format/type pair");
michael@0:             }
michael@0:             break;
michael@0:         }
michael@0:         default:
michael@0:             return ErrorInvalidOperation("readPixels: Invalid format/type pair");
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     if (mBoundFramebuffer) {
michael@0:         // prevent readback of arbitrary video memory through uninitialized renderbuffers!
michael@0:         if (!mBoundFramebuffer->CheckAndInitializeAttachments())
michael@0:             return ErrorInvalidFramebufferOperation("readPixels: incomplete framebuffer");
michael@0: 
michael@0:         GLenum readPlaneBits = LOCAL_GL_COLOR_BUFFER_BIT;
michael@0:         if (!mBoundFramebuffer->HasCompletePlanes(readPlaneBits)) {
michael@0:             return ErrorInvalidOperation("readPixels: Read source attachment doesn't have the"
michael@0:                                          " correct color/depth/stencil type.");
michael@0:         }
michael@0:     } else {
michael@0:       ClearBackbufferIfNeeded();
michael@0:     }
michael@0:     // Now that the errors are out of the way, on to actually reading
michael@0: 
michael@0:     // If we won't be reading any pixels anyways, just skip the actual reading
michael@0:     if (width == 0 || height == 0)
michael@0:         return DummyFramebufferOperation("readPixels");
michael@0: 
michael@0:     if (CanvasUtils::CheckSaneSubrectSize(x, y, width, height, framebufferWidth, framebufferHeight)) {
michael@0:         // the easy case: we're not reading out-of-range pixels
michael@0:         gl->fReadPixels(x, y, width, height, format, type, data);
michael@0:     } else {
michael@0:         // the rectangle doesn't fit entirely in the bound buffer. We then have to set to zero the part
michael@0:         // of the buffer that correspond to out-of-range pixels. We don't want to rely on system OpenGL
michael@0:         // to do that for us, because passing out of range parameters to a buggy OpenGL implementation
michael@0:         // could conceivably allow to read memory we shouldn't be allowed to read. So we manually initialize
michael@0:         // the buffer to zero and compute the parameters to pass to OpenGL. We have to use an intermediate buffer
michael@0:         // to accomodate the potentially different strides (widths).
michael@0: 
michael@0:         // Zero the whole pixel dest area in the destination buffer.
michael@0:         memset(data, 0, checked_neededByteLength.value());
michael@0: 
michael@0:         if (   x >= framebufferWidth
michael@0:             || x+width <= 0
michael@0:             || y >= framebufferHeight
michael@0:             || y+height <= 0)
michael@0:         {
michael@0:             // we are completely outside of range, can exit now with buffer filled with zeros
michael@0:             return DummyFramebufferOperation("readPixels");
michael@0:         }
michael@0: 
michael@0:         // compute the parameters of the subrect we're actually going to call glReadPixels on
michael@0:         GLint   subrect_x      = std::max(x, 0);
michael@0:         GLint   subrect_end_x  = std::min(x+width, framebufferWidth);
michael@0:         GLsizei subrect_width  = subrect_end_x - subrect_x;
michael@0: 
michael@0:         GLint   subrect_y      = std::max(y, 0);
michael@0:         GLint   subrect_end_y  = std::min(y+height, framebufferHeight);
michael@0:         GLsizei subrect_height = subrect_end_y - subrect_y;
michael@0: 
michael@0:         if (subrect_width < 0 || subrect_height < 0 ||
michael@0:             subrect_width > width || subrect_height > height)
michael@0:             return ErrorInvalidOperation("readPixels: integer overflow computing clipped rect size");
michael@0: 
michael@0:         // now we know that subrect_width is in the [0..width] interval, and same for heights.
michael@0: 
michael@0:         // now, same computation as above to find the size of the intermediate buffer to allocate for the subrect
michael@0:         // no need to check again for integer overflow here, since we already know the sizes aren't greater than before
michael@0:         uint32_t subrect_plainRowSize = subrect_width * bytesPerPixel;
michael@0:     // There are checks above to ensure that this doesn't overflow.
michael@0:         uint32_t subrect_alignedRowSize =
michael@0:             RoundedToNextMultipleOf(subrect_plainRowSize, mPixelStorePackAlignment).value();
michael@0:         uint32_t subrect_byteLength = (subrect_height-1)*subrect_alignedRowSize + subrect_plainRowSize;
michael@0: 
michael@0:         // create subrect buffer, call glReadPixels, copy pixels into destination buffer, delete subrect buffer
michael@0:         GLubyte *subrect_data = new GLubyte[subrect_byteLength];
michael@0:         gl->fReadPixels(subrect_x, subrect_y, subrect_width, subrect_height, format, type, subrect_data);
michael@0: 
michael@0:         // notice that this for loop terminates because we already checked that subrect_height is at most height
michael@0:         for (GLint y_inside_subrect = 0; y_inside_subrect < subrect_height; ++y_inside_subrect) {
michael@0:             GLint subrect_x_in_dest_buffer = subrect_x - x;
michael@0:             GLint subrect_y_in_dest_buffer = subrect_y - y;
michael@0:             memcpy(static_cast<GLubyte*>(data)
michael@0:                      + checked_alignedRowSize.value() * (subrect_y_in_dest_buffer + y_inside_subrect)
michael@0:                      + bytesPerPixel * subrect_x_in_dest_buffer, // destination
michael@0:                    subrect_data + subrect_alignedRowSize * y_inside_subrect, // source
michael@0:                    subrect_plainRowSize); // size
michael@0:         }
michael@0:         delete [] subrect_data;
michael@0:     }
michael@0: 
michael@0:     // if we're reading alpha, we may need to do fixup.  Note that we don't allow
michael@0:     // GL_ALPHA to readpixels currently, but we had the code written for it already.
michael@0:     if (format == LOCAL_GL_ALPHA ||
michael@0:         format == LOCAL_GL_RGBA)
michael@0:     {
michael@0:         bool needAlphaFixup;
michael@0:         if (mBoundFramebuffer) {
michael@0:             needAlphaFixup = !mBoundFramebuffer->ColorAttachment(0).HasAlpha();
michael@0:         } else {
michael@0:             needAlphaFixup = gl->GetPixelFormat().alpha == 0;
michael@0:         }
michael@0: 
michael@0:         if (needAlphaFixup) {
michael@0:             if (format == LOCAL_GL_ALPHA && type == LOCAL_GL_UNSIGNED_BYTE) {
michael@0:                 // this is easy; it's an 0xff memset per row
michael@0:                 uint8_t *row = static_cast<uint8_t*>(data);
michael@0:                 for (GLint j = 0; j < height; ++j) {
michael@0:                     memset(row, 0xff, checked_plainRowSize.value());
michael@0:                     row += checked_alignedRowSize.value();
michael@0:                 }
michael@0:             } else if (format == LOCAL_GL_RGBA && type == LOCAL_GL_UNSIGNED_BYTE) {
michael@0:                 // this is harder, we need to just set the alpha byte here
michael@0:                 uint8_t *row = static_cast<uint8_t*>(data);
michael@0:                 for (GLint j = 0; j < height; ++j) {
michael@0:                     uint8_t *rowp = row;
michael@0: #if MOZ_LITTLE_ENDIAN
michael@0:                     // offset to get the alpha byte; we're always going to
michael@0:                     // move by 4 bytes
michael@0:                     rowp += 3;
michael@0: #endif
michael@0:                     uint8_t *endrowp = rowp + 4 * width;
michael@0:                     while (rowp != endrowp) {
michael@0:                         *rowp = 0xff;
michael@0:                         rowp += 4;
michael@0:                     }
michael@0: 
michael@0:                     row += checked_alignedRowSize.value();
michael@0:                 }
michael@0:             } else if (format == LOCAL_GL_RGBA && type == LOCAL_GL_FLOAT) {
michael@0:                 float* row = static_cast<float*>(data);
michael@0: 
michael@0:                 for (GLint j = 0; j < height; ++j) {
michael@0:                     float* pAlpha = row + 3;
michael@0:                     float* pAlphaEnd = pAlpha + 4*width;
michael@0: 
michael@0:                     while (pAlpha != pAlphaEnd) {
michael@0:                         *pAlpha = 1.0f;
michael@0:                         pAlpha += 4;
michael@0:                     }
michael@0: 
michael@0:                     row += checked_alignedRowSize.value();
michael@0:                 }
michael@0:             } else {
michael@0:                 NS_WARNING("Unhandled case, how'd we get here?");
michael@0:                 return rv.Throw(NS_ERROR_FAILURE);
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::RenderbufferStorage(GLenum target, GLenum internalformat, GLsizei width, GLsizei height)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!mBoundRenderbuffer)
michael@0:         return ErrorInvalidOperation("renderbufferStorage called on renderbuffer 0");
michael@0: 
michael@0:     if (target != LOCAL_GL_RENDERBUFFER)
michael@0:         return ErrorInvalidEnumInfo("renderbufferStorage: target", target);
michael@0: 
michael@0:     if (width < 0 || height < 0)
michael@0:         return ErrorInvalidValue("renderbufferStorage: width and height must be >= 0");
michael@0: 
michael@0:     if (width > mGLMaxRenderbufferSize || height > mGLMaxRenderbufferSize)
michael@0:         return ErrorInvalidValue("renderbufferStorage: width or height exceeds maximum renderbuffer size");
michael@0: 
michael@0:     // certain OpenGL ES renderbuffer formats may not exist on desktop OpenGL
michael@0:     GLenum internalformatForGL = internalformat;
michael@0: 
michael@0:     switch (internalformat) {
michael@0:     case LOCAL_GL_RGBA4:
michael@0:     case LOCAL_GL_RGB5_A1:
michael@0:         // 16-bit RGBA formats are not supported on desktop GL
michael@0:         if (!gl->IsGLES()) internalformatForGL = LOCAL_GL_RGBA8;
michael@0:         break;
michael@0:     case LOCAL_GL_RGB565:
michael@0:         // the RGB565 format is not supported on desktop GL
michael@0:         if (!gl->IsGLES()) internalformatForGL = LOCAL_GL_RGB8;
michael@0:         break;
michael@0:     case LOCAL_GL_DEPTH_COMPONENT16:
michael@0:         if (!gl->IsGLES() || gl->IsExtensionSupported(gl::GLContext::OES_depth24))
michael@0:             internalformatForGL = LOCAL_GL_DEPTH_COMPONENT24;
michael@0:         else if (gl->IsExtensionSupported(gl::GLContext::OES_packed_depth_stencil))
michael@0:             internalformatForGL = LOCAL_GL_DEPTH24_STENCIL8;
michael@0:         break;
michael@0:     case LOCAL_GL_STENCIL_INDEX8:
michael@0:         break;
michael@0:     case LOCAL_GL_DEPTH_STENCIL:
michael@0:         // We emulate this in WebGLRenderbuffer if we don't have the requisite extension.
michael@0:         internalformatForGL = LOCAL_GL_DEPTH24_STENCIL8;
michael@0:         break;
michael@0:     case LOCAL_GL_SRGB8_ALPHA8_EXT:
michael@0:         break;
michael@0:     case LOCAL_GL_RGB16F:
michael@0:     case LOCAL_GL_RGBA16F: {
michael@0:         bool hasExtensions = IsExtensionEnabled(WebGLExtensionID::OES_texture_half_float) &&
michael@0:                              IsExtensionEnabled(WebGLExtensionID::EXT_color_buffer_half_float);
michael@0:         if (!hasExtensions)
michael@0:             return ErrorInvalidEnumInfo("renderbufferStorage: internalformat", target);
michael@0:         break;
michael@0:     }
michael@0:     case LOCAL_GL_RGB32F:
michael@0:     case LOCAL_GL_RGBA32F: {
michael@0:         bool hasExtensions = IsExtensionEnabled(WebGLExtensionID::OES_texture_float) &&
michael@0:                              IsExtensionEnabled(WebGLExtensionID::WEBGL_color_buffer_float);
michael@0:         if (!hasExtensions)
michael@0:             return ErrorInvalidEnumInfo("renderbufferStorage: internalformat", target);
michael@0:         break;
michael@0:     }
michael@0:     default:
michael@0:         return ErrorInvalidEnumInfo("renderbufferStorage: internalformat", internalformat);
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     bool sizeChanges = width != mBoundRenderbuffer->Width() ||
michael@0:                        height != mBoundRenderbuffer->Height() ||
michael@0:                        internalformat != mBoundRenderbuffer->InternalFormat();
michael@0:     if (sizeChanges) {
michael@0:         // Invalidate framebuffer status cache
michael@0:         mBoundRenderbuffer->NotifyFBsStatusChanged();
michael@0:         GetAndFlushUnderlyingGLErrors();
michael@0:         mBoundRenderbuffer->RenderbufferStorage(internalformatForGL, width, height);
michael@0:         GLenum error = GetAndFlushUnderlyingGLErrors();
michael@0:         if (error) {
michael@0:             GenerateWarning("renderbufferStorage generated error %s", ErrorName(error));
michael@0:             return;
michael@0:         }
michael@0:     } else {
michael@0:         mBoundRenderbuffer->RenderbufferStorage(internalformatForGL, width, height);
michael@0:     }
michael@0: 
michael@0:     mBoundRenderbuffer->SetInternalFormat(internalformat);
michael@0:     mBoundRenderbuffer->SetInternalFormatForGL(internalformatForGL);
michael@0:     mBoundRenderbuffer->setDimensions(width, height);
michael@0:     mBoundRenderbuffer->SetImageDataStatus(WebGLImageDataStatus::UninitializedImageData);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Scissor(GLint x, GLint y, GLsizei width, GLsizei height)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (width < 0 || height < 0)
michael@0:         return ErrorInvalidValue("scissor: negative size");
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fScissor(x, y, width, height);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::StencilFunc(GLenum func, GLint ref, GLuint mask)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateComparisonEnum(func, "stencilFunc: func"))
michael@0:         return;
michael@0: 
michael@0:     mStencilRefFront = ref;
michael@0:     mStencilRefBack = ref;
michael@0:     mStencilValueMaskFront = mask;
michael@0:     mStencilValueMaskBack = mask;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fStencilFunc(func, ref, mask);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateFaceEnum(face, "stencilFuncSeparate: face") ||
michael@0:         !ValidateComparisonEnum(func, "stencilFuncSeparate: func"))
michael@0:         return;
michael@0: 
michael@0:     switch (face) {
michael@0:         case LOCAL_GL_FRONT_AND_BACK:
michael@0:             mStencilRefFront = ref;
michael@0:             mStencilRefBack = ref;
michael@0:             mStencilValueMaskFront = mask;
michael@0:             mStencilValueMaskBack = mask;
michael@0:             break;
michael@0:         case LOCAL_GL_FRONT:
michael@0:             mStencilRefFront = ref;
michael@0:             mStencilValueMaskFront = mask;
michael@0:             break;
michael@0:         case LOCAL_GL_BACK:
michael@0:             mStencilRefBack = ref;
michael@0:             mStencilValueMaskBack = mask;
michael@0:             break;
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fStencilFuncSeparate(face, func, ref, mask);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::StencilOp(GLenum sfail, GLenum dpfail, GLenum dppass)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateStencilOpEnum(sfail, "stencilOp: sfail") ||
michael@0:         !ValidateStencilOpEnum(dpfail, "stencilOp: dpfail") ||
michael@0:         !ValidateStencilOpEnum(dppass, "stencilOp: dppass"))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fStencilOp(sfail, dpfail, dppass);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::StencilOpSeparate(GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateFaceEnum(face, "stencilOpSeparate: face") ||
michael@0:         !ValidateStencilOpEnum(sfail, "stencilOpSeparate: sfail") ||
michael@0:         !ValidateStencilOpEnum(dpfail, "stencilOpSeparate: dpfail") ||
michael@0:         !ValidateStencilOpEnum(dppass, "stencilOpSeparate: dppass"))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fStencilOpSeparate(face, sfail, dpfail, dppass);
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: WebGLContext::SurfaceFromElementResultToImageSurface(nsLayoutUtils::SurfaceFromElementResult& res,
michael@0:                                                      RefPtr<DataSourceSurface>& imageOut, WebGLTexelFormat *format)
michael@0: {
michael@0:    *format = WebGLTexelFormat::None;
michael@0: 
michael@0:     if (!res.mSourceSurface)
michael@0:         return NS_OK;
michael@0:     RefPtr<DataSourceSurface> data = res.mSourceSurface->GetDataSurface();
michael@0:     if (!data) {
michael@0:         // SurfaceFromElement lied!
michael@0:         return NS_OK;
michael@0:     }
michael@0: 
michael@0:     if (!mPixelStorePremultiplyAlpha && res.mIsPremultiplied) {
michael@0:       data = gfxUtils::UnpremultiplyDataSurface(data);
michael@0:     }
michael@0: 
michael@0:     // We disallow loading cross-domain images and videos that have not been validated
michael@0:     // with CORS as WebGL textures. The reason for doing that is that timing
michael@0:     // attacks on WebGL shaders are able to retrieve approximations of the
michael@0:     // pixel values in WebGL textures; see bug 655987.
michael@0:     //
michael@0:     // To prevent a loophole where a Canvas2D would be used as a proxy to load
michael@0:     // cross-domain textures, we also disallow loading textures from write-only
michael@0:     // Canvas2D's.
michael@0: 
michael@0:     // part 1: check that the DOM element is same-origin, or has otherwise been
michael@0:     // validated for cross-domain use.
michael@0:     if (!res.mCORSUsed) {
michael@0:         bool subsumes;
michael@0:         nsresult rv = mCanvasElement->NodePrincipal()->Subsumes(res.mPrincipal, &subsumes);
michael@0:         if (NS_FAILED(rv) || !subsumes) {
michael@0:             GenerateWarning("It is forbidden to load a WebGL texture from a cross-domain element that has not been validated with CORS. "
michael@0:                                 "See https://developer.mozilla.org/en/WebGL/Cross-Domain_Textures");
michael@0:             return NS_ERROR_DOM_SECURITY_ERR;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     // part 2: if the DOM element is write-only, it might contain
michael@0:     // cross-domain image data.
michael@0:     if (res.mIsWriteOnly) {
michael@0:         GenerateWarning("The canvas used as source for texImage2D here is tainted (write-only). It is forbidden "
michael@0:                         "to load a WebGL texture from a tainted canvas. A Canvas becomes tainted for example "
michael@0:                         "when a cross-domain image is drawn on it. "
michael@0:                         "See https://developer.mozilla.org/en/WebGL/Cross-Domain_Textures");
michael@0:         return NS_ERROR_DOM_SECURITY_ERR;
michael@0:     }
michael@0: 
michael@0:     // End of security checks, now we should be safe regarding cross-domain images
michael@0:     // Notice that there is never a need to mark the WebGL canvas as write-only, since we reject write-only/cross-domain
michael@0:     // texture sources in the first place.
michael@0: 
michael@0:     switch (data->GetFormat()) {
michael@0:         case SurfaceFormat::B8G8R8A8:
michael@0:             *format = WebGLTexelFormat::BGRA8; // careful, our ARGB means BGRA
michael@0:             break;
michael@0:         case SurfaceFormat::B8G8R8X8:
michael@0:             *format = WebGLTexelFormat::BGRX8; // careful, our RGB24 is not tightly packed. Whence BGRX8.
michael@0:             break;
michael@0:         case SurfaceFormat::A8:
michael@0:             *format = WebGLTexelFormat::A8;
michael@0:             break;
michael@0:         case SurfaceFormat::R5G6B5:
michael@0:             *format = WebGLTexelFormat::RGB565;
michael@0:             break;
michael@0:         default:
michael@0:             NS_ASSERTION(false, "Unsupported image format. Unimplemented.");
michael@0:             return NS_ERROR_NOT_IMPLEMENTED;
michael@0:     }
michael@0: 
michael@0:     imageOut = data;
michael@0: 
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: 
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform1i(WebGLUniformLocation *location_object, GLint a1)
michael@0: {
michael@0:     GLint location;
michael@0:     if (!ValidateUniformSetter("Uniform1i", location_object, location))
michael@0:         return;
michael@0: 
michael@0:     // Only uniform1i can take sampler settings.
michael@0:     if (!ValidateSamplerUniformSetter("Uniform1i", location_object, a1))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform1i(location, a1);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform2i(WebGLUniformLocation *location_object, GLint a1,
michael@0:                         GLint a2)
michael@0: {
michael@0:     GLint location;
michael@0:     if (!ValidateUniformSetter("Uniform2i", location_object, location))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform2i(location, a1, a2);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform3i(WebGLUniformLocation *location_object, GLint a1,
michael@0:                         GLint a2, GLint a3)
michael@0: {
michael@0:     GLint location;
michael@0:     if (!ValidateUniformSetter("Uniform3i", location_object, location))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform3i(location, a1, a2, a3);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform4i(WebGLUniformLocation *location_object, GLint a1,
michael@0:                         GLint a2, GLint a3, GLint a4)
michael@0: {
michael@0:     GLint location;
michael@0:     if (!ValidateUniformSetter("Uniform4i", location_object, location))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform4i(location, a1, a2, a3, a4);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform1f(WebGLUniformLocation *location_object, GLfloat a1)
michael@0: {
michael@0:     GLint location;
michael@0:     if (!ValidateUniformSetter("Uniform1f", location_object, location))
michael@0:         return;
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform1f(location, a1);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform2f(WebGLUniformLocation *location_object, GLfloat a1,
michael@0:                         GLfloat a2)
michael@0: {
michael@0:     GLint location;
michael@0:     if (!ValidateUniformSetter("Uniform2f", location_object, location))
michael@0:         return;
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform2f(location, a1, a2);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform3f(WebGLUniformLocation *location_object, GLfloat a1,
michael@0:                         GLfloat a2, GLfloat a3)
michael@0: {
michael@0:     GLint location;
michael@0:     if (!ValidateUniformSetter("Uniform3f", location_object, location))
michael@0:         return;
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform3f(location, a1, a2, a3);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform4f(WebGLUniformLocation *location_object, GLfloat a1,
michael@0:                         GLfloat a2, GLfloat a3, GLfloat a4)
michael@0: {
michael@0:     GLint location;
michael@0:     if (!ValidateUniformSetter("Uniform4f", location_object, location))
michael@0:         return;
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform4f(location, a1, a2, a3, a4);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform1iv_base(WebGLUniformLocation *location_object,
michael@0:                               uint32_t arrayLength, const GLint* data)
michael@0: {
michael@0:     uint32_t numElementsToUpload;
michael@0:     GLint location;
michael@0:     if (!ValidateUniformArraySetter("Uniform1iv", 1, location_object, location,
michael@0:                                     numElementsToUpload, arrayLength)) {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (!ValidateSamplerUniformSetter("Uniform1iv", location_object, data[0]))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform1iv(location, numElementsToUpload, data);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform2iv_base(WebGLUniformLocation *location_object,
michael@0:                               uint32_t arrayLength, const GLint* data)
michael@0: {
michael@0:     uint32_t numElementsToUpload;
michael@0:     GLint location;
michael@0:     if (!ValidateUniformArraySetter("Uniform2iv", 2, location_object, location,
michael@0:                                     numElementsToUpload, arrayLength)) {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (!ValidateSamplerUniformSetter("Uniform2iv", location_object, data[0]) ||
michael@0:         !ValidateSamplerUniformSetter("Uniform2iv", location_object, data[1]))
michael@0:     {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform2iv(location, numElementsToUpload, data);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform3iv_base(WebGLUniformLocation *location_object,
michael@0:                               uint32_t arrayLength, const GLint* data)
michael@0: {
michael@0:     uint32_t numElementsToUpload;
michael@0:     GLint location;
michael@0:     if (!ValidateUniformArraySetter("Uniform3iv", 3, location_object, location,
michael@0:                                     numElementsToUpload, arrayLength)) {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (!ValidateSamplerUniformSetter("Uniform3iv", location_object, data[0]) ||
michael@0:         !ValidateSamplerUniformSetter("Uniform3iv", location_object, data[1]) ||
michael@0:         !ValidateSamplerUniformSetter("Uniform3iv", location_object, data[2]))
michael@0:     {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform3iv(location, numElementsToUpload, data);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform4iv_base(WebGLUniformLocation *location_object,
michael@0:                               uint32_t arrayLength, const GLint* data)
michael@0: {
michael@0:     uint32_t numElementsToUpload;
michael@0:     GLint location;
michael@0:     if (!ValidateUniformArraySetter("Uniform4iv", 4, location_object, location,
michael@0:                                     numElementsToUpload, arrayLength)) {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (!ValidateSamplerUniformSetter("Uniform4iv", location_object, data[0]) ||
michael@0:         !ValidateSamplerUniformSetter("Uniform4iv", location_object, data[1]) ||
michael@0:         !ValidateSamplerUniformSetter("Uniform4iv", location_object, data[2]) ||
michael@0:         !ValidateSamplerUniformSetter("Uniform4iv", location_object, data[3]))
michael@0:     {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform4iv(location, numElementsToUpload, data);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform1fv_base(WebGLUniformLocation *location_object,
michael@0:                               uint32_t arrayLength, const GLfloat* data)
michael@0: {
michael@0:     uint32_t numElementsToUpload;
michael@0:     GLint location;
michael@0:     if (!ValidateUniformArraySetter("Uniform1fv", 1, location_object, location,
michael@0:                                     numElementsToUpload, arrayLength)) {
michael@0:         return;
michael@0:     }
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform1fv(location, numElementsToUpload, data);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform2fv_base(WebGLUniformLocation *location_object,
michael@0:                               uint32_t arrayLength, const GLfloat* data)
michael@0: {
michael@0:     uint32_t numElementsToUpload;
michael@0:     GLint location;
michael@0:     if (!ValidateUniformArraySetter("Uniform2fv", 2, location_object, location,
michael@0:                                     numElementsToUpload, arrayLength)) {
michael@0:         return;
michael@0:     }
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform2fv(location, numElementsToUpload, data);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform3fv_base(WebGLUniformLocation *location_object,
michael@0:                               uint32_t arrayLength, const GLfloat* data)
michael@0: {
michael@0:     uint32_t numElementsToUpload;
michael@0:     GLint location;
michael@0:     if (!ValidateUniformArraySetter("Uniform3fv", 3, location_object, location,
michael@0:                                     numElementsToUpload, arrayLength)) {
michael@0:         return;
michael@0:     }
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform3fv(location, numElementsToUpload, data);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Uniform4fv_base(WebGLUniformLocation *location_object,
michael@0:                               uint32_t arrayLength, const GLfloat* data)
michael@0: {
michael@0:     uint32_t numElementsToUpload;
michael@0:     GLint location;
michael@0:     if (!ValidateUniformArraySetter("Uniform4fv", 4, location_object, location,
michael@0:                                     numElementsToUpload, arrayLength)) {
michael@0:         return;
michael@0:     }
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniform4fv(location, numElementsToUpload, data);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::UniformMatrix2fv_base(WebGLUniformLocation* location_object,
michael@0:                                     WebGLboolean aTranspose, uint32_t arrayLength,
michael@0:                                     const float* data)
michael@0: {
michael@0:     uint32_t numElementsToUpload;
michael@0:     GLint location;
michael@0:     if (!ValidateUniformMatrixArraySetter("UniformMatrix2fv", 2, location_object, location,
michael@0:                                          numElementsToUpload, arrayLength, aTranspose)) {
michael@0:         return;
michael@0:     }
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniformMatrix2fv(location, numElementsToUpload, false, data);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::UniformMatrix3fv_base(WebGLUniformLocation* location_object,
michael@0:                                     WebGLboolean aTranspose, uint32_t arrayLength,
michael@0:                                     const float* data)
michael@0: {
michael@0:     uint32_t numElementsToUpload;
michael@0:     GLint location;
michael@0:     if (!ValidateUniformMatrixArraySetter("UniformMatrix3fv", 3, location_object, location,
michael@0:                                          numElementsToUpload, arrayLength, aTranspose)) {
michael@0:         return;
michael@0:     }
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniformMatrix3fv(location, numElementsToUpload, false, data);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::UniformMatrix4fv_base(WebGLUniformLocation* location_object,
michael@0:                                     WebGLboolean aTranspose, uint32_t arrayLength,
michael@0:                                     const float* data)
michael@0: {
michael@0:     uint32_t numElementsToUpload;
michael@0:     GLint location;
michael@0:     if (!ValidateUniformMatrixArraySetter("UniformMatrix4fv", 4, location_object, location,
michael@0:                                          numElementsToUpload, arrayLength, aTranspose)) {
michael@0:         return;
michael@0:     }
michael@0:     MakeContextCurrent();
michael@0:     gl->fUniformMatrix4fv(location, numElementsToUpload, false, data);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::UseProgram(WebGLProgram *prog)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObjectAllowNull("useProgram", prog))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     InvalidateBufferFetching();
michael@0: 
michael@0:     GLuint progname = prog ? prog->GLName() : 0;
michael@0: 
michael@0:     if (prog && !prog->LinkStatus())
michael@0:         return ErrorInvalidOperation("useProgram: program was not linked successfully");
michael@0: 
michael@0:     gl->fUseProgram(progname);
michael@0: 
michael@0:     mCurrentProgram = prog;
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::ValidateProgram(WebGLProgram *prog)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObject("validateProgram", prog))
michael@0:         return;
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0: #ifdef XP_MACOSX
michael@0:     // see bug 593867 for NVIDIA and bug 657201 for ATI. The latter is confirmed with Mac OS 10.6.7
michael@0:     if (gl->WorkAroundDriverBugs()) {
michael@0:         GenerateWarning("validateProgram: implemented as a no-operation on Mac to work around crashes");
michael@0:         return;
michael@0:     }
michael@0: #endif
michael@0: 
michael@0:     GLuint progname = prog->GLName();
michael@0:     gl->fValidateProgram(progname);
michael@0: }
michael@0: 
michael@0: already_AddRefed<WebGLFramebuffer>
michael@0: WebGLContext::CreateFramebuffer()
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return nullptr;
michael@0:     nsRefPtr<WebGLFramebuffer> globj = new WebGLFramebuffer(this);
michael@0:     return globj.forget();
michael@0: }
michael@0: 
michael@0: already_AddRefed<WebGLRenderbuffer>
michael@0: WebGLContext::CreateRenderbuffer()
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return nullptr;
michael@0:     nsRefPtr<WebGLRenderbuffer> globj = new WebGLRenderbuffer(this);
michael@0:     return globj.forget();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Viewport(GLint x, GLint y, GLsizei width, GLsizei height)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (width < 0 || height < 0)
michael@0:         return ErrorInvalidValue("viewport: negative size");
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fViewport(x, y, width, height);
michael@0: 
michael@0:     mViewportX = x;
michael@0:     mViewportY = y;
michael@0:     mViewportWidth = width;
michael@0:     mViewportHeight = height;
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::CompileShader(WebGLShader *shader)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObject("compileShader", shader))
michael@0:         return;
michael@0: 
michael@0:     GLuint shadername = shader->GLName();
michael@0: 
michael@0:     shader->SetCompileStatus(false);
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     ShShaderOutput targetShaderSourceLanguage = gl->IsGLES() ? SH_ESSL_OUTPUT : SH_GLSL_OUTPUT;
michael@0:     bool useShaderSourceTranslation = true;
michael@0: 
michael@0:     if (shader->NeedsTranslation() && mShaderValidation) {
michael@0:         ShHandle compiler = 0;
michael@0:         ShBuiltInResources resources;
michael@0:         memset(&resources, 0, sizeof(ShBuiltInResources));
michael@0: 
michael@0:         resources.MaxVertexAttribs = mGLMaxVertexAttribs;
michael@0:         resources.MaxVertexUniformVectors = mGLMaxVertexUniformVectors;
michael@0:         resources.MaxVaryingVectors = mGLMaxVaryingVectors;
michael@0:         resources.MaxVertexTextureImageUnits = mGLMaxVertexTextureImageUnits;
michael@0:         resources.MaxCombinedTextureImageUnits = mGLMaxTextureUnits;
michael@0:         resources.MaxTextureImageUnits = mGLMaxTextureImageUnits;
michael@0:         resources.MaxFragmentUniformVectors = mGLMaxFragmentUniformVectors;
michael@0:         resources.MaxDrawBuffers = mGLMaxDrawBuffers;
michael@0: 
michael@0:         if (IsExtensionEnabled(WebGLExtensionID::EXT_frag_depth))
michael@0:             resources.EXT_frag_depth = 1;
michael@0: 
michael@0:         if (IsExtensionEnabled(WebGLExtensionID::OES_standard_derivatives))
michael@0:             resources.OES_standard_derivatives = 1;
michael@0: 
michael@0:         if (IsExtensionEnabled(WebGLExtensionID::WEBGL_draw_buffers))
michael@0:             resources.EXT_draw_buffers = 1;
michael@0: 
michael@0:         // Tell ANGLE to allow highp in frag shaders. (unless disabled)
michael@0:         // If underlying GLES doesn't have highp in frag shaders, it should complain anyways.
michael@0:         resources.FragmentPrecisionHigh = mDisableFragHighP ? 0 : 1;
michael@0: 
michael@0:         if (gl->WorkAroundDriverBugs()) {
michael@0: #ifdef XP_MACOSX
michael@0:             if (gl->Vendor() == gl::GLVendor::NVIDIA) {
michael@0:                 // Work around bug 890432
michael@0:                 resources.MaxExpressionComplexity = 1000;
michael@0:             }
michael@0: #endif
michael@0:         }
michael@0: 
michael@0:         // We're storing an actual instance of StripComments because, if we don't, the
michael@0:         // cleanSource nsAString instance will be destroyed before the reference is
michael@0:         // actually used.
michael@0:         StripComments stripComments(shader->Source());
michael@0:         const nsAString& cleanSource = Substring(stripComments.result().Elements(), stripComments.length());
michael@0:         if (!ValidateGLSLString(cleanSource, "compileShader"))
michael@0:             return;
michael@0: 
michael@0:         // shaderSource() already checks that the source stripped of comments is in the
michael@0:         // 7-bit ASCII range, so we can skip the NS_IsAscii() check.
michael@0:         NS_LossyConvertUTF16toASCII sourceCString(cleanSource);
michael@0: 
michael@0:         if (gl->WorkAroundDriverBugs()) {
michael@0:             const uint32_t maxSourceLength = 0x3ffff;
michael@0:             if (sourceCString.Length() > maxSourceLength)
michael@0:                 return ErrorInvalidValue("compileShader: source has more than %d characters",
michael@0:                                          maxSourceLength);
michael@0:         }
michael@0: 
michael@0:         const char *s = sourceCString.get();
michael@0: 
michael@0: #define WEBGL2_BYPASS_ANGLE
michael@0: #ifdef WEBGL2_BYPASS_ANGLE
michael@0:         /*
michael@0:          * The bypass don't bring a full support for GLSL ES 3.0, but the main purpose
michael@0:          * is to natively bring gl_InstanceID (to do instanced rendering) and gl_FragData
michael@0:          *
michael@0:          * To remove the bypass code, just comment #define WEBGL2_BYPASS_ANGLE above
michael@0:          *
michael@0:          * To bypass angle, the context must be a WebGL 2 and the shader must have the
michael@0:          * following line at the very top :
michael@0:          *      #version proto-200
michael@0:          *
michael@0:          * In this case, byPassANGLE == true and here is what we do :
michael@0:          *  We create two shader source code:
michael@0:          *    - one for the driver, that enable GL_EXT_gpu_shader4
michael@0:          *    - one for the angle compilor, to get informations about vertex attributes
michael@0:          *      and uniforms
michael@0:          */
michael@0:         static const char *bypassPrefixSearch = "#version proto-200";
michael@0:         static const char *bypassANGLEPrefix[2] = {"precision mediump float;\n"
michael@0:                                                    "#define gl_VertexID 0\n"
michael@0:                                                    "#define gl_InstanceID 0\n",
michael@0: 
michael@0:                                                    "precision mediump float;\n"
michael@0:                                                    "#extension GL_EXT_draw_buffers : enable\n"
michael@0:                                                    "#define gl_PrimitiveID 0\n"};
michael@0: 
michael@0:         const bool bypassANGLE = IsWebGL2() && (strstr(s, bypassPrefixSearch) != 0);
michael@0: 
michael@0:         const char *angleShaderCode = s;
michael@0:         nsTArray<char> bypassANGLEShaderCode;
michael@0:         nsTArray<char> bypassDriverShaderCode;
michael@0: 
michael@0:         if (bypassANGLE) {
michael@0:             const int bypassStage = (shader->ShaderType() == LOCAL_GL_FRAGMENT_SHADER) ? 1 : 0;
michael@0:             const char *originalShader = strstr(s, bypassPrefixSearch) + strlen(bypassPrefixSearch);
michael@0:             int originalShaderSize = strlen(s) - (originalShader - s);
michael@0:             int bypassShaderCodeSize = originalShaderSize + 4096 + 1;
michael@0: 
michael@0:             bypassANGLEShaderCode.SetLength(bypassShaderCodeSize);
michael@0:             strcpy(bypassANGLEShaderCode.Elements(), bypassANGLEPrefix[bypassStage]);
michael@0:             strcat(bypassANGLEShaderCode.Elements(), originalShader);
michael@0: 
michael@0:             bypassDriverShaderCode.SetLength(bypassShaderCodeSize);
michael@0:             strcpy(bypassDriverShaderCode.Elements(), "#extension GL_EXT_gpu_shader4 : enable\n");
michael@0:             strcat(bypassDriverShaderCode.Elements(), originalShader);
michael@0: 
michael@0:             angleShaderCode = bypassANGLEShaderCode.Elements();
michael@0:         }
michael@0: #endif
michael@0: 
michael@0:         compiler = ShConstructCompiler((ShShaderType) shader->ShaderType(),
michael@0:                                        SH_WEBGL_SPEC,
michael@0:                                        targetShaderSourceLanguage,
michael@0:                                        &resources);
michael@0: 
michael@0:         int compileOptions = SH_ATTRIBUTES_UNIFORMS |
michael@0:                              SH_ENFORCE_PACKING_RESTRICTIONS;
michael@0: 
michael@0:         if (resources.MaxExpressionComplexity > 0) {
michael@0:             compileOptions |= SH_LIMIT_EXPRESSION_COMPLEXITY;
michael@0:         }
michael@0: 
michael@0:         // We want to do this everywhere, but:
michael@0: #ifndef XP_MACOSX // To do this on Mac, we need to do it only on Mac OSX > 10.6 as this
michael@0:                   // causes the shader compiler in 10.6 to crash
michael@0:         compileOptions |= SH_CLAMP_INDIRECT_ARRAY_BOUNDS;
michael@0: #endif
michael@0: 
michael@0:         if (useShaderSourceTranslation) {
michael@0:             compileOptions |= SH_OBJECT_CODE
michael@0:                             | SH_MAP_LONG_VARIABLE_NAMES;
michael@0: 
michael@0: #ifdef XP_MACOSX
michael@0:             if (gl->WorkAroundDriverBugs()) {
michael@0:                 // Work around bug 665578 and bug 769810
michael@0:                 if (gl->Vendor() == gl::GLVendor::ATI) {
michael@0:                     compileOptions |= SH_EMULATE_BUILT_IN_FUNCTIONS;
michael@0:                 }
michael@0: 
michael@0:                 // Work around bug 735560
michael@0:                 if (gl->Vendor() == gl::GLVendor::Intel) {
michael@0:                     compileOptions |= SH_EMULATE_BUILT_IN_FUNCTIONS;
michael@0:                 }
michael@0:             }
michael@0: #endif
michael@0:         }
michael@0: 
michael@0: #ifdef WEBGL2_BYPASS_ANGLE
michael@0:         if (!ShCompile(compiler, &angleShaderCode, 1, compileOptions)) {
michael@0: #else
michael@0:         if (!ShCompile(compiler, &s, 1, compileOptions)) {
michael@0: #endif
michael@0:             size_t lenWithNull = 0;
michael@0:             ShGetInfo(compiler, SH_INFO_LOG_LENGTH, &lenWithNull);
michael@0: 
michael@0:             if (!lenWithNull) {
michael@0:                 // Error in ShGetInfo.
michael@0:                 shader->SetTranslationFailure(NS_LITERAL_CSTRING("Internal error: failed to get shader info log"));
michael@0:             } else {
michael@0:                 size_t len = lenWithNull - 1;
michael@0: 
michael@0:                 nsAutoCString info;
michael@0:                 info.SetLength(len); // Allocates len+1, for the null-term.
michael@0:                 ShGetInfoLog(compiler, info.BeginWriting());
michael@0: 
michael@0:                 shader->SetTranslationFailure(info);
michael@0:             }
michael@0:             ShDestruct(compiler);
michael@0:             shader->SetCompileStatus(false);
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         size_t num_attributes = 0;
michael@0:         ShGetInfo(compiler, SH_ACTIVE_ATTRIBUTES, &num_attributes);
michael@0:         size_t num_uniforms = 0;
michael@0:         ShGetInfo(compiler, SH_ACTIVE_UNIFORMS, &num_uniforms);
michael@0:         size_t attrib_max_length = 0;
michael@0:         ShGetInfo(compiler, SH_ACTIVE_ATTRIBUTE_MAX_LENGTH, &attrib_max_length);
michael@0:         size_t uniform_max_length = 0;
michael@0:         ShGetInfo(compiler, SH_ACTIVE_UNIFORM_MAX_LENGTH, &uniform_max_length);
michael@0:         size_t mapped_max_length = 0;
michael@0:         ShGetInfo(compiler, SH_MAPPED_NAME_MAX_LENGTH, &mapped_max_length);
michael@0: 
michael@0:         shader->mAttribMaxNameLength = attrib_max_length;
michael@0: 
michael@0:         shader->mAttributes.Clear();
michael@0:         shader->mUniforms.Clear();
michael@0:         shader->mUniformInfos.Clear();
michael@0: 
michael@0:         nsAutoArrayPtr<char> attribute_name(new char[attrib_max_length+1]);
michael@0:         nsAutoArrayPtr<char> uniform_name(new char[uniform_max_length+1]);
michael@0:         nsAutoArrayPtr<char> mapped_name(new char[mapped_max_length+1]);
michael@0: 
michael@0:         for (size_t i = 0; i < num_uniforms; i++) {
michael@0:             size_t length;
michael@0:             int size;
michael@0:             ShDataType type;
michael@0:             ShGetActiveUniform(compiler, (int)i,
michael@0:                                 &length, &size, &type,
michael@0:                                 uniform_name,
michael@0:                                 mapped_name);
michael@0:             if (useShaderSourceTranslation) {
michael@0:                 shader->mUniforms.AppendElement(WebGLMappedIdentifier(
michael@0:                                                     nsDependentCString(uniform_name),
michael@0:                                                     nsDependentCString(mapped_name)));
michael@0:             }
michael@0: 
michael@0:             // we always query uniform info, regardless of useShaderSourceTranslation,
michael@0:             // as we need it to validate uniform setter calls, and it doesn't rely on
michael@0:             // shader translation.
michael@0:             char mappedNameLength = strlen(mapped_name);
michael@0:             char mappedNameLastChar = mappedNameLength > 1
michael@0:                                       ? mapped_name[mappedNameLength - 1]
michael@0:                                       : 0;
michael@0:             shader->mUniformInfos.AppendElement(WebGLUniformInfo(
michael@0:                                                     size,
michael@0:                                                     mappedNameLastChar == ']',
michael@0:                                                     type));
michael@0:         }
michael@0: 
michael@0:         if (useShaderSourceTranslation) {
michael@0: 
michael@0:             for (size_t i = 0; i < num_attributes; i++) {
michael@0:                 size_t length;
michael@0:                 int size;
michael@0:                 ShDataType type;
michael@0:                 ShGetActiveAttrib(compiler, (int)i,
michael@0:                                   &length, &size, &type,
michael@0:                                   attribute_name,
michael@0:                                   mapped_name);
michael@0:                 shader->mAttributes.AppendElement(WebGLMappedIdentifier(
michael@0:                                                     nsDependentCString(attribute_name),
michael@0:                                                     nsDependentCString(mapped_name)));
michael@0:             }
michael@0: 
michael@0:             size_t lenWithNull = 0;
michael@0:             ShGetInfo(compiler, SH_OBJECT_CODE_LENGTH, &lenWithNull);
michael@0:             MOZ_ASSERT(lenWithNull >= 1);
michael@0:             size_t len = lenWithNull - 1;
michael@0: 
michael@0:             nsAutoCString translatedSrc;
michael@0:             translatedSrc.SetLength(len); // Allocates len+1, for the null-term.
michael@0:             ShGetObjectCode(compiler, translatedSrc.BeginWriting());
michael@0: 
michael@0:             CopyASCIItoUTF16(translatedSrc, shader->mTranslatedSource);
michael@0: 
michael@0:             const char *ts = translatedSrc.get();
michael@0: 
michael@0: #ifdef WEBGL2_BYPASS_ANGLE
michael@0:             if (bypassANGLE) {
michael@0:                 const char* driverShaderCode = bypassDriverShaderCode.Elements();
michael@0:                 gl->fShaderSource(shadername, 1, (const GLchar**) &driverShaderCode, nullptr);
michael@0:             }
michael@0:             else {
michael@0:                 gl->fShaderSource(shadername, 1, &ts, nullptr);
michael@0:             }
michael@0: #else
michael@0:             gl->fShaderSource(shadername, 1, &ts, nullptr);
michael@0: #endif
michael@0:         } else { // not useShaderSourceTranslation
michael@0:             // we just pass the raw untranslated shader source. We then can't use ANGLE idenfier mapping.
michael@0:             // that's really bad, as that means we can't be 100% conformant. We should work towards always
michael@0:             // using ANGLE identifier mapping.
michael@0:             gl->fShaderSource(shadername, 1, &s, nullptr);
michael@0: 
michael@0:             CopyASCIItoUTF16(s, shader->mTranslatedSource);
michael@0:         }
michael@0: 
michael@0:         shader->SetTranslationSuccess();
michael@0: 
michael@0:         ShDestruct(compiler);
michael@0: 
michael@0:         gl->fCompileShader(shadername);
michael@0:         GLint ok;
michael@0:         gl->fGetShaderiv(shadername, LOCAL_GL_COMPILE_STATUS, &ok);
michael@0:         shader->SetCompileStatus(ok);
michael@0:     }
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::CompressedTexImage2D(GLenum target, GLint level, GLenum internalformat,
michael@0:                                    GLsizei width, GLsizei height, GLint border,
michael@0:                                    const ArrayBufferView& view)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     const WebGLTexImageFunc func = WebGLTexImageFunc::CompTexImage;
michael@0: 
michael@0:     if (!ValidateTexImage(2, target, level, internalformat,
michael@0:                           0, 0, 0, width, height, 0,
michael@0:                           border, internalformat, LOCAL_GL_UNSIGNED_BYTE,
michael@0:                           func))
michael@0:     {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     view.ComputeLengthAndData();
michael@0: 
michael@0:     uint32_t byteLength = view.Length();
michael@0:     if (!ValidateCompTexImageDataSize(target, internalformat, width, height, byteLength, func)) {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (!ValidateCompTexImageSize(target, level, internalformat, 0, 0,
michael@0:                                   width, height, width, height, func))
michael@0:     {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fCompressedTexImage2D(target, level, internalformat, width, height, border, byteLength, view.Data());
michael@0:     WebGLTexture* tex = activeBoundTextureForTarget(target);
michael@0:     MOZ_ASSERT(tex);
michael@0:     tex->SetImageInfo(target, level, width, height, internalformat, LOCAL_GL_UNSIGNED_BYTE,
michael@0:                       WebGLImageDataStatus::InitializedImageData);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::CompressedTexSubImage2D(GLenum target, GLint level, GLint xoffset,
michael@0:                                       GLint yoffset, GLsizei width, GLsizei height,
michael@0:                                       GLenum format, const ArrayBufferView& view)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     const WebGLTexImageFunc func = WebGLTexImageFunc::CompTexSubImage;
michael@0: 
michael@0:     if (!ValidateTexImage(2, target,
michael@0:                           level, format,
michael@0:                           xoffset, yoffset, 0,
michael@0:                           width, height, 0,
michael@0:                           0, format, LOCAL_GL_UNSIGNED_BYTE,
michael@0:                           func))
michael@0:     {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     WebGLTexture *tex = activeBoundTextureForTarget(target);
michael@0:     MOZ_ASSERT(tex);
michael@0:     WebGLTexture::ImageInfo& levelInfo = tex->ImageInfoAt(target, level);
michael@0: 
michael@0:     view.ComputeLengthAndData();
michael@0: 
michael@0:     uint32_t byteLength = view.Length();
michael@0:     if (!ValidateCompTexImageDataSize(target, format, width, height, byteLength, func))
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateCompTexImageSize(target, level, format,
michael@0:                                   xoffset, yoffset,
michael@0:                                   width, height,
michael@0:                                   levelInfo.Width(), levelInfo.Height(),
michael@0:                                   func))
michael@0:     {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (levelInfo.HasUninitializedImageData())
michael@0:         tex->DoDeferredImageInitialization(target, level);
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     gl->fCompressedTexSubImage2D(target, level, xoffset, yoffset, width, height, format, byteLength, view.Data());
michael@0: }
michael@0: 
michael@0: JS::Value
michael@0: WebGLContext::GetShaderParameter(WebGLShader *shader, GLenum pname)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return JS::NullValue();
michael@0: 
michael@0:     if (!ValidateObject("getShaderParameter: shader", shader))
michael@0:         return JS::NullValue();
michael@0: 
michael@0:     GLuint shadername = shader->GLName();
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     switch (pname) {
michael@0:         case LOCAL_GL_SHADER_TYPE:
michael@0:         {
michael@0:             GLint i = 0;
michael@0:             gl->fGetShaderiv(shadername, pname, &i);
michael@0:             return JS::NumberValue(uint32_t(i));
michael@0:         }
michael@0:             break;
michael@0:         case LOCAL_GL_DELETE_STATUS:
michael@0:             return JS::BooleanValue(shader->IsDeleteRequested());
michael@0:             break;
michael@0:         case LOCAL_GL_COMPILE_STATUS:
michael@0:         {
michael@0:             GLint i = 0;
michael@0:             gl->fGetShaderiv(shadername, pname, &i);
michael@0:             return JS::BooleanValue(bool(i));
michael@0:         }
michael@0:             break;
michael@0:         default:
michael@0:             ErrorInvalidEnumInfo("getShaderParameter: parameter", pname);
michael@0:     }
michael@0: 
michael@0:     return JS::NullValue();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::GetShaderInfoLog(WebGLShader *shader, nsAString& retval)
michael@0: {
michael@0:     nsAutoCString s;
michael@0:     GetShaderInfoLog(shader, s);
michael@0:     if (s.IsVoid())
michael@0:         retval.SetIsVoid(true);
michael@0:     else
michael@0:         CopyASCIItoUTF16(s, retval);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::GetShaderInfoLog(WebGLShader *shader, nsACString& retval)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:     {
michael@0:         retval.SetIsVoid(true);
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (!ValidateObject("getShaderInfoLog: shader", shader))
michael@0:         return;
michael@0: 
michael@0:     retval = shader->TranslationLog();
michael@0:     if (!retval.IsVoid()) {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     GLuint shadername = shader->GLName();
michael@0:     GLint k = -1;
michael@0:     gl->fGetShaderiv(shadername, LOCAL_GL_INFO_LOG_LENGTH, &k);
michael@0:     if (k == -1) {
michael@0:         // XXX GL Error? should never happen.
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (k == 0) {
michael@0:         retval.Truncate();
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     retval.SetCapacity(k);
michael@0:     gl->fGetShaderInfoLog(shadername, k, &k, (char*) retval.BeginWriting());
michael@0:     retval.SetLength(k);
michael@0: }
michael@0: 
michael@0: already_AddRefed<WebGLShaderPrecisionFormat>
michael@0: WebGLContext::GetShaderPrecisionFormat(GLenum shadertype, GLenum precisiontype)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return nullptr;
michael@0: 
michael@0:     switch (shadertype) {
michael@0:         case LOCAL_GL_FRAGMENT_SHADER:
michael@0:         case LOCAL_GL_VERTEX_SHADER:
michael@0:             break;
michael@0:         default:
michael@0:             ErrorInvalidEnumInfo("getShaderPrecisionFormat: shadertype", shadertype);
michael@0:             return nullptr;
michael@0:     }
michael@0: 
michael@0:     switch (precisiontype) {
michael@0:         case LOCAL_GL_LOW_FLOAT:
michael@0:         case LOCAL_GL_MEDIUM_FLOAT:
michael@0:         case LOCAL_GL_HIGH_FLOAT:
michael@0:         case LOCAL_GL_LOW_INT:
michael@0:         case LOCAL_GL_MEDIUM_INT:
michael@0:         case LOCAL_GL_HIGH_INT:
michael@0:             break;
michael@0:         default:
michael@0:             ErrorInvalidEnumInfo("getShaderPrecisionFormat: precisiontype", precisiontype);
michael@0:             return nullptr;
michael@0:     }
michael@0: 
michael@0:     MakeContextCurrent();
michael@0:     GLint range[2], precision;
michael@0: 
michael@0:     if (mDisableFragHighP &&
michael@0:         shadertype == LOCAL_GL_FRAGMENT_SHADER &&
michael@0:         (precisiontype == LOCAL_GL_HIGH_FLOAT ||
michael@0:          precisiontype == LOCAL_GL_HIGH_INT))
michael@0:     {
michael@0:       precision = 0;
michael@0:       range[0] = 0;
michael@0:       range[1] = 0;
michael@0:     } else {
michael@0:       gl->fGetShaderPrecisionFormat(shadertype, precisiontype, range, &precision);
michael@0:     }
michael@0: 
michael@0:     nsRefPtr<WebGLShaderPrecisionFormat> retShaderPrecisionFormat
michael@0:         = new WebGLShaderPrecisionFormat(this, range[0], range[1], precision);
michael@0:     return retShaderPrecisionFormat.forget();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::GetShaderSource(WebGLShader *shader, nsAString& retval)
michael@0: {
michael@0:     if (IsContextLost()) {
michael@0:         retval.SetIsVoid(true);
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (!ValidateObject("getShaderSource: shader", shader))
michael@0:         return;
michael@0: 
michael@0:     retval.Assign(shader->Source());
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::ShaderSource(WebGLShader *shader, const nsAString& source)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!ValidateObject("shaderSource: shader", shader))
michael@0:         return;
michael@0: 
michael@0:     // We're storing an actual instance of StripComments because, if we don't, the
michael@0:     // cleanSource nsAString instance will be destroyed before the reference is
michael@0:     // actually used.
michael@0:     StripComments stripComments(source);
michael@0:     const nsAString& cleanSource = Substring(stripComments.result().Elements(), stripComments.length());
michael@0:     if (!ValidateGLSLString(cleanSource, "compileShader"))
michael@0:         return;
michael@0: 
michael@0:     shader->SetSource(source);
michael@0: 
michael@0:     shader->SetNeedsTranslation();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::GetShaderTranslatedSource(WebGLShader *shader, nsAString& retval)
michael@0: {
michael@0:     if (IsContextLost()) {
michael@0:         retval.SetIsVoid(true);
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (!ValidateObject("getShaderTranslatedSource: shader", shader))
michael@0:         return;
michael@0: 
michael@0:     retval.Assign(shader->TranslatedSource());
michael@0: }
michael@0: 
michael@0: GLenum WebGLContext::CheckedTexImage2D(GLenum target,
michael@0:                                        GLint level,
michael@0:                                        GLenum internalFormat,
michael@0:                                        GLsizei width,
michael@0:                                        GLsizei height,
michael@0:                                        GLint border,
michael@0:                                        GLenum format,
michael@0:                                        GLenum type,
michael@0:                                        const GLvoid *data)
michael@0: {
michael@0:     MOZ_ASSERT(internalFormat == format);
michael@0:     WebGLTexture *tex = activeBoundTextureForTarget(target);
michael@0:     MOZ_ASSERT(tex != nullptr, "no texture bound");
michael@0: 
michael@0:     bool sizeMayChange = true;
michael@0: 
michael@0:     if (tex->HasImageInfoAt(target, level)) {
michael@0:         const WebGLTexture::ImageInfo& imageInfo = tex->ImageInfoAt(target, level);
michael@0:         sizeMayChange = width != imageInfo.Width() ||
michael@0:                         height != imageInfo.Height() ||
michael@0:                         format != imageInfo.WebGLFormat() ||
michael@0:                         type != imageInfo.WebGLType();
michael@0:     }
michael@0: 
michael@0:     // Convert to format and type required by OpenGL 'driver'.
michael@0:     GLenum driverType = DriverTypeFromType(gl, type);
michael@0:     GLenum driverInternalFormat = LOCAL_GL_NONE;
michael@0:     GLenum driverFormat = LOCAL_GL_NONE;
michael@0:     DriverFormatsFromFormatAndType(gl, format, type, &driverInternalFormat, &driverFormat);
michael@0: 
michael@0:     if (sizeMayChange) {
michael@0:         GetAndFlushUnderlyingGLErrors();
michael@0:     }
michael@0: 
michael@0:     gl->fTexImage2D(target, level, driverInternalFormat, width, height, border, driverFormat, driverType, data);
michael@0: 
michael@0:     GLenum error = LOCAL_GL_NO_ERROR;
michael@0:     if (sizeMayChange) {
michael@0:         error = GetAndFlushUnderlyingGLErrors();
michael@0:     }
michael@0: 
michael@0:     return error;
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::TexImage2D_base(GLenum target, GLint level, GLenum internalformat,
michael@0:                               GLsizei width, GLsizei height, GLsizei srcStrideOrZero,
michael@0:                               GLint border,
michael@0:                               GLenum format, GLenum type,
michael@0:                               void* data, uint32_t byteLength,
michael@0:                               int jsArrayType, // a TypedArray format enum, or -1 if not relevant
michael@0:                               WebGLTexelFormat srcFormat, bool srcPremultiplied)
michael@0: {
michael@0:     const WebGLTexImageFunc func = WebGLTexImageFunc::TexImage;
michael@0: 
michael@0:     if (!ValidateTexImage(2, target, level, internalformat,
michael@0:                           0, 0, 0,
michael@0:                           width, height, 0,
michael@0:                           border, format, type, func))
michael@0:     {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     const bool isDepthTexture = format == LOCAL_GL_DEPTH_COMPONENT ||
michael@0:                                 format == LOCAL_GL_DEPTH_STENCIL;
michael@0: 
michael@0:     if (isDepthTexture) {
michael@0:         if (data != nullptr || level != 0)
michael@0:             return ErrorInvalidOperation("texImage2D: "
michael@0:                                          "with format of DEPTH_COMPONENT or DEPTH_STENCIL, "
michael@0:                                          "data must be nullptr, "
michael@0:                                          "level must be zero");
michael@0:     }
michael@0: 
michael@0:     if (!ValidateTexInputData(type, jsArrayType, func))
michael@0:         return;
michael@0: 
michael@0:     WebGLTexelFormat dstFormat = GetWebGLTexelFormat(format, type);
michael@0:     WebGLTexelFormat actualSrcFormat = srcFormat == WebGLTexelFormat::Auto ? dstFormat : srcFormat;
michael@0: 
michael@0:     uint32_t srcTexelSize = WebGLTexelConversions::TexelBytesForFormat(actualSrcFormat);
michael@0: 
michael@0:     CheckedUint32 checked_neededByteLength =
michael@0:         GetImageSize(height, width, srcTexelSize, mPixelStoreUnpackAlignment);
michael@0: 
michael@0:     CheckedUint32 checked_plainRowSize = CheckedUint32(width) * srcTexelSize;
michael@0:     CheckedUint32 checked_alignedRowSize =
michael@0:         RoundedToNextMultipleOf(checked_plainRowSize.value(), mPixelStoreUnpackAlignment);
michael@0: 
michael@0:     if (!checked_neededByteLength.isValid())
michael@0:         return ErrorInvalidOperation("texImage2D: integer overflow computing the needed buffer size");
michael@0: 
michael@0:     uint32_t bytesNeeded = checked_neededByteLength.value();
michael@0: 
michael@0:     if (byteLength && byteLength < bytesNeeded)
michael@0:         return ErrorInvalidOperation("texImage2D: not enough data for operation (need %d, have %d)",
michael@0:                                  bytesNeeded, byteLength);
michael@0: 
michael@0:     WebGLTexture *tex = activeBoundTextureForTarget(target);
michael@0: 
michael@0:     if (!tex)
michael@0:         return ErrorInvalidOperation("texImage2D: no texture is bound to this target");
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     nsAutoArrayPtr<uint8_t> convertedData;
michael@0:     void* pixels = nullptr;
michael@0:     WebGLImageDataStatus imageInfoStatusIfSuccess = WebGLImageDataStatus::UninitializedImageData;
michael@0: 
michael@0:     if (byteLength) {
michael@0:         size_t   srcStride = srcStrideOrZero ? srcStrideOrZero : checked_alignedRowSize.value();
michael@0:         uint32_t dstTexelSize = GetBitsPerTexel(format, type) / 8;
michael@0:         size_t   dstPlainRowSize = dstTexelSize * width;
michael@0:         size_t   unpackAlignment = mPixelStoreUnpackAlignment;
michael@0:         size_t   dstStride = ((dstPlainRowSize + unpackAlignment-1) / unpackAlignment) * unpackAlignment;
michael@0: 
michael@0:         if (actualSrcFormat == dstFormat &&
michael@0:             srcPremultiplied == mPixelStorePremultiplyAlpha &&
michael@0:             srcStride == dstStride &&
michael@0:             !mPixelStoreFlipY)
michael@0:         {
michael@0:             // no conversion, no flipping, so we avoid copying anything and just pass the source pointer
michael@0:             pixels = data;
michael@0:         }
michael@0:         else
michael@0:         {
michael@0:             size_t convertedDataSize = height * dstStride;
michael@0:             convertedData = new uint8_t[convertedDataSize];
michael@0:             ConvertImage(width, height, srcStride, dstStride,
michael@0:                         static_cast<uint8_t*>(data), convertedData,
michael@0:                         actualSrcFormat, srcPremultiplied,
michael@0:                         dstFormat, mPixelStorePremultiplyAlpha, dstTexelSize);
michael@0:             pixels = reinterpret_cast<void*>(convertedData.get());
michael@0:         }
michael@0:         imageInfoStatusIfSuccess = WebGLImageDataStatus::InitializedImageData;
michael@0:     }
michael@0: 
michael@0:     GLenum error = CheckedTexImage2D(target, level, internalformat, width,
michael@0:                                      height, border, format, type, pixels);
michael@0: 
michael@0:     if (error) {
michael@0:         GenerateWarning("texImage2D generated error %s", ErrorName(error));
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     // in all of the code paths above, we should have either initialized data,
michael@0:     // or allocated data and left it uninitialized, but in any case we shouldn't
michael@0:     // have NoImageData at this point.
michael@0:     MOZ_ASSERT(imageInfoStatusIfSuccess != WebGLImageDataStatus::NoImageData);
michael@0: 
michael@0:     tex->SetImageInfo(target, level, width, height, format, type, imageInfoStatusIfSuccess);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::TexImage2D(GLenum target, GLint level,
michael@0:                          GLenum internalformat, GLsizei width,
michael@0:                          GLsizei height, GLint border, GLenum format,
michael@0:                          GLenum type, const Nullable<ArrayBufferView> &pixels, ErrorResult& rv)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     void* data;
michael@0:     uint32_t length;
michael@0:     int jsArrayType;
michael@0:     if (pixels.IsNull()) {
michael@0:         data = nullptr;
michael@0:         length = 0;
michael@0:         jsArrayType = -1;
michael@0:     } else {
michael@0:         const ArrayBufferView& view = pixels.Value();
michael@0:         view.ComputeLengthAndData();
michael@0: 
michael@0:         data = view.Data();
michael@0:         length = view.Length();
michael@0:         jsArrayType = int(JS_GetArrayBufferViewType(view.Obj()));
michael@0:     }
michael@0: 
michael@0:     return TexImage2D_base(target, level, internalformat, width, height, 0, border, format, type,
michael@0:                            data, length, jsArrayType,
michael@0:                            WebGLTexelFormat::Auto, false);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::TexImage2D(GLenum target, GLint level,
michael@0:                          GLenum internalformat, GLenum format,
michael@0:                          GLenum type, ImageData* pixels, ErrorResult& rv)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!pixels) {
michael@0:         // Spec says to generate an INVALID_VALUE error
michael@0:         return ErrorInvalidValue("texImage2D: null ImageData");
michael@0:     }
michael@0: 
michael@0:     Uint8ClampedArray arr(pixels->GetDataObject());
michael@0:     arr.ComputeLengthAndData();
michael@0: 
michael@0:     return TexImage2D_base(target, level, internalformat, pixels->Width(),
michael@0:                            pixels->Height(), 4*pixels->Width(), 0,
michael@0:                            format, type, arr.Data(), arr.Length(), -1,
michael@0:                            WebGLTexelFormat::RGBA8, false);
michael@0: }
michael@0: 
michael@0: 
michael@0: void
michael@0: WebGLContext::TexSubImage2D_base(GLenum target, GLint level,
michael@0:                                  GLint xoffset, GLint yoffset,
michael@0:                                  GLsizei width, GLsizei height, GLsizei srcStrideOrZero,
michael@0:                                  GLenum format, GLenum type,
michael@0:                                  void* data, uint32_t byteLength,
michael@0:                                  int jsArrayType,
michael@0:                                  WebGLTexelFormat srcFormat, bool srcPremultiplied)
michael@0: {
michael@0:     const WebGLTexImageFunc func = WebGLTexImageFunc::TexSubImage;
michael@0: 
michael@0:     if (!ValidateTexImage(2, target, level, format,
michael@0:                           xoffset, yoffset, 0,
michael@0:                           width, height, 0,
michael@0:                           0, format, type, func))
michael@0:     {
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     if (!ValidateTexInputData(type, jsArrayType, func))
michael@0:         return;
michael@0: 
michael@0:     WebGLTexelFormat dstFormat = GetWebGLTexelFormat(format, type);
michael@0:     WebGLTexelFormat actualSrcFormat = srcFormat == WebGLTexelFormat::Auto ? dstFormat : srcFormat;
michael@0: 
michael@0:     uint32_t srcTexelSize = WebGLTexelConversions::TexelBytesForFormat(actualSrcFormat);
michael@0: 
michael@0:     if (width == 0 || height == 0)
michael@0:         return; // ES 2.0 says it has no effect, we better return right now
michael@0: 
michael@0:     CheckedUint32 checked_neededByteLength =
michael@0:         GetImageSize(height, width, srcTexelSize, mPixelStoreUnpackAlignment);
michael@0: 
michael@0:     CheckedUint32 checked_plainRowSize = CheckedUint32(width) * srcTexelSize;
michael@0: 
michael@0:     CheckedUint32 checked_alignedRowSize =
michael@0:         RoundedToNextMultipleOf(checked_plainRowSize.value(), mPixelStoreUnpackAlignment);
michael@0: 
michael@0:     if (!checked_neededByteLength.isValid())
michael@0:         return ErrorInvalidOperation("texSubImage2D: integer overflow computing the needed buffer size");
michael@0: 
michael@0:     uint32_t bytesNeeded = checked_neededByteLength.value();
michael@0: 
michael@0:     if (byteLength < bytesNeeded)
michael@0:         return ErrorInvalidOperation("texSubImage2D: not enough data for operation (need %d, have %d)", bytesNeeded, byteLength);
michael@0: 
michael@0:     WebGLTexture *tex = activeBoundTextureForTarget(target);
michael@0:     const WebGLTexture::ImageInfo &imageInfo = tex->ImageInfoAt(target, level);
michael@0: 
michael@0:     if (imageInfo.HasUninitializedImageData())
michael@0:         tex->DoDeferredImageInitialization(target, level);
michael@0: 
michael@0:     MakeContextCurrent();
michael@0: 
michael@0:     size_t   srcStride = srcStrideOrZero ? srcStrideOrZero : checked_alignedRowSize.value();
michael@0:     uint32_t dstTexelSize = GetBitsPerTexel(format, type) / 8;
michael@0:     size_t   dstPlainRowSize = dstTexelSize * width;
michael@0:     // There are checks above to ensure that this won't overflow.
michael@0:     size_t   dstStride = RoundedToNextMultipleOf(dstPlainRowSize, mPixelStoreUnpackAlignment).value();
michael@0: 
michael@0:     void* pixels = data;
michael@0:     nsAutoArrayPtr<uint8_t> convertedData;
michael@0: 
michael@0:     // no conversion, no flipping, so we avoid copying anything and just pass the source pointer
michael@0:     bool noConversion = (actualSrcFormat == dstFormat &&
michael@0:                          srcPremultiplied == mPixelStorePremultiplyAlpha &&
michael@0:                          srcStride == dstStride &&
michael@0:                          !mPixelStoreFlipY);
michael@0: 
michael@0:     if (!noConversion) {
michael@0:         size_t convertedDataSize = height * dstStride;
michael@0:         convertedData = new uint8_t[convertedDataSize];
michael@0:         ConvertImage(width, height, srcStride, dstStride,
michael@0:                     static_cast<const uint8_t*>(data), convertedData,
michael@0:                     actualSrcFormat, srcPremultiplied,
michael@0:                     dstFormat, mPixelStorePremultiplyAlpha, dstTexelSize);
michael@0:         pixels = reinterpret_cast<void*>(convertedData.get());
michael@0:     }
michael@0: 
michael@0:     GLenum driverType = DriverTypeFromType(gl, type);
michael@0:     GLenum driverInternalFormat = LOCAL_GL_NONE;
michael@0:     GLenum driverFormat = LOCAL_GL_NONE;
michael@0:     DriverFormatsFromFormatAndType(gl, format, type, &driverInternalFormat, &driverFormat);
michael@0: 
michael@0:     gl->fTexSubImage2D(target, level, xoffset, yoffset, width, height, driverFormat, driverType, pixels);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::TexSubImage2D(GLenum target, GLint level,
michael@0:                             GLint xoffset, GLint yoffset,
michael@0:                             GLsizei width, GLsizei height,
michael@0:                             GLenum format, GLenum type,
michael@0:                             const Nullable<ArrayBufferView> &pixels,
michael@0:                             ErrorResult& rv)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (pixels.IsNull())
michael@0:         return ErrorInvalidValue("texSubImage2D: pixels must not be null!");
michael@0: 
michael@0:     const ArrayBufferView& view = pixels.Value();
michael@0:     view.ComputeLengthAndData();
michael@0: 
michael@0:     return TexSubImage2D_base(target, level, xoffset, yoffset,
michael@0:                               width, height, 0, format, type,
michael@0:                               view.Data(), view.Length(),
michael@0:                               JS_GetArrayBufferViewType(view.Obj()),
michael@0:                               WebGLTexelFormat::Auto, false);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::TexSubImage2D(GLenum target, GLint level,
michael@0:                             GLint xoffset, GLint yoffset,
michael@0:                             GLenum format, GLenum type, ImageData* pixels,
michael@0:                             ErrorResult& rv)
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0: 
michael@0:     if (!pixels)
michael@0:         return ErrorInvalidValue("texSubImage2D: pixels must not be null!");
michael@0: 
michael@0:     Uint8ClampedArray arr(pixels->GetDataObject());
michael@0:     arr.ComputeLengthAndData();
michael@0: 
michael@0:     return TexSubImage2D_base(target, level, xoffset, yoffset,
michael@0:                               pixels->Width(), pixels->Height(),
michael@0:                               4*pixels->Width(), format, type,
michael@0:                               arr.Data(), arr.Length(),
michael@0:                               -1,
michael@0:                               WebGLTexelFormat::RGBA8, false);
michael@0: }
michael@0: 
michael@0: bool
michael@0: WebGLContext::LoseContext()
michael@0: {
michael@0:     if (IsContextLost())
michael@0:         return false;
michael@0: 
michael@0:     ForceLoseContext();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: WebGLContext::RestoreContext()
michael@0: {
michael@0:     if (!IsContextLost() || !mAllowRestore) {
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     ForceRestoreContext();
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: BaseTypeAndSizeFromUniformType(GLenum uType, GLenum *baseType, GLint *unitSize)
michael@0: {
michael@0:     switch (uType) {
michael@0:         case LOCAL_GL_INT:
michael@0:         case LOCAL_GL_INT_VEC2:
michael@0:         case LOCAL_GL_INT_VEC3:
michael@0:         case LOCAL_GL_INT_VEC4:
michael@0:         case LOCAL_GL_SAMPLER_2D:
michael@0:         case LOCAL_GL_SAMPLER_CUBE:
michael@0:             *baseType = LOCAL_GL_INT;
michael@0:             break;
michael@0:         case LOCAL_GL_FLOAT:
michael@0:         case LOCAL_GL_FLOAT_VEC2:
michael@0:         case LOCAL_GL_FLOAT_VEC3:
michael@0:         case LOCAL_GL_FLOAT_VEC4:
michael@0:         case LOCAL_GL_FLOAT_MAT2:
michael@0:         case LOCAL_GL_FLOAT_MAT3:
michael@0:         case LOCAL_GL_FLOAT_MAT4:
michael@0:             *baseType = LOCAL_GL_FLOAT;
michael@0:             break;
michael@0:         case LOCAL_GL_BOOL:
michael@0:         case LOCAL_GL_BOOL_VEC2:
michael@0:         case LOCAL_GL_BOOL_VEC3:
michael@0:         case LOCAL_GL_BOOL_VEC4:
michael@0:             *baseType = LOCAL_GL_BOOL; // pretend these are int
michael@0:             break;
michael@0:         default:
michael@0:             return false;
michael@0:     }
michael@0: 
michael@0:     switch (uType) {
michael@0:         case LOCAL_GL_INT:
michael@0:         case LOCAL_GL_FLOAT:
michael@0:         case LOCAL_GL_BOOL:
michael@0:         case LOCAL_GL_SAMPLER_2D:
michael@0:         case LOCAL_GL_SAMPLER_CUBE:
michael@0:             *unitSize = 1;
michael@0:             break;
michael@0:         case LOCAL_GL_INT_VEC2:
michael@0:         case LOCAL_GL_FLOAT_VEC2:
michael@0:         case LOCAL_GL_BOOL_VEC2:
michael@0:             *unitSize = 2;
michael@0:             break;
michael@0:         case LOCAL_GL_INT_VEC3:
michael@0:         case LOCAL_GL_FLOAT_VEC3:
michael@0:         case LOCAL_GL_BOOL_VEC3:
michael@0:             *unitSize = 3;
michael@0:             break;
michael@0:         case LOCAL_GL_INT_VEC4:
michael@0:         case LOCAL_GL_FLOAT_VEC4:
michael@0:         case LOCAL_GL_BOOL_VEC4:
michael@0:             *unitSize = 4;
michael@0:             break;
michael@0:         case LOCAL_GL_FLOAT_MAT2:
michael@0:             *unitSize = 4;
michael@0:             break;
michael@0:         case LOCAL_GL_FLOAT_MAT3:
michael@0:             *unitSize = 9;
michael@0:             break;
michael@0:         case LOCAL_GL_FLOAT_MAT4:
michael@0:             *unitSize = 16;
michael@0:             break;
michael@0:         default:
michael@0:             return false;
michael@0:     }
michael@0: 
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: 
michael@0: WebGLTexelFormat mozilla::GetWebGLTexelFormat(GLenum internalformat, GLenum type)
michael@0: {
michael@0:     //
michael@0:     // WEBGL_depth_texture
michael@0:     if (internalformat == LOCAL_GL_DEPTH_COMPONENT) {
michael@0:         switch (type) {
michael@0:             case LOCAL_GL_UNSIGNED_SHORT:
michael@0:                 return WebGLTexelFormat::D16;
michael@0:             case LOCAL_GL_UNSIGNED_INT:
michael@0:                 return WebGLTexelFormat::D32;
michael@0:         }
michael@0: 
michael@0:         MOZ_CRASH("Invalid WebGL texture format/type?");
michael@0:     }
michael@0: 
michael@0:     if (internalformat == LOCAL_GL_DEPTH_STENCIL) {
michael@0:         switch (type) {
michael@0:             case LOCAL_GL_UNSIGNED_INT_24_8_EXT:
michael@0:                 return WebGLTexelFormat::D24S8;
michael@0:         }
michael@0: 
michael@0:         MOZ_CRASH("Invalid WebGL texture format/type?");
michael@0:     }
michael@0: 
michael@0:     if (internalformat == LOCAL_GL_DEPTH_COMPONENT16) {
michael@0:         return WebGLTexelFormat::D16;
michael@0:     }
michael@0: 
michael@0:     if (internalformat == LOCAL_GL_DEPTH_COMPONENT32) {
michael@0:         return WebGLTexelFormat::D32;
michael@0:     }
michael@0: 
michael@0:     if (internalformat == LOCAL_GL_DEPTH24_STENCIL8) {
michael@0:         return WebGLTexelFormat::D24S8;
michael@0:     }
michael@0: 
michael@0:     if (type == LOCAL_GL_UNSIGNED_BYTE) {
michael@0:         switch (internalformat) {
michael@0:             case LOCAL_GL_RGBA:
michael@0:             case LOCAL_GL_SRGB_ALPHA_EXT:
michael@0:                 return WebGLTexelFormat::RGBA8;
michael@0:             case LOCAL_GL_RGB:
michael@0:             case LOCAL_GL_SRGB_EXT:
michael@0:                 return WebGLTexelFormat::RGB8;
michael@0:             case LOCAL_GL_ALPHA:
michael@0:                 return WebGLTexelFormat::A8;
michael@0:             case LOCAL_GL_LUMINANCE:
michael@0:                 return WebGLTexelFormat::R8;
michael@0:             case LOCAL_GL_LUMINANCE_ALPHA:
michael@0:                 return WebGLTexelFormat::RA8;
michael@0:         }
michael@0: 
michael@0:         MOZ_CRASH("Invalid WebGL texture format/type?");
michael@0:     }
michael@0: 
michael@0:     if (type == LOCAL_GL_FLOAT) {
michael@0:         // OES_texture_float
michael@0:         switch (internalformat) {
michael@0:             case LOCAL_GL_RGBA:
michael@0:             case LOCAL_GL_RGBA32F:
michael@0:                 return WebGLTexelFormat::RGBA32F;
michael@0:             case LOCAL_GL_RGB:
michael@0:             case LOCAL_GL_RGB32F:
michael@0:                 return WebGLTexelFormat::RGB32F;
michael@0:             case LOCAL_GL_ALPHA:
michael@0:             case LOCAL_GL_ALPHA32F_ARB:
michael@0:                 return WebGLTexelFormat::A32F;
michael@0:             case LOCAL_GL_LUMINANCE:
michael@0:             case LOCAL_GL_LUMINANCE32F_ARB:
michael@0:                 return WebGLTexelFormat::R32F;
michael@0:             case LOCAL_GL_LUMINANCE_ALPHA:
michael@0:             case LOCAL_GL_LUMINANCE_ALPHA32F_ARB:
michael@0:                 return WebGLTexelFormat::RA32F;
michael@0:         }
michael@0: 
michael@0:         MOZ_CRASH("Invalid WebGL texture format/type?");
michael@0:     } else if (type == LOCAL_GL_HALF_FLOAT_OES) {
michael@0:         // OES_texture_half_float
michael@0:         switch (internalformat) {
michael@0:             case LOCAL_GL_RGBA:
michael@0:             case LOCAL_GL_RGBA16F:
michael@0:                 return WebGLTexelFormat::RGBA16F;
michael@0:             case LOCAL_GL_RGB:
michael@0:             case LOCAL_GL_RGB16F:
michael@0:                 return WebGLTexelFormat::RGB16F;
michael@0:             case LOCAL_GL_ALPHA:
michael@0:             case LOCAL_GL_ALPHA16F_ARB:
michael@0:                 return WebGLTexelFormat::A16F;
michael@0:             case LOCAL_GL_LUMINANCE:
michael@0:             case LOCAL_GL_LUMINANCE16F_ARB:
michael@0:                 return WebGLTexelFormat::R16F;
michael@0:             case LOCAL_GL_LUMINANCE_ALPHA:
michael@0:             case LOCAL_GL_LUMINANCE_ALPHA16F_ARB:
michael@0:                 return WebGLTexelFormat::RA16F;
michael@0:             default:
michael@0:                 MOZ_ASSERT(false, "Coding mistake?! Should never reach this point.");
michael@0:                 return WebGLTexelFormat::BadFormat;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     switch (type) {
michael@0:         case LOCAL_GL_UNSIGNED_SHORT_4_4_4_4:
michael@0:            return WebGLTexelFormat::RGBA4444;
michael@0:         case LOCAL_GL_UNSIGNED_SHORT_5_5_5_1:
michael@0:            return WebGLTexelFormat::RGBA5551;
michael@0:         case LOCAL_GL_UNSIGNED_SHORT_5_6_5:
michael@0:            return WebGLTexelFormat::RGB565;
michael@0:         default:
michael@0:             MOZ_ASSERT(false, "Coding mistake?! Should never reach this point.");
michael@0:             return WebGLTexelFormat::BadFormat;
michael@0:     }
michael@0: 
michael@0:     MOZ_CRASH("Invalid WebGL texture format/type?");
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::BlendColor(GLclampf r, GLclampf g, GLclampf b, GLclampf a) {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0:     MakeContextCurrent();
michael@0:     gl->fBlendColor(r, g, b, a);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Flush() {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0:     MakeContextCurrent();
michael@0:     gl->fFlush();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::Finish() {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0:     MakeContextCurrent();
michael@0:     gl->fFinish();
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::LineWidth(GLfloat width) {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0:     MakeContextCurrent();
michael@0:     gl->fLineWidth(width);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::PolygonOffset(GLfloat factor, GLfloat units) {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0:     MakeContextCurrent();
michael@0:     gl->fPolygonOffset(factor, units);
michael@0: }
michael@0: 
michael@0: void
michael@0: WebGLContext::SampleCoverage(GLclampf value, WebGLboolean invert) {
michael@0:     if (IsContextLost())
michael@0:         return;
michael@0:     MakeContextCurrent();
michael@0:     gl->fSampleCoverage(value, invert);
michael@0: }