The Tor Browser: content/canvas/src/WebGLContextState.cpp@6474c204b198 (annotated)

content/canvas/src/WebGLContextState.cpp@6474c204b198 (annotated)

content/canvas/src/WebGLContextState.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "WebGLContext.h"
 #include "WebGLContextUtils.h"
 #include "WebGLBuffer.h"
 #include "WebGLShader.h"
 #include "WebGLProgram.h"
 #include "WebGLFramebuffer.h"
 #include "WebGLRenderbuffer.h"
 #include "WebGLTexture.h"
 #include "WebGLVertexArray.h"
 #include "GLContext.h"
 #include "mozilla/dom/ToJSValue.h"
 using namespace mozilla;
 using namespace dom;
 void
 WebGLContext::Disable(GLenum cap)
 {
     if (IsContextLost())
         return;
     if (!ValidateCapabilityEnum(cap, "disable"))
         return;
     realGLboolean* trackingSlot = GetStateTrackingSlot(cap);
     if (trackingSlot)
     {
         *trackingSlot = 0;
     }
     MakeContextCurrent();
     gl->fDisable(cap);
 }
 void
 WebGLContext::Enable(GLenum cap)
 {
     if (IsContextLost())
         return;
     if (!ValidateCapabilityEnum(cap, "enable"))
         return;
     realGLboolean* trackingSlot = GetStateTrackingSlot(cap);
     if (trackingSlot)
     {
         *trackingSlot = 1;
     }
     MakeContextCurrent();
     gl->fEnable(cap);
 }
 static JS::Value
 StringValue(JSContext* cx, const char* chars, ErrorResult& rv)
 {
     JSString* str = JS_NewStringCopyZ(cx, chars);
     if (!str) {
         rv.Throw(NS_ERROR_OUT_OF_MEMORY);
         return JS::NullValue();
     }
     return JS::StringValue(str);
 }
 JS::Value
 WebGLContext::GetParameter(JSContext* cx, GLenum pname, ErrorResult& rv)
 {
     if (IsContextLost())
         return JS::NullValue();
     MakeContextCurrent();
     if (MinCapabilityMode()) {
         switch(pname) {
             ////////////////////////////
             // Single-value params
             // int
             case LOCAL_GL_MAX_VERTEX_ATTRIBS:
                 return JS::Int32Value(MINVALUE_GL_MAX_VERTEX_ATTRIBS);
             case LOCAL_GL_MAX_FRAGMENT_UNIFORM_VECTORS:
                 return JS::Int32Value(MINVALUE_GL_MAX_FRAGMENT_UNIFORM_VECTORS);
             case LOCAL_GL_MAX_VERTEX_UNIFORM_VECTORS:
                 return JS::Int32Value(MINVALUE_GL_MAX_VERTEX_UNIFORM_VECTORS);
             case LOCAL_GL_MAX_VARYING_VECTORS:
                 return JS::Int32Value(MINVALUE_GL_MAX_VARYING_VECTORS);
             case LOCAL_GL_MAX_TEXTURE_SIZE:
                 return JS::Int32Value(MINVALUE_GL_MAX_TEXTURE_SIZE);
             case LOCAL_GL_MAX_CUBE_MAP_TEXTURE_SIZE:
                 return JS::Int32Value(MINVALUE_GL_MAX_CUBE_MAP_TEXTURE_SIZE);
             case LOCAL_GL_MAX_TEXTURE_IMAGE_UNITS:
                 return JS::Int32Value(MINVALUE_GL_MAX_TEXTURE_IMAGE_UNITS);
             case LOCAL_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
                 return JS::Int32Value(MINVALUE_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS);
             case LOCAL_GL_MAX_RENDERBUFFER_SIZE:
                 return JS::Int32Value(MINVALUE_GL_MAX_RENDERBUFFER_SIZE);
             default:
                 // Return the real value; we're not overriding this one
                 break;
         }
     }
     if (IsExtensionEnabled(WebGLExtensionID::WEBGL_draw_buffers)) {
         if (pname == LOCAL_GL_MAX_COLOR_ATTACHMENTS) {
             return JS::Int32Value(mGLMaxColorAttachments);
         } else if (pname == LOCAL_GL_MAX_DRAW_BUFFERS) {
             return JS::Int32Value(mGLMaxDrawBuffers);
         } else if (pname >= LOCAL_GL_DRAW_BUFFER0 &&
                    pname < GLenum(LOCAL_GL_DRAW_BUFFER0 + mGLMaxDrawBuffers))
         {
             if (mBoundFramebuffer) {
                 GLint iv = 0;
                 gl->fGetIntegerv(pname, &iv);
                 return JS::Int32Value(iv);
             }
             GLint iv = 0;
             gl->fGetIntegerv(pname, &iv);
             if (iv == GLint(LOCAL_GL_COLOR_ATTACHMENT0 + pname - LOCAL_GL_DRAW_BUFFER0)) {
                 return JS::Int32Value(LOCAL_GL_BACK);
             }
             return JS::Int32Value(LOCAL_GL_NONE);
         }
     }
     if (IsExtensionEnabled(WebGLExtensionID::OES_vertex_array_object)) {
         if (pname == LOCAL_GL_VERTEX_ARRAY_BINDING) {
             if (mBoundVertexArray == mDefaultVertexArray){
                 return WebGLObjectAsJSValue(cx, (WebGLVertexArray *) nullptr, rv);
             }
             return WebGLObjectAsJSValue(cx, mBoundVertexArray.get(), rv);
         }
     }
     switch (pname) {
         //
         // String params
         //
         case LOCAL_GL_VENDOR:
             return StringValue(cx, "Mozilla", rv);
         case LOCAL_GL_RENDERER:
             return StringValue(cx, "Mozilla", rv);
         case LOCAL_GL_VERSION: {
             const char* version = 0;
             if (IsWebGL2()) {
                 version = "WebGL 2.0";
             } else {
                 version = "WebGL 1.0";
             }
             MOZ_ASSERT(version != 0);
             return StringValue(cx, version, rv);
         }
         case LOCAL_GL_SHADING_LANGUAGE_VERSION:
             return StringValue(cx, "WebGL GLSL ES 1.0", rv);
             // Privileged string params exposed by WEBGL_debug_renderer_info:
         case UNMASKED_VENDOR_WEBGL:
         case UNMASKED_RENDERER_WEBGL: {
             // The privilege check is done in WebGLContext::IsExtensionSupported.
             // So here we just have to check that the extension is enabled.
             if (!IsExtensionEnabled(WebGLExtensionID::WEBGL_debug_renderer_info)) {
                 break;
             }
             GLenum glstringname = LOCAL_GL_NONE;
             if (pname == UNMASKED_VENDOR_WEBGL) {
                 glstringname = LOCAL_GL_VENDOR;
             } else if (pname == UNMASKED_RENDERER_WEBGL) {
                 glstringname = LOCAL_GL_RENDERER;
             }
             const char* string = reinterpret_cast<const char*>(gl->fGetString(glstringname));
             return StringValue(cx, string, rv);
         }
         ////////////////////////////////
         // Single-value params
         // unsigned int
         case LOCAL_GL_CULL_FACE_MODE:
         case LOCAL_GL_FRONT_FACE:
         case LOCAL_GL_ACTIVE_TEXTURE:
         case LOCAL_GL_STENCIL_FUNC:
         case LOCAL_GL_STENCIL_FAIL:
         case LOCAL_GL_STENCIL_PASS_DEPTH_FAIL:
         case LOCAL_GL_STENCIL_PASS_DEPTH_PASS:
         case LOCAL_GL_STENCIL_BACK_FUNC:
         case LOCAL_GL_STENCIL_BACK_FAIL:
         case LOCAL_GL_STENCIL_BACK_PASS_DEPTH_FAIL:
         case LOCAL_GL_STENCIL_BACK_PASS_DEPTH_PASS:
         case LOCAL_GL_DEPTH_FUNC:
         case LOCAL_GL_BLEND_SRC_RGB:
         case LOCAL_GL_BLEND_SRC_ALPHA:
         case LOCAL_GL_BLEND_DST_RGB:
         case LOCAL_GL_BLEND_DST_ALPHA:
         case LOCAL_GL_BLEND_EQUATION_RGB:
         case LOCAL_GL_BLEND_EQUATION_ALPHA:
         case LOCAL_GL_GENERATE_MIPMAP_HINT: {
             GLint i = 0;
             gl->fGetIntegerv(pname, &i);
             return JS::NumberValue(uint32_t(i));
         }
         // int
         case LOCAL_GL_STENCIL_CLEAR_VALUE:
         case LOCAL_GL_STENCIL_REF:
         case LOCAL_GL_STENCIL_BACK_REF:
         case LOCAL_GL_UNPACK_ALIGNMENT:
         case LOCAL_GL_PACK_ALIGNMENT:
         case LOCAL_GL_SUBPIXEL_BITS:
         case LOCAL_GL_SAMPLE_BUFFERS:
         case LOCAL_GL_SAMPLES:
         case LOCAL_GL_MAX_VERTEX_ATTRIBS:
         case LOCAL_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
         case LOCAL_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
         case LOCAL_GL_MAX_TEXTURE_IMAGE_UNITS:
         case LOCAL_GL_RED_BITS:
         case LOCAL_GL_GREEN_BITS:
         case LOCAL_GL_BLUE_BITS:
         case LOCAL_GL_ALPHA_BITS:
         case LOCAL_GL_DEPTH_BITS:
         case LOCAL_GL_STENCIL_BITS: {
             GLint i = 0;
             gl->fGetIntegerv(pname, &i);
             return JS::Int32Value(i);
         }
         case LOCAL_GL_FRAGMENT_SHADER_DERIVATIVE_HINT: {
             if (IsExtensionEnabled(WebGLExtensionID::OES_standard_derivatives)) {
                 GLint i = 0;
                 gl->fGetIntegerv(pname, &i);
                 return JS::Int32Value(i);
             } else {
                 break;
             }
         }
         case LOCAL_GL_MAX_TEXTURE_SIZE:
             return JS::Int32Value(mGLMaxTextureSize);
         case LOCAL_GL_MAX_CUBE_MAP_TEXTURE_SIZE:
             return JS::Int32Value(mGLMaxCubeMapTextureSize);
         case LOCAL_GL_MAX_RENDERBUFFER_SIZE:
             return JS::Int32Value(mGLMaxRenderbufferSize);
         case LOCAL_GL_MAX_VERTEX_UNIFORM_VECTORS:
             return JS::Int32Value(mGLMaxVertexUniformVectors);
         case LOCAL_GL_MAX_FRAGMENT_UNIFORM_VECTORS:
             return JS::Int32Value(mGLMaxFragmentUniformVectors);
         case LOCAL_GL_MAX_VARYING_VECTORS:
             return JS::Int32Value(mGLMaxVaryingVectors);
         case LOCAL_GL_NUM_COMPRESSED_TEXTURE_FORMATS:
             return JS::Int32Value(0);
         case LOCAL_GL_COMPRESSED_TEXTURE_FORMATS: {
             uint32_t length = mCompressedTextureFormats.Length();
             JSObject* obj = Uint32Array::Create(cx, this, length, mCompressedTextureFormats.Elements());
             if (!obj) {
                 rv = NS_ERROR_OUT_OF_MEMORY;
             }
             return JS::ObjectOrNullValue(obj);
         }
         case LOCAL_GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS: {
             if (!IsWebGL2()) {
                 break;
             }
             return JS::Int32Value(mGLMaxTransformFeedbackSeparateAttribs);
         }
         // unsigned int. here we may have to return very large values like 2^32-1 that can't be represented as
         // javascript integer values. We just return them as doubles and javascript doesn't care.
         case LOCAL_GL_STENCIL_BACK_VALUE_MASK:
         case LOCAL_GL_STENCIL_BACK_WRITEMASK:
         case LOCAL_GL_STENCIL_VALUE_MASK:
         case LOCAL_GL_STENCIL_WRITEMASK: {
             GLint i = 0; // the GL api (glGetIntegerv) only does signed ints
             gl->fGetIntegerv(pname, &i);
             GLuint i_unsigned(i); // this is where -1 becomes 2^32-1
             double i_double(i_unsigned); // pass as FP value to allow large values such as 2^32-1.
             return JS::DoubleValue(i_double);
         }
         // float
         case LOCAL_GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT: {
             if (IsExtensionEnabled(WebGLExtensionID::EXT_texture_filter_anisotropic)) {
                 GLfloat f = 0.f;
                 gl->fGetFloatv(pname, &f);
                 return JS::DoubleValue(f);
             } else {
                 break;
             }
         }
         case LOCAL_GL_DEPTH_CLEAR_VALUE:
         case LOCAL_GL_LINE_WIDTH:
         case LOCAL_GL_POLYGON_OFFSET_FACTOR:
         case LOCAL_GL_POLYGON_OFFSET_UNITS:
         case LOCAL_GL_SAMPLE_COVERAGE_VALUE: {
             GLfloat f = 0.f;
             gl->fGetFloatv(pname, &f);
             return JS::DoubleValue(f);
         }
         // bool
         case LOCAL_GL_BLEND:
         case LOCAL_GL_DEPTH_TEST:
         case LOCAL_GL_STENCIL_TEST:
         case LOCAL_GL_CULL_FACE:
         case LOCAL_GL_DITHER:
         case LOCAL_GL_POLYGON_OFFSET_FILL:
         case LOCAL_GL_SCISSOR_TEST:
         case LOCAL_GL_SAMPLE_COVERAGE_INVERT:
         case LOCAL_GL_DEPTH_WRITEMASK: {
             realGLboolean b = 0;
             gl->fGetBooleanv(pname, &b);
             return JS::BooleanValue(bool(b));
         }
         // bool, WebGL-specific
         case UNPACK_FLIP_Y_WEBGL:
             return JS::BooleanValue(mPixelStoreFlipY);
         case UNPACK_PREMULTIPLY_ALPHA_WEBGL:
             return JS::BooleanValue(mPixelStorePremultiplyAlpha);
         // uint, WebGL-specific
         case UNPACK_COLORSPACE_CONVERSION_WEBGL:
             return JS::NumberValue(uint32_t(mPixelStoreColorspaceConversion));
         ////////////////////////////////
         // Complex values
         // 2 floats
         case LOCAL_GL_DEPTH_RANGE:
         case LOCAL_GL_ALIASED_POINT_SIZE_RANGE:
         case LOCAL_GL_ALIASED_LINE_WIDTH_RANGE: {
             GLfloat fv[2] = { 0 };
             gl->fGetFloatv(pname, fv);
             JSObject* obj = Float32Array::Create(cx, this, 2, fv);
             if (!obj) {
                 rv = NS_ERROR_OUT_OF_MEMORY;
             }
             return JS::ObjectOrNullValue(obj);
         }
         // 4 floats
         case LOCAL_GL_COLOR_CLEAR_VALUE:
         case LOCAL_GL_BLEND_COLOR: {
             GLfloat fv[4] = { 0 };
             gl->fGetFloatv(pname, fv);
             JSObject* obj = Float32Array::Create(cx, this, 4, fv);
             if (!obj) {
                 rv = NS_ERROR_OUT_OF_MEMORY;
             }
             return JS::ObjectOrNullValue(obj);
         }
         // 2 ints
         case LOCAL_GL_MAX_VIEWPORT_DIMS: {
             GLint iv[2] = { 0 };
             gl->fGetIntegerv(pname, iv);
             JSObject* obj = Int32Array::Create(cx, this, 2, iv);
             if (!obj) {
                 rv = NS_ERROR_OUT_OF_MEMORY;
             }
             return JS::ObjectOrNullValue(obj);
         }
         // 4 ints
         case LOCAL_GL_SCISSOR_BOX:
         case LOCAL_GL_VIEWPORT: {
             GLint iv[4] = { 0 };
             gl->fGetIntegerv(pname, iv);
             JSObject* obj = Int32Array::Create(cx, this, 4, iv);
             if (!obj) {
                 rv = NS_ERROR_OUT_OF_MEMORY;
             }
             return JS::ObjectOrNullValue(obj);
         }
         // 4 bools
         case LOCAL_GL_COLOR_WRITEMASK: {
             realGLboolean gl_bv[4] = { 0 };
             gl->fGetBooleanv(pname, gl_bv);
             bool vals[4] = { bool(gl_bv[0]), bool(gl_bv[1]),
                              bool(gl_bv[2]), bool(gl_bv[3]) };
             JS::Rooted<JS::Value> arr(cx);
             if (!ToJSValue(cx, vals, &arr)) {
                 rv = NS_ERROR_OUT_OF_MEMORY;
             }
             return arr;
         }
         case LOCAL_GL_ARRAY_BUFFER_BINDING: {
             return WebGLObjectAsJSValue(cx, mBoundArrayBuffer.get(), rv);
         }
         case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_BINDING: {
             if (!IsWebGL2()) {
                 break;
             }
             return WebGLObjectAsJSValue(cx, mBoundTransformFeedbackBuffer.get(), rv);
         }
         case LOCAL_GL_ELEMENT_ARRAY_BUFFER_BINDING: {
             return WebGLObjectAsJSValue(cx, mBoundVertexArray->mBoundElementArrayBuffer.get(), rv);
         }
         case LOCAL_GL_RENDERBUFFER_BINDING: {
             return WebGLObjectAsJSValue(cx, mBoundRenderbuffer.get(), rv);
         }
         case LOCAL_GL_FRAMEBUFFER_BINDING: {
             return WebGLObjectAsJSValue(cx, mBoundFramebuffer.get(), rv);
         }
         case LOCAL_GL_CURRENT_PROGRAM: {
             return WebGLObjectAsJSValue(cx, mCurrentProgram.get(), rv);
         }
         case LOCAL_GL_TEXTURE_BINDING_2D: {
             return WebGLObjectAsJSValue(cx, mBound2DTextures[mActiveTexture].get(), rv);
         }
         case LOCAL_GL_TEXTURE_BINDING_CUBE_MAP: {
             return WebGLObjectAsJSValue(cx, mBoundCubeMapTextures[mActiveTexture].get(), rv);
         }
         default:
             break;
     }
     ErrorInvalidEnumInfo("getParameter: parameter", pname);
     return JS::NullValue();
 }
 void
 WebGLContext::GetParameterIndexed(JSContext* cx, GLenum pname, GLuint index,
                                   JS::MutableHandle<JS::Value> retval)
 {
     if (IsContextLost()) {
         retval.setNull();
         return;
     }
     MakeContextCurrent();
     switch (pname) {
         case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
         {
             if (index >= mGLMaxTransformFeedbackSeparateAttribs) {
                 ErrorInvalidValue("getParameterIndexed: index should be less than MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS", index);
                 retval.setNull();
                 return;
             }
             retval.setNull(); // See bug 903594
             return;
         }
         default:
             break;
     }
     ErrorInvalidEnumInfo("getParameterIndexed: parameter", pname);
     retval.setNull();
 }
 bool
 WebGLContext::IsEnabled(GLenum cap)
 {
     if (IsContextLost())
         return false;
     if (!ValidateCapabilityEnum(cap, "isEnabled"))
         return false;
     MakeContextCurrent();
     return gl->fIsEnabled(cap);
 }
 bool
 WebGLContext::ValidateCapabilityEnum(GLenum cap, const char* info)
 {
     switch (cap) {
         case LOCAL_GL_BLEND:
         case LOCAL_GL_CULL_FACE:
         case LOCAL_GL_DEPTH_TEST:
         case LOCAL_GL_DITHER:
         case LOCAL_GL_POLYGON_OFFSET_FILL:
         case LOCAL_GL_SAMPLE_ALPHA_TO_COVERAGE:
         case LOCAL_GL_SAMPLE_COVERAGE:
         case LOCAL_GL_SCISSOR_TEST:
         case LOCAL_GL_STENCIL_TEST:
             return true;
         case LOCAL_GL_RASTERIZER_DISCARD:
             return IsWebGL2();
         default:
             ErrorInvalidEnumInfo(info, cap);
             return false;
     }
 }
 realGLboolean*
 WebGLContext::GetStateTrackingSlot(GLenum cap)
 {
     switch (cap) {
         case LOCAL_GL_SCISSOR_TEST:
             return &mScissorTestEnabled;
         case LOCAL_GL_DITHER:
             return &mDitherEnabled;
         case LOCAL_GL_RASTERIZER_DISCARD:
             return &mRasterizerDiscardEnabled;
     }
     return nullptr;
 }

The Tor Browser / annotate

content/canvas/src/WebGLContextState.cpp@6474c204b198 (annotated)

content/canvas/src/WebGLContextState.cpp