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

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

content/canvas/src/WebGLContextFramebufferOperations.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 "WebGLTexture.h"
 #include "WebGLRenderbuffer.h"
 #include "WebGLFramebuffer.h"
 #include "GLContext.h"
 using namespace mozilla;
 void
 WebGLContext::Clear(GLbitfield mask)
 {
     if (IsContextLost())
         return;
     MakeContextCurrent();
     uint32_t m = mask & (LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT | LOCAL_GL_STENCIL_BUFFER_BIT);
     if (mask != m)
         return ErrorInvalidValue("clear: invalid mask bits");
     if (mask == 0) {
         GenerateWarning("Calling gl.clear(0) has no effect.");
     } else if (mRasterizerDiscardEnabled) {
         GenerateWarning("Calling gl.clear() with RASTERIZER_DISCARD enabled has no effects.");
     }
     if (mBoundFramebuffer) {
         if (!mBoundFramebuffer->CheckAndInitializeAttachments())
             return ErrorInvalidFramebufferOperation("clear: incomplete framebuffer");
         gl->fClear(mask);
         return;
     } else {
         ClearBackbufferIfNeeded();
     }
     // Ok, we're clearing the default framebuffer/screen.
     gl->fClear(mask);
     Invalidate();
     mShouldPresent = true;
 }
 static GLclampf
 GLClampFloat(GLclampf val)
 {
     if (val < 0.0)
         return 0.0;
     if (val > 1.0)
         return 1.0;
     return val;
 }
 void
 WebGLContext::ClearColor(GLclampf r, GLclampf g,
                              GLclampf b, GLclampf a)
 {
     if (IsContextLost())
         return;
     MakeContextCurrent();
     mColorClearValue[0] = GLClampFloat(r);
     mColorClearValue[1] = GLClampFloat(g);
     mColorClearValue[2] = GLClampFloat(b);
     mColorClearValue[3] = GLClampFloat(a);
     gl->fClearColor(r, g, b, a);
 }
 void
 WebGLContext::ClearDepth(GLclampf v)
 {
     if (IsContextLost())
         return;
     MakeContextCurrent();
     mDepthClearValue = GLClampFloat(v);
     gl->fClearDepth(v);
 }
 void
 WebGLContext::ClearStencil(GLint v)
 {
     if (IsContextLost())
         return;
     MakeContextCurrent();
     mStencilClearValue = v;
     gl->fClearStencil(v);
 }
 void
 WebGLContext::ColorMask(WebGLboolean r, WebGLboolean g, WebGLboolean b, WebGLboolean a)
 {
     if (IsContextLost())
         return;
     MakeContextCurrent();
     mColorWriteMask[0] = r;
     mColorWriteMask[1] = g;
     mColorWriteMask[2] = b;
     mColorWriteMask[3] = a;
     gl->fColorMask(r, g, b, a);
 }
 void
 WebGLContext::DepthMask(WebGLboolean b)
 {
     if (IsContextLost())
         return;
     MakeContextCurrent();
     mDepthWriteMask = b;
     gl->fDepthMask(b);
 }
 void
 WebGLContext::DrawBuffers(const dom::Sequence<GLenum>& buffers)
 {
     if (IsContextLost())
         return;
     const size_t buffersLength = buffers.Length();
     if (buffersLength == 0) {
         return ErrorInvalidValue("drawBuffers: invalid <buffers> (buffers must not be empty)");
     }
     if (mBoundFramebuffer == 0)
     {
         // OK: we are rendering in the default framebuffer
         /* EXT_draw_buffers :
          If the GL is bound to the default framebuffer, then <buffersLength> must be 1
          and the constant must be BACK or NONE. When draw buffer zero is
          BACK, color values are written into the sole buffer for single-
          buffered contexts, or into the back buffer for double-buffered
          contexts. If DrawBuffersEXT is supplied with a constant other than
          BACK and NONE, the error INVALID_OPERATION is generated.
          */
         if (buffersLength != 1) {
             return ErrorInvalidValue("drawBuffers: invalid <buffers> (main framebuffer: buffers.length must be 1)");
         }
         MakeContextCurrent();
         if (buffers[0] == LOCAL_GL_NONE) {
             const GLenum drawBuffersCommand = LOCAL_GL_NONE;
             gl->fDrawBuffers(1, &drawBuffersCommand);
             return;
         }
         else if (buffers[0] == LOCAL_GL_BACK) {
             const GLenum drawBuffersCommand = LOCAL_GL_COLOR_ATTACHMENT0;
             gl->fDrawBuffers(1, &drawBuffersCommand);
             return;
         }
         return ErrorInvalidOperation("drawBuffers: invalid operation (main framebuffer: buffers[0] must be GL_NONE or GL_BACK)");
     }
     // OK: we are rendering in a framebuffer object
     if (buffersLength > size_t(mGLMaxDrawBuffers)) {
         /* EXT_draw_buffers :
          The maximum number of draw buffers is implementation-dependent. The
          number of draw buffers supported can be queried by calling
          GetIntegerv with the symbolic constant MAX_DRAW_BUFFERS_EXT. An
          INVALID_VALUE error is generated if <buffersLength> is greater than
          MAX_DRAW_BUFFERS_EXT.
          */
         return ErrorInvalidValue("drawBuffers: invalid <buffers> (buffers.length > GL_MAX_DRAW_BUFFERS)");
     }
     for (uint32_t i = 0; i < buffersLength; i++)
     {
         /* EXT_draw_buffers :
          If the GL is bound to a draw framebuffer object, the <i>th buffer listed
          in <bufs> must be COLOR_ATTACHMENT<i>_EXT or NONE. Specifying a
          buffer out of order, BACK, or COLOR_ATTACHMENT<m>_EXT where <m> is
          greater than or equal to the value of MAX_COLOR_ATTACHMENTS_EXT,
          will generate the error INVALID_OPERATION.
          */
         /* WEBGL_draw_buffers :
          The value of the MAX_COLOR_ATTACHMENTS_WEBGL parameter must be greater than or equal to that of the MAX_DRAW_BUFFERS_WEBGL parameter.
          */
         if (buffers[i] != LOCAL_GL_NONE &&
             buffers[i] != GLenum(LOCAL_GL_COLOR_ATTACHMENT0 + i)) {
             return ErrorInvalidOperation("drawBuffers: invalid operation (buffers[i] must be GL_NONE or GL_COLOR_ATTACHMENTi)");
         }
     }
     MakeContextCurrent();
     gl->fDrawBuffers(buffersLength, buffers.Elements());
 }
 void
 WebGLContext::StencilMask(GLuint mask)
 {
     if (IsContextLost())
         return;
     mStencilWriteMaskFront = mask;
     mStencilWriteMaskBack = mask;
     MakeContextCurrent();
     gl->fStencilMask(mask);
 }
 void
 WebGLContext::StencilMaskSeparate(GLenum face, GLuint mask)
 {
     if (IsContextLost())
         return;
     if (!ValidateFaceEnum(face, "stencilMaskSeparate: face"))
         return;
     switch (face) {
         case LOCAL_GL_FRONT_AND_BACK:
             mStencilWriteMaskFront = mask;
             mStencilWriteMaskBack = mask;
             break;
         case LOCAL_GL_FRONT:
             mStencilWriteMaskFront = mask;
             break;
         case LOCAL_GL_BACK:
             mStencilWriteMaskBack = mask;
             break;
     }
     MakeContextCurrent();
     gl->fStencilMaskSeparate(face, mask);
 }

The Tor Browser / annotate

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

content/canvas/src/WebGLContextFramebufferOperations.cpp