WebGL 2: add read/write framebuffer binding points to related APIs

Source/core/html/canvas/WebGL2RenderingContextBase.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebGL2RenderingContextBase_h
 #define WebGL2RenderingContextBase_h
 
 #include "core/html/canvas/WebGLExtension.h"
 #include "core/html/canvas/WebGLRenderingContextBase.h"
 #include "wtf/PassRefPtr.h"
@@ skipping 144 matching lines @@
 
     /* Vertex Array Objects */
     PassRefPtrWillBeRawPtr<WebGLVertexArrayObjectOES> createVertexArray();
     void deleteVertexArray(WebGLVertexArrayObjectOES*);
     GLboolean isVertexArray(WebGLVertexArrayObjectOES*);
     void bindVertexArray(WebGLVertexArrayObjectOES*);
 
     /* WebGLRenderingContextBase overrides */
     void initializeNewContext() override;
     void bindFramebuffer(GLenum target, WebGLFramebuffer*) override;
+    void deleteFramebuffer(WebGLFramebuffer*) override;
     ScriptValue getParameter(ScriptState*, GLenum pname) override;
     ScriptValue getTexParameter(ScriptState*, GLenum target, GLenum pname) override;
     ScriptValue getFramebufferAttachmentParameter(ScriptState*, GLenum target, GLenum attachment, GLenum pname) override;
+    void restoreCurrentFramebuffer() override;
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     WebGL2RenderingContextBase(HTMLCanvasElement*, PassOwnPtr<WebGraphicsContext3D>, const WebGLContextAttributes& requestedAttributes);
 
     // Helper function to validate target and the attachment combination for getFramebufferAttachmentParameters.
     // Generate GL error and return false if parameters are illegal.
     bool validateGetFramebufferAttachmentParameterFunc(const char* functionName, GLenum target, GLenum attachment);
 
     bool validateClearBuffer(const char* functionName, GLenum buffer, GLsizei length);
 
     ScriptValue getInt64Parameter(ScriptState*, GLenum);
 
     void texSubImage3DImpl(GLenum, GLint, GLint, GLint, GLint, GLenum, GLenum, Image*, WebGLImageConversion::ImageHtmlDomSource, bool, bool);
 
     /* WebGLRenderingContextBase overrides */
     bool validateCapability(const char* functionName, GLenum) override;
     bool validateBufferTarget(const char* functionName, GLenum target) override;
     bool validateAndUpdateBufferBindTarget(const char* functionName, GLenum, WebGLBuffer*) override;
     WebGLTexture* validateTextureBinding(const char* functionName, GLenum target, bool useSixEnumsForCubeMap) override;
     bool validateFramebufferTarget(GLenum target) override;
     WebGLFramebuffer* getFramebufferBinding(GLenum target) override;
+    GLenum boundFramebufferColorFormat() override;
 
     RefPtrWillBeMember<WebGLFramebuffer> m_readFramebufferBinding;
 };
 
 DEFINE_TYPE_CASTS(WebGL2RenderingContextBase, CanvasRenderingContext, context,
     context->is3d() && WebGLRenderingContextBase::getWebGLVersion(context) >= 2,
     context.is3d() && WebGLRenderingContextBase::getWebGLVersion(&context) >= 2);
 
 } // namespace blink
 
 #endif