Support uploads of sub-rectangles of canvases to 2D and 3D textures.

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl

 // 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.
 
 typedef long long GLint64;
 typedef unsigned long long GLuint64;
 
 [
     NoInterfaceObject,
 ] interface WebGL2RenderingContextBase {
@@ skipping 311 matching lines @@
     void texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, ArrayBufferView? pixels);
     void texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, ArrayBufferView pixels, GLuint srcOffset);
     void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, GLintptr offset);
     void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, ImageData data);
     [RaisesException] void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, HTMLImageElement image);
     [RaisesException] void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, HTMLCanvasElement canvas);
     [RaisesException] void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, HTMLVideoElement video);
     [RaisesException] void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, ImageBitmap bitmap);
     void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, ArrayBufferView pixels, optional GLuint srcOffset = 0);
 
     // TODO(zmo): Obsolete, remove after WebGL2 conformance tests are updated.

[yunchao, 2016/11/16 02:45:16]

Remove this TODO? 

[Ken Russell (switch to Gerrit), 2016/11/16 02:54:47]

Not yet. We still have two more obsolete entry points to remove. Each requires
some code and tests to be written.

-    [RaisesException] void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLenum format, GLenum type, HTMLCanvasElement canvas);
     [RaisesException] void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLenum format, GLenum type, HTMLVideoElement video);
     [RaisesException] void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLenum format, GLenum type, ImageBitmap bitmap);
 
     void copyTexSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
 
     void compressedTexImage2D(GLenum target, GLint level, GLenum internalformat,
                               GLsizei width, GLsizei height, GLint border,
                               ArrayBufferView data, GLuint srcOffset,
                               optional GLuint srcLengthOverride = 0);
     void compressedTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
@@ skipping 110 matching lines @@
     WebGLVertexArrayObject createVertexArray();
     void deleteVertexArray(WebGLVertexArrayObject? vertexArray);
     GLboolean isVertexArray(WebGLVertexArrayObject? vertexArray);
     void bindVertexArray(WebGLVertexArrayObject? vertexArray);
 
     /* Reading */
     void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, ArrayBufferView dstData, GLintptr offset);
     void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLintptr offset);
 };
 WebGL2RenderingContextBase implements WebGLRenderingContextBase;