support uploading sub-rectangles of ImageData

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

Index: third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp
index 0d7f2fd898e4884bc7e0eb14432299276595b68a..7f0237550d6fe1a8e62abe9492834d8600182d88 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp
@@ -1309,8 +1309,13 @@ void WebGL2RenderingContextBase::texImage2D(GLenum target,
                                             GLint border,
                                             GLenum format,
                                             GLenum type,
-                                            ImageData* imageData) {
-  // TODO(zmo): To be implemented.
+                                            ImageData* pixels) {
+  DCHECK(pixels);
+  IntRect sourceImageRect;
+  sourceImageRect.setLocation(IntPoint(m_unpackSkipPixels, m_unpackSkipRows));
+  sourceImageRect.setSize(IntSize(width, height));
+  texImageHelperImageData(TexImage2D, target, level, internalformat, 0, format,
+                          type, 1, 0, 0, 0, pixels, sourceImageRect);
 }
 
 void WebGL2RenderingContextBase::texImage2D(GLenum target,
@@ -1464,7 +1469,12 @@ void WebGL2RenderingContextBase::texSubImage2D(GLenum target,
                                                GLenum format,
                                                GLenum type,
                                                ImageData* pixels) {
-  // TODO(zmo): To be implemented.
+  DCHECK(pixels);
+  IntRect sourceImageRect;
+  sourceImageRect.setLocation(IntPoint(m_unpackSkipPixels, m_unpackSkipRows));
+  sourceImageRect.setSize(IntSize(width, height));
+  texImageHelperImageData(TexSubImage2D, target, level, 0, 0, format, type, 1,
+                          xoffset, yoffset, 0, pixels, sourceImageRect);
 }
 
 void WebGL2RenderingContextBase::texSubImage2D(GLenum target,
@@ -1894,7 +1904,8 @@ void WebGL2RenderingContextBase::texSubImage3D(GLenum target,
                                                GLenum type,
                                                ImageData* pixels) {
   texImageHelperImageData(TexSubImage3D, target, level, 0, 0, format, type, 1,
-                          xoffset, yoffset, zoffset, pixels);
+                          xoffset, yoffset, zoffset, pixels,
+                          getImageDataSize(pixels));
 }
 
 void WebGL2RenderingContextBase::texSubImage3D(GLenum target,