Add GL_EXT_unpack_subimage support to command buffer client code.

gpu/command_buffer/client/gles2_implementation.h

 // Copyright (c) 2012 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 GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_H_
 #define GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_H_
 
 #include <GLES2/gl2.h>
 
 #include <map>
@@ skipping 395 matching lines @@
   void BufferSubDataHelperImpl(
       GLenum target, GLintptr offset, GLsizeiptr size, const void* data,
       ScopedTransferBufferPtr* buffer);
 
   // Helper for GetVertexAttrib
   bool GetVertexAttribHelper(GLuint index, GLenum pname, uint32* param);
 
   GLuint GetMaxValueInBufferCHROMIUMHelper(
       GLuint buffer_id, GLsizei count, GLenum type, GLuint offset);
 
-  bool CopyRectToBufferFlipped(
-      const void* pixels, GLsizei width, GLsizei height, GLenum format,
-      GLenum type, void* buffer);
+  // The pixels pointer should already account for unpack skip rows and skip
+  // pixels.
   void TexSubImage2DImpl(
       GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
-      GLsizei height, GLenum format, GLenum type, const void* pixels,
-      GLboolean internal, ScopedTransferBufferPtr* buffer);
+      GLsizei height, GLenum format, GLenum type, uint32 unpadded_row_size,
+      const void* pixels, uint32 pixels_padded_row_size, GLboolean internal,
+      ScopedTransferBufferPtr* buffer, uint32 buffer_padded_row_size);
 
   // Helpers for query functions.
   bool GetHelper(GLenum pname, GLint* params);
   bool GetBooleanvHelper(GLenum pname, GLboolean* params);
   bool GetBufferParameterivHelper(GLenum target, GLenum pname, GLint* params);
   bool GetFloatvHelper(GLenum pname, GLfloat* params);
   bool GetFramebufferAttachmentParameterivHelper(
       GLenum target, GLenum attachment, GLenum pname, GLint* params);
   bool GetIntegervHelper(GLenum pname, GLint* params);
   bool GetProgramivHelper(GLuint program, GLenum pname, GLint* params);
@@ skipping 22 matching lines @@
 
   // pack alignment as last set by glPixelStorei
   GLint pack_alignment_;
 
   // unpack alignment as last set by glPixelStorei
   GLint unpack_alignment_;
 
   // unpack yflip as last set by glPixelstorei
   bool unpack_flip_y_;
 
+  // unpack row length as last set by glPixelStorei
+  GLint unpack_row_length_;
+
+  // unpack skip rows as last set by glPixelStorei
+  GLint unpack_skip_rows_;
+
+  // unpack skip pixels as last set by glPixelStorei
+  GLint unpack_skip_pixels_;
+
   // pack reverse row order as last set by glPixelstorei
   bool pack_reverse_row_order_;
 
   scoped_array<TextureUnit> texture_units_;
 
   // 0 to gl_state_.max_combined_texture_image_units.
   GLuint active_texture_unit_;
 
   GLuint bound_framebuffer_;
   GLuint bound_renderbuffer_;
@@ skipping 80 matching lines @@
 
 inline bool GLES2Implementation::GetTexParameterivHelper(
     GLenum /* target */, GLenum /* pname */, GLint* /* params */) {
   return false;
 }
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_H_