gpu: Extend CopyTextureCHROMIUM with support for copying part of source texture.

gpu/command_buffer/service/gles2_cmd_decoder_autogen.h

 // Copyright 2014 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.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 4535 matching lines @@
     uint32_t immediate_data_size,
     const void* cmd_data) {
   const gles2::cmds::CopySubTextureCHROMIUM& c =
       *static_cast<const gles2::cmds::CopySubTextureCHROMIUM*>(cmd_data);
   (void)c;
   GLenum target = static_cast<GLenum>(c.target);
   GLenum source_id = static_cast<GLenum>(c.source_id);
   GLenum dest_id = static_cast<GLenum>(c.dest_id);
   GLint xoffset = static_cast<GLint>(c.xoffset);
   GLint yoffset = static_cast<GLint>(c.yoffset);
-  DoCopySubTextureCHROMIUM(target, source_id, dest_id, xoffset, yoffset);
+  GLint x = static_cast<GLint>(c.x);
+  GLint y = static_cast<GLint>(c.y);
+  GLsizei width = static_cast<GLsizei>(c.width);
+  GLsizei height = static_cast<GLsizei>(c.height);
+  if (width < 0) {
+    LOCAL_SET_GL_ERROR(GL_INVALID_VALUE, "glCopySubTextureCHROMIUM",
+                       "width < 0");
+    return error::kNoError;
+  }
+  if (height < 0) {
+    LOCAL_SET_GL_ERROR(GL_INVALID_VALUE, "glCopySubTextureCHROMIUM",
+                       "height < 0");
+    return error::kNoError;
+  }
+  DoCopySubTextureCHROMIUM(target, source_id, dest_id, xoffset, yoffset, x, y,
+                           width, height);
   return error::kNoError;
 }
 
 error::Error GLES2DecoderImpl::HandleProduceTextureCHROMIUMImmediate(
     uint32_t immediate_data_size,
     const void* cmd_data) {
   const gles2::cmds::ProduceTextureCHROMIUMImmediate& c =
       *static_cast<const gles2::cmds::ProduceTextureCHROMIUMImmediate*>(
           cmd_data);
   (void)c;
@@ skipping 515 matching lines @@
         state_.enable_flags.cached_primitive_restart_fixed_index = enabled;
         return true;
       }
       return false;
     default:
       NOTREACHED();
       return false;
   }
 }
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_AUTOGEN_H_