Support swap damage rect using eglSwapBuffersWithDamageKHR

gpu/command_buffer/client/gles2_implementation.cc

 // 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.
 
 // A class to emulate GLES2 over command buffers.
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 1431 matching lines @@
   helper_->SwapBuffers();
   helper_->CommandBufferHelper::Flush();
   // Wait if we added too many swap buffers. Add 1 to kMaxSwapBuffers to
   // compensate for TODO above.
   if (swap_buffers_tokens_.size() > kMaxSwapBuffers + 1) {
     helper_->WaitForToken(swap_buffers_tokens_.front());
     swap_buffers_tokens_.pop();
   }
 }
 
+void GLES2Implementation::SwapBuffersWithDamageCHROMIUM(GLint x,
+                                                        GLint y,
+                                                        GLint width,
+                                                        GLint height) {
+  GPU_CLIENT_SINGLE_THREAD_CHECK();
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glSwapBuffersWithDamageCHROMIUM("
+                     << x << ", " << y << ", " << width << ", " << height
+                     << ")");
+  TRACE_EVENT2("gpu", "GLES2::SwapBuffersWithDamageCHROMIUM", "width", width,
+               "height", height);
+
+  // Same flow control as GLES2Implementation::SwapBuffers (see comments there).
+  swap_buffers_tokens_.push(helper_->InsertToken());
+  helper_->SwapBuffersWithDamageCHROMIUM(x, y, width, height);
+  helper_->CommandBufferHelper::Flush();
+  if (swap_buffers_tokens_.size() > kMaxSwapBuffers + 1) {
+    helper_->WaitForToken(swap_buffers_tokens_.front());
+    swap_buffers_tokens_.pop();
+  }
+}
+
 void GLES2Implementation::SwapInterval(int interval) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glSwapInterval("
       << interval << ")");
   helper_->SwapInterval(interval);
 }
 
 void GLES2Implementation::BindAttribLocation(
   GLuint program, GLuint index, const char* name) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
@@ skipping 3245 matching lines @@
   // then it will have told the ShareGroup, so just report its status.
   if (share_group_->IsLost())
     return GL_UNKNOWN_CONTEXT_RESET_KHR;
   return GL_NO_ERROR;
 }
 
 void GLES2Implementation::Swap() {
   SwapBuffers();
 }
 
+void GLES2Implementation::SwapWithDamage(const gfx::Rect& damage) {
+  SwapBuffersWithDamageCHROMIUM(damage.x(), damage.y(), damage.width(),
+                                damage.height());
+}
+
 void GLES2Implementation::PartialSwapBuffers(const gfx::Rect& sub_buffer) {
   PostSubBufferCHROMIUM(
       sub_buffer.x(), sub_buffer.y(), sub_buffer.width(), sub_buffer.height());
 }
 
 void GLES2Implementation::CommitOverlayPlanes() {
   CommitOverlayPlanesCHROMIUM();
 }
 
 static GLenum GetGLESOverlayTransform(gfx::OverlayTransform plane_transform) {
@@ skipping 2168 matching lines @@
   cached_extensions_.clear();
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/client/gles2_implementation_impl_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu