cc/resources/scoped_gpu_raster.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/resources/scoped_gpu_raster.h"
   6 #include "gpu/command_buffer/client/gles2_interface.h"
   7 #include "third_party/khronos/GLES2/gl2.h"
   8 #include "third_party/khronos/GLES2/gl2ext.h"
   9 #include "third_party/skia/include/gpu/GrContext.h"
  10
  11 using gpu::gles2::GLES2Interface;
  12
  13 namespace cc {
  14
  15 ScopedGpuRaster::ScopedGpuRaster(ContextProvider* context_provider)
  16     : context_provider_(context_provider) {
  17   BeginGpuRaster();
  18 }
  19
  20 ScopedGpuRaster::~ScopedGpuRaster() {
  21   EndGpuRaster();
  22 }
  23
  24 void ScopedGpuRaster::BeginGpuRaster() {
  25   GLES2Interface* gl = context_provider_->ContextGL();
  26
  27   // TODO(alokp): Use a trace macro to push/pop markers.
  28   // Using push/pop functions directly incurs cost to evaluate function
  29   // arguments even when tracing is disabled.
  30   gl->PushGroupMarkerEXT(0, "GpuRasterization");
  31
  32   class GrContext* gr_context = context_provider_->GrContext();
  33   gr_context->resetContext();
  34 }
  35
  36 void ScopedGpuRaster::EndGpuRaster() {
  37   class GrContext* gr_context = context_provider_->GrContext();
  38   gr_context->flush();
  39
  40   GLES2Interface* gl = context_provider_->ContextGL();
  41
  42   // Restore default GL unpack alignment.  TextureUploader expects this.
  43   gl->PixelStorei(GL_UNPACK_ALIGNMENT, 4);
  44
  45   // TODO(alokp): Use a trace macro to push/pop markers.
  46   // Using push/pop functions directly incurs cost to evaluate function
  47   // arguments even when tracing is disabled.
  48   gl->PopGroupMarkerEXT();
  49 }
  50
  51 }  // namespace cc