ui/ozone/demo/gl_renderer.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 "ui/ozone/demo/gl_renderer.h"
   6
   7 #include "base/location.h"
   8 #include "base/thread_task_runner_handle.h"
   9 #include "ui/gl/gl_bindings.h"
  10 #include "ui/gl/gl_context.h"
  11 #include "ui/gl/gl_surface.h"
  12
  13 namespace ui {
  14
  15 GlRenderer::GlRenderer(gfx::AcceleratedWidget widget, const gfx::Size& size)
  16     : RendererBase(widget, size), weak_ptr_factory_(this) {
  17 }
  18
  19 GlRenderer::~GlRenderer() {
  20 }
  21
  22 bool GlRenderer::Initialize() {
  23   surface_ = CreateSurface();
  24   if (!surface_.get()) {
  25     LOG(ERROR) << "Failed to create GL surface";
  26     return false;
  27   }
  28
  29   context_ = gfx::GLContext::CreateGLContext(NULL, surface_.get(),
  30                                              gfx::PreferIntegratedGpu);
  31   if (!context_.get()) {
  32     LOG(ERROR) << "Failed to create GL context";
  33     return false;
  34   }
  35
  36   surface_->Resize(size_);
  37
  38   if (!context_->MakeCurrent(surface_.get())) {
  39     LOG(ERROR) << "Failed to make GL context current";
  40     return false;
  41   }
  42
  43   PostRenderFrameTask(gfx::SwapResult::SWAP_ACK);
  44   return true;
  45 }
  46
  47 void GlRenderer::RenderFrame() {
  48   float fraction = NextFraction();
  49
  50   context_->MakeCurrent(surface_.get());
  51
  52   glViewport(0, 0, size_.width(), size_.height());
  53   glClearColor(1 - fraction, fraction, 0.0, 1.0);
  54   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  55
  56   if (!surface_->SwapBuffersAsync(base::Bind(&GlRenderer::PostRenderFrameTask,
  57                                              weak_ptr_factory_.GetWeakPtr())))
  58     LOG(FATAL) << "Failed to swap buffers";
  59 }
  60
  61 void GlRenderer::PostRenderFrameTask(gfx::SwapResult result) {
  62   base::ThreadTaskRunnerHandle::Get()->PostTask(
  63       FROM_HERE,
  64       base::Bind(&GlRenderer::RenderFrame, weak_ptr_factory_.GetWeakPtr()));
  65 }
  66
  67 scoped_refptr<gfx::GLSurface> GlRenderer::CreateSurface() {
  68   return gfx::GLSurface::CreateViewGLSurface(widget_);
  69 }
  70
  71 }  // namespace ui