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