ozone: demo: Add software support & use message loop

ui/ozone/demo/egl_demo.cc

-// 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.
-
-#include "base/at_exit.h"
-#include "base/command_line.h"
-#include "base/message_loop/message_loop.h"
-#include "ui/gfx/geometry/size.h"
-#include "ui/gl/gl_bindings.h"
-#include "ui/gl/gl_context.h"
-#include "ui/gl/gl_surface.h"
-#include "ui/ozone/public/ozone_platform.h"
-#include "ui/ozone/public/surface_factory_ozone.h"
-#include "ui/platform_window/platform_window.h"
-#include "ui/platform_window/platform_window_delegate.h"
-
-const int kTestWindowWidth = 800;
-const int kTestWindowHeight = 600;
-
-class DemoWindow : public ui::PlatformWindowDelegate {
- public:
-  DemoWindow() : widget_(gfx::kNullAcceleratedWidget) {
-    platform_window_ = ui::OzonePlatform::GetInstance()->CreatePlatformWindow(
-        this, gfx::Rect(kTestWindowWidth, kTestWindowHeight));
-  }
-  virtual ~DemoWindow() {}
-
-  gfx::AcceleratedWidget GetAcceleratedWidget() {
-    // TODO(spang): We should start rendering asynchronously.
-    CHECK_NE(widget_, gfx::kNullAcceleratedWidget)
-        << "widget not available synchronously";
-    return widget_;
-  }
-
-  gfx::Size GetSize() { return platform_window_->GetBounds().size(); }
-
-  // PlatformWindowDelegate:
-  virtual void OnBoundsChanged(const gfx::Rect& new_bounds) OVERRIDE {}
-  virtual void OnDamageRect(const gfx::Rect& damaged_region) OVERRIDE {}
-  virtual void DispatchEvent(ui::Event* event) OVERRIDE {}
-  virtual void OnCloseRequest() OVERRIDE {}
-  virtual void OnClosed() OVERRIDE {}
-  virtual void OnWindowStateChanged(
-      ui::PlatformWindowState new_state) OVERRIDE {}
-  virtual void OnLostCapture() OVERRIDE {}
-  virtual void OnAcceleratedWidgetAvailable(
-      gfx::AcceleratedWidget widget) OVERRIDE {
-    CHECK_NE(widget, gfx::kNullAcceleratedWidget);
-    widget_ = widget;
-  }
-  virtual void OnActivationChanged(bool active) OVERRIDE {}
-
- private:
-  scoped_ptr<ui::PlatformWindow> platform_window_;
-  gfx::AcceleratedWidget widget_;
-
-  DISALLOW_COPY_AND_ASSIGN(DemoWindow);
-};
-
-int main(int argc, char** argv) {
-  CommandLine::Init(argc, argv);
-  base::AtExitManager exit_manager;
-
-  base::MessageLoopForUI message_loop;
-
-  ui::OzonePlatform::InitializeForUI();
-  if (!gfx::GLSurface::InitializeOneOff())
-    LOG(FATAL) << "Failed to initialize GL";
-
-  DemoWindow window;
-
-  scoped_refptr<gfx::GLSurface> surface =
-      gfx::GLSurface::CreateViewGLSurface(window.GetAcceleratedWidget());
-  if (!surface)
-    LOG(FATAL) << "Failed to create GL surface";
-
-  scoped_refptr<gfx::GLContext> context = gfx::GLContext::CreateGLContext(
-      NULL, surface.get(), gfx::PreferIntegratedGpu);
-  if (!context)
-    LOG(FATAL) << "Failed to create GL context";
-
-  gfx::Size window_size = window.GetSize();
-
-  int iterations = 120;
-
-  surface->Resize(window_size);
-  if (!context->MakeCurrent(surface.get()))
-    LOG(FATAL) << "Failed to make current on GL context";
-
-  for (int i = 0; i < iterations; ++i) {
-    glViewport(0, 0, window_size.width(), window_size.height());
-    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-    float fraction = static_cast<float>(i) / iterations;
-    glClearColor(1 - fraction, fraction, 0.0, 1.0);
-
-    if (!surface->SwapBuffers())
-      LOG(FATAL) << "Failed to swap buffers";
-  }
-
-  return 0;
-}