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// 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 "ui/ozone/demo/gl_renderer.h"
#include "base/location.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/trace_event/trace_event.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_surface.h"
#include "ui/gl/init/gl_factory.h"
namespace ui {
GlRenderer::GlRenderer(gfx::AcceleratedWidget widget,
const scoped_refptr<gl::GLSurface>& surface,
const gfx::Size& size)
: RendererBase(widget, size), surface_(surface), weak_ptr_factory_(this) {}
GlRenderer::~GlRenderer() {
}
bool GlRenderer::Initialize() {
context_ = gl::init::CreateGLContext(nullptr, surface_.get(),
gl::GLContextAttribs());
if (!context_.get()) {
LOG(ERROR) << "Failed to create GL context";
return false;
}
surface_->Resize(size_, 1.f, true);
if (!context_->MakeCurrent(surface_.get())) {
LOG(ERROR) << "Failed to make GL context current";
return false;
}
PostRenderFrameTask(gfx::SwapResult::SWAP_ACK);
return true;
}
void GlRenderer::RenderFrame() {
TRACE_EVENT0("ozone", "GlRenderer::RenderFrame");
float fraction = NextFraction();
context_->MakeCurrent(surface_.get());
glViewport(0, 0, size_.width(), size_.height());
glClearColor(1 - fraction, fraction, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
surface_->SwapBuffersAsync(base::Bind(&GlRenderer::PostRenderFrameTask,
weak_ptr_factory_.GetWeakPtr()));
}
void GlRenderer::PostRenderFrameTask(gfx::SwapResult result) {
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE,
base::Bind(&GlRenderer::RenderFrame, weak_ptr_factory_.GetWeakPtr()));
}
} // namespace ui
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