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// Copyright (c) 2011 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/gfx/compositor/compositor_cc.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebCompositor.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFloatPoint.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebSize.h"
#include "ui/gfx/compositor/layer.h"
#include "ui/gfx/gl/gl_context.h"
#include "ui/gfx/gl/gl_surface.h"
#include "ui/gfx/gl/gl_implementation.h"
#include "webkit/glue/webthread_impl.h"
#include "webkit/gpu/webgraphicscontext3d_in_process_impl.h"
namespace {
webkit_glue::WebThreadImpl* g_compositor_thread = NULL;
} // anonymous namespace
namespace ui {
SharedResourcesCC::SharedResourcesCC() : initialized_(false) {
}
SharedResourcesCC::~SharedResourcesCC() {
}
// static
SharedResourcesCC* SharedResourcesCC::GetInstance() {
// We use LeakySingletonTraits so that we don't race with
// the tear down of the gl_bindings.
SharedResourcesCC* instance = Singleton<SharedResourcesCC,
LeakySingletonTraits<SharedResourcesCC> >::get();
if (instance->Initialize()) {
return instance;
} else {
instance->Destroy();
return NULL;
}
}
bool SharedResourcesCC::Initialize() {
if (initialized_)
return true;
{
// The following line of code exists soley to disable IO restrictions
// on this thread long enough to perform the GL bindings.
// TODO(wjmaclean) Remove this when GL initialisation cleaned up.
base::ThreadRestrictions::ScopedAllowIO allow_io;
if (!gfx::GLSurface::InitializeOneOff() ||
gfx::GetGLImplementation() == gfx::kGLImplementationNone) {
LOG(ERROR) << "Could not load the GL bindings";
return false;
}
}
surface_ = gfx::GLSurface::CreateOffscreenGLSurface(false, gfx::Size(1, 1));
if (!surface_.get()) {
LOG(ERROR) << "Unable to create offscreen GL surface.";
return false;
}
context_ = gfx::GLContext::CreateGLContext(
NULL, surface_.get(), gfx::PreferIntegratedGpu);
if (!context_.get()) {
LOG(ERROR) << "Unable to create GL context.";
return false;
}
initialized_ = true;
return true;
}
void SharedResourcesCC::Destroy() {
context_ = NULL;
surface_ = NULL;
initialized_ = false;
}
bool SharedResourcesCC::MakeSharedContextCurrent() {
DCHECK(initialized_);
return context_->MakeCurrent(surface_.get());
}
void* SharedResourcesCC::GetDisplay() {
return surface_->GetDisplay();
}
gfx::GLShareGroup* SharedResourcesCC::GetShareGroup() {
DCHECK(initialized_);
return context_->share_group();
}
TextureCC::TextureCC()
: texture_id_(0),
flipped_(false) {
}
void TextureCC::SetCanvas(const SkCanvas& canvas,
const gfx::Point& origin,
const gfx::Size& overall_size) {
NOTREACHED();
}
void TextureCC::Draw(const ui::TextureDrawParams& params,
const gfx::Rect& clip_bounds_in_texture) {
NOTREACHED();
}
CompositorCC::CompositorCC(CompositorDelegate* delegate,
gfx::AcceleratedWidget widget,
const gfx::Size& size)
: Compositor(delegate, size),
widget_(widget),
root_web_layer_(WebKit::WebLayer::create(this)) {
WebKit::WebLayerTreeView::Settings settings;
settings.enableCompositorThread = !!g_compositor_thread;
host_ = WebKit::WebLayerTreeView::create(this, root_web_layer_, settings);
root_web_layer_.setAnchorPoint(WebKit::WebFloatPoint(0.f, 0.f));
OnWidgetSizeChanged();
}
CompositorCC::~CompositorCC() {
}
void CompositorCC::InitializeThread() {
g_compositor_thread = new webkit_glue::WebThreadImpl("Browser Compositor");
WebKit::WebCompositor::setThread(g_compositor_thread);
}
void CompositorCC::TerminateThread() {
DCHECK(g_compositor_thread);
delete g_compositor_thread;
g_compositor_thread = NULL;
}
Texture* CompositorCC::CreateTexture() {
NOTREACHED();
return NULL;
}
void CompositorCC::Blur(const gfx::Rect& bounds) {
NOTIMPLEMENTED();
}
void CompositorCC::ScheduleDraw() {
if (g_compositor_thread)
host_.composite();
else
Compositor::ScheduleDraw();
}
void CompositorCC::OnNotifyStart(bool clear) {
}
void CompositorCC::OnNotifyEnd() {
}
void CompositorCC::OnWidgetSizeChanged() {
host_.setViewportSize(size());
root_web_layer_.setBounds(size());
}
void CompositorCC::OnRootLayerChanged() {
root_web_layer_.removeAllChildren();
root_web_layer_.addChild(root_layer()->web_layer());
}
void CompositorCC::DrawTree() {
host_.composite();
}
void CompositorCC::ReadPixels(SkBitmap* bitmap) {
NOTIMPLEMENTED();
}
void CompositorCC::animateAndLayout(double frameBeginTime) {
}
void CompositorCC::applyScrollDelta(const WebKit::WebSize&) {
}
WebKit::WebGraphicsContext3D* CompositorCC::createContext3D() {
gfx::GLShareGroup* share_group =
SharedResourcesCC::GetInstance()->GetShareGroup();
WebKit::WebGraphicsContext3D* context =
new webkit::gpu::WebGraphicsContext3DInProcessImpl(widget_, share_group);
WebKit::WebGraphicsContext3D::Attributes attrs;
context->initialize(attrs, 0, true);
return context;
}
void CompositorCC::didRebindGraphicsContext(bool success) {
}
void CompositorCC::scheduleComposite() {
ScheduleDraw();
}
void CompositorCC::notifyNeedsComposite() {
ScheduleDraw();
}
Compositor* Compositor::Create(CompositorDelegate* owner,
gfx::AcceleratedWidget widget,
const gfx::Size& size) {
return new CompositorCC(owner, widget, size);
}
} // namespace ui
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