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// Copyright 2010 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 "cc/texture_layer.h"
#include "cc/layer_tree_host.h"
#include "cc/texture_layer_client.h"
#include "cc/texture_layer_impl.h"
#include "cc/thread.h"
#include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
namespace cc {
static void runCallbackOnMainThread(const TextureLayer::MailboxCallback& callback, unsigned syncPoint)
{
callback.Run(syncPoint);
}
static void postCallbackToMainThread(Thread *mainThread, const TextureLayer::MailboxCallback& callback, unsigned syncPoint)
{
mainThread->postTask(base::Bind(&runCallbackOnMainThread, callback, syncPoint));
}
scoped_refptr<TextureLayer> TextureLayer::create(TextureLayerClient* client)
{
return scoped_refptr<TextureLayer>(new TextureLayer(client, false));
}
scoped_refptr<TextureLayer> TextureLayer::createForMailbox()
{
return scoped_refptr<TextureLayer>(new TextureLayer(0, true));
}
TextureLayer::TextureLayer(TextureLayerClient* client, bool usesMailbox)
: Layer()
, m_client(client)
, m_usesMailbox(usesMailbox)
, m_flipped(true)
, m_uvRect(0, 0, 1, 1)
, m_premultipliedAlpha(true)
, m_rateLimitContext(false)
, m_contextLost(false)
, m_textureId(0)
, m_contentCommitted(false)
{
m_vertexOpacity[0] = 1.0f;
m_vertexOpacity[1] = 1.0f;
m_vertexOpacity[2] = 1.0f;
m_vertexOpacity[3] = 1.0f;
}
TextureLayer::~TextureLayer()
{
if (layerTreeHost()) {
if (m_textureId)
layerTreeHost()->acquireLayerTextures();
if (m_rateLimitContext && m_client)
layerTreeHost()->stopRateLimiter(m_client->context());
}
if (!m_contentCommitted && !m_mailboxName.empty())
m_mailboxReleaseCallback.Run(0);
}
scoped_ptr<LayerImpl> TextureLayer::createLayerImpl(LayerTreeImpl* treeImpl)
{
return TextureLayerImpl::create(treeImpl, m_layerId, m_usesMailbox).PassAs<LayerImpl>();
}
void TextureLayer::setFlipped(bool flipped)
{
m_flipped = flipped;
setNeedsCommit();
}
void TextureLayer::setUVRect(const gfx::RectF& rect)
{
m_uvRect = rect;
setNeedsCommit();
}
void TextureLayer::setVertexOpacity(float bottomLeft,
float topLeft,
float topRight,
float bottomRight) {
// Indexing according to the quad vertex generation:
// 1--2
// | |
// 0--3
m_vertexOpacity[0] = bottomLeft;
m_vertexOpacity[1] = topLeft;
m_vertexOpacity[2] = topRight;
m_vertexOpacity[3] = bottomRight;
setNeedsCommit();
}
void TextureLayer::setPremultipliedAlpha(bool premultipliedAlpha)
{
m_premultipliedAlpha = premultipliedAlpha;
setNeedsCommit();
}
void TextureLayer::setRateLimitContext(bool rateLimit)
{
if (!rateLimit && m_rateLimitContext && m_client && layerTreeHost())
layerTreeHost()->stopRateLimiter(m_client->context());
m_rateLimitContext = rateLimit;
}
void TextureLayer::setTextureId(unsigned id)
{
DCHECK(!m_usesMailbox);
if (m_textureId == id)
return;
if (m_textureId && layerTreeHost())
layerTreeHost()->acquireLayerTextures();
m_textureId = id;
setNeedsCommit();
}
void TextureLayer::setTextureMailbox(const std::string& mailboxName, const MailboxCallback& callback)
{
DCHECK(m_usesMailbox);
DCHECK(mailboxName.empty() == callback.is_null());
if (m_mailboxName.compare(mailboxName) == 0)
return;
// If we never commited the mailbox, we need to release it here
if (!m_contentCommitted && !m_mailboxName.empty())
m_mailboxReleaseCallback.Run(0);
m_mailboxReleaseCallback = callback;
m_mailboxName = mailboxName;
setNeedsCommit();
}
void TextureLayer::willModifyTexture()
{
if (layerTreeHost() && (drawsContent() || m_contentCommitted)) {
layerTreeHost()->acquireLayerTextures();
m_contentCommitted = false;
}
}
void TextureLayer::setNeedsDisplayRect(const gfx::RectF& dirtyRect)
{
Layer::setNeedsDisplayRect(dirtyRect);
if (m_rateLimitContext && m_client && layerTreeHost() && drawsContent())
layerTreeHost()->startRateLimiter(m_client->context());
}
void TextureLayer::setLayerTreeHost(LayerTreeHost* host)
{
if (m_textureId && layerTreeHost() && host != layerTreeHost())
layerTreeHost()->acquireLayerTextures();
Layer::setLayerTreeHost(host);
}
bool TextureLayer::drawsContent() const
{
return (m_client || m_textureId || !m_mailboxName.empty()) && !m_contextLost && Layer::drawsContent();
}
void TextureLayer::update(ResourceUpdateQueue& queue, const OcclusionTracker*, RenderingStats&)
{
if (m_client) {
m_textureId = m_client->prepareTexture(queue);
m_contextLost = m_client->context()->getGraphicsResetStatusARB() != GL_NO_ERROR;
}
m_needsDisplay = false;
}
void TextureLayer::pushPropertiesTo(LayerImpl* layer)
{
Layer::pushPropertiesTo(layer);
TextureLayerImpl* textureLayer = static_cast<TextureLayerImpl*>(layer);
textureLayer->setFlipped(m_flipped);
textureLayer->setUVRect(m_uvRect);
textureLayer->setVertexOpacity(m_vertexOpacity);
textureLayer->setPremultipliedAlpha(m_premultipliedAlpha);
if (m_usesMailbox) {
Thread* mainThread = layerTreeHost()->proxy()->mainThread();
textureLayer->setTextureMailbox(m_mailboxName, base::Bind(&postCallbackToMainThread, mainThread, m_mailboxReleaseCallback));
} else {
textureLayer->setTextureId(m_textureId);
}
m_contentCommitted = drawsContent();
}
bool TextureLayer::blocksPendingCommit() const
{
// Double-buffered texture layers need to be blocked until they can be made
// triple-buffered. Single-buffered layers already prevent draws, so
// can block too for simplicity.
return true;
}
} // namespace cc
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