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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/layers/texture_layer.h"
#include "cc/base/thread.h"
#include "cc/layers/texture_layer_client.h"
#include "cc/layers/texture_layer_impl.h"
#include "cc/trees/layer_tree_host.h"
#include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
namespace cc {
static void RunCallbackOnMainThread(
const TextureMailbox::ReleaseCallback& callback,
unsigned sync_point) {
callback.Run(sync_point);
}
static void PostCallbackToMainThread(
Thread* main_thread,
const TextureMailbox::ReleaseCallback& callback,
unsigned sync_point) {
main_thread->PostTask(
base::Bind(&RunCallbackOnMainThread, callback, sync_point));
}
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(NULL, true));
}
TextureLayer::TextureLayer(TextureLayerClient* client, bool uses_mailbox)
: Layer(),
client_(client),
uses_mailbox_(uses_mailbox),
flipped_(true),
uv_top_left_(0.f, 0.f),
uv_bottom_right_(1.f, 1.f),
premultiplied_alpha_(true),
rate_limit_context_(false),
context_lost_(false),
texture_id_(0),
content_committed_(false),
own_mailbox_(false) {
vertex_opacity_[0] = 1.0f;
vertex_opacity_[1] = 1.0f;
vertex_opacity_[2] = 1.0f;
vertex_opacity_[3] = 1.0f;
}
TextureLayer::~TextureLayer() {
if (layer_tree_host()) {
if (texture_id_)
layer_tree_host()->AcquireLayerTextures();
if (rate_limit_context_ && client_)
layer_tree_host()->StopRateLimiter(client_->Context3d());
}
if (own_mailbox_)
texture_mailbox_.RunReleaseCallback(texture_mailbox_.sync_point());
}
scoped_ptr<LayerImpl> TextureLayer::CreateLayerImpl(LayerTreeImpl* tree_impl) {
return TextureLayerImpl::Create(tree_impl, id(), uses_mailbox_).
PassAs<LayerImpl>();
}
void TextureLayer::SetFlipped(bool flipped) {
flipped_ = flipped;
SetNeedsCommit();
}
void TextureLayer::SetUV(gfx::PointF top_left, gfx::PointF bottom_right) {
uv_top_left_ = top_left;
uv_bottom_right_ = bottom_right;
SetNeedsCommit();
}
void TextureLayer::SetVertexOpacity(float bottom_left,
float top_left,
float top_right,
float bottom_right) {
// Indexing according to the quad vertex generation:
// 1--2
// | |
// 0--3
vertex_opacity_[0] = bottom_left;
vertex_opacity_[1] = top_left;
vertex_opacity_[2] = top_right;
vertex_opacity_[3] = bottom_right;
SetNeedsCommit();
}
void TextureLayer::SetPremultipliedAlpha(bool premultiplied_alpha) {
premultiplied_alpha_ = premultiplied_alpha;
SetNeedsCommit();
}
void TextureLayer::SetRateLimitContext(bool rate_limit) {
if (!rate_limit && rate_limit_context_ && client_ && layer_tree_host())
layer_tree_host()->StopRateLimiter(client_->Context3d());
rate_limit_context_ = rate_limit;
}
void TextureLayer::SetTextureId(unsigned id) {
DCHECK(!uses_mailbox_);
if (texture_id_ == id)
return;
if (texture_id_ && layer_tree_host())
layer_tree_host()->AcquireLayerTextures();
texture_id_ = id;
SetNeedsCommit();
}
void TextureLayer::SetTextureMailbox(const TextureMailbox& mailbox) {
DCHECK(uses_mailbox_);
DCHECK(mailbox.IsEmpty() || !mailbox.Equals(texture_mailbox_));
// If we never commited the mailbox, we need to release it here
if (own_mailbox_)
texture_mailbox_.RunReleaseCallback(texture_mailbox_.sync_point());
texture_mailbox_ = mailbox;
own_mailbox_ = true;
SetNeedsCommit();
}
void TextureLayer::WillModifyTexture() {
if (layer_tree_host() && (DrawsContent() || content_committed_)) {
layer_tree_host()->AcquireLayerTextures();
content_committed_ = false;
}
}
void TextureLayer::SetNeedsDisplayRect(const gfx::RectF& dirty_rect) {
Layer::SetNeedsDisplayRect(dirty_rect);
if (rate_limit_context_ && client_ && layer_tree_host() && DrawsContent())
layer_tree_host()->StartRateLimiter(client_->Context3d());
}
void TextureLayer::SetLayerTreeHost(LayerTreeHost* host) {
if (texture_id_ && layer_tree_host() && host != layer_tree_host())
layer_tree_host()->AcquireLayerTextures();
Layer::SetLayerTreeHost(host);
}
bool TextureLayer::DrawsContent() const {
return (client_ || texture_id_ || !texture_mailbox_.IsEmpty()) &&
!context_lost_ && Layer::DrawsContent();
}
void TextureLayer::Update(ResourceUpdateQueue* queue,
const OcclusionTracker* occlusion) {
if (client_) {
texture_id_ = client_->PrepareTexture(queue);
context_lost_ =
client_->Context3d()->getGraphicsResetStatusARB() != GL_NO_ERROR;
}
needs_display_ = false;
}
void TextureLayer::PushPropertiesTo(LayerImpl* layer) {
Layer::PushPropertiesTo(layer);
TextureLayerImpl* texture_layer = static_cast<TextureLayerImpl*>(layer);
texture_layer->set_flipped(flipped_);
texture_layer->set_uv_top_left(uv_top_left_);
texture_layer->set_uv_bottom_right(uv_bottom_right_);
texture_layer->set_vertex_opacity(vertex_opacity_);
texture_layer->set_premultiplied_alpha(premultiplied_alpha_);
if (uses_mailbox_ && own_mailbox_) {
Thread* main_thread = layer_tree_host()->proxy()->MainThread();
TextureMailbox::ReleaseCallback callback;
if (!texture_mailbox_.IsEmpty())
callback = base::Bind(
&PostCallbackToMainThread, main_thread, texture_mailbox_.callback());
texture_layer->SetTextureMailbox(TextureMailbox(
texture_mailbox_.name(), callback, texture_mailbox_.sync_point()));
own_mailbox_ = false;
} else {
texture_layer->set_texture_id(texture_id_);
}
content_committed_ = 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 DrawsContent();
}
bool TextureLayer::CanClipSelf() const {
return true;
}
} // namespace cc
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