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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 "cc/blink/web_external_texture_layer_impl.h"
#include "cc/blink/web_external_bitmap_impl.h"
#include "cc/blink/web_layer_impl.h"
#include "cc/layers/texture_layer.h"
#include "cc/resources/single_release_callback.h"
#include "cc/resources/texture_mailbox.h"
#include "third_party/WebKit/public/platform/WebExternalTextureLayerClient.h"
#include "third_party/WebKit/public/platform/WebExternalTextureMailbox.h"
#include "third_party/WebKit/public/platform/WebFloatRect.h"
#include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
#include "third_party/WebKit/public/platform/WebSize.h"
#include "third_party/khronos/GLES2/gl2.h"
using cc::TextureLayer;
namespace cc_blink {
WebExternalTextureLayerImpl::WebExternalTextureLayerImpl(
blink::WebExternalTextureLayerClient* client)
: client_(client) {
cc::TextureLayerClient* cc_client = client_ ? this : nullptr;
scoped_refptr<TextureLayer> layer = TextureLayer::CreateForMailbox(cc_client);
layer->SetIsDrawable(true);
layer_.reset(new WebLayerImpl(layer));
}
WebExternalTextureLayerImpl::~WebExternalTextureLayerImpl() {
static_cast<TextureLayer*>(layer_->layer())->ClearClient();
}
blink::WebLayer* WebExternalTextureLayerImpl::layer() {
return layer_.get();
}
void WebExternalTextureLayerImpl::clearTexture() {
TextureLayer* layer = static_cast<TextureLayer*>(layer_->layer());
layer->ClearTexture();
}
void WebExternalTextureLayerImpl::setOpaque(bool opaque) {
static_cast<TextureLayer*>(layer_->layer())->SetContentsOpaque(opaque);
}
void WebExternalTextureLayerImpl::setPremultipliedAlpha(
bool premultiplied_alpha) {
static_cast<TextureLayer*>(layer_->layer())
->SetPremultipliedAlpha(premultiplied_alpha);
}
void WebExternalTextureLayerImpl::setBlendBackgroundColor(bool blend) {
static_cast<TextureLayer*>(layer_->layer())->SetBlendBackgroundColor(blend);
}
void WebExternalTextureLayerImpl::setNearestNeighbor(bool nearest_neighbor) {
static_cast<TextureLayer*>(layer_->layer())
->SetNearestNeighbor(nearest_neighbor);
}
bool WebExternalTextureLayerImpl::PrepareTextureMailbox(
cc::TextureMailbox* mailbox,
scoped_ptr<cc::SingleReleaseCallback>* release_callback,
bool use_shared_memory) {
blink::WebExternalTextureMailbox client_mailbox;
WebExternalBitmapImpl* bitmap = nullptr;
if (use_shared_memory)
bitmap = AllocateBitmap();
if (!client_->prepareMailbox(&client_mailbox, bitmap)) {
if (bitmap)
free_bitmaps_.push_back(make_scoped_ptr(bitmap));
return false;
}
gpu::Mailbox name;
name.SetName(client_mailbox.name);
if (bitmap) {
*mailbox = cc::TextureMailbox(bitmap->shared_bitmap(), bitmap->size());
} else {
gpu::SyncToken sync_token;
static_assert(sizeof(sync_token) <= sizeof(client_mailbox.syncToken),
"Size of web external sync token too small.");
if (client_mailbox.validSyncToken)
memcpy(&sync_token, client_mailbox.syncToken, sizeof(sync_token));
gfx::Size size;
if (client_mailbox.allowOverlay) {
size = gfx::Size(client_mailbox.textureSize.width,
client_mailbox.textureSize.height);
}
*mailbox =
cc::TextureMailbox(name, sync_token, client_mailbox.textureTarget, size,
client_mailbox.allowOverlay, false);
}
mailbox->set_nearest_neighbor(client_mailbox.nearestNeighbor);
if (mailbox->IsValid()) {
*release_callback = cc::SingleReleaseCallback::Create(
base::Bind(&WebExternalTextureLayerImpl::DidReleaseMailbox,
this->AsWeakPtr(),
client_mailbox,
bitmap));
}
return true;
}
WebExternalBitmapImpl* WebExternalTextureLayerImpl::AllocateBitmap() {
if (!free_bitmaps_.empty()) {
WebExternalBitmapImpl* result = free_bitmaps_.back().release();
free_bitmaps_.pop_back();
return result;
}
return new WebExternalBitmapImpl;
}
// static
void WebExternalTextureLayerImpl::DidReleaseMailbox(
base::WeakPtr<WebExternalTextureLayerImpl> layer,
const blink::WebExternalTextureMailbox& mailbox,
WebExternalBitmapImpl* bitmap,
const gpu::SyncToken& sync_token,
bool lost_resource) {
DCHECK(layer);
blink::WebExternalTextureMailbox available_mailbox;
static_assert(sizeof(sync_token) <= sizeof(available_mailbox.syncToken),
"Size of web external sync token too small.");
memcpy(available_mailbox.name, mailbox.name, sizeof(available_mailbox.name));
memcpy(available_mailbox.syncToken, sync_token.GetConstData(),
sizeof(sync_token));
available_mailbox.validSyncToken = sync_token.HasData();
if (bitmap)
layer->free_bitmaps_.push_back(make_scoped_ptr(bitmap));
layer->client_->mailboxReleased(available_mailbox, lost_resource);
}
} // namespace cc_blink
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