cc/blink/web_external_texture_layer_impl.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/blink/web_external_texture_layer_impl.h"
   6
   7 #include "cc/blink/web_external_bitmap_impl.h"
   8 #include "cc/blink/web_layer_impl.h"
   9 #include "cc/layers/texture_layer.h"
  10 #include "cc/resources/resource_update_queue.h"
  11 #include "cc/resources/single_release_callback.h"
  12 #include "cc/resources/texture_mailbox.h"
  13 #include "third_party/WebKit/public/platform/WebExternalTextureLayerClient.h"
  14 #include "third_party/WebKit/public/platform/WebExternalTextureMailbox.h"
  15 #include "third_party/WebKit/public/platform/WebFloatRect.h"
  16 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
  17 #include "third_party/WebKit/public/platform/WebSize.h"
  18 #include "third_party/khronos/GLES2/gl2.h"
  19
  20 using cc::TextureLayer;
  21 using cc::ResourceUpdateQueue;
  22
  23 namespace cc_blink {
  24
  25 WebExternalTextureLayerImpl::WebExternalTextureLayerImpl(
  26     blink::WebExternalTextureLayerClient* client)
  27     : client_(client) {
  28   cc::TextureLayerClient* cc_client = client_ ? this : nullptr;
  29   scoped_refptr<TextureLayer> layer =
  30       TextureLayer::CreateForMailbox(WebLayerImpl::LayerSettings(), cc_client);
  31   layer->SetIsDrawable(true);
  32   layer_.reset(new WebLayerImpl(layer));
  33 }
  34
  35 WebExternalTextureLayerImpl::~WebExternalTextureLayerImpl() {
  36   static_cast<TextureLayer*>(layer_->layer())->ClearClient();
  37 }
  38
  39 blink::WebLayer* WebExternalTextureLayerImpl::layer() {
  40   return layer_.get();
  41 }
  42
  43 void WebExternalTextureLayerImpl::clearTexture() {
  44   TextureLayer* layer = static_cast<TextureLayer*>(layer_->layer());
  45   layer->ClearTexture();
  46 }
  47
  48 void WebExternalTextureLayerImpl::setOpaque(bool opaque) {
  49   static_cast<TextureLayer*>(layer_->layer())->SetContentsOpaque(opaque);
  50 }
  51
  52 void WebExternalTextureLayerImpl::setPremultipliedAlpha(
  53     bool premultiplied_alpha) {
  54   static_cast<TextureLayer*>(layer_->layer())
  55       ->SetPremultipliedAlpha(premultiplied_alpha);
  56 }
  57
  58 void WebExternalTextureLayerImpl::setBlendBackgroundColor(bool blend) {
  59   static_cast<TextureLayer*>(layer_->layer())->SetBlendBackgroundColor(blend);
  60 }
  61
  62 void WebExternalTextureLayerImpl::setRateLimitContext(bool rate_limit) {
  63   static_cast<TextureLayer*>(layer_->layer())->SetRateLimitContext(rate_limit);
  64 }
  65
  66 void WebExternalTextureLayerImpl::setNearestNeighbor(bool nearest_neighbor) {
  67   static_cast<TextureLayer*>(layer_->layer())
  68       ->SetNearestNeighbor(nearest_neighbor);
  69 }
  70
  71 bool WebExternalTextureLayerImpl::PrepareTextureMailbox(
  72     cc::TextureMailbox* mailbox,
  73     scoped_ptr<cc::SingleReleaseCallback>* release_callback,
  74     bool use_shared_memory) {
  75   blink::WebExternalTextureMailbox client_mailbox;
  76   WebExternalBitmapImpl* bitmap = nullptr;
  77
  78   if (use_shared_memory)
  79     bitmap = AllocateBitmap();
  80   if (!client_->prepareMailbox(&client_mailbox, bitmap)) {
  81     if (bitmap)
  82       free_bitmaps_.push_back(bitmap);
  83     return false;
  84   }
  85   gpu::Mailbox name;
  86   name.SetName(client_mailbox.name);
  87   if (bitmap) {
  88     *mailbox = cc::TextureMailbox(bitmap->shared_bitmap(), bitmap->size());
  89   } else {
  90     *mailbox =
  91         cc::TextureMailbox(name, GL_TEXTURE_2D, client_mailbox.syncPoint);
  92   }
  93   mailbox->set_allow_overlay(client_mailbox.allowOverlay);
  94   mailbox->set_nearest_neighbor(client_mailbox.nearestNeighbor);
  95
  96   if (mailbox->IsValid()) {
  97     *release_callback = cc::SingleReleaseCallback::Create(
  98         base::Bind(&WebExternalTextureLayerImpl::DidReleaseMailbox,
  99                    this->AsWeakPtr(),
 100                    client_mailbox,
 101                    bitmap));
 102   }
 103
 104   return true;
 105 }
 106
 107 WebExternalBitmapImpl* WebExternalTextureLayerImpl::AllocateBitmap() {
 108   if (!free_bitmaps_.empty()) {
 109     WebExternalBitmapImpl* result = free_bitmaps_.back();
 110     free_bitmaps_.weak_erase(free_bitmaps_.end() - 1);
 111     return result;
 112   }
 113   return new WebExternalBitmapImpl;
 114 }
 115
 116 // static
 117 void WebExternalTextureLayerImpl::DidReleaseMailbox(
 118     base::WeakPtr<WebExternalTextureLayerImpl> layer,
 119     const blink::WebExternalTextureMailbox& mailbox,
 120     WebExternalBitmapImpl* bitmap,
 121     unsigned sync_point,
 122     bool lost_resource) {
 123   DCHECK(layer);
 124   blink::WebExternalTextureMailbox available_mailbox;
 125   memcpy(available_mailbox.name, mailbox.name, sizeof(available_mailbox.name));
 126   available_mailbox.syncPoint = sync_point;
 127   if (bitmap)
 128     layer->free_bitmaps_.push_back(bitmap);
 129   layer->client_->mailboxReleased(available_mailbox, lost_resource);
 130 }
 131
 132 }  // namespace cc_blink