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