cc/texture_layer.cc

   1 // Copyright 2010 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/texture_layer.h"
   6
   7 #include "cc/layer_tree_host.h"
   8 #include "cc/texture_layer_client.h"
   9 #include "cc/texture_layer_impl.h"
  10 #include "cc/thread.h"
  11 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
  12
  13 namespace cc {
  14
  15 static void runCallbackOnMainThread(const TextureLayer::MailboxCallback& callback, unsigned syncPoint)
  16 {
  17     callback.Run(syncPoint);
  18 }
  19
  20 static void postCallbackToMainThread(Thread *mainThread, const TextureLayer::MailboxCallback& callback, unsigned syncPoint)
  21 {
  22     mainThread->postTask(base::Bind(&runCallbackOnMainThread, callback, syncPoint));
  23 }
  24
  25 scoped_refptr<TextureLayer> TextureLayer::create(TextureLayerClient* client)
  26 {
  27     return scoped_refptr<TextureLayer>(new TextureLayer(client, false));
  28 }
  29
  30 scoped_refptr<TextureLayer> TextureLayer::createForMailbox()
  31 {
  32     return scoped_refptr<TextureLayer>(new TextureLayer(0, true));
  33 }
  34
  35 TextureLayer::TextureLayer(TextureLayerClient* client, bool usesMailbox)
  36     : Layer()
  37     , m_client(client)
  38     , m_usesMailbox(usesMailbox)
  39     , m_flipped(true)
  40     , m_uvRect(0, 0, 1, 1)
  41     , m_premultipliedAlpha(true)
  42     , m_rateLimitContext(false)
  43     , m_contextLost(false)
  44     , m_textureId(0)
  45     , m_contentCommitted(false)
  46 {
  47   m_vertexOpacity[0] = 1.0f;
  48   m_vertexOpacity[1] = 1.0f;
  49   m_vertexOpacity[2] = 1.0f;
  50   m_vertexOpacity[3] = 1.0f;
  51 }
  52
  53 TextureLayer::~TextureLayer()
  54 {
  55     if (layerTreeHost()) {
  56         if (m_textureId)
  57             layerTreeHost()->acquireLayerTextures();
  58         if (m_rateLimitContext && m_client)
  59             layerTreeHost()->stopRateLimiter(m_client->context());
  60     }
  61     if (!m_contentCommitted && !m_mailboxName.empty())
  62         m_mailboxReleaseCallback.Run(0);
  63 }
  64
  65 scoped_ptr<LayerImpl> TextureLayer::createLayerImpl(LayerTreeImpl* treeImpl)
  66 {
  67     return TextureLayerImpl::create(treeImpl, m_layerId, m_usesMailbox).PassAs<LayerImpl>();
  68 }
  69
  70 void TextureLayer::setFlipped(bool flipped)
  71 {
  72     m_flipped = flipped;
  73     setNeedsCommit();
  74 }
  75
  76 void TextureLayer::setUVRect(const gfx::RectF& rect)
  77 {
  78     m_uvRect = rect;
  79     setNeedsCommit();
  80 }
  81
  82 void TextureLayer::setVertexOpacity(float bottomLeft,
  83                                     float topLeft,
  84                                     float topRight,
  85                                     float bottomRight) {
  86   // Indexing according to the quad vertex generation:
  87   // 1--2
  88   // |  |
  89   // 0--3
  90   m_vertexOpacity[0] = bottomLeft;
  91   m_vertexOpacity[1] = topLeft;
  92   m_vertexOpacity[2] = topRight;
  93   m_vertexOpacity[3] = bottomRight;
  94   setNeedsCommit();
  95 }
  96
  97 void TextureLayer::setPremultipliedAlpha(bool premultipliedAlpha)
  98 {
  99     m_premultipliedAlpha = premultipliedAlpha;
 100     setNeedsCommit();
 101 }
 102
 103 void TextureLayer::setRateLimitContext(bool rateLimit)
 104 {
 105     if (!rateLimit && m_rateLimitContext && m_client && layerTreeHost())
 106         layerTreeHost()->stopRateLimiter(m_client->context());
 107
 108     m_rateLimitContext = rateLimit;
 109 }
 110
 111 void TextureLayer::setTextureId(unsigned id)
 112 {
 113     DCHECK(!m_usesMailbox);
 114     if (m_textureId == id)
 115         return;
 116     if (m_textureId && layerTreeHost())
 117         layerTreeHost()->acquireLayerTextures();
 118     m_textureId = id;
 119     setNeedsCommit();
 120 }
 121
 122 void TextureLayer::setTextureMailbox(const std::string& mailboxName, const MailboxCallback& callback)
 123 {
 124     DCHECK(m_usesMailbox);
 125     DCHECK(mailboxName.empty() == callback.is_null());
 126     if (m_mailboxName.compare(mailboxName) == 0)
 127         return;
 128     // If we never commited the mailbox, we need to release it here
 129     if (!m_contentCommitted && !m_mailboxName.empty())
 130         m_mailboxReleaseCallback.Run(0);
 131     m_mailboxReleaseCallback = callback;
 132     m_mailboxName = mailboxName;
 133
 134     setNeedsCommit();
 135 }
 136
 137 void TextureLayer::willModifyTexture()
 138 {
 139     if (layerTreeHost() && (drawsContent() || m_contentCommitted)) {
 140         layerTreeHost()->acquireLayerTextures();
 141         m_contentCommitted = false;
 142     }
 143 }
 144
 145 void TextureLayer::setNeedsDisplayRect(const gfx::RectF& dirtyRect)
 146 {
 147     Layer::setNeedsDisplayRect(dirtyRect);
 148
 149     if (m_rateLimitContext && m_client && layerTreeHost() && drawsContent())
 150         layerTreeHost()->startRateLimiter(m_client->context());
 151 }
 152
 153 void TextureLayer::setLayerTreeHost(LayerTreeHost* host)
 154 {
 155     if (m_textureId && layerTreeHost() && host != layerTreeHost())
 156         layerTreeHost()->acquireLayerTextures();
 157     Layer::setLayerTreeHost(host);
 158 }
 159
 160 bool TextureLayer::drawsContent() const
 161 {
 162     return (m_client || m_textureId || !m_mailboxName.empty()) && !m_contextLost && Layer::drawsContent();
 163 }
 164
 165 void TextureLayer::update(ResourceUpdateQueue& queue, const OcclusionTracker*, RenderingStats&)
 166 {
 167     if (m_client) {
 168         m_textureId = m_client->prepareTexture(queue);
 169         m_contextLost = m_client->context()->getGraphicsResetStatusARB() != GL_NO_ERROR;
 170     }
 171
 172     m_needsDisplay = false;
 173 }
 174
 175 void TextureLayer::pushPropertiesTo(LayerImpl* layer)
 176 {
 177     Layer::pushPropertiesTo(layer);
 178
 179     TextureLayerImpl* textureLayer = static_cast<TextureLayerImpl*>(layer);
 180     textureLayer->setFlipped(m_flipped);
 181     textureLayer->setUVRect(m_uvRect);
 182     textureLayer->setVertexOpacity(m_vertexOpacity);
 183     textureLayer->setPremultipliedAlpha(m_premultipliedAlpha);
 184     if (m_usesMailbox) {
 185         Thread* mainThread = layerTreeHost()->proxy()->mainThread();
 186         textureLayer->setTextureMailbox(m_mailboxName, base::Bind(&postCallbackToMainThread, mainThread, m_mailboxReleaseCallback));
 187     } else {
 188         textureLayer->setTextureId(m_textureId);
 189     }
 190     m_contentCommitted = drawsContent();
 191 }
 192
 193 bool TextureLayer::blocksPendingCommit() const
 194 {
 195     // Double-buffered texture layers need to be blocked until they can be made
 196     // triple-buffered.  Single-buffered layers already prevent draws, so
 197     // can block too for simplicity.
 198     return true;
 199 }
 200
 201 }  // namespace cc