cc/texture_layer_impl.cc

   1 // Copyright 2011 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 "config.h"
   6
   7 #include "CCTextureLayerImpl.h"
   8
   9 #include "base/stringprintf.h"
  10 #include "CCQuadSink.h"
  11 #include "CCRenderer.h"
  12 #include "CCTextureDrawQuad.h"
  13
  14 namespace cc {
  15
  16 CCTextureLayerImpl::CCTextureLayerImpl(int id)
  17     : CCLayerImpl(id)
  18     , m_textureId(0)
  19     , m_externalTextureResource(0)
  20     , m_premultipliedAlpha(true)
  21     , m_flipped(true)
  22     , m_uvRect(0, 0, 1, 1)
  23 {
  24 }
  25
  26 CCTextureLayerImpl::~CCTextureLayerImpl()
  27 {
  28 }
  29
  30 void CCTextureLayerImpl::willDraw(CCResourceProvider* resourceProvider)
  31 {
  32     if (!m_textureId)
  33         return;
  34     ASSERT(!m_externalTextureResource);
  35     m_externalTextureResource = resourceProvider->createResourceFromExternalTexture(m_textureId);
  36 }
  37
  38 void CCTextureLayerImpl::appendQuads(CCQuadSink& quadSink, CCAppendQuadsData& appendQuadsData)
  39 {
  40     if (!m_externalTextureResource)
  41         return;
  42
  43     CCSharedQuadState* sharedQuadState = quadSink.useSharedQuadState(createSharedQuadState());
  44     appendDebugBorderQuad(quadSink, sharedQuadState, appendQuadsData);
  45
  46     IntRect quadRect(IntPoint(), contentBounds());
  47     quadSink.append(CCTextureDrawQuad::create(sharedQuadState, quadRect, m_externalTextureResource, m_premultipliedAlpha, m_uvRect, m_flipped).PassAs<CCDrawQuad>(), appendQuadsData);
  48 }
  49
  50 void CCTextureLayerImpl::didDraw(CCResourceProvider* resourceProvider)
  51 {
  52     if (!m_externalTextureResource)
  53         return;
  54     // FIXME: the following assert will not be true when sending resources to a
  55     // parent compositor. A synchronization scheme (double-buffering or
  56     // pipelining of updates) for the client will need to exist to solve this.
  57     ASSERT(!resourceProvider->inUseByConsumer(m_externalTextureResource));
  58     resourceProvider->deleteResource(m_externalTextureResource);
  59     m_externalTextureResource = 0;
  60 }
  61
  62 void CCTextureLayerImpl::dumpLayerProperties(std::string* str, int indent) const
  63 {
  64     str->append(indentString(indent));
  65     base::StringAppendF(str, "texture layer texture id: %u premultiplied: %d\n", m_textureId, m_premultipliedAlpha);
  66     CCLayerImpl::dumpLayerProperties(str, indent);
  67 }
  68
  69 void CCTextureLayerImpl::didLoseContext()
  70 {
  71     m_textureId = 0;
  72     m_externalTextureResource = 0;
  73 }
  74
  75 const char* CCTextureLayerImpl::layerTypeAsString() const
  76 {
  77     return "TextureLayer";
  78 }
  79
  80 }