cc/CCTextureLayerImpl.cpp

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