cc/io_surface_layer_impl.cc

   1 // Copyright 2012 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 "CCIOSurfaceLayerImpl.h"
   8
   9 #include "base/stringprintf.h"
  10 #include "CCGraphicsContext.h"
  11 #include "CCIOSurfaceDrawQuad.h"
  12 #include "CCLayerTreeHostImpl.h"
  13 #include "CCQuadSink.h"
  14 #include "CCRendererGL.h" // For the GLC() macro.
  15 #include "Extensions3D.h"
  16 #include <public/WebGraphicsContext3D.h>
  17
  18 namespace cc {
  19
  20 CCIOSurfaceLayerImpl::CCIOSurfaceLayerImpl(int id)
  21     : CCLayerImpl(id)
  22     , m_ioSurfaceId(0)
  23     , m_ioSurfaceChanged(false)
  24     , m_ioSurfaceTextureId(0)
  25 {
  26 }
  27
  28 CCIOSurfaceLayerImpl::~CCIOSurfaceLayerImpl()
  29 {
  30     if (!m_ioSurfaceTextureId)
  31         return;
  32
  33     CCGraphicsContext* context = layerTreeHostImpl()->context();
  34     // FIXME: Implement this path for software compositing.
  35     WebKit::WebGraphicsContext3D* context3d = context->context3D();
  36     if (context3d)
  37         context3d->deleteTexture(m_ioSurfaceTextureId);
  38 }
  39
  40 void CCIOSurfaceLayerImpl::willDraw(CCResourceProvider* resourceProvider)
  41 {
  42     CCLayerImpl::willDraw(resourceProvider);
  43
  44     if (m_ioSurfaceChanged) {
  45         WebKit::WebGraphicsContext3D* context3d = resourceProvider->graphicsContext3D();
  46         if (!context3d) {
  47             // FIXME: Implement this path for software compositing.
  48             return;
  49         }
  50
  51         // FIXME: Do this in a way that we can track memory usage.
  52         if (!m_ioSurfaceTextureId)
  53             m_ioSurfaceTextureId = context3d->createTexture();
  54
  55         GLC(context3d, context3d->activeTexture(GraphicsContext3D::TEXTURE0));
  56         GLC(context3d, context3d->bindTexture(Extensions3D::TEXTURE_RECTANGLE_ARB, m_ioSurfaceTextureId));
  57         GLC(context3d, context3d->texParameteri(Extensions3D::TEXTURE_RECTANGLE_ARB, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR));
  58         GLC(context3d, context3d->texParameteri(Extensions3D::TEXTURE_RECTANGLE_ARB, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::LINEAR));
  59         GLC(context3d, context3d->texParameteri(Extensions3D::TEXTURE_RECTANGLE_ARB, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE));
  60         GLC(context3d, context3d->texParameteri(Extensions3D::TEXTURE_RECTANGLE_ARB, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE));
  61         context3d->texImageIOSurface2DCHROMIUM(Extensions3D::TEXTURE_RECTANGLE_ARB,
  62                                                m_ioSurfaceSize.width(),
  63                                                m_ioSurfaceSize.height(),
  64                                                m_ioSurfaceId,
  65                                                0);
  66         // Do not check for error conditions. texImageIOSurface2DCHROMIUM is supposed to hold on to
  67         // the last good IOSurface if the new one is already closed. This is only a possibility
  68         // during live resizing of plugins. However, it seems that this is not sufficient to
  69         // completely guard against garbage being drawn. If this is found to be a significant issue,
  70         // it may be necessary to explicitly tell the embedder when to free the surfaces it has
  71         // allocated.
  72         m_ioSurfaceChanged = false;
  73     }
  74 }
  75
  76 void CCIOSurfaceLayerImpl::appendQuads(CCQuadSink& quadSink, CCAppendQuadsData& appendQuadsData)
  77 {
  78     CCSharedQuadState* sharedQuadState = quadSink.useSharedQuadState(createSharedQuadState());
  79     appendDebugBorderQuad(quadSink, sharedQuadState, appendQuadsData);
  80
  81     IntRect quadRect(IntPoint(), contentBounds());
  82     quadSink.append(CCIOSurfaceDrawQuad::create(sharedQuadState, quadRect, m_ioSurfaceSize, m_ioSurfaceTextureId, CCIOSurfaceDrawQuad::Flipped).PassAs<CCDrawQuad>(), appendQuadsData);
  83 }
  84
  85 void CCIOSurfaceLayerImpl::dumpLayerProperties(std::string* str, int indent) const
  86 {
  87     str->append(indentString(indent));
  88     base::StringAppendF(str, "iosurface id: %u texture id: %u\n", m_ioSurfaceId, m_ioSurfaceTextureId);
  89     CCLayerImpl::dumpLayerProperties(str, indent);
  90 }
  91
  92 void CCIOSurfaceLayerImpl::didLoseContext()
  93 {
  94     // We don't have a valid texture ID in the new context; however,
  95     // the IOSurface is still valid.
  96     m_ioSurfaceTextureId = 0;
  97     m_ioSurfaceChanged = true;
  98 }
  99
 100 void CCIOSurfaceLayerImpl::setIOSurfaceProperties(unsigned ioSurfaceId, const IntSize& size)
 101 {
 102     if (m_ioSurfaceId != ioSurfaceId)
 103         m_ioSurfaceChanged = true;
 104
 105     m_ioSurfaceId = ioSurfaceId;
 106     m_ioSurfaceSize = size;
 107 }
 108
 109 const char* CCIOSurfaceLayerImpl::layerTypeAsString() const
 110 {
 111     return "IOSurfaceLayer";
 112 }
 113
 114 }