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 "cc/io_surface_layer_impl.h"
   6
   7 #include "base/stringprintf.h"
   8 #include "cc/gl_renderer.h" // For the GLC() macro.
   9 #include "cc/io_surface_draw_quad.h"
  10 #include "cc/layer_tree_impl.h"
  11 #include "cc/output_surface.h"
  12 #include "cc/quad_sink.h"
  13 #include "gpu/GLES2/gl2extchromium.h"
  14 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
  15 #include "third_party/khronos/GLES2/gl2.h"
  16 #include "third_party/khronos/GLES2/gl2ext.h"
  17
  18 namespace cc {
  19
  20 IOSurfaceLayerImpl::IOSurfaceLayerImpl(LayerTreeImpl* treeImpl, int id)
  21     : LayerImpl(treeImpl, id)
  22     , m_ioSurfaceId(0)
  23     , m_ioSurfaceChanged(false)
  24     , m_ioSurfaceTextureId(0)
  25 {
  26 }
  27
  28 IOSurfaceLayerImpl::~IOSurfaceLayerImpl()
  29 {
  30     if (!m_ioSurfaceTextureId)
  31         return;
  32
  33     OutputSurface* outputSurface = layerTreeImpl()->output_surface();
  34     // FIXME: Implement this path for software compositing.
  35     WebKit::WebGraphicsContext3D* context3d = outputSurface->Context3D();
  36     if (context3d)
  37         context3d->deleteTexture(m_ioSurfaceTextureId);
  38 }
  39
  40 void IOSurfaceLayerImpl::willDraw(ResourceProvider* resourceProvider)
  41 {
  42     LayerImpl::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(GL_TEXTURE0));
  56         GLC(context3d, context3d->bindTexture(GL_TEXTURE_RECTANGLE_ARB, m_ioSurfaceTextureId));
  57         GLC(context3d, context3d->texParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
  58         GLC(context3d, context3d->texParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
  59         GLC(context3d, context3d->texParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
  60         GLC(context3d, context3d->texParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
  61         context3d->texImageIOSurface2DCHROMIUM(GL_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 IOSurfaceLayerImpl::appendQuads(QuadSink& quadSink, AppendQuadsData& appendQuadsData)
  77 {
  78     SharedQuadState* sharedQuadState = quadSink.useSharedQuadState(createSharedQuadState());
  79     appendDebugBorderQuad(quadSink, sharedQuadState, appendQuadsData);
  80
  81     gfx::Rect quadRect(gfx::Point(), contentBounds());
  82     gfx::Rect opaqueRect(contentsOpaque() ? quadRect : gfx::Rect());
  83     scoped_ptr<IOSurfaceDrawQuad> quad = IOSurfaceDrawQuad::Create();
  84     quad->SetNew(sharedQuadState, quadRect, opaqueRect, m_ioSurfaceSize, m_ioSurfaceTextureId, IOSurfaceDrawQuad::FLIPPED);
  85     quadSink.append(quad.PassAs<DrawQuad>(), appendQuadsData);
  86 }
  87
  88 void IOSurfaceLayerImpl::dumpLayerProperties(std::string* str, int indent) const
  89 {
  90     str->append(indentString(indent));
  91     base::StringAppendF(str, "iosurface id: %u texture id: %u\n", m_ioSurfaceId, m_ioSurfaceTextureId);
  92     LayerImpl::dumpLayerProperties(str, indent);
  93 }
  94
  95 void IOSurfaceLayerImpl::didLoseOutputSurface()
  96 {
  97     // We don't have a valid texture ID in the new context; however,
  98     // the IOSurface is still valid.
  99     m_ioSurfaceTextureId = 0;
 100     m_ioSurfaceChanged = true;
 101 }
 102
 103 void IOSurfaceLayerImpl::setIOSurfaceProperties(unsigned ioSurfaceId, const gfx::Size& size)
 104 {
 105     if (m_ioSurfaceId != ioSurfaceId)
 106         m_ioSurfaceChanged = true;
 107
 108     m_ioSurfaceId = ioSurfaceId;
 109     m_ioSurfaceSize = size;
 110 }
 111
 112 const char* IOSurfaceLayerImpl::layerTypeAsString() const
 113 {
 114     return "IOSurfaceLayer";
 115 }
 116
 117 }  // namespace cc