cc/layers/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/layers/io_surface_layer_impl.h"
   6
   7 #include "base/strings/stringprintf.h"
   8 #include "cc/output/output_surface.h"
   9 #include "cc/quads/io_surface_draw_quad.h"
  10 #include "cc/trees/layer_tree_impl.h"
  11 #include "cc/trees/occlusion.h"
  12
  13 namespace cc {
  14
  15 IOSurfaceLayerImpl::IOSurfaceLayerImpl(LayerTreeImpl* tree_impl, int id)
  16     : LayerImpl(tree_impl, id),
  17       io_surface_id_(0),
  18       io_surface_changed_(false),
  19       io_surface_resource_id_(0) {}
  20
  21 IOSurfaceLayerImpl::~IOSurfaceLayerImpl() {
  22   DestroyResource();
  23 }
  24
  25 void IOSurfaceLayerImpl::DestroyResource() {
  26   if (io_surface_resource_id_) {
  27     ResourceProvider* resource_provider =
  28         layer_tree_impl()->resource_provider();
  29     resource_provider->DeleteResource(io_surface_resource_id_);
  30     io_surface_resource_id_ = 0;
  31   }
  32 }
  33
  34 scoped_ptr<LayerImpl> IOSurfaceLayerImpl::CreateLayerImpl(
  35     LayerTreeImpl* tree_impl) {
  36   return IOSurfaceLayerImpl::Create(tree_impl, id());
  37 }
  38
  39 void IOSurfaceLayerImpl::PushPropertiesTo(LayerImpl* layer) {
  40   LayerImpl::PushPropertiesTo(layer);
  41
  42   IOSurfaceLayerImpl* io_surface_layer =
  43       static_cast<IOSurfaceLayerImpl*>(layer);
  44   io_surface_layer->SetIOSurfaceProperties(io_surface_id_, io_surface_size_);
  45 }
  46
  47 bool IOSurfaceLayerImpl::WillDraw(DrawMode draw_mode,
  48                                   ResourceProvider* resource_provider) {
  49   if (draw_mode != DRAW_MODE_HARDWARE)
  50     return false;
  51
  52   if (io_surface_changed_) {
  53     DestroyResource();
  54     io_surface_resource_id_ = resource_provider->CreateResourceFromIOSurface(
  55         io_surface_size_, io_surface_id_);
  56     io_surface_changed_ = false;
  57   }
  58
  59   return LayerImpl::WillDraw(draw_mode, resource_provider);
  60 }
  61
  62 void IOSurfaceLayerImpl::AppendQuads(
  63     RenderPass* render_pass,
  64     AppendQuadsData* append_quads_data) {
  65   SharedQuadState* shared_quad_state =
  66       render_pass->CreateAndAppendSharedQuadState();
  67   PopulateSharedQuadState(shared_quad_state);
  68
  69   AppendDebugBorderQuad(
  70       render_pass, content_bounds(), shared_quad_state, append_quads_data);
  71
  72   gfx::Rect quad_rect(content_bounds());
  73   gfx::Rect opaque_rect(contents_opaque() ? quad_rect : gfx::Rect());
  74   gfx::Rect visible_quad_rect =
  75       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
  76           quad_rect);
  77   if (visible_quad_rect.IsEmpty())
  78     return;
  79
  80   IOSurfaceDrawQuad* quad =
  81       render_pass->CreateAndAppendDrawQuad<IOSurfaceDrawQuad>();
  82   quad->SetNew(shared_quad_state,
  83                quad_rect,
  84                opaque_rect,
  85                visible_quad_rect,
  86                io_surface_size_,
  87                io_surface_resource_id_,
  88                IOSurfaceDrawQuad::FLIPPED);
  89   ValidateQuadResources(quad);
  90 }
  91
  92 void IOSurfaceLayerImpl::ReleaseResources() {
  93   // We don't have a valid resource ID in the new context; however,
  94   // the IOSurface is still valid.
  95   DestroyResource();
  96   io_surface_changed_ = true;
  97 }
  98
  99 void IOSurfaceLayerImpl::SetIOSurfaceProperties(unsigned io_surface_id,
 100                                                 const gfx::Size& size) {
 101   if (io_surface_id_ != io_surface_id)
 102     io_surface_changed_ = true;
 103
 104   io_surface_id_ = io_surface_id;
 105   io_surface_size_ = size;
 106 }
 107
 108 const char* IOSurfaceLayerImpl::LayerTypeAsString() const {
 109   return "cc::IOSurfaceLayerImpl";
 110 }
 111
 112 }  // namespace cc