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/gl_renderer.h"  // For the GLC() macro.
   9 #include "cc/output/output_surface.h"
  10 #include "cc/quads/io_surface_draw_quad.h"
  11 #include "cc/trees/layer_tree_impl.h"
  12 #include "cc/trees/occlusion_tracker.h"
  13 #include "gpu/GLES2/gl2extchromium.h"
  14 #include "gpu/command_buffer/client/gles2_interface.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* tree_impl, int id)
  21     : LayerImpl(tree_impl, id),
  22       io_surface_id_(0),
  23       io_surface_changed_(false),
  24       io_surface_resource_id_(0) {}
  25
  26 IOSurfaceLayerImpl::~IOSurfaceLayerImpl() {
  27   DestroyResource();
  28 }
  29
  30 void IOSurfaceLayerImpl::DestroyResource() {
  31   if (io_surface_resource_id_) {
  32     ResourceProvider* resource_provider =
  33         layer_tree_impl()->resource_provider();
  34     resource_provider->DeleteResource(io_surface_resource_id_);
  35     io_surface_resource_id_ = 0;
  36   }
  37 }
  38
  39 scoped_ptr<LayerImpl> IOSurfaceLayerImpl::CreateLayerImpl(
  40     LayerTreeImpl* tree_impl) {
  41   return IOSurfaceLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
  42 }
  43
  44 void IOSurfaceLayerImpl::PushPropertiesTo(LayerImpl* layer) {
  45   LayerImpl::PushPropertiesTo(layer);
  46
  47   IOSurfaceLayerImpl* io_surface_layer =
  48       static_cast<IOSurfaceLayerImpl*>(layer);
  49   io_surface_layer->SetIOSurfaceProperties(io_surface_id_, io_surface_size_);
  50 }
  51
  52 bool IOSurfaceLayerImpl::WillDraw(DrawMode draw_mode,
  53                                   ResourceProvider* resource_provider) {
  54   if (draw_mode != DRAW_MODE_HARDWARE)
  55     return false;
  56
  57   if (io_surface_changed_) {
  58     DestroyResource();
  59     io_surface_resource_id_ = resource_provider->CreateResourceFromIOSurface(
  60         io_surface_size_, io_surface_id_);
  61     io_surface_changed_ = false;
  62   }
  63
  64   return LayerImpl::WillDraw(draw_mode, resource_provider);
  65 }
  66
  67 void IOSurfaceLayerImpl::AppendQuads(
  68     RenderPass* render_pass,
  69     const OcclusionTracker<LayerImpl>& occlusion_tracker,
  70     AppendQuadsData* append_quads_data) {
  71   SharedQuadState* shared_quad_state =
  72       render_pass->CreateAndAppendSharedQuadState();
  73   PopulateSharedQuadState(shared_quad_state);
  74
  75   AppendDebugBorderQuad(
  76       render_pass, content_bounds(), shared_quad_state, append_quads_data);
  77
  78   gfx::Rect quad_rect(content_bounds());
  79   gfx::Rect opaque_rect(contents_opaque() ? quad_rect : gfx::Rect());
  80   gfx::Rect visible_quad_rect = occlusion_tracker.UnoccludedContentRect(
  81       quad_rect, draw_properties().target_space_transform);
  82   if (visible_quad_rect.IsEmpty())
  83     return;
  84
  85   IOSurfaceDrawQuad* quad =
  86       render_pass->CreateAndAppendDrawQuad<IOSurfaceDrawQuad>();
  87   quad->SetNew(shared_quad_state,
  88                quad_rect,
  89                opaque_rect,
  90                visible_quad_rect,
  91                io_surface_size_,
  92                io_surface_resource_id_,
  93                IOSurfaceDrawQuad::FLIPPED);
  94 }
  95
  96 void IOSurfaceLayerImpl::ReleaseResources() {
  97   // We don't have a valid resource ID in the new context; however,
  98   // the IOSurface is still valid.
  99   DestroyResource();
 100   io_surface_changed_ = true;
 101 }
 102
 103 void IOSurfaceLayerImpl::SetIOSurfaceProperties(unsigned io_surface_id,
 104                                                 const gfx::Size& size) {
 105   if (io_surface_id_ != io_surface_id)
 106     io_surface_changed_ = true;
 107
 108   io_surface_id_ = io_surface_id;
 109   io_surface_size_ = size;
 110 }
 111
 112 const char* IOSurfaceLayerImpl::LayerTypeAsString() const {
 113   return "cc::IOSurfaceLayerImpl";
 114 }
 115
 116 }  // namespace cc