io_surface_layer_impl.cc revision 6d86b77056ed63eb6871182f42a9fd5f07550f90 
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/layers/quad_sink.h"
9#include "cc/output/gl_renderer.h"  // For the GLC() macro.
10#include "cc/output/output_surface.h"
11#include "cc/quads/io_surface_draw_quad.h"
12#include "cc/trees/layer_tree_impl.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
18namespace cc {
19
20IOSurfaceLayerImpl::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
26IOSurfaceLayerImpl::~IOSurfaceLayerImpl() {
27  DestroyResource();
28}
29
30void 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
39scoped_ptr<LayerImpl> IOSurfaceLayerImpl::CreateLayerImpl(
40    LayerTreeImpl* tree_impl) {
41  return IOSurfaceLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
42}
43
44void 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
52bool 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
67void IOSurfaceLayerImpl::AppendQuads(QuadSink* quad_sink,
68                                     AppendQuadsData* append_quads_data) {
69  SharedQuadState* shared_quad_state = quad_sink->CreateSharedQuadState();
70  PopulateSharedQuadState(shared_quad_state);
71
72  AppendDebugBorderQuad(
73      quad_sink, content_bounds(), shared_quad_state, append_quads_data);
74
75  gfx::Rect quad_rect(content_bounds());
76  gfx::Rect opaque_rect(contents_opaque() ? quad_rect : gfx::Rect());
77  gfx::Rect visible_quad_rect = quad_sink->UnoccludedContentRect(
78      quad_rect, draw_properties().target_space_transform);
79  if (visible_quad_rect.IsEmpty())
80    return;
81
82  scoped_ptr<IOSurfaceDrawQuad> quad = IOSurfaceDrawQuad::Create();
83  quad->SetNew(shared_quad_state,
84               quad_rect,
85               opaque_rect,
86               visible_quad_rect,
87               io_surface_size_,
88               io_surface_resource_id_,
89               IOSurfaceDrawQuad::FLIPPED);
90  quad_sink->Append(quad.PassAs<DrawQuad>());
91}
92
93void IOSurfaceLayerImpl::ReleaseResources() {
94  // We don't have a valid resource ID in the new context; however,
95  // the IOSurface is still valid.
96  DestroyResource();
97  io_surface_changed_ = true;
98}
99
100void IOSurfaceLayerImpl::SetIOSurfaceProperties(unsigned io_surface_id,
101                                                const gfx::Size& size) {
102  if (io_surface_id_ != io_surface_id)
103    io_surface_changed_ = true;
104
105  io_surface_id_ = io_surface_id;
106  io_surface_size_ = size;
107}
108
109const char* IOSurfaceLayerImpl::LayerTypeAsString() const {
110  return "cc::IOSurfaceLayerImpl";
111}
112
113}  // namespace cc
114