src/cc/layers/ui_resource_layer_impl.cc

   1 // Copyright 2013 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/ui_resource_layer_impl.h"
   6
   7 #include "base/strings/stringprintf.h"
   8 #include "base/values.h"
   9 #include "cc/base/math_util.h"
  10 #include "cc/layers/quad_sink.h"
  11 #include "cc/quads/texture_draw_quad.h"
  12 #include "cc/trees/layer_tree_impl.h"
  13 #include "ui/gfx/rect_f.h"
  14
  15 namespace cc {
  16
  17 UIResourceLayerImpl::UIResourceLayerImpl(LayerTreeImpl* tree_impl, int id)
  18     : LayerImpl(tree_impl, id),
  19       ui_resource_id_(0),
  20       uv_top_left_(0.f, 0.f),
  21       uv_bottom_right_(1.f, 1.f) {
  22   vertex_opacity_[0] = 1.0f;
  23   vertex_opacity_[1] = 1.0f;
  24   vertex_opacity_[2] = 1.0f;
  25   vertex_opacity_[3] = 1.0f;
  26 }
  27
  28 UIResourceLayerImpl::~UIResourceLayerImpl() {}
  29
  30 scoped_ptr<LayerImpl> UIResourceLayerImpl::CreateLayerImpl(
  31     LayerTreeImpl* tree_impl) {
  32   return UIResourceLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
  33 }
  34
  35 void UIResourceLayerImpl::PushPropertiesTo(LayerImpl* layer) {
  36   LayerImpl::PushPropertiesTo(layer);
  37   UIResourceLayerImpl* layer_impl = static_cast<UIResourceLayerImpl*>(layer);
  38
  39   layer_impl->SetUIResourceId(ui_resource_id_);
  40   layer_impl->SetImageBounds(image_bounds_);
  41   layer_impl->SetUV(uv_top_left_, uv_bottom_right_);
  42   layer_impl->SetVertexOpacity(vertex_opacity_);
  43 }
  44
  45 void UIResourceLayerImpl::SetUIResourceId(UIResourceId uid) {
  46   if (uid == ui_resource_id_)
  47     return;
  48   ui_resource_id_ = uid;
  49   NoteLayerPropertyChanged();
  50 }
  51
  52 void UIResourceLayerImpl::SetImageBounds(const gfx::Size& image_bounds) {
  53   // This check imposes an ordering on the call sequence.  An UIResource must
  54   // exist before SetImageBounds can be called.
  55   DCHECK(ui_resource_id_);
  56
  57   if (image_bounds_ == image_bounds)
  58     return;
  59
  60   image_bounds_ = image_bounds;
  61
  62   NoteLayerPropertyChanged();
  63 }
  64
  65 void UIResourceLayerImpl::SetUV(const gfx::PointF& top_left,
  66                                 const gfx::PointF& bottom_right) {
  67   if (uv_top_left_ == top_left && uv_bottom_right_ == bottom_right)
  68     return;
  69   uv_top_left_ = top_left;
  70   uv_bottom_right_ = bottom_right;
  71   NoteLayerPropertyChanged();
  72 }
  73
  74 void UIResourceLayerImpl::SetVertexOpacity(const float vertex_opacity[4]) {
  75   if (vertex_opacity_[0] == vertex_opacity[0] &&
  76       vertex_opacity_[1] == vertex_opacity[1] &&
  77       vertex_opacity_[2] == vertex_opacity[2] &&
  78       vertex_opacity_[3] == vertex_opacity[3])
  79     return;
  80   vertex_opacity_[0] = vertex_opacity[0];
  81   vertex_opacity_[1] = vertex_opacity[1];
  82   vertex_opacity_[2] = vertex_opacity[2];
  83   vertex_opacity_[3] = vertex_opacity[3];
  84   NoteLayerPropertyChanged();
  85 }
  86
  87 bool UIResourceLayerImpl::WillDraw(DrawMode draw_mode,
  88                                   ResourceProvider* resource_provider) {
  89   if (!ui_resource_id_ || draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
  90     return false;
  91   return LayerImpl::WillDraw(draw_mode, resource_provider);
  92 }
  93
  94 void UIResourceLayerImpl::AppendQuads(QuadSink* quad_sink,
  95                                      AppendQuadsData* append_quads_data) {
  96   SharedQuadState* shared_quad_state = quad_sink->CreateSharedQuadState();
  97   PopulateSharedQuadState(shared_quad_state);
  98
  99   AppendDebugBorderQuad(quad_sink, shared_quad_state, append_quads_data);
 100
 101   if (!ui_resource_id_)
 102     return;
 103
 104   ResourceProvider::ResourceId resource =
 105       layer_tree_impl()->ResourceIdForUIResource(ui_resource_id_);
 106
 107   if (!resource)
 108     return;
 109
 110   static const bool flipped = false;
 111   static const bool premultiplied_alpha = true;
 112
 113   DCHECK(!bounds().IsEmpty());
 114
 115   bool opaque = layer_tree_impl()->IsUIResourceOpaque(ui_resource_id_) ||
 116                 contents_opaque();
 117
 118   gfx::Rect quad_rect(bounds());
 119   gfx::Rect opaque_rect(opaque ? quad_rect : gfx::Rect());
 120   gfx::Rect visible_quad_rect = quad_sink->UnoccludedContentRect(
 121       quad_rect, draw_properties().target_space_transform);
 122   if (visible_quad_rect.IsEmpty())
 123     return;
 124
 125   scoped_ptr<TextureDrawQuad> quad = TextureDrawQuad::Create();
 126   quad->SetNew(shared_quad_state,
 127                quad_rect,
 128                opaque_rect,
 129                visible_quad_rect,
 130                resource,
 131                premultiplied_alpha,
 132                uv_top_left_,
 133                uv_bottom_right_,
 134                SK_ColorTRANSPARENT,
 135                vertex_opacity_,
 136                flipped);
 137   quad_sink->Append(quad.PassAs<DrawQuad>());
 138 }
 139
 140 const char* UIResourceLayerImpl::LayerTypeAsString() const {
 141   return "cc::UIResourceLayerImpl";
 142 }
 143
 144 base::DictionaryValue* UIResourceLayerImpl::LayerTreeAsJson() const {
 145   base::DictionaryValue* result = LayerImpl::LayerTreeAsJson();
 146
 147   result->Set("ImageBounds", MathUtil::AsValue(image_bounds_).release());
 148
 149   base::ListValue* list = new base::ListValue;
 150   list->AppendDouble(vertex_opacity_[0]);
 151   list->AppendDouble(vertex_opacity_[1]);
 152   list->AppendDouble(vertex_opacity_[2]);
 153   list->AppendDouble(vertex_opacity_[3]);
 154   result->Set("VertexOpacity", list);
 155
 156   result->Set("UVTopLeft", MathUtil::AsValue(uv_top_left_).release());
 157   result->Set("UVBottomRight", MathUtil::AsValue(uv_bottom_right_).release());
 158
 159   return result;
 160 }
 161
 162 }  // namespace cc