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/quads/texture_draw_quad.h"
  11 #include "cc/trees/layer_tree_impl.h"
  12 #include "cc/trees/occlusion.h"
  13 #include "ui/gfx/geometry/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());
  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(
  95     RenderPass* render_pass,
  96     const Occlusion& occlusion_in_content_space,
  97     AppendQuadsData* append_quads_data) {
  98   SharedQuadState* shared_quad_state =
  99       render_pass->CreateAndAppendSharedQuadState();
 100   PopulateSharedQuadState(shared_quad_state);
 101
 102   AppendDebugBorderQuad(
 103       render_pass, content_bounds(), shared_quad_state, append_quads_data);
 104
 105   if (!ui_resource_id_)
 106     return;
 107
 108   ResourceProvider::ResourceId resource =
 109       layer_tree_impl()->ResourceIdForUIResource(ui_resource_id_);
 110
 111   if (!resource)
 112     return;
 113
 114   static const bool flipped = false;
 115   static const bool premultiplied_alpha = true;
 116
 117   DCHECK(!bounds().IsEmpty());
 118
 119   bool opaque = layer_tree_impl()->IsUIResourceOpaque(ui_resource_id_) ||
 120                 contents_opaque();
 121
 122   gfx::Rect quad_rect(bounds());
 123   gfx::Rect opaque_rect(opaque ? quad_rect : gfx::Rect());
 124   gfx::Rect visible_quad_rect =
 125       occlusion_in_content_space.GetUnoccludedContentRect(quad_rect);
 126   if (visible_quad_rect.IsEmpty())
 127     return;
 128
 129   TextureDrawQuad* quad =
 130       render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 131   quad->SetNew(shared_quad_state,
 132                quad_rect,
 133                opaque_rect,
 134                visible_quad_rect,
 135                resource,
 136                premultiplied_alpha,
 137                uv_top_left_,
 138                uv_bottom_right_,
 139                SK_ColorTRANSPARENT,
 140                vertex_opacity_,
 141                flipped);
 142 }
 143
 144 const char* UIResourceLayerImpl::LayerTypeAsString() const {
 145   return "cc::UIResourceLayerImpl";
 146 }
 147
 148 base::DictionaryValue* UIResourceLayerImpl::LayerTreeAsJson() const {
 149   base::DictionaryValue* result = LayerImpl::LayerTreeAsJson();
 150
 151   result->Set("ImageBounds", MathUtil::AsValue(image_bounds_).release());
 152
 153   base::ListValue* list = new base::ListValue;
 154   list->AppendDouble(vertex_opacity_[0]);
 155   list->AppendDouble(vertex_opacity_[1]);
 156   list->AppendDouble(vertex_opacity_[2]);
 157   list->AppendDouble(vertex_opacity_[3]);
 158   result->Set("VertexOpacity", list);
 159
 160   result->Set("UVTopLeft", MathUtil::AsValue(uv_top_left_).release());
 161   result->Set("UVBottomRight", MathUtil::AsValue(uv_bottom_right_).release());
 162
 163   return result;
 164 }
 165
 166 }  // namespace cc