1 // Copyright 2011 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 #ifndef CC_TREES_LAYER_TREE_HOST_COMMON_H_ 6 #define CC_TREES_LAYER_TREE_HOST_COMMON_H_ 7 8 #include <limits> 9 #include <vector> 10 11 #include "base/bind.h" 12 #include "base/memory/ref_counted.h" 13 #include "cc/base/cc_export.h" 14 #include "cc/base/scoped_ptr_vector.h" 15 #include "cc/layers/layer_lists.h" 16 #include "ui/gfx/rect.h" 17 #include "ui/gfx/transform.h" 18 #include "ui/gfx/vector2d.h" 19 20 namespace cc { 21 22 class LayerImpl; 23 class Layer; 24 25 class CC_EXPORT LayerTreeHostCommon { 26 public: 27 static gfx::Rect CalculateVisibleRect(const gfx::Rect& target_surface_rect, 28 const gfx::Rect& layer_bound_rect, 29 const gfx::Transform& transform); 30 31 template <typename LayerType, typename RenderSurfaceLayerListType> 32 struct CalcDrawPropsInputs { 33 public: 34 CalcDrawPropsInputs(LayerType* root_layer, 35 const gfx::Size& device_viewport_size, 36 const gfx::Transform& device_transform, 37 float device_scale_factor, 38 float page_scale_factor, 39 const LayerType* page_scale_application_layer, 40 int max_texture_size, 41 bool can_use_lcd_text, 42 bool can_render_to_separate_surface, 43 bool can_adjust_raster_scales, 44 RenderSurfaceLayerListType* render_surface_layer_list, 45 int current_render_surface_layer_list_id) 46 : root_layer(root_layer), 47 device_viewport_size(device_viewport_size), 48 device_transform(device_transform), 49 device_scale_factor(device_scale_factor), 50 page_scale_factor(page_scale_factor), 51 page_scale_application_layer(page_scale_application_layer), 52 max_texture_size(max_texture_size), 53 can_use_lcd_text(can_use_lcd_text), 54 can_render_to_separate_surface(can_render_to_separate_surface), 55 can_adjust_raster_scales(can_adjust_raster_scales), 56 render_surface_layer_list(render_surface_layer_list), 57 current_render_surface_layer_list_id( 58 current_render_surface_layer_list_id) {} 59 60 LayerType* root_layer; 61 gfx::Size device_viewport_size; 62 const gfx::Transform& device_transform; 63 float device_scale_factor; 64 float page_scale_factor; 65 const LayerType* page_scale_application_layer; 66 int max_texture_size; 67 bool can_use_lcd_text; 68 bool can_render_to_separate_surface; 69 bool can_adjust_raster_scales; 70 RenderSurfaceLayerListType* render_surface_layer_list; 71 int current_render_surface_layer_list_id; 72 }; 73 74 template <typename LayerType, typename RenderSurfaceLayerListType> 75 struct CalcDrawPropsInputsForTesting 76 : public CalcDrawPropsInputs<LayerType, RenderSurfaceLayerListType> { 77 CalcDrawPropsInputsForTesting( 78 LayerType* root_layer, 79 const gfx::Size& device_viewport_size, 80 const gfx::Transform& device_transform, 81 RenderSurfaceLayerListType* render_surface_layer_list); 82 CalcDrawPropsInputsForTesting( 83 LayerType* root_layer, 84 const gfx::Size& device_viewport_size, 85 RenderSurfaceLayerListType* render_surface_layer_list); 86 87 private: 88 const gfx::Transform identity_transform_; 89 }; 90 91 typedef CalcDrawPropsInputs<Layer, RenderSurfaceLayerList> 92 CalcDrawPropsMainInputs; 93 typedef CalcDrawPropsInputsForTesting<Layer, RenderSurfaceLayerList> 94 CalcDrawPropsMainInputsForTesting; 95 static void CalculateDrawProperties(CalcDrawPropsMainInputs* inputs); 96 97 typedef CalcDrawPropsInputs<LayerImpl, LayerImplList> CalcDrawPropsImplInputs; 98 typedef CalcDrawPropsInputsForTesting<LayerImpl, LayerImplList> 99 CalcDrawPropsImplInputsForTesting; 100 static void CalculateDrawProperties(CalcDrawPropsImplInputs* inputs); 101 102 template <typename LayerType> 103 static bool RenderSurfaceContributesToTarget(LayerType*, 104 int target_surface_layer_id); 105 106 template <typename LayerType> 107 static void CallFunctionForSubtree( 108 LayerType* root_layer, 109 const base::Callback<void(LayerType* layer)>& function); 110 111 // Returns a layer with the given id if one exists in the subtree starting 112 // from the given root layer (including mask and replica layers). 113 template <typename LayerType> 114 static LayerType* FindLayerInSubtree(LayerType* root_layer, int layer_id); 115 116 static Layer* get_layer_as_raw_ptr(const LayerList& layers, size_t index) { 117 return layers[index].get(); 118 } 119 120 static LayerImpl* get_layer_as_raw_ptr(const OwnedLayerImplList& layers, 121 size_t index) { 122 return layers[index]; 123 } 124 125 static LayerImpl* get_layer_as_raw_ptr(const LayerImplList& layers, 126 size_t index) { 127 return layers[index]; 128 } 129 130 struct ScrollUpdateInfo { 131 int layer_id; 132 gfx::Vector2d scroll_delta; 133 }; 134 }; 135 136 struct CC_EXPORT ScrollAndScaleSet { 137 ScrollAndScaleSet(); 138 ~ScrollAndScaleSet(); 139 140 std::vector<LayerTreeHostCommon::ScrollUpdateInfo> scrolls; 141 float page_scale_delta; 142 }; 143 144 template <typename LayerType> 145 bool LayerTreeHostCommon::RenderSurfaceContributesToTarget( 146 LayerType* layer, 147 int target_surface_layer_id) { 148 // A layer will either contribute its own content, or its render surface's 149 // content, to the target surface. The layer contributes its surface's content 150 // when both the following are true: 151 // (1) The layer actually has a render surface, and 152 // (2) The layer's render surface is not the same as the target surface. 153 // 154 // Otherwise, the layer just contributes itself to the target surface. 155 156 return layer->render_surface() && layer->id() != target_surface_layer_id; 157 } 158 159 template <typename LayerType> 160 LayerType* LayerTreeHostCommon::FindLayerInSubtree(LayerType* root_layer, 161 int layer_id) { 162 if (!root_layer) 163 return NULL; 164 165 if (root_layer->id() == layer_id) 166 return root_layer; 167 168 if (root_layer->mask_layer() && root_layer->mask_layer()->id() == layer_id) 169 return root_layer->mask_layer(); 170 171 if (root_layer->replica_layer() && 172 root_layer->replica_layer()->id() == layer_id) 173 return root_layer->replica_layer(); 174 175 for (size_t i = 0; i < root_layer->children().size(); ++i) { 176 if (LayerType* found = FindLayerInSubtree( 177 get_layer_as_raw_ptr(root_layer->children(), i), layer_id)) 178 return found; 179 } 180 return NULL; 181 } 182 183 template <typename LayerType> 184 void LayerTreeHostCommon::CallFunctionForSubtree( 185 LayerType* root_layer, 186 const base::Callback<void(LayerType* layer)>& function) { 187 function.Run(root_layer); 188 189 if (LayerType* mask_layer = root_layer->mask_layer()) 190 function.Run(mask_layer); 191 if (LayerType* replica_layer = root_layer->replica_layer()) { 192 function.Run(replica_layer); 193 if (LayerType* mask_layer = replica_layer->mask_layer()) 194 function.Run(mask_layer); 195 } 196 197 for (size_t i = 0; i < root_layer->children().size(); ++i) { 198 CallFunctionForSubtree(get_layer_as_raw_ptr(root_layer->children(), i), 199 function); 200 } 201 } 202 203 template <typename LayerType, typename RenderSurfaceLayerListType> 204 LayerTreeHostCommon::CalcDrawPropsInputsForTesting<LayerType, 205 RenderSurfaceLayerListType>:: 206 CalcDrawPropsInputsForTesting( 207 LayerType* root_layer, 208 const gfx::Size& device_viewport_size, 209 const gfx::Transform& device_transform, 210 RenderSurfaceLayerListType* render_surface_layer_list) 211 : CalcDrawPropsInputs<LayerType, RenderSurfaceLayerListType>( 212 root_layer, 213 device_viewport_size, 214 device_transform, 215 1.f, 216 1.f, 217 NULL, 218 std::numeric_limits<int>::max() / 2, 219 false, 220 true, 221 false, 222 render_surface_layer_list, 223 0) { 224 DCHECK(root_layer); 225 DCHECK(render_surface_layer_list); 226 } 227 228 template <typename LayerType, typename RenderSurfaceLayerListType> 229 LayerTreeHostCommon::CalcDrawPropsInputsForTesting<LayerType, 230 RenderSurfaceLayerListType>:: 231 CalcDrawPropsInputsForTesting( 232 LayerType* root_layer, 233 const gfx::Size& device_viewport_size, 234 RenderSurfaceLayerListType* render_surface_layer_list) 235 : CalcDrawPropsInputs<LayerType, RenderSurfaceLayerListType>( 236 root_layer, 237 device_viewport_size, 238 identity_transform_, 239 1.f, 240 1.f, 241 NULL, 242 std::numeric_limits<int>::max() / 2, 243 false, 244 true, 245 false, 246 render_surface_layer_list, 247 0) { 248 DCHECK(root_layer); 249 DCHECK(render_surface_layer_list); 250 } 251 252 } // namespace cc 253 254 #endif // CC_TREES_LAYER_TREE_HOST_COMMON_H_ 255
