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/test/layer_tree_json_parser.h" 6 7 #include "base/test/values_test_util.h" 8 #include "base/values.h" 9 #include "cc/layers/content_layer.h" 10 #include "cc/layers/layer.h" 11 #include "cc/layers/nine_patch_layer.h" 12 #include "cc/layers/picture_layer.h" 13 #include "cc/layers/solid_color_layer.h" 14 #include "cc/layers/texture_layer.h" 15 16 namespace cc { 17 18 namespace { 19 20 scoped_refptr<Layer> ParseTreeFromValue(base::Value* val, 21 ContentLayerClient* content_client) { 22 base::DictionaryValue* dict; 23 bool success = true; 24 success &= val->GetAsDictionary(&dict); 25 std::string layer_type; 26 success &= dict->GetString("LayerType", &layer_type); 27 base::ListValue* list; 28 success &= dict->GetList("Bounds", &list); 29 int width, height; 30 success &= list->GetInteger(0, &width); 31 success &= list->GetInteger(1, &height); 32 success &= dict->GetList("Position", &list); 33 double position_x, position_y; 34 success &= list->GetDouble(0, &position_x); 35 success &= list->GetDouble(1, &position_y); 36 37 bool draws_content; 38 success &= dict->GetBoolean("DrawsContent", &draws_content); 39 40 scoped_refptr<Layer> new_layer; 41 if (layer_type == "SolidColorLayer") { 42 new_layer = SolidColorLayer::Create(); 43 } else if (layer_type == "ContentLayer") { 44 new_layer = ContentLayer::Create(content_client); 45 } else if (layer_type == "NinePatchLayer") { 46 success &= dict->GetList("ImageAperture", &list); 47 int aperture_x, aperture_y, aperture_width, aperture_height; 48 success &= list->GetInteger(0, &aperture_x); 49 success &= list->GetInteger(1, &aperture_y); 50 success &= list->GetInteger(2, &aperture_width); 51 success &= list->GetInteger(3, &aperture_height); 52 53 base::ListValue* bounds; 54 success &= dict->GetList("ImageBounds", &bounds); 55 double image_width, image_height; 56 success &= bounds->GetDouble(0, &image_width); 57 success &= bounds->GetDouble(1, &image_height); 58 59 success &= dict->GetList("Border", &list); 60 int border_x, border_y, border_width, border_height; 61 success &= list->GetInteger(0, &border_x); 62 success &= list->GetInteger(1, &border_y); 63 success &= list->GetInteger(2, &border_width); 64 success &= list->GetInteger(3, &border_height); 65 66 bool fill_center; 67 success &= dict->GetBoolean("FillCenter", &fill_center); 68 69 scoped_refptr<NinePatchLayer> nine_patch_layer = NinePatchLayer::Create(); 70 71 SkBitmap bitmap; 72 bitmap.allocN32Pixels(image_width, image_height); 73 bitmap.setImmutable(); 74 nine_patch_layer->SetBitmap(bitmap); 75 nine_patch_layer->SetAperture( 76 gfx::Rect(aperture_x, aperture_y, aperture_width, aperture_height)); 77 nine_patch_layer->SetBorder( 78 gfx::Rect(border_x, border_y, border_width, border_height)); 79 nine_patch_layer->SetFillCenter(fill_center); 80 81 new_layer = nine_patch_layer; 82 } else if (layer_type == "TextureLayer") { 83 new_layer = TextureLayer::CreateForMailbox(NULL); 84 } else if (layer_type == "PictureLayer") { 85 new_layer = PictureLayer::Create(content_client); 86 } else { // Type "Layer" or "unknown" 87 new_layer = Layer::Create(); 88 } 89 new_layer->SetPosition(gfx::PointF(position_x, position_y)); 90 new_layer->SetBounds(gfx::Size(width, height)); 91 new_layer->SetIsDrawable(draws_content); 92 93 double opacity; 94 if (dict->GetDouble("Opacity", &opacity)) 95 new_layer->SetOpacity(opacity); 96 97 bool contents_opaque; 98 if (dict->GetBoolean("ContentsOpaque", &contents_opaque)) 99 new_layer->SetContentsOpaque(contents_opaque); 100 101 bool scrollable; 102 // TODO(wjmaclean) At some time in the future we may wish to test that a 103 // reconstructed layer tree contains the correct linkage for the scroll 104 // clip layer. This is complicated by the fact that the json output doesn't 105 // (currently) re-construct the tree with the same layer IDs as the original. 106 // But, since a clip layer is always an ancestor of the scrollable layer, we 107 // can just count the number of upwards hops to the clip layer and write that 108 // into the json file (with 0 hops implying no clip layer, i.e. not 109 // scrollable). Reconstructing the tree can then be accomplished by passing 110 // the parent pointer to this function and traversing the same number of 111 // ancestors to determine the pointer to the clip layer. The LayerTreesMatch() 112 // function should then check that both original and reconstructed layers 113 // have the same positioning with respect to their clip layers. 114 // 115 // For now, we can safely indicate a layer is scrollable by giving it a 116 // pointer to itself, something not normally allowed in a working tree. 117 // 118 // https://code.google.com/p/chromium/issues/detail?id=330622 119 // 120 if (dict->GetBoolean("Scrollable", &scrollable)) 121 new_layer->SetScrollClipLayerId(scrollable ? new_layer->id() 122 : Layer::INVALID_ID); 123 124 bool wheel_handler; 125 if (dict->GetBoolean("WheelHandler", &wheel_handler)) 126 new_layer->SetHaveWheelEventHandlers(wheel_handler); 127 128 bool scroll_handler; 129 if (dict->GetBoolean("ScrollHandler", &scroll_handler)) 130 new_layer->SetHaveScrollEventHandlers(scroll_handler); 131 132 bool is_3d_sorted; 133 if (dict->GetBoolean("Is3DSorted", &is_3d_sorted)) { 134 // A non-zero context ID will put the layer into a 3D sorting context 135 new_layer->Set3dSortingContextId(1); 136 } 137 138 if (dict->HasKey("TouchRegion")) { 139 success &= dict->GetList("TouchRegion", &list); 140 Region touch_region; 141 for (size_t i = 0; i < list->GetSize(); ) { 142 int rect_x, rect_y, rect_width, rect_height; 143 success &= list->GetInteger(i++, &rect_x); 144 success &= list->GetInteger(i++, &rect_y); 145 success &= list->GetInteger(i++, &rect_width); 146 success &= list->GetInteger(i++, &rect_height); 147 touch_region.Union(gfx::Rect(rect_x, rect_y, rect_width, rect_height)); 148 } 149 new_layer->SetTouchEventHandlerRegion(touch_region); 150 } 151 152 success &= dict->GetList("DrawTransform", &list); 153 double transform[16]; 154 for (int i = 0; i < 16; ++i) 155 success &= list->GetDouble(i, &transform[i]); 156 157 gfx::Transform layer_transform; 158 layer_transform.matrix().setColMajord(transform); 159 new_layer->SetTransform(layer_transform); 160 161 success &= dict->GetList("Children", &list); 162 for (base::ListValue::const_iterator it = list->begin(); 163 it != list->end(); ++it) { 164 new_layer->AddChild(ParseTreeFromValue(*it, content_client)); 165 } 166 167 if (!success) 168 return NULL; 169 170 return new_layer; 171 } 172 173 } // namespace 174 175 scoped_refptr<Layer> ParseTreeFromJson(std::string json, 176 ContentLayerClient* content_client) { 177 scoped_ptr<base::Value> val = base::test::ParseJson(json); 178 return ParseTreeFromValue(val.get(), content_client); 179 } 180 181 } // namespace cc 182
