cc/layers/nine_patch_layer_impl.cc

   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/nine_patch_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 NinePatchLayerImpl::NinePatchLayerImpl(LayerTreeImpl* tree_impl, int id)
  18     : UIResourceLayerImpl(tree_impl, id),
  19       fill_center_(false) {}
  20
  21 NinePatchLayerImpl::~NinePatchLayerImpl() {}
  22
  23 scoped_ptr<LayerImpl> NinePatchLayerImpl::CreateLayerImpl(
  24     LayerTreeImpl* tree_impl) {
  25   return NinePatchLayerImpl::Create(tree_impl, id());
  26 }
  27
  28 void NinePatchLayerImpl::PushPropertiesTo(LayerImpl* layer) {
  29   UIResourceLayerImpl::PushPropertiesTo(layer);
  30   NinePatchLayerImpl* layer_impl = static_cast<NinePatchLayerImpl*>(layer);
  31
  32   layer_impl->SetLayout(image_aperture_, border_, fill_center_);
  33 }
  34
  35 static gfx::RectF NormalizedRect(float x,
  36                                  float y,
  37                                  float width,
  38                                  float height,
  39                                  float total_width,
  40                                  float total_height) {
  41   return gfx::RectF(x / total_width,
  42                     y / total_height,
  43                     width / total_width,
  44                     height / total_height);
  45 }
  46
  47 void NinePatchLayerImpl::SetLayout(const gfx::Rect& aperture,
  48                                    const gfx::Rect& border,
  49                                    bool fill_center) {
  50   // This check imposes an ordering on the call sequence.  An UIResource must
  51   // exist before SetLayout can be called.
  52   DCHECK(ui_resource_id_);
  53
  54   if (image_aperture_ == aperture &&
  55       border_ == border && fill_center_ == fill_center)
  56     return;
  57
  58   image_aperture_ = aperture;
  59   border_ = border;
  60   fill_center_ = fill_center;
  61
  62   NoteLayerPropertyChanged();
  63 }
  64
  65 void NinePatchLayerImpl::CheckGeometryLimitations() {
  66   // |border| is in layer space.  It cannot exceed the bounds of the layer.
  67   DCHECK_GE(bounds().width(), border_.width());
  68   DCHECK_GE(bounds().height(), border_.height());
  69
  70   // Sanity Check on |border|
  71   DCHECK_LE(border_.x(), border_.width());
  72   DCHECK_LE(border_.y(), border_.height());
  73   DCHECK_GE(border_.x(), 0);
  74   DCHECK_GE(border_.y(), 0);
  75
  76   // |aperture| is in image space.  It cannot exceed the bounds of the bitmap.
  77   DCHECK(!image_aperture_.size().IsEmpty());
  78   DCHECK(gfx::Rect(image_bounds_).Contains(image_aperture_))
  79       << "image_bounds_ " << gfx::Rect(image_bounds_).ToString()
  80       << " image_aperture_ " << image_aperture_.ToString();
  81 }
  82
  83 void NinePatchLayerImpl::AppendQuads(
  84     RenderPass* render_pass,
  85     AppendQuadsData* append_quads_data) {
  86   CheckGeometryLimitations();
  87   SharedQuadState* shared_quad_state =
  88       render_pass->CreateAndAppendSharedQuadState();
  89   PopulateSharedQuadState(shared_quad_state);
  90
  91   AppendDebugBorderQuad(
  92       render_pass, content_bounds(), shared_quad_state, append_quads_data);
  93
  94   if (!ui_resource_id_)
  95     return;
  96
  97   ResourceProvider::ResourceId resource =
  98       layer_tree_impl()->ResourceIdForUIResource(ui_resource_id_);
  99
 100   if (!resource)
 101     return;
 102
 103   static const bool flipped = false;
 104   static const bool nearest_neighbor = false;
 105   static const bool premultiplied_alpha = true;
 106
 107   DCHECK(!bounds().IsEmpty());
 108
 109   // NinePatch border widths in layer space.
 110   int layer_left_width = border_.x();
 111   int layer_top_height = border_.y();
 112   int layer_right_width = border_.width() - layer_left_width;
 113   int layer_bottom_height = border_.height() - layer_top_height;
 114
 115   int layer_middle_width = bounds().width() - border_.width();
 116   int layer_middle_height = bounds().height() - border_.height();
 117
 118   // Patch positions in layer space
 119   gfx::Rect layer_top_left(0, 0, layer_left_width, layer_top_height);
 120   gfx::Rect layer_top_right(bounds().width() - layer_right_width,
 121                             0,
 122                             layer_right_width,
 123                             layer_top_height);
 124   gfx::Rect layer_bottom_left(0,
 125                               bounds().height() - layer_bottom_height,
 126                               layer_left_width,
 127                               layer_bottom_height);
 128   gfx::Rect layer_bottom_right(layer_top_right.x(),
 129                                layer_bottom_left.y(),
 130                                layer_right_width,
 131                                layer_bottom_height);
 132   gfx::Rect layer_top(
 133       layer_top_left.right(), 0, layer_middle_width, layer_top_height);
 134   gfx::Rect layer_left(
 135       0, layer_top_left.bottom(), layer_left_width, layer_middle_height);
 136   gfx::Rect layer_right(layer_top_right.x(),
 137                         layer_top_right.bottom(),
 138                         layer_right_width,
 139                         layer_left.height());
 140   gfx::Rect layer_bottom(layer_top.x(),
 141                          layer_bottom_left.y(),
 142                          layer_top.width(),
 143                          layer_bottom_height);
 144   gfx::Rect layer_center(layer_left_width,
 145                          layer_top_height,
 146                          layer_middle_width,
 147                          layer_middle_height);
 148
 149   // Note the following values are in image (bitmap) space.
 150   float image_width = image_bounds_.width();
 151   float image_height = image_bounds_.height();
 152
 153   int image_aperture_left_width = image_aperture_.x();
 154   int image_aperture_top_height = image_aperture_.y();
 155   int image_aperture_right_width = image_width - image_aperture_.right();
 156   int image_aperture_bottom_height = image_height - image_aperture_.bottom();
 157   // Patch positions in bitmap UV space (from zero to one)
 158   gfx::RectF uv_top_left = NormalizedRect(0,
 159                                           0,
 160                                           image_aperture_left_width,
 161                                           image_aperture_top_height,
 162                                           image_width,
 163                                           image_height);
 164   gfx::RectF uv_top_right =
 165       NormalizedRect(image_width - image_aperture_right_width,
 166                      0,
 167                      image_aperture_right_width,
 168                      image_aperture_top_height,
 169                      image_width,
 170                      image_height);
 171   gfx::RectF uv_bottom_left =
 172       NormalizedRect(0,
 173                      image_height - image_aperture_bottom_height,
 174                      image_aperture_left_width,
 175                      image_aperture_bottom_height,
 176                      image_width,
 177                      image_height);
 178   gfx::RectF uv_bottom_right =
 179       NormalizedRect(image_width - image_aperture_right_width,
 180                      image_height - image_aperture_bottom_height,
 181                      image_aperture_right_width,
 182                      image_aperture_bottom_height,
 183                      image_width,
 184                      image_height);
 185   gfx::RectF uv_top(
 186       uv_top_left.right(),
 187       0,
 188       (image_width - image_aperture_left_width - image_aperture_right_width) /
 189           image_width,
 190       (image_aperture_top_height) / image_height);
 191   gfx::RectF uv_left(0,
 192                      uv_top_left.bottom(),
 193                      image_aperture_left_width / image_width,
 194                      (image_height - image_aperture_top_height -
 195                       image_aperture_bottom_height) /
 196                          image_height);
 197   gfx::RectF uv_right(uv_top_right.x(),
 198                       uv_top_right.bottom(),
 199                       image_aperture_right_width / image_width,
 200                       uv_left.height());
 201   gfx::RectF uv_bottom(uv_top.x(),
 202                        uv_bottom_left.y(),
 203                        uv_top.width(),
 204                        image_aperture_bottom_height / image_height);
 205   gfx::RectF uv_center(uv_top_left.right(),
 206                        uv_top_left.bottom(),
 207                        uv_top.width(),
 208                        uv_left.height());
 209
 210   gfx::Rect opaque_rect;
 211   gfx::Rect visible_rect;
 212   const float vertex_opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
 213   const bool opaque = layer_tree_impl()->IsUIResourceOpaque(ui_resource_id_);
 214
 215   visible_rect =
 216       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
 217           layer_top_left);
 218   opaque_rect = opaque ? visible_rect : gfx::Rect();
 219   if (!visible_rect.IsEmpty()) {
 220     TextureDrawQuad* quad =
 221         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 222     quad->SetNew(shared_quad_state,
 223                  layer_top_left,
 224                  opaque_rect,
 225                  visible_rect,
 226                  resource,
 227                  premultiplied_alpha,
 228                  uv_top_left.origin(),
 229                  uv_top_left.bottom_right(),
 230                  SK_ColorTRANSPARENT,
 231                  vertex_opacity,
 232                  flipped,
 233                  nearest_neighbor);
 234   }
 235
 236   visible_rect =
 237       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
 238           layer_top_right);
 239   opaque_rect = opaque ? visible_rect : gfx::Rect();
 240   if (!visible_rect.IsEmpty()) {
 241     TextureDrawQuad* quad =
 242         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 243     quad->SetNew(shared_quad_state,
 244                  layer_top_right,
 245                  opaque_rect,
 246                  visible_rect,
 247                  resource,
 248                  premultiplied_alpha,
 249                  uv_top_right.origin(),
 250                  uv_top_right.bottom_right(),
 251                  SK_ColorTRANSPARENT,
 252                  vertex_opacity,
 253                  flipped,
 254                  nearest_neighbor);
 255   }
 256
 257   visible_rect =
 258       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
 259           layer_bottom_left);
 260   opaque_rect = opaque ? visible_rect : gfx::Rect();
 261   if (!visible_rect.IsEmpty()) {
 262     TextureDrawQuad* quad =
 263         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 264     quad->SetNew(shared_quad_state,
 265                  layer_bottom_left,
 266                  opaque_rect,
 267                  visible_rect,
 268                  resource,
 269                  premultiplied_alpha,
 270                  uv_bottom_left.origin(),
 271                  uv_bottom_left.bottom_right(),
 272                  SK_ColorTRANSPARENT,
 273                  vertex_opacity,
 274                  flipped,
 275                  nearest_neighbor);
 276   }
 277
 278   visible_rect =
 279       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
 280           layer_bottom_right);
 281   opaque_rect = opaque ? visible_rect : gfx::Rect();
 282   if (!visible_rect.IsEmpty()) {
 283     TextureDrawQuad* quad =
 284         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 285     quad->SetNew(shared_quad_state,
 286                  layer_bottom_right,
 287                  opaque_rect,
 288                  visible_rect,
 289                  resource,
 290                  premultiplied_alpha,
 291                  uv_bottom_right.origin(),
 292                  uv_bottom_right.bottom_right(),
 293                  SK_ColorTRANSPARENT,
 294                  vertex_opacity,
 295                  flipped,
 296                  nearest_neighbor);
 297   }
 298
 299   visible_rect =
 300       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
 301           layer_top);
 302   opaque_rect = opaque ? visible_rect : gfx::Rect();
 303   if (!visible_rect.IsEmpty()) {
 304     TextureDrawQuad* quad =
 305         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 306     quad->SetNew(shared_quad_state,
 307                  layer_top,
 308                  opaque_rect,
 309                  visible_rect,
 310                  resource,
 311                  premultiplied_alpha,
 312                  uv_top.origin(),
 313                  uv_top.bottom_right(),
 314                  SK_ColorTRANSPARENT,
 315                  vertex_opacity,
 316                  flipped,
 317                  nearest_neighbor);
 318   }
 319
 320   visible_rect =
 321       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
 322           layer_left);
 323   opaque_rect = opaque ? visible_rect : gfx::Rect();
 324   if (!visible_rect.IsEmpty()) {
 325     TextureDrawQuad* quad =
 326         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 327     quad->SetNew(shared_quad_state,
 328                  layer_left,
 329                  opaque_rect,
 330                  visible_rect,
 331                  resource,
 332                  premultiplied_alpha,
 333                  uv_left.origin(),
 334                  uv_left.bottom_right(),
 335                  SK_ColorTRANSPARENT,
 336                  vertex_opacity,
 337                  flipped,
 338                  nearest_neighbor);
 339   }
 340
 341   visible_rect =
 342       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
 343           layer_right);
 344   opaque_rect = opaque ? visible_rect : gfx::Rect();
 345   if (!visible_rect.IsEmpty()) {
 346     TextureDrawQuad* quad =
 347         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 348     quad->SetNew(shared_quad_state,
 349                  layer_right,
 350                  opaque_rect,
 351                  layer_right,
 352                  resource,
 353                  premultiplied_alpha,
 354                  uv_right.origin(),
 355                  uv_right.bottom_right(),
 356                  SK_ColorTRANSPARENT,
 357                  vertex_opacity,
 358                  flipped,
 359                  nearest_neighbor);
 360   }
 361
 362   visible_rect =
 363       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
 364           layer_bottom);
 365   opaque_rect = opaque ? visible_rect : gfx::Rect();
 366   if (!visible_rect.IsEmpty()) {
 367     TextureDrawQuad* quad =
 368         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 369     quad->SetNew(shared_quad_state,
 370                  layer_bottom,
 371                  opaque_rect,
 372                  visible_rect,
 373                  resource,
 374                  premultiplied_alpha,
 375                  uv_bottom.origin(),
 376                  uv_bottom.bottom_right(),
 377                  SK_ColorTRANSPARENT,
 378                  vertex_opacity,
 379                  flipped,
 380                  nearest_neighbor);
 381   }
 382
 383   if (fill_center_) {
 384     visible_rect =
 385         draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
 386             layer_center);
 387     opaque_rect = opaque ? visible_rect : gfx::Rect();
 388     if (!visible_rect.IsEmpty()) {
 389       TextureDrawQuad* quad =
 390           render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 391       quad->SetNew(shared_quad_state,
 392                    layer_center,
 393                    opaque_rect,
 394                    visible_rect,
 395                    resource,
 396                    premultiplied_alpha,
 397                    uv_center.origin(),
 398                    uv_center.bottom_right(),
 399                    SK_ColorTRANSPARENT,
 400                    vertex_opacity,
 401                    flipped,
 402                    nearest_neighbor);
 403     }
 404   }
 405 }
 406
 407 const char* NinePatchLayerImpl::LayerTypeAsString() const {
 408   return "cc::NinePatchLayerImpl";
 409 }
 410
 411 base::DictionaryValue* NinePatchLayerImpl::LayerTreeAsJson() const {
 412   base::DictionaryValue* result = LayerImpl::LayerTreeAsJson();
 413
 414   base::ListValue* list = new base::ListValue;
 415   list->AppendInteger(image_aperture_.origin().x());
 416   list->AppendInteger(image_aperture_.origin().y());
 417   list->AppendInteger(image_aperture_.size().width());
 418   list->AppendInteger(image_aperture_.size().height());
 419   result->Set("ImageAperture", list);
 420
 421   list = new base::ListValue;
 422   list->AppendInteger(image_bounds_.width());
 423   list->AppendInteger(image_bounds_.height());
 424   result->Set("ImageBounds", list);
 425
 426   result->Set("Border", MathUtil::AsValue(border_).release());
 427
 428   result->SetBoolean("FillCenter", fill_center_);
 429
 430   return result;
 431 }
 432
 433 }  // namespace cc