cc/layers/tiled_layer_impl.cc

   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 #include "cc/layers/tiled_layer_impl.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/strings/stringprintf.h"
   9 #include "cc/base/math_util.h"
  10 #include "cc/debug/debug_colors.h"
  11 #include "cc/layers/append_quads_data.h"
  12 #include "cc/layers/quad_sink.h"
  13 #include "cc/quads/checkerboard_draw_quad.h"
  14 #include "cc/quads/debug_border_draw_quad.h"
  15 #include "cc/quads/solid_color_draw_quad.h"
  16 #include "cc/quads/tile_draw_quad.h"
  17 #include "cc/resources/layer_tiling_data.h"
  18 #include "third_party/khronos/GLES2/gl2.h"
  19 #include "third_party/skia/include/core/SkColor.h"
  20 #include "ui/gfx/quad_f.h"
  21
  22 namespace cc {
  23
  24 class DrawableTile : public LayerTilingData::Tile {
  25  public:
  26   static scoped_ptr<DrawableTile> Create() {
  27     return make_scoped_ptr(new DrawableTile());
  28   }
  29
  30   ResourceProvider::ResourceId resource_id() const { return resource_id_; }
  31   void set_resource_id(ResourceProvider::ResourceId resource_id) {
  32     resource_id_ = resource_id;
  33   }
  34   bool contents_swizzled() { return contents_swizzled_; }
  35   void set_contents_swizzled(bool contents_swizzled) {
  36     contents_swizzled_ = contents_swizzled;
  37   }
  38
  39  private:
  40   DrawableTile() : resource_id_(0), contents_swizzled_(false) {}
  41
  42   ResourceProvider::ResourceId resource_id_;
  43   bool contents_swizzled_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(DrawableTile);
  46 };
  47
  48 TiledLayerImpl::TiledLayerImpl(LayerTreeImpl* tree_impl, int id)
  49     : LayerImpl(tree_impl, id), skips_draw_(true) {}
  50
  51 TiledLayerImpl::~TiledLayerImpl() {
  52 }
  53
  54 ResourceProvider::ResourceId TiledLayerImpl::ContentsResourceId() const {
  55   // This function is only valid for single texture layers, e.g. masks.
  56   DCHECK(tiler_);
  57   DCHECK_EQ(tiler_->num_tiles_x(), 1);
  58   DCHECK_EQ(tiler_->num_tiles_y(), 1);
  59
  60   DrawableTile* tile = TileAt(0, 0);
  61   ResourceProvider::ResourceId resource_id = tile ? tile->resource_id() : 0;
  62   return resource_id;
  63 }
  64
  65 bool TiledLayerImpl::HasTileAt(int i, int j) const {
  66   return !!tiler_->TileAt(i, j);
  67 }
  68
  69 bool TiledLayerImpl::HasResourceIdForTileAt(int i, int j) const {
  70   return HasTileAt(i, j) && TileAt(i, j)->resource_id();
  71 }
  72
  73 DrawableTile* TiledLayerImpl::TileAt(int i, int j) const {
  74   return static_cast<DrawableTile*>(tiler_->TileAt(i, j));
  75 }
  76
  77 DrawableTile* TiledLayerImpl::CreateTile(int i, int j) {
  78   scoped_ptr<DrawableTile> tile(DrawableTile::Create());
  79   DrawableTile* added_tile = tile.get();
  80   tiler_->AddTile(tile.PassAs<LayerTilingData::Tile>(), i, j);
  81
  82   return added_tile;
  83 }
  84
  85 void TiledLayerImpl::GetDebugBorderProperties(SkColor* color,
  86                                               float* width) const {
  87   *color = DebugColors::TiledContentLayerBorderColor();
  88   *width = DebugColors::TiledContentLayerBorderWidth(layer_tree_impl());
  89 }
  90
  91 scoped_ptr<LayerImpl> TiledLayerImpl::CreateLayerImpl(
  92     LayerTreeImpl* tree_impl) {
  93   return TiledLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
  94 }
  95
  96 void TiledLayerImpl::AsValueInto(base::DictionaryValue* state) const {
  97   LayerImpl::AsValueInto(state);
  98   state->Set("invalidation", MathUtil::AsValue(update_rect()).release());
  99 }
 100
 101 size_t TiledLayerImpl::GPUMemoryUsageInBytes() const {
 102   size_t amount = 0;
 103   const size_t kMemoryUsagePerTileInBytes =
 104       4 * tiler_->tile_size().width() * tiler_->tile_size().height();
 105   for (LayerTilingData::TileMap::const_iterator iter = tiler_->tiles().begin();
 106        iter != tiler_->tiles().end();
 107        ++iter) {
 108     const DrawableTile* tile = static_cast<DrawableTile*>(iter->second);
 109     if (!tile || !tile->resource_id())
 110       continue;
 111     amount += kMemoryUsagePerTileInBytes;
 112   }
 113   return amount;
 114 }
 115
 116 void TiledLayerImpl::PushPropertiesTo(LayerImpl* layer) {
 117   LayerImpl::PushPropertiesTo(layer);
 118
 119   TiledLayerImpl* tiled_layer = static_cast<TiledLayerImpl*>(layer);
 120
 121   tiled_layer->set_skips_draw(skips_draw_);
 122   tiled_layer->SetTilingData(*tiler_);
 123
 124   for (LayerTilingData::TileMap::const_iterator iter = tiler_->tiles().begin();
 125        iter != tiler_->tiles().end();
 126        ++iter) {
 127     int i = iter->first.first;
 128     int j = iter->first.second;
 129     DrawableTile* tile = static_cast<DrawableTile*>(iter->second);
 130
 131     tiled_layer->PushTileProperties(i,
 132                                     j,
 133                                     tile->resource_id(),
 134                                     tile->opaque_rect(),
 135                                     tile->contents_swizzled());
 136   }
 137 }
 138
 139 bool TiledLayerImpl::WillDraw(DrawMode draw_mode,
 140                               ResourceProvider* resource_provider) {
 141   if (!tiler_ || tiler_->has_empty_bounds() ||
 142       visible_content_rect().IsEmpty() ||
 143       draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
 144     return false;
 145   return LayerImpl::WillDraw(draw_mode, resource_provider);
 146 }
 147
 148 void TiledLayerImpl::AppendQuads(QuadSink* quad_sink,
 149                                  AppendQuadsData* append_quads_data) {
 150   DCHECK(tiler_);
 151   DCHECK(!tiler_->has_empty_bounds());
 152   DCHECK(!visible_content_rect().IsEmpty());
 153
 154   gfx::Rect content_rect = visible_content_rect();
 155   SharedQuadState* shared_quad_state =
 156       quad_sink->UseSharedQuadState(CreateSharedQuadState());
 157   AppendDebugBorderQuad(quad_sink, shared_quad_state, append_quads_data);
 158
 159   int left, top, right, bottom;
 160   tiler_->ContentRectToTileIndices(content_rect, &left, &top, &right, &bottom);
 161
 162   if (ShowDebugBorders()) {
 163     for (int j = top; j <= bottom; ++j) {
 164       for (int i = left; i <= right; ++i) {
 165         DrawableTile* tile = TileAt(i, j);
 166         gfx::Rect tile_rect = tiler_->tile_bounds(i, j);
 167         SkColor border_color;
 168         float border_width;
 169
 170         if (skips_draw_ || !tile || !tile->resource_id()) {
 171           border_color = DebugColors::MissingTileBorderColor();
 172           border_width = DebugColors::MissingTileBorderWidth(layer_tree_impl());
 173         } else {
 174           border_color = DebugColors::HighResTileBorderColor();
 175           border_width = DebugColors::HighResTileBorderWidth(layer_tree_impl());
 176         }
 177         scoped_ptr<DebugBorderDrawQuad> debug_border_quad =
 178             DebugBorderDrawQuad::Create();
 179         debug_border_quad->SetNew(
 180             shared_quad_state, tile_rect, border_color, border_width);
 181         quad_sink->Append(debug_border_quad.PassAs<DrawQuad>(),
 182                           append_quads_data);
 183       }
 184     }
 185   }
 186
 187   if (skips_draw_)
 188     return;
 189
 190   for (int j = top; j <= bottom; ++j) {
 191     for (int i = left; i <= right; ++i) {
 192       DrawableTile* tile = TileAt(i, j);
 193       gfx::Rect tile_rect = tiler_->tile_bounds(i, j);
 194       gfx::Rect display_rect = tile_rect;
 195       tile_rect.Intersect(content_rect);
 196
 197       // Skip empty tiles.
 198       if (tile_rect.IsEmpty())
 199         continue;
 200
 201       if (!tile || !tile->resource_id()) {
 202         SkColor checker_color;
 203         if (ShowDebugBorders()) {
 204           checker_color =
 205               tile ? DebugColors::InvalidatedTileCheckerboardColor()
 206                    : DebugColors::EvictedTileCheckerboardColor();
 207         } else {
 208           checker_color = DebugColors::DefaultCheckerboardColor();
 209         }
 210
 211         scoped_ptr<CheckerboardDrawQuad> checkerboard_quad =
 212             CheckerboardDrawQuad::Create();
 213         checkerboard_quad->SetNew(
 214             shared_quad_state, tile_rect, checker_color);
 215         if (quad_sink->Append(checkerboard_quad.PassAs<DrawQuad>(),
 216                               append_quads_data))
 217           append_quads_data->num_missing_tiles++;
 218
 219         continue;
 220       }
 221
 222       gfx::Rect tile_opaque_rect =
 223           contents_opaque() ? tile_rect : gfx::IntersectRects(
 224                                               tile->opaque_rect(), tile_rect);
 225
 226       // Keep track of how the top left has moved, so the texture can be
 227       // offset the same amount.
 228       gfx::Vector2d display_offset = tile_rect.origin() - display_rect.origin();
 229       gfx::Vector2d texture_offset =
 230           tiler_->texture_offset(i, j) + display_offset;
 231       gfx::RectF tex_coord_rect = gfx::RectF(tile_rect.size()) + texture_offset;
 232
 233       float tile_width = static_cast<float>(tiler_->tile_size().width());
 234       float tile_height = static_cast<float>(tiler_->tile_size().height());
 235       gfx::Size texture_size(tile_width, tile_height);
 236
 237       scoped_ptr<TileDrawQuad> quad = TileDrawQuad::Create();
 238       quad->SetNew(shared_quad_state,
 239                    tile_rect,
 240                    tile_opaque_rect,
 241                    tile->resource_id(),
 242                    tex_coord_rect,
 243                    texture_size,
 244                    tile->contents_swizzled());
 245       quad_sink->Append(quad.PassAs<DrawQuad>(), append_quads_data);
 246     }
 247   }
 248 }
 249
 250 void TiledLayerImpl::SetTilingData(const LayerTilingData& tiler) {
 251   if (tiler_) {
 252     tiler_->reset();
 253   } else {
 254     tiler_ = LayerTilingData::Create(tiler.tile_size(),
 255                                      tiler.has_border_texels()
 256                                          ? LayerTilingData::HAS_BORDER_TEXELS
 257                                          : LayerTilingData::NO_BORDER_TEXELS);
 258   }
 259   *tiler_ = tiler;
 260 }
 261
 262 void TiledLayerImpl::PushTileProperties(
 263     int i,
 264     int j,
 265     ResourceProvider::ResourceId resource_id,
 266     gfx::Rect opaque_rect,
 267     bool contents_swizzled) {
 268   DrawableTile* tile = TileAt(i, j);
 269   if (!tile)
 270     tile = CreateTile(i, j);
 271   tile->set_resource_id(resource_id);
 272   tile->set_opaque_rect(opaque_rect);
 273   tile->set_contents_swizzled(contents_swizzled);
 274 }
 275
 276 void TiledLayerImpl::PushInvalidTile(int i, int j) {
 277   DrawableTile* tile = TileAt(i, j);
 278   if (!tile)
 279     tile = CreateTile(i, j);
 280   tile->set_resource_id(0);
 281   tile->set_opaque_rect(gfx::Rect());
 282   tile->set_contents_swizzled(false);
 283 }
 284
 285 Region TiledLayerImpl::VisibleContentOpaqueRegion() const {
 286   if (skips_draw_)
 287     return Region();
 288   if (contents_opaque())
 289     return visible_content_rect();
 290   return tiler_->OpaqueRegionInContentRect(visible_content_rect());
 291 }
 292
 293 void TiledLayerImpl::DidLoseOutputSurface() {
 294   tiler_->reset();
 295 }
 296
 297 const char* TiledLayerImpl::LayerTypeAsString() const {
 298   return "cc::TiledLayerImpl";
 299 }
 300
 301 }  // namespace cc