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/debug/trace_event_argument.h"
   9 #include "base/strings/stringprintf.h"
  10 #include "cc/base/math_util.h"
  11 #include "cc/base/simple_enclosed_region.h"
  12 #include "cc/debug/debug_colors.h"
  13 #include "cc/layers/append_quads_data.h"
  14 #include "cc/quads/checkerboard_draw_quad.h"
  15 #include "cc/quads/debug_border_draw_quad.h"
  16 #include "cc/quads/solid_color_draw_quad.h"
  17 #include "cc/quads/tile_draw_quad.h"
  18 #include "cc/resources/layer_tiling_data.h"
  19 #include "cc/trees/occlusion.h"
  20 #include "third_party/khronos/GLES2/gl2.h"
  21 #include "third_party/skia/include/core/SkColor.h"
  22 #include "ui/gfx/geometry/quad_f.h"
  23
  24 namespace cc {
  25
  26 class DrawableTile : public LayerTilingData::Tile {
  27  public:
  28   static scoped_ptr<DrawableTile> Create() {
  29     return make_scoped_ptr(new DrawableTile());
  30   }
  31
  32   ResourceProvider::ResourceId resource_id() const { return resource_id_; }
  33   void set_resource_id(ResourceProvider::ResourceId resource_id) {
  34     resource_id_ = resource_id;
  35   }
  36   bool contents_swizzled() { return contents_swizzled_; }
  37   void set_contents_swizzled(bool contents_swizzled) {
  38     contents_swizzled_ = contents_swizzled;
  39   }
  40
  41  private:
  42   DrawableTile() : resource_id_(0), contents_swizzled_(false) {}
  43
  44   ResourceProvider::ResourceId resource_id_;
  45   bool contents_swizzled_;
  46
  47   DISALLOW_COPY_AND_ASSIGN(DrawableTile);
  48 };
  49
  50 TiledLayerImpl::TiledLayerImpl(LayerTreeImpl* tree_impl, int id)
  51     : LayerImpl(tree_impl, id), skips_draw_(true) {}
  52
  53 TiledLayerImpl::~TiledLayerImpl() {
  54 }
  55
  56 void TiledLayerImpl::GetContentsResourceId(
  57     ResourceProvider::ResourceId* resource_id,
  58     gfx::Size* resource_size) const {
  59   // This function is only valid for single texture layers, e.g. masks.
  60   DCHECK(tiler_);
  61   // It's possible the mask layer is created but has no size or otherwise
  62   // can't draw.
  63   if (tiler_->num_tiles_x() == 0 || tiler_->num_tiles_y() == 0) {
  64     *resource_id = 0;
  65     return;
  66   }
  67
  68   // Any other number of tiles other than 0 or 1 is incorrect for masks.
  69   DCHECK_EQ(tiler_->num_tiles_x(), 1);
  70   DCHECK_EQ(tiler_->num_tiles_y(), 1);
  71
  72   DrawableTile* tile = TileAt(0, 0);
  73   *resource_id = tile ? tile->resource_id() : 0;
  74   *resource_size = tiler_->tile_size();
  75 }
  76
  77 bool TiledLayerImpl::HasTileAt(int i, int j) const {
  78   return !!tiler_->TileAt(i, j);
  79 }
  80
  81 bool TiledLayerImpl::HasResourceIdForTileAt(int i, int j) const {
  82   return HasTileAt(i, j) && TileAt(i, j)->resource_id();
  83 }
  84
  85 DrawableTile* TiledLayerImpl::TileAt(int i, int j) const {
  86   return static_cast<DrawableTile*>(tiler_->TileAt(i, j));
  87 }
  88
  89 DrawableTile* TiledLayerImpl::CreateTile(int i, int j) {
  90   scoped_ptr<DrawableTile> tile(DrawableTile::Create());
  91   DrawableTile* added_tile = tile.get();
  92   tiler_->AddTile(tile.Pass(), i, j);
  93
  94   return added_tile;
  95 }
  96
  97 void TiledLayerImpl::GetDebugBorderProperties(SkColor* color,
  98                                               float* width) const {
  99   *color = DebugColors::TiledContentLayerBorderColor();
 100   *width = DebugColors::TiledContentLayerBorderWidth(layer_tree_impl());
 101 }
 102
 103 scoped_ptr<LayerImpl> TiledLayerImpl::CreateLayerImpl(
 104     LayerTreeImpl* tree_impl) {
 105   return TiledLayerImpl::Create(tree_impl, id());
 106 }
 107
 108 void TiledLayerImpl::AsValueInto(base::debug::TracedValue* state) const {
 109   LayerImpl::AsValueInto(state);
 110   state->BeginArray("invalidation");
 111   MathUtil::AddToTracedValue(update_rect(), state);
 112   state->EndArray();
 113 }
 114
 115 size_t TiledLayerImpl::GPUMemoryUsageInBytes() const {
 116   size_t amount = 0;
 117   const size_t kMemoryUsagePerTileInBytes =
 118       4 * tiler_->tile_size().width() * tiler_->tile_size().height();
 119   for (LayerTilingData::TileMap::const_iterator iter = tiler_->tiles().begin();
 120        iter != tiler_->tiles().end();
 121        ++iter) {
 122     const DrawableTile* tile = static_cast<DrawableTile*>(iter->second);
 123     DCHECK(tile);
 124     if (!tile->resource_id())
 125       continue;
 126     amount += kMemoryUsagePerTileInBytes;
 127   }
 128   return amount;
 129 }
 130
 131 void TiledLayerImpl::PushPropertiesTo(LayerImpl* layer) {
 132   LayerImpl::PushPropertiesTo(layer);
 133
 134   TiledLayerImpl* tiled_layer = static_cast<TiledLayerImpl*>(layer);
 135
 136   tiled_layer->set_skips_draw(skips_draw_);
 137   tiled_layer->SetTilingData(*tiler_);
 138
 139   for (LayerTilingData::TileMap::const_iterator iter = tiler_->tiles().begin();
 140        iter != tiler_->tiles().end();
 141        ++iter) {
 142     int i = iter->first.first;
 143     int j = iter->first.second;
 144     DrawableTile* tile = static_cast<DrawableTile*>(iter->second);
 145     DCHECK(tile);
 146     tiled_layer->PushTileProperties(i,
 147                                     j,
 148                                     tile->resource_id(),
 149                                     tile->contents_swizzled());
 150   }
 151 }
 152
 153 bool TiledLayerImpl::WillDraw(DrawMode draw_mode,
 154                               ResourceProvider* resource_provider) {
 155   if (!tiler_ || tiler_->has_empty_bounds() ||
 156       visible_content_rect().IsEmpty() ||
 157       draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
 158     return false;
 159   return LayerImpl::WillDraw(draw_mode, resource_provider);
 160 }
 161
 162 void TiledLayerImpl::AppendQuads(RenderPass* render_pass,
 163                                  const Occlusion& occlusion_in_content_space,
 164                                  AppendQuadsData* append_quads_data) {
 165   DCHECK(tiler_);
 166   DCHECK(!tiler_->has_empty_bounds());
 167   DCHECK(!visible_content_rect().IsEmpty());
 168
 169   gfx::Rect content_rect = visible_content_rect();
 170   SharedQuadState* shared_quad_state =
 171       render_pass->CreateAndAppendSharedQuadState();
 172   PopulateSharedQuadState(shared_quad_state);
 173
 174   AppendDebugBorderQuad(
 175       render_pass, content_bounds(), shared_quad_state, append_quads_data);
 176
 177   int left, top, right, bottom;
 178   tiler_->ContentRectToTileIndices(content_rect, &left, &top, &right, &bottom);
 179
 180   if (ShowDebugBorders()) {
 181     for (int j = top; j <= bottom; ++j) {
 182       for (int i = left; i <= right; ++i) {
 183         DrawableTile* tile = TileAt(i, j);
 184         gfx::Rect tile_rect = tiler_->tile_bounds(i, j);
 185         gfx::Rect visible_tile_rect = tile_rect;
 186         SkColor border_color;
 187         float border_width;
 188
 189         if (skips_draw_ || !tile || !tile->resource_id()) {
 190           border_color = DebugColors::MissingTileBorderColor();
 191           border_width = DebugColors::MissingTileBorderWidth(layer_tree_impl());
 192         } else {
 193           border_color = DebugColors::HighResTileBorderColor();
 194           border_width = DebugColors::HighResTileBorderWidth(layer_tree_impl());
 195         }
 196         DebugBorderDrawQuad* debug_border_quad =
 197             render_pass->CreateAndAppendDrawQuad<DebugBorderDrawQuad>();
 198         debug_border_quad->SetNew(shared_quad_state,
 199                                   tile_rect,
 200                                   visible_tile_rect,
 201                                   border_color,
 202                                   border_width);
 203       }
 204     }
 205   }
 206
 207   if (skips_draw_)
 208     return;
 209
 210   for (int j = top; j <= bottom; ++j) {
 211     for (int i = left; i <= right; ++i) {
 212       DrawableTile* tile = TileAt(i, j);
 213       gfx::Rect tile_rect = tiler_->tile_bounds(i, j);
 214       gfx::Rect display_rect = tile_rect;
 215       tile_rect.Intersect(content_rect);
 216
 217       // Skip empty tiles.
 218       if (tile_rect.IsEmpty())
 219         continue;
 220
 221       gfx::Rect visible_tile_rect =
 222           occlusion_in_content_space.GetUnoccludedContentRect(tile_rect);
 223       if (visible_tile_rect.IsEmpty())
 224         continue;
 225
 226       if (!tile || !tile->resource_id()) {
 227         SkColor checker_color;
 228         if (ShowDebugBorders()) {
 229           checker_color =
 230               tile ? DebugColors::InvalidatedTileCheckerboardColor()
 231                    : DebugColors::EvictedTileCheckerboardColor();
 232         } else {
 233           checker_color = DebugColors::DefaultCheckerboardColor();
 234         }
 235
 236         CheckerboardDrawQuad* checkerboard_quad =
 237             render_pass->CreateAndAppendDrawQuad<CheckerboardDrawQuad>();
 238         checkerboard_quad->SetNew(
 239             shared_quad_state, tile_rect, visible_tile_rect, checker_color);
 240         append_quads_data->num_missing_tiles++;
 241         continue;
 242       }
 243
 244       gfx::Rect tile_opaque_rect = contents_opaque() ? tile_rect : gfx::Rect();
 245
 246       // Keep track of how the top left has moved, so the texture can be
 247       // offset the same amount.
 248       gfx::Vector2d display_offset = tile_rect.origin() - display_rect.origin();
 249       gfx::Vector2d texture_offset =
 250           tiler_->texture_offset(i, j) + display_offset;
 251       gfx::RectF tex_coord_rect = gfx::RectF(tile_rect.size()) + texture_offset;
 252
 253       float tile_width = static_cast<float>(tiler_->tile_size().width());
 254       float tile_height = static_cast<float>(tiler_->tile_size().height());
 255       gfx::Size texture_size(tile_width, tile_height);
 256
 257       TileDrawQuad* quad = render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
 258       quad->SetNew(shared_quad_state,
 259                    tile_rect,
 260                    tile_opaque_rect,
 261                    visible_tile_rect,
 262                    tile->resource_id(),
 263                    tex_coord_rect,
 264                    texture_size,
 265                    tile->contents_swizzled());
 266     }
 267   }
 268 }
 269
 270 void TiledLayerImpl::SetTilingData(const LayerTilingData& tiler) {
 271   if (tiler_) {
 272     tiler_->reset();
 273   } else {
 274     tiler_ = LayerTilingData::Create(tiler.tile_size(),
 275                                      tiler.has_border_texels()
 276                                          ? LayerTilingData::HAS_BORDER_TEXELS
 277                                          : LayerTilingData::NO_BORDER_TEXELS);
 278   }
 279   *tiler_ = tiler;
 280 }
 281
 282 void TiledLayerImpl::PushTileProperties(
 283     int i,
 284     int j,
 285     ResourceProvider::ResourceId resource_id,
 286     bool contents_swizzled) {
 287   DrawableTile* tile = TileAt(i, j);
 288   if (!tile)
 289     tile = CreateTile(i, j);
 290   tile->set_resource_id(resource_id);
 291   tile->set_contents_swizzled(contents_swizzled);
 292 }
 293
 294 void TiledLayerImpl::PushInvalidTile(int i, int j) {
 295   DrawableTile* tile = TileAt(i, j);
 296   if (!tile)
 297     tile = CreateTile(i, j);
 298   tile->set_resource_id(0);
 299   tile->set_contents_swizzled(false);
 300 }
 301
 302 SimpleEnclosedRegion TiledLayerImpl::VisibleContentOpaqueRegion() const {
 303   if (skips_draw_)
 304     return SimpleEnclosedRegion();
 305   return LayerImpl::VisibleContentOpaqueRegion();
 306 }
 307
 308 void TiledLayerImpl::ReleaseResources() {
 309   tiler_->reset();
 310 }
 311
 312 const char* TiledLayerImpl::LayerTypeAsString() const {
 313   return "cc::TiledLayerImpl";
 314 }
 315
 316 }  // namespace cc