cc/resources/tile.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/resources/tile.h"
   6
   7 #include <algorithm>
   8
   9 #include "cc/base/math_util.h"
  10 #include "cc/debug/traced_value.h"
  11 #include "cc/resources/tile_manager.h"
  12 #include "third_party/khronos/GLES2/gl2.h"
  13
  14 namespace cc {
  15
  16 Tile::Id Tile::s_next_id_ = 0;
  17
  18 Tile::Tile(TileManager* tile_manager,
  19            PicturePileImpl* picture_pile,
  20            const gfx::Size& tile_size,
  21            const gfx::Rect& content_rect,
  22            const gfx::Rect& opaque_rect,
  23            float contents_scale,
  24            int layer_id,
  25            int source_frame_number,
  26            int flags)
  27     : RefCountedManaged<Tile>(tile_manager),
  28       tile_manager_(tile_manager),
  29       tile_size_(tile_size),
  30       content_rect_(content_rect),
  31       contents_scale_(contents_scale),
  32       opaque_rect_(opaque_rect),
  33       layer_id_(layer_id),
  34       source_frame_number_(source_frame_number),
  35       flags_(flags),
  36       id_(s_next_id_++) {
  37   set_picture_pile(picture_pile);
  38 }
  39
  40 Tile::~Tile() {
  41   TRACE_EVENT_OBJECT_DELETED_WITH_ID(
  42       TRACE_DISABLED_BY_DEFAULT("cc.debug"),
  43       "cc::Tile", this);
  44 }
  45
  46 void Tile::SetPriority(WhichTree tree, const TilePriority& priority) {
  47   if (priority == priority_[tree])
  48     return;
  49
  50   priority_[tree] = priority;
  51   tile_manager_->DidChangeTilePriority(this);
  52 }
  53
  54 void Tile::MarkRequiredForActivation() {
  55   if (priority_[PENDING_TREE].required_for_activation)
  56     return;
  57
  58   priority_[PENDING_TREE].required_for_activation = true;
  59   tile_manager_->DidChangeTilePriority(this);
  60 }
  61
  62 scoped_ptr<base::Value> Tile::AsValue() const {
  63   scoped_ptr<base::DictionaryValue> res(new base::DictionaryValue());
  64   TracedValue::MakeDictIntoImplicitSnapshotWithCategory(
  65       TRACE_DISABLED_BY_DEFAULT("cc.debug"), res.get(), "cc::Tile", this);
  66   res->Set("picture_pile",
  67            TracedValue::CreateIDRef(picture_pile_.get()).release());
  68   res->SetDouble("contents_scale", contents_scale_);
  69   res->Set("content_rect", MathUtil::AsValue(content_rect_).release());
  70   res->SetInteger("layer_id", layer_id_);
  71   res->Set("active_priority", priority_[ACTIVE_TREE].AsValue().release());
  72   res->Set("pending_priority", priority_[PENDING_TREE].AsValue().release());
  73   res->Set("managed_state", managed_state_.AsValue().release());
  74   res->SetBoolean("can_use_lcd_text", can_use_lcd_text());
  75   res->SetBoolean("use_gpu_rasterization", use_gpu_rasterization());
  76   return res.PassAs<base::Value>();
  77 }
  78
  79 size_t Tile::GPUMemoryUsageInBytes() const {
  80   size_t total_size = 0;
  81   for (int mode = 0; mode < NUM_RASTER_MODES; ++mode)
  82     total_size += managed_state_.tile_versions[mode].GPUMemoryUsageInBytes();
  83   return total_size;
  84 }
  85
  86 RasterMode Tile::DetermineRasterModeForTree(WhichTree tree) const {
  87   return DetermineRasterModeForResolution(priority(tree).resolution);
  88 }
  89
  90 RasterMode Tile::DetermineOverallRasterMode() const {
  91   return DetermineRasterModeForResolution(managed_state_.resolution);
  92 }
  93
  94 RasterMode Tile::DetermineRasterModeForResolution(
  95     TileResolution resolution) const {
  96   RasterMode current_mode = managed_state_.raster_mode;
  97   RasterMode raster_mode = HIGH_QUALITY_RASTER_MODE;
  98   if (resolution == LOW_RESOLUTION)
  99     raster_mode = LOW_QUALITY_RASTER_MODE;
 100   else if (can_use_lcd_text())
 101     raster_mode = HIGH_QUALITY_RASTER_MODE;
 102   else if (managed_state_.tile_versions[current_mode].has_text_ ||
 103            !managed_state_.tile_versions[current_mode].IsReadyToDraw())
 104     raster_mode = HIGH_QUALITY_NO_LCD_RASTER_MODE;
 105
 106   return std::min(raster_mode, current_mode);
 107 }
 108
 109 }  // namespace cc