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      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 "base/debug/trace_event_argument.h"
     10 #include "cc/base/math_util.h"
     11 #include "cc/debug/traced_value.h"
     12 #include "cc/resources/tile_manager.h"
     13 #include "third_party/khronos/GLES2/gl2.h"
     14 
     15 namespace cc {
     16 
     17 Tile::Id Tile::s_next_id_ = 0;
     18 
     19 Tile::Tile(TileManager* tile_manager,
     20            PicturePileImpl* picture_pile,
     21            const gfx::Size& tile_size,
     22            const gfx::Rect& content_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       size_(tile_size),
     30       content_rect_(content_rect),
     31       contents_scale_(contents_scale),
     32       layer_id_(layer_id),
     33       source_frame_number_(source_frame_number),
     34       flags_(flags),
     35       is_shared_(false),
     36       id_(s_next_id_++) {
     37   set_picture_pile(picture_pile);
     38   for (int i = 0; i < NUM_TREES; i++)
     39     is_occluded_[i] = false;
     40 }
     41 
     42 Tile::~Tile() {
     43   TRACE_EVENT_OBJECT_DELETED_WITH_ID(
     44       TRACE_DISABLED_BY_DEFAULT("cc.debug"),
     45       "cc::Tile", this);
     46 }
     47 
     48 void Tile::SetPriority(WhichTree tree, const TilePriority& priority) {
     49   if (priority == priority_[tree])
     50     return;
     51 
     52   priority_[tree] = priority;
     53   tile_manager_->DidChangeTilePriority(this);
     54 }
     55 
     56 void Tile::MarkRequiredForActivation() {
     57   if (priority_[PENDING_TREE].required_for_activation)
     58     return;
     59 
     60   priority_[PENDING_TREE].required_for_activation = true;
     61   tile_manager_->DidChangeTilePriority(this);
     62 }
     63 
     64 void Tile::AsValueInto(base::debug::TracedValue* res) const {
     65   TracedValue::MakeDictIntoImplicitSnapshotWithCategory(
     66       TRACE_DISABLED_BY_DEFAULT("cc.debug"), res, "cc::Tile", this);
     67   TracedValue::SetIDRef(picture_pile_.get(), res, "picture_pile");
     68   res->SetDouble("contents_scale", contents_scale_);
     69 
     70   res->BeginArray("content_rect");
     71   MathUtil::AddToTracedValue(content_rect_, res);
     72   res->EndArray();
     73 
     74   res->SetInteger("layer_id", layer_id_);
     75 
     76   res->BeginDictionary("active_priority");
     77   priority_[ACTIVE_TREE].AsValueInto(res);
     78   res->EndDictionary();
     79 
     80   res->BeginDictionary("pending_priority");
     81   priority_[PENDING_TREE].AsValueInto(res);
     82   res->EndDictionary();
     83 
     84   res->BeginDictionary("managed_state");
     85   managed_state_.AsValueInto(res);
     86   res->EndDictionary();
     87 
     88   res->SetBoolean("use_picture_analysis", use_picture_analysis());
     89 
     90   res->SetInteger("gpu_memory_usage", GPUMemoryUsageInBytes());
     91 }
     92 
     93 size_t Tile::GPUMemoryUsageInBytes() const {
     94   size_t total_size = 0;
     95   for (int mode = 0; mode < NUM_RASTER_MODES; ++mode)
     96     total_size += managed_state_.tile_versions[mode].GPUMemoryUsageInBytes();
     97   return total_size;
     98 }
     99 
    100 RasterMode Tile::DetermineRasterModeForTree(WhichTree tree) const {
    101   return DetermineRasterModeForResolution(priority(tree).resolution);
    102 }
    103 
    104 RasterMode Tile::DetermineOverallRasterMode() const {
    105   return DetermineRasterModeForResolution(managed_state_.resolution);
    106 }
    107 
    108 RasterMode Tile::DetermineRasterModeForResolution(
    109     TileResolution resolution) const {
    110   RasterMode current_mode = managed_state_.raster_mode;
    111   RasterMode raster_mode = resolution == LOW_RESOLUTION
    112                                ? LOW_QUALITY_RASTER_MODE
    113                                : HIGH_QUALITY_RASTER_MODE;
    114   return std::min(raster_mode, current_mode);
    115 }
    116 
    117 bool Tile::HasRasterTask() const {
    118   for (int mode = 0; mode < NUM_RASTER_MODES; ++mode) {
    119     if (managed_state_.tile_versions[mode].raster_task_.get())
    120       return true;
    121   }
    122   return false;
    123 }
    124 
    125 }  // namespace cc
    126