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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include <utility> | |
6 | |
5 #include "cc/resources/tiling_set_eviction_queue.h" | 7 #include "cc/resources/tiling_set_eviction_queue.h" |
6 | 8 |
7 namespace cc { | 9 namespace cc { |
8 | 10 |
11 namespace { | |
12 const size_t kNullTilingIndex = ~static_cast<size_t>(0u); | |
13 } | |
14 | |
9 TilingSetEvictionQueue::TilingSetEvictionQueue() | 15 TilingSetEvictionQueue::TilingSetEvictionQueue() |
10 : tiling_set_(nullptr), | 16 : tiling_set_(nullptr), |
17 tree_(ACTIVE_TREE), | |
11 tree_priority_(SAME_PRIORITY_FOR_BOTH_TREES), | 18 tree_priority_(SAME_PRIORITY_FOR_BOTH_TREES), |
12 current_category_(PictureLayerTiling::EVENTUALLY), | 19 skip_all_shared_tiles_(false), |
20 skip_shared_out_of_order_tiles_(false), | |
21 processing_required_for_activation_tiling_(false), | |
22 processing_soon_border_rect_(false), | |
23 current_priority_bin_(TilePriority::EVENTUALLY), | |
13 current_tiling_index_(0u), | 24 current_tiling_index_(0u), |
25 current_required_for_activation_tiling_index_(kNullTilingIndex), | |
14 current_tiling_range_type_(PictureLayerTilingSet::HIGHER_THAN_HIGH_RES), | 26 current_tiling_range_type_(PictureLayerTilingSet::HIGHER_THAN_HIGH_RES), |
15 current_eviction_tile_(nullptr), | 27 current_eviction_tile_(nullptr), |
16 eviction_tiles_(nullptr), | 28 next_unoccluded_now_tile_index_(0u) { |
17 next_eviction_tile_index_(0u) { | |
18 } | 29 } |
19 | 30 |
20 TilingSetEvictionQueue::TilingSetEvictionQueue( | 31 TilingSetEvictionQueue::TilingSetEvictionQueue( |
21 PictureLayerTilingSet* tiling_set, | 32 PictureLayerTilingSet* tiling_set, |
22 TreePriority tree_priority) | 33 TreePriority tree_priority, |
34 bool skip_shared_out_of_order_tiles) | |
23 : tiling_set_(tiling_set), | 35 : tiling_set_(tiling_set), |
36 tree_(ACTIVE_TREE), | |
24 tree_priority_(tree_priority), | 37 tree_priority_(tree_priority), |
25 current_category_(PictureLayerTiling::EVENTUALLY), | 38 skip_all_shared_tiles_(false), |
39 skip_shared_out_of_order_tiles_(skip_shared_out_of_order_tiles), | |
40 processing_required_for_activation_tiling_(false), | |
41 processing_soon_border_rect_(false), | |
42 current_priority_bin_(TilePriority::EVENTUALLY), | |
26 current_tiling_index_(0u), | 43 current_tiling_index_(0u), |
44 current_required_for_activation_tiling_index_(kNullTilingIndex), | |
27 current_tiling_range_type_(PictureLayerTilingSet::HIGHER_THAN_HIGH_RES), | 45 current_tiling_range_type_(PictureLayerTilingSet::HIGHER_THAN_HIGH_RES), |
28 current_eviction_tile_(nullptr), | 46 current_eviction_tile_(nullptr), |
29 eviction_tiles_(nullptr), | 47 next_unoccluded_now_tile_index_(0u) { |
30 next_eviction_tile_index_(0u) { | |
31 DCHECK(tiling_set_); | 48 DCHECK(tiling_set_); |
32 | 49 |
33 // Early out if the layer has no tilings. | 50 // Early out if the layer has no tilings. |
34 if (!tiling_set_->num_tilings()) | 51 if (!tiling_set_->num_tilings()) |
35 return; | 52 return; |
36 | 53 |
54 const PictureLayerTilingClient* client = tiling_set_->tiling_at(0)->client_; | |
vmpstr
2014/12/09 19:47:56
tiling_set has a client as well (and it's the same
USE eero AT chromium.org
2014/12/10 12:35:46
Done.
| |
55 tree_ = client->GetTree(); | |
56 skip_all_shared_tiles_ = | |
57 skip_shared_out_of_order_tiles_ && | |
58 tree_priority_ == (tree_ == ACTIVE_TREE ? NEW_CONTENT_TAKES_PRIORITY | |
59 : SMOOTHNESS_TAKES_PRIORITY); | |
60 | |
37 current_tiling_index_ = CurrentTilingRange().start - 1u; | 61 current_tiling_index_ = CurrentTilingRange().start - 1u; |
38 AdvanceToNextValidTiling(); | 62 AdvanceToNextValidTiling(); |
39 } | 63 } |
40 | 64 |
41 TilingSetEvictionQueue::~TilingSetEvictionQueue() { | 65 TilingSetEvictionQueue::~TilingSetEvictionQueue() { |
42 } | 66 } |
43 | 67 |
44 bool TilingSetEvictionQueue::IsEmpty() const { | 68 bool TilingSetEvictionQueue::IsEmpty() const { |
45 return !current_eviction_tile_; | 69 return !current_eviction_tile_; |
46 } | 70 } |
47 | 71 |
48 void TilingSetEvictionQueue::Pop() { | 72 void TilingSetEvictionQueue::Pop() { |
49 DCHECK(!IsEmpty()); | 73 DCHECK(!IsEmpty()); |
50 | 74 |
51 if (!AdvanceToNextEvictionTile()) | 75 if (!AdvanceToNextEvictionTile()) |
52 AdvanceToNextValidTiling(); | 76 AdvanceToNextValidTiling(); |
53 } | 77 } |
54 | 78 |
55 Tile* TilingSetEvictionQueue::Top() { | 79 Tile* TilingSetEvictionQueue::Top() { |
56 DCHECK(!IsEmpty()); | 80 DCHECK(!IsEmpty()); |
57 return current_eviction_tile_; | 81 return current_eviction_tile_; |
58 } | 82 } |
59 | 83 |
60 const Tile* TilingSetEvictionQueue::Top() const { | 84 const Tile* TilingSetEvictionQueue::Top() const { |
61 DCHECK(!IsEmpty()); | 85 DCHECK(!IsEmpty()); |
62 return current_eviction_tile_; | 86 return current_eviction_tile_; |
63 } | 87 } |
64 | 88 |
65 bool TilingSetEvictionQueue::AdvanceToNextCategory() { | 89 bool TilingSetEvictionQueue::AdvanceToNextEvictionTile() { |
66 // Advance to the next category. This is done only after all tiling range | 90 // Advance to the next eviction tile within the current priority bin and |
67 // types within the previous category have been gone through. | 91 // tiling. This is done while advancing to a new tiling and while popping |
92 // the current tile. | |
93 | |
94 bool required_for_activation = processing_required_for_activation_tiling_; | |
95 | |
96 for (;;) { | |
97 while (spiral_iterator_) { | |
98 std::pair<int, int> next_index = spiral_iterator_.index(); | |
99 Tile* tile = current_tiling_->TileAt(next_index.first, next_index.second); | |
100 ++spiral_iterator_; | |
101 if (!tile || !tile->HasResources()) | |
102 continue; | |
103 if (skip_all_shared_tiles_ && tile->is_shared()) | |
104 continue; | |
105 current_tiling_->UpdateTileAndTwinPriority(tile); | |
106 if (skip_shared_out_of_order_tiles_ && IsSharedOutOfOrderTile(tile)) | |
107 continue; | |
108 if (tile->required_for_activation() == required_for_activation) { | |
109 current_eviction_tile_ = tile; | |
110 return true; | |
111 } | |
112 SetCurrentRequiredForActivationTilingIndex(current_tiling_index_); | |
vmpstr
2014/12/09 19:47:56
This is the part that is confusing to me. I think
USE eero AT chromium.org
2014/12/10 12:35:46
Done.
| |
113 } | |
114 if (processing_soon_border_rect_) { | |
115 // Advance from soon border rect to skewport rect. | |
116 processing_soon_border_rect_ = false; | |
117 if (current_tiling_->has_skewport_rect_tiles_) { | |
118 spiral_iterator_ = TilingData::ReverseSpiralDifferenceIterator( | |
119 ¤t_tiling_->tiling_data_, | |
120 current_tiling_->current_skewport_rect_, | |
121 current_tiling_->current_visible_rect_, | |
122 current_tiling_->current_visible_rect_); | |
123 continue; | |
124 } | |
125 } | |
126 break; | |
127 } | |
128 | |
129 if (visible_iterator_) { | |
130 TilePriority::PriorityBin max_tile_priority_bin = | |
131 current_tiling_->client_->GetMaxTilePriorityBin(); | |
132 do { | |
133 std::pair<int, int> next_index = visible_iterator_.index(); | |
134 Tile* tile = current_tiling_->TileAt(next_index.first, next_index.second); | |
135 ++visible_iterator_; | |
136 if (!tile || !tile->HasResources()) | |
137 continue; | |
138 if (skip_all_shared_tiles_ && tile->is_shared()) | |
139 continue; | |
140 if (max_tile_priority_bin <= TilePriority::NOW) { | |
141 if (tree_ == PENDING_TREE && | |
142 current_tiling_->IsTileRequiredForActivationIfVisible(tile) != | |
143 required_for_activation) { | |
144 SetCurrentRequiredForActivationTilingIndex(current_tiling_index_); | |
145 continue; | |
146 } | |
147 if (!current_tiling_->IsTileOccluded(tile)) { | |
148 unoccluded_now_tiles_.push_back(tile); | |
149 continue; | |
150 } | |
151 } | |
152 current_tiling_->UpdateTileAndTwinPriority(tile); | |
153 if (skip_shared_out_of_order_tiles_ && IsSharedOutOfOrderTile(tile)) | |
154 continue; | |
155 if (tile->required_for_activation() == required_for_activation) { | |
156 current_eviction_tile_ = tile; | |
157 return true; | |
158 } | |
159 SetCurrentRequiredForActivationTilingIndex(current_tiling_index_); | |
160 } while (visible_iterator_); | |
161 } | |
162 | |
163 if (!unoccluded_now_tiles_.empty()) { | |
164 while (next_unoccluded_now_tile_index_ < unoccluded_now_tiles_.size()) { | |
165 Tile* tile = unoccluded_now_tiles_[next_unoccluded_now_tile_index_]; | |
166 ++next_unoccluded_now_tile_index_; | |
167 DCHECK(tile); | |
168 if (!tile->HasResources()) | |
169 continue; | |
170 current_tiling_->UpdateTileAndTwinPriority(tile); | |
171 if (skip_shared_out_of_order_tiles_ && IsSharedOutOfOrderTile(tile)) | |
172 continue; | |
173 if (tile->required_for_activation() == required_for_activation) { | |
174 current_eviction_tile_ = tile; | |
175 return true; | |
176 } | |
177 SetCurrentRequiredForActivationTilingIndex(current_tiling_index_); | |
178 } | |
179 unoccluded_now_tiles_.clear(); | |
180 next_unoccluded_now_tile_index_ = 0u; | |
181 } | |
182 | |
183 current_eviction_tile_ = nullptr; | |
184 return false; | |
185 } | |
186 | |
187 bool TilingSetEvictionQueue::AdvanceToNextPriorityBin() { | |
188 // Advance to the next priority bin. This is done only after all tiling range | |
189 // types (including the required for activation tiling) within the previous | |
190 // priority bin have been gone through. | |
68 DCHECK_EQ(current_tiling_range_type_, PictureLayerTilingSet::HIGH_RES); | 191 DCHECK_EQ(current_tiling_range_type_, PictureLayerTilingSet::HIGH_RES); |
192 DCHECK_EQ(current_required_for_activation_tiling_index_, kNullTilingIndex); | |
69 | 193 |
70 switch (current_category_) { | 194 switch (current_priority_bin_) { |
71 case PictureLayerTiling::EVENTUALLY: | 195 case TilePriority::EVENTUALLY: |
72 current_category_ = | 196 current_priority_bin_ = TilePriority::SOON; |
73 PictureLayerTiling::EVENTUALLY_AND_REQUIRED_FOR_ACTIVATION; | |
74 return true; | 197 return true; |
75 case PictureLayerTiling::EVENTUALLY_AND_REQUIRED_FOR_ACTIVATION: | 198 case TilePriority::SOON: |
76 current_category_ = PictureLayerTiling::SOON; | 199 current_priority_bin_ = TilePriority::NOW; |
77 return true; | 200 return true; |
78 case PictureLayerTiling::SOON: | 201 case TilePriority::NOW: |
79 current_category_ = PictureLayerTiling::SOON_AND_REQUIRED_FOR_ACTIVATION; | |
80 return true; | |
81 case PictureLayerTiling::SOON_AND_REQUIRED_FOR_ACTIVATION: | |
82 current_category_ = PictureLayerTiling::NOW; | |
83 return true; | |
84 case PictureLayerTiling::NOW: | |
85 current_category_ = PictureLayerTiling::NOW_AND_REQUIRED_FOR_ACTIVATION; | |
86 return true; | |
87 case PictureLayerTiling::NOW_AND_REQUIRED_FOR_ACTIVATION: | |
88 return false; | 202 return false; |
89 } | 203 } |
90 NOTREACHED(); | 204 NOTREACHED(); |
91 return false; | 205 return false; |
92 } | 206 } |
93 | 207 |
94 bool TilingSetEvictionQueue::AdvanceToNextEvictionTile() { | |
95 // Advance to the next eviction tile within the current category and tiling. | |
96 // This is done while advancing to a new tiling (in which case the next | |
97 // eviction tile index is 0) and while popping the current tile (in which | |
98 // case the next eviction tile index is greater than 0). | |
99 DCHECK_EQ(next_eviction_tile_index_ > 0, current_eviction_tile_ != nullptr); | |
100 | |
101 while (next_eviction_tile_index_ < eviction_tiles_->size()) { | |
102 Tile* tile = (*eviction_tiles_)[next_eviction_tile_index_]; | |
103 ++next_eviction_tile_index_; | |
104 if (tile->HasResources()) { | |
105 current_eviction_tile_ = tile; | |
106 return true; | |
107 } | |
108 } | |
109 | |
110 current_eviction_tile_ = nullptr; | |
111 return false; | |
112 } | |
113 | |
114 bool TilingSetEvictionQueue::AdvanceToNextTilingRangeType() { | 208 bool TilingSetEvictionQueue::AdvanceToNextTilingRangeType() { |
115 // Advance to the next tiling range type within the current category or to | 209 // Advance to the next tiling range type within the current priority bin, to |
116 // the first tiling range type within the next category. This is done only | 210 // the required for activation tiling range type within the current priority |
117 // after all tilings within the previous tiling range type have been gone | 211 // bin or to the first tiling range type within the next priority bin. This |
118 // through. | 212 // is done only after all tilings within the previous tiling range type have |
213 // been gone through. | |
119 DCHECK_EQ(current_tiling_index_, CurrentTilingRange().end); | 214 DCHECK_EQ(current_tiling_index_, CurrentTilingRange().end); |
120 | 215 |
121 switch (current_tiling_range_type_) { | 216 switch (current_tiling_range_type_) { |
122 case PictureLayerTilingSet::HIGHER_THAN_HIGH_RES: | 217 case PictureLayerTilingSet::HIGHER_THAN_HIGH_RES: |
123 current_tiling_range_type_ = PictureLayerTilingSet::LOWER_THAN_LOW_RES; | 218 current_tiling_range_type_ = PictureLayerTilingSet::LOWER_THAN_LOW_RES; |
124 return true; | 219 return true; |
125 case PictureLayerTilingSet::LOWER_THAN_LOW_RES: | 220 case PictureLayerTilingSet::LOWER_THAN_LOW_RES: |
126 current_tiling_range_type_ = | 221 current_tiling_range_type_ = |
127 PictureLayerTilingSet::BETWEEN_HIGH_AND_LOW_RES; | 222 PictureLayerTilingSet::BETWEEN_HIGH_AND_LOW_RES; |
128 return true; | 223 return true; |
129 case PictureLayerTilingSet::BETWEEN_HIGH_AND_LOW_RES: | 224 case PictureLayerTilingSet::BETWEEN_HIGH_AND_LOW_RES: |
130 current_tiling_range_type_ = PictureLayerTilingSet::LOW_RES; | 225 current_tiling_range_type_ = PictureLayerTilingSet::LOW_RES; |
131 return true; | 226 return true; |
132 case PictureLayerTilingSet::LOW_RES: | 227 case PictureLayerTilingSet::LOW_RES: |
133 current_tiling_range_type_ = PictureLayerTilingSet::HIGH_RES; | 228 current_tiling_range_type_ = PictureLayerTilingSet::HIGH_RES; |
134 return true; | 229 return true; |
135 case PictureLayerTilingSet::HIGH_RES: | 230 case PictureLayerTilingSet::HIGH_RES: |
136 if (!AdvanceToNextCategory()) | 231 if (!processing_required_for_activation_tiling_ && |
232 current_required_for_activation_tiling_index_ != kNullTilingIndex) { | |
233 processing_required_for_activation_tiling_ = true; | |
234 return true; | |
235 } | |
236 SetCurrentRequiredForActivationTilingIndex(kNullTilingIndex); | |
237 processing_required_for_activation_tiling_ = false; | |
238 | |
239 if (!AdvanceToNextPriorityBin()) | |
137 return false; | 240 return false; |
138 | 241 |
139 current_tiling_range_type_ = PictureLayerTilingSet::HIGHER_THAN_HIGH_RES; | 242 current_tiling_range_type_ = PictureLayerTilingSet::HIGHER_THAN_HIGH_RES; |
140 return true; | 243 return true; |
141 } | 244 } |
142 NOTREACHED(); | 245 NOTREACHED(); |
143 return false; | 246 return false; |
144 } | 247 } |
145 | 248 |
146 bool TilingSetEvictionQueue::AdvanceToNextValidTiling() { | 249 bool TilingSetEvictionQueue::AdvanceToNextValidTiling() { |
147 // Advance to the next tiling within current tiling range type or to | 250 // Advance to the next tiling within current tiling range type or to |
148 // the first tiling within the next tiling range type or category until | 251 // the first tiling within the next tiling range type or priority bin until |
149 // the next eviction tile is found. This is done only after all eviction | 252 // the next eviction tile is found. This is done only after all eviction |
150 // tiles within the previous tiling within the current category and tiling | 253 // tiles within the previous tiling within the current priority bin and |
151 // range type have been gone through. | 254 // tiling range type have been gone through. |
152 DCHECK(!current_eviction_tile_); | 255 DCHECK(!current_eviction_tile_); |
153 DCHECK_NE(current_tiling_index_, CurrentTilingRange().end); | 256 DCHECK_NE(current_tiling_index_, CurrentTilingRange().end); |
154 | 257 |
155 for (;;) { | 258 for (;;) { |
156 ++current_tiling_index_; | 259 ++current_tiling_index_; |
157 while (current_tiling_index_ == CurrentTilingRange().end) { | 260 while (current_tiling_index_ == CurrentTilingRange().end) { |
158 if (!AdvanceToNextTilingRangeType()) | 261 if (!AdvanceToNextTilingRangeType()) |
159 return false; | 262 return false; |
160 current_tiling_index_ = CurrentTilingRange().start; | 263 current_tiling_index_ = CurrentTilingRange().start; |
161 } | 264 } |
265 current_tiling_ = tiling_set_->tiling_at(CurrentTilingIndex()); | |
162 | 266 |
163 PictureLayerTiling* tiling = tiling_set_->tiling_at(CurrentTilingIndex()); | 267 switch (current_priority_bin_) { |
164 eviction_tiles_ = | 268 case TilePriority::EVENTUALLY: |
165 tiling->GetEvictionTiles(tree_priority_, current_category_); | 269 if (current_tiling_->has_eventually_rect_tiles_) { |
166 next_eviction_tile_index_ = 0u; | 270 spiral_iterator_ = TilingData::ReverseSpiralDifferenceIterator( |
167 if (AdvanceToNextEvictionTile()) | 271 ¤t_tiling_->tiling_data_, |
168 return true; | 272 current_tiling_->current_eventually_rect_, |
273 current_tiling_->current_skewport_rect_, | |
274 current_tiling_->current_soon_border_rect_); | |
275 if (AdvanceToNextEvictionTile()) | |
276 return true; | |
277 } | |
278 break; | |
279 case TilePriority::SOON: | |
280 if (current_tiling_->has_skewport_rect_tiles_ || | |
281 current_tiling_->has_soon_border_rect_tiles_) { | |
282 processing_soon_border_rect_ = true; | |
283 if (current_tiling_->has_soon_border_rect_tiles_) | |
284 spiral_iterator_ = TilingData::ReverseSpiralDifferenceIterator( | |
285 ¤t_tiling_->tiling_data_, | |
286 current_tiling_->current_soon_border_rect_, | |
287 current_tiling_->current_skewport_rect_, | |
288 current_tiling_->current_visible_rect_); | |
289 if (AdvanceToNextEvictionTile()) | |
290 return true; | |
291 } | |
292 break; | |
293 case TilePriority::NOW: | |
294 if (current_tiling_->has_visible_rect_tiles_) { | |
295 visible_iterator_ = | |
296 TilingData::Iterator(¤t_tiling_->tiling_data_, | |
297 current_tiling_->current_visible_rect_, | |
298 false /* include_borders */); | |
299 if (AdvanceToNextEvictionTile()) | |
300 return true; | |
301 } | |
302 break; | |
303 } | |
169 } | 304 } |
170 } | 305 } |
171 | 306 |
172 PictureLayerTilingSet::TilingRange | 307 PictureLayerTilingSet::TilingRange |
173 TilingSetEvictionQueue::CurrentTilingRange() const { | 308 TilingSetEvictionQueue::CurrentTilingRange() const { |
309 if (processing_required_for_activation_tiling_) | |
310 return PictureLayerTilingSet::TilingRange( | |
311 current_required_for_activation_tiling_index_, | |
312 current_required_for_activation_tiling_index_ + 1); | |
174 return tiling_set_->GetTilingRange(current_tiling_range_type_); | 313 return tiling_set_->GetTilingRange(current_tiling_range_type_); |
175 } | 314 } |
176 | 315 |
177 size_t TilingSetEvictionQueue::CurrentTilingIndex() const { | 316 size_t TilingSetEvictionQueue::CurrentTilingIndex() const { |
178 DCHECK_NE(current_tiling_index_, CurrentTilingRange().end); | 317 DCHECK_NE(current_tiling_index_, CurrentTilingRange().end); |
179 switch (current_tiling_range_type_) { | 318 switch (current_tiling_range_type_) { |
180 case PictureLayerTilingSet::HIGHER_THAN_HIGH_RES: | 319 case PictureLayerTilingSet::HIGHER_THAN_HIGH_RES: |
181 case PictureLayerTilingSet::LOW_RES: | 320 case PictureLayerTilingSet::LOW_RES: |
182 case PictureLayerTilingSet::HIGH_RES: | 321 case PictureLayerTilingSet::HIGH_RES: |
183 return current_tiling_index_; | 322 return current_tiling_index_; |
184 // Tilings in the following ranges are accessed in reverse order. | 323 // Tilings in the following ranges are accessed in reverse order. |
185 case PictureLayerTilingSet::BETWEEN_HIGH_AND_LOW_RES: | 324 case PictureLayerTilingSet::BETWEEN_HIGH_AND_LOW_RES: |
186 case PictureLayerTilingSet::LOWER_THAN_LOW_RES: { | 325 case PictureLayerTilingSet::LOWER_THAN_LOW_RES: { |
187 PictureLayerTilingSet::TilingRange tiling_range = CurrentTilingRange(); | 326 PictureLayerTilingSet::TilingRange tiling_range = CurrentTilingRange(); |
188 size_t current_tiling_range_offset = | 327 size_t current_tiling_range_offset = |
189 current_tiling_index_ - tiling_range.start; | 328 current_tiling_index_ - tiling_range.start; |
190 return tiling_range.end - 1 - current_tiling_range_offset; | 329 return tiling_range.end - 1 - current_tiling_range_offset; |
191 } | 330 } |
192 } | 331 } |
193 NOTREACHED(); | 332 NOTREACHED(); |
194 return 0; | 333 return 0; |
195 } | 334 } |
196 | 335 |
336 bool TilingSetEvictionQueue::IsSharedOutOfOrderTile(const Tile* tile) const { | |
337 if (!tile->is_shared()) | |
338 return false; | |
339 | |
340 switch (tree_priority_) { | |
341 case SMOOTHNESS_TAKES_PRIORITY: | |
342 DCHECK_EQ(ACTIVE_TREE, tree_); | |
343 return false; | |
344 case NEW_CONTENT_TAKES_PRIORITY: | |
345 DCHECK_EQ(PENDING_TREE, tree_); | |
346 return false; | |
347 case SAME_PRIORITY_FOR_BOTH_TREES: | |
348 break; | |
349 default: | |
vmpstr
2014/12/09 19:47:56
Don't put a default case (if a new case is added,
USE eero AT chromium.org
2014/12/10 12:35:46
Done. Had to add case for NUM_TREE_PRIORITIES, tho
vmpstr
2014/12/10 18:01:15
Ok, that's fine. We can remove NUM_TREE_PRIORITIES
| |
350 NOTREACHED(); | |
351 } | |
352 | |
353 // The priority for tile priority of a shared tile will be a combined | |
354 // priority thus return shared tiles from a higher priority tree. | |
355 WhichTree other_tree = tree_ == ACTIVE_TREE ? PENDING_TREE : ACTIVE_TREE; | |
356 const TilePriority& priority = tile->priority(tree_); | |
357 const TilePriority& other_priority = tile->priority(other_tree); | |
vmpstr
2014/12/09 19:47:56
nit: twin_tree/twin_priority
USE eero AT chromium.org
2014/12/10 12:35:46
Done.
| |
358 if (priority.priority_bin != other_priority.priority_bin) | |
359 return priority.priority_bin < other_priority.priority_bin; | |
360 const bool occluded = tile->is_occluded(tree_); | |
361 const bool other_occluded = tile->is_occluded(other_tree); | |
362 if (occluded != other_occluded) | |
363 return !occluded; | |
364 if (priority.distance_to_visible != other_priority.distance_to_visible) | |
365 return priority.distance_to_visible < other_priority.distance_to_visible; | |
366 | |
367 // If priorities are the same, it does not matter which tree returns | |
368 // the tile. Let's pick the pending tree. | |
369 return tree_ == PENDING_TREE; | |
197 } | 370 } |
371 | |
372 void TilingSetEvictionQueue::SetCurrentRequiredForActivationTilingIndex( | |
373 size_t index) { | |
374 // A tiling can have required for activation tiles only if the tiling is | |
375 // pending high-res tiling or its twin tiling. There can thus be at most one | |
376 // such tiling in a tiling set. | |
377 DCHECK(current_required_for_activation_tiling_index_ == index || | |
378 current_required_for_activation_tiling_index_ == kNullTilingIndex || | |
379 index == kNullTilingIndex); | |
380 current_required_for_activation_tiling_index_ = index; | |
381 } | |
382 | |
383 } // namespace cc | |
OLD | NEW |