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| 1 // Copyright 2011 The Chromium Authors. All rights reserved. | 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 | 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 "cc/trees/damage_tracker.h" | 5 #include "cc/trees/damage_tracker.h" |
| 6 | 6 |
| 7 #include <algorithm> | 7 #include <algorithm> |
| 8 | 8 |
| 9 #include "cc/base/math_util.h" | 9 #include "cc/base/math_util.h" |
| 10 #include "cc/layers/heads_up_display_layer_impl.h" | 10 #include "cc/layers/heads_up_display_layer_impl.h" |
| 11 #include "cc/layers/layer_impl.h" | 11 #include "cc/layers/layer_impl.h" |
| 12 #include "cc/layers/render_surface_impl.h" | 12 #include "cc/layers/render_surface_impl.h" |
| 13 #include "cc/output/filter_operations.h" |
| 13 #include "cc/trees/layer_tree_host_common.h" | 14 #include "cc/trees/layer_tree_host_common.h" |
| 14 #include "cc/trees/layer_tree_impl.h" | 15 #include "cc/trees/layer_tree_impl.h" |
| 15 #include "third_party/WebKit/public/platform/WebFilterOperations.h" | |
| 16 | 16 |
| 17 namespace cc { | 17 namespace cc { |
| 18 | 18 |
| 19 scoped_ptr<DamageTracker> DamageTracker::Create() { | 19 scoped_ptr<DamageTracker> DamageTracker::Create() { |
| 20 return make_scoped_ptr(new DamageTracker()); | 20 return make_scoped_ptr(new DamageTracker()); |
| 21 } | 21 } |
| 22 | 22 |
| 23 DamageTracker::DamageTracker() | 23 DamageTracker::DamageTracker() |
| 24 : current_rect_history_(new RectMap), | 24 : current_rect_history_(new RectMap), |
| 25 next_rect_history_(new RectMap) {} | 25 next_rect_history_(new RectMap) {} |
| 26 | 26 |
| 27 DamageTracker::~DamageTracker() {} | 27 DamageTracker::~DamageTracker() {} |
| 28 | 28 |
| 29 static inline void ExpandRectWithFilters( | 29 static inline void ExpandRectWithFilters( |
| 30 gfx::RectF* rect, const WebKit::WebFilterOperations& filters) { | 30 gfx::RectF* rect, const FilterOperations& filters) { |
| 31 int top, right, bottom, left; | 31 int top, right, bottom, left; |
| 32 filters.getOutsets(top, right, bottom, left); | 32 filters.GetOutsets(&top, &right, &bottom, &left); |
| 33 rect->Inset(-left, -top, -right, -bottom); | 33 rect->Inset(-left, -top, -right, -bottom); |
| 34 } | 34 } |
| 35 | 35 |
| 36 static inline void ExpandDamageRectInsideRectWithFilters( | 36 static inline void ExpandDamageRectInsideRectWithFilters( |
| 37 gfx::RectF* damage_rect, | 37 gfx::RectF* damage_rect, |
| 38 const gfx::RectF& pre_filter_rect, | 38 const gfx::RectF& pre_filter_rect, |
| 39 const WebKit::WebFilterOperations& filters) { | 39 const FilterOperations& filters) { |
| 40 gfx::RectF expanded_damage_rect = *damage_rect; | 40 gfx::RectF expanded_damage_rect = *damage_rect; |
| 41 ExpandRectWithFilters(&expanded_damage_rect, filters); | 41 ExpandRectWithFilters(&expanded_damage_rect, filters); |
| 42 gfx::RectF filter_rect = pre_filter_rect; | 42 gfx::RectF filter_rect = pre_filter_rect; |
| 43 ExpandRectWithFilters(&filter_rect, filters); | 43 ExpandRectWithFilters(&filter_rect, filters); |
| 44 | 44 |
| 45 expanded_damage_rect.Intersect(filter_rect); | 45 expanded_damage_rect.Intersect(filter_rect); |
| 46 damage_rect->Union(expanded_damage_rect); | 46 damage_rect->Union(expanded_damage_rect); |
| 47 } | 47 } |
| 48 | 48 |
| 49 void DamageTracker::UpdateDamageTrackingState( | 49 void DamageTracker::UpdateDamageTrackingState( |
| 50 const LayerImplList& layer_list, | 50 const LayerImplList& layer_list, |
| 51 int target_surface_layer_id, | 51 int target_surface_layer_id, |
| 52 bool target_surface_property_changed_only_from_descendant, | 52 bool target_surface_property_changed_only_from_descendant, |
| 53 gfx::Rect target_surface_content_rect, | 53 gfx::Rect target_surface_content_rect, |
| 54 LayerImpl* target_surface_mask_layer, | 54 LayerImpl* target_surface_mask_layer, |
| 55 const WebKit::WebFilterOperations& filters, | 55 const FilterOperations& filters, |
| 56 SkImageFilter* filter) { | 56 SkImageFilter* filter) { |
| 57 // | 57 // |
| 58 // This function computes the "damage rect" of a target surface, and updates | 58 // This function computes the "damage rect" of a target surface, and updates |
| 59 // the state that is used to correctly track damage across frames. The damage | 59 // the state that is used to correctly track damage across frames. The damage |
| 60 // rect is the region of the surface that may have changed and needs to be | 60 // rect is the region of the surface that may have changed and needs to be |
| 61 // redrawn. This can be used to scissor what is actually drawn, to save GPU | 61 // redrawn. This can be used to scissor what is actually drawn, to save GPU |
| 62 // computation and bandwidth. | 62 // computation and bandwidth. |
| 63 // | 63 // |
| 64 // The surface's damage rect is computed as the union of all possible changes | 64 // The surface's damage rect is computed as the union of all possible changes |
| 65 // that have happened to the surface since the last frame was drawn. This | 65 // that have happened to the surface since the last frame was drawn. This |
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| 136 | 136 |
| 137 if (target_surface_property_changed_only_from_descendant) { | 137 if (target_surface_property_changed_only_from_descendant) { |
| 138 damage_rect_for_this_update = target_surface_content_rect; | 138 damage_rect_for_this_update = target_surface_content_rect; |
| 139 } else { | 139 } else { |
| 140 // TODO(shawnsingh): can we clamp this damage to the surface's content rect? | 140 // TODO(shawnsingh): can we clamp this damage to the surface's content rect? |
| 141 // (affects performance, but not correctness) | 141 // (affects performance, but not correctness) |
| 142 damage_rect_for_this_update = damage_from_active_layers; | 142 damage_rect_for_this_update = damage_from_active_layers; |
| 143 damage_rect_for_this_update.Union(damage_from_surface_mask); | 143 damage_rect_for_this_update.Union(damage_from_surface_mask); |
| 144 damage_rect_for_this_update.Union(damage_from_leftover_rects); | 144 damage_rect_for_this_update.Union(damage_from_leftover_rects); |
| 145 | 145 |
| 146 if (filters.hasFilterThatMovesPixels()) { | 146 if (filters.HasFilterThatMovesPixels()) { |
| 147 ExpandRectWithFilters(&damage_rect_for_this_update, filters); | 147 ExpandRectWithFilters(&damage_rect_for_this_update, filters); |
| 148 } else if (filter) { | 148 } else if (filter) { |
| 149 // TODO(senorblanco): Once SkImageFilter reports its outsets, use | 149 // TODO(senorblanco): Once SkImageFilter reports its outsets, use |
| 150 // those here to limit damage. | 150 // those here to limit damage. |
| 151 damage_rect_for_this_update = target_surface_content_rect; | 151 damage_rect_for_this_update = target_surface_content_rect; |
| 152 } | 152 } |
| 153 } | 153 } |
| 154 | 154 |
| 155 // Damage accumulates until we are notified that we actually did draw on that | 155 // Damage accumulates until we are notified that we actually did draw on that |
| 156 // frame. | 156 // frame. |
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| 383 !replica_mask_layer->update_rect().IsEmpty()) | 383 !replica_mask_layer->update_rect().IsEmpty()) |
| 384 target_damage_rect->Union(replica_mask_layer_rect); | 384 target_damage_rect->Union(replica_mask_layer_rect); |
| 385 } | 385 } |
| 386 | 386 |
| 387 // If the layer has a background filter, this may cause pixels in our surface | 387 // If the layer has a background filter, this may cause pixels in our surface |
| 388 // to be expanded, so we will need to expand any damage at or below this | 388 // to be expanded, so we will need to expand any damage at or below this |
| 389 // layer. We expand the damage from this layer too, as we need to readback | 389 // layer. We expand the damage from this layer too, as we need to readback |
| 390 // those pixels from the surface with only the contents of layers below this | 390 // those pixels from the surface with only the contents of layers below this |
| 391 // one in them. This means we need to redraw any pixels in the surface being | 391 // one in them. This means we need to redraw any pixels in the surface being |
| 392 // used for the blur in this layer this frame. | 392 // used for the blur in this layer this frame. |
| 393 if (layer->background_filters().hasFilterThatMovesPixels()) { | 393 if (layer->background_filters().HasFilterThatMovesPixels()) { |
| 394 ExpandDamageRectInsideRectWithFilters(target_damage_rect, | 394 ExpandDamageRectInsideRectWithFilters(target_damage_rect, |
| 395 surface_rect_in_target_space, | 395 surface_rect_in_target_space, |
| 396 layer->background_filters()); | 396 layer->background_filters()); |
| 397 } | 397 } |
| 398 } | 398 } |
| 399 | 399 |
| 400 } // namespace cc | 400 } // namespace cc |
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