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| 1 // Copyright 2016 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 "ui/accelerated_widget_mac/ca_layer_partial_damage_tree_mac.h" | |
| 6 | |
| 7 #include "base/command_line.h" | |
| 8 #include "base/mac/scoped_nsobject.h" | |
| 9 #include "base/mac/sdk_forward_declarations.h" | |
| 10 #include "base/trace_event/trace_event.h" | |
| 11 #include "ui/base/ui_base_switches.h" | |
| 12 #include "ui/gfx/transform.h" | |
| 13 | |
| 14 @interface CALayer(Private) | |
| 15 -(void)setContentsChanged; | |
| 16 @end | |
| 17 | |
| 18 namespace ui { | |
| 19 namespace { | |
| 20 | |
| 21 // When selecting a CALayer to re-use for partial damage, this is the maximum | |
| 22 // fraction of the merged layer's pixels that may be not-updated by the swap | |
| 23 // before we consider the CALayer to not be a good enough match, and create a | |
| 24 // new one. | |
| 25 const float kMaximumPartialDamageWasteFraction = 1.2f; | |
| 26 | |
| 27 // The maximum number of partial damage layers that may be created before we | |
| 28 // give up and remove them all (doing full damage in the process). | |
| 29 const size_t kMaximumPartialDamageLayers = 8; | |
| 30 | |
| 31 } // namespace | |
| 32 | |
| 33 class CALayerPartialDamageTree::OverlayPlane { | |
| 34 public: | |
| 35 OverlayPlane(base::ScopedCFTypeRef<IOSurfaceRef> io_surface, | |
| 36 const gfx::Rect& pixel_frame_rect, | |
| 37 const gfx::RectF& contents_rect) | |
| 38 : io_surface(io_surface), | |
| 39 contents_rect(contents_rect), | |
| 40 pixel_frame_rect(pixel_frame_rect), | |
| 41 layer_needs_update(true) {} | |
| 42 | |
| 43 ~OverlayPlane() { | |
| 44 [ca_layer setContents:nil]; | |
| 45 [ca_layer removeFromSuperlayer]; | |
| 46 ca_layer.reset(); | |
| 47 } | |
| 48 | |
| 49 const base::ScopedCFTypeRef<IOSurfaceRef> io_surface; | |
| 50 const gfx::RectF contents_rect; | |
| 51 const gfx::Rect pixel_frame_rect; | |
| 52 bool layer_needs_update; | |
| 53 base::scoped_nsobject<CALayer> ca_layer; | |
| 54 | |
| 55 void TakeCALayerFrom(OverlayPlane* other_plane) { | |
| 56 ca_layer.swap(other_plane->ca_layer); | |
| 57 } | |
| 58 | |
| 59 void UpdateProperties(float scale_factor) { | |
| 60 if (layer_needs_update) { | |
| 61 [ca_layer setOpaque:YES]; | |
| 62 | |
| 63 id new_contents = static_cast<id>(io_surface.get()); | |
| 64 if ([ca_layer contents] == new_contents) | |
| 65 [ca_layer setContentsChanged]; | |
| 66 else | |
| 67 [ca_layer setContents:new_contents]; | |
| 68 [ca_layer setContentsRect:contents_rect.ToCGRect()]; | |
| 69 | |
| 70 [ca_layer setAnchorPoint:CGPointZero]; | |
| 71 | |
| 72 if ([ca_layer respondsToSelector:(@selector(setContentsScale:))]) | |
| 73 [ca_layer setContentsScale:scale_factor]; | |
| 74 gfx::RectF dip_frame_rect = gfx::RectF(pixel_frame_rect); | |
| 75 dip_frame_rect.Scale(1 / scale_factor); | |
| 76 [ca_layer setBounds:CGRectMake(0, 0, dip_frame_rect.width(), | |
| 77 dip_frame_rect.height())]; | |
| 78 [ca_layer | |
| 79 setPosition:CGPointMake(dip_frame_rect.x(), dip_frame_rect.y())]; | |
| 80 } | |
| 81 static bool show_borders = | |
| 82 base::CommandLine::ForCurrentProcess()->HasSwitch( | |
| 83 switches::kShowMacOverlayBorders); | |
| 84 if (show_borders) { | |
| 85 base::ScopedCFTypeRef<CGColorRef> color; | |
| 86 if (!layer_needs_update) { | |
| 87 // Green represents contents that are unchanged across frames. | |
| 88 color.reset(CGColorCreateGenericRGB(0, 1, 0, 1)); | |
| 89 } else { | |
| 90 // Red represents damaged contents. | |
| 91 color.reset(CGColorCreateGenericRGB(1, 0, 0, 1)); | |
| 92 } | |
| 93 [ca_layer setBorderWidth:1]; | |
| 94 [ca_layer setBorderColor:color]; | |
| 95 } | |
| 96 layer_needs_update = false; | |
| 97 } | |
| 98 | |
| 99 private: | |
| 100 }; | |
| 101 | |
| 102 void CALayerPartialDamageTree::UpdatePartialDamagePlanes( | |
| 103 CALayerPartialDamageTree* old_tree, | |
| 104 const gfx::Rect& pixel_damage_rect) { | |
| 105 // Don't create partial damage layers if partial swap is disabled. | |
| 106 if (!allow_partial_swap_) | |
| 107 return; | |
| 108 // Only create partial damage layers when building on top of an existing tree. | |
| 109 if (!old_tree) | |
| 110 return; | |
| 111 // If the frame size has changed, discard all of the old partial damage | |
| 112 // layers. | |
| 113 if (old_tree->root_plane_->pixel_frame_rect != root_plane_->pixel_frame_rect) | |
| 114 return; | |
| 115 // If there is full damage, discard all of the old partial damage layers. | |
| 116 if (pixel_damage_rect == root_plane_->pixel_frame_rect) | |
| 117 return; | |
| 118 | |
| 119 // If there is no damage, don't change anything. | |
| 120 if (pixel_damage_rect.IsEmpty()) { | |
| 121 std::swap(partial_damage_planes_, old_tree->partial_damage_planes_); | |
| 122 return; | |
| 123 } | |
| 124 | |
| 125 // Find the last partial damage plane to re-use the CALayer from. Grow the | |
| 126 // new rect for this layer to include this damage, and all nearby partial | |
| 127 // damage layers. | |
| 128 std::unique_ptr<OverlayPlane> plane_for_swap; | |
| 129 { | |
| 130 auto plane_to_reuse_iter = old_tree->partial_damage_planes_.end(); | |
| 131 gfx::Rect plane_to_reuse_enlarged_pixel_damage_rect; | |
| 132 | |
| 133 for (auto old_plane_iter = old_tree->partial_damage_planes_.begin(); | |
| 134 old_plane_iter != old_tree->partial_damage_planes_.end(); | |
| 135 ++old_plane_iter) { | |
| 136 gfx::Rect enlarged_pixel_damage_rect = | |
| 137 (*old_plane_iter)->pixel_frame_rect; | |
| 138 enlarged_pixel_damage_rect.Union(pixel_damage_rect); | |
| 139 | |
| 140 // Compute the fraction of the pixels that would not be updated by this | |
| 141 // swap. If it is too big, try another layer. | |
| 142 float waste_fraction = enlarged_pixel_damage_rect.size().GetArea() * 1.f / | |
| 143 pixel_damage_rect.size().GetArea(); | |
| 144 if (waste_fraction > kMaximumPartialDamageWasteFraction) | |
| 145 continue; | |
| 146 | |
| 147 plane_to_reuse_iter = old_plane_iter; | |
| 148 plane_to_reuse_enlarged_pixel_damage_rect.Union( | |
| 149 enlarged_pixel_damage_rect); | |
| 150 } | |
| 151 if (plane_to_reuse_iter != old_tree->partial_damage_planes_.end()) { | |
| 152 gfx::RectF enlarged_contents_rect = | |
| 153 gfx::RectF(plane_to_reuse_enlarged_pixel_damage_rect); | |
| 154 enlarged_contents_rect.Scale(1. / root_plane_->pixel_frame_rect.width(), | |
| 155 1. / root_plane_->pixel_frame_rect.height()); | |
| 156 | |
| 157 plane_for_swap.reset(new OverlayPlane( | |
| 158 root_plane_->io_surface, plane_to_reuse_enlarged_pixel_damage_rect, | |
| 159 enlarged_contents_rect)); | |
| 160 | |
| 161 plane_for_swap->TakeCALayerFrom((*plane_to_reuse_iter).get()); | |
| 162 if (*plane_to_reuse_iter != old_tree->partial_damage_planes_.back()) { | |
| 163 CALayer* superlayer = [plane_for_swap->ca_layer superlayer]; | |
| 164 [plane_for_swap->ca_layer removeFromSuperlayer]; | |
| 165 [superlayer addSublayer:plane_for_swap->ca_layer]; | |
| 166 } | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 // If we haven't found an appropriate layer to re-use, create a new one, if | |
| 171 // we haven't already created too many. | |
| 172 if (!plane_for_swap.get() && | |
| 173 old_tree->partial_damage_planes_.size() < kMaximumPartialDamageLayers) { | |
| 174 gfx::RectF contents_rect = gfx::RectF(pixel_damage_rect); | |
| 175 contents_rect.Scale(1. / root_plane_->pixel_frame_rect.width(), | |
| 176 1. / root_plane_->pixel_frame_rect.height()); | |
| 177 plane_for_swap.reset(new OverlayPlane(root_plane_->io_surface, | |
| 178 pixel_damage_rect, contents_rect)); | |
| 179 } | |
| 180 | |
| 181 // And if we still don't have a layer, do full damage. | |
| 182 if (!plane_for_swap.get()) | |
| 183 return; | |
| 184 | |
| 185 // Walk all old partial damage planes. Remove anything that is now completely | |
| 186 // covered, and move everything else into the new |partial_damage_planes_|. | |
| 187 for (auto& old_plane : old_tree->partial_damage_planes_) { | |
| 188 if (!old_plane.get()) | |
| 189 continue; | |
| 190 // Intersect the planes' frames with the new root plane to ensure that | |
| 191 // they don't get kept alive inappropriately. | |
| 192 gfx::Rect old_plane_frame_rect = old_plane->pixel_frame_rect; | |
| 193 old_plane_frame_rect.Intersect(root_plane_->pixel_frame_rect); | |
| 194 | |
| 195 bool old_plane_covered_by_swap = false; | |
| 196 if (plane_for_swap.get() && | |
| 197 plane_for_swap->pixel_frame_rect.Contains(old_plane_frame_rect)) { | |
| 198 old_plane_covered_by_swap = true; | |
| 199 } | |
| 200 if (!old_plane_covered_by_swap) { | |
| 201 DCHECK(old_plane->ca_layer); | |
| 202 partial_damage_planes_.push_back(std::move(old_plane)); | |
| 203 } | |
| 204 } | |
| 205 | |
| 206 partial_damage_planes_.push_back(std::move(plane_for_swap)); | |
| 207 } | |
| 208 | |
| 209 void CALayerPartialDamageTree::UpdateRootAndPartialDamagePlanes( | |
| 210 std::unique_ptr<CALayerPartialDamageTree> old_tree, | |
| 211 const gfx::Rect& pixel_damage_rect) { | |
| 212 // First update the partial damage tree. | |
| 213 UpdatePartialDamagePlanes(old_tree.get(), pixel_damage_rect); | |
| 214 if (old_tree) { | |
| 215 if (partial_damage_planes_.empty()) { | |
| 216 // If there are no partial damage planes, then we will be updating the | |
| 217 // root layer. Take the CALayer from the old tree. | |
| 218 root_plane_->TakeCALayerFrom(old_tree->root_plane_.get()); | |
| 219 } else { | |
| 220 // If there is a partial damage tree, then just take the old plane | |
| 221 // from the previous frame, so that there is no update to it. | |
| 222 root_plane_.swap(old_tree->root_plane_); | |
| 223 } | |
| 224 } | |
| 225 } | |
| 226 | |
| 227 void CALayerPartialDamageTree::UpdateCALayers(CALayer* superlayer, | |
| 228 float scale_factor) { | |
| 229 if (!allow_partial_swap_) { | |
| 230 DCHECK(partial_damage_planes_.empty()); | |
| 231 return; | |
| 232 } | |
| 233 | |
| 234 // Allocate and update CALayers for the backbuffer and partial damage layers. | |
| 235 if (!root_plane_->ca_layer) { | |
| 236 DCHECK(partial_damage_planes_.empty()); | |
| 237 root_plane_->ca_layer.reset([[CALayer alloc] init]); | |
| 238 [superlayer setSublayers:nil]; | |
| 239 [superlayer addSublayer:root_plane_->ca_layer]; | |
| 240 } | |
| 241 // Excessive logging to debug white screens (crbug.com/583805). | |
| 242 // TODO(ccameron): change this back to a DLOG. | |
| 243 if ([root_plane_->ca_layer superlayer] != superlayer) { | |
| 244 LOG(ERROR) << "CALayerPartialDamageTree root layer not attached to tree."; | |
| 245 } | |
| 246 for (auto& plane : partial_damage_planes_) { | |
| 247 if (!plane->ca_layer) { | |
| 248 DCHECK(plane == partial_damage_planes_.back()); | |
| 249 plane->ca_layer.reset([[CALayer alloc] init]); | |
| 250 } | |
| 251 if (![plane->ca_layer superlayer]) { | |
| 252 DCHECK(plane == partial_damage_planes_.back()); | |
| 253 [superlayer addSublayer:plane->ca_layer]; | |
| 254 } | |
| 255 } | |
| 256 root_plane_->UpdateProperties(scale_factor); | |
| 257 for (auto& plane : partial_damage_planes_) | |
| 258 plane->UpdateProperties(scale_factor); | |
| 259 } | |
| 260 | |
| 261 CALayerPartialDamageTree::CALayerPartialDamageTree( | |
| 262 bool allow_partial_swap, | |
| 263 base::ScopedCFTypeRef<IOSurfaceRef> io_surface, | |
| 264 const gfx::Rect& pixel_frame_rect) | |
| 265 : allow_partial_swap_(allow_partial_swap) { | |
| 266 root_plane_.reset( | |
| 267 new OverlayPlane(io_surface, pixel_frame_rect, gfx::RectF(0, 0, 1, 1))); | |
| 268 } | |
| 269 | |
| 270 CALayerPartialDamageTree::~CALayerPartialDamageTree() {} | |
| 271 | |
| 272 base::ScopedCFTypeRef<IOSurfaceRef> | |
| 273 CALayerPartialDamageTree::RootLayerIOSurface() { | |
| 274 return root_plane_->io_surface; | |
| 275 } | |
| 276 | |
| 277 void CALayerPartialDamageTree::CommitCALayers( | |
| 278 CALayer* superlayer, | |
| 279 std::unique_ptr<CALayerPartialDamageTree> old_tree, | |
| 280 float scale_factor, | |
| 281 const gfx::Rect& pixel_damage_rect) { | |
| 282 TRACE_EVENT0("gpu", "CALayerPartialDamageTree::CommitCALayers"); | |
| 283 UpdateRootAndPartialDamagePlanes(std::move(old_tree), pixel_damage_rect); | |
| 284 UpdateCALayers(superlayer, scale_factor); | |
| 285 } | |
| 286 | |
| 287 } // namespace ui | |
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Chromium Code Reviews
Issue 1917723002:
Move logic from ImageTransportSurfaceOverlayMac into ui/ (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master