1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580
|
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GL_DC_LAYER_TREE_H_
#define UI_GL_DC_LAYER_TREE_H_
#include <windows.h>
#include <d3d11.h>
#include <dcomp.h>
#include <wrl/client.h>
#include <memory>
#include "base/check_is_test.h"
#include "base/containers/flat_map.h"
#include "base/moving_window.h"
#include "base/types/expected.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/overlay_layer_id.h"
#include "ui/gl/dc_layer_overlay_params.h"
#include "ui/gl/delegated_ink_point_renderer_gpu.h"
#include "ui/gl/gl_export.h"
#include "ui/gl/hdr_metadata_helper_win.h"
namespace gfx {
namespace mojom {
class DelegatedInkPointRenderer;
} // namespace mojom
class DelegatedInkMetadata;
} // namespace gfx
namespace gl {
struct CommitError {
// The source of the commit error. This should correspond with exactly one
// place in code to make identifying the cause of errors easier.
enum class Reason {
kUnknown,
kIDCompositionDeviceCommit,
kPresentToSwapChain,
kSolidColorSurfacePoolCreateSurface,
kSolidColorSurfaceBeginDraw,
kSolidColorSurfaceEndDraw,
kSolidColorSurfaceCreateRenderTargetView,
};
Reason reason = Reason::kUnknown;
// If set, the error was caused by a Windows API and this is the HRESULT. If
// not set, the error was not caused by a Windows API or we did not explicitly
// copy out the failing HRESULT for the given `reason`.
std::optional<HRESULT> hr;
};
class SwapChainPresenter;
// Cache video processor and its size.
struct VideoProcessorWrapper {
VideoProcessorWrapper();
~VideoProcessorWrapper();
VideoProcessorWrapper(VideoProcessorWrapper&& other) = delete;
VideoProcessorWrapper& operator=(VideoProcessorWrapper&& other) = delete;
VideoProcessorWrapper(const VideoProcessorWrapper&) = delete;
VideoProcessorWrapper& operator=(VideoProcessorWrapper& other) = delete;
class SizeSmoother {
public:
SizeSmoother();
~SizeSmoother();
SizeSmoother(SizeSmoother&& other) = delete;
SizeSmoother& operator=(SizeSmoother&& other) = delete;
SizeSmoother(const SizeSmoother& other) = delete;
SizeSmoother& operator=(SizeSmoother& other) = delete;
void PutSize(gfx::Size size);
gfx::Size GetSize() const;
private:
base::MovingMax<int> width_;
base::MovingMax<int> height_;
};
// Input and output size of video processor.
gfx::Size video_input_size;
gfx::Size video_output_size;
// Max window filter for each dimension for input and output size.
// Used to calculate required size in case there are many different
// sizes in use.
SizeSmoother input_size_smoother;
SizeSmoother output_size_smoother;
bool GetDriverSupportsVpAutoHdr() { return driver_supports_vp_auto_hdr; }
void SetDriverSupportsVpAutoHdr(bool value) {
driver_supports_vp_auto_hdr = value;
}
// The video processor is cached so SwapChains don't have to recreate it
// whenever they're created.
Microsoft::WRL::ComPtr<ID3D11VideoDevice> video_device;
Microsoft::WRL::ComPtr<ID3D11VideoContext> video_context;
Microsoft::WRL::ComPtr<ID3D11VideoProcessor> video_processor;
Microsoft::WRL::ComPtr<ID3D11VideoProcessorEnumerator>
video_processor_enumerator;
private:
// Whether the GPU driver supports video processor auto HDR.
bool driver_supports_vp_auto_hdr = false;
};
class SolidColorSurface;
// A resource pool that contains DComp surfaces containing solid color fills.
class SolidColorSurfacePool final {
public:
SolidColorSurfacePool(
Microsoft::WRL::ComPtr<ID3D11Device> d3d11_device,
Microsoft::WRL::ComPtr<IDCompositionDevice3> dcomp_device);
~SolidColorSurfacePool();
SolidColorSurfacePool(const SolidColorSurfacePool&) = delete;
SolidColorSurfacePool& operator=(const SolidColorSurfacePool&) = delete;
// The resulting surface only contains the opaque parts of |color| and needs
// to be scaled by |color.fA|. Its contents are only valid until the next
// |TrimAfterCommit| call, since surfaces can be reused (and recolored) on
// subsequent frames.
base::expected<IDCompositionSurface*, CommitError> GetSolidColorSurface(
const SkColor4f& color);
// Clean up any unused resources in the pool after DComp commit.
void TrimAfterCommit();
// Returns the number of surfaces currently tracked by this pool.
size_t GetNumSurfacesInPoolForTesting() const;
private:
Microsoft::WRL::ComPtr<ID3D11Device> d3d11_device_;
Microsoft::WRL::ComPtr<IDCompositionDevice3> dcomp_device_;
// Solid color surfaces that are tracked by this pool.
std::vector<SolidColorSurface> tracked_surfaces_;
// Index into |tracked_surfaces_| that partitions the surfaces used this frame
// (<num_used_this_frame_) and the surfaces free to use by subsequent
// |GetSolidColorSurface| calls (>=num_used_this_frame_).
size_t num_used_this_frame_ = 0;
struct Stats {
// The number of times |GetSolidColorSurface| was called. This represents
// the number of solid color overlays in the frame.
int num_surfaces_requested = 0;
// The number of surfaces that were filled.
int num_surfaces_recolored = 0;
};
// Stats about this pool since the last |TrimAfterCommit| call.
Stats stats_since_last_trim_;
};
// DCLayerTree manages a tree of direct composition visuals, and associated
// swap chains for given overlay layers.
class GL_EXPORT DCLayerTree {
public:
using DelegatedInkRenderer = DelegatedInkPointRendererGpu;
DCLayerTree(bool disable_nv12_dynamic_textures,
bool disable_vp_auto_hdr,
bool disable_vp_scaling,
bool disable_vp_super_resolution,
bool disable_dc_letterbox_video_optimization,
bool force_dcomp_triple_buffer_video_swap_chain,
bool no_downscaled_overlay_promotion);
DCLayerTree(const DCLayerTree&) = delete;
DCLayerTree& operator=(const DCLayerTree&) = delete;
~DCLayerTree();
void Initialize(HWND window,
Microsoft::WRL::ComPtr<ID3D11Device> d3d11_device);
// Present overlay layers, and perform a direct composition commit if
// necessary. Returns true if presentation and commit succeeded.
base::expected<void, CommitError> CommitAndClearPendingOverlays(
std::vector<DCLayerOverlayParams> overlays);
// Called by SwapChainPresenter to initialize video processor that can handle
// at least given input and output size. The video processor is shared across
// layers so the same one can be reused if it's large enough. Returns true on
// success.
VideoProcessorWrapper* InitializeVideoProcessor(
const gfx::Size& input_size,
const gfx::Size& output_size,
bool is_hdr_output,
bool& video_processor_recreated);
bool disable_nv12_dynamic_textures() const {
return disable_nv12_dynamic_textures_;
}
bool disable_vp_auto_hdr() const { return disable_vp_auto_hdr_; }
bool disable_vp_scaling() const { return disable_vp_scaling_; }
bool disable_vp_super_resolution() const {
return disable_vp_super_resolution_;
}
bool disable_dc_letterbox_video_optimization() const {
return disable_dc_letterbox_video_optimization_;
}
bool force_dcomp_triple_buffer_video_swap_chain() const {
return force_dcomp_triple_buffer_video_swap_chain_;
}
bool no_downscaled_overlay_promotion() const {
return no_downscaled_overlay_promotion_;
}
IDXGISwapChain1* GetLayerSwapChainForTesting(
const gfx::OverlayLayerId& layer_id) const;
void GetSwapChainVisualInfoForTesting(const gfx::OverlayLayerId& layer_id,
gfx::Transform* out_transform,
gfx::Point* out_offset,
gfx::Rect* out_clip_rect) const;
size_t GetSwapChainPresenterCountForTesting() const;
size_t GetDcompLayerCountForTesting() const;
IDCompositionVisual2* GetContentVisualForTesting(
const gfx::OverlayLayerId& layer_id) const;
IDCompositionSurface* GetBackgroundColorSurfaceForTesting(
const gfx::OverlayLayerId& layer_id) const;
size_t GetNumSurfacesInPoolForTesting() const;
#if DCHECK_IS_ON()
bool DcompVisualContentChangedFromPreviousFrameForTesting(
const gfx::OverlayLayerId& layer_id) const;
#endif // DCHECK_IS_ON()
const std::unique_ptr<HDRMetadataHelperWin>& GetHDRMetadataHelper() {
return hdr_metadata_helper_;
}
HWND window() const { return window_; }
bool SupportsDelegatedInk();
void SetDelegatedInkTrailStartPoint(
std::unique_ptr<gfx::DelegatedInkMetadata>);
void InitDelegatedInkPointRendererReceiver(
mojo::PendingReceiver<gfx::mojom::DelegatedInkPointRenderer>
pending_receiver);
DelegatedInkRenderer* GetInkRendererForTesting() const {
CHECK_IS_TEST();
return ink_renderer_.get();
}
// Owns a list of |VisualSubtree|s that represent visual layers.
class VisualTree {
public:
VisualTree(DCLayerTree* tree);
VisualTree(VisualTree&&) = delete;
VisualTree(const VisualTree&) = delete;
VisualTree& operator=(const VisualTree&) = delete;
~VisualTree();
// Given overlays, builds or updates this visual tree.
// Returns true if commit succeeded.
base::expected<void, CommitError> BuildTree(
const std::vector<DCLayerOverlayParams>& overlays);
void GetSwapChainVisualInfoForTesting(const gfx::OverlayLayerId& layer_id,
gfx::Transform* out_transform,
gfx::Point* out_offset,
gfx::Rect* out_clip_rect) const;
size_t GetDcompLayerCountForTesting() const;
IDCompositionVisual2* GetContentVisualForTesting(
const gfx::OverlayLayerId& layer_id) const;
IDCompositionSurface* GetBackgroundColorSurfaceForTesting(
const gfx::OverlayLayerId& layer_id) const;
#if DCHECK_IS_ON()
bool DcompVisualContentChangedFromPreviousFrameForTesting(
const gfx::OverlayLayerId& layer_id) const;
#endif // DCHECK_IS_ON()
// Maps the visual content to its corresponding subtree index.
// This is used to find matching subtrees from the previous frame
// that can be reused in the current frame.
// It's safe to use raw pointers here since we have a ComPtr to the visual
// content in the visual subtrees list for the previous frame.
using VisualSubtreeMap = base::flat_map<raw_ptr<IUnknown>, size_t>;
// Owns a subtree of DComp visual that apply clip, offset, etc. and contains
// some content at its leaf.
// This class keeps track about what properties are currently set on the
// visuals.
class VisualSubtree {
public:
VisualSubtree();
~VisualSubtree();
VisualSubtree(VisualSubtree&& other) = delete;
VisualSubtree& operator=(VisualSubtree&& other) = delete;
VisualSubtree(const VisualSubtree&) = delete;
VisualSubtree& operator=(VisualSubtree& other) = delete;
// Returns true if something was changed.
bool Update(
IDCompositionDevice3* dcomp_device,
Microsoft::WRL::ComPtr<IUnknown> dcomp_visual_content,
uint64_t dcomp_surface_serial,
const gfx::Size& image_size,
const gfx::RectF& content_rect,
Microsoft::WRL::ComPtr<IDCompositionSurface> background_color_surface,
const SkColor4f& background_color,
const gfx::Rect& quad_rect,
bool nearest_neighbor_filter,
const gfx::Transform& quad_to_root_transform,
const gfx::RRectF& rounded_corner_bounds,
float opacity,
const std::optional<gfx::Rect>& clip_rect_in_root,
bool allow_antialiasing);
IDCompositionVisual2* container_visual() const {
return clip_visual_.Get();
}
IDCompositionVisual2* content_visual() const {
return content_visual_.Get();
}
IUnknown* dcomp_visual_content() const {
return dcomp_visual_content_.Get();
}
IDCompositionSurface* background_color_surface_for_testing() const {
CHECK_IS_TEST();
return background_color_surface_.Get();
}
void GetSwapChainVisualInfoForTesting(gfx::Transform* out_transform,
gfx::Point* out_offset,
gfx::Rect* out_clip_rect) const;
#if DCHECK_IS_ON()
bool DcompVisualContentChangedFromPreviousFrameForTesting() const {
CHECK_IS_TEST();
return dcomp_visual_content_changed_from_previous_frame_;
}
#endif // DCHECK_IS_ON()
int z_order() const { return z_order_; }
void set_z_order(int z_order) { z_order_ = z_order; }
gfx::Transform GetQuadToRootTransformForTesting() const {
return quad_to_root_transform_;
}
std::optional<gfx::Rect> GetClipRectInRootForTesting() const {
return clip_rect_in_root_;
}
private:
#if DCHECK_IS_ON()
friend class VisualTree;
#endif // DCHECK_IS_ON()
// The root of this subtree. In root space and contains the clip rect and
// controls subtree opacity.
Microsoft::WRL::ComPtr<IDCompositionVisual2> clip_visual_;
// In root space and contains the rounded rectangle clip. This is separate
// from |clip_visual_| since an overlay layer can have both a rectangular
// and a rounded rectangular clip rects.
Microsoft::WRL::ComPtr<IDCompositionVisual2> rounded_corners_visual_;
// The child of |clip_visual_|, transforms its children from quad to root
// space. This visual exists because |offset_| is in quad space, so it
// must be affected by |transform_|. They cannot be on the same visual
// since |IDCompositionVisual::SetTransform| and
// |IDCompositionVisual::SetOffset[XY]| are applied in the opposite order
// than we want.
Microsoft::WRL::ComPtr<IDCompositionVisual2> transform_visual_;
// A child of |transform_visual_|. In quad space, holds
// |dcomp_visual_content_|. Visually, this is behind |content_visual_|.
Microsoft::WRL::ComPtr<IDCompositionVisual2> background_color_visual_;
// A child of |transform_visual_|. In quad space, holds
// |dcomp_visual_content_|.
Microsoft::WRL::ComPtr<IDCompositionVisual2> content_visual_;
// The content to be placed at a leaf of the visual subtree. Either an
// IDCompositionSurface or an IDXGISwapChain.
Microsoft::WRL::ComPtr<IUnknown> dcomp_visual_content_;
// |dcomp_surface_serial_| is associated with |dcomp_visual_content_| of
// IDCompositionSurface type. New value indicates that dcomp surface data
// is updated.
uint64_t dcomp_surface_serial_ = 0;
// The portion of |dcomp_visual_content_| to display. This area will be
// mapped to |quad_rect_|'s bounds.
gfx::RectF content_rect_;
// The surface for the background color fill to be placed at a leaf of the
// visual subtree. Since |SolidColorSurfacePool::GetSolidColorSurface|
// returns a surface that is opaque, |background_color_visual_|'s opacity
// will be set to |background_color_.fA|. Must be present if
// |background_color_| is non-transparent. Must be re-updated from
// |SolidColorSurfacePool::GetSolidColorSurface| every frame it is
// present.
Microsoft::WRL::ComPtr<IDCompositionSurface> background_color_surface_;
// The color of |background_color_surface_|.
SkColor4f background_color_;
// The bounds which contain this overlay. When mapped by |transform_|,
// this is the bounds of the overlay in root space.
gfx::Rect quad_rect_;
// Whether or not to use nearest-neighbor filtering to scale
// |dcomp_visual_content_|. This is applied to |transform_visual_| since
// both it and |content_visual_| can scale the content.
bool nearest_neighbor_filter_ = false;
// Transform from quad space to root space.
gfx::Transform quad_to_root_transform_;
// Clip rect in root space.
std::optional<gfx::Rect> clip_rect_in_root_;
// Rounded corner clip in root space
gfx::RRectF rounded_corner_bounds_;
// The opacity of the entire visual subtree
float opacity_ = 1.0;
// The size of overlay image in |dcomp_visual_content_| which is in
// pixels.
gfx::Size image_size_;
// If false, force |transform_visual_| to use the hard border mode.
bool allow_antialiasing_ = true;
// The order relative to the root surface. Positive values means the
// visual appears in front of the root surface (i.e. overlay) and negative
// values means the visual appears below the root surface (i.e. underlay).
int z_order_ = 0;
#if DCHECK_IS_ON()
// True if the content of the dcomp visual changed from the previous
// frame. Used for testing.
bool dcomp_visual_content_changed_from_previous_frame_ = false;
#endif // DCHECK_IS_ON()
};
VisualSubtree* GetFrontMostVisualSubtreeForTesting() const;
private:
// This function is called as part of |BuildTreeOptimized|.
// For each given overlay:
// 1. Populate visual subtree map with visual content.
// 2. Find the matching subtree from the previous frame. The subtree matches
// if it owns identical visual content. If the match is found:
// 2.1. Updates |overlay_index_to_reused_subtree| with the
// index to the matching subtree.
// 2.2. Updates |subtree_index_to_overlay| with the overlay index the
// previous frame subtree is matched to.
// Returns populated visual subtree map.
VisualSubtreeMap BuildMapAndAssignMatchingSubtrees(
const std::vector<DCLayerOverlayParams>& overlays,
std::vector<std::unique_ptr<VisualSubtree>>& visual_subtrees,
std::vector<std::optional<size_t>>& overlay_index_to_reused_subtree,
std::vector<std::optional<size_t>>& subtree_index_to_overlay);
// This function is called as part of |BuildTreeOptimized|.
// For each overlay that has no match attempts to find unused subtree of
// the previous frame to be reused in the current frame. If such a subtree
// is identified:
// 1. Updates |overlay_index_to_reused_subtree| with the
// index to the found subtree.
// 2. Updates |subtree_index_to_overlay| with the overlay index the
// found subtree is assigned to.
// Returns previous frame subtree first unused index.
size_t ReuseUnmatchedSubtrees(
std::vector<std::unique_ptr<VisualSubtree>>& new_visual_subtrees,
std::vector<std::optional<size_t>>& overlay_index_to_reused_subtree,
std::vector<std::optional<size_t>>& subtree_index_to_overlay);
// This function is called as part of |BuildTreeOptimized|.
// Detaches unused subtrees of the previous frame from root starting with
// |first_prev_frame_subtree_unused_index| returned from
// |ReuseUnmatchedSubtrees|.
// Updates |prev_subtree_is_attached_to_root| accordingly.
// Returns true if commit is needed.
bool DetachUnusedSubtreesFromRoot(
size_t first_prev_frame_subtree_unused_index,
std::vector<bool>& prev_subtree_is_attached_to_root);
// This function is called as part of |BuildTreeOptimized|.
// Removes reused subtrees of the previous frame from the root that need to
// be repositioned in the current frame.
// Updates |prev_subtree_is_attached_to_root| accordingly.
// Returns true if commit is needed.
bool DetachReusedSubtreesThatNeedRepositioningFromRoot(
const std::vector<std::unique_ptr<VisualSubtree>>& new_visual_subtrees,
const std::vector<std::optional<size_t>>&
overlay_index_to_reused_subtree,
const std::vector<std::optional<size_t>>& subtree_index_to_overlay,
std::vector<bool>& prev_subtree_is_attached_to_root);
// Detaches given subtree from the root.
void DetachSubtreeFromRoot(VisualSubtree* subtree);
// Tree that owns `this`.
const raw_ptr<DCLayerTree> dc_layer_tree_ = nullptr;
// List of DCOMP visual subtrees for previous frame.
std::vector<std::unique_ptr<VisualSubtree>> visual_subtrees_;
VisualSubtreeMap subtree_map_;
// List of layer IDs in the frame, parallel to `visual_subtrees_`.
std::vector<gfx::OverlayLayerId> layer_ids_for_testing_;
// Get the first subtree in `visual_subtrees_` matching `layer_id`.
const VisualSubtree* GetSubtreeFromLayerIdForTesting(
const gfx::OverlayLayerId& layer_id) const;
};
VisualTree::VisualSubtree* GetFrontMostVideoVisualSubtreeForTesting() const;
private:
const bool disable_nv12_dynamic_textures_;
const bool disable_vp_auto_hdr_;
const bool disable_vp_scaling_;
const bool disable_vp_super_resolution_;
const bool disable_dc_letterbox_video_optimization_;
const bool force_dcomp_triple_buffer_video_swap_chain_;
const bool no_downscaled_overlay_promotion_;
HWND window_;
Microsoft::WRL::ComPtr<ID3D11Device> d3d11_device_;
Microsoft::WRL::ComPtr<IDCompositionDevice3> dcomp_device_;
Microsoft::WRL::ComPtr<IDCompositionTarget> dcomp_target_;
// Resource pool which owns surfaces for solid color overlays. This is needed
// since there is no way to procedurally fill a DComp visual.
std::unique_ptr<SolidColorSurfacePool> solid_color_surface_pool_;
// Store the largest video processor for SDR and HDR content
// to avoid problems in (http://crbug.com/1121061) and
// (http://crbug.com/1472975).
VideoProcessorWrapper video_processor_wrapper_sdr_;
VideoProcessorWrapper video_processor_wrapper_hdr_;
// Current video processor input and output colorspace.
gfx::ColorSpace video_input_color_space_;
gfx::ColorSpace video_output_color_space_;
// Root direct composition visual for window dcomp target.
Microsoft::WRL::ComPtr<IDCompositionVisual2> dcomp_root_visual_;
// Map of layer ID to swap chain presenters for previous frame.
base::flat_map<gfx::OverlayLayerId, std::unique_ptr<SwapChainPresenter>>
video_swap_chains_;
// A tree that owns all DCOMP visuals for overlays along with attributes
// required to build DCOMP tree. It's updated for each frame.
std::unique_ptr<VisualTree> visual_tree_;
// dealing with hdr metadata
std::unique_ptr<HDRMetadataHelperWin> hdr_metadata_helper_;
// Renderer for drawing delegated ink trails using OS APIs. This is created
// when the DCLayerTree is created, but can only be queried to check if the
// platform supports delegated ink trails. It will be initialized via the
// call to MakeDelegatedInkOverlay when DCLayerTree has received a
// delegated_ink_metadata_ and CommitAndClearPendingOverlays is underway.
std::unique_ptr<DelegatedInkRenderer> ink_renderer_;
// Cache the metadata received by the DCLayerTree until it is time to
// CommitAndClearPendingOverlays. At that point the metadata will be moved
// to DelegatedInkPointRendererGPU.
std::unique_ptr<gfx::DelegatedInkMetadata> pending_delegated_ink_metadata_;
};
} // namespace gl
#endif // UI_GL_DC_LAYER_TREE_H_
|