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- // Copyright 2012 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "cc/layers/picture_layer_impl.h"
- #include <stddef.h>
- #include <stdint.h>
- #include <algorithm>
- #include <cmath>
- #include <limits>
- #include <memory>
- #include <set>
- #include <utility>
- #include "base/containers/contains.h"
- #include "base/cxx17_backports.h"
- #include "base/metrics/histogram_macros.h"
- #include "base/no_destructor.h"
- #include "base/system/sys_info.h"
- #include "base/time/time.h"
- #include "base/trace_event/traced_value.h"
- #include "build/build_config.h"
- #include "cc/base/math_util.h"
- #include "cc/benchmarks/micro_benchmark_impl.h"
- #include "cc/debug/debug_colors.h"
- #include "cc/layers/append_quads_data.h"
- #include "cc/layers/solid_color_layer_impl.h"
- #include "cc/paint/display_item_list.h"
- #include "cc/tiles/tile_manager.h"
- #include "cc/tiles/tiling_set_raster_queue_all.h"
- #include "cc/trees/effect_node.h"
- #include "cc/trees/layer_tree_impl.h"
- #include "cc/trees/occlusion.h"
- #include "cc/trees/transform_node.h"
- #include "components/viz/common/frame_sinks/begin_frame_args.h"
- #include "components/viz/common/quads/debug_border_draw_quad.h"
- #include "components/viz/common/quads/picture_draw_quad.h"
- #include "components/viz/common/quads/solid_color_draw_quad.h"
- #include "components/viz/common/quads/tile_draw_quad.h"
- #include "components/viz/common/traced_value.h"
- #include "ui/gfx/geometry/quad_f.h"
- #include "ui/gfx/geometry/rect_conversions.h"
- #include "ui/gfx/geometry/size_conversions.h"
- namespace cc {
- namespace {
- // This must be > 1 as we multiply or divide by this to find a new raster
- // scale during pinch.
- const float kMaxScaleRatioDuringPinch = 2.0f;
- // When creating a new tiling during pinch, snap to an existing
- // tiling's scale if the desired scale is within this ratio.
- const float kSnapToExistingTilingRatio = 1.2f;
- // Large contents scale can cause overflow issues. Cap the ideal contents scale
- // by this constant, since scales larger than this are usually not correct or
- // their scale doesn't matter as long as it's large. Content scales usually
- // closely match the default device-scale factor (so it's usually <= 5). See
- // Renderer4.IdealContentsScale UMA (deprecated) for distribution of content
- // scales.
- const float kMaxIdealContentsScale = 10000.f;
- // We try to avoid raster scale adjustment for will-change:transform for
- // performance, unless the scale is too small compared to the ideal scale and
- // the native scale.
- const float kMinScaleRatioForWillChangeTransform = 0.25f;
- // Used to avoid raster scale adjustment during a transform animation by
- // using the maximum animation scale, but sometimes the maximum animation scale
- // can't be accurately calculated (e.g. with nested scale transforms). We'll
- // adjust raster scale if it is not affected by invalid scale and is smaller
- // than the ideal scale divided by this ratio. The situation is rare.
- // See PropertyTrees::MaximumAnimationToScreenScale() and
- // AnimationAffectedByInvalidScale().
- const float kRatioToAdjustRasterScaleForTransformAnimation = 1.5f;
- // Intersect rects which may have right() and bottom() that overflow integer
- // boundaries. This code is similar to gfx::Rect::Intersect with the exception
- // that the types are promoted to int64_t when there is a chance of overflow.
- gfx::Rect SafeIntersectRects(const gfx::Rect& one, const gfx::Rect& two) {
- if (one.IsEmpty() || two.IsEmpty())
- return gfx::Rect();
- int rx = std::max(one.x(), two.x());
- int ry = std::max(one.y(), two.y());
- int64_t rr = std::min(static_cast<int64_t>(one.x()) + one.width(),
- static_cast<int64_t>(two.x()) + two.width());
- int64_t rb = std::min(static_cast<int64_t>(one.y()) + one.height(),
- static_cast<int64_t>(two.y()) + two.height());
- if (rx > rr || ry > rb)
- return gfx::Rect();
- return gfx::Rect(rx, ry, static_cast<int>(rr - rx),
- static_cast<int>(rb - ry));
- }
- } // namespace
- PictureLayerImpl::PictureLayerImpl(LayerTreeImpl* tree_impl, int id)
- : LayerImpl(tree_impl, id, /*will_always_push_properties=*/true),
- is_backdrop_filter_mask_(false),
- was_screen_space_transform_animating_(false),
- only_used_low_res_last_append_quads_(false),
- nearest_neighbor_(false),
- raster_source_size_changed_(false),
- directly_composited_image_default_raster_scale_changed_(false) {
- layer_tree_impl()->RegisterPictureLayerImpl(this);
- }
- PictureLayerImpl::~PictureLayerImpl() {
- if (twin_layer_)
- twin_layer_->twin_layer_ = nullptr;
- // We only track PaintWorklet-containing PictureLayerImpls on the pending
- // tree. However this deletion may happen outside the commit flow when we are
- // on the recycle tree instead, so just check !IsActiveTree().
- if (!paint_worklet_records_.empty() && !layer_tree_impl()->IsActiveTree())
- layer_tree_impl()->NotifyLayerHasPaintWorkletsChanged(this, false);
- // Similarly, AnimatedPaintWorkletTracker is only valid on the pending tree.
- if (!layer_tree_impl()->IsActiveTree()) {
- layer_tree_impl()
- ->paint_worklet_tracker()
- .UpdatePaintWorkletInputProperties({}, this);
- }
- layer_tree_impl()->UnregisterPictureLayerImpl(this);
- // Unregister for all images on the current raster source.
- UnregisterAnimatedImages();
- }
- const char* PictureLayerImpl::LayerTypeAsString() const {
- return "cc::PictureLayerImpl";
- }
- std::unique_ptr<LayerImpl> PictureLayerImpl::CreateLayerImpl(
- LayerTreeImpl* tree_impl) const {
- return PictureLayerImpl::Create(tree_impl, id());
- }
- void PictureLayerImpl::PushPropertiesTo(LayerImpl* base_layer) {
- PictureLayerImpl* layer_impl = static_cast<PictureLayerImpl*>(base_layer);
- LayerImpl::PushPropertiesTo(base_layer);
- // Twin relationships should never change once established.
- DCHECK(!twin_layer_ || twin_layer_ == layer_impl);
- DCHECK(!twin_layer_ || layer_impl->twin_layer_ == this);
- // The twin relationship does not need to exist before the first
- // PushPropertiesTo from pending to active layer since before that the active
- // layer can not have a pile or tilings, it has only been created and inserted
- // into the tree at that point.
- twin_layer_ = layer_impl;
- layer_impl->twin_layer_ = this;
- layer_impl->SetNearestNeighbor(nearest_neighbor_);
- layer_impl->SetDirectlyCompositedImageDefaultRasterScale(
- directly_composited_image_default_raster_scale_);
- layer_impl->SetIsBackdropFilterMask(is_backdrop_filter_mask_);
- // Solid color layers have no tilings.
- DCHECK(!raster_source_->IsSolidColor() || tilings_->num_tilings() == 0);
- // The pending tree should only have a high res (and possibly low res) tiling.
- DCHECK_LE(tilings_->num_tilings(),
- layer_tree_impl()->create_low_res_tiling() ? 2u : 1u);
- layer_impl->set_gpu_raster_max_texture_size(gpu_raster_max_texture_size_);
- layer_impl->UpdateRasterSource(raster_source_, &invalidation_, tilings_.get(),
- &paint_worklet_records_);
- DCHECK(invalidation_.IsEmpty());
- // After syncing a solid color layer, the active layer has no tilings.
- DCHECK(!raster_source_->IsSolidColor() ||
- layer_impl->tilings_->num_tilings() == 0);
- layer_impl->raster_page_scale_ = raster_page_scale_;
- layer_impl->raster_device_scale_ = raster_device_scale_;
- layer_impl->raster_source_scale_ = raster_source_scale_;
- layer_impl->raster_contents_scale_ = raster_contents_scale_;
- layer_impl->low_res_raster_contents_scale_ = low_res_raster_contents_scale_;
- // Simply push the value to the active tree without any extra invalidations,
- // since the pending tree tiles would have this handled. This is here to
- // ensure the state is consistent for future raster.
- layer_impl->lcd_text_disallowed_reason_ = lcd_text_disallowed_reason_;
- layer_impl->SanityCheckTilingState();
- }
- void PictureLayerImpl::AppendQuads(viz::CompositorRenderPass* render_pass,
- AppendQuadsData* append_quads_data) {
- // RenderSurfaceImpl::AppendQuads sets mask properties in the DrawQuad for
- // the masked surface, which will apply to both the backdrop filter and the
- // contents of the masked surface, so we should not append quads of the mask
- // layer in DstIn blend mode which would apply the mask in another codepath.
- if (is_backdrop_filter_mask_)
- return;
- // The bounds and the pile size may differ if the pile wasn't updated (ie.
- // PictureLayer::Update didn't happen). In that case the pile will be empty.
- DCHECK(raster_source_->GetSize().IsEmpty() ||
- bounds() == raster_source_->GetSize())
- << " bounds " << bounds().ToString() << " pile "
- << raster_source_->GetSize().ToString();
- viz::SharedQuadState* shared_quad_state =
- render_pass->CreateAndAppendSharedQuadState();
- if (raster_source_->IsSolidColor()) {
- // TODO(979672): This is still hard-coded at 1.0. This has some history:
- // - for crbug.com/769319, the contents scale was allowed to change, to
- // avoid blurring on high-dpi screens.
- // - for crbug.com/796558, the max device scale was hard-coded back to 1.0
- // for single-tile masks, to avoid problems with transforms.
- // To avoid those transform/scale bugs, this is currently left at 1.0. See
- // crbug.com/979672 for more context and test links.
- float max_contents_scale = 1;
- // The downstream CA layers use shared_quad_state to generate resources of
- // the right size even if it is a solid color picture layer.
- PopulateScaledSharedQuadState(shared_quad_state, max_contents_scale,
- contents_opaque());
- AppendDebugBorderQuad(render_pass, gfx::Rect(bounds()), shared_quad_state,
- append_quads_data);
- gfx::Rect scaled_visible_layer_rect =
- shared_quad_state->visible_quad_layer_rect;
- Occlusion occlusion = draw_properties().occlusion_in_content_space;
- EffectNode* effect_node = GetEffectTree().Node(effect_tree_index());
- SolidColorLayerImpl::AppendSolidQuads(
- render_pass, occlusion, shared_quad_state, scaled_visible_layer_rect,
- raster_source_->GetSolidColor(),
- !layer_tree_impl()->settings().enable_edge_anti_aliasing,
- effect_node->blend_mode, append_quads_data);
- return;
- }
- float device_scale_factor = layer_tree_impl()->device_scale_factor();
- // If we don't have tilings, we're likely going to append a checkerboard quad
- // the size of the layer. In that case, use scale 1 for more stable
- // to-screen-space mapping.
- float max_contents_scale =
- tilings_->num_tilings() ? MaximumTilingContentsScale() : 1.f;
- PopulateScaledSharedQuadState(shared_quad_state, max_contents_scale,
- contents_opaque());
- if (IsDirectlyCompositedImage()) {
- // Directly composited images should be clipped to the layer's content rect.
- // When a PictureLayerTiling is created for a directly composited image, the
- // layer bounds are multiplied by the raster scale in order to compute the
- // tile size. If the aspect ratio of the layer doesn't match that of the
- // image, it's possible that one of the dimensions of the resulting size
- // (layer bounds * raster scale) is a fractional number, as raster scale
- // does not scale x and y independently.
- // When this happens, the ToEnclosingRect() operation in
- // |PictureLayerTiling::EnclosingContentsRectFromLayer()| will
- // create a tiling that, when scaled by |max_contents_scale| above, is
- // larger than the layer bounds by a fraction of a pixel.
- gfx::Rect bounds_in_target_space = MathUtil::MapEnclosingClippedRect(
- draw_properties().target_space_transform, gfx::Rect(bounds()));
- if (is_clipped())
- bounds_in_target_space.Intersect(draw_properties().clip_rect);
- if (shared_quad_state->clip_rect)
- bounds_in_target_space.Intersect(*shared_quad_state->clip_rect);
- shared_quad_state->clip_rect = bounds_in_target_space;
- #if DCHECK_IS_ON()
- // Validate that the tile and bounds size are always within one pixel.
- PictureLayerTiling* high_res =
- tilings_->FindTilingWithResolution(HIGH_RESOLUTION);
- if (high_res) {
- const float epsilon = 1.f;
- gfx::SizeF scaled_tiling_size(high_res->tiling_size());
- scaled_tiling_size.Scale(1 / raster_contents_scale_.x(),
- 1 / raster_contents_scale_.y());
- if (raster_contents_scale_.x() >= 1.f)
- DCHECK(std::abs(bounds().width() - scaled_tiling_size.width()) <
- epsilon);
- if (raster_contents_scale_.y() >= 1.f)
- DCHECK(std::abs(bounds().height() - scaled_tiling_size.height()) <
- epsilon);
- }
- #endif
- }
- Occlusion scaled_occlusion =
- draw_properties()
- .occlusion_in_content_space.GetOcclusionWithGivenDrawTransform(
- shared_quad_state->quad_to_target_transform);
- if (current_draw_mode_ == DRAW_MODE_RESOURCELESS_SOFTWARE) {
- DCHECK(shared_quad_state->quad_layer_rect.origin() == gfx::Point(0, 0));
- AppendDebugBorderQuad(
- render_pass, shared_quad_state->quad_layer_rect, shared_quad_state,
- append_quads_data, DebugColors::DirectPictureBorderColor(),
- DebugColors::DirectPictureBorderWidth(device_scale_factor));
- gfx::Rect geometry_rect = shared_quad_state->visible_quad_layer_rect;
- gfx::Rect visible_geometry_rect =
- scaled_occlusion.GetUnoccludedContentRect(geometry_rect);
- bool needs_blending = !contents_opaque();
- // The raster source may not be valid over the entire visible rect,
- // and rastering outside of that may cause incorrect pixels.
- gfx::Rect scaled_recorded_viewport = gfx::ScaleToEnclosingRect(
- raster_source_->RecordedViewport(), max_contents_scale);
- geometry_rect.Intersect(scaled_recorded_viewport);
- visible_geometry_rect.Intersect(scaled_recorded_viewport);
- if (visible_geometry_rect.IsEmpty())
- return;
- DCHECK(raster_source_->HasRecordings());
- gfx::Rect quad_content_rect = shared_quad_state->visible_quad_layer_rect;
- gfx::Size texture_size = quad_content_rect.size();
- gfx::RectF texture_rect = gfx::RectF(gfx::SizeF(texture_size));
- viz::PictureDrawQuad::ImageAnimationMap image_animation_map;
- const auto* controller = layer_tree_impl()->image_animation_controller();
- WhichTree tree = layer_tree_impl()->IsPendingTree()
- ? WhichTree::PENDING_TREE
- : WhichTree::ACTIVE_TREE;
- for (const auto& image_data : raster_source_->GetDisplayItemList()
- ->discardable_image_map()
- .animated_images_metadata()) {
- image_animation_map[image_data.paint_image_id] =
- controller->GetFrameIndexForImage(image_data.paint_image_id, tree);
- }
- auto* quad = render_pass->CreateAndAppendDrawQuad<viz::PictureDrawQuad>();
- quad->SetNew(shared_quad_state, geometry_rect, visible_geometry_rect,
- needs_blending, texture_rect, texture_size, nearest_neighbor_,
- viz::RGBA_8888, quad_content_rect, max_contents_scale,
- std::move(image_animation_map),
- raster_source_->GetDisplayItemList());
- ValidateQuadResources(quad);
- return;
- }
- // If we're doing a regular AppendQuads (ie, not solid color or resourceless
- // software draw, and if the visible rect is scrolled far enough away, then we
- // may run into a floating point precision in AA calculations in the renderer.
- // See crbug.com/765297. In order to avoid this, we shift the quads up from
- // where they logically reside and adjust the shared_quad_state's transform
- // instead. We only do this in a scale/translate matrices to ensure the math
- // is correct.
- gfx::Vector2d quad_offset;
- if (shared_quad_state->quad_to_target_transform.IsScaleOrTranslation()) {
- const auto& visible_rect = shared_quad_state->visible_quad_layer_rect;
- quad_offset = gfx::Vector2d(-visible_rect.x(), -visible_rect.y());
- }
- gfx::Rect debug_border_rect(shared_quad_state->quad_layer_rect);
- debug_border_rect.Offset(quad_offset);
- AppendDebugBorderQuad(render_pass, debug_border_rect, shared_quad_state,
- append_quads_data);
- if (ShowDebugBorders(DebugBorderType::LAYER)) {
- for (PictureLayerTilingSet::CoverageIterator iter(
- tilings_.get(), max_contents_scale,
- shared_quad_state->visible_quad_layer_rect,
- ideal_contents_scale_key());
- iter; ++iter) {
- SkColor4f color;
- float width;
- if (*iter && iter->draw_info().IsReadyToDraw()) {
- TileDrawInfo::Mode mode = iter->draw_info().mode();
- if (mode == TileDrawInfo::SOLID_COLOR_MODE) {
- color = DebugColors::SolidColorTileBorderColor();
- width = DebugColors::SolidColorTileBorderWidth(device_scale_factor);
- } else if (mode == TileDrawInfo::OOM_MODE) {
- color = DebugColors::OOMTileBorderColor();
- width = DebugColors::OOMTileBorderWidth(device_scale_factor);
- } else if (iter.resolution() == HIGH_RESOLUTION) {
- color = DebugColors::HighResTileBorderColor();
- width = DebugColors::HighResTileBorderWidth(device_scale_factor);
- } else if (iter.resolution() == LOW_RESOLUTION) {
- color = DebugColors::LowResTileBorderColor();
- width = DebugColors::LowResTileBorderWidth(device_scale_factor);
- } else if (iter->contents_scale_key() > max_contents_scale) {
- color = DebugColors::ExtraHighResTileBorderColor();
- width = DebugColors::ExtraHighResTileBorderWidth(device_scale_factor);
- } else {
- color = DebugColors::ExtraLowResTileBorderColor();
- width = DebugColors::ExtraLowResTileBorderWidth(device_scale_factor);
- }
- } else {
- color = DebugColors::MissingTileBorderColor();
- width = DebugColors::MissingTileBorderWidth(device_scale_factor);
- }
- auto* debug_border_quad =
- render_pass->CreateAndAppendDrawQuad<viz::DebugBorderDrawQuad>();
- gfx::Rect geometry_rect = iter.geometry_rect();
- geometry_rect.Offset(quad_offset);
- gfx::Rect visible_geometry_rect = geometry_rect;
- debug_border_quad->SetNew(shared_quad_state, geometry_rect,
- visible_geometry_rect, color, width);
- }
- }
- if (layer_tree_impl()->debug_state().highlight_non_lcd_text_layers) {
- SkColor4f color =
- DebugColors::NonLCDTextHighlightColor(lcd_text_disallowed_reason());
- if (color != SkColors::kTransparent &&
- GetRasterSource()->GetDisplayItemList()->AreaOfDrawText(
- gfx::Rect(bounds()))) {
- render_pass->CreateAndAppendDrawQuad<viz::SolidColorDrawQuad>()->SetNew(
- shared_quad_state, debug_border_rect, debug_border_rect, color,
- append_quads_data);
- }
- }
- // Keep track of the tilings that were used so that tilings that are
- // unused can be considered for removal.
- last_append_quads_tilings_.clear();
- // Ignore missing tiles outside of viewport for tile priority. This is
- // normally the same as draw viewport but can be independently overridden by
- // embedders like Android WebView with SetExternalTilePriorityConstraints.
- gfx::Rect scaled_viewport_for_tile_priority = gfx::ScaleToEnclosingRect(
- viewport_rect_for_tile_priority_in_content_space_, max_contents_scale);
- size_t missing_tile_count = 0u;
- size_t on_demand_missing_tile_count = 0u;
- only_used_low_res_last_append_quads_ = true;
- gfx::Rect scaled_recorded_viewport = gfx::ScaleToEnclosingRect(
- raster_source_->RecordedViewport(), max_contents_scale);
- for (PictureLayerTilingSet::CoverageIterator iter(
- tilings_.get(), max_contents_scale,
- shared_quad_state->visible_quad_layer_rect,
- ideal_contents_scale_key());
- iter; ++iter) {
- gfx::Rect geometry_rect = iter.geometry_rect();
- gfx::Rect visible_geometry_rect =
- scaled_occlusion.GetUnoccludedContentRect(geometry_rect);
- gfx::Rect offset_geometry_rect = geometry_rect;
- offset_geometry_rect.Offset(quad_offset);
- gfx::Rect offset_visible_geometry_rect = visible_geometry_rect;
- offset_visible_geometry_rect.Offset(quad_offset);
- bool needs_blending = !contents_opaque();
- if (visible_geometry_rect.IsEmpty())
- continue;
- int64_t visible_geometry_area =
- static_cast<int64_t>(visible_geometry_rect.width()) *
- visible_geometry_rect.height();
- append_quads_data->visible_layer_area += visible_geometry_area;
- bool has_draw_quad = false;
- if (*iter && iter->draw_info().IsReadyToDraw()) {
- const TileDrawInfo& draw_info = iter->draw_info();
- switch (draw_info.mode()) {
- case TileDrawInfo::RESOURCE_MODE: {
- gfx::RectF texture_rect = iter.texture_rect();
- // The raster_contents_scale_ is the best scale that the layer is
- // trying to produce, even though it may not be ideal. Since that's
- // the best the layer can promise in the future, consider those as
- // complete. But if a tile is ideal scale, we don't want to consider
- // it incomplete and trying to replace it with a tile at a worse
- // scale.
- if (iter->contents_scale_key() != raster_contents_scale_key() &&
- iter->contents_scale_key() != ideal_contents_scale_key() &&
- geometry_rect.Intersects(scaled_viewport_for_tile_priority)) {
- append_quads_data->num_incomplete_tiles++;
- }
- auto* quad =
- render_pass->CreateAndAppendDrawQuad<viz::TileDrawQuad>();
- quad->SetNew(
- shared_quad_state, offset_geometry_rect,
- offset_visible_geometry_rect, needs_blending,
- draw_info.resource_id_for_export(), texture_rect,
- draw_info.resource_size(), draw_info.is_premultiplied(),
- nearest_neighbor_,
- !layer_tree_impl()->settings().enable_edge_anti_aliasing);
- ValidateQuadResources(quad);
- has_draw_quad = true;
- break;
- }
- case TileDrawInfo::SOLID_COLOR_MODE: {
- float alpha = draw_info.solid_color().fA * shared_quad_state->opacity;
- if (alpha >= std::numeric_limits<float>::epsilon()) {
- auto* quad =
- render_pass->CreateAndAppendDrawQuad<viz::SolidColorDrawQuad>();
- quad->SetNew(
- shared_quad_state, offset_geometry_rect,
- offset_visible_geometry_rect, draw_info.solid_color(),
- !layer_tree_impl()->settings().enable_edge_anti_aliasing);
- ValidateQuadResources(quad);
- }
- has_draw_quad = true;
- break;
- }
- case TileDrawInfo::OOM_MODE:
- break; // Checkerboard.
- }
- }
- if (!has_draw_quad) {
- // Checkerboard.
- SkColor4f color = safe_opaque_background_color();
- if (ShowDebugBorders(DebugBorderType::LAYER)) {
- // Fill the whole tile with the missing tile color.
- color = DebugColors::DefaultCheckerboardColor();
- }
- auto* quad =
- render_pass->CreateAndAppendDrawQuad<viz::SolidColorDrawQuad>();
- quad->SetNew(shared_quad_state, offset_geometry_rect,
- offset_visible_geometry_rect, color, false);
- ValidateQuadResources(quad);
- if (geometry_rect.Intersects(scaled_viewport_for_tile_priority)) {
- append_quads_data->num_missing_tiles++;
- ++missing_tile_count;
- }
- append_quads_data->checkerboarded_visible_content_area +=
- visible_geometry_area;
- // Intersect checkerboard rect with interest rect to generate rect where
- // we checkerboarded and has recording. The area where we don't have
- // recording is not necessarily a Rect, and its area is calculated using
- // subtraction.
- gfx::Rect visible_rect_has_recording = visible_geometry_rect;
- visible_rect_has_recording.Intersect(scaled_recorded_viewport);
- int64_t checkerboarded_has_recording_area =
- static_cast<int64_t>(visible_rect_has_recording.width()) *
- visible_rect_has_recording.height();
- append_quads_data->checkerboarded_needs_raster_content_area +=
- checkerboarded_has_recording_area;
- append_quads_data->checkerboarded_no_recording_content_area +=
- visible_geometry_area - checkerboarded_has_recording_area;
- // Report data on any missing images that might be the largest
- // contentful image.
- if (*iter) {
- UMA_HISTOGRAM_BOOLEAN(
- "Compositing.DecodeLCPCandidateImage.MissedDeadline",
- iter->HasMissingLCPCandidateImages());
- }
- continue;
- }
- if (iter.resolution() != HIGH_RESOLUTION) {
- append_quads_data->approximated_visible_content_area +=
- visible_geometry_area;
- }
- // If we have a draw quad, but it's not low resolution, then
- // mark that we've used something other than low res to draw.
- if (iter.resolution() != LOW_RESOLUTION)
- only_used_low_res_last_append_quads_ = false;
- if (last_append_quads_tilings_.empty() ||
- last_append_quads_tilings_.back() != iter.CurrentTiling()) {
- last_append_quads_tilings_.push_back(iter.CurrentTiling());
- }
- }
- // Adjust shared_quad_state with the quad_offset, since we've adjusted each
- // quad we've appended by it.
- shared_quad_state->quad_to_target_transform.Translate(-quad_offset);
- shared_quad_state->quad_layer_rect.Offset(quad_offset);
- shared_quad_state->visible_quad_layer_rect.Offset(quad_offset);
- if (missing_tile_count) {
- TRACE_EVENT_INSTANT2("cc",
- "PictureLayerImpl::AppendQuads checkerboard",
- TRACE_EVENT_SCOPE_THREAD,
- "missing_tile_count",
- missing_tile_count,
- "on_demand_missing_tile_count",
- on_demand_missing_tile_count);
- }
- // Aggressively remove any tilings that are not seen to save memory. Note
- // that this is at the expense of doing cause more frequent re-painting. A
- // better scheme would be to maintain a tighter visible_layer_rect for the
- // finer tilings.
- CleanUpTilingsOnActiveLayer(last_append_quads_tilings_);
- SanityCheckTilingState();
- }
- bool PictureLayerImpl::UpdateTiles() {
- if (!CanHaveTilings()) {
- ideal_page_scale_ = 0.f;
- ideal_device_scale_ = 0.f;
- ideal_contents_scale_ = gfx::Vector2dF(0.f, 0.f);
- ideal_source_scale_ = gfx::Vector2dF(0.f, 0.f);
- SanityCheckTilingState();
- return false;
- }
- // Remove any non-ideal tilings that were not used last time we generated
- // quads to save memory and processing time. Note that pending tree should
- // only have one or two tilings (high and low res), so only clean up the
- // active layer. This cleans it up here in case AppendQuads didn't run.
- // If it did run, this would not remove any additional tilings.
- if (layer_tree_impl()->IsActiveTree())
- CleanUpTilingsOnActiveLayer(last_append_quads_tilings_);
- UpdateIdealScales();
- const bool should_adjust_raster_scale = ShouldAdjustRasterScale();
- if (should_adjust_raster_scale)
- RecalculateRasterScales();
- UpdateTilingsForRasterScaleAndTranslation(should_adjust_raster_scale);
- raster_source_size_changed_ = false;
- if (layer_tree_impl()->IsActiveTree())
- AddLowResolutionTilingIfNeeded();
- DCHECK(raster_page_scale_);
- DCHECK(raster_device_scale_);
- DCHECK(raster_source_scale_.x());
- DCHECK(raster_source_scale_.y());
- DCHECK(raster_contents_scale_.x());
- DCHECK(raster_contents_scale_.y());
- DCHECK(low_res_raster_contents_scale_);
- was_screen_space_transform_animating_ =
- draw_properties().screen_space_transform_is_animating;
- double current_frame_time_in_seconds =
- (layer_tree_impl()->CurrentBeginFrameArgs().frame_time -
- base::TimeTicks()).InSecondsF();
- UpdateViewportRectForTilePriorityInContentSpace();
- // The tiling set can require tiles for activation any of the following
- // conditions are true:
- // - This layer produced a high-res or non-ideal-res tile last frame.
- // - We're in requires high res to draw mode.
- // - We're not in smoothness takes priority mode.
- // To put different, the tiling set can't require tiles for activation if
- // we're in smoothness mode and only used low-res or checkerboard to draw last
- // frame and we don't need high res to draw.
- //
- // The reason for this is that we should be able to activate sooner and get a
- // more up to date recording, so we don't run out of recording on the active
- // tree.
- // A layer must be a drawing layer for it to require tiles for activation.
- bool can_require_tiles_for_activation = false;
- if (contributes_to_drawn_render_surface()) {
- can_require_tiles_for_activation =
- !only_used_low_res_last_append_quads_ || RequiresHighResToDraw() ||
- !layer_tree_impl()->SmoothnessTakesPriority();
- }
- static const base::NoDestructor<Occlusion> kEmptyOcclusion;
- const Occlusion& occlusion_in_content_space =
- layer_tree_impl()->settings().use_occlusion_for_tile_prioritization
- ? draw_properties().occlusion_in_content_space
- : *kEmptyOcclusion;
- // Pass |occlusion_in_content_space| for |occlusion_in_layer_space| since
- // they are the same space in picture layer, as contents scale is always 1.
- bool updated = tilings_->UpdateTilePriorities(
- viewport_rect_for_tile_priority_in_content_space_,
- ideal_contents_scale_key(), current_frame_time_in_seconds,
- occlusion_in_content_space, can_require_tiles_for_activation);
- DCHECK_GT(tilings_->num_tilings(), 0u);
- SanityCheckTilingState();
- return updated;
- }
- void PictureLayerImpl::UpdateViewportRectForTilePriorityInContentSpace() {
- // If visible_layer_rect() is empty or viewport_rect_for_tile_priority is
- // set to be different from the device viewport, try to inverse project the
- // viewport into layer space and use that. Otherwise just use
- // visible_layer_rect().
- gfx::Rect visible_rect_in_content_space = visible_layer_rect();
- gfx::Rect viewport_rect_for_tile_priority =
- layer_tree_impl()->ViewportRectForTilePriority();
- if (visible_rect_in_content_space.IsEmpty() ||
- layer_tree_impl()->GetDeviceViewport() !=
- viewport_rect_for_tile_priority) {
- gfx::Transform view_to_layer(gfx::Transform::kSkipInitialization);
- if (ScreenSpaceTransform().GetInverse(&view_to_layer)) {
- // Transform from view space to content space.
- visible_rect_in_content_space = MathUtil::ProjectEnclosingClippedRect(
- view_to_layer, viewport_rect_for_tile_priority);
- // We have to allow for a viewport that is outside of the layer bounds in
- // order to compute tile priorities correctly for offscreen content that
- // is going to make it on screen. However, we also have to limit the
- // viewport since it can be very large due to screen_space_transforms. As
- // a heuristic, we clip to bounds padded by skewport_extrapolation_limit *
- // maximum tiling scale, since this should allow sufficient room for
- // skewport calculations.
- gfx::Rect padded_bounds(bounds());
- int padding_amount = layer_tree_impl()
- ->settings()
- .skewport_extrapolation_limit_in_screen_pixels *
- MaximumTilingContentsScale();
- padded_bounds.Inset(-padding_amount);
- visible_rect_in_content_space =
- SafeIntersectRects(visible_rect_in_content_space, padded_bounds);
- }
- }
- viewport_rect_for_tile_priority_in_content_space_ =
- visible_rect_in_content_space;
- }
- PictureLayerImpl* PictureLayerImpl::GetPendingOrActiveTwinLayer() const {
- if (!twin_layer_ || !twin_layer_->IsOnActiveOrPendingTree())
- return nullptr;
- return twin_layer_;
- }
- void PictureLayerImpl::UpdateRasterSource(
- scoped_refptr<RasterSource> raster_source,
- Region* new_invalidation,
- const PictureLayerTilingSet* pending_set,
- const PaintWorkletRecordMap* pending_paint_worklet_records) {
- // The bounds and the pile size may differ if the pile wasn't updated (ie.
- // PictureLayer::Update didn't happen). In that case the pile will be empty.
- DCHECK(raster_source->GetSize().IsEmpty() ||
- bounds() == raster_source->GetSize())
- << " bounds " << bounds().ToString() << " pile "
- << raster_source->GetSize().ToString();
- if (!raster_source_ || raster_source_->GetSize() != raster_source->GetSize())
- raster_source_size_changed_ = true;
- // We have an updated recording if the DisplayItemList in the new RasterSource
- // is different.
- const bool recording_updated =
- !raster_source_ || raster_source_->GetDisplayItemList() !=
- raster_source->GetDisplayItemList();
- // Unregister for all images on the current raster source, if the recording
- // was updated.
- if (recording_updated) {
- UnregisterAnimatedImages();
- // When the display list changes, the set of PaintWorklets may also change.
- if (pending_paint_worklet_records) {
- paint_worklet_records_ = *pending_paint_worklet_records;
- } else {
- if (raster_source->GetDisplayItemList()) {
- SetPaintWorkletInputs(raster_source->GetDisplayItemList()
- ->discardable_image_map()
- .paint_worklet_inputs());
- } else {
- SetPaintWorkletInputs({});
- }
- }
- // If the MSAA sample count has changed, we need to re-raster the complete
- // layer.
- if (raster_source_) {
- const auto& current_display_item_list =
- raster_source_->GetDisplayItemList();
- const auto& new_display_item_list = raster_source->GetDisplayItemList();
- if (current_display_item_list && new_display_item_list) {
- bool needs_full_invalidation =
- layer_tree_impl()->GetMSAASampleCountForRaster(
- current_display_item_list) !=
- layer_tree_impl()->GetMSAASampleCountForRaster(
- new_display_item_list);
- needs_full_invalidation |=
- layer_tree_impl()->GetTargetColorParams(
- current_display_item_list->discardable_image_map()
- .content_color_usage()) !=
- layer_tree_impl()->GetTargetColorParams(
- new_display_item_list->discardable_image_map()
- .content_color_usage());
- if (needs_full_invalidation)
- new_invalidation->Union(gfx::Rect(raster_source->GetSize()));
- }
- }
- }
- // The |raster_source_| is initially null, so have to check for that for the
- // first frame.
- bool could_have_tilings = CanHaveTilings();
- raster_source_.swap(raster_source);
- raster_source_->set_debug_name(DebugName());
- // Register images from the new raster source, if the recording was updated.
- // TODO(khushalsagar): UMA the number of animated images in layer?
- if (recording_updated)
- RegisterAnimatedImages();
- // The |new_invalidation| must be cleared before updating tilings since they
- // access the invalidation through the PictureLayerTilingClient interface.
- invalidation_.Clear();
- invalidation_.Swap(new_invalidation);
- bool can_have_tilings = CanHaveTilings();
- DCHECK(!pending_set ||
- can_have_tilings == GetPendingOrActiveTwinLayer()->CanHaveTilings());
- // Need to call UpdateTiles again if CanHaveTilings changed.
- if (could_have_tilings != can_have_tilings)
- layer_tree_impl()->set_needs_update_draw_properties();
- if (!can_have_tilings) {
- RemoveAllTilings();
- return;
- }
- // We could do this after doing UpdateTiles, which would avoid doing this for
- // tilings that are going to disappear on the pending tree (if scale changed).
- // But that would also be more complicated, so we just do it here for now.
- //
- // TODO(crbug.com/843787): If the LayerTreeFrameSink is lost, and we activate,
- // this ends up running with the old LayerTreeFrameSink, or possibly with a
- // null LayerTreeFrameSink, which can give incorrect results or maybe crash.
- if (pending_set) {
- tilings_->UpdateTilingsToCurrentRasterSourceForActivation(
- raster_source_, pending_set, invalidation_, MinimumContentsScale(),
- MaximumContentsScale());
- } else {
- tilings_->UpdateTilingsToCurrentRasterSourceForCommit(
- raster_source_, invalidation_, MinimumContentsScale(),
- MaximumContentsScale());
- // We're in a commit, make sure to update the state of the checker image
- // tracker with the new async attribute data.
- layer_tree_impl()->UpdateImageDecodingHints(
- raster_source_->TakeDecodingModeMap());
- }
- }
- void PictureLayerImpl::UpdateCanUseLCDText(
- bool raster_translation_aligns_pixels) {
- // If we have pending/active trees, the active tree doesn't update lcd text
- // status but copies it from the pending tree.
- if (!layer_tree_impl()->IsSyncTree())
- return;
- lcd_text_disallowed_reason_ =
- ComputeLCDTextDisallowedReason(raster_translation_aligns_pixels);
- }
- bool PictureLayerImpl::AffectedByWillChangeTransformHint() const {
- TransformNode* transform_node =
- GetTransformTree().Node(transform_tree_index());
- return transform_node &&
- transform_node->node_or_ancestors_will_change_transform;
- }
- LCDTextDisallowedReason PictureLayerImpl::ComputeLCDTextDisallowedReason(
- bool raster_translation_aligns_pixels) const {
- // No need to use LCD text if there is no text.
- if (!raster_source_ || !raster_source_->GetDisplayItemList() ||
- !raster_source_->GetDisplayItemList()->has_draw_text_ops()) {
- return LCDTextDisallowedReason::kNoText;
- }
- if (layer_tree_impl()->settings().layers_always_allowed_lcd_text)
- return LCDTextDisallowedReason::kNone;
- if (!layer_tree_impl()->settings().can_use_lcd_text)
- return LCDTextDisallowedReason::kSetting;
- if (!contents_opaque_for_text()) {
- if (!background_color().isOpaque())
- return LCDTextDisallowedReason::kBackgroundColorNotOpaque;
- return LCDTextDisallowedReason::kContentsNotOpaque;
- }
- // If raster translation aligns pixels, we can ignore fractional layer offset
- // and transform for LCD text.
- if (!raster_translation_aligns_pixels) {
- if (static_cast<int>(offset_to_transform_parent().x()) !=
- offset_to_transform_parent().x())
- return LCDTextDisallowedReason::kNonIntegralXOffset;
- if (static_cast<int>(offset_to_transform_parent().y()) !=
- offset_to_transform_parent().y())
- return LCDTextDisallowedReason::kNonIntegralYOffset;
- return LCDTextDisallowedReason::kNonIntegralTranslation;
- }
- TransformNode* transform_node =
- GetTransformTree().Node(transform_tree_index());
- if (transform_node->node_or_ancestors_will_change_transform)
- return LCDTextDisallowedReason::kWillChangeTransform;
- if (screen_space_transform_is_animating())
- return LCDTextDisallowedReason::kTransformAnimation;
- EffectNode* effect_node = GetEffectTree().Node(effect_tree_index());
- if (effect_node->node_or_ancestor_has_filters ||
- effect_node->affected_by_backdrop_filter)
- return LCDTextDisallowedReason::kPixelOrColorEffect;
- return LCDTextDisallowedReason::kNone;
- }
- LCDTextDisallowedReason
- PictureLayerImpl::ComputeLCDTextDisallowedReasonForTesting() const {
- gfx::Vector2dF raster_translation;
- return ComputeLCDTextDisallowedReason(
- CalculateRasterTranslation(raster_translation));
- }
- void PictureLayerImpl::NotifyTileStateChanged(const Tile* tile) {
- if (layer_tree_impl()->IsActiveTree())
- damage_rect_.Union(tile->enclosing_layer_rect());
- if (tile->draw_info().NeedsRaster()) {
- PictureLayerTiling* tiling =
- tilings_->FindTilingWithScaleKey(tile->contents_scale_key());
- if (tiling)
- tiling->set_all_tiles_done(false);
- }
- }
- gfx::Rect PictureLayerImpl::GetDamageRect() const {
- return damage_rect_;
- }
- void PictureLayerImpl::ResetChangeTracking() {
- LayerImpl::ResetChangeTracking();
- damage_rect_.SetRect(0, 0, 0, 0);
- }
- void PictureLayerImpl::DidBeginTracing() {
- raster_source_->DidBeginTracing();
- }
- void PictureLayerImpl::ReleaseResources() {
- tilings_->ReleaseAllResources();
- ResetRasterScale();
- }
- void PictureLayerImpl::ReleaseTileResources() {
- // All resources are tile resources.
- ReleaseResources();
- }
- void PictureLayerImpl::RecreateTileResources() {
- // Recreate tilings with new settings, since some of those might change when
- // we release resources.
- tilings_ = CreatePictureLayerTilingSet();
- }
- Region PictureLayerImpl::GetInvalidationRegionForDebugging() {
- // |invalidation_| gives the invalidation contained in the source frame, but
- // is not cleared after drawing from the layer. However, update_rect() is
- // cleared once the invalidation is drawn, which is useful for debugging
- // visualizations. This method intersects the two to give a more exact
- // representation of what was invalidated that is cleared after drawing.
- return IntersectRegions(invalidation_, update_rect());
- }
- std::unique_ptr<Tile> PictureLayerImpl::CreateTile(
- const Tile::CreateInfo& info) {
- int flags = 0;
- // We don't handle solid color single texture masks for backdrop filters,
- // so we shouldn't bother analyzing those.
- // Otherwise, always analyze to maximize memory savings.
- if (!is_backdrop_filter_mask_)
- flags = Tile::USE_PICTURE_ANALYSIS;
- if (contents_opaque())
- flags |= Tile::IS_OPAQUE;
- return layer_tree_impl()->tile_manager()->CreateTile(
- info, id(), layer_tree_impl()->source_frame_number(), flags);
- }
- const Region* PictureLayerImpl::GetPendingInvalidation() {
- if (layer_tree_impl()->IsPendingTree())
- return &invalidation_;
- if (layer_tree_impl()->IsRecycleTree())
- return nullptr;
- DCHECK(layer_tree_impl()->IsActiveTree());
- if (PictureLayerImpl* twin_layer = GetPendingOrActiveTwinLayer())
- return &twin_layer->invalidation_;
- return nullptr;
- }
- const PictureLayerTiling* PictureLayerImpl::GetPendingOrActiveTwinTiling(
- const PictureLayerTiling* tiling) const {
- PictureLayerImpl* twin_layer = GetPendingOrActiveTwinLayer();
- if (!twin_layer)
- return nullptr;
- const PictureLayerTiling* twin_tiling =
- twin_layer->tilings_->FindTilingWithScaleKey(
- tiling->contents_scale_key());
- if (twin_tiling &&
- twin_tiling->raster_transform() == tiling->raster_transform())
- return twin_tiling;
- return nullptr;
- }
- bool PictureLayerImpl::RequiresHighResToDraw() const {
- return layer_tree_impl()->RequiresHighResToDraw();
- }
- const PaintWorkletRecordMap& PictureLayerImpl::GetPaintWorkletRecords() const {
- return paint_worklet_records_;
- }
- bool PictureLayerImpl::IsDirectlyCompositedImage() const {
- return directly_composited_image_default_raster_scale_ > 0.f;
- }
- bool PictureLayerImpl::ScrollInteractionInProgress() const {
- return layer_tree_impl()->GetActivelyScrollingType() !=
- ActivelyScrollingType::kNone;
- }
- bool PictureLayerImpl::CurrentScrollCheckerboardsDueToNoRecording() const {
- return layer_tree_impl()->CurrentScrollCheckerboardsDueToNoRecording();
- }
- gfx::Rect PictureLayerImpl::GetEnclosingVisibleRectInTargetSpace() const {
- return GetScaledEnclosingVisibleRectInTargetSpace(
- MaximumTilingContentsScale());
- }
- bool PictureLayerImpl::ShouldAnimate(PaintImage::Id paint_image_id) const {
- // If we are registered with the animation controller, which queries whether
- // the image should be animated, then we must have recordings with this image.
- DCHECK(raster_source_);
- DCHECK(raster_source_->GetDisplayItemList());
- DCHECK(
- !raster_source_->GetDisplayItemList()->discardable_image_map().empty());
- // Only animate images for layers which HasValidTilePriorities. This check is
- // important for 2 reasons:
- // 1) It avoids doing additional work for layers we don't plan to rasterize
- // and/or draw. The updated state will be pulled by the animation system
- // if the draw properties change.
- // 2) It eliminates considering layers on the recycle tree. Once the pending
- // tree is activated, the layers on the recycle tree remain registered as
- // animation drivers, but should not drive animations since they don't have
- // updated draw properties.
- //
- // Additionally only animate images which are on-screen, animations are
- // paused once they are not visible.
- if (!HasValidTilePriorities())
- return false;
- const auto& rects = raster_source_->GetDisplayItemList()
- ->discardable_image_map()
- .GetRectsForImage(paint_image_id);
- for (const auto& r : rects.container()) {
- if (r.Intersects(visible_layer_rect()))
- return true;
- }
- return false;
- }
- gfx::Size PictureLayerImpl::CalculateTileSize(const gfx::Size& content_bounds) {
- content_bounds_ = content_bounds;
- return tile_size_calculator_.CalculateTileSize();
- }
- void PictureLayerImpl::GetContentsResourceId(
- viz::ResourceId* resource_id,
- gfx::Size* resource_size,
- gfx::SizeF* resource_uv_size) const {
- // We need contents resource for backdrop filter masks only.
- if (!is_backdrop_filter_mask()) {
- *resource_id = viz::kInvalidResourceId;
- return;
- }
- // The bounds and the pile size may differ if the pile wasn't updated (ie.
- // PictureLayer::Update didn't happen). In that case the pile will be empty.
- DCHECK(raster_source_->GetSize().IsEmpty() ||
- bounds() == raster_source_->GetSize())
- << " bounds " << bounds().ToString() << " pile "
- << raster_source_->GetSize().ToString();
- float dest_scale = MaximumTilingContentsScale();
- gfx::Rect content_rect =
- gfx::ScaleToEnclosingRect(gfx::Rect(bounds()), dest_scale);
- PictureLayerTilingSet::CoverageIterator iter(
- tilings_.get(), dest_scale, content_rect, ideal_contents_scale_key());
- // Mask resource not ready yet.
- if (!iter || !*iter) {
- *resource_id = viz::kInvalidResourceId;
- return;
- }
- // Masks only supported if they fit on exactly one tile.
- DCHECK(iter.geometry_rect() == content_rect)
- << "iter rect " << iter.geometry_rect().ToString() << " content rect "
- << content_rect.ToString();
- const TileDrawInfo& draw_info = iter->draw_info();
- if (!draw_info.IsReadyToDraw() ||
- draw_info.mode() != TileDrawInfo::RESOURCE_MODE) {
- *resource_id = viz::kInvalidResourceId;
- return;
- }
- *resource_id = draw_info.resource_id_for_export();
- *resource_size = draw_info.resource_size();
- // |resource_uv_size| represents the range of UV coordinates that map to the
- // content being drawn. Typically, we draw to the entire texture, so these
- // coordinates are (1.0f, 1.0f). However, if we are rasterizing to an
- // over-large texture, this size will be smaller, mapping to the subset of the
- // texture being used.
- gfx::SizeF requested_tile_size =
- gfx::SizeF(iter->tiling()->tiling_data()->tiling_size());
- DCHECK_LE(requested_tile_size.width(), draw_info.resource_size().width());
- DCHECK_LE(requested_tile_size.height(), draw_info.resource_size().height());
- *resource_uv_size = gfx::SizeF(
- requested_tile_size.width() / draw_info.resource_size().width(),
- requested_tile_size.height() / draw_info.resource_size().height());
- }
- void PictureLayerImpl::SetNearestNeighbor(bool nearest_neighbor) {
- if (nearest_neighbor_ == nearest_neighbor)
- return;
- nearest_neighbor_ = nearest_neighbor;
- NoteLayerPropertyChanged();
- }
- void PictureLayerImpl::SetDirectlyCompositedImageDefaultRasterScale(
- const gfx::Vector2dF& scale) {
- SetDirectlyCompositedImageDefaultRasterScale(GetPreferredRasterScale(scale));
- }
- void PictureLayerImpl::SetDirectlyCompositedImageDefaultRasterScale(
- float scale) {
- DCHECK_GE(scale, 0.f);
- if (directly_composited_image_default_raster_scale_ == scale)
- return;
- directly_composited_image_default_raster_scale_ = scale;
- directly_composited_image_default_raster_scale_changed_ = true;
- NoteLayerPropertyChanged();
- }
- bool PictureLayerImpl::ShouldDirectlyCompositeImage(float raster_scale) const {
- // Even if there are minor rendering differences, we want to apply directly
- // compositing images in cases where doing so is going to save memory.
- if (raster_scale < 0.1f)
- return true;
- // If the results of scaling the bounds by the expected raster scale
- // would end up with a content rect whose width/height are more than one
- // pixel different from the layer bounds, don't directly composite the image
- // to avoid incorrect rendering.
- gfx::SizeF layer_bounds(bounds());
- gfx::RectF scaled_bounds_rect(layer_bounds);
- scaled_bounds_rect.Scale(raster_scale);
- // Take the scaled bounds, get the enclosing rect then scale it back down -
- // this is the same set of operations that will happen when using the tiling
- // at that raster scale.
- gfx::RectF content_rect(gfx::ToEnclosingRect(scaled_bounds_rect));
- content_rect.Scale(1 / raster_scale);
- return std::abs(layer_bounds.width() - content_rect.width()) < 1.f &&
- std::abs(layer_bounds.height() - content_rect.height()) < 1.f;
- }
- float PictureLayerImpl::CalculateDirectlyCompositedImageRasterScale() const {
- DCHECK(IsDirectlyCompositedImage());
- // If the default raster scale didn't change, we will calculate based on the
- // previous raster source scale. The calculation may change based on updated
- // ideal source scale.
- float adjusted_raster_scale =
- directly_composited_image_default_raster_scale_changed_
- ? directly_composited_image_default_raster_scale_
- : raster_source_scale_key();
- // We never want a raster scale larger than the default, since that uses more
- // memory but can't result it better quality (upscaling will happen in the
- // display compositor instead).
- float max_scale = std::max(directly_composited_image_default_raster_scale_,
- MinimumContentsScale());
- float min_scale = MinimumContentsScale();
- float clamped_ideal_source_scale =
- base::clamp(ideal_source_scale_key(), min_scale, max_scale);
- // Use clamped_ideal_source_scale if adjusted_raster_scale is too far away.
- constexpr float kFarAwayFactor = 32.f;
- if (adjusted_raster_scale < clamped_ideal_source_scale / kFarAwayFactor) {
- adjusted_raster_scale = clamped_ideal_source_scale;
- } else if (adjusted_raster_scale >
- clamped_ideal_source_scale * kFarAwayFactor) {
- adjusted_raster_scale = clamped_ideal_source_scale;
- } else {
- while (adjusted_raster_scale < clamped_ideal_source_scale)
- adjusted_raster_scale *= 2.f;
- // Make sure the adjusted scale is not more than 2x away from the ideal
- // scale in order to save memory. Note that ShouldAdjustRasterScale() uses
- // factor 4 to determine when the scale needs to be updated. This means that
- // the layer may need to be re-rasterized if scale is increased by factor
- // of 2, but not again when it's scaled back to the original size.
- while (adjusted_raster_scale >= 2 * clamped_ideal_source_scale)
- adjusted_raster_scale /= 2.f;
- }
- adjusted_raster_scale =
- base::clamp(adjusted_raster_scale, min_scale, max_scale);
- return adjusted_raster_scale;
- }
- PictureLayerTiling* PictureLayerImpl::AddTiling(
- const gfx::AxisTransform2d& raster_transform) {
- DCHECK(CanHaveTilings());
- DCHECK_GE(raster_transform.scale().x(), MinimumContentsScale());
- DCHECK_GE(raster_transform.scale().y(), MinimumContentsScale());
- DCHECK_LE(raster_transform.scale().x(), MaximumContentsScale());
- DCHECK_LE(raster_transform.scale().y(), MaximumContentsScale());
- DCHECK(raster_source_->HasRecordings());
- bool tiling_can_use_lcd_text =
- can_use_lcd_text() && raster_transform.scale() == raster_contents_scale_;
- return tilings_->AddTiling(raster_transform, raster_source_,
- tiling_can_use_lcd_text);
- }
- void PictureLayerImpl::RemoveAllTilings() {
- tilings_->RemoveAllTilings();
- // If there are no tilings, then raster scales are no longer meaningful.
- ResetRasterScale();
- }
- bool PictureLayerImpl::CanRecreateHighResTilingForLCDTextAndRasterTransform(
- const PictureLayerTiling& high_res) const {
- // We can recreate the tiling if we would invalidate all of its tiles.
- if (high_res.may_contain_low_resolution_tiles())
- return true;
- // Keep the non-ideal raster translation unchanged for transform animations
- // to avoid re-rasterization during animation.
- if (draw_properties().screen_space_transform_is_animating ||
- AffectedByWillChangeTransformHint())
- return false;
- // Also avoid re-rasterization during pinch-zoom.
- if (layer_tree_impl()->PinchGestureActive())
- return false;
- // Keep the current LCD text and raster translation if there is no text and
- // the raster scale is ideal.
- if (lcd_text_disallowed_reason_ == LCDTextDisallowedReason::kNoText &&
- high_res.raster_transform().scale() == raster_contents_scale_)
- return false;
- // If ReadyToActivate() is already scheduled, recreating tiling should be
- // delayed until the activation is executed. Otherwise the tiles in viewport
- // will be deleted.
- if (layer_tree_impl()->IsSyncTree() && layer_tree_impl()->IsReadyToActivate())
- return false;
- // To reduce memory usage, don't recreate highres tiling during scroll
- if (ScrollInteractionInProgress())
- return false;
- return true;
- }
- void PictureLayerImpl::UpdateTilingsForRasterScaleAndTranslation(
- bool has_adjusted_raster_scale) {
- PictureLayerTiling* high_res =
- tilings_->FindTilingWithScaleKey(raster_contents_scale_key());
- gfx::Vector2dF raster_translation;
- bool raster_translation_aligns_pixels =
- CalculateRasterTranslation(raster_translation);
- UpdateCanUseLCDText(raster_translation_aligns_pixels);
- if (high_res) {
- bool raster_transform_is_not_ideal =
- high_res->raster_transform().scale() != raster_contents_scale_ ||
- high_res->raster_transform().translation() != raster_translation;
- bool can_use_lcd_text_changed =
- high_res->can_use_lcd_text() != can_use_lcd_text();
- bool can_recreate_highres_tiling =
- CanRecreateHighResTilingForLCDTextAndRasterTransform(*high_res);
- // Only for the sync tree to avoid flickering.
- bool should_recreate_high_res =
- (raster_transform_is_not_ideal || can_use_lcd_text_changed) &&
- layer_tree_impl()->IsSyncTree() && can_recreate_highres_tiling;
- // Only request an invalidation if we don't already have a pending tree.
- bool can_request_invalidation_for_high_res =
- (raster_transform_is_not_ideal || can_use_lcd_text_changed) &&
- !layer_tree_impl()->settings().commit_to_active_tree &&
- layer_tree_impl()->IsActiveTree() && can_recreate_highres_tiling &&
- !layer_tree_impl()->HasPendingTree();
- if (should_recreate_high_res) {
- tilings_->Remove(high_res);
- high_res = nullptr;
- } else if (can_request_invalidation_for_high_res) {
- // Anytime a condition which flips whether we can recreate the tiling
- // changes, we'll get a call to UpdateDrawProperties. We check whether we
- // could recreate the tiling when this runs on the active tree to trigger
- // an impl-side invalidation (if needed).
- layer_tree_impl()->RequestImplSideInvalidationForRerasterTiling();
- } else if (!has_adjusted_raster_scale) {
- // Nothing changed, no need to update tilings.
- DCHECK_EQ(HIGH_RESOLUTION, high_res->resolution());
- SanityCheckTilingState();
- return;
- }
- }
- // Reset all resolution enums on tilings, we'll be setting new values in this
- // function.
- tilings_->MarkAllTilingsNonIdeal();
- if (!high_res) {
- // We always need a high res tiling, so create one if it doesn't exist.
- high_res = AddTiling(
- gfx::AxisTransform2d(raster_contents_scale_, raster_translation));
- } else if (high_res->may_contain_low_resolution_tiles()) {
- // If the tiling we find here was LOW_RESOLUTION previously, it may not be
- // fully rastered, so destroy the old tiles.
- high_res->Reset();
- // Reset the flag now that we'll make it high res, it will have fully
- // rastered content.
- high_res->reset_may_contain_low_resolution_tiles();
- }
- high_res->set_resolution(HIGH_RESOLUTION);
- if (layer_tree_impl()->IsPendingTree() ||
- (layer_tree_impl()->settings().commit_to_active_tree &&
- IsDirectlyCompositedImage())) {
- // On the pending tree, drop any tilings that are non-ideal since we don't
- // need them to activate anyway.
- // For DirectlyCompositedImages, if we recomputed a new raster scale, we
- // should drop the non-ideal ones if we're committing to the active tree.
- // Otherwise a non-ideal scale that is _larger_ than the HIGH_RESOLUTION
- // tile will be used as the coverage scale, and we'll produce a slightly
- // different rendering. We don't drop the tilings on the active tree if
- // we're not committing to the active tree to prevent checkerboarding.
- tilings_->RemoveNonIdealTilings();
- }
- SanityCheckTilingState();
- }
- bool PictureLayerImpl::ShouldAdjustRasterScale() const {
- if (!raster_contents_scale_.x() || !raster_contents_scale_.y())
- return true;
- // Adjust raster scale if the raster source size changed. This is mainly to
- // reset the preserved scale for will-change:transform but may also help in
- // other cases, which won't affect performance much because the change has
- // involved the main thread and/or we'll (at least partly) re-raster anyway.
- if (raster_source_size_changed_)
- return true;
- if (IsDirectlyCompositedImage()) {
- // If the default raster scale changed, that means the bounds or image size
- // changed. We should recalculate in order to raster at the intrinsic image
- // size. Note that this is not a comparison of the used raster_source_scale_
- // and desired because of the adjustments in RecalculateRasterScales.
- if (directly_composited_image_default_raster_scale_changed_)
- return true;
- // First check to see if we need to adjust based on ideal_source_scale_
- // changing (i.e. scale transform has been modified). These limits exist
- // so that we don't raster at the intrinsic image size if the layer will
- // be scaled down more than 4x ideal. This saves memory without sacrificing
- // noticeable quality. We'll also bump the scale back up in the case where
- // the ideal scale is increased.
- float max_scale = std::max(directly_composited_image_default_raster_scale_,
- MinimumContentsScale());
- if (raster_source_scale_key() <
- std::min(ideal_source_scale_key(), max_scale))
- return true;
- if (raster_source_scale_key() > 4 * ideal_source_scale_key())
- return true;
- return false;
- }
- if (was_screen_space_transform_animating_ !=
- draw_properties().screen_space_transform_is_animating) {
- // Skip adjusting raster scale when animations finish if we have a
- // will-change: transform hint to preserve maximum resolution tiles
- // needed.
- if (draw_properties().screen_space_transform_is_animating ||
- !AffectedByWillChangeTransformHint())
- return true;
- }
- bool is_pinching = layer_tree_impl()->PinchGestureActive();
- if (is_pinching && raster_page_scale_) {
- // We change our raster scale when it is:
- // - Higher than ideal (need a lower-res tiling available)
- // - Too far from ideal (need a higher-res tiling available)
- float ratio = ideal_page_scale_ / raster_page_scale_;
- if (raster_page_scale_ > ideal_page_scale_ ||
- ratio > kMaxScaleRatioDuringPinch)
- return true;
- }
- if (!is_pinching) {
- // When not pinching, match the ideal page scale factor.
- if (raster_page_scale_ != ideal_page_scale_)
- return true;
- }
- // Always match the ideal device scale factor.
- if (raster_device_scale_ != ideal_device_scale_)
- return true;
- float max_scale = MaximumContentsScale();
- if (raster_contents_scale_.x() > max_scale ||
- raster_contents_scale_.y() > max_scale)
- return true;
- float min_scale = MinimumContentsScale();
- if (raster_contents_scale_.x() < min_scale ||
- raster_contents_scale_.y() < min_scale)
- return true;
- // Avoid frequent raster scale changes if we have an animating transform.
- if (draw_properties().screen_space_transform_is_animating) {
- // Except when the device viewport rect has changed because the raster scale
- // may depend on the rect.
- if (layer_tree_impl()->device_viewport_rect_changed()) {
- return true;
- }
- // Or when the raster scale is not affected by invalid scale and is too
- // small compared to the ideal scale.
- if (ideal_contents_scale_.x() >
- raster_contents_scale_.x() *
- kRatioToAdjustRasterScaleForTransformAnimation ||
- ideal_contents_scale_.y() >
- raster_contents_scale_.y() *
- kRatioToAdjustRasterScaleForTransformAnimation) {
- auto* property_trees = layer_tree_impl()->property_trees();
- int transform_id = transform_tree_index();
- if (property_trees->AnimationScaleCacheIsInvalid(transform_id) ||
- !property_trees->AnimationAffectedByInvalidScale(transform_id)) {
- return true;
- }
- }
- return false;
- }
- // Don't change the raster scale if the raster scale is already ideal.
- if (raster_source_scale_ == ideal_source_scale_)
- return false;
- // Don't update will-change: transform layers if the raster contents scale is
- // bigger than the minimum scale.
- if (AffectedByWillChangeTransformHint()) {
- float min_raster_scale = MinimumRasterContentsScaleForWillChangeTransform();
- if (raster_contents_scale_.x() >= min_raster_scale &&
- raster_contents_scale_.y() >= min_raster_scale)
- return false;
- }
- // Match the raster scale in all other cases.
- return true;
- }
- void PictureLayerImpl::AddLowResolutionTilingIfNeeded() {
- DCHECK(layer_tree_impl()->IsActiveTree());
- if (!layer_tree_impl()->create_low_res_tiling())
- return;
- // We should have a high resolution tiling at raster_contents_scale, so if the
- // low res one is the same then we shouldn't try to override this tiling by
- // marking it as a low res.
- if (raster_contents_scale_key() == low_res_raster_contents_scale_)
- return;
- PictureLayerTiling* low_res =
- tilings_->FindTilingWithScaleKey(low_res_raster_contents_scale_);
- DCHECK(!low_res || low_res->resolution() != HIGH_RESOLUTION);
- // Only create new low res tilings when the transform is static. This
- // prevents wastefully creating a paired low res tiling for every new high
- // res tiling during a pinch or a CSS animation.
- bool is_pinching = layer_tree_impl()->PinchGestureActive();
- bool is_animating = draw_properties().screen_space_transform_is_animating;
- if (!is_pinching && !is_animating) {
- if (!low_res)
- low_res = AddTiling(gfx::AxisTransform2d(low_res_raster_contents_scale_,
- gfx::Vector2dF()));
- low_res->set_resolution(LOW_RESOLUTION);
- }
- }
- void PictureLayerImpl::RecalculateRasterScales() {
- if (IsDirectlyCompositedImage()) {
- // TODO(crbug.com/1196414): Support 2D scales in directly composited images.
- float used_raster_scale = CalculateDirectlyCompositedImageRasterScale();
- directly_composited_image_default_raster_scale_changed_ = false;
- if (ShouldDirectlyCompositeImage(used_raster_scale)) {
- raster_source_scale_ =
- gfx::Vector2dF(used_raster_scale, used_raster_scale);
- raster_page_scale_ = 1.f;
- raster_device_scale_ = 1.f;
- raster_contents_scale_ = raster_source_scale_;
- low_res_raster_contents_scale_ = used_raster_scale;
- return;
- }
- // If we should not directly composite this image, reset values and fall
- // back to normal raster scale calculations below.
- directly_composited_image_default_raster_scale_ = 0.f;
- }
- gfx::Vector2dF old_raster_contents_scale = raster_contents_scale_;
- float old_raster_page_scale = raster_page_scale_;
- // The raster scale if previous tilings should be preserved.
- gfx::Vector2dF preserved_raster_contents_scale = old_raster_contents_scale;
- raster_device_scale_ = ideal_device_scale_;
- raster_page_scale_ = ideal_page_scale_;
- raster_source_scale_ = ideal_source_scale_;
- raster_contents_scale_ = ideal_contents_scale_;
- // During pinch we completely ignore the current ideal scale, and just use
- // a multiple of the previous scale.
- bool is_pinching = layer_tree_impl()->PinchGestureActive();
- if (is_pinching && !old_raster_contents_scale.IsZero()) {
- // See ShouldAdjustRasterScale:
- // - When zooming out, preemptively create new tiling at lower resolution.
- // - When zooming in, approximate ideal using multiple of kMaxScaleRatio.
- bool zooming_out = old_raster_page_scale > ideal_page_scale_;
- float desired_contents_scale =
- std::max(old_raster_contents_scale.x(), old_raster_contents_scale.y());
- float ideal_scale = ideal_contents_scale_key();
- if (zooming_out) {
- while (desired_contents_scale > ideal_scale)
- desired_contents_scale /= kMaxScaleRatioDuringPinch;
- } else {
- while (desired_contents_scale < ideal_scale)
- desired_contents_scale *= kMaxScaleRatioDuringPinch;
- }
- if (const auto* snapped_to_tiling = tilings_->FindTilingWithNearestScaleKey(
- desired_contents_scale, kSnapToExistingTilingRatio)) {
- raster_contents_scale_ = snapped_to_tiling->raster_transform().scale();
- } else {
- raster_contents_scale_ = old_raster_contents_scale;
- raster_contents_scale_.Scale(desired_contents_scale /
- raster_contents_scale_key());
- }
- preserved_raster_contents_scale = raster_contents_scale_;
- raster_page_scale_ =
- std::max(raster_contents_scale_.x() / raster_source_scale_.x(),
- raster_contents_scale_.y() / raster_source_scale_.y()) /
- raster_device_scale_;
- }
- if (draw_properties().screen_space_transform_is_animating)
- AdjustRasterScaleForTransformAnimation(preserved_raster_contents_scale);
- if (AffectedByWillChangeTransformHint()) {
- float min_scale = MinimumRasterContentsScaleForWillChangeTransform();
- raster_contents_scale_.SetToMax(gfx::Vector2dF(min_scale, min_scale));
- }
- float min_scale = MinimumContentsScale();
- float max_scale = MaximumContentsScale();
- raster_contents_scale_.SetToMax(gfx::Vector2dF(min_scale, min_scale));
- raster_contents_scale_.SetToMin(gfx::Vector2dF(max_scale, max_scale));
- DCHECK_GE(raster_contents_scale_.x(), min_scale);
- DCHECK_GE(raster_contents_scale_.y(), min_scale);
- DCHECK_LE(raster_contents_scale_.x(), max_scale);
- DCHECK_LE(raster_contents_scale_.y(), max_scale);
- // If this layer would create zero or one tiles at this content scale,
- // don't create a low res tiling.
- gfx::Size raster_bounds = gfx::ScaleToCeiledSize(raster_source_->GetSize(),
- raster_contents_scale_.x(),
- raster_contents_scale_.y());
- gfx::Size tile_size = CalculateTileSize(raster_bounds);
- bool tile_covers_bounds = tile_size.width() >= raster_bounds.width() &&
- tile_size.height() >= raster_bounds.height();
- if (tile_size.IsEmpty() || tile_covers_bounds) {
- low_res_raster_contents_scale_ = raster_contents_scale_key();
- return;
- }
- float low_res_factor =
- layer_tree_impl()->settings().low_res_contents_scale_factor;
- low_res_raster_contents_scale_ =
- std::max(raster_contents_scale_key() * low_res_factor, min_scale);
- DCHECK_LE(low_res_raster_contents_scale_, raster_contents_scale_key());
- DCHECK_GE(low_res_raster_contents_scale_, min_scale);
- DCHECK_LE(low_res_raster_contents_scale_, max_scale);
- }
- void PictureLayerImpl::AdjustRasterScaleForTransformAnimation(
- const gfx::Vector2dF& preserved_raster_contents_scale) {
- DCHECK(draw_properties().screen_space_transform_is_animating);
- float maximum_animation_scale =
- layer_tree_impl()->property_trees()->MaximumAnimationToScreenScale(
- transform_tree_index());
- raster_contents_scale_.SetToMax(
- gfx::Vector2dF(maximum_animation_scale, maximum_animation_scale));
- if (AffectedByWillChangeTransformHint()) {
- // If we have a will-change: transform hint, do not shrink the content
- // raster scale, otherwise we will end up throwing away larger tiles we may
- // need again.
- raster_contents_scale_.SetToMax(preserved_raster_contents_scale);
- }
- // However we want to avoid excessive memory use. Choose a scale at which this
- // layer's rastered content is not larger than the viewport.
- gfx::Size viewport = layer_tree_impl()->GetDeviceViewport().size();
- // To avoid too small scale in a small viewport.
- constexpr int kMinViewportDimension = 500;
- float max_viewport_dimension =
- std::max({viewport.width(), viewport.height(), kMinViewportDimension});
- DCHECK(max_viewport_dimension);
- // Use square to compensate for viewports with different aspect ratios.
- float squared_viewport_area = max_viewport_dimension * max_viewport_dimension;
- gfx::SizeF raster_source_size(raster_source_->GetSize());
- // Clamp raster_source_size by max_viewport_dimension to avoid too small
- // scale for huge layers for which the far from viewport area won't be
- // rasterized and out of viewport area is rasterized in low priority.
- gfx::SizeF max_visible_bounds(
- std::min(raster_source_size.width(), max_viewport_dimension),
- std::min(raster_source_size.height(), max_viewport_dimension));
- gfx::SizeF max_visible_bounds_at_max_scale =
- gfx::ScaleSize(max_visible_bounds, raster_contents_scale_.x(),
- raster_contents_scale_.y());
- float maximum_area = max_visible_bounds_at_max_scale.width() *
- max_visible_bounds_at_max_scale.height();
- // Clamp the scale to make the rastered content not larger than the viewport.
- if (UNLIKELY(maximum_area > squared_viewport_area)) {
- raster_contents_scale_.Scale(
- 1.f / std::sqrt(maximum_area / squared_viewport_area));
- }
- }
- void PictureLayerImpl::CleanUpTilingsOnActiveLayer(
- const std::vector<PictureLayerTiling*>& used_tilings) {
- DCHECK(layer_tree_impl()->IsActiveTree());
- if (tilings_->num_tilings() == 0)
- return;
- float min_acceptable_high_res_scale =
- std::min(raster_contents_scale_key(), ideal_contents_scale_key());
- float max_acceptable_high_res_scale =
- std::max(raster_contents_scale_key(), ideal_contents_scale_key());
- PictureLayerImpl* twin = GetPendingOrActiveTwinLayer();
- if (twin && twin->CanHaveTilings()) {
- min_acceptable_high_res_scale = std::min(
- {min_acceptable_high_res_scale, twin->raster_contents_scale_key(),
- twin->ideal_contents_scale_key()});
- max_acceptable_high_res_scale = std::max(
- {max_acceptable_high_res_scale, twin->raster_contents_scale_key(),
- twin->ideal_contents_scale_key()});
- }
- PictureLayerTilingSet* twin_set = twin ? twin->tilings_.get() : nullptr;
- tilings_->CleanUpTilings(min_acceptable_high_res_scale,
- max_acceptable_high_res_scale, used_tilings,
- twin_set);
- }
- float PictureLayerImpl::MinimumRasterContentsScaleForWillChangeTransform()
- const {
- DCHECK(AffectedByWillChangeTransformHint());
- float native_scale = ideal_device_scale_ * ideal_page_scale_;
- float ideal_scale = ideal_contents_scale_key();
- // Clamp will-change: transform layers to be at least the native scale,
- // unless the scale is too small to avoid too many tiles using too much tile
- // memory.
- if (ideal_scale < native_scale * kMinScaleRatioForWillChangeTransform) {
- // Don't let the scale too small compared to the ideal scale.
- return ideal_scale * kMinScaleRatioForWillChangeTransform;
- }
- return native_scale;
- }
- bool PictureLayerImpl::CalculateRasterTranslation(
- gfx::Vector2dF& raster_translation) const {
- // If this setting is set, the client (e.g. the Chromium UI) is sure that it
- // can almost always align raster pixels to physical pixels, and doesn't care
- // about temporary misalignment, so don't bother raster translation.
- if (layer_tree_impl()->settings().layers_always_allowed_lcd_text)
- return true;
- // No need to use raster translation if there is no text.
- if (!raster_source_ || !raster_source_->GetDisplayItemList() ||
- !raster_source_->GetDisplayItemList()->has_draw_text_ops()) {
- return false;
- }
- const gfx::Transform& screen_transform = ScreenSpaceTransform();
- gfx::Transform draw_transform = DrawTransform();
- if (!screen_transform.IsScaleOrTranslation() ||
- !draw_transform.IsScaleOrTranslation()) {
- return false;
- }
- // It is only useful to align the content space to the target space if their
- // relative pixel ratio is some small rational number. Currently we only
- // align if the relative pixel ratio is 1:1 (i.e. the scale components of
- // both the screen transform and the draw transform are approximately the same
- // as |raster_contents_scale_|). Good match if the maximum alignment error on
- // a layer of size 10000px does not exceed 0.001px.
- static constexpr float kPixelErrorThreshold = 0.001f;
- static constexpr float kScaleErrorThreshold = kPixelErrorThreshold / 10000;
- auto is_raster_scale = [this](const gfx::Transform& transform) -> bool {
- // The matrix has the X scale at (0,0), and the Y scale at (1,1).
- return std::abs(transform.matrix().rc(0, 0) - raster_contents_scale_.x()) <=
- kScaleErrorThreshold &&
- std::abs(transform.matrix().rc(1, 1) - raster_contents_scale_.y()) <=
- kScaleErrorThreshold;
- };
- if (!is_raster_scale(screen_transform) || !is_raster_scale(draw_transform))
- return false;
- // Extract the fractional part of layer origin in the screen space and in the
- // target space.
- auto fraction = [](float f) -> float { return f - floorf(f); };
- float screen_x_fraction = fraction(screen_transform.matrix().rc(0, 3));
- float screen_y_fraction = fraction(screen_transform.matrix().rc(1, 3));
- float target_x_fraction = fraction(draw_transform.matrix().rc(0, 3));
- float target_y_fraction = fraction(draw_transform.matrix().rc(1, 3));
- // If the origin is different in the screen space and in the target space,
- // it means the render target is not aligned to physical pixels, and the
- // text content will be blurry regardless of raster translation.
- if (std::abs(screen_x_fraction - target_x_fraction) > kPixelErrorThreshold ||
- std::abs(screen_y_fraction - target_y_fraction) > kPixelErrorThreshold) {
- return false;
- }
- raster_translation = gfx::Vector2dF(target_x_fraction, target_y_fraction);
- return true;
- }
- float PictureLayerImpl::MinimumContentsScale() const {
- // If the contents scale is less than 1 / width (also for height),
- // then it will end up having less than one pixel of content in that
- // dimension. Bump the minimum contents scale up in this case to prevent
- // this from happening.
- int min_dimension = std::min(raster_source_->GetSize().width(),
- raster_source_->GetSize().height());
- return min_dimension ? 1.f / min_dimension : 1.f;
- }
- float PictureLayerImpl::MaximumContentsScale() const {
- if (bounds().IsEmpty())
- return 0;
- // When mask tiling is disabled or the mask is single textured, masks can not
- // have tilings that would become larger than the max_texture_size since they
- // use a single tile for the entire tiling. Other layers can have tilings such
- // that dimension * scale does not overflow.
- float max_dimension = static_cast<float>(
- is_backdrop_filter_mask_ ? layer_tree_impl()->max_texture_size()
- : std::numeric_limits<int>::max());
- int higher_dimension = std::max(bounds().width(), bounds().height());
- float max_scale = max_dimension / higher_dimension;
- // We require that multiplying the layer size by the contents scale and
- // ceiling produces a value <= |max_dimension|. Because for large layer
- // sizes floating point ambiguity may crop up, making the result larger or
- // smaller than expected, we use a slightly smaller floating point value for
- // the scale, to help ensure that the resulting content bounds will never end
- // up larger than |max_dimension|.
- return nextafterf(max_scale, 0.f);
- }
- void PictureLayerImpl::ResetRasterScale() {
- raster_page_scale_ = 0.f;
- raster_device_scale_ = 0.f;
- raster_source_scale_ = gfx::Vector2dF(0.f, 0.f);
- raster_contents_scale_ = gfx::Vector2dF(0.f, 0.f);
- low_res_raster_contents_scale_ = 0.f;
- directly_composited_image_default_raster_scale_ = 0.f;
- }
- bool PictureLayerImpl::CanHaveTilings() const {
- if (!raster_source_)
- return false;
- if (raster_source_->IsSolidColor())
- return false;
- if (!draws_content())
- return false;
- if (!raster_source_->HasRecordings())
- return false;
- // If the |raster_source_| has a recording it should have non-empty bounds.
- DCHECK(!raster_source_->GetSize().IsEmpty());
- if (MaximumContentsScale() < MinimumContentsScale())
- return false;
- return true;
- }
- void PictureLayerImpl::SanityCheckTilingState() const {
- #if DCHECK_IS_ON()
- if (!CanHaveTilings()) {
- DCHECK_EQ(0u, tilings_->num_tilings());
- return;
- }
- if (tilings_->num_tilings() == 0)
- return;
- // We should only have one high res tiling.
- DCHECK_EQ(1, tilings_->NumHighResTilings());
- #endif
- }
- float PictureLayerImpl::MaximumTilingContentsScale() const {
- float max_contents_scale = tilings_->GetMaximumContentsScale();
- return std::max(max_contents_scale, MinimumContentsScale());
- }
- std::unique_ptr<PictureLayerTilingSet>
- PictureLayerImpl::CreatePictureLayerTilingSet() {
- const LayerTreeSettings& settings = layer_tree_impl()->settings();
- return PictureLayerTilingSet::Create(
- IsActive() ? ACTIVE_TREE : PENDING_TREE, this,
- settings.tiling_interest_area_padding,
- layer_tree_impl()->use_gpu_rasterization()
- ? settings.gpu_rasterization_skewport_target_time_in_seconds
- : settings.skewport_target_time_in_seconds,
- settings.skewport_extrapolation_limit_in_screen_pixels,
- settings.max_preraster_distance_in_screen_pixels);
- }
- void PictureLayerImpl::UpdateIdealScales() {
- DCHECK(CanHaveTilings());
- float min_contents_scale = MinimumContentsScale();
- DCHECK_GT(min_contents_scale, 0.f);
- ideal_device_scale_ = layer_tree_impl()->device_scale_factor();
- ideal_page_scale_ = 1.f;
- ideal_contents_scale_ = GetIdealContentsScale();
- if (layer_tree_impl()->PageScaleTransformNode()) {
- DCHECK(layer_tree_impl()->settings().is_for_scalable_page);
- ideal_page_scale_ = IsAffectedByPageScale()
- ? layer_tree_impl()->current_page_scale_factor()
- : 1.f;
- }
- // This layer may be in a layer tree embedded in a hierarchy that has its own
- // page scale factor. We represent that here as 'external_page_scale_factor',
- // a value that affects raster scale in the same way that page_scale_factor
- // does, but doesn't affect any geometry calculations. In a normal main frame,
- // fenced frame, or OOPIF, only one of current or external page scale factor
- // is ever used but not both. The only exception to this is a main frame in a
- // portal or a guest view. In these cases we may have a
- // current_page_scale_factor (e.g. due to a viewport <meta> tag) as well as an
- // external_page_scale_factor coming from the page scale of its embedder page.
- float external_page_scale_factor =
- layer_tree_impl() ? layer_tree_impl()->external_page_scale_factor() : 1.f;
- DCHECK(!layer_tree_impl() ||
- layer_tree_impl()->settings().is_for_scalable_page ||
- external_page_scale_factor == 1.f ||
- layer_tree_impl()->current_page_scale_factor() == 1.f);
- ideal_page_scale_ *= external_page_scale_factor;
- ideal_contents_scale_.Scale(external_page_scale_factor);
- ideal_contents_scale_.SetToMax(
- gfx::Vector2dF(min_contents_scale, min_contents_scale));
- ideal_contents_scale_.SetToMin(
- gfx::Vector2dF(kMaxIdealContentsScale, kMaxIdealContentsScale));
- ideal_source_scale_ = {ideal_contents_scale_.x() / ideal_page_scale_,
- ideal_contents_scale_.y() / ideal_page_scale_};
- }
- void PictureLayerImpl::GetDebugBorderProperties(SkColor4f* color,
- float* width) const {
- float device_scale_factor =
- layer_tree_impl() ? layer_tree_impl()->device_scale_factor() : 1;
- if (IsDirectlyCompositedImage()) {
- *color = DebugColors::ImageLayerBorderColor();
- *width = DebugColors::ImageLayerBorderWidth(device_scale_factor);
- } else {
- *color = DebugColors::TiledContentLayerBorderColor();
- *width = DebugColors::TiledContentLayerBorderWidth(device_scale_factor);
- }
- }
- void PictureLayerImpl::GetAllPrioritizedTilesForTracing(
- std::vector<PrioritizedTile>* prioritized_tiles) const {
- if (!tilings_)
- return;
- tilings_->GetAllPrioritizedTilesForTracing(prioritized_tiles);
- }
- void PictureLayerImpl::AsValueInto(
- base::trace_event::TracedValue* state) const {
- LayerImpl::AsValueInto(state);
- state->SetDouble("ideal_contents_scale", ideal_contents_scale_key());
- state->SetDouble("geometry_contents_scale", MaximumTilingContentsScale());
- state->BeginArray("tilings");
- tilings_->AsValueInto(state);
- state->EndArray();
- MathUtil::AddToTracedValue("tile_priority_rect",
- viewport_rect_for_tile_priority_in_content_space_,
- state);
- MathUtil::AddToTracedValue("visible_rect", visible_layer_rect(), state);
- state->SetString(
- "lcd_text_disallowed_reason",
- LCDTextDisallowedReasonToString(lcd_text_disallowed_reason_));
- state->BeginArray("pictures");
- raster_source_->AsValueInto(state);
- state->EndArray();
- state->BeginArray("invalidation");
- invalidation_.AsValueInto(state);
- state->EndArray();
- state->BeginArray("coverage_tiles");
- for (PictureLayerTilingSet::CoverageIterator iter(
- tilings_.get(), MaximumTilingContentsScale(),
- gfx::Rect(raster_source_->GetSize()), ideal_contents_scale_key());
- iter; ++iter) {
- state->BeginDictionary();
- MathUtil::AddToTracedValue("geometry_rect", iter.geometry_rect(), state);
- if (*iter)
- viz::TracedValue::SetIDRef(*iter, state, "tile");
- state->EndDictionary();
- }
- state->EndArray();
- state->BeginDictionary("can_have_tilings_state");
- state->SetBoolean("can_have_tilings", CanHaveTilings());
- state->SetBoolean("raster_source_solid_color",
- raster_source_->IsSolidColor());
- state->SetBoolean("draws_content", draws_content());
- state->SetBoolean("raster_source_has_recordings",
- raster_source_->HasRecordings());
- state->SetDouble("max_contents_scale", MaximumTilingContentsScale());
- state->SetDouble("min_contents_scale", MinimumContentsScale());
- state->EndDictionary();
- state->BeginDictionary("raster_scales");
- state->SetDouble("page_scale", raster_page_scale_);
- state->SetDouble("device_scale", raster_device_scale_);
- state->BeginArray("source_scale");
- state->AppendDouble(raster_source_scale_.x());
- state->AppendDouble(raster_source_scale_.y());
- state->EndArray();
- state->BeginArray("contents_scale");
- state->AppendDouble(raster_contents_scale_.x());
- state->AppendDouble(raster_contents_scale_.y());
- state->EndArray();
- state->SetDouble("low_res_contents_scale", low_res_raster_contents_scale_);
- state->EndDictionary();
- state->BeginDictionary("ideal_scales");
- state->SetDouble("page_scale", ideal_page_scale_);
- state->SetDouble("device_scale", ideal_device_scale_);
- state->BeginArray("source_scale");
- state->AppendDouble(ideal_source_scale_.x());
- state->AppendDouble(ideal_source_scale_.y());
- state->EndArray();
- state->BeginArray("contents_scale");
- state->AppendDouble(ideal_contents_scale_.x());
- state->AppendDouble(ideal_contents_scale_.y());
- state->EndArray();
- state->EndDictionary();
- }
- size_t PictureLayerImpl::GPUMemoryUsageInBytes() const {
- return tilings_->GPUMemoryUsageInBytes();
- }
- void PictureLayerImpl::RunMicroBenchmark(MicroBenchmarkImpl* benchmark) {
- benchmark->RunOnLayer(this);
- }
- bool PictureLayerImpl::IsOnActiveOrPendingTree() const {
- return !layer_tree_impl()->IsRecycleTree();
- }
- bool PictureLayerImpl::HasValidTilePriorities() const {
- return IsOnActiveOrPendingTree() &&
- (contributes_to_drawn_render_surface() || raster_even_if_not_drawn());
- }
- PictureLayerImpl::ImageInvalidationResult
- PictureLayerImpl::InvalidateRegionForImages(
- const PaintImageIdFlatSet& images_to_invalidate) {
- if (!raster_source_ || !raster_source_->GetDisplayItemList() ||
- raster_source_->GetDisplayItemList()->discardable_image_map().empty()) {
- return ImageInvalidationResult::kNoImages;
- }
- InvalidationRegion image_invalidation;
- for (auto image_id : images_to_invalidate) {
- const auto& rects = raster_source_->GetDisplayItemList()
- ->discardable_image_map()
- .GetRectsForImage(image_id);
- for (const auto& r : rects.container())
- image_invalidation.Union(r);
- }
- Region invalidation;
- image_invalidation.Swap(&invalidation);
- if (invalidation.IsEmpty())
- return ImageInvalidationResult::kNoInvalidation;
- // Note: We can use a rect here since this is only used to track damage for a
- // frame and not raster invalidation.
- UnionUpdateRect(invalidation.bounds());
- invalidation_.Union(invalidation);
- tilings_->Invalidate(invalidation);
- // TODO(crbug.com/303943): SetNeedsPushProperties() would be needed here if
- // PictureLayerImpl didn't always push properties every activation.
- return ImageInvalidationResult::kInvalidated;
- }
- void PictureLayerImpl::SetPaintWorkletRecord(
- scoped_refptr<const PaintWorkletInput> input,
- sk_sp<PaintRecord> record) {
- DCHECK(paint_worklet_records_.find(input) != paint_worklet_records_.end());
- paint_worklet_records_[input].second = std::move(record);
- }
- void PictureLayerImpl::RegisterAnimatedImages() {
- if (!raster_source_ || !raster_source_->GetDisplayItemList())
- return;
- auto* controller = layer_tree_impl()->image_animation_controller();
- const auto& metadata = raster_source_->GetDisplayItemList()
- ->discardable_image_map()
- .animated_images_metadata();
- for (const auto& data : metadata) {
- // Only update the metadata from updated recordings received from a commit.
- if (layer_tree_impl()->IsSyncTree())
- controller->UpdateAnimatedImage(data);
- controller->RegisterAnimationDriver(data.paint_image_id, this);
- }
- }
- void PictureLayerImpl::UnregisterAnimatedImages() {
- if (!raster_source_ || !raster_source_->GetDisplayItemList())
- return;
- auto* controller = layer_tree_impl()->image_animation_controller();
- const auto& metadata = raster_source_->GetDisplayItemList()
- ->discardable_image_map()
- .animated_images_metadata();
- for (const auto& data : metadata)
- controller->UnregisterAnimationDriver(data.paint_image_id, this);
- }
- void PictureLayerImpl::SetPaintWorkletInputs(
- const std::vector<DiscardableImageMap::PaintWorkletInputWithImageId>&
- inputs) {
- // PaintWorklets are not supported when committing directly to the active
- // tree, so in that case the |inputs| should always be empty.
- DCHECK(layer_tree_impl()->IsPendingTree() || inputs.empty());
- bool had_paint_worklets = !paint_worklet_records_.empty();
- PaintWorkletRecordMap new_records;
- for (const auto& input_with_id : inputs) {
- const auto& input = input_with_id.first;
- const auto& paint_image_id = input_with_id.second;
- auto it = new_records.find(input);
- // We should never have multiple PaintImages sharing the same paint worklet.
- DCHECK(it == new_records.end() || it->second.first == paint_image_id);
- // Attempt to re-use an existing PaintRecord if possible.
- new_records[input] = std::make_pair(
- paint_image_id, std::move(paint_worklet_records_[input].second));
- }
- paint_worklet_records_.swap(new_records);
- // The pending tree tracks which PictureLayerImpls have PaintWorkletInputs as
- // an optimization to avoid walking all picture layers.
- bool has_paint_worklets = !paint_worklet_records_.empty();
- if ((has_paint_worklets != had_paint_worklets) &&
- layer_tree_impl()->IsPendingTree()) {
- // TODO(xidachen): We don't need additional tracking on LayerTreeImpl. The
- // tracking in AnimatedPaintWorkletTracker should be enough.
- layer_tree_impl()->NotifyLayerHasPaintWorkletsChanged(this,
- has_paint_worklets);
- }
- if (layer_tree_impl()->IsPendingTree()) {
- layer_tree_impl()
- ->paint_worklet_tracker()
- .UpdatePaintWorkletInputProperties(inputs, this);
- }
- }
- void PictureLayerImpl::InvalidatePaintWorklets(
- const PaintWorkletInput::PropertyKey& key) {
- for (auto& entry : paint_worklet_records_) {
- const std::vector<PaintWorkletInput::PropertyKey>& prop_ids =
- entry.first->GetPropertyKeys();
- // If the PaintWorklet depends on the property whose value was changed by
- // the animation system, then invalidate its associated PaintRecord so that
- // we can repaint the PaintWorklet during impl side invalidation.
- if (base::Contains(prop_ids, key))
- entry.second.second = nullptr;
- }
- }
- gfx::ContentColorUsage PictureLayerImpl::GetContentColorUsage() const {
- auto display_item_list = raster_source_->GetDisplayItemList();
- if (!display_item_list)
- return gfx::ContentColorUsage::kSRGB;
- return display_item_list->discardable_image_map().content_color_usage();
- }
- } // namespace cc
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