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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/viz/service/display/overlay_candidate_factory.h"
#include <variant>
#include "base/containers/contains.h"
#include "build/build_config.h"
#include "cc/base/math_util.h"
#include "components/viz/common/quads/aggregated_render_pass_draw_quad.h"
#include "components/viz/common/quads/draw_quad.h"
#include "components/viz/common/quads/shared_quad_state.h"
#include "components/viz/common/quads/solid_color_draw_quad.h"
#include "components/viz/common/quads/texture_draw_quad.h"
#include "components/viz/common/quads/tile_draw_quad.h"
#include "components/viz/common/quads/video_hole_draw_quad.h"
#include "components/viz/common/resources/resource_id.h"
#include "components/viz/common/viz_utils.h"
#include "components/viz/service/debugger/viz_debugger.h"
#include "components/viz/service/display/display_resource_provider.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/buffer_format_util.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/rect_conversions.h"
#include "ui/gfx/geometry/rect_f.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/geometry/size_conversions.h"
#include "ui/gfx/overlay_transform_utils.h"
#include "ui/gfx/video_types.h"
namespace viz {
namespace {
const SharedImageFormat kOverlayFormats[] = {
SinglePlaneFormat::kRGBX_8888, SinglePlaneFormat::kRGBA_8888,
SinglePlaneFormat::kBGRX_8888, SinglePlaneFormat::kBGRA_8888,
SinglePlaneFormat::kBGR_565, MultiPlaneFormat::kNV12,
MultiPlaneFormat::kP010};
enum Axis { NONE, AXIS_POS_X, AXIS_NEG_X, AXIS_POS_Y, AXIS_NEG_Y };
Axis VectorToAxis(const gfx::Vector3dF& vec) {
if (!cc::MathUtil::IsWithinEpsilon(vec.z(), 0.f))
return NONE;
const bool x_zero = cc::MathUtil::IsWithinEpsilon(vec.x(), 0.f);
const bool y_zero = cc::MathUtil::IsWithinEpsilon(vec.y(), 0.f);
if (x_zero && !y_zero)
return (vec.y() > 0.f) ? AXIS_POS_Y : AXIS_NEG_Y;
else if (y_zero && !x_zero)
return (vec.x() > 0.f) ? AXIS_POS_X : AXIS_NEG_X;
else
return NONE;
}
gfx::OverlayTransform GetOverlayTransform(const gfx::Transform& quad_transform,
bool y_flipped,
bool supports_flip_rotate_transform) {
if (!quad_transform.Preserves2dAxisAlignment()) {
return gfx::OVERLAY_TRANSFORM_INVALID;
}
gfx::Vector3dF x_axis = cc::MathUtil::GetXAxis(quad_transform);
gfx::Vector3dF y_axis = cc::MathUtil::GetYAxis(quad_transform);
if (y_flipped) {
y_axis.Scale(-1.f);
}
Axis x_to = VectorToAxis(x_axis);
Axis y_to = VectorToAxis(y_axis);
if (x_to == AXIS_POS_X && y_to == AXIS_POS_Y) {
return gfx::OVERLAY_TRANSFORM_NONE;
} else if (x_to == AXIS_NEG_X && y_to == AXIS_POS_Y) {
return gfx::OVERLAY_TRANSFORM_FLIP_HORIZONTAL;
} else if (x_to == AXIS_POS_X && y_to == AXIS_NEG_Y) {
return gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL;
} else if (x_to == AXIS_NEG_Y && y_to == AXIS_POS_X) {
return gfx::OVERLAY_TRANSFORM_ROTATE_CLOCKWISE_270;
} else if (x_to == AXIS_NEG_X && y_to == AXIS_NEG_Y) {
return gfx::OVERLAY_TRANSFORM_ROTATE_CLOCKWISE_180;
} else if (x_to == AXIS_POS_Y && y_to == AXIS_NEG_X) {
return gfx::OVERLAY_TRANSFORM_ROTATE_CLOCKWISE_90;
} else if (supports_flip_rotate_transform) {
if (x_to == AXIS_POS_Y && y_to == AXIS_POS_X) {
return gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL_CLOCKWISE_90;
} else if (x_to == AXIS_NEG_Y && y_to == AXIS_NEG_X) {
return gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL_CLOCKWISE_270;
}
return gfx::OVERLAY_TRANSFORM_INVALID;
} else {
return gfx::OVERLAY_TRANSFORM_INVALID;
}
}
constexpr double kEpsilon = 0.0001;
// Determine why the transformation isn't axis aligned. A transform with z
// components or perspective would require a full 4x4 matrix to delegate, a
// transform with a shear component would require a 2x2 matrix to delegate, and
// a 2d rotation transform could be delegated with an angle.
// This is only useful for delegated compositing.
OverlayCandidate::CandidateStatus GetReasonForTransformNotAxisAligned(
const gfx::Transform& transform) {
if (transform.HasPerspective() || !transform.IsFlat())
return OverlayCandidate::CandidateStatus::kFailNotAxisAligned3dTransform;
// The transform has a shear component if the x and y sub-vectors are not
// perpendicular (have a non-zero dot product).
gfx::Vector2dF x_part(transform.rc(0, 0), transform.rc(1, 0));
gfx::Vector2dF y_part(transform.rc(0, 1), transform.rc(1, 1));
// Normalize to avoid numerical issues.
x_part.InvScale(x_part.Length());
y_part.InvScale(y_part.Length());
if (std::abs(gfx::DotProduct(x_part, y_part)) > kEpsilon)
return OverlayCandidate::CandidateStatus::kFailNotAxisAligned2dShear;
return OverlayCandidate::CandidateStatus::kFailNotAxisAligned2dRotation;
}
// Returns true if the overlay candidate bounds rect overlap with at least one
// of the rounded corners bounding rects.
bool ShouldApplyRoundedCorner(OverlayCandidate& candidate,
const DrawQuad* quad) {
const gfx::RectF target_rect =
OverlayCandidate::DisplayRectInTargetSpace(candidate);
return QuadRoundedCornersBoundsIntersects(quad, target_rect);
}
bool RequiresBlendingForReasonOtherThanRoundedCorners(const DrawQuad* quad) {
return quad->ShouldDrawWithBlendingForReasonOtherThanMaskFilter() ||
quad->shared_quad_state->mask_filter_info.HasGradientMask();
}
} // namespace
OverlayCandidateFactory::OverlayContext::OverlayContext() = default;
OverlayCandidateFactory::OverlayContext::OverlayContext(const OverlayContext&) =
default;
OverlayCandidate::CandidateStatus OverlayCandidateFactory::FromDrawQuad(
const DrawQuad* quad,
OverlayCandidate& candidate) const {
// It is currently not possible to set a color conversion matrix on an HW
// overlay plane.
// TODO(https://crbug.com/792757): Remove this check once the bug is resolved.
if (has_custom_color_matrix_) {
return CandidateStatus::kFailColorMatrix;
}
const SharedQuadState* sqs = quad->shared_quad_state;
// We don't support an opacity value different than one for an overlay plane.
// Render pass quads should have their |sqs| opacity integrated directly into
// their final output buffers.
if (!context_.is_delegated_context &&
!cc::MathUtil::IsWithinEpsilon(sqs->opacity, 1.0f)) {
return CandidateStatus::kFailOpacity;
}
candidate.opacity = sqs->opacity;
// We support only kSrc (no blending) and kSrcOver (blending with premul).
if (!(sqs->blend_mode == SkBlendMode::kSrc ||
sqs->blend_mode == SkBlendMode::kSrcOver)) {
return CandidateStatus::kFailBlending;
}
if (sqs->mask_filter_info.HasGradientMask()) {
return CandidateStatus::kFailMaskFilterNotSupported;
}
candidate.requires_overlay = OverlayCandidate::RequiresOverlay(quad);
candidate.overlay_damage_index =
sqs->overlay_damage_index.value_or(OverlayCandidate::kInvalidDamageIndex);
auto status = CandidateStatus::kFailQuadNotSupported;
switch (quad->material) {
case DrawQuad::Material::kTextureContent:
status = FromTextureQuad(TextureDrawQuad::MaterialCast(quad), candidate);
break;
case DrawQuad::Material::kVideoHole:
status =
FromVideoHoleQuad(VideoHoleDrawQuad::MaterialCast(quad), candidate);
break;
case DrawQuad::Material::kSolidColor:
if (context_.is_delegated_context) {
status = FromSolidColorQuad(SolidColorDrawQuad::MaterialCast(quad),
candidate);
}
break;
case DrawQuad::Material::kAggregatedRenderPass:
if (context_.is_delegated_context) {
status = FromAggregateQuad(
AggregatedRenderPassDrawQuad::MaterialCast(quad), candidate);
}
break;
case DrawQuad::Material::kTiledContent:
if (context_.is_delegated_context) {
status = FromTileQuad(TileDrawQuad::MaterialCast(quad), candidate);
}
break;
default:
break;
}
return status;
}
OverlayCandidateFactory::OverlayCandidateFactory(
const AggregatedRenderPass* render_pass,
const DisplayResourceProvider* resource_provider,
const SurfaceDamageRectList* surface_damage_rect_list,
const SkM44* output_color_matrix,
const gfx::RectF primary_rect,
const OverlayProcessorInterface::FilterOperationsMap* render_pass_filters,
const OverlayContext& context)
: render_pass_(render_pass),
resource_provider_(resource_provider),
surface_damage_rect_list_(surface_damage_rect_list),
primary_rect_(primary_rect),
render_pass_filters_(render_pass_filters),
context_(context) {
DCHECK(context_.supports_clip_rect || !context_.supports_arbitrary_transform);
DCHECK(!context_.disable_wire_size_optimization ||
context_.supports_arbitrary_transform);
has_custom_color_matrix_ = *output_color_matrix != SkM44();
// TODO(crbug.com/40224514): Replace this set with a simple ordered linear
// search when this bug is resolved.
base::flat_set<size_t> indices_with_quad_damage;
for (auto* sqs : render_pass_->shared_quad_state_list) {
// If a |sqs| has a damage index it will only be associated with a single
// draw quad.
if (sqs->overlay_damage_index.has_value()) {
indices_with_quad_damage.insert(sqs->overlay_damage_index.value());
}
}
for (size_t i = 0; i < (*surface_damage_rect_list_).size(); i++) {
// Add this damage only if it does not correspond to a specific quad.
// Ideally any damage that we might want to separate out (think overlays)
// will not end up in this |unassigned_surface_damage_| rect.
if (!indices_with_quad_damage.contains(i)) {
unassigned_surface_damage_.Union((*surface_damage_rect_list_)[i]);
}
}
}
OverlayCandidateFactory::~OverlayCandidateFactory() = default;
float OverlayCandidateFactory::EstimateVisibleDamage(
const DrawQuad* quad,
const OverlayCandidate& candidate,
QuadList::ConstIterator quad_list_begin,
QuadList::ConstIterator quad_list_end) const {
gfx::Rect quad_damage = gfx::ToEnclosingRect(GetDamageEstimate(candidate));
float occluded_damage_estimate_total = 0.f;
for (auto overlap_iter = quad_list_begin; overlap_iter != quad_list_end;
++overlap_iter) {
gfx::Rect overlap_rect = gfx::ToEnclosingRect(cc::MathUtil::MapClippedRect(
overlap_iter->shared_quad_state->quad_to_target_transform,
gfx::RectF(overlap_iter->rect)));
// Opaque quad that (partially) occludes this candidate.
if (!OverlayCandidate::IsInvisibleQuad(*overlap_iter) &&
!overlap_iter->ShouldDrawWithBlending()) {
overlap_rect.Intersect(quad_damage);
occluded_damage_estimate_total += overlap_rect.size().GetArea();
}
}
// In the case of overlapping UI the |occluded_damage_estimate_total| may
// exceed the |quad|'s damage rect that is in consideration. This is the
// reason why this computation is an estimate and why we have the max clamping
// below.
return std::max(
0.f, quad_damage.size().GetArea() - occluded_damage_estimate_total);
}
// static
bool OverlayCandidateFactory::IsOccludedByFilteredQuad(
const DrawQuad& quad,
QuadList::ConstIterator quad_list_begin,
QuadList::ConstIterator quad_list_end,
const base::flat_map<AggregatedRenderPassId,
raw_ptr<cc::FilterOperations, CtnExperimental>>&
render_pass_backdrop_filters) {
const gfx::RectF target_rect =
quad.shared_quad_state->quad_to_target_transform.MapRect(
gfx::RectF(quad.visible_rect));
for (auto overlap_iter = quad_list_begin; overlap_iter != quad_list_end;
++overlap_iter) {
if (auto* render_pass_draw_quad =
overlap_iter->DynamicCast<AggregatedRenderPassDrawQuad>()) {
gfx::RectF overlap_rect = cc::MathUtil::MapClippedRect(
overlap_iter->shared_quad_state->quad_to_target_transform,
gfx::RectF(overlap_iter->rect));
if (target_rect.Intersects(overlap_rect) &&
render_pass_backdrop_filters.count(
render_pass_draw_quad->render_pass_id)) {
return true;
}
}
}
return false;
}
// static
bool OverlayCandidateFactory::IsOccluded(
const DrawQuad& quad,
QuadList::ConstIterator quad_list_begin,
QuadList::ConstIterator quad_list_end) {
// The rects are rounded as they're snapped by the compositor to pixel unless
// it is AA'ed, in which case, it won't be overlaid.
const gfx::Rect target_rect = gfx::ToRoundedRect(
quad.shared_quad_state->quad_to_target_transform.MapRect(
gfx::RectF(quad.visible_rect)));
// Check that no visible quad overlaps the candidate.
for (auto overlap_iter = quad_list_begin; overlap_iter != quad_list_end;
++overlap_iter) {
gfx::Rect overlap_rect = gfx::ToRoundedRect(cc::MathUtil::MapClippedRect(
overlap_iter->shared_quad_state->quad_to_target_transform,
gfx::RectF(overlap_iter->rect)));
if (!OverlayCandidate::IsInvisibleQuad(*overlap_iter) &&
target_rect.Intersects(overlap_rect)) {
return true;
}
}
return false;
}
OverlayCandidate::CandidateStatus OverlayCandidateFactory::FromDrawQuadResource(
const DrawQuad* quad,
ResourceId resource_id,
bool y_flipped,
OverlayCandidate& candidate) const {
if (resource_id != kInvalidResourceId &&
!resource_provider_->IsOverlayCandidate(resource_id)) {
return CandidateStatus::kFailNotOverlay;
}
if (quad->visible_rect.IsEmpty())
return CandidateStatus::kFailVisible;
if (resource_id != kInvalidResourceId) {
candidate.format = resource_provider_->GetSharedImageFormat(resource_id);
candidate.color_space = resource_provider_->GetColorSpace(resource_id);
candidate.needs_detiling =
resource_provider_->GetNeedsDetiling(resource_id);
candidate.hdr_metadata = resource_provider_->GetHDRMetadata(resource_id);
candidate.low_latency_rendering =
resource_provider_->IsLowLatencyRendering(resource_id);
if (!context_.is_delegated_context &&
!base::Contains(kOverlayFormats, candidate.format)) {
return CandidateStatus::kFailBufferFormat;
}
}
SetDisplayRect(*quad, candidate);
const SharedQuadState* sqs = quad->shared_quad_state;
if (auto status =
ApplyTransform(sqs->quad_to_target_transform, y_flipped, candidate);
status != CandidateStatus::kSuccess) {
return status;
}
candidate.is_opaque =
!quad->ShouldDrawWithBlendingForReasonOtherThanMaskFilter();
if (resource_id != kInvalidResourceId) {
candidate.resource_size_in_pixels =
resource_provider_->GetResourceBackedSize(resource_id);
}
AssignDamage(quad, candidate);
candidate.resource_id = resource_id;
if (resource_id != kInvalidResourceId) {
candidate.mailbox = resource_provider_->GetMailbox(resource_id);
if (!context_.is_delegated_context) {
struct TrackingIdData {
gfx::Rect rect;
FrameSinkId frame_sink_id;
};
TrackingIdData track_data{
quad->rect,
resource_provider_->GetSurfaceId(resource_id).frame_sink_id()};
// Assert that there is no padding - otherwise the bytes-based hash below
// may differ for otherwise equal objects.
static_assert(sizeof(track_data) ==
sizeof(decltype(track_data.rect)) +
sizeof(decltype(track_data.frame_sink_id)));
// Intentionally throwing away the high bits (assuming that hash entropy
// is uniformly spread across all the bits).
size_t original_hash =
base::FastHash(base::byte_span_from_ref(track_data));
uint32_t narrow_hash = static_cast<uint32_t>(original_hash);
candidate.tracking_id = narrow_hash;
}
}
candidate.clip_rect = sqs->clip_rect;
if (context_.is_delegated_context) {
const bool quad_within_window =
primary_rect_.Contains(candidate.display_rect);
const bool transform_supports_clipping =
context_.supports_arbitrary_transform ||
std::holds_alternative<gfx::OverlayTransform>(candidate.transform);
bool can_delegate_clipping =
context_.supports_clip_rect &&
(quad_within_window || context_.supports_out_of_window_clip_rect) &&
transform_supports_clipping;
bool is_rpdq = !!quad->DynamicCast<AggregatedRenderPassDrawQuad>();
if (is_rpdq) {
can_delegate_clipping &= context_.transform_and_clip_rpdq;
}
if (can_delegate_clipping) {
// If we know the clip_rect won't intersect the display_rect at all, we
// can skip it. We must account for any transform to the display_rect.
if (candidate.clip_rect.has_value() &&
!OverlayCandidate::DisplayRectInTargetSpace(candidate).Intersects(
gfx::RectF(*candidate.clip_rect))) {
return CandidateStatus::kFailVisible;
}
} else {
// Clipping is applied after transforms, so we can't delegate transforms
// if we can't delegate clipping.
if (std::holds_alternative<gfx::Transform>(candidate.transform)) {
return CandidateStatus::kFailHasTransformButCantClip;
}
// Apply clipping to the |display_rect| and |uv_rect| directly.
auto status = DoGeometricClipping(quad, candidate);
if (status != CandidateStatus::kSuccess) {
return status;
}
}
}
candidate.has_mask_filter = !sqs->mask_filter_info.IsEmpty();
// Conditionally set the rounded corners once the candidate's |display_rect|
// is known.
if (context_.disable_wire_size_optimization ||
ShouldApplyRoundedCorner(candidate, quad)) {
if (!context_.supports_mask_filter) {
return CandidateStatus::kFailMaskFilterNotSupported;
}
candidate.rounded_corners = sqs->mask_filter_info.rounded_corner_bounds();
}
return CandidateStatus::kSuccess;
}
void OverlayCandidateFactory::SetDisplayRect(
const DrawQuad& quad,
OverlayCandidate& candidate) const {
if (context_.is_delegated_context && quad.visible_rect != quad.rect) {
candidate.display_rect = gfx::RectF(quad.visible_rect);
// Update uv_rect to account for the content clipping.
candidate.uv_rect = cc::MathUtil::ScaleRectProportional(
candidate.uv_rect, gfx::RectF(quad.rect),
gfx::RectF(quad.visible_rect));
} else {
candidate.display_rect = gfx::RectF(quad.rect);
}
if (context_.is_delegated_context) {
// Expand display_rect if quad is a render pass with a filter that expands
// its bounds.
if (auto* rpdq = quad.DynamicCast<AggregatedRenderPassDrawQuad>()) {
auto filter_it = render_pass_filters_->find(rpdq->render_pass_id);
if (filter_it != render_pass_filters_->end()) {
candidate.display_rect = gfx::RectF(
GetExpandedRectForPixelMovingFilters(*rpdq, *filter_it->second));
// uv_rect will be updated in SkiaRenderer because the buffer size will
// be rounded up some.
}
}
}
}
OverlayCandidate::CandidateStatus OverlayCandidateFactory::DoGeometricClipping(
const DrawQuad* quad,
OverlayCandidate& candidate) const {
gfx::RectF clip_to_apply = candidate.display_rect;
if (candidate.clip_rect.has_value()) {
clip_to_apply.Intersect(gfx::RectF(*candidate.clip_rect));
}
// TODO(crbug.com/40216317) : Tile quads can overlay other quads
// and the window by one pixel. Exo does not yet clip these quads so we
// need to clip here with the |primary_rect|.
clip_to_apply.Intersect(primary_rect_);
if (clip_to_apply.IsEmpty()) {
return CandidateStatus::kFailVisible;
}
OverlayCandidate::ApplyClip(candidate, clip_to_apply);
candidate.clip_rect = std::nullopt;
return CandidateStatus::kSuccess;
}
OverlayCandidate::CandidateStatus OverlayCandidateFactory::ApplyTransform(
const gfx::Transform& quad_to_target_transform,
const bool y_flipped,
OverlayCandidate& candidate) const {
// Try to bake |quad_to_target_transform| into |display_rect| to avoid sending
// a full |gfx::Transform|.
if (!context_.disable_wire_size_optimization) {
gfx::OverlayTransform overlay_transform =
GetOverlayTransform(quad_to_target_transform, y_flipped,
context_.supports_flip_rotate_transform);
if (overlay_transform != gfx::OVERLAY_TRANSFORM_INVALID) {
candidate.transform = overlay_transform;
candidate.display_rect =
quad_to_target_transform.MapRect(candidate.display_rect);
return OverlayCandidate::CandidateStatus::kSuccess;
}
}
// Otherwise, try to set an arbitrary transform, if possible.
if (context_.supports_arbitrary_transform &&
(!quad_to_target_transform.HasPerspective() ||
quad_to_target_transform.Preserves2dAffine())) {
gfx::Transform transform = quad_to_target_transform;
if (y_flipped) {
transform.PreConcat(gfx::OverlayTransformToTransform(
gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL, candidate.display_rect.size()));
}
candidate.transform = transform;
return OverlayCandidate::CandidateStatus::kSuccess;
}
return context_.is_delegated_context
? GetReasonForTransformNotAxisAligned(quad_to_target_transform)
: CandidateStatus::kFailNotAxisAligned;
}
OverlayCandidate::CandidateStatus OverlayCandidateFactory::FromAggregateQuad(
const AggregatedRenderPassDrawQuad* quad,
OverlayCandidate& candidate) const {
auto rtn = FromDrawQuadResource(quad, kInvalidResourceId, false, candidate);
if (rtn == CandidateStatus::kSuccess) {
candidate.rpdq = quad;
}
return rtn;
}
OverlayCandidate::CandidateStatus OverlayCandidateFactory::FromSolidColorQuad(
const SolidColorDrawQuad* quad,
OverlayCandidate& candidate) const {
auto rtn = FromDrawQuadResource(quad, kInvalidResourceId, false, candidate);
if (rtn == CandidateStatus::kSuccess) {
candidate.color = quad->color;
// Mark this candidate a solid color as the |color| member can be either a
// background of the overlay or a color of the solid color quad.
candidate.is_solid_color = true;
}
return rtn;
}
// For VideoHoleDrawQuad, only calculate geometry information and put it in the
// |candidate|.
OverlayCandidate::CandidateStatus OverlayCandidateFactory::FromVideoHoleQuad(
const VideoHoleDrawQuad* quad,
OverlayCandidate& candidate) const {
candidate.display_rect = gfx::RectF(quad->rect);
const SharedQuadState* sqs = quad->shared_quad_state;
if (context_.supports_arbitrary_transform) {
candidate.transform = sqs->quad_to_target_transform;
} else {
gfx::OverlayTransform overlay_transform =
GetOverlayTransform(sqs->quad_to_target_transform, false,
context_.supports_flip_rotate_transform);
if (overlay_transform == gfx::OVERLAY_TRANSFORM_INVALID)
return CandidateStatus::kFailNotAxisAligned;
candidate.transform = overlay_transform;
candidate.display_rect =
sqs->quad_to_target_transform.MapRect(candidate.display_rect);
}
candidate.is_opaque =
!quad->ShouldDrawWithBlendingForReasonOtherThanMaskFilter();
AssignDamage(quad, candidate);
// Intentionally throwing away the high bits (assuming that hash entropy is
// uniformly spread across all the bits).
size_t original_hash = base::FastHash(quad->overlay_plane_id.AsBytes());
uint32_t narrow_hash = static_cast<uint32_t>(original_hash);
candidate.tracking_id = narrow_hash;
return CandidateStatus::kSuccess;
}
OverlayCandidate::CandidateStatus OverlayCandidateFactory::FromTileQuad(
const TileDrawQuad* quad,
OverlayCandidate& candidate) const {
if (quad->nearest_neighbor)
return CandidateStatus::kFailNearFilter;
candidate.resource_size_in_pixels =
resource_provider_->GetResourceBackedSize(quad->resource_id);
candidate.uv_rect = gfx::ScaleRect(
quad->tex_coord_rect, 1.f / candidate.resource_size_in_pixels.width(),
1.f / candidate.resource_size_in_pixels.height());
auto rtn = FromDrawQuadResource(quad, quad->resource_id, false, candidate);
return rtn;
}
OverlayCandidate::CandidateStatus OverlayCandidateFactory::FromTextureQuad(
const TextureDrawQuad* quad,
OverlayCandidate& candidate) const {
if (!context_.is_delegated_context &&
quad->overlay_priority_hint == OverlayPriority::kLow) {
// For current implementation low priority means this does not promote to
// overlay.
return CandidateStatus::kFailPriority;
}
if (!quad->rounded_display_masks_info.IsEmpty() &&
!context_.supports_rounded_display_masks) {
DCHECK(!context_.is_delegated_context);
return CandidateStatus::kFailRoundedDisplayMasksNotSupported;
}
if (quad->nearest_neighbor)
return CandidateStatus::kFailNearFilter;
if (context_.is_delegated_context) {
// Always convey |background_color| even when transparent. This allows for
// the wayland server to make blending optimizations even when the quad is
// considered opaque. Specifically Exo will try to ensure the opaqueness of
// alpha formats by adding a black background which can cause difficulty in
// overlay promotion (see the code in the lines below).
candidate.color = quad->background_color;
} else if (quad->background_color != SkColors::kTransparent &&
(quad->background_color != SkColors::kBlack ||
RequiresBlendingForReasonOtherThanRoundedCorners(quad))) {
// The condition above is very specific to the implementation of DRM/KMS
// scanout. An opaque plane with buffer that has buffer element component
// alpha will default black for the blend. Basically we can simulate a black
// background using the default color when blending an opaque overlay. This
// trick, of course, only works for black.
return CandidateStatus::kFailBlending;
}
candidate.uv_rect = BoundingRect(quad->uv_top_left, quad->uv_bottom_right);
const bool y_flipped = resource_provider_->GetOrigin(quad->resource_id) ==
kBottomLeft_GrSurfaceOrigin;
auto rtn =
FromDrawQuadResource(quad, quad->resource_id, y_flipped, candidate);
if (rtn == CandidateStatus::kSuccess) {
// Only handle clip rect for required overlays
if (!context_.is_delegated_context && candidate.requires_overlay) {
HandleClipAndSubsampling(candidate);
}
if (candidate.requires_overlay) {
candidate.priority_hint = gfx::OverlayPriorityHint::kHardwareProtection;
} else if (quad->is_video_frame) {
candidate.priority_hint = gfx::OverlayPriorityHint::kVideo;
} else {
candidate.priority_hint = gfx::OverlayPriorityHint::kRegular;
}
candidate.protected_video_type = quad->protected_video_type;
#if BUILDFLAG(IS_ANDROID)
candidate.is_video_in_surface_view =
resource_provider_->IsBackedBySurfaceView(quad->resource_id);
#endif
candidate.has_rounded_display_masks =
!quad->rounded_display_masks_info.IsEmpty();
}
return rtn;
}
void OverlayCandidateFactory::HandleClipAndSubsampling(
OverlayCandidate& candidate) const {
// The purpose of this is to enable overlays that are required (i.e. protected
// content) to be able to be shown in all cases. This will allow them to pass
// the clipping check and also the 2x alignment requirement for subsampling in
// the Intel DRM driver. This should not be used in cases where the surface
// will not always be promoted to an overlay as it will lead to shifting of
// the content when it switches between composition and overlay.
if (!candidate.clip_rect)
return;
// Make sure it's in a format we can deal with, we only support YUV and P010.
if (candidate.format != MultiPlaneFormat::kNV12 &&
candidate.format != MultiPlaneFormat::kP010) {
return;
}
// Clip the clip rect to the primary plane. An overlay will only be shown on
// a single display, so we want to perform our calculations within the bounds
// of that display.
if (!primary_rect_.IsEmpty())
candidate.clip_rect->Intersect(gfx::ToNearestRect(primary_rect_));
// Baking |clip_rect| into the |uv_rect| and |display_rect| doesn't make sense
// when there is an arbitrary transform between the two because the transform
// may not preserve axis alignment.
DCHECK(std::holds_alternative<gfx::OverlayTransform>(candidate.transform));
// Candidates that need detiling have a UV rect that indicates the
// relationship between the visible rect and the backing buffer dimensions
// (coded size). This rect is calculated assuming no rotation, so we need to
// rotate it before applying our own clipping.
if (candidate.needs_detiling &&
std::holds_alternative<gfx::OverlayTransform>(candidate.transform)) {
switch (std::get<gfx::OverlayTransform>(candidate.transform)) {
case gfx::OVERLAY_TRANSFORM_ROTATE_CLOCKWISE_90:
candidate.uv_rect =
gfx::RectF(1.0f - candidate.uv_rect.height(), candidate.uv_rect.x(),
candidate.uv_rect.height(), candidate.uv_rect.width());
break;
case gfx::OVERLAY_TRANSFORM_ROTATE_CLOCKWISE_180:
candidate.uv_rect = gfx::RectF(
1.0f - candidate.uv_rect.width(), 1.0f - candidate.uv_rect.height(),
candidate.uv_rect.width(), candidate.uv_rect.height());
break;
case gfx::OVERLAY_TRANSFORM_ROTATE_CLOCKWISE_270:
candidate.uv_rect =
gfx::RectF(candidate.uv_rect.y(), 1.0f - candidate.uv_rect.width(),
candidate.uv_rect.height(), candidate.uv_rect.width());
break;
default:
break;
}
}
// Calculate |uv_rect| of |clip_rect| in |display_rect|
// TODO(rivr): Handle candidates with an overlay transform applied.
gfx::RectF uv_rect = cc::MathUtil::ScaleRectProportional(
candidate.uv_rect, candidate.display_rect,
gfx::RectF(*candidate.clip_rect));
// In case that |uv_rect| of candidate is not (0, 0, 1, 1)
candidate.uv_rect.Intersect(uv_rect);
// Update |display_rect| to avoid unexpected scaling and the candidate should
// not be regarded as clippped after this.
candidate.display_rect.Intersect(gfx::RectF(*candidate.clip_rect));
candidate.clip_rect.reset();
gfx::Rect rounded_display_rect = gfx::ToRoundedRect(candidate.display_rect);
candidate.display_rect.SetRect(
rounded_display_rect.x(), rounded_display_rect.y(),
rounded_display_rect.width(), rounded_display_rect.height());
// Now correct |uv_rect| if required so that the source rect aligns on a pixel
// boundary that is a multiple of the chroma subsampling.
// Get the rect for the source coordinates.
gfx::RectF src_rect = gfx::ScaleRect(
candidate.uv_rect, candidate.resource_size_in_pixels.width(),
candidate.resource_size_in_pixels.height());
// Make it an integral multiple of the subsampling factor.
auto subsample_round = [](float val) {
constexpr int kSubsamplingFactor = 2;
return (std::lround(val) / kSubsamplingFactor) * kSubsamplingFactor;
};
src_rect.set_x(subsample_round(src_rect.x()));
src_rect.set_y(subsample_round(src_rect.y()));
src_rect.set_width(subsample_round(src_rect.width()));
src_rect.set_height(subsample_round(src_rect.height()));
// Scale it back into UV space and set it in the candidate.
candidate.uv_rect =
gfx::ScaleRect(src_rect, 1.0f / candidate.resource_size_in_pixels.width(),
1.0f / candidate.resource_size_in_pixels.height());
}
void OverlayCandidateFactory::AssignDamage(const DrawQuad* quad,
OverlayCandidate& candidate) const {
candidate.damage_rect = GetDamageRect(quad);
// For underlays the function 'EstimateVisibleDamage()' is called to update
// |damage_area_estimate| to more accurately reflect the actual visible
// damage.
if (!context_.is_delegated_context) {
candidate.damage_area_estimate =
GetDamageEstimate(candidate).size().GetArea();
}
}
gfx::RectF OverlayCandidateFactory::GetDamageEstimate(
const OverlayCandidate& candidate) const {
// If we have assigned damage we can trust that.
if (!candidate.damage_rect.IsEmpty()) {
return candidate.damage_rect;
}
// Otherwise we will see how much unassigned damage covers the display_rect.
return gfx::IntersectRects(
OverlayCandidate::DisplayRectInTargetSpace(candidate),
gfx::RectF(unassigned_surface_damage_));
}
gfx::RectF OverlayCandidateFactory::GetDamageRect(const DrawQuad* quad) const {
const SharedQuadState* sqs = quad->shared_quad_state;
if (!sqs->overlay_damage_index.has_value()) {
return gfx::RectF();
}
size_t overlay_damage_index = sqs->overlay_damage_index.value();
// Invalid index.
if (overlay_damage_index >= surface_damage_rect_list_->size()) {
DCHECK(false);
return gfx::RectF();
}
auto damage = gfx::RectF((*surface_damage_rect_list_)[overlay_damage_index]);
DBG_DRAW_RECT("damage_assigned", damage);
return damage;
}
} // namespace viz
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