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// Copyright 2020 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 "components/viz/service/display_embedder/output_presenter.h"
#include <utility>
#include "components/viz/service/display_embedder/skia_output_surface_dependency.h"
#include "gpu/command_buffer/service/shared_context_state.h"
#include "gpu/command_buffer/service/shared_image_factory.h"
#include "third_party/skia/include/gpu/GrBackendSemaphore.h"
#include "third_party/skia/include/gpu/GrDirectContext.h"
namespace viz {
OutputPresenter::Image::Image() = default;
OutputPresenter::Image::~Image() {
// TODO(vasilyt): As we are going to delete image anyway we should be able
// to abort write to avoid unnecessary flush to submit semaphores.
if (scoped_skia_write_access_) {
EndWriteSkia();
}
DCHECK(!scoped_skia_write_access_);
}
bool OutputPresenter::Image::Initialize(
gpu::SharedImageFactory* factory,
gpu::SharedImageRepresentationFactory* representation_factory,
const gpu::Mailbox& mailbox,
SkiaOutputSurfaceDependency* deps) {
skia_representation_ = representation_factory->ProduceSkia(
mailbox, deps->GetSharedContextState());
if (!skia_representation_) {
DLOG(ERROR) << "ProduceSkia() failed.";
return false;
}
// Initialize |shared_image_deleter_| to make sure the shared image backing
// will be released with the Image.
shared_image_deleter_.ReplaceClosure(base::BindOnce(
base::IgnoreResult(&gpu::SharedImageFactory::DestroySharedImage),
base::Unretained(factory), mailbox));
return true;
}
void OutputPresenter::Image::BeginWriteSkia(int sample_count) {
DCHECK(!scoped_skia_write_access_);
DCHECK(!GetPresentCount());
DCHECK(end_semaphores_.empty());
std::vector<GrBackendSemaphore> begin_semaphores;
SkSurfaceProps surface_props{0, kUnknown_SkPixelGeometry};
// Buffer queue is internal to GPU proc and handles texture initialization,
// so allow uncleared access.
scoped_skia_write_access_ = skia_representation_->BeginScopedWriteAccess(
sample_count, surface_props, &begin_semaphores, &end_semaphores_,
gpu::SharedImageRepresentation::AllowUnclearedAccess::kYes);
DCHECK(scoped_skia_write_access_);
if (!begin_semaphores.empty()) {
scoped_skia_write_access_->surface()->wait(
begin_semaphores.size(),
begin_semaphores.data(),
/*deleteSemaphoresAfterWait=*/false);
}
}
SkSurface* OutputPresenter::Image::sk_surface() {
return scoped_skia_write_access_ ? scoped_skia_write_access_->surface()
: nullptr;
}
std::vector<GrBackendSemaphore>
OutputPresenter::Image::TakeEndWriteSkiaSemaphores() {
std::vector<GrBackendSemaphore> result;
result.swap(end_semaphores_);
return result;
}
void OutputPresenter::Image::EndWriteSkia(bool force_flush) {
// The Flush now takes place in finishPaintCurrentBuffer on the CPU side.
// check if end_semaphores is not empty then flush here
DCHECK(scoped_skia_write_access_);
auto end_state = scoped_skia_write_access_->TakeEndState();
if (!end_semaphores_.empty() || end_state || force_flush) {
GrFlushInfo flush_info = {
.fNumSemaphores = end_semaphores_.size(),
.fSignalSemaphores = end_semaphores_.data(),
};
scoped_skia_write_access_->surface()->flush(flush_info, end_state.get());
auto* direct_context = scoped_skia_write_access_->surface()
->recordingContext()
->asDirectContext();
DCHECK(direct_context);
direct_context->submit();
}
scoped_skia_write_access_.reset();
end_semaphores_.clear();
// SkiaRenderer always draws the full frame.
skia_representation_->SetCleared();
}
void OutputPresenter::Image::PreGrContextSubmit() {
DCHECK(scoped_skia_write_access_);
if (auto end_state = scoped_skia_write_access_->TakeEndState()) {
scoped_skia_write_access_->surface()->flush({}, end_state.get());
}
}
std::unique_ptr<OutputPresenter::Image> OutputPresenter::AllocateSingleImage(
gfx::ColorSpace color_space,
gfx::Size image_size) {
return nullptr;
}
void OutputPresenter::ScheduleOneOverlay(const OverlayCandidate& overlay,
ScopedOverlayAccess* access) {
NOTREACHED();
}
} // namespace viz
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