chromium/gpu/command_buffer/service/shared_image/dawn_fallback_image_representation.cc

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "gpu/command_buffer/service/shared_image/dawn_fallback_image_representation.h"

#include <dawn/native/DawnNative.h>

#include "base/bits.h"
#include "base/synchronization/atomic_flag.h"
#include "base/threading/platform_thread.h"
#include "components/viz/common/resources/shared_image_format_utils.h"
#include "gpu/command_buffer/common/shared_image_usage.h"
#include "gpu/command_buffer/service/shared_image/shared_image_format_service_utils.h"
#include "gpu/config/gpu_finch_features.h"
#include "ui/gfx/geometry/skia_conversions.h"

namespace gpu {

DawnFallbackImageRepresentation::DawnFallbackImageRepresentation(
    SharedImageManager* manager,
    SharedImageBacking* backing,
    MemoryTypeTracker* tracker,
    wgpu::Device device,
    wgpu::TextureFormat wgpu_format,
    std::vector<wgpu::TextureFormat> view_formats)
    : … { … }

DawnFallbackImageRepresentation::~DawnFallbackImageRepresentation() = default;

bool DawnFallbackImageRepresentation::ComputeStagingBufferParams(
    int plane_index,
    uint32_t* bytes_per_row,
    size_t* bytes_per_plane) const { … }

// Allocate staging buffers. One staging buffer per plane.
bool DawnFallbackImageRepresentation::AllocateStagingBuffers(
    wgpu::BufferUsage usage,
    bool map_at_creation,
    std::vector<StagingBuffer>* buffers) { … }

SkPixmap DawnFallbackImageRepresentation::MappedStagingBufferToPixmap(
    const StagingBuffer& staging_buffer,
    int plane_index,
    bool writable) { … }

bool DawnFallbackImageRepresentation::ReadbackFromBacking() { … }

bool DawnFallbackImageRepresentation::UploadToBacking() { … }

wgpu::Texture DawnFallbackImageRepresentation::BeginAccess(
    wgpu::TextureUsage wgpu_texture_usage,
    wgpu::TextureUsage internal_usage) { … }

void DawnFallbackImageRepresentation::EndAccess() { … }

}  // namespace gpu