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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "gpu/command_buffer/client/fake_gpu_memory_buffer.h"
#include "base/atomic_sequence_num.h"
#include "build/build_config.h"
#include "media/base/format_utils.h"
#include "media/base/video_frame.h"
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#endif
#if BUILDFLAG(IS_FUCHSIA)
#include <lib/zx/eventpair.h>
#include <lib/zx/object.h>
#endif
namespace gpu {
namespace {
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
base::ScopedFD GetDummyFD() {
base::ScopedFD fd(open("/dev/zero", O_RDWR));
DCHECK(fd.is_valid());
return fd;
}
#endif
static base::AtomicSequenceNumber buffer_id_generator;
} // namespace
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
gfx::GpuMemoryBufferHandle CreatePixmapHandleForTesting(
const gfx::Size& size,
gfx::BufferFormat format,
uint64_t modifier) {
std::optional<media::VideoPixelFormat> video_pixel_format =
media::GfxBufferFormatToVideoPixelFormat(format);
CHECK(video_pixel_format);
gfx::NativePixmapHandle native_pixmap_handle;
for (size_t i = 0; i < media::VideoFrame::NumPlanes(*video_pixel_format);
i++) {
const gfx::Size plane_size_in_bytes =
media::VideoFrame::PlaneSize(*video_pixel_format, i, size);
native_pixmap_handle.planes.emplace_back(plane_size_in_bytes.width(), 0,
plane_size_in_bytes.GetArea(),
GetDummyFD());
}
native_pixmap_handle.modifier = modifier;
gfx::GpuMemoryBufferHandle handle(std::move(native_pixmap_handle));
handle.id = gfx::GpuMemoryBufferId(buffer_id_generator.GetNext());
return handle;
}
#endif
FakeGpuMemoryBuffer::FakeGpuMemoryBuffer(const gfx::Size& size,
gfx::BufferFormat format)
: FakeGpuMemoryBuffer(size, format, gfx::NativePixmapHandle::kNoModifier) {}
FakeGpuMemoryBuffer::FakeGpuMemoryBuffer(const gfx::Size& size,
gfx::BufferFormat format,
bool premapped,
MapCallbackController* controller)
: FakeGpuMemoryBuffer(size, format, gfx::NativePixmapHandle::kNoModifier) {
premapped_ = premapped;
map_callback_controller_ = controller;
}
FakeGpuMemoryBuffer::FakeGpuMemoryBuffer(const gfx::Size& size,
gfx::BufferFormat format,
uint64_t modifier)
: size_(size), format_(format) {
std::optional<media::VideoPixelFormat> video_pixel_format =
media::GfxBufferFormatToVideoPixelFormat(format);
CHECK(video_pixel_format);
video_pixel_format_ = *video_pixel_format;
const size_t allocation_size =
media::VideoFrame::AllocationSize(video_pixel_format_, size_);
data_ = std::vector<uint8_t>(allocation_size);
handle_.type = gfx::SHARED_MEMORY_BUFFER;
handle_.id = gfx::GpuMemoryBufferId(buffer_id_generator.GetNext());
}
FakeGpuMemoryBuffer::~FakeGpuMemoryBuffer() = default;
bool FakeGpuMemoryBuffer::Map() {
return true;
}
void FakeGpuMemoryBuffer::MapAsync(base::OnceCallback<void(bool)> result_cb) {
if (premapped_) {
std::move(result_cb).Run(true);
return;
}
map_callback_controller_->RegisterCallback(std::move(result_cb));
}
bool FakeGpuMemoryBuffer::AsyncMappingIsNonBlocking() const {
return true;
}
void* FakeGpuMemoryBuffer::memory(size_t plane) {
DCHECK_LT(plane, media::VideoFrame::NumPlanes(video_pixel_format_));
auto* data_ptr = data_.data();
for (size_t i = 1; i <= plane; i++) {
data_ptr += media::VideoFrame::PlaneSize(video_pixel_format_, i - 1, size_)
.GetArea();
}
return data_ptr;
}
void FakeGpuMemoryBuffer::Unmap() {}
gfx::Size FakeGpuMemoryBuffer::GetSize() const {
return size_;
}
gfx::BufferFormat FakeGpuMemoryBuffer::GetFormat() const {
return format_;
}
int FakeGpuMemoryBuffer::stride(size_t plane) const {
DCHECK_LT(plane, media::VideoFrame::NumPlanes(video_pixel_format_));
return media::VideoFrame::PlaneSize(video_pixel_format_, plane, size_)
.width();
}
gfx::GpuMemoryBufferId FakeGpuMemoryBuffer::GetId() const {
return handle_.id;
}
gfx::GpuMemoryBufferType FakeGpuMemoryBuffer::GetType() const {
return gfx::SHARED_MEMORY_BUFFER;
}
gfx::GpuMemoryBufferHandle FakeGpuMemoryBuffer::CloneHandle() const {
return handle_.Clone();
}
void FakeGpuMemoryBuffer::OnMemoryDump(
base::trace_event::ProcessMemoryDump* pmd,
const base::trace_event::MemoryAllocatorDumpGuid& buffer_dump_guid,
uint64_t tracing_process_id,
int importance) const {}
} // namespace gpu
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