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// Copyright 2014 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 "gpu/ipc/client/gpu_memory_buffer_impl_shared_memory.h"
#include <stdint.h>
#include <utility>
#include "base/bind.h"
#include "base/memory/ptr_util.h"
#include "base/numerics/safe_math.h"
#include "base/process/memory.h"
#include "ui/gfx/buffer_format_util.h"
#include "ui/gfx/gpu_memory_buffer_tracing.h"
#include "ui/gl/gl_bindings.h"
namespace gpu {
GpuMemoryBufferImplSharedMemory::GpuMemoryBufferImplSharedMemory(
gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format,
const DestructionCallback& callback,
std::unique_ptr<base::SharedMemory> shared_memory,
size_t offset,
int stride)
: GpuMemoryBufferImpl(id, size, format, callback),
shared_memory_(std::move(shared_memory)),
offset_(offset),
stride_(stride) {
DCHECK(IsSizeValidForFormat(size, format));
}
GpuMemoryBufferImplSharedMemory::~GpuMemoryBufferImplSharedMemory() {}
// static
std::unique_ptr<GpuMemoryBufferImplSharedMemory>
GpuMemoryBufferImplSharedMemory::Create(gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format,
const DestructionCallback& callback) {
size_t buffer_size = 0u;
if (!gfx::BufferSizeForBufferFormatChecked(size, format, &buffer_size))
return nullptr;
std::unique_ptr<base::SharedMemory> shared_memory(new base::SharedMemory());
if (!shared_memory->CreateAndMapAnonymous(buffer_size))
return nullptr;
return base::WrapUnique(new GpuMemoryBufferImplSharedMemory(
id, size, format, callback, std::move(shared_memory), 0,
gfx::RowSizeForBufferFormat(size.width(), format, 0)));
}
// static
gfx::GpuMemoryBufferHandle
GpuMemoryBufferImplSharedMemory::CreateGpuMemoryBuffer(
gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format) {
size_t buffer_size = 0u;
if (!gfx::BufferSizeForBufferFormatChecked(size, format, &buffer_size))
return gfx::GpuMemoryBufferHandle();
base::SharedMemory shared_memory;
if (!shared_memory.CreateAnonymous(buffer_size))
return gfx::GpuMemoryBufferHandle();
gfx::GpuMemoryBufferHandle handle;
handle.type = gfx::SHARED_MEMORY_BUFFER;
handle.id = id;
handle.offset = 0;
handle.stride = static_cast<int32_t>(
gfx::RowSizeForBufferFormat(size.width(), format, 0));
handle.handle = shared_memory.TakeHandle();
return handle;
}
// static
std::unique_ptr<GpuMemoryBufferImplSharedMemory>
GpuMemoryBufferImplSharedMemory::CreateFromHandle(
const gfx::GpuMemoryBufferHandle& handle,
const gfx::Size& size,
gfx::BufferFormat format,
gfx::BufferUsage usage,
const DestructionCallback& callback) {
DCHECK(base::SharedMemory::IsHandleValid(handle.handle));
return base::WrapUnique(new GpuMemoryBufferImplSharedMemory(
handle.id, size, format, callback,
base::MakeUnique<base::SharedMemory>(handle.handle, false), handle.offset,
handle.stride));
}
// static
bool GpuMemoryBufferImplSharedMemory::IsUsageSupported(gfx::BufferUsage usage) {
switch (usage) {
case gfx::BufferUsage::GPU_READ:
case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE:
case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE_PERSISTENT:
case gfx::BufferUsage::SCANOUT_CPU_READ_WRITE:
return true;
case gfx::BufferUsage::SCANOUT:
return false;
}
NOTREACHED();
return false;
}
// static
bool GpuMemoryBufferImplSharedMemory::IsConfigurationSupported(
gfx::BufferFormat format,
gfx::BufferUsage usage) {
return IsUsageSupported(usage);
}
// static
bool GpuMemoryBufferImplSharedMemory::IsSizeValidForFormat(
const gfx::Size& size,
gfx::BufferFormat format) {
switch (format) {
case gfx::BufferFormat::ATC:
case gfx::BufferFormat::ATCIA:
case gfx::BufferFormat::DXT1:
case gfx::BufferFormat::DXT5:
case gfx::BufferFormat::ETC1:
// Compressed images must have a width and height that's evenly divisible
// by the block size.
return size.width() % 4 == 0 && size.height() % 4 == 0;
case gfx::BufferFormat::R_8:
case gfx::BufferFormat::R_16:
case gfx::BufferFormat::RG_88:
case gfx::BufferFormat::BGR_565:
case gfx::BufferFormat::RGBA_4444:
case gfx::BufferFormat::RGBA_8888:
case gfx::BufferFormat::RGBX_8888:
case gfx::BufferFormat::BGRA_8888:
case gfx::BufferFormat::BGRX_8888:
case gfx::BufferFormat::RGBA_F16:
return true;
case gfx::BufferFormat::YVU_420:
case gfx::BufferFormat::YUV_420_BIPLANAR: {
size_t num_planes = gfx::NumberOfPlanesForBufferFormat(format);
for (size_t i = 0; i < num_planes; ++i) {
size_t factor = gfx::SubsamplingFactorForBufferFormat(format, i);
if (size.width() % factor || size.height() % factor)
return false;
}
return true;
}
case gfx::BufferFormat::UYVY_422:
return size.width() % 2 == 0;
}
NOTREACHED();
return false;
}
// static
base::Closure GpuMemoryBufferImplSharedMemory::AllocateForTesting(
const gfx::Size& size,
gfx::BufferFormat format,
gfx::BufferUsage usage,
gfx::GpuMemoryBufferHandle* handle) {
*handle = CreateGpuMemoryBuffer(handle->id, size, format);
return base::Bind(&base::DoNothing);
}
bool GpuMemoryBufferImplSharedMemory::Map() {
DCHECK(!mapped_);
// Map the buffer first time Map() is called then keep it mapped for the
// lifetime of the buffer. This avoids mapping the buffer unless necessary.
if (!shared_memory_->memory()) {
DCHECK_EQ(static_cast<size_t>(stride_),
gfx::RowSizeForBufferFormat(size_.width(), format_, 0));
size_t buffer_size = gfx::BufferSizeForBufferFormat(size_, format_);
// Note: offset_ != 0 is not common use-case. To keep it simple we
// map offset + buffer_size here but this can be avoided using MapAt().
size_t map_size = offset_ + buffer_size;
if (!shared_memory_->Map(map_size))
base::TerminateBecauseOutOfMemory(map_size);
}
mapped_ = true;
return true;
}
void* GpuMemoryBufferImplSharedMemory::memory(size_t plane) {
DCHECK(mapped_);
DCHECK_LT(plane, gfx::NumberOfPlanesForBufferFormat(format_));
return reinterpret_cast<uint8_t*>(shared_memory_->memory()) + offset_ +
gfx::BufferOffsetForBufferFormat(size_, format_, plane);
}
void GpuMemoryBufferImplSharedMemory::Unmap() {
DCHECK(mapped_);
mapped_ = false;
}
int GpuMemoryBufferImplSharedMemory::stride(size_t plane) const {
DCHECK_LT(plane, gfx::NumberOfPlanesForBufferFormat(format_));
return gfx::RowSizeForBufferFormat(size_.width(), format_, plane);
}
gfx::GpuMemoryBufferHandle GpuMemoryBufferImplSharedMemory::GetHandle() const {
gfx::GpuMemoryBufferHandle handle;
handle.type = gfx::SHARED_MEMORY_BUFFER;
handle.id = id_;
handle.offset = offset_;
handle.stride = stride_;
handle.handle = shared_memory_->handle();
return handle;
}
base::trace_event::MemoryAllocatorDumpGuid
GpuMemoryBufferImplSharedMemory::GetGUIDForTracing(
uint64_t tracing_process_id) const {
return gfx::GetSharedMemoryGUIDForTracing(tracing_process_id, id_);
}
} // namespace gpu
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