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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 "cc/test/test_gpu_memory_buffer_manager.h"
#include "base/logging.h"
#include "base/numerics/safe_conversions.h"
#include "ui/gfx/buffer_format_util.h"
#include "ui/gfx/gpu_memory_buffer.h"
namespace cc {
namespace {
size_t SubsamplingFactor(gfx::BufferFormat format, int plane) {
switch (format) {
case gfx::BufferFormat::ATC:
case gfx::BufferFormat::ATCIA:
case gfx::BufferFormat::DXT1:
case gfx::BufferFormat::DXT5:
case gfx::BufferFormat::ETC1:
case gfx::BufferFormat::R_8:
case gfx::BufferFormat::RGBA_4444:
case gfx::BufferFormat::RGBA_8888:
case gfx::BufferFormat::RGBX_8888:
case gfx::BufferFormat::BGRA_8888:
return 1;
case gfx::BufferFormat::YUV_420: {
static size_t factor[] = {1, 2, 2};
DCHECK_LT(static_cast<size_t>(plane), arraysize(factor));
return factor[plane];
}
}
NOTREACHED();
return 0;
}
size_t StrideInBytes(size_t width, gfx::BufferFormat format, int plane) {
switch (format) {
case gfx::BufferFormat::ATCIA:
case gfx::BufferFormat::DXT5:
DCHECK_EQ(plane, 0);
return width;
case gfx::BufferFormat::ATC:
case gfx::BufferFormat::DXT1:
case gfx::BufferFormat::ETC1:
DCHECK_EQ(plane, 0);
DCHECK_EQ(width % 2, 0u);
return width / 2;
case gfx::BufferFormat::R_8:
return (width + 3) & ~0x3;
case gfx::BufferFormat::RGBA_4444:
DCHECK_EQ(plane, 0);
return width * 2;
case gfx::BufferFormat::RGBA_8888:
case gfx::BufferFormat::RGBX_8888:
case gfx::BufferFormat::BGRA_8888:
DCHECK_EQ(plane, 0);
return width * 4;
case gfx::BufferFormat::YUV_420:
return width / SubsamplingFactor(format, plane);
}
NOTREACHED();
return 0;
}
size_t BufferSizeInBytes(const gfx::Size& size, gfx::BufferFormat format) {
size_t size_in_bytes = 0;
int num_planes = static_cast<int>(gfx::NumberOfPlanesForBufferFormat(format));
for (int i = 0; i < num_planes; ++i) {
size_in_bytes += StrideInBytes(size.width(), format, i) *
(size.height() / SubsamplingFactor(format, i));
}
return size_in_bytes;
}
class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
public:
GpuMemoryBufferImpl(const gfx::Size& size,
gfx::BufferFormat format,
scoped_ptr<base::SharedMemory> shared_memory)
: size_(size),
format_(format),
shared_memory_(shared_memory.Pass()),
mapped_(false) {}
// Overridden from gfx::GpuMemoryBuffer:
bool Map(void** data) override {
DCHECK(!mapped_);
if (!shared_memory_->Map(BufferSizeInBytes(size_, format_)))
return false;
mapped_ = true;
size_t offset = 0;
int num_planes =
static_cast<int>(gfx::NumberOfPlanesForBufferFormat(format_));
for (int i = 0; i < num_planes; ++i) {
data[i] = reinterpret_cast<uint8*>(shared_memory_->memory()) + offset;
offset += StrideInBytes(size_.width(), format_, i) *
(size_.height() / SubsamplingFactor(format_, i));
}
return true;
}
void Unmap() override {
DCHECK(mapped_);
shared_memory_->Unmap();
mapped_ = false;
}
bool IsMapped() const override { return mapped_; }
gfx::BufferFormat GetFormat() const override { return format_; }
void GetStride(int* stride) const override {
int num_planes =
static_cast<int>(gfx::NumberOfPlanesForBufferFormat(format_));
for (int i = 0; i < num_planes; ++i)
stride[i] =
base::checked_cast<int>(StrideInBytes(size_.width(), format_, i));
}
gfx::GpuMemoryBufferId GetId() const override {
NOTREACHED();
return 0;
}
gfx::GpuMemoryBufferHandle GetHandle() const override {
gfx::GpuMemoryBufferHandle handle;
handle.type = gfx::SHARED_MEMORY_BUFFER;
handle.handle = shared_memory_->handle();
return handle;
}
ClientBuffer AsClientBuffer() override {
return reinterpret_cast<ClientBuffer>(this);
}
private:
const gfx::Size size_;
gfx::BufferFormat format_;
scoped_ptr<base::SharedMemory> shared_memory_;
bool mapped_;
};
} // namespace
TestGpuMemoryBufferManager::TestGpuMemoryBufferManager() {
}
TestGpuMemoryBufferManager::~TestGpuMemoryBufferManager() {
}
scoped_ptr<gfx::GpuMemoryBuffer>
TestGpuMemoryBufferManager::AllocateGpuMemoryBuffer(const gfx::Size& size,
gfx::BufferFormat format,
gfx::BufferUsage usage) {
scoped_ptr<base::SharedMemory> shared_memory(new base::SharedMemory);
if (!shared_memory->CreateAnonymous(BufferSizeInBytes(size, format)))
return nullptr;
return make_scoped_ptr<gfx::GpuMemoryBuffer>(
new GpuMemoryBufferImpl(size, format, shared_memory.Pass()));
}
gfx::GpuMemoryBuffer*
TestGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
ClientBuffer buffer) {
return reinterpret_cast<gfx::GpuMemoryBuffer*>(buffer);
}
void TestGpuMemoryBufferManager::SetDestructionSyncPoint(
gfx::GpuMemoryBuffer* buffer,
uint32 sync_point) {
}
} // namespace cc
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