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// Copyright 2013 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 "content/common/gpu/client/gpu_memory_buffer_impl.h"
#include "base/logging.h"
#include "base/numerics/safe_math.h"
#include "content/common/gpu/client/gpu_memory_buffer_impl_shared_memory.h"
#include "ui/gfx/buffer_format_util.h"
#include "ui/gl/gl_bindings.h"
#if defined(OS_MACOSX)
#include "content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h"
#endif
#if defined(OS_ANDROID)
#include "content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.h"
#endif
#if defined(USE_OZONE)
#include "content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.h"
#endif
namespace content {
GpuMemoryBufferImpl::GpuMemoryBufferImpl(gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format,
const DestructionCallback& callback)
: id_(id),
size_(size),
format_(format),
callback_(callback),
mapped_(false),
destruction_sync_point_(0) {}
GpuMemoryBufferImpl::~GpuMemoryBufferImpl() {
DCHECK(!mapped_);
callback_.Run(destruction_sync_point_);
}
// static
scoped_ptr<GpuMemoryBufferImpl> GpuMemoryBufferImpl::CreateFromHandle(
const gfx::GpuMemoryBufferHandle& handle,
const gfx::Size& size,
gfx::BufferFormat format,
gfx::BufferUsage usage,
const DestructionCallback& callback) {
switch (handle.type) {
case gfx::SHARED_MEMORY_BUFFER:
return GpuMemoryBufferImplSharedMemory::CreateFromHandle(
handle, size, format, callback);
#if defined(OS_MACOSX)
case gfx::IO_SURFACE_BUFFER:
return GpuMemoryBufferImplIOSurface::CreateFromHandle(
handle, size, format, usage, callback);
#endif
#if defined(OS_ANDROID)
case gfx::SURFACE_TEXTURE_BUFFER:
return GpuMemoryBufferImplSurfaceTexture::CreateFromHandle(
handle, size, format, callback);
#endif
#if defined(USE_OZONE)
case gfx::OZONE_NATIVE_PIXMAP:
return GpuMemoryBufferImplOzoneNativePixmap::CreateFromHandle(
handle, size, format, usage, callback);
#endif
default:
NOTREACHED();
return nullptr;
}
}
// static
GpuMemoryBufferImpl* GpuMemoryBufferImpl::FromClientBuffer(
ClientBuffer buffer) {
return reinterpret_cast<GpuMemoryBufferImpl*>(buffer);
}
// static
size_t GpuMemoryBufferImpl::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;
}
// static
bool GpuMemoryBufferImpl::RowSizeInBytes(size_t width,
gfx::BufferFormat format,
int plane,
size_t* size_in_bytes) {
base::CheckedNumeric<size_t> checked_size = width;
switch (format) {
case gfx::BufferFormat::ATCIA:
case gfx::BufferFormat::DXT5:
DCHECK_EQ(plane, 0);
*size_in_bytes = width;
return true;
case gfx::BufferFormat::ATC:
case gfx::BufferFormat::DXT1:
case gfx::BufferFormat::ETC1:
DCHECK_EQ(plane, 0);
DCHECK_EQ(width % 2, 0u);
*size_in_bytes = width / 2;
return true;
case gfx::BufferFormat::R_8:
checked_size += 3;
if (!checked_size.IsValid())
return false;
*size_in_bytes = checked_size.ValueOrDie() & ~0x3;
return true;
case gfx::BufferFormat::RGBA_4444:
checked_size *= 2;
if (!checked_size.IsValid())
return false;
*size_in_bytes = checked_size.ValueOrDie();
case gfx::BufferFormat::RGBX_8888:
case gfx::BufferFormat::RGBA_8888:
case gfx::BufferFormat::BGRA_8888:
checked_size *= 4;
if (!checked_size.IsValid())
return false;
*size_in_bytes = checked_size.ValueOrDie();
return true;
case gfx::BufferFormat::YUV_420:
DCHECK_EQ(width % 2, 0u);
*size_in_bytes = width / SubsamplingFactor(format, plane);
return true;
}
NOTREACHED();
return false;
}
// static
bool GpuMemoryBufferImpl::BufferSizeInBytes(const gfx::Size& size,
gfx::BufferFormat format,
size_t* size_in_bytes) {
base::CheckedNumeric<size_t> checked_size = 0;
size_t num_planes = gfx::NumberOfPlanesForBufferFormat(format);
for (size_t i = 0; i < num_planes; ++i) {
size_t row_size_in_bytes = 0;
if (!RowSizeInBytes(size.width(), format, i, &row_size_in_bytes))
return false;
base::CheckedNumeric<size_t> checked_plane_size = row_size_in_bytes;
checked_plane_size *= size.height() / SubsamplingFactor(format, i);
if (!checked_plane_size.IsValid())
return false;
checked_size += checked_plane_size.ValueOrDie();
if (!checked_size.IsValid())
return false;
}
*size_in_bytes = checked_size.ValueOrDie();
return true;
}
gfx::BufferFormat GpuMemoryBufferImpl::GetFormat() const {
return format_;
}
bool GpuMemoryBufferImpl::IsMapped() const {
return mapped_;
}
gfx::GpuMemoryBufferId GpuMemoryBufferImpl::GetId() const {
return id_;
}
ClientBuffer GpuMemoryBufferImpl::AsClientBuffer() {
return reinterpret_cast<ClientBuffer>(this);
}
} // namespace content
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