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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "ImageDataSerializer.h"
#include "gfx2DGlue.h" // for SurfaceFormatToImageFormat
#include "mozilla/gfx/Point.h" // for IntSize
#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
#include "mozilla/gfx/2D.h" // for DataSourceSurface, Factory
#include "mozilla/gfx/Logging.h" // for gfxDebug
#include "mozilla/gfx/Tools.h" // for GetAlignedStride, etc
#include "mozilla/gfx/Types.h"
#include "mozilla/mozalloc.h" // for operator delete, etc
#include "YCbCrUtils.h" // for YCbCr conversions
namespace mozilla {
namespace layers {
namespace ImageDataSerializer {
using namespace gfx;
int32_t
ComputeRGBStride(SurfaceFormat aFormat, int32_t aWidth)
{
return GetAlignedStride<4>(aWidth, BytesPerPixel(aFormat));
}
int32_t
GetRGBStride(const RGBDescriptor& aDescriptor)
{
return ComputeRGBStride(aDescriptor.format(), aDescriptor.size().width);
}
uint32_t
ComputeRGBBufferSize(IntSize aSize, SurfaceFormat aFormat)
{
MOZ_ASSERT(aSize.height >= 0 && aSize.width >= 0);
// This takes care of checking whether there could be overflow
// with enough margin for the metadata.
if (!gfx::Factory::AllowedSurfaceSize(aSize)) {
return 0;
}
// Note we're passing height instad of the bpp parameter, but the end
// result is the same - and the bpp was already taken care of in the
// ComputeRGBStride function.
int32_t bufsize = GetAlignedStride<16>(ComputeRGBStride(aFormat, aSize.width),
aSize.height);
if (bufsize < 0) {
// This should not be possible thanks to Factory::AllowedSurfaceSize
return 0;
}
return bufsize;
}
// Minimum required shmem size in bytes
uint32_t
ComputeYCbCrBufferSize(const gfx::IntSize& aYSize, int32_t aYStride,
const gfx::IntSize& aCbCrSize, int32_t aCbCrStride)
{
MOZ_ASSERT(aYSize.height >= 0 && aYSize.width >= 0);
if (aYSize.height < 0 || aYSize.width < 0 || aCbCrSize.height < 0 || aCbCrSize.width < 0 ||
!gfx::Factory::AllowedSurfaceSize(IntSize(aYStride, aYSize.height)) ||
!gfx::Factory::AllowedSurfaceSize(IntSize(aCbCrStride, aCbCrSize.height))) {
return 0;
}
// Overflow checks are performed in AllowedSurfaceSize
return GetAlignedStride<4>(aYSize.height, aYStride) +
2 * GetAlignedStride<4>(aCbCrSize.height, aCbCrStride);
}
// Minimum required shmem size in bytes
uint32_t
ComputeYCbCrBufferSize(const gfx::IntSize& aYSize, const gfx::IntSize& aCbCrSize)
{
return ComputeYCbCrBufferSize(aYSize, aYSize.width, aCbCrSize, aCbCrSize.width);
}
uint32_t
ComputeYCbCrBufferSize(uint32_t aBufferSize)
{
return GetAlignedStride<4>(aBufferSize, 1);
}
void ComputeYCbCrOffsets(int32_t yStride, int32_t yHeight,
int32_t cbCrStride, int32_t cbCrHeight,
uint32_t& outYOffset, uint32_t& outCbOffset,
uint32_t& outCrOffset)
{
outYOffset = 0;
outCbOffset = outYOffset + GetAlignedStride<4>(yStride, yHeight);
outCrOffset = outCbOffset + GetAlignedStride<4>(cbCrStride, cbCrHeight);
}
gfx::SurfaceFormat FormatFromBufferDescriptor(const BufferDescriptor& aDescriptor)
{
switch (aDescriptor.type()) {
case BufferDescriptor::TRGBDescriptor:
return aDescriptor.get_RGBDescriptor().format();
case BufferDescriptor::TYCbCrDescriptor:
return gfx::SurfaceFormat::YUV;
default:
MOZ_CRASH("GFX: FormatFromBufferDescriptor");
}
}
gfx::IntSize SizeFromBufferDescriptor(const BufferDescriptor& aDescriptor)
{
switch (aDescriptor.type()) {
case BufferDescriptor::TRGBDescriptor:
return aDescriptor.get_RGBDescriptor().size();
case BufferDescriptor::TYCbCrDescriptor:
return aDescriptor.get_YCbCrDescriptor().ySize();
default:
MOZ_CRASH("GFX: SizeFromBufferDescriptor");
}
}
Maybe<gfx::IntSize> CbCrSizeFromBufferDescriptor(const BufferDescriptor& aDescriptor)
{
switch (aDescriptor.type()) {
case BufferDescriptor::TRGBDescriptor:
return Nothing();
case BufferDescriptor::TYCbCrDescriptor:
return Some(aDescriptor.get_YCbCrDescriptor().cbCrSize());
default:
MOZ_CRASH("GFX: CbCrSizeFromBufferDescriptor");
}
}
Maybe<YUVColorSpace> YUVColorSpaceFromBufferDescriptor(const BufferDescriptor& aDescriptor)
{
{
switch (aDescriptor.type()) {
case BufferDescriptor::TRGBDescriptor:
return Nothing();
case BufferDescriptor::TYCbCrDescriptor:
return Some(aDescriptor.get_YCbCrDescriptor().yUVColorSpace());
default:
MOZ_CRASH("GFX: CbCrSizeFromBufferDescriptor");
}
}
}
Maybe<StereoMode> StereoModeFromBufferDescriptor(const BufferDescriptor& aDescriptor)
{
switch (aDescriptor.type()) {
case BufferDescriptor::TRGBDescriptor:
return Nothing();
case BufferDescriptor::TYCbCrDescriptor:
return Some(aDescriptor.get_YCbCrDescriptor().stereoMode());
default:
MOZ_CRASH("GFX: CbCrSizeFromBufferDescriptor");
}
}
uint8_t* GetYChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor)
{
return aBuffer + aDescriptor.yOffset();
}
uint8_t* GetCbChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor)
{
return aBuffer + aDescriptor.cbOffset();
}
uint8_t* GetCrChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor)
{
return aBuffer + aDescriptor.crOffset();
}
already_AddRefed<DataSourceSurface>
DataSourceSurfaceFromYCbCrDescriptor(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor, gfx::DataSourceSurface* aSurface)
{
gfx::IntSize ySize = aDescriptor.ySize();
gfx::IntSize cbCrSize = aDescriptor.cbCrSize();
int32_t yStride = ySize.width;
int32_t cbCrStride = cbCrSize.width;
RefPtr<DataSourceSurface> result;
if (aSurface) {
MOZ_ASSERT(aSurface->GetSize() == ySize);
MOZ_ASSERT(aSurface->GetFormat() == gfx::SurfaceFormat::B8G8R8X8);
if (aSurface->GetSize() == ySize &&
aSurface->GetFormat() == gfx::SurfaceFormat::B8G8R8X8) {
result = aSurface;
}
}
if (!result) {
result =
Factory::CreateDataSourceSurface(ySize, gfx::SurfaceFormat::B8G8R8X8);
}
if (NS_WARN_IF(!result)) {
return nullptr;
}
DataSourceSurface::MappedSurface map;
if (NS_WARN_IF(!result->Map(DataSourceSurface::MapType::WRITE, &map))) {
return nullptr;
}
layers::PlanarYCbCrData ycbcrData;
ycbcrData.mYChannel = GetYChannel(aBuffer, aDescriptor);
ycbcrData.mYStride = yStride;
ycbcrData.mYSize = ySize;
ycbcrData.mCbChannel = GetCbChannel(aBuffer, aDescriptor);
ycbcrData.mCrChannel = GetCrChannel(aBuffer, aDescriptor);
ycbcrData.mCbCrStride = cbCrStride;
ycbcrData.mCbCrSize = cbCrSize;
ycbcrData.mPicSize = ySize;
ycbcrData.mYUVColorSpace = aDescriptor.yUVColorSpace();
gfx::ConvertYCbCrToRGB(ycbcrData,
gfx::SurfaceFormat::B8G8R8X8,
ySize,
map.mData,
map.mStride);
result->Unmap();
return result.forget();
}
void
ConvertAndScaleFromYCbCrDescriptor(uint8_t* aBuffer,
const YCbCrDescriptor& aDescriptor,
const gfx::SurfaceFormat& aDestFormat,
const gfx::IntSize& aDestSize,
unsigned char* aDestBuffer,
int32_t aStride)
{
MOZ_ASSERT(aBuffer);
gfx::IntSize ySize = aDescriptor.ySize();
gfx::IntSize cbCrSize = aDescriptor.cbCrSize();
int32_t yStride = ySize.width;
int32_t cbCrStride = cbCrSize.width;
layers::PlanarYCbCrData ycbcrData;
ycbcrData.mYChannel = GetYChannel(aBuffer, aDescriptor);
ycbcrData.mYStride = yStride;
ycbcrData.mYSize = ySize;
ycbcrData.mCbChannel = GetCbChannel(aBuffer, aDescriptor);
ycbcrData.mCrChannel = GetCrChannel(aBuffer, aDescriptor);
ycbcrData.mCbCrStride = cbCrStride;
ycbcrData.mCbCrSize = cbCrSize;
ycbcrData.mPicSize = ySize;
ycbcrData.mYUVColorSpace = aDescriptor.yUVColorSpace();
gfx::ConvertYCbCrToRGB(ycbcrData, aDestFormat, aDestSize, aDestBuffer, aStride);
}
} // namespace ImageDataSerializer
} // namespace layers
} // namespace mozilla
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