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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* 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 "gfx2DGlue.h"
#include "YCbCrUtils.h"
#include "yuv_convert.h"
#include "ycbcr_to_rgb565.h"
namespace mozilla {
namespace gfx {
void
GetYCbCrToRGBDestFormatAndSize(const layers::PlanarYCbCrData& aData,
SurfaceFormat& aSuggestedFormat,
IntSize& aSuggestedSize)
{
YUVType yuvtype =
TypeFromSize(aData.mYSize.width,
aData.mYSize.height,
aData.mCbCrSize.width,
aData.mCbCrSize.height);
// 'prescale' is true if the scaling is to be done as part of the
// YCbCr to RGB conversion rather than on the RGB data when rendered.
bool prescale = aSuggestedSize.width > 0 && aSuggestedSize.height > 0 &&
aSuggestedSize != aData.mPicSize;
if (aSuggestedFormat == SurfaceFormat::R5G6B5_UINT16) {
#if defined(HAVE_YCBCR_TO_RGB565)
if (prescale &&
!IsScaleYCbCrToRGB565Fast(aData.mPicX,
aData.mPicY,
aData.mPicSize.width,
aData.mPicSize.height,
aSuggestedSize.width,
aSuggestedSize.height,
yuvtype,
FILTER_BILINEAR) &&
IsConvertYCbCrToRGB565Fast(aData.mPicX,
aData.mPicY,
aData.mPicSize.width,
aData.mPicSize.height,
yuvtype)) {
prescale = false;
}
#else
// yuv2rgb16 function not available
aSuggestedFormat = SurfaceFormat::B8G8R8X8;
#endif
}
else if (aSuggestedFormat != SurfaceFormat::B8G8R8X8) {
// No other formats are currently supported.
aSuggestedFormat = SurfaceFormat::B8G8R8X8;
}
if (aSuggestedFormat == SurfaceFormat::B8G8R8X8) {
/* ScaleYCbCrToRGB32 does not support a picture offset, nor 4:4:4 data.
See bugs 639415 and 640073. */
if (aData.mPicX != 0 || aData.mPicY != 0 || yuvtype == YV24)
prescale = false;
}
if (!prescale) {
aSuggestedSize = aData.mPicSize;
}
}
void
ConvertYCbCrToRGB(const layers::PlanarYCbCrData& aData,
const SurfaceFormat& aDestFormat,
const IntSize& aDestSize,
unsigned char* aDestBuffer,
int32_t aStride)
{
// ConvertYCbCrToRGB et al. assume the chroma planes are rounded up if the
// luma plane is odd sized.
MOZ_ASSERT((aData.mCbCrSize.width == aData.mYSize.width ||
aData.mCbCrSize.width == (aData.mYSize.width + 1) >> 1) &&
(aData.mCbCrSize.height == aData.mYSize.height ||
aData.mCbCrSize.height == (aData.mYSize.height + 1) >> 1));
YUVType yuvtype =
TypeFromSize(aData.mYSize.width,
aData.mYSize.height,
aData.mCbCrSize.width,
aData.mCbCrSize.height);
// Convert from YCbCr to RGB now, scaling the image if needed.
if (aDestSize != aData.mPicSize) {
#if defined(HAVE_YCBCR_TO_RGB565)
if (aDestFormat == SurfaceFormat::R5G6B5_UINT16) {
ScaleYCbCrToRGB565(aData.mYChannel,
aData.mCbChannel,
aData.mCrChannel,
aDestBuffer,
aData.mPicX,
aData.mPicY,
aData.mPicSize.width,
aData.mPicSize.height,
aDestSize.width,
aDestSize.height,
aData.mYStride,
aData.mCbCrStride,
aStride,
yuvtype,
FILTER_BILINEAR);
} else
#endif
ScaleYCbCrToRGB32(aData.mYChannel, //
aData.mCbChannel,
aData.mCrChannel,
aDestBuffer,
aData.mPicSize.width,
aData.mPicSize.height,
aDestSize.width,
aDestSize.height,
aData.mYStride,
aData.mCbCrStride,
aStride,
yuvtype,
aData.mYUVColorSpace,
FILTER_BILINEAR);
} else { // no prescale
#if defined(HAVE_YCBCR_TO_RGB565)
if (aDestFormat == SurfaceFormat::R5G6B5_UINT16) {
ConvertYCbCrToRGB565(aData.mYChannel,
aData.mCbChannel,
aData.mCrChannel,
aDestBuffer,
aData.mPicX,
aData.mPicY,
aData.mPicSize.width,
aData.mPicSize.height,
aData.mYStride,
aData.mCbCrStride,
aStride,
yuvtype);
} else // aDestFormat != SurfaceFormat::R5G6B5_UINT16
#endif
ConvertYCbCrToRGB32(aData.mYChannel, //
aData.mCbChannel,
aData.mCrChannel,
aDestBuffer,
aData.mPicX,
aData.mPicY,
aData.mPicSize.width,
aData.mPicSize.height,
aData.mYStride,
aData.mCbCrStride,
aStride,
yuvtype,
aData.mYUVColorSpace);
}
}
} // namespace gfx
} // namespace mozilla
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