158 lines
5.8 KiB
C++
158 lines
5.8 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "gfx2DGlue.h"
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#include "YCbCrUtils.h"
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#include "yuv_convert.h"
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#include "ycbcr_to_rgb565.h"
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namespace mozilla {
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namespace gfx {
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void
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GetYCbCrToRGBDestFormatAndSize(const layers::PlanarYCbCrData& aData,
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SurfaceFormat& aSuggestedFormat,
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IntSize& aSuggestedSize)
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{
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YUVType yuvtype =
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TypeFromSize(aData.mYSize.width,
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aData.mYSize.height,
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aData.mCbCrSize.width,
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aData.mCbCrSize.height);
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// 'prescale' is true if the scaling is to be done as part of the
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// YCbCr to RGB conversion rather than on the RGB data when rendered.
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bool prescale = aSuggestedSize.width > 0 && aSuggestedSize.height > 0 &&
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aSuggestedSize != aData.mPicSize;
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if (aSuggestedFormat == SurfaceFormat::R5G6B5_UINT16) {
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#if defined(HAVE_YCBCR_TO_RGB565)
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if (prescale &&
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!IsScaleYCbCrToRGB565Fast(aData.mPicX,
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aData.mPicY,
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aData.mPicSize.width,
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aData.mPicSize.height,
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aSuggestedSize.width,
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aSuggestedSize.height,
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yuvtype,
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FILTER_BILINEAR) &&
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IsConvertYCbCrToRGB565Fast(aData.mPicX,
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aData.mPicY,
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aData.mPicSize.width,
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aData.mPicSize.height,
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yuvtype)) {
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prescale = false;
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}
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#else
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// yuv2rgb16 function not available
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aSuggestedFormat = SurfaceFormat::B8G8R8X8;
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#endif
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}
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else if (aSuggestedFormat != SurfaceFormat::B8G8R8X8) {
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// No other formats are currently supported.
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aSuggestedFormat = SurfaceFormat::B8G8R8X8;
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}
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if (aSuggestedFormat == SurfaceFormat::B8G8R8X8) {
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/* ScaleYCbCrToRGB32 does not support a picture offset, nor 4:4:4 data.
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See bugs 639415 and 640073. */
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if (aData.mPicX != 0 || aData.mPicY != 0 || yuvtype == YV24)
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prescale = false;
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}
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if (!prescale) {
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aSuggestedSize = aData.mPicSize;
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}
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}
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void
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ConvertYCbCrToRGB(const layers::PlanarYCbCrData& aData,
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const SurfaceFormat& aDestFormat,
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const IntSize& aDestSize,
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unsigned char* aDestBuffer,
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int32_t aStride)
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{
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// ConvertYCbCrToRGB et al. assume the chroma planes are rounded up if the
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// luma plane is odd sized.
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MOZ_ASSERT((aData.mCbCrSize.width == aData.mYSize.width ||
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aData.mCbCrSize.width == (aData.mYSize.width + 1) >> 1) &&
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(aData.mCbCrSize.height == aData.mYSize.height ||
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aData.mCbCrSize.height == (aData.mYSize.height + 1) >> 1));
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YUVType yuvtype =
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TypeFromSize(aData.mYSize.width,
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aData.mYSize.height,
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aData.mCbCrSize.width,
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aData.mCbCrSize.height);
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// Convert from YCbCr to RGB now, scaling the image if needed.
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if (aDestSize != aData.mPicSize) {
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#if defined(HAVE_YCBCR_TO_RGB565)
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if (aDestFormat == SurfaceFormat::R5G6B5_UINT16) {
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ScaleYCbCrToRGB565(aData.mYChannel,
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aData.mCbChannel,
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aData.mCrChannel,
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aDestBuffer,
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aData.mPicX,
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aData.mPicY,
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aData.mPicSize.width,
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aData.mPicSize.height,
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aDestSize.width,
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aDestSize.height,
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aData.mYStride,
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aData.mCbCrStride,
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aStride,
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yuvtype,
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FILTER_BILINEAR);
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} else
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#endif
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ScaleYCbCrToRGB32(aData.mYChannel, //
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aData.mCbChannel,
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aData.mCrChannel,
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aDestBuffer,
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aData.mPicSize.width,
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aData.mPicSize.height,
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aDestSize.width,
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aDestSize.height,
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aData.mYStride,
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aData.mCbCrStride,
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aStride,
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yuvtype,
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aData.mYUVColorSpace,
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FILTER_BILINEAR);
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} else { // no prescale
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#if defined(HAVE_YCBCR_TO_RGB565)
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if (aDestFormat == SurfaceFormat::R5G6B5_UINT16) {
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ConvertYCbCrToRGB565(aData.mYChannel,
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aData.mCbChannel,
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aData.mCrChannel,
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aDestBuffer,
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aData.mPicX,
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aData.mPicY,
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aData.mPicSize.width,
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aData.mPicSize.height,
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aData.mYStride,
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aData.mCbCrStride,
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aStride,
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yuvtype);
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} else // aDestFormat != SurfaceFormat::R5G6B5_UINT16
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#endif
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ConvertYCbCrToRGB32(aData.mYChannel, //
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aData.mCbChannel,
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aData.mCrChannel,
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aDestBuffer,
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aData.mPicX,
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aData.mPicY,
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aData.mPicSize.width,
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aData.mPicSize.height,
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aData.mYStride,
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aData.mCbCrStride,
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aStride,
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yuvtype,
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aData.mYUVColorSpace);
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}
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}
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} // namespace gfx
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} // namespace mozilla
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