1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/ycbcr/YCbCrUtils.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,156 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "gfx2DGlue.h"
1.10 +
1.11 +#include "YCbCrUtils.h"
1.12 +#include "yuv_convert.h"
1.13 +#include "ycbcr_to_rgb565.h"
1.14 +
1.15 +namespace mozilla {
1.16 +namespace gfx {
1.17 +
1.18 +void
1.19 +GetYCbCrToRGBDestFormatAndSize(const layers::PlanarYCbCrData& aData,
1.20 + SurfaceFormat& aSuggestedFormat,
1.21 + IntSize& aSuggestedSize)
1.22 +{
1.23 + YUVType yuvtype =
1.24 + TypeFromSize(aData.mYSize.width,
1.25 + aData.mYSize.height,
1.26 + aData.mCbCrSize.width,
1.27 + aData.mCbCrSize.height);
1.28 +
1.29 + // 'prescale' is true if the scaling is to be done as part of the
1.30 + // YCbCr to RGB conversion rather than on the RGB data when rendered.
1.31 + bool prescale = aSuggestedSize.width > 0 && aSuggestedSize.height > 0 &&
1.32 + aSuggestedSize != aData.mPicSize;
1.33 +
1.34 + if (aSuggestedFormat == SurfaceFormat::R5G6B5) {
1.35 +#if defined(HAVE_YCBCR_TO_RGB565)
1.36 + if (prescale &&
1.37 + !IsScaleYCbCrToRGB565Fast(aData.mPicX,
1.38 + aData.mPicY,
1.39 + aData.mPicSize.width,
1.40 + aData.mPicSize.height,
1.41 + aSuggestedSize.width,
1.42 + aSuggestedSize.height,
1.43 + yuvtype,
1.44 + FILTER_BILINEAR) &&
1.45 + IsConvertYCbCrToRGB565Fast(aData.mPicX,
1.46 + aData.mPicY,
1.47 + aData.mPicSize.width,
1.48 + aData.mPicSize.height,
1.49 + yuvtype)) {
1.50 + prescale = false;
1.51 + }
1.52 +#else
1.53 + // yuv2rgb16 function not available
1.54 + aSuggestedFormat = SurfaceFormat::B8G8R8X8;
1.55 +#endif
1.56 + }
1.57 + else if (aSuggestedFormat != SurfaceFormat::B8G8R8X8) {
1.58 + // No other formats are currently supported.
1.59 + aSuggestedFormat = SurfaceFormat::B8G8R8X8;
1.60 + }
1.61 + if (aSuggestedFormat == SurfaceFormat::B8G8R8X8) {
1.62 + /* ScaleYCbCrToRGB32 does not support a picture offset, nor 4:4:4 data.
1.63 + See bugs 639415 and 640073. */
1.64 + if (aData.mPicX != 0 || aData.mPicY != 0 || yuvtype == YV24)
1.65 + prescale = false;
1.66 + }
1.67 + if (!prescale) {
1.68 + aSuggestedSize = aData.mPicSize;
1.69 + }
1.70 +}
1.71 +
1.72 +void
1.73 +ConvertYCbCrToRGB(const layers::PlanarYCbCrData& aData,
1.74 + const SurfaceFormat& aDestFormat,
1.75 + const IntSize& aDestSize,
1.76 + unsigned char* aDestBuffer,
1.77 + int32_t aStride)
1.78 +{
1.79 + // ConvertYCbCrToRGB et al. assume the chroma planes are rounded up if the
1.80 + // luma plane is odd sized.
1.81 + MOZ_ASSERT((aData.mCbCrSize.width == aData.mYSize.width ||
1.82 + aData.mCbCrSize.width == (aData.mYSize.width + 1) >> 1) &&
1.83 + (aData.mCbCrSize.height == aData.mYSize.height ||
1.84 + aData.mCbCrSize.height == (aData.mYSize.height + 1) >> 1));
1.85 + YUVType yuvtype =
1.86 + TypeFromSize(aData.mYSize.width,
1.87 + aData.mYSize.height,
1.88 + aData.mCbCrSize.width,
1.89 + aData.mCbCrSize.height);
1.90 +
1.91 + // Convert from YCbCr to RGB now, scaling the image if needed.
1.92 + if (aDestSize != aData.mPicSize) {
1.93 +#if defined(HAVE_YCBCR_TO_RGB565)
1.94 + if (aDestFormat == SurfaceFormat::R5G6B5) {
1.95 + ScaleYCbCrToRGB565(aData.mYChannel,
1.96 + aData.mCbChannel,
1.97 + aData.mCrChannel,
1.98 + aDestBuffer,
1.99 + aData.mPicX,
1.100 + aData.mPicY,
1.101 + aData.mPicSize.width,
1.102 + aData.mPicSize.height,
1.103 + aDestSize.width,
1.104 + aDestSize.height,
1.105 + aData.mYStride,
1.106 + aData.mCbCrStride,
1.107 + aStride,
1.108 + yuvtype,
1.109 + FILTER_BILINEAR);
1.110 + } else
1.111 +#endif
1.112 + ScaleYCbCrToRGB32(aData.mYChannel, //
1.113 + aData.mCbChannel,
1.114 + aData.mCrChannel,
1.115 + aDestBuffer,
1.116 + aData.mPicSize.width,
1.117 + aData.mPicSize.height,
1.118 + aDestSize.width,
1.119 + aDestSize.height,
1.120 + aData.mYStride,
1.121 + aData.mCbCrStride,
1.122 + aStride,
1.123 + yuvtype,
1.124 + ROTATE_0,
1.125 + FILTER_BILINEAR);
1.126 + } else { // no prescale
1.127 +#if defined(HAVE_YCBCR_TO_RGB565)
1.128 + if (aDestFormat == SurfaceFormat::R5G6B5) {
1.129 + ConvertYCbCrToRGB565(aData.mYChannel,
1.130 + aData.mCbChannel,
1.131 + aData.mCrChannel,
1.132 + aDestBuffer,
1.133 + aData.mPicX,
1.134 + aData.mPicY,
1.135 + aData.mPicSize.width,
1.136 + aData.mPicSize.height,
1.137 + aData.mYStride,
1.138 + aData.mCbCrStride,
1.139 + aStride,
1.140 + yuvtype);
1.141 + } else // aDestFormat != gfxImageFormat::RGB16_565
1.142 +#endif
1.143 + ConvertYCbCrToRGB32(aData.mYChannel, //
1.144 + aData.mCbChannel,
1.145 + aData.mCrChannel,
1.146 + aDestBuffer,
1.147 + aData.mPicX,
1.148 + aData.mPicY,
1.149 + aData.mPicSize.width,
1.150 + aData.mPicSize.height,
1.151 + aData.mYStride,
1.152 + aData.mCbCrStride,
1.153 + aStride,
1.154 + yuvtype);
1.155 + }
1.156 +}
1.157 +
1.158 +}
1.159 +}
