michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "gfx2DGlue.h"
michael@0: 
michael@0: #include "YCbCrUtils.h"
michael@0: #include "yuv_convert.h"
michael@0: #include "ycbcr_to_rgb565.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gfx {
michael@0: 
michael@0: void
michael@0: GetYCbCrToRGBDestFormatAndSize(const layers::PlanarYCbCrData& aData,
michael@0:                                SurfaceFormat& aSuggestedFormat,
michael@0:                                IntSize& aSuggestedSize)
michael@0: {
michael@0:   YUVType yuvtype =
michael@0:     TypeFromSize(aData.mYSize.width,
michael@0:                  aData.mYSize.height,
michael@0:                  aData.mCbCrSize.width,
michael@0:                  aData.mCbCrSize.height);
michael@0: 
michael@0:   // 'prescale' is true if the scaling is to be done as part of the
michael@0:   // YCbCr to RGB conversion rather than on the RGB data when rendered.
michael@0:   bool prescale = aSuggestedSize.width > 0 && aSuggestedSize.height > 0 &&
michael@0:                   aSuggestedSize != aData.mPicSize;
michael@0: 
michael@0:   if (aSuggestedFormat == SurfaceFormat::R5G6B5) {
michael@0: #if defined(HAVE_YCBCR_TO_RGB565)
michael@0:     if (prescale &&
michael@0:         !IsScaleYCbCrToRGB565Fast(aData.mPicX,
michael@0:                                   aData.mPicY,
michael@0:                                   aData.mPicSize.width,
michael@0:                                   aData.mPicSize.height,
michael@0:                                   aSuggestedSize.width,
michael@0:                                   aSuggestedSize.height,
michael@0:                                   yuvtype,
michael@0:                                   FILTER_BILINEAR) &&
michael@0:         IsConvertYCbCrToRGB565Fast(aData.mPicX,
michael@0:                                    aData.mPicY,
michael@0:                                    aData.mPicSize.width,
michael@0:                                    aData.mPicSize.height,
michael@0:                                    yuvtype)) {
michael@0:       prescale = false;
michael@0:     }
michael@0: #else
michael@0:     // yuv2rgb16 function not available
michael@0:     aSuggestedFormat = SurfaceFormat::B8G8R8X8;
michael@0: #endif
michael@0:   }
michael@0:   else if (aSuggestedFormat != SurfaceFormat::B8G8R8X8) {
michael@0:     // No other formats are currently supported.
michael@0:     aSuggestedFormat = SurfaceFormat::B8G8R8X8;
michael@0:   }
michael@0:   if (aSuggestedFormat == SurfaceFormat::B8G8R8X8) {
michael@0:     /* ScaleYCbCrToRGB32 does not support a picture offset, nor 4:4:4 data.
michael@0:      See bugs 639415 and 640073. */
michael@0:     if (aData.mPicX != 0 || aData.mPicY != 0 || yuvtype == YV24)
michael@0:       prescale = false;
michael@0:   }
michael@0:   if (!prescale) {
michael@0:     aSuggestedSize = aData.mPicSize;
michael@0:   }
michael@0: }
michael@0: 
michael@0: void
michael@0: ConvertYCbCrToRGB(const layers::PlanarYCbCrData& aData,
michael@0:                   const SurfaceFormat& aDestFormat,
michael@0:                   const IntSize& aDestSize,
michael@0:                   unsigned char* aDestBuffer,
michael@0:                   int32_t aStride)
michael@0: {
michael@0:   // ConvertYCbCrToRGB et al. assume the chroma planes are rounded up if the
michael@0:   // luma plane is odd sized.
michael@0:   MOZ_ASSERT((aData.mCbCrSize.width == aData.mYSize.width ||
michael@0:               aData.mCbCrSize.width == (aData.mYSize.width + 1) >> 1) &&
michael@0:              (aData.mCbCrSize.height == aData.mYSize.height ||
michael@0:               aData.mCbCrSize.height == (aData.mYSize.height + 1) >> 1));
michael@0:   YUVType yuvtype =
michael@0:     TypeFromSize(aData.mYSize.width,
michael@0:                  aData.mYSize.height,
michael@0:                  aData.mCbCrSize.width,
michael@0:                  aData.mCbCrSize.height);
michael@0: 
michael@0:   // Convert from YCbCr to RGB now, scaling the image if needed.
michael@0:   if (aDestSize != aData.mPicSize) {
michael@0: #if defined(HAVE_YCBCR_TO_RGB565)
michael@0:     if (aDestFormat == SurfaceFormat::R5G6B5) {
michael@0:       ScaleYCbCrToRGB565(aData.mYChannel,
michael@0:                          aData.mCbChannel,
michael@0:                          aData.mCrChannel,
michael@0:                          aDestBuffer,
michael@0:                          aData.mPicX,
michael@0:                          aData.mPicY,
michael@0:                          aData.mPicSize.width,
michael@0:                          aData.mPicSize.height,
michael@0:                          aDestSize.width,
michael@0:                          aDestSize.height,
michael@0:                          aData.mYStride,
michael@0:                          aData.mCbCrStride,
michael@0:                          aStride,
michael@0:                          yuvtype,
michael@0:                          FILTER_BILINEAR);
michael@0:     } else
michael@0: #endif
michael@0:       ScaleYCbCrToRGB32(aData.mYChannel, //
michael@0:                         aData.mCbChannel,
michael@0:                         aData.mCrChannel,
michael@0:                         aDestBuffer,
michael@0:                         aData.mPicSize.width,
michael@0:                         aData.mPicSize.height,
michael@0:                         aDestSize.width,
michael@0:                         aDestSize.height,
michael@0:                         aData.mYStride,
michael@0:                         aData.mCbCrStride,
michael@0:                         aStride,
michael@0:                         yuvtype,
michael@0:                         ROTATE_0,
michael@0:                         FILTER_BILINEAR);
michael@0:   } else { // no prescale
michael@0: #if defined(HAVE_YCBCR_TO_RGB565)
michael@0:     if (aDestFormat == SurfaceFormat::R5G6B5) {
michael@0:       ConvertYCbCrToRGB565(aData.mYChannel,
michael@0:                            aData.mCbChannel,
michael@0:                            aData.mCrChannel,
michael@0:                            aDestBuffer,
michael@0:                            aData.mPicX,
michael@0:                            aData.mPicY,
michael@0:                            aData.mPicSize.width,
michael@0:                            aData.mPicSize.height,
michael@0:                            aData.mYStride,
michael@0:                            aData.mCbCrStride,
michael@0:                            aStride,
michael@0:                            yuvtype);
michael@0:     } else // aDestFormat != gfxImageFormat::RGB16_565
michael@0: #endif
michael@0:       ConvertYCbCrToRGB32(aData.mYChannel, //
michael@0:                           aData.mCbChannel,
michael@0:                           aData.mCrChannel,
michael@0:                           aDestBuffer,
michael@0:                           aData.mPicX,
michael@0:                           aData.mPicY,
michael@0:                           aData.mPicSize.width,
michael@0:                           aData.mPicSize.height,
michael@0:                           aData.mYStride,
michael@0:                           aData.mCbCrStride,
michael@0:                           aStride,
michael@0:                           yuvtype);
michael@0:   }
michael@0: }
michael@0: 
michael@0: }
michael@0: }