File indexing completed on 2025-03-09 04:08:37 

0001 /*
0002  *  SPDX-FileCopyrightText: 2006 Boudewijn Rempt <boud@valdyas.org>
0003  *
0004  *  SPDX-License-Identifier: LGPL-2.1-or-later
0005  */
0006 
0007 #ifndef RGBCOMPOSITEOPBUMPMAP_H
0008 #define RGBCOMPOSITEOPBUMPMAP_H
0009 
0010 #include <KoCompositeOpAlphaBase.h>
0011 
0012 template<class _CSTraits>
0013 class RgbCompositeOpBumpmap : public KoCompositeOpAlphaBase<_CSTraits, RgbCompositeOpBumpmap<_CSTraits>, true >
0014 {
0015     typedef typename _CSTraits::channels_type channels_type;
0016     typedef typename KoColorSpaceMathsTraits<typename _CSTraits::channels_type>::compositetype compositetype;
0017 
0018 public:
0019 
0020     RgbCompositeOpBumpmap(KoColorSpace *cs)
0021         : KoCompositeOpAlphaBase<_CSTraits, RgbCompositeOpBumpmap<_CSTraits>, true >(cs, COMPOSITE_BUMPMAP, KoCompositeOp::categoryMisc())
0022     {
0023     }
0024 
0025     inline static channels_type selectAlpha(channels_type srcAlpha, channels_type dstAlpha)
0026     {
0027         return qMin(srcAlpha, dstAlpha);
0028     }
0029 
0030     inline static void composeColorChannels(channels_type srcBlend,
0031                                             const channels_type *src,
0032                                             channels_type *dst,
0033                                             bool allChannelFlags,
0034                                             const QBitArray &channelFlags)
0035     {
0036         qreal intensity;
0037 
0038         // And I'm not sure whether this is correct, either.
0039         intensity = ((qreal)306.0 * src[_CSTraits::red_pos] +
0040                      (qreal)601.0 * src[_CSTraits::green_pos] +
0041                      (qreal)117.0 * src[_CSTraits::blue_pos]) / 1024.0;
0042 
0043         for (uint i = 0; i < _CSTraits::channels_nb; i++) {
0044             if ((int)i != _CSTraits::alpha_pos  && (allChannelFlags || channelFlags.testBit(i))) {
0045                 channels_type srcChannel = (channels_type)(((qreal)
0046                                            intensity * dst[i]) / NATIVE_OPACITY_OPAQUE + 0.5);
0047                 channels_type dstChannel = dst[i];
0048 
0049                 dst[i] = KoColorSpaceMaths<channels_type>::blend(srcChannel, dstChannel, srcBlend);
0050             }
0051         }
0052     }
0053 
0054 };
0055 
0056 #endif