Commit b1729958 authored by Silvio Heinrich's avatar Silvio Heinrich
Browse files

Added preliminary dissolve blending mode.

parent 842c28e5
* Copyright (c) 2011 Silvio Heinrich <>
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
#include <KoCompositeOp.h>
#include <KoColorSpaceMaths.h>
template<class Traits>
class KoCompositeOpDissolve: public KoCompositeOp
typedef typename Traits::channels_type channels_type;
static const qint32 channels_nb = Traits::channels_nb;
static const qint32 alpha_pos = Traits::alpha_pos;
inline static quint8 getRandomValue(quint32 i)
static const quint8 randomValues[256] =
0x50, 0xAD, 0x7D, 0xA9, 0x10, 0x75, 0xCA, 0x57, 0xE2, 0x06, 0x77, 0x39, 0xD9, 0xFA, 0x5C, 0x24,
0xEB, 0x1A, 0x6F, 0x15, 0xE7, 0x8B, 0x11, 0x71, 0xF0, 0xB9, 0x44, 0x8A, 0x27, 0x5E, 0xA1, 0x6A,
0x47, 0x94, 0x03, 0xD5, 0xB7, 0x56, 0xEF, 0x45, 0xED, 0xBE, 0xE8, 0xB2, 0x4C, 0x0D, 0x65, 0x9E,
0x55, 0xD7, 0x30, 0x0F, 0x52, 0xA6, 0x4D, 0x86, 0xAF, 0x66, 0x33, 0x6B, 0x3E, 0x89, 0xBD, 0xFB,
0x00, 0xC4, 0x36, 0xFC, 0x8D, 0x4E, 0x19, 0x3F, 0x91, 0xC1, 0x40, 0x14, 0x67, 0x80, 0x17, 0x3A,
0xF2, 0xB4, 0xD1, 0xFF, 0x35, 0xA7, 0xF7, 0x1C, 0x84, 0x2A, 0xBF, 0x46, 0xC6, 0x2B, 0x98, 0x41,
0xF4, 0xB8, 0xA0, 0x78, 0x5A, 0xBC, 0x3B, 0x62, 0xB6, 0x7A, 0x2E, 0x07, 0x8F, 0x4A, 0xAB, 0x2F,
0x79, 0x54, 0x81, 0x69, 0x18, 0x4F, 0xA5, 0x21, 0xD3, 0x26, 0x7C, 0x9F, 0xCF, 0xB0, 0x34, 0xCC,
0x8C, 0xAA, 0xDB, 0x32, 0xE5, 0x1F, 0x7B, 0x37, 0x64, 0x0A, 0xF9, 0x63, 0xF5, 0x38, 0x13, 0xA2,
0x12, 0xF6, 0xC9, 0x5D, 0xDF, 0xC7, 0x97, 0xC0, 0x51, 0xE1, 0x9A, 0x58, 0x76, 0xC3, 0x83, 0xC2,
0x04, 0x22, 0x60, 0x9D, 0xF1, 0x5F, 0xEC, 0x6D, 0x4B, 0xE0, 0x6C, 0xD8, 0xAC, 0x25, 0xA8, 0x1E,
0x96, 0x7E, 0x49, 0x61, 0xCD, 0x0E, 0xE3, 0xC5, 0x7F, 0x5B, 0x05, 0x6E, 0xBA, 0x0C, 0x8E, 0xF8,
0x82, 0xDA, 0x72, 0x01, 0x23, 0x9B, 0xD2, 0x99, 0xE9, 0xC8, 0xB1, 0x28, 0xD4, 0xAE, 0x48, 0xFD,
0x95, 0x2C, 0xE4, 0x93, 0x09, 0x3D, 0x70, 0x85, 0x43, 0x20, 0xBB, 0xDE, 0x90, 0xB3, 0x3C, 0xDD,
0xA3, 0x73, 0x9C, 0x16, 0xDC, 0x42, 0xEA, 0x74, 0x92, 0xE6, 0xCB, 0x53, 0x08, 0xEE, 0x59, 0x02,
0xF3, 0x29, 0xFE, 0xA4, 0x1B, 0xD6, 0x87, 0xB5, 0xCE, 0x1D, 0x68, 0x88, 0x31, 0x0B, 0x2D, 0xD0
return randomValues[i];
KoCompositeOpDissolve(const KoColorSpace* cs, const QString& category, bool userVisible=true)
: KoCompositeOp(cs, COMPOSITE_DISSOLVE, i18n("Dissolve"), category, userVisible) { }
using KoCompositeOp::composite;
virtual void composite(quint8* dstRowStart , qint32 dstRowStride ,
const quint8* srcRowStart , qint32 srcRowStride ,
const quint8* maskRowStart, qint32 maskRowStride,
qint32 rows, qint32 cols, quint8 U8_opacity, const QBitArray& channelFlags) const {
const QBitArray& flags = channelFlags.isEmpty() ? QBitArray(channels_nb,true) : channelFlags;
bool alphaLocked = (alpha_pos != -1) && !flags.testBit(alpha_pos);
using namespace Arithmetic;
// quint32 ctr = quint32(reinterpret_cast<quint64>(dstRowStart) % 256);
qint32 srcInc = (srcRowStride == 0) ? 0 : channels_nb;
bool useMask = maskRowStart != 0;
channels_type unitValue = KoColorSpaceMathsTraits<channels_type>::unitValue;
channels_type opacity = KoColorSpaceMaths<quint8,channels_type>::scaleToA(U8_opacity);
for(; rows>0; --rows) {
const channels_type* src = reinterpret_cast<const channels_type*>(srcRowStart);
channels_type* dst = reinterpret_cast<channels_type*>(dstRowStart);
const quint8* mask = maskRowStart;
for(qint32 c=cols; c>0; --c) {
channels_type srcAlpha = (alpha_pos == -1) ? unitValue : src[alpha_pos];
channels_type dstAlpha = (alpha_pos == -1) ? unitValue : dst[alpha_pos];
channels_type blend = useMask ? mul(opacity, scale<channels_type>(*mask), srcAlpha) : mul(opacity, srcAlpha);
// if(getRandomValue(ctr) <= scale<quint8>(blend) && blend != KoColorSpaceMathsTraits<channels_type>::zeroValue) {
if((qrand() % 256) <= scale<quint8>(blend) && blend != KoColorSpaceMathsTraits<channels_type>::zeroValue) {
for(qint32 i=0; i <channels_nb; i++) {
if(i != alpha_pos && flags.testBit(i))
dst[i] = src[i];
if(alpha_pos != -1)
dst[alpha_pos] = alphaLocked ? dstAlpha : unitValue;
src += srcInc;
dst += channels_nb;
// ctr = (ctr + 1) % 256;
srcRowStart += srcRowStride;
dstRowStart += dstRowStride;
maskRowStart += maskRowStride;
......@@ -33,6 +33,7 @@
#include "compositeops/KoCompositeOpErase.h"
#include "compositeops/KoCompositeOpCopy2.h"
#include "compositeops/KoCompositeOpAtop.h"
#include "compositeops/KoCompositeOpDissolve.h"
// #include "compositeops/KoCompositeOpAdd.h"
// #include "compositeops/KoCompositeOpBurn.h"
// #include "compositeops/KoCompositeOpDivide.h"
......@@ -71,6 +72,7 @@ struct AddGeneralOps<Traits, true>
cs->addCompositeOp(new KoCompositeOpCopy2<Traits>(cs));
cs->addCompositeOp(new KoCompositeOpErase<Traits>(cs));
cs->addCompositeOp(new KoCompositeOpAtop<Traits>(cs, KoCompositeOp::categoryMix()));
cs->addCompositeOp(new KoCompositeOpDissolve<Traits>(cs, KoCompositeOp::categoryMix()));
add<&cfGrainMerge> (cs, COMPOSITE_GRAIN_MERGE , i18n("Grain Merge") , KoCompositeOp::categoryMix());
add<&cfGrainExtract>(cs, COMPOSITE_GRAIN_EXTRACT, i18n("Grain Extract"), KoCompositeOp::categoryMix());
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