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297 lines
8.6 KiB
297 lines
8.6 KiB
/*
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* Copyright (c) 2004 Boudewijn Rempt <boud@valdyas.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <limits.h>
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#include <stdlib.h>
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#include <tqimage.h>
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#include <kdebug.h>
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#include <klocale.h>
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#include <config.h>
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#include LCMS_HEADER
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#include "kis_alpha_colorspace.h"
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#include "kis_u8_base_colorspace.h"
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#include "kis_channelinfo.h"
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#include "kis_id.h"
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#include "kis_integer_maths.h"
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namespace {
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const TQ_UINT8 PIXEL_MASK = 0;
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}
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KisAlphaColorSpace::KisAlphaColorSpace(KisColorSpaceFactoryRegistry * tqparent,
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KisProfile *p) :
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KisU8BaseColorSpace(KisID("ALPHA", i18n("Alpha tqmask")), TYPE_GRAY_8, icSigGrayData, tqparent, p)
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{
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m_channels.push_back(new KisChannelInfo(i18n("Alpha"), i18n("A"), 0, KisChannelInfo::ALPHA, KisChannelInfo::UINT8));
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m_alphaPos = 0;
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}
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KisAlphaColorSpace::~KisAlphaColorSpace()
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{
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}
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void KisAlphaColorSpace::fromTQColor(const TQColor& /*c*/, TQ_UINT8 *dst, KisProfile * /*profile*/)
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{
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dst[PIXEL_MASK] = OPACITY_OPAQUE;
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}
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void KisAlphaColorSpace::fromTQColor(const TQColor& /*c*/, TQ_UINT8 opacity, TQ_UINT8 *dst, KisProfile * /*profile*/)
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{
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dst[PIXEL_MASK] = opacity;
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}
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void KisAlphaColorSpace::getAlpha(const TQ_UINT8 *pixel, TQ_UINT8 *alpha) const
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{
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*alpha = *pixel;
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}
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void KisAlphaColorSpace::toTQColor(const TQ_UINT8 */*src*/, TQColor *c, KisProfile * /*profile*/)
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{
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c->setRgb(255, 255, 255);
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}
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void KisAlphaColorSpace::toTQColor(const TQ_UINT8 *src, TQColor *c, TQ_UINT8 *opacity, KisProfile * /*profile*/)
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{
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c->setRgb(255, 255, 255);
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*opacity = src[PIXEL_MASK];
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}
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TQ_UINT8 KisAlphaColorSpace::difference(const TQ_UINT8 *src1, const TQ_UINT8 *src2)
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{
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// Arithmetic operands smaller than int are converted to int automatically
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return TQABS(src2[PIXEL_MASK] - src1[PIXEL_MASK]);
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}
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void KisAlphaColorSpace::mixColors(const TQ_UINT8 **colors, const TQ_UINT8 *weights, TQ_UINT32 nColors, TQ_UINT8 *dst) const
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{
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if (nColors > 0) {
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TQ_UINT32 total = 0;
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while(nColors)
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{
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nColors--;
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total += *colors[nColors] * weights[nColors];
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}
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*dst = total / 255;
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}
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}
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TQValueVector<KisChannelInfo *> KisAlphaColorSpace::channels() const
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{
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return m_channels;
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}
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bool KisAlphaColorSpace::convertPixelsTo(const TQ_UINT8 *src,
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TQ_UINT8 *dst, KisAbstractColorSpace * dstColorSpace,
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TQ_UINT32 numPixels,
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TQ_INT32 /*renderingIntent*/)
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{
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// No lcms trickery here, we are only a opacity channel
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TQ_INT32 size = dstColorSpace->pixelSize();
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TQ_UINT32 j = 0;
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TQ_UINT32 i = 0;
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while ( i < numPixels ) {
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dstColorSpace->fromTQColor(TQt::red, OPACITY_OPAQUE - *(src + i), (dst + j));
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i += 1;
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j += size;
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}
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return true;
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}
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//XXX bitblt of ColorSpaceAlpha does not take tqmask into consideration as this is probably not
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// used ever
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void KisAlphaColorSpace::bitBlt(TQ_UINT8 *dst,
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TQ_INT32 dststride,
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const TQ_UINT8 *src,
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TQ_INT32 srcRowStride,
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const TQ_UINT8 *srcAlphaMask,
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TQ_INT32 maskRowStride,
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TQ_UINT8 opacity,
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TQ_INT32 rows,
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TQ_INT32 cols,
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const KisCompositeOp& op)
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{
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TQ_UINT8 *d;
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const TQ_UINT8 *s;
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TQ_INT32 i;
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TQ_INT32 linesize;
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if (rows <= 0 || cols <= 0)
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return;
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switch (op.op()) {
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case COMPOSITE_COPY:
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compositeCopy(dst, dststride, src, srcRowStride, srcAlphaMask, maskRowStride, rows, cols, opacity);
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return;
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case COMPOSITE_CLEAR:
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linesize = sizeof(TQ_UINT8) * cols;
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d = dst;
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while (rows-- > 0) {
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memset(d, OPACITY_TRANSPARENT, linesize);
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d += dststride;
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}
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return;
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case COMPOSITE_ERASE:
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while (rows-- > 0) {
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d = dst;
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s = src;
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for (i = cols; i > 0; i--, d ++, s ++) {
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if (d[PIXEL_MASK] < s[PIXEL_MASK]) {
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continue;
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}
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else {
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d[PIXEL_MASK] = s[PIXEL_MASK];
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}
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}
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dst += dststride;
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src += srcRowStride;
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}
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return;
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case COMPOSITE_SUBTRACT:
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while (rows-- > 0) {
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d = dst;
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s = src;
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for (i = cols; i > 0; i--, d++, s++) {
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if (d[PIXEL_MASK] <= s[PIXEL_MASK]) {
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d[PIXEL_MASK] = MIN_SELECTED;
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} else {
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d[PIXEL_MASK] -= s[PIXEL_MASK];
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}
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}
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dst += dststride;
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src += srcRowStride;
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}
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return;
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case COMPOSITE_ALPHA_DARKEN:
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while (rows-- > 0) {
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d = dst;
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s = src;
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for (i = cols; i > 0; i--, d++, s++) {
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if (s[PIXEL_MASK] == OPACITY_TRANSPARENT)
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continue;
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int srcAlpha = (s[PIXEL_MASK] * opacity + UINT8_MAX / 2) / UINT8_MAX;
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if (srcAlpha > d[PIXEL_MASK])
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d[PIXEL_MASK] = srcAlpha;
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}
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dst += dststride;
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src += srcRowStride;
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}
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return;
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case COMPOSITE_OVER:
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default:
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if (opacity == OPACITY_TRANSPARENT)
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return;
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if (opacity != OPACITY_OPAQUE) {
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while (rows-- > 0) {
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d = dst;
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s = src;
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for (i = cols; i > 0; i--, d++, s++) {
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if (s[PIXEL_MASK] == OPACITY_TRANSPARENT)
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continue;
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int srcAlpha = (s[PIXEL_MASK] * opacity + UINT8_MAX / 2) / UINT8_MAX;
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d[PIXEL_MASK] = (d[PIXEL_MASK] * (UINT8_MAX - srcAlpha) + srcAlpha * UINT8_MAX + UINT8_MAX / 2) / UINT8_MAX;
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}
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dst += dststride;
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src += srcRowStride;
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}
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}
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else {
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while (rows-- > 0) {
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d = dst;
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s = src;
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for (i = cols; i > 0; i--, d++, s++) {
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if (s[PIXEL_MASK] == OPACITY_TRANSPARENT)
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continue;
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if (d[PIXEL_MASK] == OPACITY_TRANSPARENT || s[PIXEL_MASK] == OPACITY_OPAQUE) {
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memcpy(d, s, 1);
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continue;
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}
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int srcAlpha = s[PIXEL_MASK];
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d[PIXEL_MASK] = (d[PIXEL_MASK] * (UINT8_MAX - srcAlpha) + srcAlpha * UINT8_MAX + UINT8_MAX / 2) / UINT8_MAX;
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}
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dst += dststride;
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src += srcRowStride;
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}
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}
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}
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}
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KisCompositeOpList KisAlphaColorSpace::userVisiblecompositeOps() const
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{
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KisCompositeOpList list;
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list.append(KisCompositeOp(COMPOSITE_OVER));
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return list;
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}
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TQString KisAlphaColorSpace::channelValueText(const TQ_UINT8 *pixel, TQ_UINT32 channelIndex) const
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{
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Q_ASSERT(channelIndex < nChannels());
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TQ_UINT32 channelPosition = m_channels[channelIndex]->pos();
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return TQString().setNum(pixel[channelPosition]);
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}
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TQString KisAlphaColorSpace::normalisedChannelValueText(const TQ_UINT8 *pixel, TQ_UINT32 channelIndex) const
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{
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Q_ASSERT(channelIndex < nChannels());
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TQ_UINT32 channelPosition = m_channels[channelIndex]->pos();
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return TQString().setNum(static_cast<float>(pixel[channelPosition]) / UINT8_MAX);
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}
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void KisAlphaColorSpace::convolveColors(TQ_UINT8** colors, TQ_INT32 * kernelValues, KisChannelInfo::enumChannelFlags channelFlags, TQ_UINT8 *dst, TQ_INT32 factor, TQ_INT32 offset, TQ_INT32 nColors) const
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{
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TQ_INT32 totalAlpha = 0;
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while (nColors--)
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{
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TQ_INT32 weight = *kernelValues;
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if (weight != 0) {
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totalAlpha += (*colors)[PIXEL_MASK] * weight;
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}
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colors++;
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kernelValues++;
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}
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if (channelFlags & KisChannelInfo::FLAG_ALPHA) {
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dst[PIXEL_MASK] = CLAMP((totalAlpha/ factor) + offset, 0, TQ_UINT8_MAX);
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}
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}
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