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93 lines
2.8 KiB
93 lines
2.8 KiB
/*
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* Copyright (c) 2004 Cyrille Berger <cberger@cberger.net>
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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 <math.h>
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#include <kdebug.h>
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#include <kis_global.h>
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#include <kis_image.h>
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#include <kis_iterators_pixel.h>
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#include <kis_layer.h>
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#include <kis_paint_device.h>
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#include <kis_painter.h>
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#include <kis_types.h>
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#include "kis_wet_colorspace.h"
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#include "kis_texture_painter.h"
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KisTexturePainter::KisTexturePainter()
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: super()
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{
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// XXX make at least one of these configurable, probably blurh
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m_height = 1;
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m_blurh = 0.7;
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}
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KisTexturePainter::KisTexturePainter(KisPaintDeviceSP device) : super(device)
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{
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m_height = 1;
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m_blurh = 0.7;
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}
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void KisTexturePainter::createTexture( TQ_INT32 x, TQ_INT32 y, TQ_INT32 w, TQ_INT32 h)
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{
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double hscale = 128 * m_height / RAND_MAX;
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int ibh = (int) floor(256 * m_blurh + 0.5);
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// initialize with random data
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for (int y2 = 0; y2 < h; y2++) {
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KisHLineIterator i = m_device->createHLineIterator(x, y + y2, w, true);
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while (!i.isDone()) {
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WetPack* pack = reinterpret_cast<WetPack*>(i.rawData());
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WetPix* w = &(pack->adsorb);
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w->h = ( TQ_UINT16)floor(128 + hscale * rand());
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++i;
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}
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}
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int lh;
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// Blur horizontally
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for (int y2 = 0; y2 < h; y2++) {
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KisHLineIterator i = m_device->createHLineIterator(x, y + y2, w, true);
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WetPack* pack = reinterpret_cast<WetPack*>(i.rawData());
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WetPix* w = &(pack->adsorb);
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lh = w->h;
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++i;
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while (!i.isDone()) {
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pack = reinterpret_cast<WetPack*>(i.rawData());
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w = &(pack->adsorb);
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w->h += ((lh - w->h) * ibh + 128) >> 8;
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lh = w->h;
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// XXX to make it easier for us later on, we store the height data in paint
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// as well!
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w = &(pack->paint);
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w->h = lh;
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++i;
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}
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}
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// Vertical blurring was commented out in wetdreams, the effect seems to be achievable
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// without this.
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// I think this is because with blur in one direction, you get more the effect of
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// having 'fibers' in your paper
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}
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