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84 lines
2.7 KiB
84 lines
2.7 KiB
/*
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* Copyright (c) 2005 Bart Coppens <kde@bartcoppens.be>
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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 <tqpixmap.h>
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#include <tqpainter.h>
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#include "kis_colorspace.h"
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#include "kis_iterators_pixel.h"
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#include "kis_paint_device.h"
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#include "kis_boundary.h"
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KisBoundary::KisBoundary(KisPaintDevice* dev) {
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m_device = dev;
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m_fuzzyness = 255 / 2;
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}
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bool KisBoundary::isDark(TQ_UINT8 val) {
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return val < m_fuzzyness;
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}
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void KisBoundary::generateBoundary(int w, int h) {
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if (!m_device)
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return;
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KisColorSpace* cs = m_device->colorSpace();
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// Horizontal
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for (int currentY = - 1; currentY < h; currentY++) {
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KisHLineIteratorPixel topIt = m_device->createHLineIterator(0, currentY, w, false);
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KisHLineIteratorPixel botIt = m_device->createHLineIterator(0, currentY + 1, w, false);
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bool darkTop;
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bool darkBot;
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m_horSegments.append(TQValueList<PointPair>());
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while (!topIt.isDone()) {
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darkTop = cs->getAlpha(topIt.rawData());
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darkBot = cs->getAlpha(botIt.rawData());
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if (darkTop != darkBot) {
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// detected a change
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m_horSegments.back().append(tqMakePair(KisPoint(botIt.x(), botIt.y()), 1));
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}
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++topIt;
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++botIt;
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}
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}
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// Vertical
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for (int currentX = - 1; currentX < w; currentX++) {
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KisVLineIteratorPixel leftIt = m_device->createVLineIterator(currentX, 0, h, false);
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KisVLineIteratorPixel rightIt = m_device->createVLineIterator(currentX + 1, 0, h, false);
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bool darkLeft;
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bool darkRight;
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m_vertSegments.append(TQValueList<PointPair>());
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while (!leftIt.isDone()) {
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darkLeft = cs->getAlpha(leftIt.rawData());
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darkRight = cs->getAlpha(rightIt.rawData());
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if (darkLeft != darkRight) {
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// detected a change
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m_vertSegments.back().append(tqMakePair(KisPoint(rightIt.x(), rightIt.y()), 1));
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}
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++leftIt;
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++rightIt;
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}
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}
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}
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