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/*
* Copyright (c) 2005 Boudewijn Rempt <boud@valdyas.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <tqrect.h>
#include <kdebug.h>
#include "kis_brush.h"
#include "kis_global.h"
#include "kis_paint_device.h"
#include "kis_painter.h"
#include "kis_types.h"
#include "kis_paintop.h"
#include "kis_wsbrushop.h"
KisPaintOp * KisWSBrushOpFactory::createOp(const KisPaintOpSettings */*settings*/, KisPainter * painter)
{
KisPaintOp * op = new KisWSBrushOp(painter);
TQ_CHECK_PTR(op);
return op;
}
KisWSBrushOp::KisWSBrushOp(KisPainter * painter)
: super(painter)
{
}
KisWSBrushOp::~KisWSBrushOp()
{
}
void KisWSBrushOp::paintAt(const KisPoint &pos,
const double pressure,
const double /*xTilt*/,
const double /*yTilt*/)
{
// Painting should be implemented according to the following algorithm:
// retrieve brush
// if brush == mask
// retrieve mask
// else if brush == image
// retrieve image
// subsample (mask | image) for position -- pos should be double!
// apply filters to mask (colour | gradient | pattern | etc.
// composite filtered mask into temporary layer
// composite temporary layer into target layer
// @see: doc/brush.txt
if (!m_painter -> device()) return;
KisBrush *brush = m_painter -> brush();
Q_ASSERT(brush);
if (!brush) return;
KisPaintDeviceSP device = m_painter -> device();
KisPoint hotSpot = brush -> hotSpot(pressure);
KisPoint pt = pos - hotSpot;
// Split the coordinates into integer plus fractional parts. The integer
// is where the dab will be positioned and the fractional part determines
// the sub-pixel positioning.
TQ_INT32 x;
double xFraction;
TQ_INT32 y;
double yFraction;
splitCoordinate(pt.x(), &x, &xFraction);
splitCoordinate(pt.y(), &y, &yFraction);
KisLayerSP dab = 0;
if (brush -> brushType() == IMAGE || brush -> brushType() == PIPE_IMAGE) {
dab = brush -> image(device -> colorSpace(), pressure, xFraction, yFraction);
}
else {
KisAlphaMaskSP mask = brush -> mask(pressure, xFraction, yFraction);
dab = computeDab(mask);
}
m_painter -> setPressure(pressure);
TQRect dabRect = TQRect(0, 0, brush -> maskWidth(pressure), brush -> maskHeight(pressure));
TQRect dstRect = TQRect(x, y, dabRect.width(), dabRect.height());
KisImage * image = device -> image();
if (image != 0) {
dstRect &= image -> bounds();
}
if (dstRect.isNull() || dstRect.isEmpty() || !dstRect.isValid()) return;
TQ_INT32 sx = dstRect.x() - x;
TQ_INT32 sy = dstRect.y() - y;
TQ_INT32 sw = dstRect.width();
TQ_INT32 sh = dstRect.height();
m_painter -> bltSelection(dstRect.x(), dstRect.y(), m_painter -> compositeOp(), dab.data(), m_painter -> opacity(), sx, sy, sw, sh);
m_painter -> addDirtyRect(dstRect);
}
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