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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 <tqcheckbox.h>
#include <kdebug.h>
#include <kis_brush.h>
#include <kis_debug_areas.h>
#include <kis_paint_device.h>
#include <kis_painter.h>
#include <kis_types.h>
#include <kis_paintop.h>
#include <kis_iterators_pixel.h>
#include <kis_layer.h>
#include <kis_meta_registry.h>
#include <kis_colorspace_factory_registry.h>
#include "kis_input_device.h"
#include "kis_wetop.h"
#include "kis_wet_colorspace.h"
KisWetOpSettings::KisWetOpSettings(TQWidget *parent)
: super(parent)
{
m_options = new WetPaintOptions(parent, "wet option widget");
}
bool KisWetOpSettings::varySize() const
{
return m_options->checkSize->isChecked();
}
bool KisWetOpSettings::varyWetness() const
{
return m_options->checkWetness->isChecked();
}
bool KisWetOpSettings::varyStrength() const
{
return m_options->checkStrength->isChecked();
}
KisPaintOp * KisWetOpFactory::createOp(const KisPaintOpSettings *settings, KisPainter * painter)
{
const KisWetOpSettings *wetopSettings = dynamic_cast<const KisWetOpSettings *>(settings);
Q_ASSERT(settings == 0 || wetopSettings != 0);
KisPaintOp * op = new KisWetOp(wetopSettings, painter);
TQ_CHECK_PTR(op);
return op;
}
KisPaintOpSettings* KisWetOpFactory::settings(TQWidget * parent, const KisInputDevice& inputDevice)
{
if (inputDevice == KisInputDevice::mouse()) {
// No options for mouse, only tablet devices
return 0;
} else {
return new KisWetOpSettings(parent);
}
}
KisWetOp::KisWetOp(const KisWetOpSettings * settings, KisPainter * painter)
: super(painter)
{
if (settings) {
m_size = settings->varySize();
m_wetness = settings->varyWetness();
m_strength = settings->varyStrength();
} else {
m_size = false;
m_wetness = false;
m_strength = false;
}
}
KisWetOp::~KisWetOp()
{
}
void KisWetOp::paintAt(const KisPoint &pos, const KisPaintInformation& info)
{
if (!m_painter) return;
if (!m_painter->device()) return;
KisPaintDeviceSP device = m_painter->device();
if (!m_painter->device()) return;
KisBrush *brush = m_painter->brush();
Q_ASSERT(brush);
if (! brush->canPaintFor(info) )
return;
KisPaintInformation inf(info);
if (!m_size)
inf.pressure = PRESSURE_DEFAULT;
KisPaintDeviceSP dab = 0;
if (brush->brushType() == IMAGE || brush->brushType() == PIPE_IMAGE) {
dab = brush->image(KisMetaRegistry::instance()->csRegistry()->getAlpha8(), inf);
}
else {
KisAlphaMaskSP mask = brush->mask(inf);
dab = computeDab(mask, KisMetaRegistry::instance()->csRegistry()->getAlpha8());
}
KisColorSpace * cs = device->colorSpace();
if (cs->id() != KisID("WET","")) {
kdDebug(DBG_AREA_CMS) << "You cannot paint wet paint on dry pixels.\n";
return;
}
KisColor paintColor = m_painter->paintColor();
paintColor.convertTo(cs);
// hopefully this does
// nothing, conversions are bad ( wet->rgb->wet gives horrible mismatches, due to
// the conversion to rgb actually rendering the paint above white
WetPack* paintPack = reinterpret_cast<WetPack*>(paintColor.data());
WetPix paint = paintPack->paint;
// Get the paint info (we store the strength in the otherwise unused (?) height field of
// the paint
// double wetness = paint.w; // XXX: Was unused
// strength is a double in the 0 - 2 range, but upscaled to TQ_UINT16:
//kdDebug() << "Original strength as in paint.h: " << paint.h << endl;
double strength = 2.0 * static_cast<double>(paint.h) / (double)(0xffff);
//kdDebug() << "Before strength: " << strength << endl;
if (m_strength)
strength = strength * (strength + info.pressure) * 0.5;
else
strength = strength * (strength + PRESSURE_DEFAULT) * 0.5;
double pressure = 0.75 + 0.25 * info.pressure;
//kdDebug() << "info.pressure " << info.pressure << ", local pressure: " << pressure << ", strength: " << strength << endl;
WetPack currentPack;
WetPix currentPix;
double eff_height;
double press, contact;
int maskW = brush->maskWidth(inf);
int maskH = brush->maskHeight(inf);
KoPoint dest = (pos - (brush->hotSpot(inf)));
int xStart = (int)dest.x();
int yStart = (int)dest.y();
for (int y = 0; y < maskH; y++) {
KisHLineIteratorPixel dabIt = dab->createHLineIterator(0, y, maskW, false);
KisHLineIteratorPixel it = device->createHLineIterator(xStart, yStart+y, maskW, true);
while (!dabIt.isDone()) {
// This only does something with .paint, and not with adsorb.
currentPack = *(reinterpret_cast<WetPack*>(it.rawData()));
WetPix currentData = currentPack.adsorb;
currentPix = currentPack.paint;
// Hardcoded threshold for the dab 'strength': above it, it will get painted
if (*dabIt.rawData() > 125)
press = pressure * 0.25;
else
press = -1;
//kdDebug() << "After mysterious line, press becomes: " << press << ", this is the same as in the orignal. Good" << endl;
// XXX - 192 is probably only useful for paper with a texture...
eff_height = (currentData.h + currentData.w - 192.0) * (1.0 / 255.0);
contact = (press + eff_height) * 0.2;
double old_contact = contact;
if (contact > 0.5)
contact = 1.0 - 0.5 * exp(-2.0 * contact - 1.0);
//kdDebug() << "Contact was " << old_contact << " and has become: " << contact << endl;
if (contact > 0.0001) {
int v;
double rnd = rand() * (1.0 / RAND_MAX);
v = currentPix.rd;
currentPix.rd = floor(v + (paint.rd * strength - v) * contact + rnd);
//kdDebug() << "Rd was " << v << " and has become " << currentPix.rd << endl;
v = currentPix.rw;
currentPix.rw = floor(v + (paint.rw * strength - v) * contact + rnd);
v = currentPix.gd;
currentPix.gd = floor(v + (paint.gd * strength - v) * contact + rnd);
v = currentPix.gw;
currentPix.gw = floor(v + (paint.gw * strength - v) * contact + rnd);
v = currentPix.bd;
currentPix.bd = floor(v + (paint.bd * strength - v) * contact + rnd);
v = currentPix.bw;
currentPix.bw = floor(v + (paint.bw * strength - v) * contact + rnd);
v = currentPix.w;
if (m_wetness)
currentPix.w = (CLAMP(floor(
v + (paint.w * (0.5 + pressure) - v) * contact + rnd), 0, 512));
else
currentPix.w = floor(v + (paint.w - v) * contact + rnd);
currentPack.paint = currentPix;
*(reinterpret_cast<WetPack*>(it.rawData())) = currentPack;
}
++dabIt;
++it;
}
}
m_painter->addDirtyRect(TQRect(xStart, yStart, maskW, maskH));
}
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