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koffice/chalk/plugins/paintops/defaultpaintops/kis_brushop.cc

285 lines
9.3 KiB

/*
* Copyright (c) 2002 Patrick Julien <freak@codepimps.org>
* Copyright (c) 2004 Boudewijn Rempt <boud@valdyas.org>
* Copyright (c) 2004 Clarence Dang <dang@kde.org>
* Copyright (c) 2004 Adrian Page <adrian@pagenet.plus.com>
* Copyright (c) 2004 Cyrille Berger <cberger@cberger.net>
*
* 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 <string.h>
#include <tqrect.h>
#include <tqwidget.h>
#include <tqlayout.h>
#include <tqlabel.h>
#include <tqcheckbox.h>
#include <tqtoolbutton.h>
#include <kdebug.h>
#include "kcurve.h"
#include "kis_brush.h"
#include "kis_global.h"
#include "kis_paint_device.h"
#include "kis_layer.h"
#include "kis_painter.h"
#include "kis_types.h"
#include "kis_paintop.h"
#include "kis_input_device.h"
#include "kis_selection.h"
#include "kis_brushop.h"
#include "kis_dlgbrushcurvecontrol.h"
KisPaintOp * KisBrushOpFactory::createOp(const KisPaintOpSettings *settings, KisPainter * painter)
{
const KisBrushOpSettings *brushopSettings = dynamic_cast<const KisBrushOpSettings *>(settings);
Q_ASSERT(settings == 0 || brushopSettings != 0);
KisPaintOp * op = new KisBrushOp(brushopSettings, painter);
Q_CHECK_PTR(op);
return op;
}
KisBrushOpSettings::KisBrushOpSettings(TQWidget *parent)
: super(parent)
{
m_optionsWidget = new TQWidget(parent, "brush option widget");
TQHBoxLayout * l = new TQHBoxLayout(m_optionsWidget);
l->setAutoAdd(true);
m_pressureVariation = new TQLabel(i18n("Pressure variation: "), m_optionsWidget);
m_size = new TQCheckBox(i18n("Size"), m_optionsWidget);
m_size->setChecked(true);
m_opacity = new TQCheckBox(i18n("Opacity"), m_optionsWidget);
m_darken = new TQCheckBox(i18n("Darken"), m_optionsWidget);
m_curveControl = new WdgBrushCurveControl(m_optionsWidget);
TQToolButton* moreButton = new TQToolButton(TQt::UpArrow, m_optionsWidget);
moreButton->tqsetSizePolicy(TQSizePolicy::Expanding, TQSizePolicy::Expanding);
moreButton->setMinimumSize(TQSize(24,24)); // Bah, I had hoped the above line would make this unneeded
connect(moreButton, TQT_SIGNAL(clicked()), this, TQT_SLOT(slotCustomCurves()));
m_customSize = false;
m_customOpacity = false;
m_customDarken = false;
// the curves will get filled in when the slot gets accepted
}
void KisBrushOpSettings::slotCustomCurves() {
if (m_curveControl->exec() == TQDialog::Accepted) {
m_customSize = m_curveControl->sizeCheckbox->isChecked();
m_customOpacity = m_curveControl->opacityCheckbox->isChecked();
m_customDarken = m_curveControl->darkenCheckbox->isChecked();
if (m_customSize) {
transferCurve(m_curveControl->sizeCurve, m_sizeCurve);
}
if (m_customOpacity) {
transferCurve(m_curveControl->opacityCurve, m_opacityCurve);
}
if (m_customDarken) {
transferCurve(m_curveControl->darkenCurve, m_darkenCurve);
}
}
}
void KisBrushOpSettings::transferCurve(KCurve* curve, double* target) {
double value;
for (int i = 0; i < 256; i++) {
value = curve->getCurveValue( i / 255.0);
if (value < PRESSURE_MIN)
target[i] = PRESSURE_MIN;
else if (value > PRESSURE_MAX)
target[i] = PRESSURE_MAX;
else
target[i] = value;
}
}
bool KisBrushOpSettings::varySize() const
{
return m_size->isChecked();
}
bool KisBrushOpSettings::varyOpacity() const
{
return m_opacity->isChecked();
}
bool KisBrushOpSettings::varyDarken() const
{
return m_darken->isChecked();
}
KisPaintOpSettings* KisBrushOpFactory::settings(TQWidget * parent, const KisInputDevice& inputDevice)
{
if (inputDevice == KisInputDevice::mouse()) {
// No options for mouse, only tablet devices
return 0;
} else {
return new KisBrushOpSettings(parent);
}
}
KisBrushOp::KisBrushOp(const KisBrushOpSettings *settings, KisPainter *painter)
: super(painter)
, m_pressureSize(true)
, m_pressureOpacity(false)
, m_pressureDarken(false)
, m_customSize(false)
, m_customOpacity(false)
, m_customDarken(false)
{
if (settings != 0) {
m_pressureSize = settings->varySize();
painter->setVaryBrushSpacingWithPressureWhenDrawingALine( m_pressureSize );
m_pressureOpacity = settings->varyOpacity();
m_pressureDarken = settings->varyDarken();
m_customSize = settings->customSize();
m_customOpacity = settings->customOpacity();
m_customDarken = settings->customDarken();
if (m_customSize) {
memcpy(m_sizeCurve, settings->sizeCurve(), 256 * sizeof(double));
}
if (m_customOpacity) {
memcpy(m_opacityCurve, settings->opacityCurve(), 256 * sizeof(double));
}
if (m_customDarken) {
memcpy(m_darkenCurve, settings->darkenCurve(), 256 * sizeof(double));
}
}
}
KisBrushOp::~KisBrushOp()
{
m_painter->setVaryBrushSpacingWithPressureWhenDrawingALine( true );
}
void KisBrushOp::paintAt(const KisPoint &pos, const KisPaintInformation& info)
{
KisPaintInformation adjustedInfo(info);
if (!m_pressureSize)
adjustedInfo.pressure = PRESSURE_DEFAULT;
else if (m_customSize)
adjustedInfo.pressure = scaleToCurve(adjustedInfo.pressure, m_sizeCurve);
// 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;
if (! brush->canPaintFor(adjustedInfo) )
return;
KisPaintDeviceSP device = m_painter->device();
KisPoint hotSpot = brush->hotSpot(adjustedInfo);
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);
KisPaintDeviceSP dab = 0;
TQ_UINT8 origOpacity = m_painter->opacity();
KisColor origColor = m_painter->paintColor();
if (m_pressureOpacity) {
if (!m_customOpacity)
m_painter->setOpacity((TQ_INT8)(origOpacity * info.pressure));
else
m_painter->setOpacity((TQ_INT8)(origOpacity * scaleToCurve(info.pressure, m_opacityCurve)));
}
if (m_pressureDarken) {
KisColor darkened = origColor;
// Darken docs aren't really clear about what exactly the amount param can have as value...
TQ_UINT32 darkenAmount;
if (!m_customDarken)
darkenAmount = (TQ_INT32)(255 - 75 * info.pressure);
else
darkenAmount = (TQ_INT32)(255 - 75 * scaleToCurve(info.pressure, m_darkenCurve));
darkened.colorSpace()->darken(origColor.data(), darkened.data(),
darkenAmount, false, 0.0, 1);
m_painter->setPaintColor(darkened);
}
if (brush->brushType() == IMAGE || brush->brushType() == PIPE_IMAGE) {
dab = brush->image(device->colorSpace(), adjustedInfo, xFraction, yFraction);
}
else {
KisAlphaMaskSP mask = brush->mask(adjustedInfo, xFraction, yFraction);
dab = computeDab(mask);
}
m_painter->setPressure(adjustedInfo.pressure);
TQRect dabRect = TQRect(0, 0, brush->maskWidth(adjustedInfo),
brush->maskHeight(adjustedInfo));
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();
if (m_source->hasSelection()) {
m_painter->bltSelection(dstRect.x(), dstRect.y(), m_painter->compositeOp(), dab.data(),
m_source->selection(), m_painter->opacity(), sx, sy, sw, sh);
}
else {
m_painter->bitBlt(dstRect.x(), dstRect.y(), m_painter->compositeOp(), dab.data(), m_painter->opacity(), sx, sy, sw, sh);
}
m_painter->addDirtyRect(dstRect);
m_painter->setOpacity(origOpacity);
m_painter->setPaintColor(origColor);
}
#include "kis_brushop.moc"