1 files changed, 284 insertions, 0 deletions
diff --git a/chalk/plugins/paintops/defaultpaintops/kis_brushop.cpp b/chalk/plugins/paintops/defaultpaintops/kis_brushop.cpp
new file mode 100644
index 000000000..285b4d6fc
--- /dev/null
+++ b/chalk/plugins/paintops/defaultpaintops/kis_brushop.cpp
@@ -0,0 +1,284 @@
+/*
+ *  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);
+    TQ_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->setSizePolicy(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"