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Diffstat (limited to 'kolourpaint/pixmapfx/kpeffectblursharpen.cpp')
| -rw-r--r-- | kolourpaint/pixmapfx/kpeffectblursharpen.cpp | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/kolourpaint/pixmapfx/kpeffectblursharpen.cpp b/kolourpaint/pixmapfx/kpeffectblursharpen.cpp new file mode 100644 index 00000000..50c0b27d --- /dev/null +++ b/kolourpaint/pixmapfx/kpeffectblursharpen.cpp @@ -0,0 +1,291 @@ + +/* + Copyright (c) 2003,2004,2005 Clarence Dang <dang@kde.org> + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +#define DEBUG_KP_EFFECT_BLUR_SHARPEN 0 + + +#include <kpeffectblursharpen.h> + +#include <qimage.h> +#include <qlabel.h> +#include <qlayout.h> +#include <qpixmap.h> +#include <qpushbutton.h> + +#include <kdebug.h> +#include <kimageeffect.h> +#include <klocale.h> +#include <knuminput.h> + +#include <kpmainwindow.h> +#include <kppixmapfx.h> + + +static QString nameForType (kpEffectBlurSharpenCommand::Type type) +{ + if (type == kpEffectBlurSharpenCommand::Blur) + return i18n ("Soften"); + else if (type == kpEffectBlurSharpenCommand::Sharpen) + return i18n ("Sharpen"); + else + return QString::null; +} + + +kpEffectBlurSharpenCommand::kpEffectBlurSharpenCommand (Type type, + double radius, double sigma, + int repeat, + bool actOnSelection, + kpMainWindow *mainWindow) + : kpColorEffectCommand (::nameForType (type), actOnSelection, mainWindow), + m_type (type), + m_radius (radius), m_sigma (sigma), + m_repeat (repeat) +{ +} + +kpEffectBlurSharpenCommand::~kpEffectBlurSharpenCommand () +{ +} + + +// public static +QPixmap kpEffectBlurSharpenCommand::apply (const QPixmap &pixmap, + Type type, double radius, double sigma, + int repeat) +{ +#if DEBUG_KP_EFFECT_BLUR_SHARPEN + kdDebug () << "kpEffectBlurSharpenCommand::apply(type=" + << int (type) + << " radius=" << radius + << " sigma=" << sigma + << " repeat=" << repeat + << ")" + << endl; +#endif + + // (KImageEffect::(blur|sharpen)() ignores mask) + QPixmap usePixmap = kpPixmapFX::pixmapWithDefinedTransparentPixels ( + pixmap, + Qt::white/*arbitrarily chosen*/); + + + QImage image = kpPixmapFX::convertToImage (usePixmap); + + for (int i = 0; i < repeat; i++) + { + if (type == Blur) + image = KImageEffect::blur (image, radius, sigma); + else if (type == Sharpen) + image = KImageEffect::sharpen (image, radius, sigma); + } + + QPixmap retPixmap = kpPixmapFX::convertToPixmap (image); + + + // KImageEffect::(blur|sharpen)() nukes mask - restore it + if (usePixmap.mask ()) + retPixmap.setMask (*usePixmap.mask ()); + + + return retPixmap; +} + +// protected virtual [base kpColorEffectCommand] +QPixmap kpEffectBlurSharpenCommand::applyColorEffect (const QPixmap &pixmap) +{ + return apply (pixmap, m_type, m_radius, m_sigma, m_repeat); +} + + + +kpEffectBlurSharpenWidget::kpEffectBlurSharpenWidget (bool actOnSelection, + kpMainWindow *mainWindow, + QWidget *parent, const char *name) + : kpColorEffectWidget (actOnSelection, mainWindow, parent, name) +{ + QGridLayout *lay = new QGridLayout (this, 4, 2, marginHint (), spacingHint ()); + + + QLabel *amountLabel = new QLabel (i18n ("&Amount:"), this); + m_amountInput = new KIntNumInput (this); + m_amountInput->setRange (-10, 10, 1/*step*/, true/*slider*/); + + m_typeLabel = new QLabel (this); + + + amountLabel->setBuddy (m_amountInput); + + + lay->addWidget (amountLabel, 0, 0); + lay->addWidget (m_amountInput, 0, 1); + + lay->addMultiCellWidget (m_typeLabel, 1, 1, 0, 1, Qt::AlignCenter); + + lay->setColStretch (1, 1); + + + connect (m_amountInput, SIGNAL (valueChanged (int)), + this, SIGNAL (settingsChangedDelayed ())); + + connect (m_amountInput, SIGNAL (valueChanged (int)), + this, SLOT (slotUpdateTypeLabel ())); +} + +kpEffectBlurSharpenWidget::~kpEffectBlurSharpenWidget () +{ +} + + +// public virtual [base kpColorEffectWidget] +QString kpEffectBlurSharpenWidget::caption () const +{ + return QString::null; +} + + +// public virtual [base kpColorEffectWidget] +bool kpEffectBlurSharpenWidget::isNoOp () const +{ + return (type () == kpEffectBlurSharpenCommand::None); +} + +// public virtual [base kpColorEffectWidget] +QPixmap kpEffectBlurSharpenWidget::applyColorEffect (const QPixmap &pixmap) +{ + return kpEffectBlurSharpenCommand::apply (pixmap, + type (), radius (), sigma (), repeat ()); +} + +// public virtual [base kpColorEffectWidget] +kpColorEffectCommand *kpEffectBlurSharpenWidget::createCommand () const +{ + return new kpEffectBlurSharpenCommand (type (), radius (), sigma (), repeat (), + m_actOnSelection, + m_mainWindow); +} + + +// protected slot +void kpEffectBlurSharpenWidget::slotUpdateTypeLabel () +{ + QString text = ::nameForType (type ()); + +#if DEBUG_KP_EFFECT_BLUR_SHARPEN + kdDebug () << "kpEffectBlurSharpenWidget::slotUpdateTypeLabel() text=" + << text << endl; +#endif + m_typeLabel->setText (text); +} + + +// protected +kpEffectBlurSharpenCommand::Type kpEffectBlurSharpenWidget::type () const +{ + if (m_amountInput->value () == 0) + return kpEffectBlurSharpenCommand::None; + else if (m_amountInput->value () < 0) + return kpEffectBlurSharpenCommand::Blur; + else + return kpEffectBlurSharpenCommand::Sharpen; +} + +// The numbers that follow were picked by experimentation. +// I still have no idea what "radius" and "sigma" mean +// (even after reading the API). + +// protected +double kpEffectBlurSharpenWidget::radius () const +{ + if (m_amountInput->value () == 0) + return 0; + + if (m_amountInput->value () < 0) + { + return 8; + } + else + { + const double SharpenMin = .1; + const double SharpenMax = 2.5; + + return SharpenMin + + (m_amountInput->value () - 1) * + (SharpenMax - SharpenMin) / + (m_amountInput->maxValue () - 1); + } +} + +// protected +double kpEffectBlurSharpenWidget::sigma () const +{ + if (m_amountInput->value () == 0) + return 0; + + if (m_amountInput->value () < 0) + { + const double BlurMin = .5; + const double BlurMax = 4; + + return BlurMin + + (-m_amountInput->value () - 1) * + (BlurMax - BlurMin) / + (-m_amountInput->minValue () - 1); + } + else + { + const double SharpenMin = .5; + const double SharpenMax = 3.0; + + return SharpenMin + + (m_amountInput->value () - 1) * + (SharpenMax - SharpenMin) / + (m_amountInput->maxValue () - 1); + } +} + +// protected +int kpEffectBlurSharpenWidget::repeat () const +{ + if (m_amountInput->value () == 0) + return 0; + + if (m_amountInput->value () < 0) + return 1; + else + { + const double SharpenMin = 1; + const double SharpenMax = 2; + + return qRound (SharpenMin + + (m_amountInput->value () - 1) * + (SharpenMax - SharpenMin) / + (m_amountInput->maxValue () - 1)); + } +} + +#include <kpeffectblursharpen.moc> |