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tdegraphics/kolourpaint/pixmapfx/kpeffectbalance.cpp

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/*
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_BALANCE 0
#include <kpeffectbalance.h>
#include <math.h>
#include <tqfontmetrics.h>
#include <tqimage.h>
#include <tqlabel.h>
#include <tqlayout.h>
#include <tqpixmap.h>
#include <tqpushbutton.h>
#include <kcombobox.h>
#include <kdebug.h>
#include <kimageeffect.h>
#include <klocale.h>
#include <knuminput.h>
#include <kppixmapfx.h>
#if DEBUG_KP_EFFECT_BALANCE
#include <tqdatetime.h>
#endif
kpEffectBalanceCommand::kpEffectBalanceCommand (int channels,
int brightness, int contrast, int gamma,
bool actOnSelection,
kpMainWindow *mainWindow)
: kpColorEffectCommand (i18n ("Balance"), actOnSelection, mainWindow),
m_channels (channels),
m_brightness (brightness), m_contrast (contrast), m_gamma (gamma)
{
}
kpEffectBalanceCommand::~kpEffectBalanceCommand ()
{
}
static inline int between0And255 (int val)
{
if (val < 0)
return 0;
else if (val > 255)
return 255;
else
return val;
}
static inline int brightness (int base, int strength)
{
return between0And255 (base + strength * 255 / 50);
}
static inline int contrast (int base, int strength)
{
return between0And255 ((base - 127) * (strength + 50) / 50 + 127);
}
static inline int gamma (int base, int strength)
{
return between0And255 (qRound (255.0 * pow (base / 255.0, 1.0 / pow (10, strength / 50.0))));
}
static inline int brightnessContrastGamma (int base,
int newBrightness,
int newContrast,
int newGamma)
{
return gamma (contrast (brightness (base, newBrightness),
newContrast),
newGamma);
}
static inline QRgb brightnessContrastGammaForRGB (QRgb rgb,
int channels,
int brightness, int contrast, int gamma)
{
int red = qRed (rgb);
int green = qGreen (rgb);
int blue = qBlue (rgb);
if (channels & kpEffectBalanceCommand::Red)
red = brightnessContrastGamma (red, brightness, contrast, gamma);
if (channels & kpEffectBalanceCommand::Green)
green = brightnessContrastGamma (green, brightness, contrast, gamma);
if (channels & kpEffectBalanceCommand::Blue)
blue = brightnessContrastGamma (blue, brightness, contrast, gamma);
return qRgba (red, green, blue, qAlpha (rgb));
}
// public static
TQPixmap kpEffectBalanceCommand::applyColorEffect (const TQPixmap &pixmap,
int channels,
int brightness, int contrast, int gamma)
{
#if DEBUG_KP_EFFECT_BALANCE
kdDebug () << "kpEffectBalanceCommand::applyColorEffect("
<< "channels=" << channels
<< ",brightness=" << brightness
<< ",contrast=" << contrast
<< ",gamma=" << gamma
<< ")" << endl;
TQTime timer; timer.start ();
#endif
TQImage image = kpPixmapFX::convertToImage (pixmap);
#if DEBUG_KP_EFFECT_BALANCE
kdDebug () << "\tconvertToImage=" << timer.restart () << endl;
#endif
Q_UINT8 transformRed [256],
transformGreen [256],
transformBlue [256];
for (int i = 0; i < 256; i++)
{
Q_UINT8 applied = (Q_UINT8) brightnessContrastGamma (i, brightness, contrast, gamma);
if (channels & kpEffectBalanceCommand::Red)
transformRed [i] = applied;
else
transformRed [i] = i;
if (channels & kpEffectBalanceCommand::Green)
transformGreen [i] = applied;
else
transformGreen [i] = i;
if (channels & kpEffectBalanceCommand::Blue)
transformBlue [i] = applied;
else
transformBlue [i] = i;
}
#if DEBUG_KP_EFFECT_BALANCE
kdDebug () << "\tbuild lookup=" << timer.restart () << endl;
#endif
if (image.depth () > 8)
{
for (int y = 0; y < image.height (); y++)
{
for (int x = 0; x < image.width (); x++)
{
const QRgb rgb = image.pixel (x, y);
const Q_UINT8 red = (Q_UINT8) qRed (rgb);
const Q_UINT8 green = (Q_UINT8) qGreen (rgb);
const Q_UINT8 blue = (Q_UINT8) qBlue (rgb);
const Q_UINT8 alpha = (Q_UINT8) qAlpha (rgb);
image.setPixel (x, y,
qRgba (transformRed [red],
transformGreen [green],
transformBlue [blue],
alpha));
#if 0
image.setPixel (x, y,
brightnessContrastGammaForRGB (image.pixel (x, y),
channels,
brightness, contrast, gamma));
#endif
}
}
}
else
{
for (int i = 0; i < image.numColors (); i++)
{
const QRgb rgb = image.color (i);
const Q_UINT8 red = (Q_UINT8) qRed (rgb);
const Q_UINT8 green = (Q_UINT8) qGreen (rgb);
const Q_UINT8 blue = (Q_UINT8) qBlue (rgb);
const Q_UINT8 alpha = (Q_UINT8) qAlpha (rgb);
image.setColor (i,
qRgba (transformRed [red],
transformGreen [green],
transformBlue [blue],
alpha));
#if 0
image.setColor (i,
brightnessContrastGammaForRGB (image.color (i),
channels,
brightness, contrast, gamma));
#endif
}
}
#if DEBUG_KP_EFFECT_BALANCE
kdDebug () << "\teffect=" << timer.restart () << endl;
#endif
const TQPixmap retPixmap = kpPixmapFX::convertToPixmap (image);
#if DEBUG_KP_EFFECT_BALANCE
kdDebug () << "\tconvertToPixmap=" << timer.restart () << endl;
#endif
return retPixmap;
}
// protected virtual [base kpColorEffectCommand]
TQPixmap kpEffectBalanceCommand::applyColorEffect (const TQPixmap &pixmap)
{
return applyColorEffect (pixmap, m_channels,
m_brightness, m_contrast, m_gamma);
}
kpEffectBalanceWidget::kpEffectBalanceWidget (bool actOnSelection,
kpMainWindow *mainWindow,
TQWidget *parent, const char *name)
: kpColorEffectWidget (actOnSelection, mainWindow, parent, name)
{
TQGridLayout *lay = new TQGridLayout (this, 5, 5, marginHint (), spacingHint ());
TQLabel *brightnessLabel = new TQLabel (i18n ("&Brightness:"), this);
m_brightnessInput = new KIntNumInput (0/*value*/, this);
m_brightnessInput->setRange (-50, 50, 1/*step*/, true/*slider*/);
TQPushButton *brightnessResetPushButton = new TQPushButton (i18n ("Re&set"), this);
TQLabel *contrastLabel = new TQLabel (i18n ("Co&ntrast:"), this);
m_contrastInput = new KIntNumInput (0/*value*/, this);
m_contrastInput->setRange (-50, 50, 1/*step*/, true/*slider*/);
TQPushButton *contrastResetPushButton = new TQPushButton (i18n ("&Reset"), this);
TQLabel *gammaLabel = new TQLabel (i18n ("&Gamma:"), this);
m_gammaInput = new KIntNumInput (0/*value*/, this);
m_gammaInput->setRange (-50, 50, 1/*step*/, true/*slider*/);
// TODO: This is what should be shown in the m_gammaInput spinbox
m_gammaLabel = new TQLabel (this);
// TODO: This doesn't seem to be wide enough with some fonts so the
// whole layout moves when we drag the gamma slider.
m_gammaLabel->setMinimumWidth (m_gammaLabel->fontMetrics ().width (" 10.00 "));
m_gammaLabel->setAlignment (m_gammaLabel->alignment () | Qt::AlignRight);
TQPushButton *gammaResetPushButton = new TQPushButton (i18n ("Rese&t"), this);
TQWidget *spaceWidget = new TQLabel (this);
spaceWidget->setFixedSize (1, spacingHint ());
TQLabel *channelLabel = new TQLabel (i18n ("C&hannels:"), this);
m_channelsComboBox = new KComboBox (this);
m_channelsComboBox->insertItem (i18n ("All"));
m_channelsComboBox->insertItem (i18n ("Red"));
m_channelsComboBox->insertItem (i18n ("Green"));
m_channelsComboBox->insertItem (i18n ("Blue"));
TQPushButton *resetPushButton = new TQPushButton (i18n ("Reset &All Values"), this);
brightnessLabel->setBuddy (m_brightnessInput);
contrastLabel->setBuddy (m_contrastInput);
gammaLabel->setBuddy (m_gammaInput);
channelLabel->setBuddy (m_channelsComboBox);
lay->addWidget (brightnessLabel, 0, 0);
lay->addMultiCellWidget (m_brightnessInput, 0, 0, 1, 2);
lay->addWidget (brightnessResetPushButton, 0, 4);
lay->addWidget (contrastLabel, 1, 0);
lay->addMultiCellWidget (m_contrastInput, 1, 1, 1, 2);
lay->addWidget (contrastResetPushButton, 1, 4);
lay->addWidget (gammaLabel, 2, 0);
lay->addMultiCellWidget (m_gammaInput, 2, 2, 1, 2);
lay->addWidget (m_gammaLabel, 2, 3);
lay->addWidget (gammaResetPushButton, 2, 4);
lay->addMultiCellWidget (spaceWidget, 3, 3, 0, 4);
lay->addMultiCellWidget (resetPushButton, 4, 4, 2, 4, Qt::AlignRight);
lay->addWidget (channelLabel, 4, 0);
lay->addWidget (m_channelsComboBox, 4, 1, Qt::AlignLeft);
//lay->addWidget (resetPushButton, 4, 2, Qt::AlignRight);
lay->setColStretch (1, 1);
// (no need for settingsChangedDelayed() since BCG effect is so fast :))
connect (m_brightnessInput, TQT_SIGNAL (valueChanged (int)),
this, TQT_SIGNAL (settingsChangedNoWaitCursor ()));
connect (m_contrastInput, TQT_SIGNAL (valueChanged (int)),
this, TQT_SIGNAL (settingsChangedNoWaitCursor ()));
connect (m_gammaInput, TQT_SIGNAL (valueChanged (int)),
this, TQT_SLOT (recalculateGammaLabel ()));
connect (m_gammaInput, TQT_SIGNAL (valueChanged (int)),
this, TQT_SIGNAL (settingsChangedNoWaitCursor ()));
connect (m_channelsComboBox, TQT_SIGNAL (activated (int)),
this, TQT_SIGNAL (settingsChanged ()));
connect (brightnessResetPushButton, TQT_SIGNAL (clicked ()),
this, TQT_SLOT (resetBrightness ()));
connect (contrastResetPushButton, TQT_SIGNAL (clicked ()),
this, TQT_SLOT (resetContrast ()));
connect (gammaResetPushButton, TQT_SIGNAL (clicked ()),
this, TQT_SLOT (resetGamma ()));
connect (resetPushButton, TQT_SIGNAL (clicked ()),
this, TQT_SLOT (resetAll ()));
recalculateGammaLabel ();
}
kpEffectBalanceWidget::~kpEffectBalanceWidget ()
{
}
// public virtual [base kpColorEffectWidget]
TQString kpEffectBalanceWidget::caption () const
{
return i18n ("Settings");
}
// public virtual [base kpColorEffectWidget]
bool kpEffectBalanceWidget::isNoOp () const
{
return (brightness () == 0 && contrast () == 0 && gamma () == 0);
}
// public virtual [base kpColorEffectWidget]
TQPixmap kpEffectBalanceWidget::applyColorEffect (const TQPixmap &pixmap)
{
return kpEffectBalanceCommand::applyColorEffect (pixmap,
channels (), brightness (), contrast (), gamma ());
}
// public virtual [base kpColorEffectWidget]
kpColorEffectCommand *kpEffectBalanceWidget::createCommand () const
{
return new kpEffectBalanceCommand (channels (),
brightness (), contrast (), gamma (),
m_actOnSelection,
m_mainWindow);
}
// protected
int kpEffectBalanceWidget::channels () const
{
switch (m_channelsComboBox->currentItem ())
{
default:
case 0:
return kpEffectBalanceCommand::RGB;
case 1:
return kpEffectBalanceCommand::Red;
case 2:
return kpEffectBalanceCommand::Green;
case 3:
return kpEffectBalanceCommand::Blue;
}
}
// protected
int kpEffectBalanceWidget::brightness () const
{
return m_brightnessInput->value ();
}
// protected
int kpEffectBalanceWidget::contrast () const
{
return m_contrastInput->value ();
}
// protected
int kpEffectBalanceWidget::gamma () const
{
return m_gammaInput->value ();
}
// protected slot
void kpEffectBalanceWidget::recalculateGammaLabel ()
{
m_gammaLabel->setText (
" " +
TQString::number (pow (10, gamma () / 50.0),
'f'/*[-]9.9*/,
2/*precision*/) +
" ");
m_gammaLabel->repaint ();
}
// protected slot
void kpEffectBalanceWidget::resetBrightness ()
{
if (brightness () == 0)
return;
bool sb = signalsBlocked ();
if (!sb) blockSignals (true);
m_brightnessInput->setValue (0);
if (!sb) blockSignals (false);
// Immediate update (if signals aren't blocked)
emit settingsChanged ();
}
// protected slot
void kpEffectBalanceWidget::resetContrast ()
{
if (contrast () == 0)
return;
bool sb = signalsBlocked ();
if (!sb) blockSignals (true);
m_contrastInput->setValue (0);
if (!sb) blockSignals (false);
// Immediate update (if signals aren't blocked)
emit settingsChanged ();
}
// protected slot
void kpEffectBalanceWidget::resetGamma ()
{
if (gamma () == 0)
return;
bool sb = signalsBlocked ();
if (!sb) blockSignals (true);
m_gammaInput->setValue (0);
recalculateGammaLabel ();
if (!sb) blockSignals (false);
// Immediate update (if signals aren't blocked)
emit settingsChanged ();
}
// protected slot
void kpEffectBalanceWidget::resetAll ()
{
if (isNoOp ())
return;
// Prevent multiple settingsChanged() which would normally result in
// redundant, expensive preview repaints
blockSignals (true);
resetBrightness ();
resetContrast ();
resetGamma ();
recalculateGammaLabel ();
blockSignals (false);
emit settingsChanged ();
}
#include <kpeffectbalance.moc>