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Diffstat (limited to 'kolourpaint/pixmapfx/kpeffectbalance.cpp')
| -rw-r--r-- | kolourpaint/pixmapfx/kpeffectbalance.cpp | 517 |
1 files changed, 517 insertions, 0 deletions
diff --git a/kolourpaint/pixmapfx/kpeffectbalance.cpp b/kolourpaint/pixmapfx/kpeffectbalance.cpp new file mode 100644 index 00000000..f4494d29 --- /dev/null +++ b/kolourpaint/pixmapfx/kpeffectbalance.cpp @@ -0,0 +1,517 @@ + +/* + Copyright (c) 2003,2004,2005 Clarence Dang <[email protected]> + 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 <qfontmetrics.h> +#include <qimage.h> +#include <qlabel.h> +#include <qlayout.h> +#include <qpixmap.h> +#include <qpushbutton.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 <qdatetime.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 +QPixmap kpEffectBalanceCommand::applyColorEffect (const QPixmap &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; + QTime timer; timer.start (); +#endif + + QImage 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 QPixmap retPixmap = kpPixmapFX::convertToPixmap (image); +#if DEBUG_KP_EFFECT_BALANCE + kdDebug () << "\tconvertToPixmap=" << timer.restart () << endl; +#endif + + return retPixmap; +} + +// protected virtual [base kpColorEffectCommand] +QPixmap kpEffectBalanceCommand::applyColorEffect (const QPixmap &pixmap) +{ + return applyColorEffect (pixmap, m_channels, + m_brightness, m_contrast, m_gamma); +} + + + +kpEffectBalanceWidget::kpEffectBalanceWidget (bool actOnSelection, + kpMainWindow *mainWindow, + QWidget *parent, const char *name) + : kpColorEffectWidget (actOnSelection, mainWindow, parent, name) +{ + QGridLayout *lay = new QGridLayout (this, 5, 5, marginHint (), spacingHint ()); + + + QLabel *brightnessLabel = new QLabel (i18n ("&Brightness:"), this); + m_brightnessInput = new KIntNumInput (0/*value*/, this); + m_brightnessInput->setRange (-50, 50, 1/*step*/, true/*slider*/); + QPushButton *brightnessResetPushButton = new QPushButton (i18n ("Re&set"), this); + + QLabel *contrastLabel = new QLabel (i18n ("Co&ntrast:"), this); + m_contrastInput = new KIntNumInput (0/*value*/, this); + m_contrastInput->setRange (-50, 50, 1/*step*/, true/*slider*/); + QPushButton *contrastResetPushButton = new QPushButton (i18n ("&Reset"), this); + + QLabel *gammaLabel = new QLabel (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 QLabel (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); + QPushButton *gammaResetPushButton = new QPushButton (i18n ("Rese&t"), this); + + + QWidget *spaceWidget = new QLabel (this); + spaceWidget->setFixedSize (1, spacingHint ()); + + + QLabel *channelLabel = new QLabel (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")); + + + QPushButton *resetPushButton = new QPushButton (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, SIGNAL (valueChanged (int)), + this, SIGNAL (settingsChangedNoWaitCursor ())); + connect (m_contrastInput, SIGNAL (valueChanged (int)), + this, SIGNAL (settingsChangedNoWaitCursor ())); + + connect (m_gammaInput, SIGNAL (valueChanged (int)), + this, SLOT (recalculateGammaLabel ())); + connect (m_gammaInput, SIGNAL (valueChanged (int)), + this, SIGNAL (settingsChangedNoWaitCursor ())); + + connect (m_channelsComboBox, SIGNAL (activated (int)), + this, SIGNAL (settingsChanged ())); + + connect (brightnessResetPushButton, SIGNAL (clicked ()), + this, SLOT (resetBrightness ())); + connect (contrastResetPushButton, SIGNAL (clicked ()), + this, SLOT (resetContrast ())); + connect (gammaResetPushButton, SIGNAL (clicked ()), + this, SLOT (resetGamma ())); + + connect (resetPushButton, SIGNAL (clicked ()), + this, SLOT (resetAll ())); + + + recalculateGammaLabel (); +} + +kpEffectBalanceWidget::~kpEffectBalanceWidget () +{ +} + + +// public virtual [base kpColorEffectWidget] +QString 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] +QPixmap kpEffectBalanceWidget::applyColorEffect (const QPixmap &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 ( + " " + + QString::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> |