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518 lines
15 KiB
518 lines
15 KiB
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/*
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Copyright (c) 2003,2004,2005 Clarence Dang <dang@kde.org>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define DEBUG_KP_EFFECT_BALANCE 0
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#include <kpeffectbalance.h>
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#include <math.h>
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#include <tqfontmetrics.h>
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#include <tqimage.h>
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#include <tqlabel.h>
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#include <tqlayout.h>
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#include <tqpixmap.h>
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#include <tqpushbutton.h>
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#include <kcombobox.h>
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#include <kdebug.h>
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#include <kimageeffect.h>
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#include <klocale.h>
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#include <knuminput.h>
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#include <kppixmapfx.h>
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#if DEBUG_KP_EFFECT_BALANCE
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#include <tqdatetime.h>
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#endif
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kpEffectBalanceCommand::kpEffectBalanceCommand (int channels,
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int brightness, int contrast, int gamma,
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bool actOnSelection,
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kpMainWindow *mainWindow)
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: kpColorEffectCommand (i18n ("Balance"), actOnSelection, mainWindow),
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m_channels (channels),
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m_brightness (brightness), m_contrast (contrast), m_gamma (gamma)
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{
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}
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kpEffectBalanceCommand::~kpEffectBalanceCommand ()
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{
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}
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static inline int between0And255 (int val)
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{
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if (val < 0)
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return 0;
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else if (val > 255)
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return 255;
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else
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return val;
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}
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static inline int brightness (int base, int strength)
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{
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return between0And255 (base + strength * 255 / 50);
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}
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static inline int contrast (int base, int strength)
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{
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return between0And255 ((base - 127) * (strength + 50) / 50 + 127);
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}
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static inline int gamma (int base, int strength)
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{
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return between0And255 (qRound (255.0 * pow (base / 255.0, 1.0 / pow (10, strength / 50.0))));
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}
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static inline int brightnessContrastGamma (int base,
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int newBrightness,
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int newContrast,
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int newGamma)
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{
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return gamma (contrast (brightness (base, newBrightness),
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newContrast),
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newGamma);
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}
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static inline QRgb brightnessContrastGammaForRGB (QRgb rgb,
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int channels,
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int brightness, int contrast, int gamma)
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{
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int red = qRed (rgb);
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int green = qGreen (rgb);
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int blue = qBlue (rgb);
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if (channels & kpEffectBalanceCommand::Red)
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red = brightnessContrastGamma (red, brightness, contrast, gamma);
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if (channels & kpEffectBalanceCommand::Green)
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green = brightnessContrastGamma (green, brightness, contrast, gamma);
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if (channels & kpEffectBalanceCommand::Blue)
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blue = brightnessContrastGamma (blue, brightness, contrast, gamma);
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return qRgba (red, green, blue, qAlpha (rgb));
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}
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// public static
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TQPixmap kpEffectBalanceCommand::applyColorEffect (const TQPixmap &pixmap,
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int channels,
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int brightness, int contrast, int gamma)
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{
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#if DEBUG_KP_EFFECT_BALANCE
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kdDebug () << "kpEffectBalanceCommand::applyColorEffect("
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<< "channels=" << channels
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<< ",brightness=" << brightness
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<< ",contrast=" << contrast
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<< ",gamma=" << gamma
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<< ")" << endl;
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TQTime timer; timer.start ();
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#endif
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TQImage image = kpPixmapFX::convertToImage (pixmap);
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#if DEBUG_KP_EFFECT_BALANCE
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kdDebug () << "\tconvertToImage=" << timer.restart () << endl;
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#endif
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Q_UINT8 transformRed [256],
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transformGreen [256],
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transformBlue [256];
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for (int i = 0; i < 256; i++)
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{
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Q_UINT8 applied = (Q_UINT8) brightnessContrastGamma (i, brightness, contrast, gamma);
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if (channels & kpEffectBalanceCommand::Red)
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transformRed [i] = applied;
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else
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transformRed [i] = i;
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if (channels & kpEffectBalanceCommand::Green)
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transformGreen [i] = applied;
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else
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transformGreen [i] = i;
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if (channels & kpEffectBalanceCommand::Blue)
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transformBlue [i] = applied;
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else
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transformBlue [i] = i;
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}
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#if DEBUG_KP_EFFECT_BALANCE
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kdDebug () << "\tbuild lookup=" << timer.restart () << endl;
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#endif
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if (image.depth () > 8)
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{
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for (int y = 0; y < image.height (); y++)
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{
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for (int x = 0; x < image.width (); x++)
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{
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const QRgb rgb = image.pixel (x, y);
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const Q_UINT8 red = (Q_UINT8) qRed (rgb);
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const Q_UINT8 green = (Q_UINT8) qGreen (rgb);
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const Q_UINT8 blue = (Q_UINT8) qBlue (rgb);
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const Q_UINT8 alpha = (Q_UINT8) qAlpha (rgb);
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image.setPixel (x, y,
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qRgba (transformRed [red],
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transformGreen [green],
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transformBlue [blue],
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alpha));
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#if 0
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image.setPixel (x, y,
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brightnessContrastGammaForRGB (image.pixel (x, y),
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channels,
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brightness, contrast, gamma));
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#endif
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}
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}
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}
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else
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{
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for (int i = 0; i < image.numColors (); i++)
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{
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const QRgb rgb = image.color (i);
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const Q_UINT8 red = (Q_UINT8) qRed (rgb);
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const Q_UINT8 green = (Q_UINT8) qGreen (rgb);
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const Q_UINT8 blue = (Q_UINT8) qBlue (rgb);
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const Q_UINT8 alpha = (Q_UINT8) qAlpha (rgb);
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image.setColor (i,
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qRgba (transformRed [red],
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transformGreen [green],
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transformBlue [blue],
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alpha));
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#if 0
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image.setColor (i,
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brightnessContrastGammaForRGB (image.color (i),
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channels,
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brightness, contrast, gamma));
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#endif
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}
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}
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#if DEBUG_KP_EFFECT_BALANCE
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kdDebug () << "\teffect=" << timer.restart () << endl;
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#endif
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const TQPixmap retPixmap = kpPixmapFX::convertToPixmap (image);
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#if DEBUG_KP_EFFECT_BALANCE
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kdDebug () << "\tconvertToPixmap=" << timer.restart () << endl;
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#endif
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return retPixmap;
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}
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// protected virtual [base kpColorEffectCommand]
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TQPixmap kpEffectBalanceCommand::applyColorEffect (const TQPixmap &pixmap)
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{
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return applyColorEffect (pixmap, m_channels,
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m_brightness, m_contrast, m_gamma);
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}
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kpEffectBalanceWidget::kpEffectBalanceWidget (bool actOnSelection,
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kpMainWindow *mainWindow,
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TQWidget *parent, const char *name)
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: kpColorEffectWidget (actOnSelection, mainWindow, parent, name)
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{
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TQGridLayout *lay = new TQGridLayout (this, 5, 5, marginHint (), spacingHint ());
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TQLabel *brightnessLabel = new TQLabel (i18n ("&Brightness:"), this);
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m_brightnessInput = new KIntNumInput (0/*value*/, this);
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m_brightnessInput->setRange (-50, 50, 1/*step*/, true/*slider*/);
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TQPushButton *brightnessResetPushButton = new TQPushButton (i18n ("Re&set"), this);
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TQLabel *contrastLabel = new TQLabel (i18n ("Co&ntrast:"), this);
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m_contrastInput = new KIntNumInput (0/*value*/, this);
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m_contrastInput->setRange (-50, 50, 1/*step*/, true/*slider*/);
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TQPushButton *contrastResetPushButton = new TQPushButton (i18n ("&Reset"), this);
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TQLabel *gammaLabel = new TQLabel (i18n ("&Gamma:"), this);
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m_gammaInput = new KIntNumInput (0/*value*/, this);
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m_gammaInput->setRange (-50, 50, 1/*step*/, true/*slider*/);
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// TODO: This is what should be shown in the m_gammaInput spinbox
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m_gammaLabel = new TQLabel (this);
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// TODO: This doesn't seem to be wide enough with some fonts so the
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// whole layout moves when we drag the gamma slider.
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m_gammaLabel->setMinimumWidth (m_gammaLabel->fontMetrics ().width (" 10.00 "));
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m_gammaLabel->setAlignment (m_gammaLabel->alignment () | Qt::AlignRight);
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TQPushButton *gammaResetPushButton = new TQPushButton (i18n ("Rese&t"), this);
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TQWidget *spaceWidget = new TQLabel (this);
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spaceWidget->setFixedSize (1, spacingHint ());
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TQLabel *channelLabel = new TQLabel (i18n ("C&hannels:"), this);
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m_channelsComboBox = new KComboBox (this);
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m_channelsComboBox->insertItem (i18n ("All"));
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m_channelsComboBox->insertItem (i18n ("Red"));
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m_channelsComboBox->insertItem (i18n ("Green"));
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m_channelsComboBox->insertItem (i18n ("Blue"));
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TQPushButton *resetPushButton = new TQPushButton (i18n ("Reset &All Values"), this);
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brightnessLabel->setBuddy (m_brightnessInput);
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contrastLabel->setBuddy (m_contrastInput);
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gammaLabel->setBuddy (m_gammaInput);
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channelLabel->setBuddy (m_channelsComboBox);
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lay->addWidget (brightnessLabel, 0, 0);
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lay->addMultiCellWidget (m_brightnessInput, 0, 0, 1, 2);
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lay->addWidget (brightnessResetPushButton, 0, 4);
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lay->addWidget (contrastLabel, 1, 0);
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lay->addMultiCellWidget (m_contrastInput, 1, 1, 1, 2);
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lay->addWidget (contrastResetPushButton, 1, 4);
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lay->addWidget (gammaLabel, 2, 0);
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lay->addMultiCellWidget (m_gammaInput, 2, 2, 1, 2);
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lay->addWidget (m_gammaLabel, 2, 3);
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lay->addWidget (gammaResetPushButton, 2, 4);
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lay->addMultiCellWidget (spaceWidget, 3, 3, 0, 4);
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lay->addMultiCellWidget (resetPushButton, 4, 4, 2, 4, Qt::AlignRight);
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lay->addWidget (channelLabel, 4, 0);
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lay->addWidget (m_channelsComboBox, 4, 1, Qt::AlignLeft);
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//lay->addWidget (resetPushButton, 4, 2, Qt::AlignRight);
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lay->setColStretch (1, 1);
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// (no need for settingsChangedDelayed() since BCG effect is so fast :))
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connect (m_brightnessInput, TQT_SIGNAL (valueChanged (int)),
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this, TQT_SIGNAL (settingsChangedNoWaitCursor ()));
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connect (m_contrastInput, TQT_SIGNAL (valueChanged (int)),
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this, TQT_SIGNAL (settingsChangedNoWaitCursor ()));
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connect (m_gammaInput, TQT_SIGNAL (valueChanged (int)),
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this, TQT_SLOT (recalculateGammaLabel ()));
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connect (m_gammaInput, TQT_SIGNAL (valueChanged (int)),
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this, TQT_SIGNAL (settingsChangedNoWaitCursor ()));
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connect (m_channelsComboBox, TQT_SIGNAL (activated (int)),
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this, TQT_SIGNAL (settingsChanged ()));
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connect (brightnessResetPushButton, TQT_SIGNAL (clicked ()),
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this, TQT_SLOT (resetBrightness ()));
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connect (contrastResetPushButton, TQT_SIGNAL (clicked ()),
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this, TQT_SLOT (resetContrast ()));
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connect (gammaResetPushButton, TQT_SIGNAL (clicked ()),
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this, TQT_SLOT (resetGamma ()));
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connect (resetPushButton, TQT_SIGNAL (clicked ()),
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this, TQT_SLOT (resetAll ()));
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recalculateGammaLabel ();
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}
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kpEffectBalanceWidget::~kpEffectBalanceWidget ()
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{
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}
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// public virtual [base kpColorEffectWidget]
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TQString kpEffectBalanceWidget::caption () const
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{
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return i18n ("Settings");
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}
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// public virtual [base kpColorEffectWidget]
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bool kpEffectBalanceWidget::isNoOp () const
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{
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return (brightness () == 0 && contrast () == 0 && gamma () == 0);
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}
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// public virtual [base kpColorEffectWidget]
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TQPixmap kpEffectBalanceWidget::applyColorEffect (const TQPixmap &pixmap)
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{
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return kpEffectBalanceCommand::applyColorEffect (pixmap,
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channels (), brightness (), contrast (), gamma ());
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}
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// public virtual [base kpColorEffectWidget]
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kpColorEffectCommand *kpEffectBalanceWidget::createCommand () const
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{
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return new kpEffectBalanceCommand (channels (),
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brightness (), contrast (), gamma (),
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m_actOnSelection,
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m_mainWindow);
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}
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// protected
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int kpEffectBalanceWidget::channels () const
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{
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switch (m_channelsComboBox->currentItem ())
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{
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default:
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case 0:
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return kpEffectBalanceCommand::RGB;
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case 1:
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return kpEffectBalanceCommand::Red;
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case 2:
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return kpEffectBalanceCommand::Green;
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case 3:
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return kpEffectBalanceCommand::Blue;
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}
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}
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// protected
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int kpEffectBalanceWidget::brightness () const
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{
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return m_brightnessInput->value ();
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}
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// protected
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int kpEffectBalanceWidget::contrast () const
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{
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return m_contrastInput->value ();
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}
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// protected
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int kpEffectBalanceWidget::gamma () const
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{
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return m_gammaInput->value ();
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}
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// protected slot
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void kpEffectBalanceWidget::recalculateGammaLabel ()
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{
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m_gammaLabel->setText (
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" " +
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TQString::number (pow (10, gamma () / 50.0),
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'f'/*[-]9.9*/,
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2/*precision*/) +
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" ");
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m_gammaLabel->repaint ();
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}
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// protected slot
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void kpEffectBalanceWidget::resetBrightness ()
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{
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if (brightness () == 0)
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return;
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bool sb = signalsBlocked ();
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if (!sb) blockSignals (true);
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m_brightnessInput->setValue (0);
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if (!sb) blockSignals (false);
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// Immediate update (if signals aren't blocked)
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emit settingsChanged ();
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}
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// protected slot
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void kpEffectBalanceWidget::resetContrast ()
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{
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if (contrast () == 0)
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return;
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bool sb = signalsBlocked ();
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if (!sb) blockSignals (true);
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m_contrastInput->setValue (0);
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if (!sb) blockSignals (false);
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// Immediate update (if signals aren't blocked)
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emit settingsChanged ();
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}
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// protected slot
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void kpEffectBalanceWidget::resetGamma ()
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{
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if (gamma () == 0)
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return;
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bool sb = signalsBlocked ();
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if (!sb) blockSignals (true);
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m_gammaInput->setValue (0);
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recalculateGammaLabel ();
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if (!sb) blockSignals (false);
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// Immediate update (if signals aren't blocked)
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emit settingsChanged ();
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}
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// protected slot
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void kpEffectBalanceWidget::resetAll ()
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{
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if (isNoOp ())
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return;
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// Prevent multiple settingsChanged() which would normally result in
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// redundant, expensive preview repaints
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blockSignals (true);
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resetBrightness ();
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resetContrast ();
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resetGamma ();
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recalculateGammaLabel ();
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blockSignals (false);
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emit settingsChanged ();
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}
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#include <kpeffectbalance.moc>
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