forked from openkylin/kolourpaint
90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
|
|
/*
|
|
Copyright (c) 2003-2007 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_INVERT 0
|
|
|
|
|
|
#include "kpEffectInvert.h"
|
|
|
|
#include <QImage>
|
|
|
|
#include "kpLogCategories.h"
|
|
|
|
#include "pixmapfx/kpPixmapFX.h"
|
|
|
|
|
|
// public static
|
|
void kpEffectInvert::applyEffect (QImage *destImagePtr, int channels)
|
|
{
|
|
if (channels == kpEffectInvert::RGB)
|
|
{
|
|
destImagePtr->invertPixels ();
|
|
return;
|
|
}
|
|
|
|
QRgb mask = qRgba ((channels & Red) ? 0xFF : 0,
|
|
(channels & Green) ? 0xFF : 0,
|
|
(channels & Blue) ? 0xFF : 0,
|
|
0/*don't invert alpha*/);
|
|
#if DEBUG_KP_EFFECT_INVERT
|
|
qCDebug(kpLogImagelib) << "kpEffectInvert::applyEffect(channels=" << channels
|
|
<< ") mask=" << (int *) mask;
|
|
#endif
|
|
|
|
if (destImagePtr->depth () > 8)
|
|
{
|
|
// Above version works for Qt 3.2 at least.
|
|
// But this version will always work (slower, though) and supports
|
|
// inverting particular channels.
|
|
for (int y = 0; y < destImagePtr->height (); y++)
|
|
{
|
|
for (int x = 0; x < destImagePtr->width (); x++)
|
|
{
|
|
destImagePtr->setPixel (x, y, destImagePtr->pixel (x, y) ^ mask);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (int i = 0; i < destImagePtr->colorCount (); i++)
|
|
{
|
|
destImagePtr->setColor (i, destImagePtr->color (i) ^ mask);
|
|
}
|
|
}
|
|
}
|
|
|
|
// public static
|
|
QImage kpEffectInvert::applyEffect (const QImage &img, int channels)
|
|
{
|
|
QImage retImage = img;
|
|
applyEffect (&retImage, channels);
|
|
return retImage;
|
|
}
|
|
|
|
|