1 files changed, 0 insertions, 1 deletions

diff --git a/libopie2/opieui/oimageeffect.cpp b/libopie2/opieui/oimageeffect.cpp
index 2855da6..01e7c6f 100644
--- a/libopie2/opieui/oimageeffect.cpp
+++ b/libopie2/opieui/oimageeffect.cpp
@@ -1,1572 +1,1571 @@
 /* This file is part of the KDE libraries
     Copyright (C) 1998, 1999, 2001, 2002 Daniel M. Duley <mosfet@kde.org>
     (C) 1998, 1999 Christian Tibirna <ctibirna@total.net>
     (C) 1998, 1999 Dirk A. Mueller <mueller@kde.org>
     (C) 2000 Josef Weidendorfer <weidendo@in.tum.de>
 
 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.
 
 */
 
 // $Id$
 
 #include <math.h>
 
 #include <qimage.h>
 #include <stdlib.h>
-#include <iostream>
 
 #include "oimageeffect.h"
 
 #define MaxRGB 255L
 #define DegreesToRadians(x) ((x)*M_PI/180.0)
 
 using namespace std;
 
 inline unsigned int intensityValue(unsigned int color)
 {
     return((unsigned int)((0.299*qRed(color) +
                            0.587*qGreen(color) +
                            0.1140000000000001*qBlue(color))));
 }
 
 //======================================================================
 //
 // Gradient effects
 //
 //======================================================================
 
 QImage OImageEffect::gradient(const QSize &size, const QColor &ca,
         const QColor &cb, GradientType eff, int ncols)
 {
     int rDiff, gDiff, bDiff;
     int rca, gca, bca, rcb, gcb, bcb;
 
     QImage image(size, 32);
 
     if (size.width() == 0 || size.height() == 0) {
       qDebug( "WARNING: OImageEffect::gradient: invalid image" );
       return image;
     }
 
     register int x, y;
 
     rDiff = (rcb = cb.red())   - (rca = ca.red());
     gDiff = (gcb = cb.green()) - (gca = ca.green());
     bDiff = (bcb = cb.blue())  - (bca = ca.blue());
 
     if( eff == VerticalGradient || eff == HorizontalGradient ){
 
         uint *p;
         uint rgb;
 
         register int rl = rca << 16;
         register int gl = gca << 16;
         register int bl = bca << 16;
 
         if( eff == VerticalGradient ) {
 
             int rcdelta = ((1<<16) / size.height()) * rDiff;
             int gcdelta = ((1<<16) / size.height()) * gDiff;
             int bcdelta = ((1<<16) / size.height()) * bDiff;
 
             for ( y = 0; y < size.height(); y++ ) {
                 p = (uint *) image.scanLine(y);
 
                 rl += rcdelta;
                 gl += gcdelta;
                 bl += bcdelta;
 
                 rgb = qRgb( (rl>>16), (gl>>16), (bl>>16) );
 
                 for( x = 0; x < size.width(); x++ ) {
                     *p = rgb;
                     p++;
                 }
             }
 
         }
         else {                  // must be HorizontalGradient
 
             unsigned int *o_src = (unsigned int *)image.scanLine(0);
             unsigned int *src = o_src;
 
             int rcdelta = ((1<<16) / size.width()) * rDiff;
             int gcdelta = ((1<<16) / size.width()) * gDiff;
             int bcdelta = ((1<<16) / size.width()) * bDiff;
 
             for( x = 0; x < size.width(); x++) {
 
                 rl += rcdelta;
                 gl += gcdelta;
                 bl += bcdelta;
 
                 *src++ = qRgb( (rl>>16), (gl>>16), (bl>>16));
             }
 
             src = o_src;
 
             // Believe it or not, manually copying in a for loop is faster
             // than calling memcpy for each scanline (on the order of ms...).
             // I think this is due to the function call overhead (mosfet).
 
             for (y = 1; y < size.height(); ++y) {
 
                 p = (unsigned int *)image.scanLine(y);
                 src = o_src;
                 for(x=0; x < size.width(); ++x)
                     *p++ = *src++;
             }
         }
     }
 
     else {
 
         float rfd, gfd, bfd;
         float rd = rca, gd = gca, bd = bca;
 
         unsigned char *xtable[3];
         unsigned char *ytable[3];
 
         unsigned int w = size.width(), h = size.height();
         xtable[0] = new unsigned char[w];
         xtable[1] = new unsigned char[w];
         xtable[2] = new unsigned char[w];
         ytable[0] = new unsigned char[h];
         ytable[1] = new unsigned char[h];
         ytable[2] = new unsigned char[h];
         w*=2, h*=2;
 
         if ( eff == DiagonalGradient || eff == CrossDiagonalGradient) {
             // Diagonal dgradient code inspired by BlackBox (mosfet)
             // BlackBox dgradient is (C) Brad Hughes, <bhughes@tcac.net> and
             // Mike Cole <mike@mydot.com>.
 
             rfd = (float)rDiff/w;
             gfd = (float)gDiff/w;
             bfd = (float)bDiff/w;
 
             int dir;
             for (x = 0; x < size.width(); x++, rd+=rfd, gd+=gfd, bd+=bfd) {
                 dir = eff == DiagonalGradient? x : size.width() - x - 1;
                 xtable[0][dir] = (unsigned char) rd;
                 xtable[1][dir] = (unsigned char) gd;
                 xtable[2][dir] = (unsigned char) bd;
             }
             rfd = (float)rDiff/h;
             gfd = (float)gDiff/h;
             bfd = (float)bDiff/h;
             rd = gd = bd = 0;
             for (y = 0; y < size.height(); y++, rd+=rfd, gd+=gfd, bd+=bfd) {
                 ytable[0][y] = (unsigned char) rd;
                 ytable[1][y] = (unsigned char) gd;
                 ytable[2][y] = (unsigned char) bd;
             }
 
             for (y = 0; y < size.height(); y++) {
                 unsigned int *scanline = (unsigned int *)image.scanLine(y);
                 for (x = 0; x < size.width(); x++) {
                     scanline[x] = qRgb(xtable[0][x] + ytable[0][y],
                                        xtable[1][x] + ytable[1][y],
                                        xtable[2][x] + ytable[2][y]);
                 }
             }
         }
 
         else if (eff == RectangleGradient ||
                  eff == PyramidGradient ||
                  eff == PipeCrossGradient ||
                  eff == EllipticGradient)
         {
             int rSign = rDiff>0? 1: -1;
             int gSign = gDiff>0? 1: -1;
             int bSign = bDiff>0? 1: -1;
 
             rfd = (float)rDiff / size.width();
             gfd = (float)gDiff / size.width();
             bfd = (float)bDiff / size.width();
 
             rd = (float)rDiff/2;
             gd = (float)gDiff/2;
             bd = (float)bDiff/2;
 
             for (x = 0; x < size.width(); x++, rd-=rfd, gd-=gfd, bd-=bfd)
             {
                 xtable[0][x] = (unsigned char) abs((int)rd);
                 xtable[1][x] = (unsigned char) abs((int)gd);
                 xtable[2][x] = (unsigned char) abs((int)bd);
             }
 
             rfd = (float)rDiff/size.height();
             gfd = (float)gDiff/size.height();
             bfd = (float)bDiff/size.height();
 
             rd = (float)rDiff/2;
             gd = (float)gDiff/2;
             bd = (float)bDiff/2;
 
             for (y = 0; y < size.height(); y++, rd-=rfd, gd-=gfd, bd-=bfd)
             {
                 ytable[0][y] = (unsigned char) abs((int)rd);
                 ytable[1][y] = (unsigned char) abs((int)gd);
                 ytable[2][y] = (unsigned char) abs((int)bd);
             }
             unsigned int rgb;
             int h = (size.height()+1)>>1;
             for (y = 0; y < h; y++) {
                 unsigned int *sl1 = (unsigned int *)image.scanLine(y);
                 unsigned int *sl2 = (unsigned int *)image.scanLine(QMAX(size.height()-y-1, y));
 
                 int w = (size.width()+1)>>1;
                 int x2 = size.width()-1;
 
                 for (x = 0; x < w; x++, x2--) {
                     rgb = 0;
                     if (eff == PyramidGradient) {
                         rgb = qRgb(rcb-rSign*(xtable[0][x]+ytable[0][y]),
                                    gcb-gSign*(xtable[1][x]+ytable[1][y]),
                                    bcb-bSign*(xtable[2][x]+ytable[2][y]));
                     }
                     if (eff == RectangleGradient) {
                         rgb = qRgb(rcb - rSign *
                                    QMAX(xtable[0][x], ytable[0][y]) * 2,
                                    gcb - gSign *
                                    QMAX(xtable[1][x], ytable[1][y]) * 2,
                                    bcb - bSign *
                                    QMAX(xtable[2][x], ytable[2][y]) * 2);
                     }
                     if (eff == PipeCrossGradient) {
                         rgb = qRgb(rcb - rSign *
                                    QMIN(xtable[0][x], ytable[0][y]) * 2,
                                    gcb - gSign *
                                    QMIN(xtable[1][x], ytable[1][y]) * 2,
                                    bcb - bSign *
                                    QMIN(xtable[2][x], ytable[2][y]) * 2);
                     }
                     if (eff == EllipticGradient) {
                         rgb = qRgb(rcb - rSign *
                                    (int)sqrt((xtable[0][x]*xtable[0][x] +
                                               ytable[0][y]*ytable[0][y])*2.0),
                                    gcb - gSign *
                                    (int)sqrt((xtable[1][x]*xtable[1][x] +
                                               ytable[1][y]*ytable[1][y])*2.0),
                                    bcb - bSign *
                                    (int)sqrt((xtable[2][x]*xtable[2][x] +
                                               ytable[2][y]*ytable[2][y])*2.0));
                     }
 
                     sl1[x] = sl2[x] = rgb;
                     sl1[x2] = sl2[x2] = rgb;
                 }
             }
         }
 
         delete [] xtable[0];
         delete [] xtable[1];
         delete [] xtable[2];
         delete [] ytable[0];
         delete [] ytable[1];
         delete [] ytable[2];
     }
 
     // dither if necessary
     if (ncols && (QPixmap::defaultDepth() < 15 )) {
         if ( ncols < 2 || ncols > 256 )
             ncols = 3;
         QColor *dPal = new QColor[ncols];
         for (int i=0; i<ncols; i++) {
             dPal[i].setRgb ( rca + rDiff * i / ( ncols - 1 ),
                              gca + gDiff * i / ( ncols - 1 ),
                              bca + bDiff * i / ( ncols - 1 ) );
         }
     dither(image, dPal, ncols);
         delete [] dPal;
     }
 
     return image;
 }
 
 
 // -----------------------------------------------------------------------------
 
 //CT this was (before Dirk A. Mueller's speedup changes)
 //   merely the same code as in the above method, but it's supposedly
 //   way less performant since it introduces a lot of supplementary tests
 //   and simple math operations for the calculus of the balance.
 //      (surprizingly, it isn't less performant, in the contrary :-)
 //   Yes, I could have merged them, but then the excellent performance of
 //   the balanced code would suffer with no other gain than a mere
 //   source code and byte code size economy.
 
 QImage OImageEffect::unbalancedGradient(const QSize &size, const QColor &ca,
         const QColor &cb, GradientType eff, int xfactor, int yfactor,
         int ncols)
 {
     int dir; // general parameter used for direction switches
 
     bool _xanti = false , _yanti = false;
 
     if (xfactor < 0) _xanti = true; // negative on X direction
     if (yfactor < 0) _yanti = true; // negative on Y direction
 
     xfactor = abs(xfactor);
     yfactor = abs(yfactor);
 
     if (!xfactor) xfactor = 1;
     if (!yfactor) yfactor = 1;
 
     if (xfactor > 200 ) xfactor = 200;
     if (yfactor > 200 ) yfactor = 200;
 
 
     //    float xbal = xfactor/5000.;
     //    float ybal = yfactor/5000.;
     float xbal = xfactor/30./size.width();
     float ybal = yfactor/30./size.height();
     float rat;
 
     int rDiff, gDiff, bDiff;
     int rca, gca, bca, rcb, gcb, bcb;
 
     QImage image(size, 32);
 
     if (size.width() == 0 || size.height() == 0) {
       qDebug( "WARNING: OImageEffect::unbalancedGradient : invalid image" );
       return image;
     }
 
     register int x, y;
     unsigned int *scanline;
 
     rDiff = (rcb = cb.red())   - (rca = ca.red());
     gDiff = (gcb = cb.green()) - (gca = ca.green());
     bDiff = (bcb = cb.blue())  - (bca = ca.blue());
 
     if( eff == VerticalGradient || eff == HorizontalGradient){
         QColor cRow;
 
         uint *p;
         uint rgbRow;
 
         if( eff == VerticalGradient) {
           for ( y = 0; y < size.height(); y++ ) {
             dir = _yanti ? y : size.height() - 1 - y;
             p = (uint *) image.scanLine(dir);
             rat =  1 - exp( - (float)y  * ybal );
 
             cRow.setRgb( rcb - (int) ( rDiff * rat ),
                          gcb - (int) ( gDiff * rat ),
                          bcb - (int) ( bDiff * rat ) );
 
             rgbRow = cRow.rgb();
 
             for( x = 0; x < size.width(); x++ ) {
               *p = rgbRow;
               p++;
             }
           }
         }
         else {
 
           unsigned int *src = (unsigned int *)image.scanLine(0);
           for(x = 0; x < size.width(); x++ )
             {
               dir = _xanti ? x : size.width() - 1 - x;
               rat = 1 - exp( - (float)x  * xbal );
 
               src[dir] = qRgb(rcb - (int) ( rDiff * rat ),
                             gcb - (int) ( gDiff * rat ),
                             bcb - (int) ( bDiff * rat ));
             }
 
           // Believe it or not, manually copying in a for loop is faster
           // than calling memcpy for each scanline (on the order of ms...).
           // I think this is due to the function call overhead (mosfet).
 
           for(y = 1; y < size.height(); ++y)
             {
               scanline = (unsigned int *)image.scanLine(y);
               for(x=0; x < size.width(); ++x)
                 scanline[x] = src[x];
             }
         }
     }
 
     else {
       int w=size.width(), h=size.height();
 
       unsigned char *xtable[3];
       unsigned char *ytable[3];
       xtable[0] = new unsigned char[w];
       xtable[1] = new unsigned char[w];
       xtable[2] = new unsigned char[w];
       ytable[0] = new unsigned char[h];
       ytable[1] = new unsigned char[h];
       ytable[2] = new unsigned char[h];
 
       if ( eff == DiagonalGradient || eff == CrossDiagonalGradient)
         {
           for (x = 0; x < w; x++) {
               dir = _xanti ? x : w - 1 - x;
               rat = 1 - exp( - (float)x * xbal );
 
               xtable[0][dir] = (unsigned char) ( rDiff/2 * rat );
               xtable[1][dir] = (unsigned char) ( gDiff/2 * rat );
               xtable[2][dir] = (unsigned char) ( bDiff/2 * rat );
           }
 
           for (y = 0; y < h; y++) {
               dir = _yanti ? y : h - 1 - y;
               rat =  1 - exp( - (float)y  * ybal );
 
               ytable[0][dir] = (unsigned char) ( rDiff/2 * rat );
               ytable[1][dir] = (unsigned char) ( gDiff/2 * rat );
               ytable[2][dir] = (unsigned char) ( bDiff/2 * rat );
           }
 
           for (y = 0; y < h; y++) {
               unsigned int *scanline = (unsigned int *)image.scanLine(y);
               for (x = 0; x < w; x++) {
                   scanline[x] = qRgb(rcb - (xtable[0][x] + ytable[0][y]),
                                      gcb - (xtable[1][x] + ytable[1][y]),
                                      bcb - (xtable[2][x] + ytable[2][y]));
               }
           }
         }
 
       else if (eff == RectangleGradient ||
                eff == PyramidGradient ||
                eff == PipeCrossGradient ||
                eff == EllipticGradient)
       {
           int rSign = rDiff>0? 1: -1;
           int gSign = gDiff>0? 1: -1;
           int bSign = bDiff>0? 1: -1;
 
           for (x = 0; x < w; x++)
             {
                 dir = _xanti ? x : w - 1 - x;
                 rat =  1 - exp( - (float)x * xbal );
 
                 xtable[0][dir] = (unsigned char) abs((int)(rDiff*(0.5-rat)));
                 xtable[1][dir] = (unsigned char) abs((int)(gDiff*(0.5-rat)));
                 xtable[2][dir] = (unsigned char) abs((int)(bDiff*(0.5-rat)));
             }
 
           for (y = 0; y < h; y++)
           {
               dir = _yanti ? y : h - 1 - y;
 
               rat =  1 - exp( - (float)y * ybal );
 
               ytable[0][dir] = (unsigned char) abs((int)(rDiff*(0.5-rat)));
               ytable[1][dir] = (unsigned char) abs((int)(gDiff*(0.5-rat)));
               ytable[2][dir] = (unsigned char) abs((int)(bDiff*(0.5-rat)));
           }
 
           for (y = 0; y < h; y++) {
               unsigned int *scanline = (unsigned int *)image.scanLine(y);
               for (x = 0; x < w; x++) {
                   if (eff == PyramidGradient)
                   {
                       scanline[x] = qRgb(rcb-rSign*(xtable[0][x]+ytable[0][y]),
                                          gcb-gSign*(xtable[1][x]+ytable[1][y]),
                                          bcb-bSign*(xtable[2][x]+ytable[2][y]));
                   }
                   if (eff == RectangleGradient)
                   {
                       scanline[x] = qRgb(rcb - rSign *
                                          QMAX(xtable[0][x], ytable[0][y]) * 2,
                                          gcb - gSign *
                                          QMAX(xtable[1][x], ytable[1][y]) * 2,
                                          bcb - bSign *
                                          QMAX(xtable[2][x], ytable[2][y]) * 2);
                   }
                   if (eff == PipeCrossGradient)
                   {
                       scanline[x] = qRgb(rcb - rSign *
                                          QMIN(xtable[0][x], ytable[0][y]) * 2,
                                          gcb - gSign *
                                          QMIN(xtable[1][x], ytable[1][y]) * 2,
                                          bcb - bSign *
                                          QMIN(xtable[2][x], ytable[2][y]) * 2);
                   }
                   if (eff == EllipticGradient)
                   {
                       scanline[x] = qRgb(rcb - rSign *
                                          (int)sqrt((xtable[0][x]*xtable[0][x] +
                                                     ytable[0][y]*ytable[0][y])*2.0),
                                          gcb - gSign *
                                          (int)sqrt((xtable[1][x]*xtable[1][x] +
                                                     ytable[1][y]*ytable[1][y])*2.0),
                                          bcb - bSign *
                                          (int)sqrt((xtable[2][x]*xtable[2][x] +
                                                     ytable[2][y]*ytable[2][y])*2.0));
                   }
               }
           }
       }
 
       if (ncols && (QPixmap::defaultDepth() < 15 )) {
           if ( ncols < 2 || ncols > 256 )
               ncols = 3;
           QColor *dPal = new QColor[ncols];
           for (int i=0; i<ncols; i++) {
               dPal[i].setRgb ( rca + rDiff * i / ( ncols - 1 ),
                                gca + gDiff * i / ( ncols - 1 ),
                                bca + bDiff * i / ( ncols - 1 ) );
           }
           dither(image, dPal, ncols);
           delete [] dPal;
       }
 
       delete [] xtable[0];
       delete [] xtable[1];
       delete [] xtable[2];
       delete [] ytable[0];
       delete [] ytable[1];
       delete [] ytable[2];
 
     }
 
     return image;
 }
 
 
 //======================================================================
 //
 // Intensity effects
 //
 //======================================================================
 
 
 /* This builds a 256 byte unsigned char lookup table with all
  * the possible percent values prior to applying the effect, then uses
  * integer math for the pixels. For any image larger than 9x9 this will be
  * less expensive than doing a float operation on the 3 color components of
  * each pixel. (mosfet)
  */
 
 QImage& OImageEffect::intensity(QImage &image, float percent)
 {
     if (image.width() == 0 || image.height() == 0) {
       qDebug( "WARNING: OImageEffect::intensity : invalid image" );
       return image;
     }
 
     int segColors = image.depth() > 8 ? 256 : image.numColors();
     unsigned char *segTbl = new unsigned char[segColors];
     int pixels = image.depth() > 8 ? image.width()*image.height() :
         image.numColors();
     unsigned int *data = image.depth() > 8 ? (unsigned int *)image.bits() :
         (unsigned int *)image.colorTable();
 
     bool brighten = (percent >= 0);
     if(percent < 0)
         percent = -percent;
 
     if(brighten){ // keep overflow check out of loops
         for(int i=0; i < segColors; ++i){
             int tmp = (int)(i*percent);
             if(tmp > 255)
                 tmp = 255;
             segTbl[i] = tmp;
         }
     }
     else{
         for(int i=0; i < segColors; ++i){
             int tmp = (int)(i*percent);
             if(tmp < 0)
                 tmp = 0;
             segTbl[i] = tmp;
         }
     }
 
     if(brighten){ // same here
         for(int i=0; i < pixels; ++i){
             int r = qRed(data[i]);
             int g = qGreen(data[i]);
             int b = qBlue(data[i]);
             int a = qAlpha(data[i]);
             r = r + segTbl[r] > 255 ? 255 : r + segTbl[r];
             g = g + segTbl[g] > 255 ? 255 : g + segTbl[g];
             b = b + segTbl[b] > 255 ? 255 : b + segTbl[b];
             data[i] = qRgba(r, g, b,a);
         }
     }
     else{
         for(int i=0; i < pixels; ++i){
             int r = qRed(data[i]);
             int g = qGreen(data[i]);
             int b = qBlue(data[i]);
             int a = qAlpha(data[i]);
             r = r - segTbl[r] < 0 ? 0 : r - segTbl[r];
             g = g - segTbl[g] < 0 ? 0 : g - segTbl[g];
             b = b - segTbl[b] < 0 ? 0 : b - segTbl[b];
             data[i] = qRgba(r, g, b, a);
         }
     }
     delete [] segTbl;
 
     return image;
 }
 
 QImage& OImageEffect::channelIntensity(QImage &image, float percent,
                                        RGBComponent channel)
 {
     if (image.width() == 0 || image.height() == 0) {
       qDebug( "WARNING: OImageEffect::channelIntensity : invalid image" );
       return image;
     }
 
     int segColors = image.depth() > 8 ? 256 : image.numColors();
     unsigned char *segTbl = new unsigned char[segColors];
     int pixels = image.depth() > 8 ? image.width()*image.height() :
         image.numColors();
     unsigned int *data = image.depth() > 8 ? (unsigned int *)image.bits() :
         (unsigned int *)image.colorTable();
     bool brighten = (percent >= 0);
     if(percent < 0)
         percent = -percent;
 
     if(brighten){ // keep overflow check out of loops
         for(int i=0; i < segColors; ++i){
             int tmp = (int)(i*percent);
             if(tmp > 255)
                 tmp = 255;
             segTbl[i] = tmp;
         }
     }
     else{
         for(int i=0; i < segColors; ++i){
             int tmp = (int)(i*percent);
             if(tmp < 0)
                 tmp = 0;
             segTbl[i] = tmp;
         }
     }
 
     if(brighten){ // same here
         if(channel == Red){ // and here ;-)
             for(int i=0; i < pixels; ++i){
                 int c = qRed(data[i]);
                 c = c + segTbl[c] > 255 ? 255 : c + segTbl[c];
                 data[i] = qRgba(c, qGreen(data[i]), qBlue(data[i]), qAlpha(data[i]));
             }
         }
         if(channel == Green){
             for(int i=0; i < pixels; ++i){
                 int c = qGreen(data[i]);
                 c = c + segTbl[c] > 255 ? 255 : c + segTbl[c];
                 data[i] = qRgba(qRed(data[i]), c, qBlue(data[i]), qAlpha(data[i]));
             }
         }
         else{
             for(int i=0; i < pixels; ++i){
                 int c = qBlue(data[i]);
                 c = c + segTbl[c] > 255 ? 255 : c + segTbl[c];
                 data[i] = qRgba(qRed(data[i]), qGreen(data[i]), c, qAlpha(data[i]));
             }
         }
 
     }
     else{
         if(channel == Red){
             for(int i=0; i < pixels; ++i){
                 int c = qRed(data[i]);
                 c = c - segTbl[c] < 0 ? 0 : c - segTbl[c];
                 data[i] = qRgba(c, qGreen(data[i]), qBlue(data[i]), qAlpha(data[i]));
             }
         }
         if(channel == Green){
             for(int i=0; i < pixels; ++i){
                 int c = qGreen(data[i]);
                 c = c - segTbl[c] < 0 ? 0 : c - segTbl[c];
                 data[i] = qRgba(qRed(data[i]), c, qBlue(data[i]), qAlpha(data[i]));
             }
         }
         else{
             for(int i=0; i < pixels; ++i){
                 int c = qBlue(data[i]);
                 c = c - segTbl[c] < 0 ? 0 : c - segTbl[c];
                 data[i] = qRgba(qRed(data[i]), qGreen(data[i]), c, qAlpha(data[i]));
             }
         }
     }
     delete [] segTbl;
 
     return image;
 }
 
 // Modulate an image with an RBG channel of another image
 //
 QImage& OImageEffect::modulate(QImage &image, QImage &modImage, bool reverse,
         ModulationType type, int factor, RGBComponent channel)
 {
     if (image.width() == 0 || image.height() == 0 ||
         modImage.width() == 0 || modImage.height() == 0) {
           qDebug( "WARNING: OImageEffect::modulate : invalid image" );
           return image;
     }
 
     int r, g, b, h, s, v, a;
     QColor clr;
     int mod=0;
     unsigned int x1, x2, y1, y2;
     register int x, y;
 
     // for image, we handle only depth 32
     if (image.depth()<32) image = image.convertDepth(32);
 
     // for modImage, we handle depth 8 and 32
     if (modImage.depth()<8) modImage = modImage.convertDepth(8);
 
     unsigned int *colorTable2 = (modImage.depth()==8) ?
                                  modImage.colorTable():0;
     unsigned int *data1, *data2;
     unsigned char *data2b;
     unsigned int color1, color2;
 
     x1 = image.width();    y1 = image.height();
     x2 = modImage.width(); y2 = modImage.height();
 
     for (y = 0; y < (int)y1; y++) {
         data1 =  (unsigned int *) image.scanLine(y);
         data2 =  (unsigned int *) modImage.scanLine( y%y2 );
         data2b = (unsigned char *) modImage.scanLine( y%y2 );
 
         x=0;
         while(x < (int)x1) {
           color2 = (colorTable2) ? colorTable2[*data2b] : *data2;
           if (reverse) {
               color1 = color2;
               color2 = *data1;
           }
           else
               color1 = *data1;
 
           if (type == Intensity || type == Contrast) {
               r = qRed(color1);
               g = qGreen(color1);
               b = qBlue(color1);
               if (channel != All) {
                       mod = (channel == Red) ? qRed(color2) :
                     (channel == Green) ? qGreen(color2) :
                         (channel == Blue) ? qBlue(color2) :
                     (channel == Gray) ? qGray(color2) : 0;
                 mod = mod*factor/50;
               }
 
               if (type == Intensity) {
                 if (channel == All) {
                   r += r * factor/50 * qRed(color2)/256;
                   g += g * factor/50 * qGreen(color2)/256;
                   b += b * factor/50 * qBlue(color2)/256;
                 }
                 else {
                   r += r * mod/256;
                   g += g * mod/256;
                   b += b * mod/256;
                 }
               }
               else { // Contrast
                 if (channel == All) {
                   r += (r-128) * factor/50 * qRed(color2)/128;
                   g += (g-128) * factor/50 * qGreen(color2)/128;
                   b += (b-128) * factor/50 * qBlue(color2)/128;
                 }
                 else {
                   r += (r-128) * mod/128;
                   g += (g-128) * mod/128;
                   b += (b-128) * mod/128;
                 }
               }
 
               if (r<0) r=0; if (r>255) r=255;
               if (g<0) g=0; if (g>255) g=255;
               if (b<0) b=0; if (b>255) b=255;
               a = qAlpha(*data1);
               *data1 = qRgba(r, g, b, a);
           }
           else if (type == Saturation || type == HueShift) {
               clr.setRgb(color1);
               clr.hsv(&h, &s, &v);
                     mod = (channel == Red) ? qRed(color2) :
                     (channel == Green) ? qGreen(color2) :
                         (channel == Blue) ? qBlue(color2) :
                     (channel == Gray) ? qGray(color2) : 0;
               mod = mod*factor/50;
 
               if (type == Saturation) {
                   s -= s * mod/256;
                   if (s<0) s=0; if (s>255) s=255;
               }
               else { // HueShift
                 h += mod;
                 while(h<0) h+=360;
                 h %= 360;
               }
 
               clr.setHsv(h, s, v);
               a = qAlpha(*data1);
               *data1 = clr.rgb() | ((uint)(a & 0xff) << 24);
           }
           data1++; data2++; data2b++; x++;
           if ( (x%x2) ==0) { data2 -= x2; data2b -= x2; }
         }
     }
     return image;
 }
 
 
 
 //======================================================================
 //
 // Blend effects
 //
 //======================================================================
 
 
 // Nice and fast direct pixel manipulation
 QImage& OImageEffect::blend(const QColor& clr, QImage& dst, float opacity)
 {
     if (dst.width() <= 0 || dst.height() <= 0)
         return dst;
 
     if (opacity < 0.0 || opacity > 1.0) {
         qDebug( "WARNING: OImageEffect::blend : invalid opacity. Range [0, 1] ");
         return dst;
     }
 
     int depth = dst.depth();
     if (depth != 32)
         dst = dst.convertDepth(32);
 
     int pixels = dst.width() * dst.height();
     int rcol, gcol, bcol;
     clr.rgb(&rcol, &gcol, &bcol);
 
 #ifdef WORDS_BIGENDIAN   // ARGB (skip alpha)
     register unsigned char *data = (unsigned char *)dst.bits() + 1;
 #else                    // BGRA
     register unsigned char *data = (unsigned char *)dst.bits();
 #endif
 
     for (register int i=0; i<pixels; i++)
     {
 #ifdef WORDS_BIGENDIAN
         *(data++) += (unsigned char)((rcol - *data) * opacity);
         *(data++) += (unsigned char)((gcol - *data) * opacity);
         *(data++) += (unsigned char)((bcol - *data) * opacity);
 #else
         *(data++) += (unsigned char)((bcol - *data) * opacity);
         *(data++) += (unsigned char)((gcol - *data) * opacity);
         *(data++) += (unsigned char)((rcol - *data) * opacity);
 #endif
         data++; // skip alpha
     }
     return dst;
 }
 
 // Nice and fast direct pixel manipulation
 QImage& OImageEffect::blend(QImage& src, QImage& dst, float opacity)
 {
     if (src.width() <= 0 || src.height() <= 0)
         return dst;
     if (dst.width() <= 0 || dst.height() <= 0)
         return dst;
 
     if (src.width() != dst.width() || src.height() != dst.height()) {
         qDebug( "WARNING: OImageEffect::blend : src and destination images are not the same size" );
         return dst;
     }
 
     if (opacity < 0.0 || opacity > 1.0) {
         qDebug( "WARNING: OImageEffect::blend : invalid opacity. Range [0, 1]" );
         return dst;
     }
 
     if (src.depth() != 32) src = src.convertDepth(32);
     if (dst.depth() != 32) dst = dst.convertDepth(32);
 
     int pixels = src.width() * src.height();
 #ifdef WORDS_BIGENDIAN   // ARGB (skip alpha)
     register unsigned char *data1 = (unsigned char *)dst.bits() + 1;
     register unsigned char *data2 = (unsigned char *)src.bits() + 1;
 #else                    // BGRA
     register unsigned char *data1 = (unsigned char *)dst.bits();
     register unsigned char *data2 = (unsigned char *)src.bits();
 #endif
 
     for (register int i=0; i<pixels; i++)
     {
 #ifdef WORDS_BIGENDIAN
         *(data1++) += (unsigned char)((*(data2++) - *data1) * opacity);
         *(data1++) += (unsigned char)((*(data2++) - *data1) * opacity);
         *(data1++) += (unsigned char)((*(data2++) - *data1) * opacity);
 #else
         *(data1++) += (unsigned char)((*(data2++) - *data1) * opacity);
         *(data1++) += (unsigned char)((*(data2++) - *data1) * opacity);
         *(data1++) += (unsigned char)((*(data2++) - *data1) * opacity);
 #endif
         data1++; // skip alpha
         data2++;
     }
 
     return dst;
 }
 
 
 QImage& OImageEffect::blend(QImage &image, float initial_intensity,
                             const QColor &bgnd, GradientType eff,
                             bool anti_dir)
 {
     if (image.width() == 0 || image.height() == 0 || image.depth()!=32 ) {
         qDebug( "WARNING: OImageEffect::blend : invalid image" );
         return image;
     }
 
     int r_bgnd = bgnd.red(), g_bgnd = bgnd.green(), b_bgnd = bgnd.blue();
     int r, g, b;
     int ind;
 
     unsigned int xi, xf, yi, yf;
     unsigned int a;
 
     // check the boundaries of the initial intesity param
     float unaffected = 1;
     if (initial_intensity >  1) initial_intensity =  1;
     if (initial_intensity < -1) initial_intensity = -1;
     if (initial_intensity < 0) {
         unaffected = 1. + initial_intensity;
         initial_intensity = 0;
     }
 
 
     float intensity = initial_intensity;
     float var = 1. - initial_intensity;
 
     if (anti_dir) {
         initial_intensity = intensity = 1.;
         var = -var;
     }
 
     register int x, y;
 
     unsigned int *data =  (unsigned int *)image.bits();
 
     int image_width = image.width(); //Those can't change
     int image_height = image.height();
 
 
     if( eff == VerticalGradient || eff == HorizontalGradient ) {
 
         // set the image domain to apply the effect to
         xi = 0, xf = image_width;
         yi = 0, yf = image_height;
         if (eff == VerticalGradient) {
             if (anti_dir) yf = (int)(image_height * unaffected);
             else yi = (int)(image_height * (1 - unaffected));
         }
         else {
             if (anti_dir) xf = (int)(image_width * unaffected);
             else xi = (int)(image_height * (1 - unaffected));
         }
 
         var /= (eff == VerticalGradient?yf-yi:xf-xi);
 
         int ind_base;
         for (y = yi; y < (int)yf; y++) {
             intensity = eff == VerticalGradient? intensity + var :
                 initial_intensity;
             ind_base = image_width  * y ;
             for (x = xi; x < (int)xf ; x++) {
                 if (eff == HorizontalGradient) intensity += var;
                 ind = x + ind_base;
                 r = qRed  (data[ind]) + (int)(intensity *
                                               (r_bgnd - qRed  (data[ind])));
                 g = qGreen(data[ind]) + (int)(intensity *
                                               (g_bgnd - qGreen(data[ind])));
                 b = qBlue (data[ind]) + (int)(intensity *
                                               (b_bgnd - qBlue (data[ind])));
                 if (r > 255) r = 255; if (r < 0 ) r = 0;
                 if (g > 255) g = 255; if (g < 0 ) g = 0;
                 if (b > 255) b = 255; if (b < 0 ) b = 0;
                 a = qAlpha(data[ind]);
                 data[ind] = qRgba(r, g, b, a);
             }
         }
     }
     else if (eff == DiagonalGradient  || eff == CrossDiagonalGradient) {
         float xvar = var / 2 / image_width;  // / unaffected;
         float yvar = var / 2 / image_height; // / unaffected;
         float tmp;
 
         for (x = 0; x < image_width ; x++) {
             tmp =  xvar * (eff == DiagonalGradient? x : image.width()-x-1);
             ind = x;
             for (y = 0; y < image_height ; y++) {
                 intensity = initial_intensity + tmp + yvar * y;
 
                 r = qRed  (data[ind]) + (int)(intensity *
                                               (r_bgnd - qRed  (data[ind])));
                 g = qGreen(data[ind]) + (int)(intensity *
                                               (g_bgnd - qGreen(data[ind])));
                 b = qBlue (data[ind]) + (int)(intensity *
                                               (b_bgnd - qBlue (data[ind])));
                 if (r > 255) r = 255; if (r < 0 ) r = 0;
                 if (g > 255) g = 255; if (g < 0 ) g = 0;
                 if (b > 255) b = 255; if (b < 0 ) b = 0;
                 a = qAlpha(data[ind]);
                 data[ind] = qRgba(r, g, b, a);
 
                 ind += image_width;
             }
         }
     }
 
     else if (eff == RectangleGradient || eff == EllipticGradient) {
         float xvar;
         float yvar;
 
         for (x = 0; x < image_width / 2 + image_width % 2; x++) {
             xvar = var / image_width  * (image_width - x*2/unaffected-1);
             for (y = 0; y < image_height / 2 + image_height % 2; y++) {
                 yvar = var / image_height   * (image_height - y*2/unaffected -1);
 
                 if (eff == RectangleGradient)
                     intensity = initial_intensity + QMAX(xvar, yvar);
                 else
                     intensity = initial_intensity + sqrt(xvar * xvar + yvar * yvar);
                 if (intensity > 1) intensity = 1;
                 if (intensity < 0) intensity = 0;
 
                 //NW
                 ind = x + image_width  * y ;
                 r = qRed  (data[ind]) + (int)(intensity *
                                               (r_bgnd - qRed  (data[ind])));
                 g = qGreen(data[ind]) + (int)(intensity *
                                               (g_bgnd - qGreen(data[ind])));
                 b = qBlue (data[ind]) + (int)(intensity *
                                               (b_bgnd - qBlue (data[ind])));
                 if (r > 255) r = 255; if (r < 0 ) r = 0;
                 if (g > 255) g = 255; if (g < 0 ) g = 0;
                 if (b > 255) b = 255; if (b < 0 ) b = 0;
                 a = qAlpha(data[ind]);
                 data[ind] = qRgba(r, g, b, a);
 
                 //NE
                 ind = image_width - x - 1 + image_width  * y ;
                 r = qRed  (data[ind]) + (int)(intensity *
                                               (r_bgnd - qRed  (data[ind])));
                 g = qGreen(data[ind]) + (int)(intensity *
                                               (g_bgnd - qGreen(data[ind])));
                 b = qBlue (data[ind]) + (int)(intensity *
                                               (b_bgnd - qBlue (data[ind])));
                 if (r > 255) r = 255; if (r < 0 ) r = 0;
                 if (g > 255) g = 255; if (g < 0 ) g = 0;
                 if (b > 255) b = 255; if (b < 0 ) b = 0;
                 a = qAlpha(data[ind]);
                 data[ind] = qRgba(r, g, b, a);
             }
         }
 
         //CT  loop is doubled because of stupid central row/column issue.
         //    other solution?
         for (x = 0; x < image_width / 2; x++) {
             xvar = var / image_width  * (image_width - x*2/unaffected-1);
             for (y = 0; y < image_height / 2; y++) {
                 yvar = var / image_height   * (image_height - y*2/unaffected -1);
 
                 if (eff == RectangleGradient)
                     intensity = initial_intensity + QMAX(xvar, yvar);
                 else
                     intensity = initial_intensity + sqrt(xvar * xvar + yvar * yvar);
                 if (intensity > 1) intensity = 1;
                 if (intensity < 0) intensity = 0;
 
                 //SW
                 ind = x + image_width  * (image_height - y -1) ;
                 r = qRed  (data[ind]) + (int)(intensity *
                                               (r_bgnd - qRed  (data[ind])));
                 g = qGreen(data[ind]) + (int)(intensity *
                                               (g_bgnd - qGreen(data[ind])));
                 b = qBlue (data[ind]) + (int)(intensity *
                                               (b_bgnd - qBlue (data[ind])));
                 if (r > 255) r = 255; if (r < 0 ) r = 0;
                 if (g > 255) g = 255; if (g < 0 ) g = 0;
                 if (b > 255) b = 255; if (b < 0 ) b = 0;
                 a = qAlpha(data[ind]);
                 data[ind] = qRgba(r, g, b, a);
 
                 //SE
                 ind = image_width-x-1 + image_width * (image_height - y - 1) ;
                 r = qRed  (data[ind]) + (int)(intensity *
                                               (r_bgnd - qRed  (data[ind])));
                 g = qGreen(data[ind]) + (int)(intensity *
                                               (g_bgnd - qGreen(data[ind])));
                 b = qBlue (data[ind]) + (int)(intensity *
                                               (b_bgnd - qBlue (data[ind])));
                 if (r > 255) r = 255; if (r < 0 ) r = 0;
                 if (g > 255) g = 255; if (g < 0 ) g = 0;
                 if (b > 255) b = 255; if (b < 0 ) b = 0;
                 a = qAlpha(data[ind]);
                 data[ind] = qRgba(r, g, b, a);
             }
         }
     }
     else qDebug( "OImageEffect::blend effect not implemented" );
     return image;
 }
 
 // Not very efficient as we create a third big image...
 //
 QImage& OImageEffect::blend(QImage &image1, QImage &image2,
                             GradientType gt, int xf, int yf)
 {
   if (image1.width() == 0 || image1.height() == 0 ||
       image2.width() == 0 || image2.height() == 0)
     return image1;
 
   QImage image3;
 
   image3 = OImageEffect::unbalancedGradient(image1.size(),
                                     QColor(0,0,0), QColor(255,255,255),
                                     gt, xf, yf, 0);
 
   return blend(image1,image2,image3, Red); // Channel to use is arbitrary
 }
 
 // Blend image2 into image1, using an RBG channel of blendImage
 //
 QImage& OImageEffect::blend(QImage &image1, QImage &image2,
                             QImage &blendImage, RGBComponent channel)
 {
     if (image1.width() == 0 || image1.height() == 0 ||
         image2.width() == 0 || image2.height() == 0 ||
         blendImage.width() == 0 || blendImage.height() == 0) {
             qDebug( "OImageEffect::blend effect invalid image" );
             return image1;
     }
 
     int r, g, b;
     int ind1, ind2, ind3;
 
     unsigned int x1, x2, x3, y1, y2, y3;
     unsigned int a;
 
     register int x, y;
 
     // for image1 and image2, we only handle depth 32
     if (image1.depth()<32) image1 = image1.convertDepth(32);
     if (image2.depth()<32) image2 = image2.convertDepth(32);
 
     // for blendImage, we handle depth 8 and 32
     if (blendImage.depth()<8) blendImage = blendImage.convertDepth(8);
 
     unsigned int *colorTable3 = (blendImage.depth()==8) ?
                                  blendImage.colorTable():0;
 
     unsigned int *data1 =  (unsigned int *)image1.bits();
     unsigned int *data2 =  (unsigned int *)image2.bits();
     unsigned int *data3   =  (unsigned int *)blendImage.bits();
     unsigned char *data3b =  (unsigned char *)blendImage.bits();
     unsigned int color3;
 
     x1 = image1.width();     y1 = image1.height();
     x2 = image2.width();     y2 = image2.height();
     x3 = blendImage.width(); y3 = blendImage.height();
 
     for (y = 0; y < (int)y1; y++) {
         ind1 = x1*y;
         ind2 = x2*(y%y2);
         ind3 = x3*(y%y3);
 
         x=0;
         while(x < (int)x1) {
           color3 = (colorTable3) ? colorTable3[data3b[ind3]] : data3[ind3];
 
           a = (channel == Red) ? qRed(color3) :
               (channel == Green) ? qGreen(color3) :
               (channel == Blue) ? qBlue(color3) : qGray(color3);
 
           r = (a*qRed(data1[ind1]) + (256-a)*qRed(data2[ind2]))/256;
           g = (a*qGreen(data1[ind1]) + (256-a)*qGreen(data2[ind2]))/256;
           b = (a*qBlue(data1[ind1]) + (256-a)*qBlue(data2[ind2]))/256;
 
           a = qAlpha(data1[ind1]);
           data1[ind1] = qRgba(r, g, b, a);
 
           ind1++; ind2++; ind3++; x++;
           if ( (x%x2) ==0) ind2 -= x2;
           if ( (x%x3) ==0) ind3 -= x3;
         }
     }
     return image1;
 }
 
 
 //======================================================================
 //
 // Hash effects
 //
 //======================================================================
 
 unsigned int OImageEffect::lHash(unsigned int c)
 {
     unsigned char r = qRed(c), g = qGreen(c), b = qBlue(c), a = qAlpha(c);
     unsigned char nr, ng, nb;
     nr =(r >> 1) + (r >> 2); nr = nr > r ? 0 : nr;
     ng =(g >> 1) + (g >> 2); ng = ng > g ? 0 : ng;
     nb =(b >> 1) + (b >> 2); nb = nb > b ? 0 : nb;
 
     return qRgba(nr, ng, nb, a);
 }
 
 
 // -----------------------------------------------------------------------------
 
 unsigned int OImageEffect::uHash(unsigned int c)
 {
     unsigned char r = qRed(c), g = qGreen(c), b = qBlue(c), a = qAlpha(c);
     unsigned char nr, ng, nb;
     nr = r + (r >> 3); nr = nr < r ? ~0 : nr;
     ng = g + (g >> 3); ng = ng < g ? ~0 : ng;
     nb = b + (b >> 3); nb = nb < b ? ~0 : nb;
 
     return qRgba(nr, ng, nb, a);
 }
 
 
 // -----------------------------------------------------------------------------
 
 QImage& OImageEffect::hash(QImage &image, Lighting lite, unsigned int spacing)
 {
     if (image.width() == 0 || image.height() == 0) {
         qDebug( "OImageEffect::hash effect invalid image" );
         return image;
     }
 
     register int x, y;
     unsigned int *data =  (unsigned int *)image.bits();
     unsigned int ind;
 
     //CT no need to do it if not enough space
     if ((lite == NorthLite ||
          lite == SouthLite)&&
         (unsigned)image.height() < 2+spacing) return image;
     if ((lite == EastLite ||
          lite == WestLite)&&
         (unsigned)image.height() < 2+spacing) return image;
 
     if (lite == NorthLite || lite == SouthLite) {
         for (y = 0 ; y < image.height(); y = y + 2 + spacing) {
             for (x = 0; x < image.width(); x++) {
                 ind = x + image.width() * y;
                 data[ind] = lite==NorthLite?uHash(data[ind]):lHash(data[ind]);
 
                 ind = ind + image.width();
                 data[ind] = lite==NorthLite?lHash(data[ind]):uHash(data[ind]);
             }
         }
     }
 
     else if (lite == EastLite || lite == WestLite) {
         for (y = 0 ; y < image.height(); y++) {
             for (x = 0; x < image.width(); x = x + 2 + spacing) {
                 ind = x + image.width() * y;
                 data[ind] = lite==EastLite?uHash(data[ind]):lHash(data[ind]);
 
                 ind++;
                 data[ind] = lite==EastLite?lHash(data[ind]):uHash(data[ind]);
             }
         }
     }
 
     else if (lite == NWLite || lite == SELite) {
         for (y = 0 ; y < image.height(); y++) {
             for (x = 0;
                  x < (int)(image.width() - ((y & 1)? 1 : 0) * spacing);
                  x = x + 2 + spacing) {
                 ind = x + image.width() * y + ((y & 1)? 1 : 0);
                 data[ind] = lite==NWLite?uHash(data[ind]):lHash(data[ind]);
 
                 ind++;
                 data[ind] = lite==NWLite?lHash(data[ind]):uHash(data[ind]);
             }
         }
     }
 
     else if (lite == SWLite || lite == NELite) {
         for (y = 0 ; y < image.height(); y++) {
             for (x = 0  + ((y & 1)? 1 : 0); x < image.width(); x = x + 2 + spacing) {
                 ind = x + image.width() * y - ((y & 1)? 1 : 0);
                 data[ind] = lite==SWLite?uHash(data[ind]):lHash(data[ind]);
 
                 ind++;
                 data[ind] = lite==SWLite?lHash(data[ind]):uHash(data[ind]);
             }
         }
     }
 
     return image;
 }
 
 
 //======================================================================
 //
 // Flatten effects
 //
 //======================================================================
 
 QImage& OImageEffect::flatten(QImage &img, const QColor &ca,
                             const QColor &cb, int ncols)
 {
     if (img.width() == 0 || img.height() == 0)
       return img;
 
     // a bitmap is easy...
     if (img.depth() == 1) {
         img.setColor(0, ca.rgb());
         img.setColor(1, cb.rgb());
         return img;
     }
 
     int r1 = ca.red(); int r2 = cb.red();
     int g1 = ca.green(); int g2 = cb.green();
     int b1 = ca.blue(); int b2 = cb.blue();
     int min = 0, max = 255;
 
     QRgb col;
 
     // Get minimum and maximum greylevel.
     if (img.numColors()) {
         // pseudocolor
         for (int i = 0; i < img.numColors(); i++) {
             col = img.color(i);
             int mean = (qRed(col) + qGreen(col) + qBlue(col)) / 3;
             min = QMIN(min, mean);
             max = QMAX(max, mean);
         }
     } else {
         // truecolor
         for (int y=0; y < img.height(); y++)
             for (int x=0; x < img.width(); x++) {
                 col = img.pixel(x, y);
                 int mean = (qRed(col) + qGreen(col) + qBlue(col)) / 3;
                 min = QMIN(min, mean);
                 max = QMAX(max, mean);
             }
     }
 
     // Conversion factors
     float sr = ((float) r2 - r1) / (max - min);
     float sg = ((float) g2 - g1) / (max - min);
     float sb = ((float) b2 - b1) / (max - min);
 
 
     // Repaint the image
     if (img.numColors()) {
         for (int i=0; i < img.numColors(); i++) {
             col = img.color(i);
             int mean = (qRed(col) + qGreen(col) + qBlue(col)) / 3;
             int r = (int) (sr * (mean - min) + r1 + 0.5);
             int g = (int) (sg * (mean - min) + g1 + 0.5);
             int b = (int) (sb * (mean - min) + b1 + 0.5);
             img.setColor(i, qRgba(r, g, b, qAlpha(col)));
         }
     } else {
         for (int y=0; y < img.height(); y++)
             for (int x=0; x < img.width(); x++) {
                 col = img.pixel(x, y);
                 int mean = (qRed(col) + qGreen(col) + qBlue(col)) / 3;
                 int r = (int) (sr * (mean - min) + r1 + 0.5);
                 int g = (int) (sg * (mean - min) + g1 + 0.5);
                 int b = (int) (sb * (mean - min) + b1 + 0.5);
                 img.setPixel(x, y, qRgba(r, g, b, qAlpha(col)));
             }
     }
 
 
     // Dither if necessary
     if ( (ncols <= 0) || ((img.numColors() != 0) && (img.numColors() <= ncols)))
         return img;
 
     if (ncols == 1) ncols++;
     if (ncols > 256) ncols = 256;
 
     QColor *pal = new QColor[ncols];
     sr = ((float) r2 - r1) / (ncols - 1);
     sg = ((float) g2 - g1) / (ncols - 1);
     sb = ((float) b2 - b1) / (ncols - 1);
 
     for (int i=0; i<ncols; i++)
         pal[i] = QColor(r1 + int(sr*i), g1 + int(sg*i), b1 + int(sb*i));
 
     dither(img, pal, ncols);
 
     delete[] pal;
     return img;
 }
 
 
 //======================================================================
 //
 // Fade effects
 //
 //======================================================================
 
 QImage& OImageEffect::fade(QImage &img, float val, const QColor &color)
 {
     if (img.width() == 0 || img.height() == 0)
       return img;
 
     // We don't handle bitmaps
     if (img.depth() == 1)
         return img;
 
     unsigned char tbl[256];
     for (int i=0; i<256; i++)
         tbl[i] = (int) (val * i + 0.5);
 
     int red = color.red();
     int green = color.green();
     int blue = color.blue();
 
     QRgb col;
     int r, g, b, cr, cg, cb;
 
     if (img.depth() <= 8) {
         // pseudo color
         for (int i=0; i<img.numColors(); i++) {
             col = img.color(i);
             cr = qRed(col); cg = qGreen(col); cb = qBlue(col);
             if (cr > red)
                 r = cr - tbl[cr - red];
             else
                 r = cr + tbl[red - cr];
             if (cg > green)
                 g = cg - tbl[cg - green];
             else
                 g = cg + tbl[green - cg];
             if (cb > blue)
                 b = cb - tbl[cb - blue];
             else
                 b = cb + tbl[blue - cb];
             img.setColor(i, qRgba(r, g, b, qAlpha(col)));
         }
 
     } else {
         // truecolor
         for (int y=0; y<img.height(); y++) {
             QRgb *data = (QRgb *) img.scanLine(y);
             for (int x=0; x<img.width(); x++) {
                 col = *data;
                 cr = qRed(col); cg = qGreen(col); cb = qBlue(col);
                 if (cr > red)
                     r = cr - tbl[cr - red];
                 else
                     r = cr + tbl[red - cr];
                 if (cg > green)
                     g = cg - tbl[cg - green];
                 else
                     g = cg + tbl[green - cg];
                 if (cb > blue)
                     b = cb - tbl[cb - blue];
                 else
                     b = cb + tbl[blue - cb];
                 *data++ = qRgba(r, g, b, qAlpha(col));
             }
         }
     }
 
     return img;
 }
 
 //======================================================================
 //
 // Color effects
 //
 //======================================================================
 
 // This code is adapted from code (C) Rik Hemsley <rik@kde.org>
 //
 // The formula used (r + b + g) /3 is different from the qGray formula
 // used by Qt.  This is because our formula is much much faster.  If,
 // however, it turns out that this is producing sub-optimal images,
 // then it will have to change (kurt)
 //
 // It does produce lower quality grayscale ;-) Use fast == true for the fast
 // algorithm, false for the higher quality one (mosfet).
 QImage& OImageEffect::toGray(QImage &img, bool fast)
 {
     if (img.width() == 0 || img.height() == 0)
       return img;
 
     if(fast){
         if (img.depth() == 32) {
             register uchar * r(img.bits());
             register uchar * g(img.bits() + 1);
             register uchar * b(img.bits() + 2);
 
             uchar * end(img.bits() + img.numBytes());
 
             while (r != end) {
 
                 *r = *g = *b = (((*r + *g) >> 1) + *b) >> 1; // (r + b + g) / 3
 
                 r += 4;
                 g += 4;
                 b += 4;
             }
         }
         else
         {
             for (int i = 0; i < img.numColors(); i++)
             {
                 register uint r = qRed(img.color(i));
                 register uint g = qGreen(img.color(i));
                 register uint b = qBlue(img.color(i));
 
                 register uint gray = (((r + g) >> 1) + b) >> 1;
                 img.setColor(i, qRgba(gray, gray, gray, qAlpha(img.color(i))));
             }
         }
     }
     else{
         int pixels = img.depth() > 8 ? img.width()*img.height() :
             img.numColors();
         unsigned int *data = img.depth() > 8 ? (unsigned int *)img.bits() :
             (unsigned int *)img.colorTable();
         int val, i;
         for(i=0; i < pixels; ++i){
             val = qGray(data[i]);
             data[i] = qRgba(val, val, val, qAlpha(data[i]));
         }
     }
     return img;
 }
 
 // CT 29Jan2000 - desaturation algorithms
 QImage& OImageEffect::desaturate(QImage &img, float desat)
 {
     if (img.width() == 0 || img.height() == 0)