1 files changed, 324 insertions, 0 deletions

diff --git a/noncore/styles/theme/ogfxeffect.cpp b/noncore/styles/theme/ogfxeffect.cpp
new file mode 100644
index 0000000..a991728
--- a/dev/null
+++ b/noncore/styles/theme/ogfxeffect.cpp
@@ -0,0 +1,324 @@
+/* This file is part of the KDE libraries
+    Copyright (C) 1998, 1999 Christian Tibirna <ctibirna@total.net>
+              (C) 1998, 1999 Daniel M. Duley <mosfet@kde.org>
+              (C) 1998, 1999 Dirk A. Mueller <mueller@kde.org>
+
+*/
+
+// $Id$
+
+#include <qimage.h>
+#include <qpainter.h>
+
+#include "ogfxeffect.h"
+
+
+//======================================================================
+//
+// Gradient effects
+//
+//======================================================================
+
+
+QPixmap& OGfxEffect::gradient(QPixmap &pixmap, const QColor &ca,
+        const QColor &cb, GradientType eff, int ncols)
+{
+    if(pixmap.depth() > 8 &&
+       (eff == VerticalGradient || eff == HorizontalGradient)) {
+
+        int rDiff, gDiff, bDiff;
+        int rca, gca, bca /*, rcb, gcb, bcb*/;
+
+        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());
+
+        register int rl = rca << 16;
+        register int gl = gca << 16;
+        register int bl = bca << 16;
+
+        int rcdelta = ((1<<16) / (eff == VerticalGradient ? pixmap.height() : pixmap.width())) * rDiff;
+        int gcdelta = ((1<<16) / (eff == VerticalGradient ? pixmap.height() : pixmap.width())) * gDiff;
+        int bcdelta = ((1<<16) / (eff == VerticalGradient ? pixmap.height() : pixmap.width())) * bDiff;
+
+        QPainter p(&pixmap);
+
+        // these for-loops could be merged, but the if's in the inner loop
+        // would make it slow
+        switch(eff) {
+        case VerticalGradient:
+            for ( y = 0; y < pixmap.height(); y++ ) {
+                rl += rcdelta;
+                gl += gcdelta;
+                bl += bcdelta;
+
+                p.setPen(QColor(rl>>16, gl>>16, bl>>16));
+                p.drawLine(0, y, pixmap.width()-1, y);
+            }
+            break;
+        case HorizontalGradient:
+            for( x = 0; x < pixmap.width(); x++) {
+                rl += rcdelta;
+                gl += gcdelta;
+                bl += bcdelta;
+
+                p.setPen(QColor(rl>>16, gl>>16, bl>>16));
+                p.drawLine(x, 0, x, pixmap.height()-1);
+            }
+            break;
+        default:
+            ;
+        }
+    }
+    else {
+//        QImage image = OGfxEffect::gradient(pixmap.size(), ca, cb,
+//                                              (OGfxEffect::GradientType) eff, ncols);
+//        pixmap.convertFromImage(image);
+    }
+
+    return pixmap;
+}
+
+
+//======================================================================
+//
+// Blend effects
+//
+//======================================================================
+
+
+QPixmap& OGfxEffect::blend(QPixmap &pixmap, float initial_intensity,
+                          const QColor &bgnd, GradientType eff,
+                          bool anti_dir, int ncols)
+{
+    QImage image = pixmap.convertToImage();
+    OGfxEffect::blend(image, initial_intensity, bgnd, eff, anti_dir);
+
+    unsigned int tmp;
+
+        if ( pixmap. depth ( ) <= 8 )
+                image. convertDepth ( pixmap. depth ( ));
+
+    pixmap.convertFromImage(image);
+
+    return pixmap;
+}
+
+
+QImage& OGfxEffect::blend(QImage &image, float initial_intensity,
+                            const QColor &bgnd, GradientType eff,
+                            bool anti_dir)
+{
+    if (image.width() == 0 || image.height() == 0) {
+      qDebug ( "Invalid image\n" );
+      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();
+
+    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);
+
+        for (y = yi; y < (int)yf; y++) {
+            intensity = eff == VerticalGradient? intensity + var :
+                initial_intensity;
+            for (x = xi; x < (int)xf ; x++) {
+                if (eff == HorizontalGradient) intensity += var;
+                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);
+            }
+        }
+    }
+    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);
+            for (y = 0; y < image.height() ; y++) {
+                intensity = initial_intensity + tmp + yvar * y;
+                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);
+            }
+        }
+    }
+
+    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 ( "not implemented\n" );
+
+    return image;
+}
+
+#if 0
+// Not very efficient as we create a third big image...
+//
+QImage& KQGfxEffect::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 = KQGfxEffect::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
+}
+#endif