From c894fbcb56b5d7f5e1cf0bd3c17dcf27aec80b91 Mon Sep 17 00:00:00 2001
From: lecoanet
Date: Fri, 30 Mar 2001 12:13:15 +0000
Subject: Premi�re tentative d'am�lioration des gradients.

---
 generic/Draw.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 64 insertions(+), 16 deletions(-)

(limited to 'generic/Draw.c')

diff --git a/generic/Draw.c b/generic/Draw.c
index b8f315e..c77d59e 100644
--- a/generic/Draw.c
+++ b/generic/Draw.c
@@ -859,6 +859,7 @@ DrawRectangleGradient(struct _WidgetInfo	*wi,
 		      ZnColorGradient		grad_color,
 		      XRectangle		*bbox)
 {
+  static int	s[] = { 0, 13, 11, 9, 7, 5, 3, 1 };
   int		steps = ZnColorGradientSpan(grad_color);
   ZnReal	d1, d2;
   int		angle = grad_geom->angle;
@@ -866,7 +867,7 @@ DrawRectangleGradient(struct _WidgetInfo	*wi,
   int		*optr, *hptr;
   short		yorig, ycorner;
   ZnBool	dir;
-  
+  XColor	*col;
 
   /*
    * We can only hangle 0, 90, 180, 270.
@@ -893,12 +894,14 @@ DrawRectangleGradient(struct _WidgetInfo	*wi,
     d1 = grad_geom->d1*bbox->height/100.0;
     d2 = bbox->height*(1.0-grad_geom->d2/100.0);
   }
+  d1 = REAL_TO_INT(d1);
+  d2 = REAL_TO_INT(d2);
   
   dir = True;
   if ((angle == 180) || (angle == 270)) {
     dir = False;
   }
-#if 1
+#if 0
   XSetFillStyle(wi->dpy, wi->gc, FillSolid);
   c = ycorner;
   for (i = 2, j = steps-1; i < steps; i += 2, j--) {
@@ -931,25 +934,70 @@ DrawRectangleGradient(struct _WidgetInfo	*wi,
    * Draw over with a 50% gray pattern to smooth the color
    * waves.
    */
-  XSetFillStyle(wi->dpy, wi->gc, FillStippled);
-  XSetStipple(wi->dpy, wi->gc, wi->alpha_stipples[7]);
-  c = REAL_TO_INT(ycorner - d2 / steps);
-  for (i = 3, j = steps-2; i <= steps; i += 2, j--) {
-    *optr = REAL_TO_INT(ycorner - (i * d2 / steps));
+#if 1
+  /*
+   * First draw the from the gradient end.
+   */
+  XSetTSOrigin(wi->dpy, wi->gc, bbox->x, bbox->y);
+  c = ycorner;
+  for (i = 0, j = steps-1; i < ((steps-1) * 4); i++) {
+    *optr = REAL_TO_INT(ycorner - ((i + 1) * d2 / (steps * 4)));
     *hptr = c - *optr;
-    XSetForeground(wi->dpy, wi->gc,
-		   ZnPixel(ZnColorGradientColor(wi->win, grad_color,
-						dir?j:steps-1-j)));
+    XSetFillStyle(wi->dpy, wi->gc, FillSolid);
+    col = ZnColorGradientColor(wi->win, grad_color, dir?j:steps-1-j);
+    XSetForeground(wi->dpy, wi->gc, ZnPixel(col));
     XFillRectangle(wi->dpy, wi->draw_buffer, wi->gc, x, y, w, h);
+    if (i % 8) {
+      XSetFillStyle(wi->dpy, wi->gc, FillStippled);
+      XSetStipple(wi->dpy, wi->gc, wi->alpha_stipples[s[i%8]]);
+      XSetForeground(wi->dpy, wi->gc,
+		     ZnPixel(ZnColorGradientColor(wi->win, grad_color,
+						  dir?j+1:steps-j)));
+      XFillRectangle(wi->dpy, wi->draw_buffer, wi->gc, x, y, w, h);
+    }
+    else {
+      /*printf("remplissage en %d %d %d (%d)\n",
+	col->red, col->green, col->blue, dir?j:steps-1-j);*/
+      j--;
+    }
     c = *optr;
   }
-  *optr = REAL_TO_INT(yorig + d1 / steps);
-  for (i = 3, j = 1; i <= steps; i += 2, j++) {
-    c = REAL_TO_INT(yorig + (i * d1 / steps));
+  y_d2 = *optr;
+  /*
+   * Then draw from the gradient start.
+   */
+#if 1
+  *optr = yorig;
+  for (i = 0, j = 0; i < ((steps-1) * 4); i++) {
+    c = REAL_TO_INT(yorig + ((i + 1) * d1 / (steps * 4)));
     *hptr = c - *optr;
-    XSetForeground(wi->dpy, wi->gc,
-		   ZnPixel(ZnColorGradientColor(wi->win, grad_color, dir?j:steps-1-j)));
+    XSetFillStyle(wi->dpy, wi->gc, FillSolid);
+    col = ZnColorGradientColor(wi->win, grad_color, dir?j:steps-1-j);
+    XSetForeground(wi->dpy, wi->gc, ZnPixel(col));
     XFillRectangle(wi->dpy, wi->draw_buffer, wi->gc, x, y, w, h);
+    if (i % 8) {
+      XSetFillStyle(wi->dpy, wi->gc, FillStippled);
+      XSetStipple(wi->dpy, wi->gc, wi->alpha_stipples[s[i%8]]);
+      XSetForeground(wi->dpy, wi->gc,
+		     ZnPixel(ZnColorGradientColor(wi->win, grad_color,
+						  dir?j-1:steps-2-j)));
+      XFillRectangle(wi->dpy, wi->draw_buffer, wi->gc, x, y, w, h);
+    }
+    else {
+      /*printf("remplissage en %d %d %d (%d)\n",
+	col->red, col->green, col->blue, dir?j:steps-1-j);*/
+      j++;
+    }
     *optr = c;
-  }
+  }  
+#endif
+  /*
+   * Last draw the central part.
+   */
+  *hptr = y_d2 - *optr;
+  XSetFillStyle(wi->dpy, wi->gc, FillSolid);
+  XSetForeground(wi->dpy, wi->gc,
+		   ZnPixel(ZnColorGradientMidColor(wi->win, grad_color)));
+  XFillRectangle(wi->dpy, wi->draw_buffer, wi->gc, x, y, w, h);
+#endif
 }
-- 
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