Greyscale bars/Display: Difference between revisions

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@@ Line 93: / Line 93: @@
 }
 /* make a shaded pixbuf */
-void expose_event (GtkWidget *widget,GdkEventExpose *event,gpointer data) {
+int expose_event (GtkWidget *widget,GdkEventExpose *event,gpointer data) {
-    int r,c,f,x=0;
+    int r,c,x=0;
     cairo_t *cr;
     cr = gdk_cairo_create (widget->window);
     cairo_scale (cr,5,50);
     cairo_set_line_width (cr,1.2);
-    for (r=0;r<4;r++s) {
+    for (r=0;r<4;r++) {
         c = (r&1)*64-(r%2);
+        do gsplot (cr,x++%64,r,c/(1<<(3-r))/(8*(1<<r)-1.0));
-        do { /* some dyslexic maths */
-            f=1<<3-r;
+        while ((c+=2*!(r%2)-1)!=(!(r%2))*64-(r%2));
-            gsplot (cr,x++%64,r,c/f*63.0/(64.0/f-1)/63.0);
-            c+=2*!(r%2)-1;
-        } while (c != (!(r%2))*64-(r%2));
     } cairo_destroy (cr);
     return FALSE;