add interlaceColor, and support interlaced gradients

render/gradient.c

@@ -82,6 +82,23 @@ void RrRender(RrAppearance *a, int w, int h)
                           a->surface.relief==RR_RELIEF_RAISED);
         }
     }
+
+    if (a->surface.interlaced) {
+        int i;
+        RrPixel32 *p;
+
+        r = a->surface.interlace_color->r;
+        g = a->surface.interlace_color->g;
+        b = a->surface.interlace_color->b;
+        current = (r << RrDefaultRedOffset)
+            + (g << RrDefaultGreenOffset)
+            + (b << RrDefaultBlueOffset);
+        p = data;
+        for (i = 0; i < h; i += 2, p += w)
+            for (x = 0; x < w; ++x, ++p)
+                *p = current;
+    }
+
 }
 
 static void highlight(RrPixel32 *x, RrPixel32 *y, gboolean raised)
@@ -166,7 +183,8 @@ static void gradient_solid(RrAppearance *l, int w, int h)
 
     if (sp->interlaced) {
         for (i = 0; i < h; i += 2)
-            XDrawLine(RrDisplay(l->inst), l->pixmap, RrColorGC(sp->secondary),
+            XDrawLine(RrDisplay(l->inst), l->pixmap,
+                      RrColorGC(sp->interlace_color),
                       0, i, w, i);
     }
 

render/render.h

@@ -67,6 +67,7 @@ struct _RrSurface {
     RrColor *border_color;
     RrColor *bevel_dark; 
     RrColor *bevel_light;
+    RrColor *interlace_color;
     gboolean interlaced;
     gboolean border;
     RrAppearance *parent;

render/theme.c

@@ -1170,13 +1170,15 @@ static gboolean read_appearance(XrmDatabase db, const RrInstance *inst,
                                 gboolean allow_trans)
 {
     gboolean ret = FALSE;
-    char *rclass = create_class_name(rname), *cname, *ctoname, *bcname;
+    char *rclass = create_class_name(rname);
+    char *cname, *ctoname, *bcname, *icname;
     char *rettype;
     XrmValue retvalue;
 
     cname = g_strconcat(rname, ".color", NULL);
     ctoname = g_strconcat(rname, ".colorTo", NULL);
     bcname = g_strconcat(rname, ".borderColor", NULL);
+    icname = g_strconcat(rname, ".interlaceColor", NULL);
 
     if (XrmGetResource(db, rname, rclass, &rettype, &retvalue) &&
 	retvalue.addr != NULL) {
@@ -1195,9 +1197,14 @@ static gboolean read_appearance(XrmDatabase db, const RrInstance *inst,
 	    if (!read_color(db, inst, bcname,
 			    &value->surface.border_color))
 		value->surface.border_color = RrColorNew(inst, 0, 0, 0);
+        if (value->surface.interlaced)
+	    if (!read_color(db, inst, icname,
+			    &value->surface.interlace_color))
+		value->surface.interlace_color = RrColorNew(inst, 0, 0, 0);
 	ret = TRUE;
     }
 
+    g_free(icname);
     g_free(bcname);
     g_free(ctoname);
     g_free(cname);