+ SETUP(x, sf->secondary, sf->primary, w/2);
+ for (x = w/2 - 1; x > 0; --x) { /* 0 -> w-1 */
+ current = COLOR(x);
+ datav = data;
+ for (y = h - 1; y >= 0; --y) { /* 0 -> h */
+ *datav = current;
+ datav += w;
+ }
+ ++data;
+
+ NEXT(x);
+ }
+ }
+ current = COLOR(x);
+ for (y = h - 1; y >= 0; --y) /* 0 -> h */
+ *(data + y * w) = current;
+}
+
+static void gradient_vertical(RrSurface *sf, gint w, gint h)
+{
+ gint x, y;
+ RrPixel32 *data = sf->pixel_data;
+ RrPixel32 current;
+
+ VARS(y);
+ SETUP(y, sf->primary, sf->secondary, h);
+
+ for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
+ current = COLOR(y);
+ for (x = w - 1; x >= 0; --x) /* 0 -> w */
+ *(data++) = current;
+
+ NEXT(y);
+ }
+ current = COLOR(y);
+ for (x = w - 1; x >= 0; --x) /* 0 -> w */
+ *(data++) = current;
+}
+
+
+static void gradient_diagonal(RrSurface *sf, gint w, gint h)
+{
+ gint x, y;
+ RrPixel32 *data = sf->pixel_data;
+ RrColor left, right;
+ RrColor extracorner;
+
+ VARS(lefty);
+ VARS(righty);
+ VARS(x);
+
+ extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
+ extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
+ extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
+
+ SETUP(lefty, sf->primary, (&extracorner), h);
+ SETUP(righty, (&extracorner), sf->secondary, h);
+
+ for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
+ COLOR_RR(lefty, (&left));
+ COLOR_RR(righty, (&right));
+
+ SETUP(x, (&left), (&right), w);
+
+ for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
+ *(data++) = COLOR(x);
+
+ NEXT(x);
+ }
+ *(data++) = COLOR(x);
+
+ NEXT(lefty);
+ NEXT(righty);
+ }
+ COLOR_RR(lefty, (&left));
+ COLOR_RR(righty, (&right));
+
+ SETUP(x, (&left), (&right), w);
+
+ for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
+ *(data++) = COLOR(x);
+
+ NEXT(x);
+ }
+ *data = COLOR(x);
+}
+
+static void gradient_crossdiagonal(RrSurface *sf, gint w, gint h)
+{
+ gint x, y;
+ RrPixel32 *data = sf->pixel_data;
+ RrColor left, right;
+ RrColor extracorner;
+
+ VARS(lefty);
+ VARS(righty);
+ VARS(x);
+
+ extracorner.r = (sf->primary->r + sf->secondary->r) / 2;
+ extracorner.g = (sf->primary->g + sf->secondary->g) / 2;
+ extracorner.b = (sf->primary->b + sf->secondary->b) / 2;
+
+ SETUP(lefty, (&extracorner), sf->secondary, h);
+ SETUP(righty, sf->primary, (&extracorner), h);
+
+ for (y = h - 1; y > 0; --y) { /* 0 -> h-1 */
+ COLOR_RR(lefty, (&left));
+ COLOR_RR(righty, (&right));
+
+ SETUP(x, (&left), (&right), w);
+
+ for (x = w - 1; x > 0; --x) { /* 0 -> w-1 */
+ *(data++) = COLOR(x);
+
+ NEXT(x);
+ }
+ *(data++) = COLOR(x);
+
+ NEXT(lefty);
+ NEXT(righty);