+ unsigned w = size & 0xffff, h = (size >> 16) & 0xffff;
+ unsigned x, y, i, j, n;
+
+ const char colourchars[16] = "#rgybmc-+RGYBMC ";
+ unsigned long palette[16] = {
+ 0x000000, 0x800000, 0x008000, 0x808000,
+ 0x000080, 0x800080, 0x008080, 0xc0c0c0,
+ 0x808080, 0xff0000, 0x00ff00, 0xffff00,
+ 0x0000ff, 0xff00ff, 0x00ffff, 0xffffff
+ };
+
+ unsigned long prev_colour = 0;
+ unsigned used_colours, v;
+
+ size = (unsigned long) w * h;
+ for (i = 0; i < size; i++) {
+ unsigned long *p = &icon_buf[i];
+ char *c;
+
+ x = i%w, y=i/w;
+
+ switch (*p & 0xffffff) {
+ /* red */
+ case COLOUR0_PRIMARY:
+ *p = y&1 ? ( x&1 ? 'r' : 'm' ) : ( x&1 ? 'y' : 'r' );
+ break;
+ case COLOUR0_LIGHT:
+ *p = (x^y)&1 ? '+' : 'r';
+ break;
+ case COLOUR0_DARK:
+ *p = 'r';
+ break;
+ /* orange */
+ case COLOUR1_PRIMARY:
+ *p = y&1 ? 'y' : x&1 ? '+' : 'R';
+ break;
+ case COLOUR1_LIGHT:
+ *p = (x^y)&1 ? '+' : 'y';
+ break;
+ case COLOUR1_DARK:
+ *p = (x^y)&1 ? 'r' : 'y';
+ break;
+ /* yellow */
+ case COLOUR2_PRIMARY:
+ *p = (x^y)&1 ? '+' : 'Y';
+ break;
+ case COLOUR2_LIGHT:
+ *p = (x^y)&1 ? '-' : 'Y';
+ break;
+ case COLOUR2_DARK:
+ *p = (x^y)&1 ? '+' : 'Y';
+ if (is_edge(x, y, w, h, p, COLOUR2_DARK))
+ *p = (x^y)&1 ? '+' : 'y';
+ break;
+ /* green */
+ case COLOUR3_PRIMARY:
+ *p = y&1 ? 'g' : x&1 ? '+' : 'g';
+ break;
+ case COLOUR3_LIGHT:
+ *p = (x^y)&1 ? '+' : 'g';
+ break;
+ case COLOUR3_DARK:
+ *p = 'g';
+ if (is_edge(x, y, w, h, p, COLOUR3_DARK))
+ *p = (x^y)&1 ? '#' : 'g';
+ break;
+ /* blue */
+ case COLOUR4_PRIMARY:
+ *p = (x^y)&1 ? 'b' : 'c';
+ break;
+ case COLOUR4_LIGHT:
+ *p = 'c';
+ if (is_edge(x, y, w, h, p, COLOUR4_LIGHT))
+ *p = (x^y)&1 ? 'b' : 'c';
+ break;
+ case COLOUR4_DARK:
+ *p = 'b';
+ if (is_edge(x, y, w, h, p, COLOUR4_DARK))
+ *p = (x^y)&1 ? '#' : 'b';
+ break;
+ /* white */
+ case COLOUR5_PRIMARY:
+ *p = (x^y)&1 ? '-' : ' ';
+ break;
+ case COLOUR5_LIGHT:
+ *p = ' ';
+ break;
+ case COLOUR5_DARK:
+ *p = (x^y)&1 ? '+' : ' ';
+ break;
+ /* dummy */
+ case 0xff0000: *p = 'R'; break;
+ case 0x00ff00: *p = 'G'; break;
+ case 0x0000ff: *p = 'B'; break;
+ }