3dgfx code, untested

[metatoy] / src / colormgr.c

diff --git a/src/colormgr.c b/src/colormgr.c
new file mode 100644 (file)
index 0000000..8ab61c9
--- /dev/null
+++ b/src/colormgr.c
@@ -0,0 +1,31 @@
+#include "colormgr.h"
+#include "vga.h"
+
+/* TODO bring in a proper color manager with shade LUTs later */
+
+void init_colormgr(void)
+{
+       unsigned int i, r, g, b;
+
+       for(i=0; i<256; i++) {
+               r = i & 0xe0;
+               g = (i << 3) & 0xe0;
+               b = (i << 5) & 0xc0;
+
+               r |= r >> 3;
+               g |= g >> 3;
+               b |= (b >> 2) | (b >> 4);
+
+               vga_setpalent(i, r, g, b);
+       }
+}
+
+int find_color(int r, int g, int b)
+{
+       return (r & 0xe0) | ((g >> 3) & 0x1c) | ((b >> 6) & 3);
+}
+
+int shade_color(int col, int shade)
+{
+       return col;     /* TODO */
+}