added texture mapping

[dosdemo] / src / gfxutil.h

diff --git a/src/gfxutil.h b/src/gfxutil.h
index f811987..07883ef 100644 (file)
--- a/src/gfxutil.h
+++ b/src/gfxutil.h
@@ -4,6 +4,10 @@
 #define PACK_RGB16(r, g, b) \
        (((((r) >> 3) & 0x1f) << 11) | ((((g) >> 2) & 0x3f) << 5) | (((b) >> 3) & 0x1f))
 
+#define UNPACK_R16(c)  (((c) >> 8) & 0x7c)
+#define UNPACK_G16(c)  (((c) >> 3) & 0xfc)
+#define UNPACK_B16(c)  (((c) << 3) & 0x7c)
+
 #define PACK_RGB32(r, g, b) \
        ((((r) & 0xff) << 16) | (((g) & 0xff) << 8) | ((b) & 0xff))