texture mapping and shading LUTs

[metatoy] / src / colormgr.h

diff --git a/src/colormgr.h b/src/colormgr.h
index a3dd2bb..23bc08d 100644 (file)
--- a/src/colormgr.h
+++ b/src/colormgr.h
@@ -1,8 +1,19 @@
 #ifndef COLORMGR_H_
 #define COLORMGR_H_
 
+#define SHADE_LEVELS   8
+#define SHADE_SHIFT            3
+
+#define LOOKUP_SHADE(col, shade) \
+       shade_lut[(col << SHADE_SHIFT) + ((255 - (shade)) >> (8 - SHADE_SHIFT))]
+
+extern unsigned char *colormap;
+extern int *shade_lut;
+
 void init_colormgr(void);
 
+void load_colormap(int offs, int sz, unsigned char *col, unsigned char *slut);
+
 int find_color(int r, int g, int b);
 int shade_color(int col, int shade);   /* both 0-255 */