3dgfx code, untested

[metatoy] / src / gfxutil.h

diff --git a/src/gfxutil.h b/src/gfxutil.h
new file mode 100644 (file)
index 0000000..563e10b
--- /dev/null
+++ b/src/gfxutil.h
@@ -0,0 +1,17 @@
+#ifndef GFXUTIL_H_
+#define GFXUTIL_H_
+
+#define PACK_RGB32(r, g, b) \
+       ((((r) & 0xff) << 16) | (((g) & 0xff) << 8) | ((b) & 0xff) | 0xff000000)
+
+#define UNPACK_R32(c)  (((c) >> 16) & 0xff)
+#define UNPACK_G32(c)  (((c) >> 8) & 0xff)
+#define UNPACK_B32(c)  ((c) & 0xff)
+
+
+int clip_line(int *x0, int *y0, int *x1, int *y1, int xmin, int ymin, int xmax, int ymax);
+void draw_line(int x0, int y0, int x1, int y1, unsigned char color);
+
+void draw_billboard(float x, float y, float z, float size, int lum, int a);
+
+#endif /* GFXUTIL_H_ */