sprites 256c, shadow oam, sprite transforms, sinlut

[gbajam21] / src / sprite.h

diff --git a/src/sprite.h b/src/sprite.h
new file mode 100644 (file)
index 0000000..27d16ff
--- /dev/null
+++ b/src/sprite.h
@@ -0,0 +1,51 @@
+#ifndef SPRITE_H_
+#define SPRITE_H_
+
+#include <stdint.h>
+
+enum {
+       SPR_ROTSCL      = 0x0100,
+       SPR_DBLSZ       = 0x0200,
+       SPR_BLEND       = 0x0400,
+       SPR_OBJWIN      = 0x0800,
+       SPR_MOSAIC      = 0x1000,
+       SPR_256COL      = 0x2000,
+       SPR_HRECT       = 0x4000,
+       SPR_VRECT       = 0x8000,
+
+       SPR_HFLIP       = 0x100000,
+       SPR_VFLIP       = 0x200000,
+       SPR_SZ16        = 0x400000,
+       SPR_SZ32        = 0x800000,
+       SPR_SZ64        = 0xc00000
+};
+#define SPR_SZ8                0
+#define SPR_ROTSCL_SEL(x)      ((unsigned int)(x) << 17)
+#define SPR_PRIO(x)                    ((unsigned int)(x) & 3)
+
+
+struct hwsprite {
+       short id;
+       short width, height;
+       short x, y;
+       unsigned int flags;
+};
+
+struct sprite {
+       short x, y;
+       struct hwsprite hwspr[8];
+       short num_hwspr;
+};
+
+void spr_setup(int xtiles, int ytiles, unsigned char *pixels, unsigned char *cmap);
+void spr_clear(void);
+
+#define spr_oam_clear(oam, idx) spr_oam(oam, idx, 0, 0, 160, 0)
+void spr_oam(uint16_t *oam, int idx, int spr, int x, int y, unsigned int flags);
+void spr_spr_oam(uint16_t *oam, int idx, struct sprite *spr);
+
+/* idx is the rotation/scale parameter index (0-31), not the sprite index */
+void spr_transform(uint16_t *oam, int idx, int16_t *mat);
+
+
+#endif /* SPRITE_H_ */