diff options
Diffstat (limited to 'include/gba/io_reg.h')
| -rw-r--r-- | include/gba/io_reg.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/include/gba/io_reg.h b/include/gba/io_reg.h index d483d4ddc..6dbe5e8ed 100644 --- a/include/gba/io_reg.h +++ b/include/gba/io_reg.h @@ -539,7 +539,28 @@ #define BGCNT_AFF1024x1024 0xC000 // BLDCNT - +// Bits 0-5 select layers for the 1st target +#define BLDCNT_TGT1_BG0 (1 << 0) +#define BLDCNT_TGT1_BG1 (1 << 1) +#define BLDCNT_TGT1_BG2 (1 << 2) +#define BLDCNT_TGT1_BG3 (1 << 3) +#define BLDCNT_TGT1_OBJ (1 << 4) +#define BLDCNT_TGT1_BD (1 << 5) +// Bits 6-7 select the special effect +#define BLDCNT_EFFECT_NONE (0 << 6) // no special effect +#define BLDCNT_EFFECT_BLEND (1 << 6) // 1st+2nd targets mixed (controlled by BLDALPHA) +#define BLDCNT_EFFECT_LIGHTEN (2 << 6) // 1st target becomes whiter (controlled by BLDY) +#define BLDCNT_EFFECT_DARKEN (3 << 6) // 1st target becomes blacker (controlled by BLDY) +// Bits 8-13 select layers for the 2nd target +#define BLDCNT_TGT2_BG0 (1 << 8) +#define BLDCNT_TGT2_BG1 (1 << 9) +#define BLDCNT_TGT2_BG2 (1 << 10) +#define BLDCNT_TGT2_BG3 (1 << 11) +#define BLDCNT_TGT2_OBJ (1 << 12) +#define BLDCNT_TGT2_BD (1 << 13) + +// BLDALPHA +#define BLDALPHA_BLEND(target1, target2) (((target2) << 8) | (target1)) // SOUNDCNT_H #define SOUND_CGB_MIX_QUARTER 0x0000 |