#ifndef GUARD_GBA_DEFINES
#define GUARD_GBA_DEFINES

#include <stddef.h>

#define TRUE  1
#define FALSE 0

#if defined(__APPLE__)
#define IWRAM_DATA __attribute__((section("__DATA,iwram_data")))
#define EWRAM_DATA __attribute__((section("__DATA,ewram_data")))
#else
#define IWRAM_DATA __attribute__((section("iwram_data")))
#define EWRAM_DATA __attribute__((section("ewram_data")))
#endif

#define NAKED __attribute__((naked))
#define UNUSED __attribute__((unused))

#define ALIGNED(n) __attribute__((aligned(n)))

#define SOUND_INFO_PTR (*(struct SoundInfo **)0x3007FF0)
#define INTR_CHECK     (*(u16 *)0x3007FF8)
#define INTR_VECTOR    (*(void **)0x3007FFC)

#define EWRAM_START 0x02000000
#define EWRAM_END   (EWRAM_START + 0x40000)
#define IWRAM_START 0x03000000
#define IWRAM_END   (IWRAM_START + 0x8000)

#define PLTT      0x5000000
#define PLTT_SIZE 0x400

#define BG_PLTT      PLTT
#define BG_PLTT_SIZE 0x200

#define OBJ_PLTT      (PLTT + 0x200)
#define OBJ_PLTT_SIZE 0x200

#define VRAM      0x6000000
#define VRAM_SIZE 0x18000

#define BG_VRAM           VRAM
#define BG_VRAM_SIZE      0x10000
#define BG_CHAR_SIZE      0x4000
#define BG_SCREEN_SIZE    0x800
#define BG_CHAR_ADDR(n)   (void *)(BG_VRAM + (BG_CHAR_SIZE * (n)))
#define BG_SCREEN_ADDR(n) (void *)(BG_VRAM + (BG_SCREEN_SIZE * (n)))
#define BG_TILE_ADDR(n)   (void *)(BG_VRAM + (0x80 * (n)))

#define BG_TILE_H_FLIP(n) (0x400 + (n))
#define BG_TILE_V_FLIP(n) (0x800 + (n))

// text-mode BG
#define OBJ_VRAM0      (void *)(VRAM + 0x10000)
#define OBJ_VRAM0_SIZE 0x8000

// bitmap-mode BG
#define OBJ_VRAM1      (void *)(VRAM + 0x14000)
#define OBJ_VRAM1_SIZE 0x4000

#define OAM      0x7000000
#define OAM_SIZE 0x400

#define ROM_HEADER_SIZE   0xC0

#define DISPLAY_WIDTH  240
#define DISPLAY_HEIGHT 160

#define TILE_SIZE_4BPP 32
#define TILE_SIZE_8BPP 64

#define TILE_OFFSET_4BPP(n) ((n) * TILE_SIZE_4BPP)
#define TILE_OFFSET_8BPP(n) ((n) * TILE_SIZE_8BPP)

#define TOTAL_OBJ_TILE_COUNT 1024

#define RGB(r, g, b) ((r) | ((g) << 5) | ((b) << 10))
#define RGB2(r, g, b) (((b) << 10) | ((g) << 5) | (r))
#define _RGB(r, g, b) ((((b) & 0x1F) << 10) + (((g) & 0x1F) << 5) + ((r) & 0x1F))

#define RGB_BLACK RGB(0, 0, 0)
#define RGB_WHITE RGB(31, 31, 31)
#define RGB_RED RGB(31, 0, 0)
#define RGB_GREEN RGB(0, 31, 0)
#define RGB_BLUE RGB(0, 0, 31)
#define RGB_YELLOW RGB(31, 31, 0)
#define RGB_MAGENTA RGB(31, 0, 31)
#define RGB_CYAN RGB(0, 31, 31)
#define RGB_WHITEALPHA (RGB_WHITE | 0x8000)

#define SYSTEM_CLOCK           (16 * 1024 * 1024)   // System Clock

#endif // GUARD_GBA_DEFINES
