#ifndef GUARD_GBA_DEFINES
#define GUARD_GBA_DEFINES

#include <stddef.h>

#define TRUE  1
#define FALSE 0

#define IWRAM_DATA __attribute__((section("iwram_data")))
#define EWRAM_DATA __attribute__((section("ewram_data")))

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

// The original build process placed COMMON data (i.e. uninitialized globals)
// in IWRAM after the static variables.
// When ld places COMMON variables in the output, it aligns the variable
// according to the size of the variable, with a maximum alignment of 16. This
// results in large alignment values.
// Initialized variables are aligned according to the size of the largest
// primitive type in the object, so their alignment will often be smaller.
// However, we cannot use COMMON data in pokeruby because the order of COMMON
// data in the output is not reliable. Instead, we need to initialize the
// variables so that their order in the source file is preserved in the output.
// But using initialized variables brings us into conflict with those large
// alignment values.
// These macros allow us to get around this by manually specifying what the
// alignment would be if the variable were uninitialized.
#define COMM(decl, n) IWRAM_DATA ALIGNED(1 << n) decl = {0};
#define COMM_2(decl) COMM(decl, 2)
#define COMM_3(decl) COMM(decl, 3)
#define COMM_4(decl) COMM(decl, 4)

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

#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_ADDR(n)   (BG_VRAM + (0x4000 * (n)))
#define BG_SCREEN_ADDR(n) (BG_VRAM + (0x800 * (n)))

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

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

#define OAM      0x7000000
#define OAM_SIZE 0x400

#define DISPLAY_WIDTH  240
#define DISPLAY_HEIGHT 160

#define TILE_SIZE_4BPP 32
#define TILE_SIZE_8BPP 64

#define TOTAL_OBJ_TILE_COUNT 1024

#define RGB(r, g, b) ((r) | ((g) << 5) | ((b) << 10))

#define RGB_BLACK RGB(0, 0, 0)
#define RGB_WHITE RGB(31, 31, 31)

#endif // GUARD_GBA_DEFINES