asset.h

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#ifndef SNES_ASSET_H
#define SNES_ASSET_H
 
#include <snes/types.h>
#include <snes/background.h>
#include <snes/dma.h>

typedef struct {
    const u8 *tiles;
    const u8 *tiles_end;
    const u8 *palette;
    const u8 *palette_end;
    u16 color_mode;
} GfxAsset;

typedef struct {
    GfxAsset gfx;
    const u8 *tilemap;
    const u8 *tilemap_end;
    u8 map_size;
} BgAsset;

void gfxLoad(u8 bg, const GfxAsset *asset, u8 palette_slot, u16 tiles_vram);

void bgLoad(u8 bg, const BgAsset *asset, u8 palette_slot,
            u16 tiles_vram, u16 map_vram);

#define DECLARE_GFX_ASSET(name, color_mode_)                                  \
    extern const u8 name##_tiles[], name##_tiles_end[];                             \
    extern const u8 name##_pal[],   name##_pal_end[];                               \
    static const GfxAsset name = {                                            \
        .tiles       = name##_tiles,                                          \
        .tiles_end   = name##_tiles_end,                                      \
        .palette     = name##_pal,                                            \
        .palette_end = name##_pal_end,                                        \
        .color_mode  = (color_mode_),                                         \
    }

#define DECLARE_BG_ASSET(name, color_mode_, map_size_)                        \
    extern const u8 name##_tiles[], name##_tiles_end[];                             \
    extern const u8 name##_pal[],   name##_pal_end[];                               \
    extern const u8 name##_map[],   name##_map_end[];                               \
    static const BgAsset name = {                                             \
        .gfx = {                                                              \
            .tiles       = name##_tiles,                                      \
            .tiles_end   = name##_tiles_end,                                  \
            .palette     = name##_pal,                                        \
            .palette_end = name##_pal_end,                                    \
            .color_mode  = (color_mode_),                                     \
        },                                                                    \
        .tilemap     = name##_map,                                            \
        .tilemap_end = name##_map_end,                                        \
        .map_size    = (map_size_),                                           \
    }
 
#endif /* SNES_ASSET_H */