lg_astc_loader.h

/*
 *      LibGame - Copyright (C) Emmanuel Thomas-Maurin 2011-2025
 *      All rights reserved
 */
 
#ifndef LG_ASTC_LOADER_H
#define LG_ASTC_LOADER_H
 
typedef struct __attribute__((packed)) {
        uint8_t         magic[4];
        uint8_t         block_x;
        uint8_t         block_y;
        uint8_t         block_z;        /* 1 for 2D images */
        uint8_t         dim_x[3];       /* (24-bit unsigned value) decoded_dim = dim[0] + (dim[1] << 8) + (dim[2] << 16) */
        uint8_t         dim_y[3];
        uint8_t         dim_z[3];       /* 1 for 2D images */
} ASTC_Header;
 
typedef struct __attribute__((packed)) {
        char            sig[4];         /* "PKM " */
        char            version[2];     /* "10" or "20" */
        uint16_t        data_type;      /* 0 = ETC1_RGB_NO_MIPMAPS */
        uint16_t        width;          /* uint16_t big-endian */
        uint16_t        height;
        uint16_t        orig_width;
        uint16_t        orig_height;
} PKM_Header;
 
void    *lg_load_astc(const char *, lg_tc_format *, size_t *, int *, int *, int *);
 
void    *lg_load_etc1(const char *, lg_tc_format *, size_t *, int *, int *, int *);
 
#endif /* LG_ASTC_LOADER_H */