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from libc.stdio cimport (

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        FILE,

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)

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cdef extern from "pngtile.h" :

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    struct pt_ctx :

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        pass

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    struct pt_image :

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        pass

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    enum pt_open_mode :

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        PT_OPEN_READ    # 0

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        PT_OPEN_UPDATE

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    enum pt_cache_status :

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        PT_CACHE_ERROR  # -1

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        PT_CACHE_FRESH

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        PT_CACHE_NONE

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        PT_CACHE_STALE

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        PT_CACHE_INCOMPAT

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    struct pt_image_info :

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        size_t img_width, img_height, img_bpp

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        int image_mtime, cache_mtime, cache_version

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        size_t image_bytes, cache_bytes

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        size_t cache_blocks

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    struct pt_image_params :

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        int background_color[4]

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    struct pt_tile_info :

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        size_t width, height

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        size_t x, y

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        int zoom

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    ctypedef pt_image_info* const_image_info_ptr "const struct pt_image_info *"

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    ## functions

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    int pt_image_open (pt_image **image_ptr, pt_ctx *ctx, char *png_path, int cache_mode) nogil

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    int pt_image_info_ "pt_image_info" (pt_image *image, pt_image_info **info_ptr) nogil

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    int pt_image_status (pt_image *image) nogil

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    int pt_image_load (pt_image *image) nogil

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    int pt_image_update (pt_image *image, pt_image_params *params) nogil

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    int pt_image_tile_file (pt_image *image, pt_tile_info *info, FILE *out) nogil

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    int pt_image_tile_mem (pt_image *image, pt_tile_info *info, char **buf_ptr, size_t *len_ptr) nogil

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    void pt_image_destroy (pt_image *image) nogil

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    # error code -> name

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    char* pt_strerror (int err)