1 #include "cache.h"

     2 

     3 static int pt_cache_new (struct pt_cache **cache_ptr)

     4 {

     5     struct pt_cache *cache;

     6 

     7     if ((cache = calloc(1, sizeof(*cache))) == NULL)

     8         return -1;

     9 

    10     // ok

    11     *cache_ptr = cache;

    12 

    13     return 0;

    14 }

    15 

    16 int pt_cache_open (struct pt_cache **cache_ptr, struct pt_image *img, int mode)

    17 {

    18     struct pt_cache *cache;

    19     

    20     // alloc

    21     if (pt_cache_new(&cache))

    22         return -1;

    23 

    24     

    25 }

    26 

    27 bool pt_cache_fresh (struct pt_cache *cache)

    28 {

    29     // TODO: stat + mtime

    30     return false;

    31 }

    32 

    33 /**

    34  * Create a new cache file, open it, and write out the header.

    35  */

    36 static int pt_cache_create (struct pt_cache *cache, struct pt_cache_header *header)

    37 {

    38     

    39 }

    40 

    41 int pt_cache_update_png (struct pt_cache *cache, png_structp png, png_infop info)

    42 {

    43     struct pt_cache_header header;

    44 

    45     memset(&header, 0, sizeof(header));

    46 

    47     // fill in basic info

    48     header->width = png_get_image_width(png, info);

    49     header->height = png_get_image_height(png, info);

    50     header->bit_depth = png_get_bit_depth(png, info);

    51     header->color_type = png_get_color_type(png, info);

    52 

    53     // fill in other info

    54     header->row_bytes = png_get_rowbytes(png, info);

    55 }