static int check_file(struct img_io *io);
static int read_file(struct img_pixmap *img, struct img_io *io);
static int check_file(struct img_io *io);
static int read_file(struct img_pixmap *img, struct img_io *io);
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
png_set_text(png, info, &txt, 1);
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
png_set_text(png, info, &txt, 1);
png_write_end(png, info);
png_destroy_write_struct(&png, &info);
png_write_end(png, info);
png_destroy_write_struct(&png, &info);