/* Free all memory used by the read */
void PNGAPI
png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
png_infopp end_info_ptr_ptr)
{
png_structp png_ptr = NULL;
png_infop info_ptr = NULL, end_info_ptr = NULL;
#ifdef PNG_USER_MEM_SUPPORTED
png_free_ptr free_fn = NULL;
png_voidp mem_ptr = NULL;
#endif
png_debug(1, "in png_destroy_read_struct");
if (png_ptr_ptr != NULL)
png_ptr = *png_ptr_ptr;
if (png_ptr == NULL)
return;
#ifdef PNG_USER_MEM_SUPPORTED
free_fn = png_ptr->free_fn;
mem_ptr = png_ptr->mem_ptr;
#endif
if (info_ptr_ptr != NULL)
info_ptr = *info_ptr_ptr;
if (end_info_ptr_ptr != NULL)
end_info_ptr = *end_info_ptr_ptr;
png_read_destroy(png_ptr, info_ptr, end_info_ptr);
if (info_ptr != NULL)
{
#ifdef PNG_TEXT_SUPPORTED
png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1);
#endif
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
(png_voidp)mem_ptr);
#else
png_destroy_struct((png_voidp)info_ptr);
#endif
*info_ptr_ptr = NULL;
}
if (end_info_ptr != NULL)
{
#ifdef PNG_READ_TEXT_SUPPORTED
png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1);
#endif
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn,
(png_voidp)mem_ptr);
#else
png_destroy_struct((png_voidp)end_info_ptr);
#endif
*end_info_ptr_ptr = NULL;
}
if (png_ptr != NULL)
{
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
(png_voidp)mem_ptr);
#else
png_destroy_struct((png_voidp)png_ptr);
#endif
*png_ptr_ptr = NULL;
}
}
/* free all memory used by the read */
void
png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
png_infopp end_info_ptr_ptr)
{
png_structp png_ptr = NULL;
png_infop info_ptr = NULL, end_info_ptr = NULL;
#ifdef PNG_USER_MEM_SUPPORTED
png_free_ptr free_fn = NULL;
#endif /* PNG_USER_MEM_SUPPORTED */
png_debug(1, "in png_destroy_read_struct\n");
/* save jump buffer and error functions */
if (png_ptr_ptr != NULL)
png_ptr = *png_ptr_ptr;
if (info_ptr_ptr != NULL)
info_ptr = *info_ptr_ptr;
if (end_info_ptr_ptr != NULL)
end_info_ptr = *end_info_ptr_ptr;
#ifdef PNG_USER_MEM_SUPPORTED
free_fn = png_ptr->free_fn;
#endif
png_read_destroy(png_ptr, info_ptr, end_info_ptr);
if (info_ptr != NULL)
{
#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED)
png_free(png_ptr, info_ptr->text);
#endif
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)info_ptr, free_fn);
#else
png_destroy_struct((png_voidp)info_ptr);
#endif
*info_ptr_ptr = (png_infop)NULL;
}
if (end_info_ptr != NULL)
{
#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED)
png_free(png_ptr, end_info_ptr->text);
#endif
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)end_info_ptr, free_fn);
#else
png_destroy_struct((png_voidp)end_info_ptr);
#endif
*end_info_ptr_ptr = (png_infop)NULL;
}
if (png_ptr != NULL)
{
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)png_ptr, free_fn);
#else
png_destroy_struct((png_voidp)png_ptr);
#endif
*png_ptr_ptr = (png_structp)NULL;
}
}
int main(int argc, char **argv)
{
FILE *fin = NULL;
FILE *fout = NULL;
char header[8];
uint8_t *image_data = NULL;
png_bytep *row_pointers = NULL;
int i;
if (argc < 3) ERR("too few arguments")
if ((fin = fopen(argv[1], "rb")) == NULL) ERR("cannot open man, lame!");
printf("%s opened\n", argv[1]);
fread(header, 1, 8, fin);
if (png_check_sig(header, 8) == 0) ERR("not a valid .png image")
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr) ERR("sdf");
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr) {
png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
ERR2("fssdfs");
}
if (setjmp(png_ptr->jmpbuf)) {
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return 0;
}
png_init_io(png_ptr, fin);
png_set_sig_bytes(png_ptr, 8);
png_read_info(png_ptr, info_ptr);
printf("width : %d\n", info_ptr->width);
printf("height : %d\n", info_ptr->height);
printf("bpp : %d\n", info_ptr->bit_depth);
printf("palette : %d entries\n", info_ptr->num_palette);
printf("rowbytes : %d\n", info_ptr->rowbytes);
/* fclose(fin);
return 0;
png_infop end_info = png_create_info_struct(png_ptr);
if (!end_info) {
png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
ERR2("fjsh");
}
*/
// optional call to update palette with transformations
// png_start_read_image(png_ptr);
// optional call to update the info structure
// png_read_update_info(png_ptr, info_ptr);
if ((image_data = (uint8_t*)malloc(info_ptr->rowbytes*info_ptr->height)) == NULL) {
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return 0;
}
row_pointers = (png_bytep*)malloc(sizeof(png_bytep)*info_ptr->height);
for (i=0; i<info_ptr->height; ++i) row_pointers[i] = image_data + i*info_ptr->rowbytes;
// the easiest way to read the image
png_read_image(png_ptr, row_pointers);
// void write_binimg(char *fname, uint8_t *data, png_color *pal_data, int pal_size, int width, int height, int bpp)
char filename[256];
strcpy(filename, argv[2]);
/* write_binimg(strcat(filename, ".raw"), image_data, info_ptr->palette, info_ptr->num_palette,
info_ptr->width, info_ptr->height, info_ptr->bit_depth);
*/
write_2c(argv[2], image_data, info_ptr->palette, info_ptr->num_palette,
info_ptr->width, info_ptr->height, info_ptr->bit_depth);
// clean up after the read, and free any memory allocated
png_read_destroy(png_ptr, info_ptr, (png_infop)0);
// png_read_end(png_ptr, NULL);
i_am_done:
if (image_data != NULL) free(image_data);
if (row_pointers != NULL) free(row_pointers);
if (fin != NULL) fclose(fin);
if (fout != NULL) fclose(fout);
return 0;
}
/* free all memory used by the read */
void PNGAPI
png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
png_infopp end_info_ptr_ptr)
{
png_structp png_ptr = NULL;
png_infop info_ptr = NULL, end_info_ptr = NULL;
#ifdef PNG_USER_MEM_SUPPORTED
png_free_ptr free_fn = NULL;
png_voidp mem_ptr = NULL;
#endif
png_debug(1, "in png_destroy_read_struct\n");
/* save jump buffer and error functions */
if (png_ptr_ptr != NULL)
png_ptr = *png_ptr_ptr;
if (info_ptr_ptr != NULL)
info_ptr = *info_ptr_ptr;
if (end_info_ptr_ptr != NULL)
end_info_ptr = *end_info_ptr_ptr;
#ifdef PNG_USER_MEM_SUPPORTED
free_fn = png_ptr->free_fn;
mem_ptr = png_ptr->mem_ptr;
#endif
png_read_destroy(png_ptr, info_ptr, end_info_ptr);
if (info_ptr != NULL)
{
#if defined(PNG_TEXT_SUPPORTED)
png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1);
#endif
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
(png_voidp)mem_ptr);
#else
png_destroy_struct((png_voidp)info_ptr);
#endif
*info_ptr_ptr = (png_infop)NULL;
}
if (end_info_ptr != NULL)
{
#if defined(PNG_READ_TEXT_SUPPORTED)
png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1);
#endif
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn,
(png_voidp)mem_ptr);
#else
png_destroy_struct((png_voidp)end_info_ptr);
#endif
*end_info_ptr_ptr = (png_infop)NULL;
}
if (png_ptr != NULL)
{
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
(png_voidp)mem_ptr);
#else
png_destroy_struct((png_voidp)png_ptr);
#endif
*png_ptr_ptr = (png_structp)NULL;
}
}
