static int cb_nbio_image_menu_thumbnail(void *data, size_t len)
{
nbio_handle_t *nbio = (nbio_handle_t*)data;
if (!nbio || !data)
return -1;
nbio->image.handle = rpng_alloc();
nbio->image.cb = &cb_image_menu_thumbnail;
return cb_nbio_generic(nbio, &len);
}
static bool rpng_load_image_argb(const char *path, uint32_t **data,
unsigned *width, unsigned *height)
{
int retval;
size_t file_len;
bool ret = true;
rpng_t *rpng = NULL;
void *ptr = NULL;
struct nbio_t* handle = (struct nbio_t*)nbio_open(path, NBIO_READ);
if (!handle)
goto end;
nbio_begin_read(handle);
while (!nbio_iterate(handle));
ptr = nbio_get_ptr(handle, &file_len);
if (!ptr)
{
ret = false;
goto end;
}
rpng = rpng_alloc();
if (!rpng)
{
ret = false;
goto end;
}
if (!rpng_set_buf_ptr(rpng, (uint8_t*)ptr))
{
ret = false;
goto end;
}
if (!rpng_start(rpng))
{
ret = false;
goto end;
}
while (rpng_iterate_image(rpng));
if (!rpng_is_valid(rpng))
{
ret = false;
goto end;
}
do
{
retval = rpng_process_image(rpng,
(void**)data, file_len, width, height);
}while(retval == IMAGE_PROCESS_NEXT);
if (retval == IMAGE_PROCESS_ERROR || retval == IMAGE_PROCESS_ERROR_END)
ret = false;
end:
if (handle)
nbio_free(handle);
if (rpng)
rpng_free(rpng);
rpng = NULL;
if (!ret)
free(*data);
return ret;
}
