static bool rpng_nbio_load_image_argb_nonblocking(const char *path, uint32_t **data,
unsigned *width, unsigned *height)
{
size_t file_len;
bool ret = true;
struct rpng_t *rpng = NULL;
void *ptr = NULL;
struct nbio_t* handle = (void*)nbio_open(path, NBIO_READ);
if (!handle)
goto end;
ptr = nbio_get_ptr(handle, &file_len);
nbio_begin_read(handle);
while (!nbio_iterate(handle));
ptr = nbio_get_ptr(handle, &file_len);
if (!ptr)
{
ret = false;
goto end;
}
rpng = (struct rpng_t*)calloc(1, sizeof(struct rpng_t));
if (!rpng)
{
ret = false;
goto end;
}
rpng->buff_data = (uint8_t*)ptr;
if (!rpng->buff_data)
{
ret = false;
goto end;
}
if (!rpng_nbio_load_image_argb_start(rpng))
{
ret = false;
goto end;
}
while (rpng_nbio_load_image_argb_iterate(
rpng->buff_data, rpng))
{
rpng->buff_data += 4 + 4 + rpng->chunk.size + 4;
}
#if 0
fprintf(stderr, "has_ihdr: %d\n", rpng->has_ihdr);
fprintf(stderr, "has_idat: %d\n", rpng->has_idat);
fprintf(stderr, "has_iend: %d\n", rpng->has_iend);
#endif
if (!rpng->has_ihdr || !rpng->has_idat || !rpng->has_iend)
{
ret = false;
goto end;
}
rpng_nbio_load_image_argb_process(rpng, data, width, height);
end:
if (handle)
nbio_free(handle);
if (rpng)
rpng_nbio_load_image_free(rpng);
rpng = NULL;
if (!ret)
free(*data);
return ret;
}
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;
}
