int rpng_nbio_load_image_argb_process(struct rpng_t *rpng,
uint32_t **data, unsigned *width, unsigned *height)
{
if (!rpng->process.initialized)
{
if (!rpng_load_image_argb_process_init(rpng, data, width,
height))
return PNG_PROCESS_ERROR;
return 0;
}
if (!rpng->process.inflate_initialized)
{
int ret = rpng_load_image_argb_process_inflate_init(rpng, data,
width, height);
if (ret == -1)
return PNG_PROCESS_ERROR;
return 0;
}
return png_reverse_filter_iterate(rpng, data);
}
bool rpng_load_image_argb(const char *path, uint32_t **data,
unsigned *width, unsigned *height)
{
long pos, file_len;
FILE *file;
char header[8] = {0};
rpng_t rpng = {{0}};
bool ret = true;
int retval = 0;
*data = NULL;
*width = 0;
*height = 0;
file = fopen(path, "rb");
if (!file)
return false;
fseek(file, 0, SEEK_END);
file_len = ftell(file);
rewind(file);
if (fread(header, 1, sizeof(header), file) != sizeof(header))
GOTO_END_ERROR();
if (memcmp(header, png_magic, sizeof(png_magic)) != 0)
GOTO_END_ERROR();
/* feof() apparently isn't triggered after a seek (IEND). */
for (pos = ftell(file);
pos < file_len && pos >= 0; pos = ftell(file))
{
if (!rpng_load_image_argb_iterate(&file, &rpng))
GOTO_END_ERROR();
}
if (!rpng.has_ihdr || !rpng.has_idat || !rpng.has_iend)
GOTO_END_ERROR();
if (!rpng_load_image_argb_process_init(&rpng, data, width,
height))
GOTO_END_ERROR();
do{
retval = rpng_load_image_argb_process_inflate_init(&rpng, data,
width, height);
}while(retval == 0);
if (retval == -1)
GOTO_END_ERROR();
do{
retval = png_reverse_filter_iterate(&rpng, data);
}while(retval == PNG_PROCESS_NEXT);
if (retval == PNG_PROCESS_ERROR || retval == PNG_PROCESS_ERROR_END)
GOTO_END_ERROR();
end:
if (file)
fclose(file);
if (!ret)
free(*data);
free(rpng.idat_buf.data);
free(rpng.process.inflate_buf);
if (rpng.process.stream)
{
zlib_stream_free(rpng.process.stream);
free(rpng.process.stream);
}
return ret;
}
