int rpng_load_image_argb_process_inflate_init(struct rpng_t *rpng,
uint32_t **data, unsigned *width, unsigned *height)
{
int zstatus;
bool to_continue = (zlib_stream_get_avail_in(rpng->process.stream) > 0
&& zlib_stream_get_avail_out(rpng->process.stream) > 0);
if (!to_continue)
goto end;
zstatus = zlib_inflate_data_to_file_iterate(rpng->process.stream);
switch (zstatus)
{
case 1:
goto end;
case -1:
goto error;
default:
break;
}
return 0;
end:
zlib_stream_free(rpng->process.stream);
*width = rpng->ihdr.width;
*height = rpng->ihdr.height;
#ifdef GEKKO
/* we often use these in textures, make sure they're 32-byte aligned */
*data = (uint32_t*)memalign(32, rpng->ihdr.width *
rpng->ihdr.height * sizeof(uint32_t));
#else
*data = (uint32_t*)malloc(rpng->ihdr.width *
rpng->ihdr.height * sizeof(uint32_t));
#endif
if (!*data)
goto false_end;
rpng->process.adam7_restore_buf_size = 0;
rpng->process.restore_buf_size = 0;
rpng->process.palette = rpng->palette;
if (rpng->ihdr.interlace != 1)
if (png_reverse_filter_init(&rpng->ihdr, &rpng->process) == -1)
goto false_end;
rpng->process.inflate_initialized = true;
return 1;
error:
zlib_stream_free(rpng->process.stream);
false_end:
rpng->process.inflate_initialized = false;
return -1;
}
/**
* zlib_inflate_data_to_file:
* @path : filename path of archive.
* @valid_exts : Valid extensions of archive to be parsed.
* If NULL, allow all.
* @cdata : input data.
* @csize : size of input data.
* @size : output file size
* @checksum : CRC32 checksum from input data.
*
* Decompress data to file.
*
* Returns: true (1) on success, otherwise false (0).
**/
int zlib_inflate_data_to_file(zlib_file_handle_t *handle,
int ret, const char *path, const char *valid_exts,
const uint8_t *cdata, uint32_t csize, uint32_t size, uint32_t checksum)
{
if (handle)
{
zlib_stream_free(handle->stream);
free(handle->stream);
}
if (!handle || ret == -1)
{
ret = 0;
goto end;
}
handle->real_checksum = zlib_crc32_calculate(handle->data, size);
#if 0
if (handle->real_checksum != checksum)
{
/* File CRC difers from ZIP CRC. */
printf("File CRC differs from ZIP CRC. File: 0x%x, ZIP: 0x%x.\n",
(unsigned)handle->real_checksum, (unsigned)checksum);
}
#endif
if (!zlib_write_file(path, handle->data, size))
GOTO_END_ERROR();
end:
if (handle->data)
free(handle->data);
return ret;
}
bool zlib_inflate_data_to_file_init(
zlib_file_handle_t *handle,
const uint8_t *cdata, uint32_t csize, uint32_t size)
{
z_stream *stream = NULL;
if (!handle)
return false;
if (!(handle->stream = (z_stream*)zlib_stream_new()))
goto error;
if (!(zlib_inflate_init2(handle->stream)))
goto error;
handle->data = (uint8_t*)malloc(size);
if (!handle->data)
goto error;
stream = (z_stream*)handle->stream;
if (!stream)
goto error;
zlib_set_stream(stream,
csize,
size,
(const uint8_t*)cdata,
handle->data
);
return true;
error:
if (handle->stream)
zlib_stream_free(handle->stream);
if (handle->data)
free(handle->data);
return false;
}
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;
}
