/**
* Initialize the cinfo struct.
* Calls jpeg_create_decompress, makes customizations, and
* finally calls jpeg_read_header. Returns true if jpeg_read_header
* returns JPEG_HEADER_OK.
* If cinfo was already initialized, destroyInfo must be called to
* destroy the old one. Must not be called after startTileDecompress.
*/
bool initializeInfoAndReadHeader() {
SkASSERT(!fInfoInitialized && !fDecompressStarted);
initialize_info(&fCInfo, &fSrcMgr);
fInfoInitialized = true;
const bool success = (JPEG_HEADER_OK == jpeg_read_header(&fCInfo, true));
SkDEBUGCODE(fReadHeaderSucceeded = success;)
return success;
/*------------------------------------------------------------------------
* _ChunkArray ---
* converts an input array to chunked format using the information
* provided by the access pattern.
* Results:
* creates a new file that stores the chunked array and returns
* information about the chunked file
*-----------------------------------------------------------------------
*/
char *
_ChunkArray(int fd,
FILE *afd,
int ndim,
int dim[],
int baseSize,
int *nbytes,
char *chunkfile)
{
int cfd;
int chunk[MAXDIM], csize;
bool reorgFlag;
if (chunkfile == NULL)
reorgFlag = true;
else
reorgFlag = false;
#ifdef LOARRAY
if (reorgFlag)
/* create new LO for chunked file */
chunkfile = _array_newLO( &cfd, fileFlag );
else
cfd = LOopen(chunkfile, O_RDONLY);
#endif
if (cfd < 0)
elog(WARN, "Enable to open chunk file");
strcpy (cInfo.lo_name, chunkfile);
/* find chunk size */
csize = GetChunkSize(afd, ndim, dim, baseSize, chunk);
if (reorgFlag)
/* copy data from input file to chunked file */
_ConvertToChunkFile(ndim, baseSize, dim, chunk, fd, cfd);
initialize_info(&cInfo, ndim, dim, chunk);
*nbytes = sizeof(CHUNK_INFO);
return (char *) &cInfo ;
}
