libs/tiff/tif_read.c

51 	tstrip_t strip;
65 		strip = sample*td->td_stripsperimage + row/td->td_rowsperstrip;
67 		strip = row / td->td_rowsperstrip;
68 	if (strip != tif->tif_curstrip) { 	/* different strip, refill */
69 		if (!TIFFFillStrip(tif, strip))
73 		 * Moving backwards within the same strip: backup
77 		 * strip, it's better to just read and decode the entire
78 		 * strip, and then access the decoded data in a random fashion.
80 		if (!TIFFStartStrip(tif, strip))
116  * Read a strip of data and decompress the specified
120 TIFFReadEncodedStrip(TIFF* tif, tstrip_t strip, tdata_t buf, tsize_t size)
129 	if (strip >= td->td_nstrips) {
131 		    (long) strip, (long) td->td_nstrips);
135 	 * Calculate the strip size according to the number of
136 	 * rows in the strip (check for truncated last strip on any
145         sep_strip = strip % strips_per_sep;
156 	if (TIFFFillStrip(tif, strip) && (*tif->tif_decodestrip)(tif,
157 	    (tidata_t) buf, size, (tsample_t)(strip / td->td_stripsperimage))) {
166     tstrip_t strip, tdata_t buf, tsize_t size, const char* module)
173 		if (!SeekOK(tif, td->td_stripoffset[strip])) {
175 			    "%s: Seek error at scanline %lu, strip %lu",
177 			    (tif_long) tif->tif_row, (tif_long) strip);
191 		if (td->td_stripoffset[strip] + size > tif->tif_size) {
193     "%s: Read error at scanline %lu, strip %lu; got %lu bytes, expected %lu",
196 			    (tif_long) strip,
197 			    (tif_long)tif->tif_size-td->td_stripoffset[strip],
201 		_TIFFmemcpy(buf, tif->tif_base+td->td_stripoffset[strip], size);
207  * Read a strip of data from the file.
210 TIFFReadRawStrip(TIFF* tif, tstrip_t strip, tdata_t buf, tsize_t size)
218 	if (strip >= td->td_nstrips) {
220 		    (tif_long) strip, (tif_long) td->td_nstrips);
223 	bytecount = td->td_stripbytecount[strip];
226 		    "%lu: Invalid strip byte count, strip %lu",
227 		    (tif_long) bytecount, (tif_long) strip);
232 	return (TIFFReadRawStrip1(tif, strip, buf, bytecount, module));
236  * Read the specified strip and setup for decoding.
238  * hold the strip's data.
241 TIFFFillStrip(TIFF* tif, tstrip_t strip)
247 	bytecount = td->td_stripbytecount[strip];
250 		    "%lu: Invalid strip byte count, strip %lu",
251 		    (tif_long) bytecount, (tif_long) strip);
271 		if ( td->td_stripoffset[strip] + bytecount > tif->tif_size) {
277 		    "%s: Read error on strip %lu; got %lu bytes, expected %lu",
279 			    (tif_long) strip,
280 			    (tif_long)tif->tif_size-td->td_stripoffset[strip],
286 		tif->tif_rawdata = tif->tif_base + td->td_stripoffset[strip];
290 		 * hold data strip coming from file
298 				"%s: Data buffer too small to hold strip %lu",
299 				    tif->tif_name, (tif_long) strip);
306 		if (TIFFReadRawStrip1(tif, strip, (tif_char *)tif->tif_rawdata,
313 	return (TIFFStartStrip(tif, strip));
506  * reading a strip of raw data.  If the buffer
510  * large enough to hold any individual strip of
545  * strip has just been read in.
548 TIFFStartStrip(TIFF* tif, tstrip_t strip)
557 	tif->tif_curstrip = strip;
558 	tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip;
560 	tif->tif_rawcc = td->td_stripbytecount[strip];
562 			(tsample_t)(strip / td->td_stripsperimage)));