libs/tiff/tif_read.c

50 	tstrip_t strip;
66 		strip = sample*td->td_stripsperimage + row/td->td_rowsperstrip;
68 		strip = row / td->td_rowsperstrip;
69 	if (strip != tif->tif_curstrip) {	/* different strip, refill */
70 		if (!TIFFFillStrip(tif, strip))
74 		 * Moving backwards within the same strip: backup
78 		 * strip, it's better to just read and decode the entire
79 		 * strip, and then access the decoded data in a random fashion.
81 		if (!TIFFStartStrip(tif, strip))
120  * Read a strip of data and decompress the specified
124 TIFFReadEncodedStrip(TIFF* tif, tstrip_t strip, tdata_t buf, tsize_t size)
133 	if (strip >= td->td_nstrips) {
136 			     (long) strip, (long) td->td_nstrips);
140 	 * Calculate the strip size according to the number of
141 	 * rows in the strip (check for truncated last strip on any
150 	sep_strip = strip % strips_per_sep;
161 	if (TIFFFillStrip(tif, strip)
163 	    (tsample_t)(strip / td->td_stripsperimage)) > 0 ) {
172     tstrip_t strip, tdata_t buf, tsize_t size, const char* module)
180 		if (!SeekOK(tif, td->td_stripoffset[strip])) {
182 			    "%s: Seek error at scanline %lu, strip %lu",
184 			    (unsigned long) tif->tif_row, (unsigned long) strip);
198 		if (td->td_stripoffset[strip] + size > tif->tif_size) {
200     "%s: Read error at scanline %lu, strip %lu; got %lu bytes, expected %lu",
203 			    (unsigned long) strip,
204 			    (unsigned long) tif->tif_size - td->td_stripoffset[strip],
208 		_TIFFmemcpy(buf, tif->tif_base + td->td_stripoffset[strip],
215  * Read a strip of data from the file.
218 TIFFReadRawStrip(TIFF* tif, tstrip_t strip, tdata_t buf, tsize_t size)
232 	if (strip >= td->td_nstrips) {
235 			     (unsigned long) strip,
245 	bytecount = td->td_stripbytecount[strip];
248 		    "%lu: Invalid strip byte count, strip %lu",
249 		    (unsigned long) bytecount, (unsigned long) strip);
254 	return (TIFFReadRawStrip1(tif, strip, buf, bytecount, module));
258  * Read the specified strip and setup for decoding. The data buffer is
259  * expanded, as necessary, to hold the strip's data.
262 TIFFFillStrip(TIFF* tif, tstrip_t strip)
275 		uint32 bytecount = td->td_stripbytecount[strip];
278 			    "%s: Invalid strip byte count %lu, strip %lu",
280 			    (unsigned long) strip);
304 			 *  td->td_stripoffset[strip]+bytecount > tif->tif_size
310 			    td->td_stripoffset[strip] > tif->tif_size - bytecount) {
318 					"%s: Read error on strip %lu; "
320 					tif->tif_name, (unsigned long) strip,
321 					(unsigned long) tif->tif_size - td->td_stripoffset[strip],
327 			tif->tif_rawdata = tif->tif_base + td->td_stripoffset[strip];
331 			 * strip coming from file (perhaps should set upper
339 				"%s: Data buffer too small to hold strip %lu",
341 						     (unsigned long) strip);
348 			if ((uint32)TIFFReadRawStrip1(tif, strip,
357 	return (TIFFStartStrip(tif, strip));
585  * reading a strip of raw data.  If the buffer
589  * large enough to hold any individual strip of
626  * strip has just been read in.
629 TIFFStartStrip(TIFF* tif, tstrip_t strip)
638 	tif->tif_curstrip = strip;
639 	tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip;
648 		tif->tif_rawcc = td->td_stripbytecount[strip];
651 			(tsample_t)(strip / td->td_stripsperimage)));