text: /* $Id: strip.c,v 1.4 2008/03/28 01:42:06 bfriesen Exp $ */
  
  /*
   * Copyright (c) 2004, Andrey Kiselev  <dron@ak4719.spb.edu>
   *
   * Permission to use, copy, modify, distribute, and sell this software and 
   * its documentation for any purpose is hereby granted without fee, provided
   * that (i) the above copyright notices and this permission notice appear in
   * all copies of the software and related documentation, and (ii) the names of
   * Sam Leffler and Silicon Graphics may not be used in any advertising or
   * publicity relating to the software without the specific, prior written
   * permission of Sam Leffler and Silicon Graphics.
   * 
   * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
   * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
   * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
   * 
   * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
   * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
   * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
   * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 
   * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
   * OF THIS SOFTWARE.
   */
  
  /*
   * TIFF Library
   *
   * Functions to test strip interface of libtiff.
   */
  
  #include <stdio.h>
  #include <string.h>
  
  #include "tiffio.h"
  
  int
  write_strips(TIFF *tif, const tdata_t array, const tsize_t size)
  {
  	tstrip_t	strip, nstrips;
  	tsize_t		stripsize, offset;
  
  	stripsize = TIFFStripSize(tif);
  	if (!stripsize) {
  		fprintf (stderr, "Wrong size of strip.\n");
  		return -1;
  	}
  
  	nstrips = TIFFNumberOfStrips(tif);
  	for (offset = 0, strip = 0;
  	     offset < size && strip < nstrips;
  	     offset+=stripsize, strip++) {
  		/*
  		 * Properly write last strip.
  		 */
  		tsize_t	bufsize = size - offset;
  		if (bufsize > stripsize)
  			bufsize = stripsize;
  
  		if (TIFFWriteEncodedStrip(tif, strip, (char *)array + offset,
  					  bufsize) != bufsize) {
  			fprintf (stderr, "Can't write strip %lu.\n",
  				 (unsigned long)strip);
  			return -1;
  		}
          }
  
  	return 0;
  }
  
  int
  read_strips(TIFF *tif, const tdata_t array, const tsize_t size)
  {
  	tstrip_t	strip, nstrips;
  	tsize_t		stripsize, offset;
  	tdata_t		buf = NULL;
  
  	stripsize = TIFFStripSize(tif);
  	if (!stripsize) {
  		fprintf (stderr, "Wrong size of strip.\n");
  		return -1;
  	}
  
  	buf = _TIFFmalloc(stripsize);
  	if (!buf) {
  		fprintf (stderr, "Can't allocate space for strip buffer.\n");
  		return -1;
  	}
  
  	nstrips = TIFFNumberOfStrips(tif);
  	for (offset = 0, strip = 0;
  	     offset < size && strip < nstrips;
  	     offset+=stripsize, strip++) {
  		/*
  		 * Properly read last strip.
  		 */
  		tsize_t	bufsize = size - offset;
  		if (bufsize > stripsize)
  			bufsize = stripsize;
  
  		if (TIFFReadEncodedStrip(tif, strip, buf, -1) != bufsize) {
  			fprintf (stderr, "Can't read strip %lu.\n",
  				 (unsigned long)strip);
  			return -1;
  		}
  		if (memcmp(buf, (char *)array + offset, bufsize) != 0) {
  			fprintf (stderr, "Wrong data read for strip %lu.\n",
  				 (unsigned long)strip);
  			_TIFFfree(buf);
  			return -1;
  		}
          }
  
  	_TIFFfree(buf);
  
  	return 0;
  }
  
  int
  create_image_striped(const char *name, uint32 width, uint32 length,
  		      uint32 rowsperstrip, uint16 compression,
  		      uint16 spp, uint16 bps, uint16 photometric,
  		      uint16 sampleformat, uint16 planarconfig,
  		      const tdata_t array, const tsize_t size)
  {
  	TIFF		*tif;
  
  	/* Test whether we can write tags. */
  	tif = TIFFOpen(name, "w");
  	if (!tif)
  		goto openfailure;
  
  	if (!TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, width)) {
  		fprintf (stderr, "Can't set ImageWidth tag.\n");
  		goto failure;
  	}
  	if (!TIFFSetField(tif, TIFFTAG_IMAGELENGTH, length)) {
  		fprintf (stderr, "Can't set ImageLength tag.\n");
  		goto failure;
  	}
  	if (!TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, bps)) {
  		fprintf (stderr, "Can't set BitsPerSample tag.\n");
  		goto failure;
  	}
  	if (!TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, spp)) {
  		fprintf (stderr, "Can't set SamplesPerPixel tag.\n");
  		goto failure;
  	}
  	if (!TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, rowsperstrip)) {
  		fprintf (stderr, "Can't set RowsPerStrip tag.\n");
  		goto failure;
  	}
  	if (!TIFFSetField(tif, TIFFTAG_PLANARCONFIG, planarconfig)) {
  		fprintf (stderr, "Can't set PlanarConfiguration tag.\n");
  		goto failure;
  	}
  	if (!TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, photometric)) {
  		fprintf (stderr, "Can't set PhotometricInterpretation tag.\n");
  		goto failure;
  	}
  
  	if (write_strips(tif, array, size) < 0) {
  		fprintf (stderr, "Can't write image data.\n");
  		goto failure;
  	}
  
  	TIFFClose(tif);
  	return 0;
  
  failure:
  	TIFFClose(tif);
  openfailure:
  	fprintf (stderr, "Can't create test TIFF file %s:\n"
  "    ImageWidth=%ld, ImageLength=%ld, RowsPerStrip=%ld, Compression=%d,\n"
  "    BitsPerSample=%d, SamplesPerPixel=%d, SampleFormat=%d,\n"
  "    PlanarConfiguration=%d, PhotometricInterpretation=%d.\n",
  		 name, (long) width, (long) length, (long) rowsperstrip,
                   compression, bps, spp, sampleformat, planarconfig,
  		 photometric);
  	return -1;
  }
  
  int
  read_image_striped(const char *name, uint32 width, uint32 length,
  		    uint32 rowsperstrip, uint16 compression,
  		    uint16 spp, uint16 bps, uint16 photometric,
  		    uint16 sampleformat, uint16 planarconfig,
  		    const tdata_t array, const tsize_t size)
  {
  	TIFF		*tif;
  	uint16		value_u16;
  	uint32		value_u32;
  
  	/* Test whether we can read written values. */
  	tif = TIFFOpen(name, "r");
  	if (!tif)
  		goto openfailure;
  	
  	if (TIFFIsTiled(tif)) {
  		fprintf (stderr, "Can't read image %s, it is tiled.\n",
  			 name);
  		goto failure;
  	}
  	if (!TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &value_u32)
  	    || value_u32 != width) {
  		fprintf (stderr, "Can't get tag %d.\n", TIFFTAG_IMAGEWIDTH);
  		goto failure;
  	}
  	if (!TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &value_u32)
  	    || value_u32 != length) {
  		fprintf (stderr, "Can't get tag %d.\n", TIFFTAG_IMAGELENGTH);
  		goto failure;
  	}
  	if (!TIFFGetField(tif, TIFFTAG_BITSPERSAMPLE, &value_u16)
  	    || value_u16 != bps) {
  		fprintf (stderr, "Can't get tag %d.\n", TIFFTAG_BITSPERSAMPLE);
  		goto failure;
  	}
  	if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &value_u16)
  	    || value_u16 != photometric) {
  		fprintf (stderr, "Can't get tag %d.\n", TIFFTAG_PHOTOMETRIC);
  		goto failure;
  	}
  	if (!TIFFGetField(tif, TIFFTAG_SAMPLESPERPIXEL, &value_u16)
  	    || value_u16 != spp) {
  		fprintf (stderr, "Can't get tag %d.\n", TIFFTAG_SAMPLESPERPIXEL);
  		goto failure;
  	}
  	if (!TIFFGetField(tif, TIFFTAG_ROWSPERSTRIP, &value_u32)
  	    || value_u32 != rowsperstrip) {
  		fprintf (stderr, "Can't get tag %d.\n", TIFFTAG_ROWSPERSTRIP);
  		goto failure;
  	}
  	if (!TIFFGetField(tif, TIFFTAG_PLANARCONFIG, &value_u16)
  	    || value_u16 != planarconfig) {
  		fprintf (stderr, "Can't get tag %d.\n", TIFFTAG_PLANARCONFIG);
  		goto failure;
  	}
  
  	if (read_strips(tif, array, size) < 0) {
  		fprintf (stderr, "Can't read image data.\n");
  		goto failure;
  	}
  
  	TIFFClose(tif);
  	return 0;
  
  failure:
  	TIFFClose(tif);
  openfailure:
  	fprintf (stderr, "Can't read test TIFF file %s:\n"
  "    ImageWidth=%ld, ImageLength=%ld, RowsPerStrip=%ld, Compression=%d,\n"
  "    BitsPerSample=%d, SamplesPerPixel=%d, SampleFormat=%d,\n"
  "    PlanarConfiguration=%d, PhotometricInterpretation=%d.\n",
  		 name, (long) width, (long) length, (long) rowsperstrip,
                   compression, bps, spp, sampleformat, planarconfig,
  		 photometric);
  	return -1;
  }
  
  int
  write_scanlines(TIFF *tif, const tdata_t array, const tsize_t size)
  {
  	uint32		length, row;
  	tsize_t		scanlinesize, offset;
          (void) size;
  
  	if (!TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &length)) {
  		fprintf (stderr, "Can't get tag %d.\n", TIFFTAG_IMAGELENGTH);
  		return -1;
  	}
  	
  	scanlinesize = TIFFScanlineSize(tif);
  	if (!scanlinesize) {
  		fprintf (stderr, "Wrong size of scanline.\n");
  		return -1;
  	}
  
  	for (offset = 0, row = 0; row < length; offset+=scanlinesize, row++) {
  		if (TIFFWriteScanline(tif, (char *)array + offset, row, 0) < 0) {
  			fprintf (stderr,
  				 "Can't write image data at row %lu.\n", (long) row);
  			return -1;
  		}
          }
  
  	return 0;
  }
  
  /* vim: set ts=8 sts=8 sw=8 noet: */
  