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authorJörg Frings-Fürst <debian@jff-webhosting.net>2015-11-06 05:38:49 +0100
committerJörg Frings-Fürst <debian@jff-webhosting.net>2015-11-06 05:38:49 +0100
commit9491825ddff7a294d1f49061bae7044e426aeb2e (patch)
tree06e651099f87140ec534ae47fb8ce1ac6ec7976d /tiff/contrib/dbs/tiff-grayscale.c
parentfa756339d4204bff7f2820067f58214d32780d17 (diff)
Imported Upstream version 1.8.3
Diffstat (limited to 'tiff/contrib/dbs/tiff-grayscale.c')
-rwxr-xr-xtiff/contrib/dbs/tiff-grayscale.c147
1 files changed, 147 insertions, 0 deletions
diff --git a/tiff/contrib/dbs/tiff-grayscale.c b/tiff/contrib/dbs/tiff-grayscale.c
new file mode 100755
index 0000000..00b229f
--- /dev/null
+++ b/tiff/contrib/dbs/tiff-grayscale.c
@@ -0,0 +1,147 @@
+/* $Id: tiff-grayscale.c,v 1.6 2010-06-08 18:55:15 bfriesen Exp $ */
+
+/*
+ * tiff-grayscale.c -- create a Class G (grayscale) TIFF file
+ * with a gray response curve in linear optical density
+ *
+ * Copyright 1990 by Digital Equipment Corporation, Maynard, Massachusetts.
+ *
+ * All Rights Reserved
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted,
+ * provided that the above copyright notice appear in all copies and that
+ * both that copyright notice and this permission notice appear in
+ * supporting documentation, and that the name of Digital not be
+ * used in advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ *
+ * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+ * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "tiffio.h"
+
+#define WIDTH 512
+#define HEIGHT WIDTH
+
+char * programName;
+void Usage();
+
+int main(int argc, char **argv)
+{
+ int bits_per_pixel = 8, cmsize, i, j, k,
+ gray_index, chunk_size = 32, nchunks = 16;
+ unsigned char * scan_line;
+ uint16 * gray;
+ float refblackwhite[2*1];
+ TIFF * tif;
+
+ programName = argv[0];
+
+ if (argc != 4)
+ Usage();
+
+ if (!strcmp(argv[1], "-depth"))
+ bits_per_pixel = atoi(argv[2]);
+ else
+ Usage();
+
+ switch (bits_per_pixel) {
+ case 8:
+ nchunks = 16;
+ chunk_size = 32;
+ break;
+ case 4:
+ nchunks = 4;
+ chunk_size = 128;
+ break;
+ case 2:
+ nchunks = 2;
+ chunk_size = 256;
+ break;
+ default:
+ Usage();
+ }
+
+ cmsize = nchunks * nchunks;
+ gray = (uint16 *) malloc(cmsize * sizeof(uint16));
+
+ gray[0] = 3000;
+ for (i = 1; i < cmsize; i++)
+ gray[i] = (uint16) (-log10((double) i / (cmsize - 1)) * 1000);
+
+ refblackwhite[0] = 0.0;
+ refblackwhite[1] = (float)((1L<<bits_per_pixel) - 1);
+
+ if ((tif = TIFFOpen(argv[3], "w")) == NULL) {
+ fprintf(stderr, "can't open %s as a TIFF file\n", argv[3]);
+ free(gray);
+ return 0;
+ }
+
+ TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, WIDTH);
+ TIFFSetField(tif, TIFFTAG_IMAGELENGTH, HEIGHT);
+ TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, bits_per_pixel);
+ TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
+ TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
+ TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 1);
+ TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, 1);
+ TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
+ TIFFSetField(tif, TIFFTAG_REFERENCEBLACKWHITE, refblackwhite);
+ TIFFSetField(tif, TIFFTAG_TRANSFERFUNCTION, gray);
+ TIFFSetField(tif, TIFFTAG_RESOLUTIONUNIT, RESUNIT_NONE);
+
+ scan_line = (unsigned char *) malloc(WIDTH / (8 / bits_per_pixel));
+
+ for (i = 0; i < HEIGHT; i++) {
+ for (j = 0, k = 0; j < WIDTH;) {
+ gray_index = (j / chunk_size) + ((i / chunk_size) * nchunks);
+
+ switch (bits_per_pixel) {
+ case 8:
+ scan_line[k++] = gray_index;
+ j++;
+ break;
+ case 4:
+ scan_line[k++] = (gray_index << 4) + gray_index;
+ j += 2;
+ break;
+ case 2:
+ scan_line[k++] = (gray_index << 6) + (gray_index << 4)
+ + (gray_index << 2) + gray_index;
+ j += 4;
+ break;
+ }
+ }
+ TIFFWriteScanline(tif, scan_line, i, 0);
+ }
+
+ free(scan_line);
+ TIFFClose(tif);
+ return 0;
+}
+
+void
+Usage()
+{
+ fprintf(stderr, "Usage: %s -depth (8 | 4 | 2) tiff-image\n", programName);
+ exit(0);
+}
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 8
+ * fill-column: 78
+ * End:
+ */