1 files changed, 146 insertions, 0 deletions
diff --git a/tiff/contrib/dbs/tiff-grayscale.c b/tiff/contrib/dbs/tiff-grayscale.c
new file mode 100644
index 0000000..e8f474c
--- /dev/null
+++ b/tiff/contrib/dbs/tiff-grayscale.c
@@ -0,0 +1,146 @@
+/* $Id: tiff-grayscale.c,v 1.4.2.1 2010-06-08 18:50:40 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]);
+        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:
+ */