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June 2007

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2007.06.28 13:20 "patches to tiff2ps-3.8.2 for 16 bit samples", by William Bader

2007.06.29 14:01 "Re: patches to tiff2ps-3.8.2 for 16 bit samples", by William Bader

2007.06.29 14:01 "Re: patches to tiff2ps-3.8.2 for 16 bit samples", by William Bader

The patches are at http://williambader.com/pat/tiff-3.8.2.pat
and below:
--- tiff-3.8.2/tools/tiff2ps.c- 2006-03-03 13:09:45.000000000 +0100
+++ tiff-3.8.2/tools/tiff2ps.c  2007-06-20 14:17:52.000000000 +0200
@@ -350,6 +350,8 @@
        switch (bitspersample) {
        case 1: case 2:
        case 4: case 8:
+       /* wb 20Ju07 allow 16 bits */
+       case 16:
                break;
        default:
                TIFFError(filename, "Can not handle %d-bit/sample image",
@@ -434,7 +436,9 @@
                break;
        case RESUNIT_NONE:
        default:
-               xres *= PS_UNIT_SIZE, yres *= PS_UNIT_SIZE;
+               /* wb 20Jun07 check that the resolution is not inches before 
scaling it */
+               if (xres != PS_UNIT_SIZE || yres != PS_UNIT_SIZE)
+                       xres *= PS_UNIT_SIZE, yres *= PS_UNIT_SIZE;
                break;
        }
        *pprh = PSUNITS(*ph, yres);
@@ -1173,6 +1177,26 @@
        return(use_rawdata);
}

+/* Flip the byte order of buffers with 16 bit samples */
+static void
+PS_FlipBytes(char* buf, int count)
+{
+       int i;
+       char temp;
+
+       if (count <= 0 || bitspersample <= 8) {
+               return;
+       }
+
+       count--;
+
+       for (i = 0; i < count; i += 2) {
+               temp = buf[ i ];
+               buf[ i ] = buf[ i + 1 ];
+               buf[ i + 1 ] = temp;
+       }
+}
+
#define MAXLINE                36

int
@@ -1278,6 +1302,10 @@
                        if (ascii85)
                                Ascii85Put('\0', fd);
                }
+               /* wb 20Jun07 for 16 bits, the two bytes must be most 
significant byte first */
+               if (bitspersample == 16 && !TIFFIsBigEndian(tif)) {
+                       PS_FlipBytes(buf_data, byte_count);
+               }
                /*
                 * For images with alpha, matte against a white background;
                 * i.e. Cback * (1 - Aimage) where Cback = 1. We will fill 
the
@@ -1476,6 +1504,10 @@
                if (TIFFReadScanline(tif, tf_buf, row, 0) < 0)
                        break;
                cp = tf_buf;
+               /* wb 20Jun07 for 16 bits, the two bytes must be most 
significant byte first */
+               if (bitspersample == 16 && !HOST_BIGENDIAN) {
+                       PS_FlipBytes(cp, tf_bytesperrow);
+               }
                if (alpha) {
                        int adjust;
                        cc = 0;
@@ -1677,6 +1709,10 @@
                                *cp = ~*cp;
                        cp++;
                }
+               /* wb 20Jun07 for 16 bits, the two bytes must be most 
significant byte first */
+               if (bitspersample == 16 && !HOST_BIGENDIAN) {
+                       PS_FlipBytes(cp, cc);
+               }
                if (ascii85) {
#if defined( EXP_ASCII85ENCODER )
                        if (alpha) {

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