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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /dviware/dvi2pcl/preamble.c
Initial commit
Diffstat (limited to 'dviware/dvi2pcl/preamble.c')
-rw-r--r--dviware/dvi2pcl/preamble.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/dviware/dvi2pcl/preamble.c b/dviware/dvi2pcl/preamble.c
new file mode 100644
index 0000000000..7872af1927
--- /dev/null
+++ b/dviware/dvi2pcl/preamble.c
@@ -0,0 +1,74 @@
+/* $Log: preamble.c,v $
+ * Revision 0.8 92/11/23 19:46:54 19:46:54 bt (Bo Thide')
+ * Fixed resolution bug. Portable downloading. Added/changed options. PJXL color support
+ *
+ * Revision 0.7 92/11/13 02:41:39 02:41:39 bt (Bo Thide')
+ * More bug fixes and improvements. Support for PaintJet XL
+ *
+ * Revision 0.6 92/11/10 21:48:37 21:48:37 bt (Bo Thide')
+ * Bug fixes. Added -R option. Better font handling.
+ *
+ * Revision 0.5 92/11/09 16:25:43 16:25:43 bt (Bo Thide')
+ * Rewrite of dospecial.c. Extended \special support
+ *
+ * Revision 0.4 92/11/08 02:45:59 02:45:59 bt (Bo Thide')
+ * Changed to portable bit manipulations. Replaced strrstr for non-POSIX compliant C. Fixed numerous bugs. Added support for more \special's.
+ *
+ * Revision 0.3 92/08/24 12:45:49 12:45:49 bt (Bo Thide')
+ * Fixed 8 bit (dc font) support.
+ *
+ * Revision 0.2 92/08/23 17:29:00 17:29:00 bt (Bo Thide')
+ * Source cleaned up. Changed certain function calls. Removed globals.
+ *
+ * Revision 0.1 92/08/22 23:58:48 23:58:48 bt (Bo Thide')
+ * First Release.
+ * */
+
+/*
+ * This routine processes the preamble and determines the global variables
+ * 'conv' and 'magnification'. It exits if a fatal error is found in the
+ * preamble.
+ */
+
+#include <stdio.h>
+#include "dvi.h"
+#include "globals.h"
+#include "macros.h"
+
+static char rcsid[] = "$Header: preamble.c,v 0.8 92/11/23 19:46:54 bt Exp $";
+
+preamble(dvifile, resolution)
+FILE *dvifile;
+short resolution;
+{
+ ubyte p;
+
+ if(getubyte(dvifile) != DVI_PRE)
+ sterror("Bad %s file: First byte is not start of preamble\n",
+ DVIFILE_SUFFIX);
+ if(getubyte(dvifile) != 2)
+ fprintf(stderr,"Identifier in byte 1 should be '2'");
+ numerator = (long)getsquad(dvifile);
+ denominator = (long)getsquad(dvifile);
+
+#ifdef DEBUG
+ fprintf (stderr,"preamble: numerator=%d, denominator=%d\n",numerator,denominator);
+#endif /* DEBUG */
+
+ if(numerator <= 0)
+ valerror("Bad .dvi file: Numerator is %d\n" , numerator);
+ if(denominator <= 0 )
+ valerror("Bad .dvi file: Denominator is %d\n" , denominator);
+ magnification = (long)getsquad(dvifile);
+ conv = ((double)numerator/254000.0)*(double)resolution*(double)magnification/((double)denominator*1000.0) ;
+
+#ifdef DEBUG
+ fprintf (stderr,"preamble: magnification=%d, conv=%g\n",magnification,conv);
+#endif /* DEBUG */
+
+ p = getubyte(dvifile);
+
+#ifdef DEBUG2
+ fprintf (stderr,"preamble: p = %d\n",p);
+#endif /* DEBUG2 */
+}