Package: fontforge Version: 0.0.20050502-1 Severity: minor Tags: patch [I originally intended to send this report to the fontforge-devel mailing list, but somehow I'm unable to subscribe to it.]
I'm trying to use fontforge to convert Metafont fonts to type1 and truetype. To this end, I use mf2pt3[1] to generate a type3 font. Then, I use fontforge to convert the strokes to outlines, and remove overlaps. There is a problem with the orientation of the resulting outlines in certain cases. I'm attaching a minimal test case and a patch. The test case is two variations of the drop-shaped part of an exclamation-mark. They differ only in the orientation of the stroke. With the current version of fontforge in debian, both versions are converted to two concentric shapes instead of the expected single shape. The patch fixes the problem, but I have no way of knowing whether it breaks anything (it doesn't seem to). The rationale for the patch is as follows: After converting a stroke to splines, there are four cases. In all but one of these cases, the splines are reversed. The shapes in the test file trigger the case where they are not. I have added reversal of the splines in that case. [1] http://www.tug.org/tex-archive/fonts/utilities/mf2pt3/ -- System Information: Debian Release: testing/unstable APT prefers unstable APT policy: (500, 'unstable') Architecture: powerpc (ppc) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.11-powerpc Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Versions of packages fontforge depends on: ii libc6 2.3.2.ds1-22 GNU C Library: Shared libraries an ii libfreetype6 2.1.10-1 FreeType 2 font engine, shared lib ii libice6 4.3.0.dfsg.1-14 Inter-Client Exchange library ii libjpeg62 6b-10 The Independent JPEG Group's JPEG ii libpng12-0 1.2.8rel-1 PNG library - runtime ii libsm6 4.3.0.dfsg.1-13 X Window System Session Management ii libtiff4 3.7.2-3 Tag Image File Format (TIFF) libra ii libungif4g 4.1.3-2 shared library for GIF images (run ii libx11-6 4.3.0.dfsg.1-13 X Window System protocol client li ii libxi6 4.3.0.dfsg.1-13 X Window System Input extension li ii xlibs 4.3.0.dfsg.1-13 X Keyboard Extension (XKB) configu ii zlib1g 1:1.2.2-5 compression library - runtime fontforge recommends no packages. -- no debconf information
diff -r -u fontforge-20050502/fontforge/splinestroke.c fontforge-mvz/fontforge/splinestroke.c
--- fontforge-20050502/fontforge/splinestroke.c 2005-01-31 03:11:19.000000000 +0100
+++ fontforge-mvz/fontforge/splinestroke.c 2005-06-09 00:36:03.900358773 +0200
@@ -1560,9 +1560,11 @@
/* I can't always detect an overlap, so let's always do the remove */
/* Sigh, no. That is still too dangerous */
/* Note: SSFixupOverlap will remove internal/external as needed */
- if ( si->removeoverlapifneeded && si->gottoobiglocal && ssplus!=NULL )
+ if ( si->removeoverlapifneeded && si->gottoobiglocal && ssplus!=NULL ) {
+ SplineSetReverse(ssplus);
+ SplineSetReverse(ssminus);
ssplus = SSFixupOverlap(si,sc,ssplus,ssminus);
- else if ( si->removeinternal && ssplus!=NULL ) {
+ } else if ( si->removeinternal && ssplus!=NULL ) {
SplinePointListFree(ssminus);
SplineSetReverse(ssplus);
} else if ( si->removeexternal ) {
tstr10.pt3
Description: PostScript document
