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Diffstat (limited to 'dviware/dvipng/tfm.c')
-rw-r--r--dviware/dvipng/tfm.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/dviware/dvipng/tfm.c b/dviware/dvipng/tfm.c
new file mode 100644
index 0000000000..5bfdb4b2b8
--- /dev/null
+++ b/dviware/dvipng/tfm.c
@@ -0,0 +1,78 @@
+/* tfm.c */
+
+/************************************************************************
+
+ Part of the dvipng distribution
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation, either version 3 of the
+ License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this program. If not, see
+ <http://www.gnu.org/licenses/>.
+
+ Copyright (C) 2002-2009 Jan-Åke Larsson
+
+************************************************************************/
+
+#include "dvipng.h"
+
+bool ReadTFM(struct font_entry * tfontp, char* tfmname)
+{
+ struct filemmap fmmap;
+ struct char_entry *tcharptr;
+ unsigned char *position;
+ int lh,bc,ec,nw, c;
+ dviunits* width;
+
+ DEBUG_PRINT((DEBUG_DVI|DEBUG_FT|DEBUG_TFM),
+ ("\n OPEN METRICS:\t'%s'", tfmname));
+ if (MmapFile(tfmname,&fmmap)) return(false);
+ position=(unsigned char*)fmmap.data;
+ lh = UNumRead(position+2,2);
+ bc = UNumRead(position+4,2);
+ ec = UNumRead(position+6,2);
+ nw = UNumRead(position+8,2);
+ DEBUG_PRINT(DEBUG_TFM,(" %d %d %d %d",lh,bc,ec,nw));
+ if (nw>0) {
+ if ((width=malloc(nw*sizeof(dviunits)))==NULL)
+ Fatal("cannot allocate memory for TFM widths");
+ c=0;
+ position=position+24+(lh+ec-bc+1)*4;
+ while( c < nw ) {
+ width[c] = SNumRead(position,4);
+ c++;
+ position += 4;
+ }
+ /* Read char widths */
+ c=bc;
+ position=(unsigned char*)fmmap.data+24+lh*4;
+ while(c <= ec) {
+ DEBUG_PRINT(DEBUG_TFM,("\n@%ld TFM METRICS:\t",
+ (long)position - (long)fmmap.data));
+ if ((tcharptr=malloc(sizeof(struct char_entry)))==NULL)
+ Fatal("cannot allocate memory for TFM char entry");
+ tcharptr->data=NULL;
+ tcharptr->tfmw=width[*position];
+ DEBUG_PRINT(DEBUG_TFM,("%d [%d] %d",c,*position,tcharptr->tfmw));
+ tcharptr->tfmw = (dviunits)
+ ((int64_t) tcharptr->tfmw * tfontp->s / (1 << 20));
+ DEBUG_PRINT(DEBUG_TFM,(" (%d)",tcharptr->tfmw));
+ if (c >= NFNTCHARS) /* Only positive for now */
+ Fatal("tfm file %s exceeds char numbering limit",tfmname);
+ tfontp->chr[c] = tcharptr;
+ c++;
+ position += 4;
+ }
+ free(width);
+ }
+ UnMmapFile(&fmmap);
+ return(true);
+}