Initial commit

1 files changed, 144 insertions, 0 deletions

diff --git a/dviware/dvipng/vf.c b/dviware/dvipng/vf.c
new file mode 100644
index 0000000000..c6470c6397
--- /dev/null
+++ b/dviware/dvipng/vf.c
@@ -0,0 +1,144 @@
+/* vf.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) 2002-2015 Jan-Åke Larsson
+
+************************************************************************/
+
+#include "dvipng.h"
+
+#define VF_ID 202
+#define LONG_CHAR 242
+
+int32_t SetVF(struct char_entry* ptr)
+{
+  struct font_entry* currentvf;
+  unsigned char *command,*end;
+
+  currentvf=currentfont;
+  BeginVFMacro(currentvf);
+  command = ptr->data;
+  end = command + ptr->length;
+  while (command < end)  {
+    DEBUG_PRINT(DEBUG_DVI,("\n  VF MACRO:\t%s ", dvi_commands[*command]));
+    DrawCommand(command,currentvf);
+    command += CommandLength(command);
+  }
+  EndVFMacro();
+  currentfont=currentvf;
+  return(ptr->tfmw);
+}
+
+
+
+void InitVF(struct font_entry * tfontp)
+{
+  unsigned char* position;
+  int length;
+  struct char_entry *tcharptr;
+  uint32_t c=0;
+  struct font_num *tfontnump;  /* temporary font_num pointer   */
+
+  DEBUG_PRINT((DEBUG_DVI|DEBUG_VF),("\n  OPEN FONT:\t'%s'", tfontp->name));
+  Message(BE_VERBOSE,"<%s>", tfontp->name);
+  if (MmapFile(tfontp->name,&(tfontp->fmmap)))
+    Fatal("font file %s unusable", tfontp->name);
+  position=(unsigned char*)tfontp->fmmap.data;
+  if (*(position) != PRE)
+    Fatal("unknown font format in file %s",tfontp->name);
+  if (*(position+1) != VF_ID)
+      Fatal( "wrong version %d of vf file %s (should be 202)",
+	     (int)*(position+1),tfontp->name);
+  DEBUG_PRINT(DEBUG_VF,("\n  VF_PRE:\t'%.*s'",
+		(int)*(position+2), position+3));
+  position = position+3 + *(position+2);
+  c=UNumRead(position, 4);
+  DEBUG_PRINT(DEBUG_VF,(" %d", c));
+  CheckChecksum (tfontp->c, c, tfontp->name);
+  tfontp->designsize = UNumRead(position+4,4);
+  DEBUG_PRINT(DEBUG_VF,(" %d", tfontp->designsize));
+  tfontp->type = FONT_TYPE_VF;
+  tfontp->vffontnump=NULL;
+  /* Read font definitions */
+  position += 8;
+  while(*position >= FNT_DEF1 && *position <= FNT_DEF4) {
+    DEBUG_PRINT(DEBUG_VF,("\n  @%ld VF:\t%s",
+			  (long)position - (long)tfontp->fmmap.data,
+			  dvi_commands[*position]));
+    FontDef(position,tfontp);
+    length = dvi_commandlength[*position];
+    position += length + *(position + length-1) + *(position+length-2);
+  }
+  /* Default font is the first defined */
+  tfontnump = tfontp->vffontnump;
+  while (tfontnump->next != NULL) {
+    tfontnump = tfontnump->next;
+  }
+  tfontp->defaultfont=tfontnump->k;
+  /* Read char definitions */
+  while(*position < FNT_DEF1) {
+    DEBUG_PRINT(DEBUG_VF,("\n@%ld VF CHAR:\t",
+			  (long)position - (long)tfontp->fmmap.data));
+    if ((tcharptr=malloc(sizeof(struct char_entry)))==NULL)
+      Fatal("cannot allocate memory for VF char entry");
+    switch (*position) {
+    case LONG_CHAR:
+      tcharptr->length = UNumRead(position+1,4);
+      c = UNumRead(position+5,4);
+      tcharptr->tfmw = UNumRead(position+9,4);
+      position += 13;
+      break;
+    default:
+      tcharptr->length = UNumRead(position,1);
+      c = UNumRead(position+1,1);
+      tcharptr->tfmw = UNumRead(position+2,3);
+      position += 5;
+    }
+    DEBUG_PRINT(DEBUG_VF,("%d %d %d",tcharptr->length,c,tcharptr->tfmw));
+    tcharptr->tfmw = (int32_t)
+      ((int64_t) tcharptr->tfmw * tfontp->s / (1 << 20));
+    DEBUG_PRINT(DEBUG_VF,(" (%d)",tcharptr->tfmw));
+    if (c >= NFNTCHARS) /* Only positive for now */
+      Fatal("VF font %s exceeds char numbering limit",tfontp->name);
+    tfontp->chr[c] = tcharptr;
+    tcharptr->data=position;
+    position += tcharptr->length;
+  }
+}
+
+
+void DoneVF(struct font_entry *tfontp)
+{
+  int c=FIRSTFNTCHAR;
+
+  UnMmapFile(&(tfontp->fmmap));
+  while(c<=LASTFNTCHAR) {
+    if (tfontp->chr[c]!=NULL) {
+      free(tfontp->chr[c]);
+      tfontp->chr[c]=NULL;
+    }
+    c++;
+  }
+  FreeFontNumP(tfontp->vffontnump);
+  tfontp->vffontnump=NULL;
+  if (tfontp->name!=NULL)
+    free(tfontp->name);
+  tfontp->name=NULL;
+}