FreeType 1.31.1

lib/ttcmap.h

@@ -0,0 +1,169 @@
+/*******************************************************************
+ *
+ *  ttcmap.h                                                    1.0
+ *
+ *    TrueType Character Mappings
+ *
+ *  Copyright 1996-1999 by
+ *  David Turner, Robert Wilhelm, and Werner Lemberg.
+ *
+ *  This file is part of the FreeType project, and may only be used
+ *  modified and distributed under the terms of the FreeType project
+ *  license, LICENSE.TXT.  By continuing to use, modify, or distribute
+ *  this file you indicate that you have read the license and
+ *  understand and accept it fully.
+ *
+ *
+ ******************************************************************/
+
+#ifndef TTCMAP_H
+#define TTCMAP_H
+
+#include "ttconfig.h"
+#include "tttypes.h"
+
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+  /* format 0 */
+
+  struct  TCMap0_
+  {
+    PByte  glyphIdArray;
+  };
+
+  typedef struct TCMap0_  TCMap0;
+  typedef TCMap0*         PCMap0;
+
+
+  /* format 2 */
+
+  struct  TCMap2SubHeader_
+  {
+    UShort  firstCode;      /* first valid low byte         */
+    UShort  entryCount;     /* number of valid low bytes    */
+    Short   idDelta;        /* delta value to glyphIndex    */
+    UShort  idRangeOffset;  /* offset from here to 1st code */
+  };
+
+  typedef struct TCMap2SubHeader_  TCMap2SubHeader;
+  typedef TCMap2SubHeader*         PCMap2SubHeader;
+
+  struct  TCMap2_
+  {
+    PUShort subHeaderKeys;
+    /* high byte mapping table     */
+    /* value = subHeader index * 8 */
+
+    PCMap2SubHeader  subHeaders;
+    PUShort          glyphIdArray;
+    UShort           numGlyphId;        /* control value */
+  };
+
+  typedef struct TCMap2_  TCMap2;
+  typedef TCMap2*         PCMap2;
+
+
+  /* format 4 */
+
+  struct  TCMap4Segment_
+  {
+    UShort  endCount;
+    UShort  startCount;
+    Short   idDelta;        /* in the specs defined as UShort but the
+                               example there gives negative values... */
+    UShort  idRangeOffset;
+  };
+
+  typedef struct TCMap4Segment_  TCMap4Segment;
+  typedef TCMap4Segment*         PCMap4Segment;
+
+  struct  TCMap4_
+  {
+    UShort  segCountX2;     /* number of segments * 2       */
+    UShort  searchRange;    /* these parameters can be used */
+    UShort  entrySelector;  /* for a binary search          */
+    UShort  rangeShift;
+
+    PCMap4Segment  segments;
+    PUShort        glyphIdArray;
+    UShort         numGlyphId;          /* control value */
+  };
+
+  typedef struct TCMap4_  TCMap4;
+  typedef TCMap4*         PCMap4;
+
+
+  /* format 6 */
+
+  struct  TCMap6_
+  {
+    UShort   firstCode;      /* first character code of subrange      */
+    UShort   entryCount;     /* number of character codes in subrange */
+
+    PUShort  glyphIdArray;
+  };
+
+  typedef struct TCMap6_  TCMap6;
+  typedef TCMap6*         PCMap6;
+
+
+  /* charmap table */
+
+  struct  TCMapTable_
+  {
+    UShort  platformID;
+    UShort  platformEncodingID;
+    UShort  format;
+    UShort  length;
+    UShort  version;
+
+    Bool    loaded;
+    ULong   offset;
+
+    union
+    {
+      TCMap0  cmap0;
+      TCMap2  cmap2;
+      TCMap4  cmap4;
+      TCMap6  cmap6;
+    } c;
+  };
+
+  typedef struct TCMapTable_  TCMapTable;
+  typedef TCMapTable*         PCMapTable;
+
+
+
+  /* Load character mappings directory when face is loaded. */
+  /* The mappings themselves are only loaded on demand.     */
+
+  LOCAL_DEF
+  TT_Error  CharMap_Load( PCMapTable  table,
+                          TT_Stream  input );
+
+
+  /* Destroy one character mapping table */
+
+  LOCAL_DEF
+  TT_Error  CharMap_Free( PCMapTable  table );
+
+
+  /* Use character mapping table to perform mapping */
+
+  LOCAL_DEF
+  UShort  CharMap_Index( PCMapTable  cmap,
+                         UShort      charCode );
+
+  /* NOTE: The PFace type isn't defined at this point */
+
+#ifdef __cplusplus
+  }
+#endif
+
+#endif /* TTCMAP_H */
+
+
+/* END */