FreeType 1.31.1

lib/extend/ftxgasp.c

@@ -0,0 +1,69 @@
+/*******************************************************************
+ *
+ *  ftxgasp.c                                                   1.0
+ *
+ *    Gasp table support API extension body
+ *
+ *  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.
+ *
+ *
+ *  The gasp table is currently loaded by the core engine, but the
+ *  standard API doesn't give access to it.  This file is used to
+ *  demonstrate the use of a simple API extension.
+ *
+ ******************************************************************/
+
+#include "ftxgasp.h"
+
+#include "tttypes.h"
+#include "ttobjs.h"
+#include "tttables.h"
+
+
+  EXPORT_FUNC
+  TT_Error  TT_Get_Face_Gasp_Flags( TT_Face    face,
+                                    TT_UShort  point_size,
+                                    TT_Bool*   grid_fit,
+                                    TT_Bool*   smooth_font )
+  {
+    PFace   faze = HANDLE_Face( face );
+    UShort  i, flag;
+
+
+    if ( !faze )
+      return TT_Err_Invalid_Face_Handle;
+
+    if ( faze->gasp.numRanges == 0 || !faze->gasp.gaspRanges )
+      return TT_Err_Table_Missing;
+
+    for ( i = 0; i < faze->gasp.numRanges; i++ )
+    {
+      if ( point_size <= faze->gasp.gaspRanges[i].maxPPEM )
+      {
+        flag = faze->gasp.gaspRanges[i].gaspFlag;
+
+        *grid_fit    = ( (flag & GASP_GRIDFIT) != 0 );
+        *smooth_font = ( (flag & GASP_DOGRAY ) != 0 );
+
+        return TT_Err_Ok;
+      }
+    }
+
+    /* for very large fonts we enable font smoothing and discard */
+    /* grid fitting                                              */
+
+    *grid_fit    = 0;
+    *smooth_font = 1;
+
+    return TT_Err_Ok;
+  }
+
+
+/* END */