* src/cache/ftccmap.c: the cmap cache now supports UCS-4 charmaps

when available in Asian fonts

    * src/sfnt/ttload.c, src/base/ftobjs.c: changed "asian" to "Asian" in
    comments

    * src/truetype/ttdriver.c (Set_Char_Sizes): fixed a rounding bug when
    computing the scale factors for a given character size in points with
    resolution.

ChangeLog

@@ -1,27 +1,38 @@
+2003-02-25  Anthony Fok  <anthony@thizlinux.com>
+
+    * src/cache/ftccmap.c: the cmap cache now supports UCS-4 charmaps
+    when available in Asian fonts
+
+    * src/sfnt/ttload.c, src/base/ftobjs.c: changed "asian" to "Asian" in
+    comments
+
 2003-02-25  David Turner  <david@freetype.org>
 
     * src/gzip/ftgzip.c: fixed a bug that caused FreeType to loop endlessly
     when trying to read certain compressed gzip files. The following test
     could be used to reveal the bug:
-    
+
        touch 0123456789 ; gzip 0123456789 ; ftdump 0123456789.gz
 
 
     * src/pfr/pfrobjs.c, src/pfr/pfrload.c, src/pfr/pfrtypes.h: several
     fixes to the PFR font driver:
-    
+
       - the list of available embedded bitmaps was not correctly set
         in the root FT_FaceRec structure describing the face
-      
+
       - the glyph loader always tried to load the outlines when
         FT_LOAD_SBITS_ONLY was specified
-        
+
       - the table loaded now scans for *undocumented* elements of a
         physical font's auxiliary data record, this is necessary to
         retrieve the "real" family and style names.
-        
+
         NOTE THAT THIS CHANGES THE FAMILY NAME OF MANY PFR FONTS !!
 
+    * src/truetype/ttdriver.c (Set_Char_Sizes): fixed a rounding bug when
+    computing the scale factors for a given character size in points with
+    resolution.
 
 
 2003-02-18  David Turner  <david@freetype.org>

src/base/ftobjs.c

@@ -739,7 +739,7 @@
      *  however, recent updates to the Apple and OpenType specifications
      *  introduced new formats that are capable of mapping 32-bit character
      *  codes as well. And these are already used on some fonts, mainly to
-     *  map non-BMP asian ideographs as defined in Unicode.
+     *  map non-BMP Asian ideographs as defined in Unicode.
      *
      *  for compatibility purposes, these fonts generally come with
      *  *several* Unicode charmaps:

src/cache/ftccmap.c

@@ -23,6 +23,7 @@
 #include FT_CACHE_MANAGER_H
 #include FT_INTERNAL_MEMORY_H
 #include FT_INTERNAL_DEBUG_H
+#include FT_TRUETYPE_IDS_H
 
 #include "ftcerror.h"
 
@@ -189,10 +190,54 @@
         break;
 
       case FTC_CMAP_BY_ENCODING:
-        for ( idx = 0; idx < count; idx++, cur++ )
-          if ( cur[0]->encoding == desc->u.encoding )
-            break;
+        if (desc->u.encoding == FT_ENCODING_UNICODE)
+        {
+         /* since the `interesting' table, with id's 3,10, is normally the
+          * last one, we loop backwards. This looses with type1 fonts with
+          * non-BMP characters (<.0001%), this wins with .ttf with non-BMP
+          * chars (.01% ?), and this is the same about 99.99% of the time!
+          */
 
+          FT_UInt  unicmap_idx = count;  /* some UCS-2 map, if we found it */
+
+          cur += count - 1;
+
+          for ( idx = 0; idx < count; idx++, cur-- )
+          {
+            if ( cur[0]->encoding == FT_ENCODING_UNICODE )
+            {
+              unicmap_idx = idx;  /* record we found a Unicode charmap */
+
+             /* XXX If some new encodings to represent UCS-4 are added,
+              *     they should be added here.
+              */
+              if ( ( cur[0]->platform_id == TT_PLATFORM_MICROSOFT &&
+                     cur[0]->encoding_id == TT_MS_ID_UCS_4        )          ||
+                   ( cur[0]->platform_id == TT_PLATFORM_APPLE_UNICODE &&
+                     cur[0]->encoding_id == TT_APPLE_ID_UNICODE_32    )      )
+
+              /* Hurray! We found a UCS-4 charmap. We can stop the scan! */
+              {
+                idx = count - 1 - idx;
+                goto Found_idx_for_FTC_CMAP_BY_ENCODING;
+              }
+            }
+          }
+
+         /* We do not have any UCS-4 charmap. Sigh.
+          * Let's see if we have some other kind of Unicode charmap, though.
+          */
+          if ( unicmap_idx < count )
+            idx = count - 1 - unicmap_idx;
+        }
+        else
+        {
+          for ( idx = 0; idx < count; idx++, cur++ )
+            if ( cur[0]->encoding == desc->u.encoding )
+              break;
+        }
+
+      Found_idx_for_FTC_CMAP_BY_ENCODING:
         hash = idx * 67;
         break;
 

src/sfnt/ttload.c

@@ -1106,7 +1106,7 @@
     if ( FT_STREAM_READ_FIELDS( name_table_fields, table ) )
       goto Exit;
 
-    /* Some popular asian fonts have an invalid `storageOffset' value   */
+    /* Some popular Asian fonts have an invalid `storageOffset' value   */
     /* (it should be at least "6 + 12*num_names").  However, the string */
     /* offsets, computed as "storageOffset + entry->stringOffset", are  */
     /* valid pointers within the name table...                          */

src/truetype/ttdriver.c

@@ -208,8 +208,8 @@
      /* we need to use rounding in the following computations. Otherwise,
       * the resulting hinted outlines will be very slightly distorted
       */
-      dim_x = ( ( ( char_width  * horz_resolution ) / 72 ) + 32 ) & -64;
-      dim_y = ( ( ( char_height * vert_resolution ) / 72 ) + 32 ) & -64;
+      dim_x = ( char_width  * horz_resolution + 36 ) / 72;
+      dim_y = ( char_height * vert_resolution + 36 ) / 72;
 
       metrics2->x_ppem  = (FT_UShort)( dim_x >> 6 );
       metrics2->y_ppem  = (FT_UShort)( dim_y >> 6 );