forked from minhngoc25a/freetype2
* src/base/ftobjs.c: modified the logic to get Unicode charmaps.
Now it loads UCS-4 charmaps when there is one. * src/base/ftobjs.c (find_unicode_charmap): new function. * src/base/ftobjs.c (open_face): refer to the above one. * src/base/ftobjs.c (FT_Select_Charmap): idem.
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@ -1,3 +1,11 @@
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2002-12-02 Antoine Leca <Antoine-FreetypeLeca-Marti.org>
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* src/base/ftobjs.c: modified the logic to get Unicode charmaps.
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Now it loads UCS-4 charmaps when there is one.
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* src/base/ftobjs.c (find_unicode_charmap): new function.
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* src/base/ftobjs.c (open_face): refer to the above one.
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* src/base/ftobjs.c (FT_Select_Charmap): idem.
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2002-11-29 Antoine Leca <Antoine-FreetypeLeca-Marti.org>
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* include/freetype/ftgzip.h: Correct the name of the controlling
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@ -23,6 +23,7 @@
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#include FT_INTERNAL_DEBUG_H
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#include FT_INTERNAL_STREAM_H
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#include FT_TRUETYPE_TABLES_H
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#include FT_TRUETYPE_IDS_H
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#include FT_OUTLINE_H
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@ -699,6 +700,76 @@
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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/* find_unicode_charmap */
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/* */
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/* <Description> */
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/* This function finds a Unicode charmap, if there is one. */
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/* And if there is more than one, it tries to favour the more */
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/* extensive one, i.e. one that supports UCS-4 against those which */
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/* are limited to the BMP (said UCS-2 encoding.) */
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/* */
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/* This function is called from open_face() (just below), and also */
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/* from FT_Select_Charmap( , FT_ENCODING_UNICODE). */
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/* */
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static FT_Error
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find_unicode_charmap( FT_Face face )
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{
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FT_CharMap* first;
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FT_CharMap* cur;
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FT_CharMap* unicmap = NULL; /* some UCS-2 map, if we found it */
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/* caller should have already checked that `face' is valid */
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FT_ASSERT ( face );
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first = face->charmaps;
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if ( !first )
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return FT_Err_Invalid_CharMap_Handle;
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/* since the `interesting' table, with id's 3,10, is normally the */
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/* last one, we loop backwards. This looses with type1 fonts with */
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/* non-BMP characters (<.0001%), this wins with .ttf with non-BMP */
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/* chars (.01% ?), and this is the same about 99.99% of the time! */
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cur = first + face->num_charmaps; /* points after the last one */
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for ( ; --cur >= first; )
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{
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if ( cur[0]->encoding == FT_ENCODING_UNICODE )
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{
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unicmap = cur; /* record we found a Unicode charmap */
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/* XXX If some new encodings to represent UCS-4 are added, */
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/* they should be added here. */
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if ( ( cur[0]->platform_id == TT_PLATFORM_MICROSOFT
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&& cur[0]->encoding_id == TT_MS_ID_UCS_4 )
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|| ( cur[0]->platform_id == TT_PLATFORM_APPLE_UNICODE
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&& cur[0]->encoding_id == TT_APPLE_ID_UNICODE_32 ) )
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/* Hurray! We found a UCS-4 charmap. We can stop the scan! */
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{
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face->charmap = cur[0];
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return 0;
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}
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}
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}
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/* We do not have any UCS-4 charmap. Sigh. */
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/* Let's see if we have some other kind of Unicode charmap, though. */
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if ( unicmap != NULL )
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{
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face->charmap = unicmap[0];
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return 0;
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}
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/* Chou blanc! */
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return FT_Err_Invalid_Argument;
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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@ -718,7 +789,7 @@
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FT_Memory memory;
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FT_Driver_Class clazz;
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FT_Face face = 0;
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FT_Error error;
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FT_Error error, error2;
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FT_Face_Internal internal;
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@ -748,7 +819,7 @@
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i++ )
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if ( params[i].tag == FT_PARAM_TAG_INCREMENTAL )
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face->internal->incremental_interface = params[i].data;
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}
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}
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#endif
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error = clazz->init_face( stream,
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@ -760,24 +831,14 @@
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goto Fail;
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/* select Unicode charmap by default */
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error2 = find_unicode_charmap( face );
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/* if no Unicode charmap can be found, return FT_Err_Invalid_Argument */
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/* no error should happen, but we want to play safe. */
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if ( error2 && error2 != FT_Err_Invalid_Argument )
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{
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FT_Int nn;
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FT_CharMap unicmap = NULL, cmap;
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for ( nn = 0; nn < face->num_charmaps; nn++ )
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{
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cmap = face->charmaps[nn];
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if ( cmap->encoding == FT_ENCODING_UNICODE )
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{
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unicmap = cmap;
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break;
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}
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}
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if ( unicmap != NULL )
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face->charmap = unicmap;
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error = error2;
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goto Fail;
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}
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*aface = face;
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if ( !face )
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return FT_Err_Invalid_Face_Handle;
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/* FT_ENCODING_UNICODE is special. We try to find the `best' Unicode */
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/* charmap available, i.e. one with UCS-4 characters, if possible. */
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/* */
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/* This is done by find_unicode_charmap() above, to share code. */
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if ( encoding == FT_ENCODING_UNICODE )
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return find_unicode_charmap( face );
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cur = face->charmaps;
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if ( !cur )
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return FT_Err_Invalid_CharMap_Handle;
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