Attachment 77 Details for Bug 105 – detect OT layout scripts and silgraphite fonts

[patch] detect OT layout scripts and silgraphite fonts

fc2.diff (text/plain), 7.31 KB, created by Daniel Glassey on 2003-11-19 08:02:39 UTC

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Creator: Daniel Glassey

Created: 2003-11-19 08:02:39 UTC

Size: 7.31 KB

patch

obsolete

>Index: fontconfig/fontconfig.h
>===================================================================
>RCS file: /cvs/fontconfig/fontconfig/fontconfig/fontconfig.h,v
>retrieving revision 1.50
>diff -u -w -r1.50 fontconfig.h
>--- fontconfig/fontconfig.h	27 Oct 2003 10:47:53 -0000	1.50
>+++ fontconfig/fontconfig.h	19 Nov 2003 15:29:05 -0000
>@@ -89,6 +89,7 @@
> #define FC_CHARSET	    "charset"		/* CharSet */
> #define FC_LANG		    "lang"		/* String RFC 3066 langs */
> #define FC_FONTVERSION	    "fontversion"	/* Int from 'head' table */
>+#define FC_FONTCAP	    "fontcap"		/* String */
> 
> #define FC_DIR_CACHE_FILE	    "fonts.cache-"FC_CACHE_VERSION
> #define FC_USER_CACHE_FILE	    ".fonts.cache-"FC_CACHE_VERSION
>Index: src/fcfreetype.c
>===================================================================
>RCS file: /cvs/fontconfig/fontconfig/src/fcfreetype.c,v
>retrieving revision 1.42
>diff -u -w -r1.42 fcfreetype.c
>--- src/fcfreetype.c	18 Nov 2003 07:53:04 -0000	1.42
>+++ src/fcfreetype.c	19 Nov 2003 15:29:14 -0000
>@@ -55,6 +55,9 @@
> #include FT_SFNT_NAMES_H
> #include FT_TRUETYPE_IDS_H
> #include FT_TYPE1_TABLES_H
>+#include FT_INTERNAL_STREAM_H
>+#include FT_INTERNAL_SFNT_H
>+#include FT_INTERNAL_TRUETYPE_TYPES_H
> 
> #if HAVE_FT_GET_BDF_PROPERTY
> #include FT_BDF_H
>@@ -361,6 +364,7 @@
>     FT_Library	    ftLibrary;
>     FcChar8	    *family = 0;
>     FcChar8	    *style = 0;
>+	 FcChar8	    *complex = 0;
>     const FcChar8   *foundry = 0;
>     int		    spacing;
>     TT_OS2	    *os2;
>@@ -376,6 +380,7 @@
>     FT_UInt    	    snamei, snamec;
>     FcBool	    family_allocated = FcFalse;
>     FcBool	    style_allocated = FcFalse;
>+	 FcBool	    complex_allocated = FcFalse;
>     int		    family_prio = 0;
>     int		    style_prio = 0;
> 
>@@ -796,6 +801,12 @@
> 	case 9:	width = FC_WIDTH_ULTRAEXPANDED; break;
> 	}
>     }
>+    if (os2 && FcFontCapabilities(face, &complex))
>+    {
>+    	complex_allocated = FcTrue;
>+	if (!FcPatternAddString (pat, FC_FONTCAP, complex))
>+	    goto bail1;
>+    }
> 
>     /*
>      * Type 1: Check for FontInfo dictionary information
>@@ -1051,6 +1062,9 @@
> 	free (family);
>     if (style_allocated)
> 	free (style);
>+    if (complex_allocated)
>+	free (complex);
>+
>     
>     FT_Done_Face (face);
>     FT_Done_FreeType (ftLibrary);
>@@ -2043,3 +2057,178 @@
> 
>     return FcFreeTypeCharSetAndSpacing (face, blanks, &spacing);
> }
>+
>+
>+#define TTAG_GPOS  FT_MAKE_TAG( 'G', 'P', 'O', 'S' )
>+#define TTAG_GSUB  FT_MAKE_TAG( 'G', 'S', 'U', 'B' )
>+#define TTAG_SILF  FT_MAKE_TAG( 'S', 'i', 'l', 'f')
>+#define TT_Err_Ok FT_Err_Ok
>+#define TT_Err_Invalid_Face_Handle FT_Err_Invalid_Face_Handle
>+#define TTO_Err_Empty_Script              0x1005
>+#define TTO_Err_Invalid_SubTable          0x1001
>+
>+
>+void addtag(FcChar8 *complex, FT_ULong tag)
>+{
>+    FcChar8 tagstring[15];
>+    sprintf (tagstring, "otlayout:%c%c%c%c ",
>+       (unsigned char)(tag >> 24),
>+       (unsigned char)((tag & 0xff0000) >> 16),
>+       (unsigned char)((tag & 0xff00) >> 8),
>+       (unsigned char)(tag & 0xff));
>+    strncat(complex, tagstring, 14);
>+}
>+
>+static int compareulong (const void *a, const void *b)
>+{
>+    const FT_ULong *ua = (const FT_ULong *) a;
>+    const FT_ULong *ub = (const FT_ULong *) b;
>+    return *ua - *ub;
>+}
>+
>+
>+FT_Error GetScriptTags(FT_Face face, FT_ULong tabletag, FT_ULong **stags, FT_UShort *script_count)
>+{
>+    FT_ULong         cur_offset, new_offset, base_offset;
>+    FT_UShort        i, num_lookups;
>+    TT_Face          tt_face = (TT_Face)face;
>+    FT_Stream  stream = face->stream;
>+    FT_Error   error;
>+    FT_UShort          n, p;
>+    FT_Memory  memory = stream->memory;
>+
>+    if ( !stream )
>+      return TT_Err_Invalid_Face_Handle;
>+
>+    if (( error = tt_face->goto_table( tt_face, tabletag, stream, 0 ) ))
>+      return error;
>+
>+    base_offset = FT_STREAM_POS();
>+
>+    /* skip version */
>+
>+    if ( FT_STREAM_SEEK( base_offset + 4L ) ||
>+         FT_FRAME_ENTER( 2L ) )
>+      return error;
>+
>+    new_offset = FT_GET_USHORT() + base_offset;
>+
>+    FT_FRAME_EXIT();
>+
>+    cur_offset = FT_STREAM_POS();
>+
>+    if ( FT_STREAM_SEEK( new_offset ) != TT_Err_Ok )
>+      return error;
>+
>+    base_offset = FT_STREAM_POS();
>+
>+    if ( FT_FRAME_ENTER( 2L ) )
>+      return error;
>+
>+    *script_count = FT_GET_USHORT();
>+
>+    FT_FRAME_EXIT();
>+
>+    if ( FT_SET_ERROR (FT_MEM_ALLOC_ARRAY( *stags, *script_count, FT_ULong )) )
>+      return error;
>+
>+    p = 0;
>+    for ( n = 0; n < *script_count; n++ )
>+    {
>+      if ( FT_FRAME_ENTER( 6L ) )
>+        goto Fail;
>+
>+      (*stags)[p] = FT_GET_ULONG();
>+      new_offset = FT_GET_USHORT() + base_offset;
>+
>+      FT_FRAME_EXIT();
>+
>+      cur_offset = FT_STREAM_POS();
>+
>+      if ( FT_STREAM_SEEK( new_offset ) )
>+	goto Fail;
>+
>+      if ( error == TT_Err_Ok )
>+        p++;
>+      else if ( error != TTO_Err_Empty_Script )
>+	goto Fail;
>+
>+      (void)FT_STREAM_SEEK( cur_offset );
>+    }
>+
>+    if (!p)
>+    {
>+      error = TTO_Err_Invalid_SubTable;
>+      goto Fail;
>+    }
>+
>+    // sort the tag list before returning it
>+    qsort(*stags, *script_count, sizeof(FT_ULong), compareulong);
>+
>+    return TT_Err_Ok;
>+
>+  Fail:
>+    FT_FREE( *stags );
>+    return error;
>+}
>+
>+
>+FcBool FcFontCapabilities(FT_Face face, FcChar8 **complex)
>+{
>+    FcBool issilgraphitefont = 0;
>+    FT_Error err;
>+    FT_ULong len = 0;
>+    FT_ULong *gsubtags=NULL, *gpostags=NULL;
>+    FT_UShort gsub_count=0, gpos_count=0, maxsize;
>+    FT_Memory  memory = face->stream->memory;
>+
>+    if (*complex)
>+    {
>+    	free(*complex);
>+	*complex = 0;
>+    }
>+    err = FT_Load_Sfnt_Table(face, TTAG_SILF, 0, 0, &len);
>+    issilgraphitefont = ( err == FT_Err_Ok);
>+
>+    err = GetScriptTags(face, TTAG_GPOS, &gpostags, &gpos_count);
>+    err = GetScriptTags(face, TTAG_GSUB, &gsubtags, &gsub_count);
>+    if (!issilgraphitefont && !gsub_count && !gpos_count)
>+    {
>+    	goto bail;
>+    }
>+
>+    maxsize = ((gpos_count + gsub_count) * 15) + (issilgraphitefont ? 13 : 0);
>+    *complex = (FcChar8 *) malloc (sizeof (FcChar8) * maxsize);
>+    if (issilgraphitefont)
>+    {
>+        strcpy(*complex, "ttable:Silf ");
>+    }
>+    else
>+    {
>+        strcpy(*complex, "");
>+    }
>+
>+   int indx1 = 0, indx2 = 0;
>+      while ((indx1 < gsub_count) || (indx2 < gpos_count)) {
>+         if (indx1 == gsub_count) {
>+            addtag(*complex, gpostags[indx2]);
>+            indx2++;
>+         } else if ((indx2 == gpos_count) || (gsubtags[indx1] < gpostags[indx2])) {
>+            addtag(*complex, gsubtags[indx1]);
>+            indx1++;
>+         } else if (gsubtags[indx1] == gpostags[indx2]) {
>+            addtag(*complex, gsubtags[indx1]);
>+            indx1++;
>+            indx2++;
>+         } else {
>+            addtag(*complex, gpostags[indx2]);
>+            indx2++;
>+         }
>+      }
>+      if (FcDebug () & FC_DBG_PARSE)
>+	printf("complex features in this font: %s\n", *complex);
>+bail:
>+    FT_FREE(gsubtags);
>+    FT_FREE(gpostags);
>+    return (*complex)!=NULL;
>+}
>Index: src/fcname.c
>===================================================================
>RCS file: /cvs/fontconfig/fontconfig/src/fcname.c,v
>retrieving revision 1.21
>diff -u -w -r1.21 fcname.c
>--- src/fcname.c	23 Sep 2003 20:12:20 -0000	1.21
>+++ src/fcname.c	19 Nov 2003 15:29:16 -0000
>@@ -63,6 +63,7 @@
>     { FC_CHARSET,	FcTypeCharSet },
>     { FC_LANG,		FcTypeLangSet },
>     { FC_FONTVERSION,	FcTypeInteger },
>+	 { FC_FONTCAP,	FcTypeString },
> };
> 
> #define NUM_OBJECT_TYPES    (sizeof _FcBaseObjectTypes / sizeof _FcBaseObjectTypes[0])

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