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freetype2
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Code Issues 4 Releases Wiki Activity

* src/pfr/pfrobjs.h, src/pfr/pfrobjs.c, src/pfr/pfrload.c, 

src/pfr/pfrtypes.h: adding Kerning support to the PFR driver
This commit is contained in:
David Turner 2002-06-21 07:33:23 +00:00
parent dd5436fbb2
commit 2b55098f1e
9 changed files with 211 additions and 8 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2002-06-21 Sven Neuman <sven@convergence.de>
* src/pfr/pfrobjs.h, src/pfr/pfrobjs.c, src/pfr/pfrload.c,
src/pfr/pfrtypes.h: adding Kerning support to the PFR driver
2002-06-19 Detlef Würkner <TetiSoft@apg.lahn.de>
* src/base/fttype1.c: Include FT_INTERNAL_TYPE42_TYPES_H.

8
README
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@ -10,7 +10,7 @@
is called `libttf'. They are *not* compatible!
FreeType 2.1.1
FreeType 2.1.2
==============
Please read the docs/CHANGES file, it contains IMPORTANT
@ -22,9 +22,9 @@
Note that the FreeType 2 documentation is now available as a
separate package from our sites. See:
ftp://ftp.freetype.org/pub/freetype2/ftdocs-2.1.1.tar.bz2
ftp://ftp.freetype.org/pub/freetype2/ftdocs-2.1.1.tar.gz
ftp://ftp.freetype.org/pub/freetype2/ftdoc211.zip
ftp://ftp.freetype.org/pub/freetype2/ftdocs-2.1.2.tar.bz2
ftp://ftp.freetype.org/pub/freetype2/ftdocs-2.1.2.tar.gz
ftp://ftp.freetype.org/pub/freetype2/ftdoc212.zip
Reports

30
docs/CHANGES
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@ -1,3 +1,33 @@
LATEST CHANGES BETWEEN 2.1.1 and 2.1.0
I. IMPORTANT BUG FIXES
- Many font drivers didn't select a Unicode charmap by default when
a new face was opened (with the FT_CONFIG_OPTION_USE_CMAPS options
enabled), and this caused many application to not be able to
display text correctly with the 2.1.x releases
- The PFR driver had a bug in its composite loading code that produces
incorrectly placed accents with many fonts
- The Type42 driver crashed sometimes due to a nasty bug
- The Type 1 custom encoding charmap didn't handle the case were the
first glyph index wasn't 0
- A serious typo in the TrueType composite loader produced incorrectly
placed glyphs in fonts like "Wingdings" and a few others..
II. MISCELLANEOUS
- The Win32 Visual C++ project file has been updated to include the
PFR driver as well
- "freetype.m4" is now installed by default by "make install" on Unix
systems.
========================================================================
LATEST CHANGES BETWEEN 2.1.1 and 2.1.0
I. IMPORTANT BUG FIXES

2
src/pfr/pfrdrivr.c
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@ -59,7 +59,7 @@
(FT_Slot_LoadFunc) pfr_slot_load,
(FT_CharMap_CharIndexFunc)NULL,
(FT_Face_GetKerningFunc) 0,
(FT_Face_GetKerningFunc) pfr_face_get_kerning,
(FT_Face_AttachFunc) 0,
(FT_Face_GetAdvancesFunc) 0,

83
src/pfr/pfrload.c
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@ -68,7 +68,6 @@
if ( item_list )
{
PFR_ExtraItem extra = item_list;
for ( extra = item_list; extra->parser != NULL; extra++ )
{
@ -501,11 +500,90 @@
}
/* load kerning pair data */
FT_CALLBACK_DEF( FT_Error )
pfr_extra_item_load_kerning_pairs( FT_Byte* p,
FT_Byte* limit,
PFR_PhyFont phy_font )
{
FT_Int count;
FT_UShort base_adj;
FT_UInt flags;
FT_UInt num_pairs;
PFR_KernPair pairs;
FT_Error error = 0;
FT_Memory memory = phy_font->memory;
/* XXX: there may be multiple extra items for kerning */
if ( phy_font->kern_pairs != NULL )
goto Exit;
FT_TRACE2(( "pfr_extra_item_load_kerning_pairs()\n" ));
PFR_CHECK( 4 );
num_pairs = PFR_NEXT_BYTE( p );
base_adj = PFR_NEXT_SHORT( p );
flags = PFR_NEXT_BYTE( p );
#ifndef PFR_CONFIG_NO_CHECKS
count = 3;
if ( flags & PFR_KERN_2BYTE_CHAR )
count += 2;
if ( flags & PFR_KERN_2BYTE_ADJ )
count += 1;
PFR_CHECK( num_pairs * count );
#endif
if ( FT_NEW_ARRAY( pairs, num_pairs ) )
goto Exit;
phy_font->num_kern_pairs = num_pairs;
phy_font->kern_pairs = pairs;
for (count = num_pairs ; count > 0; count--, pairs++ )
{
if ( flags & PFR_KERN_2BYTE_CHAR )
{
pairs->glyph1 = PFR_NEXT_USHORT( p );
pairs->glyph2 = PFR_NEXT_USHORT( p );
}
else
{
pairs->glyph1 = PFR_NEXT_BYTE( p );
pairs->glyph2 = PFR_NEXT_BYTE( p );
}
if ( flags & PFR_KERN_2BYTE_ADJ )
pairs->kerning.x = base_adj + PFR_NEXT_SHORT( p );
else
pairs->kerning.x = base_adj + PFR_NEXT_INT8( p );
pairs->kerning.y = 0;
FT_TRACE2(( "kerning %d <-> %d : %ld\n",
pairs->glyph1, pairs->glyph2, pairs->kerning.x ));
}
Exit:
return error;
Too_Short:
error = PFR_Err_Invalid_Table;
FT_ERROR(( "pfr_extra_item_load_kerning_pairs: invalid kerning pairs table\n" ));
goto Exit;
}
static const PFR_ExtraItemRec pfr_phy_font_extra_items[] =
{
{ 1, (PFR_ExtraItem_ParseFunc) pfr_extra_item_load_bitmap_info },
{ 2, (PFR_ExtraItem_ParseFunc) pfr_extra_item_load_font_id },
{ 3, (PFR_ExtraItem_ParseFunc) pfr_extra_item_load_stem_snaps },
{ 4, (PFR_ExtraItem_ParseFunc) pfr_extra_item_load_kerning_pairs },
{ 0, NULL }
};
@ -533,6 +611,9 @@
FT_FREE( phy_font->blue_values );
phy_font->num_blue_values = 0;
FT_FREE( phy_font->kern_pairs );
phy_font->num_kern_pairs = 0;
}

60
src/pfr/pfrobjs.c
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@ -180,6 +180,10 @@
if (root->num_charmaps)
root->charmap = root->charmaps[0];
}
/* check if we've loaded any kerning pairs */
if (phy_font->num_kern_pairs)
root->face_flags |= FT_FACE_FLAG_KERNING;
}
Exit:
@ -318,4 +322,60 @@
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** KERNING METHOD *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
/* XXX: This relies on the font being spec-conformant, i.e. that the
kerning pairs are sorted. We might want to sort it just to make
sure */
#undef PFR_KERN_INDEX
#define PFR_KERN_INDEX( g1, g2 ) ( ( (FT_ULong)g1 << 16 ) | g2 )
/* find the kerning for a given glyph pair */
FT_LOCAL_DEF( FT_Error )
pfr_face_get_kerning( PFR_Face face,
FT_UInt glyph1,
FT_UInt glyph2,
FT_Vector* kerning )
{
PFR_PhyFont phy_font = &face->phy_font;
PFR_KernPair min, mid, max;
FT_ULong idx = PFR_KERN_INDEX( glyph1, glyph2 );
/* simple binary search */
min = phy_font->kern_pairs;
max = min + phy_font->num_kern_pairs;
while ( min < max )
{
FT_ULong midi;
mid = min + ( max - min ) / 2;
midi = PFR_KERN_INDEX( mid->glyph1, mid->glyph2 );
if ( midi == idx )
{
*kerning = mid->kerning;
goto Exit;
}
if ( midi < idx )
min = mid + 1;
else
max = mid;
}
kerning->x = 0;
kerning->y = 0;
Exit:
return 0;
}
/* END */

7
src/pfr/pfrobjs.h
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@ -65,6 +65,13 @@ FT_BEGIN_HEADER
pfr_face_done( PFR_Face face );
FT_LOCAL( FT_Error )
pfr_face_get_kerning( PFR_Face face,
FT_UInt glyph1,
FT_UInt glyph2,
FT_Vector* kerning );
FT_LOCAL( FT_Error )
pfr_slot_init( PFR_Slot slot );

22
src/pfr/pfrtypes.h
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@ -189,6 +189,15 @@ FT_BEGIN_HEADER
} PFR_DimensionRec, *PFR_Dimension;
/************************************************************************/
typedef struct PFR_KernPairRec_
{
FT_UInt glyph1;
FT_UInt glyph2;
FT_Vector kerning;
} PFR_KernPairRec, *PFR_KernPair;
/************************************************************************/
@ -221,7 +230,10 @@ FT_BEGIN_HEADER
FT_UInt num_chars;
FT_UInt32 chars_offset;
PFR_Char chars;
FT_UInt num_kern_pairs;
PFR_KernPairRec *kern_pairs;
} PFR_PhyFontRec, *PFR_PhyFont;
@ -238,6 +250,14 @@ FT_BEGIN_HEADER
} PFR_PhyFlags;
typedef enum PFR_KernFlags_
{
PFR_KERN_2BYTE_ADJ = 0x01,
PFR_KERN_2BYTE_CHAR = 0x02
} PFR_KernFlags;
/************************************************************************/
typedef enum PFR_GlyphFlags_

2
src/type42/t42parse.c
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@ -629,7 +629,7 @@
goto Fail;
}
v = (FT_Byte)( 16 * t42_hexval( *cur ) + t42_hexval( *( cur + 1 ) ) );
v = (FT_Byte)( 16 * t42_hexval( cur[0] ) + t42_hexval( cur[1] ) );
cur += 2;
string_size++;
}