minhngoc25a
/
freetype2
mirror of git://git.savannah.gnu.org/freetype/freetype2.git
2
1
Fork 2
Code Issues 4 Releases Wiki Activity

Introduce experimental autofit CJK module based on akito's autohint 

patch.  You need to #define AF_MOD_CJK in afcjk.c to enable it.

* src/autofit/afglobal.c, src/autofit/afcjk.h, src/autofit/afcjk.c,
src/autofit/rules.mk, src/autofit/autofit.c, src/autofit/aftypes.h:
Add CJK module based on akito's autohint patch.

* src/autofit/afhints.h (AF_SegmentRec): New field `len' for the
overlap length of the segments.  (AF_SEGMENT_LEN, AF_SEGMENT_DIST):
New macros.

* src/autofit/aflatin.h (af_latin_metrics_init_widths),
src/autofit/aflatin.c (af_latin_metrics_init_widths): Made `FT_LOCAL'.
Use the character given by the caller.
(af_latin_metrics_init_widths, af_latin_hints_link_segments): Scale
the thresholds.

* src/autofit/afloader.c (af_loader_load_g): Respect
AF_SCALER_FLAG_NO_ADVANCE.
This commit is contained in:
Wu, Chia-I (吳佳一) 2006-02-09 14:17:04 +00:00
parent 6be99f9104
commit 4cdb45c01e
11 changed files with 1607 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
ChangeLog
View File

@ -1,3 +1,25 @@
2006-02-09 Chia-I Wu <b90201047@ntu.edu.tw>
Introduce experimental autofit CJK module based on akito's autohint
patch. You need to #define AF_MOD_CJK in afcjk.c to enable it.
* src/autofit/afglobal.c, src/autofit/afcjk.h, src/autofit/afcjk.c,
src/autofit/rules.mk, src/autofit/autofit.c, src/autofit/aftypes.h:
Add CJK module based on akito's autohint patch.
* src/autofit/afhints.h (AF_SegmentRec): New field `len' for the
overlap length of the segments. (AF_SEGMENT_LEN, AF_SEGMENT_DIST):
New macros.
* src/autofit/aflatin.h (af_latin_metrics_init_widths),
src/autofit/aflatin.c (af_latin_metrics_init_widths): Made `FT_LOCAL'.
Use the character given by the caller.
(af_latin_metrics_init_widths, af_latin_hints_link_segments): Scale
the thresholds.
* src/autofit/afloader.c (af_loader_load_g): Respect
AF_SCALER_FLAG_NO_ADVANCE.
2006-02-09 Werner Lemberg <wl@gnu.org>
* src/cid/cidparse.c (cid_parse_new): Remove shadowing variable.

1508
src/autofit/afcjk.c Normal file
View File

File diff suppressed because it is too large Load Diff

41
src/autofit/afcjk.h Normal file
View File

@ -0,0 +1,41 @@
/***************************************************************************/
/* */
/* afcjk.h */
/* */
/* Auto-fitter hinting routines for CJK script (specification). */
/* */
/* Copyright 2006 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. */
/* */
/***************************************************************************/
#ifndef __AFCJK_H__
#define __AFCJK_H__
#include "afhints.h"
FT_BEGIN_HEADER
/* the CJK-specific script class */
FT_CALLBACK_TABLE const AF_ScriptClassRec
af_cjk_script_class;
/* */
FT_END_HEADER
#endif /* __AFCJK_H__ */
/* END */

4
src/autofit/afglobal.c
View File

@ -4,7 +4,7 @@
/* */
/* Auto-fitter routines to compute global hinting values (body). */
/* */
/* Copyright 2003, 2004, 2005 by */
/* Copyright 2003, 2004, 2005, 2006 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -19,6 +19,7 @@
#include "afglobal.h"
#include "afdummy.h"
#include "aflatin.h"
#include "afcjk.h"
#include "aferrors.h"
@ -27,6 +28,7 @@
{
&af_dummy_script_class,
&af_latin_script_class,
&af_cjk_script_class,
NULL /* do not remove */
};

9
src/autofit/afhints.h
View File

@ -133,6 +133,7 @@ FT_BEGIN_HEADER
AF_Segment serif; /* primary segment for serifs */
FT_Pos num_linked; /* number of linked segments */
FT_Pos score; /* used during stem matching */
FT_Pos len; /* used during stem matching */
AF_Point first; /* first point in edge segment */
AF_Point last; /* last point in edge segment */
@ -285,6 +286,14 @@ FT_BEGIN_HEADER
/* */
#define AF_SEGMENT_LEN( seg ) \
( ( seg )->max_coord - ( seg )->min_coord )
#define AF_SEGMENT_DIST( seg1, seg2 ) \
( ( ( seg1 )->pos > ( seg2 )->pos ) \
? ( seg1 )->pos - ( seg2 )->pos \
: ( seg2 )->pos - ( seg1 )->pos )
FT_END_HEADER

22
src/autofit/aflatin.c
View File

@ -33,9 +33,10 @@
/*************************************************************************/
/*************************************************************************/
static void
FT_LOCAL_DEF( void )
af_latin_metrics_init_widths( AF_LatinMetrics metrics,
FT_Face face )
FT_Face face,
FT_ULong charcode )
{
/* scan the array of segments in each direction */
AF_GlyphHintsRec hints[1];
@ -46,7 +47,6 @@
metrics->axis[AF_DIMENSION_HORZ].width_count = 0;
metrics->axis[AF_DIMENSION_VERT].width_count = 0;
/* For now, compute the standard width and height from the `o'. */
{
FT_Error error;
FT_UInt glyph_index;
@ -55,7 +55,7 @@
AF_Scaler scaler = &dummy->scaler;
glyph_index = FT_Get_Char_Index( face, 'o' );
glyph_index = FT_Get_Char_Index( face, charcode );
if ( glyph_index == 0 )
goto Exit;
@ -127,7 +127,7 @@
/* Now, compute the edge distance threshold as a fraction of the */
/* smallest width in the font. Set it in `hinter->glyph' too! */
if ( edge_distance_threshold == 32000 )
edge_distance_threshold = 50;
edge_distance_threshold = 50 * metrics->units_per_em / 2048;
/* let's try 20% */
axis->edge_distance_threshold = edge_distance_threshold / 5;
@ -409,7 +409,8 @@
if ( !error )
{
af_latin_metrics_init_widths( metrics, face );
/* For now, compute the standard width and height from the `o'. */
af_latin_metrics_init_widths( metrics, face, 'o' );
af_latin_metrics_init_blues( metrics, face );
}
@ -746,6 +747,7 @@
segment->last = point;
segment->contour = contour;
segment->score = 32000;
segment->len = 0;
segment->link = NULL;
on_edge = 1;
@ -812,6 +814,7 @@
segment->last = min_point;
segment->pos = min_pos;
segment->score = 32000;
segment->len = 0;
segment->link = NULL;
segment = NULL;
@ -831,6 +834,7 @@
segment->last = max_point;
segment->pos = max_pos;
segment->score = 32000;
segment->len = 0;
segment->link = NULL;
segment = NULL;
@ -851,9 +855,13 @@
AF_Segment segments = axis->segments;
AF_Segment segment_limit = segments + axis->num_segments;
AF_Direction major_dir = axis->major_dir;
FT_UShort len_threshold;
AF_Segment seg1, seg2;
len_threshold = ( (AF_LatinMetrics)hints->metrics )->units_per_em;
len_threshold = ( len_threshold * 8 ) / 2048;
/* now compare each segment to the others */
for ( seg1 = segments; seg1 < segment_limit; seg1++ )
{
@ -886,7 +894,7 @@
max = seg2->max_coord;
len = max - min;
if ( len >= 8 )
if ( len >= len_threshold )
{
score = dist + 3000 / len;

6
src/autofit/aflatin.h
View File

@ -4,7 +4,7 @@
/* */
/* Auto-fitter hinting routines for latin script (specification). */
/* */
/* Copyright 2003, 2004, 2005 by */
/* Copyright 2003, 2004, 2005, 2006 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -126,6 +126,10 @@ FT_BEGIN_HEADER
af_latin_metrics_scale( AF_LatinMetrics metrics,
AF_Scaler scaler );
FT_LOCAL( void )
af_latin_metrics_init_widths( AF_LatinMetrics metrics,
FT_Face face,
FT_ULong charcode );
/*************************************************************************/

2
src/autofit/afloader.c
View File

@ -193,7 +193,7 @@
axis->num_edges - 1; /* rightmost edge */
if ( axis->num_edges > 1 )
if ( axis->num_edges > 1 && AF_HINTS_DO_ADVANCE( hints ) )
{
old_advance = loader->pp2.x;
old_rsb = old_advance - edge2->opos;

1
src/autofit/aftypes.h
View File

@ -259,6 +259,7 @@ FT_BEGIN_HEADER
{
AF_SCRIPT_NONE = 0,
AF_SCRIPT_LATIN = 1,
AF_SCRIPT_CJK = 2,
/* add new scripts here. Don't forget to update the list in */
/* `afglobal.c'. */

1
src/autofit/autofit.c
View File

@ -23,6 +23,7 @@
#include "afhints.c"
#include "afdummy.c"
#include "aflatin.c"
#include "afcjk.c"
#include "afloader.c"
#include "afmodule.c"

1
src/autofit/rules.mk
View File

@ -30,6 +30,7 @@ AUTOF_DRV_SRC := $(AUTOF_DIR)/afangles.c \
$(AUTOF_DIR)/afglobal.c \
$(AUTOF_DIR)/afhints.c \
$(AUTOF_DIR)/aflatin.c \
$(AUTOF_DIR)/afcjk.c \
$(AUTOF_DIR)/afloader.c \
$(AUTOF_DIR)/afmodule.c \
$(AUTOF_DIR)/afwarp.c