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autohint: 

Formatting.

  Replacing many enums with #defines since we do arithmetics (especially
  ORing which would produce undefined enum values). The ideal thing instead
  of #defines is `const int' as provided in C++...

  Adding header files to rules.mk
This commit is contained in:
Werner Lemberg 2000-07-26 14:11:15 +00:00
parent d082cd6801
commit c3dd151b0f
14 changed files with 1546 additions and 1237 deletions
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4
src/autohint/ahglobal.c
View File

@ -102,14 +102,14 @@
AH_LOG(( "blue zones computation\n" ));
AH_LOG(( "------------------------------------------------\n" ));
for ( blue = (AH_Blue)0; blue < ah_blue_max; blue++ )
for ( blue = ah_blue_capital_top; blue < ah_blue_max; blue++ )
{
const char* p = blue_chars[blue];
const char* limit = p + MAX_TEST_CHARACTERS;
FT_Pos *blue_ref, *blue_shoot;
AH_LOG(( "blue %3d: ", (int)blue ));
AH_LOG(( "blue %3d: ", blue ));
num_flats = 0;
num_rounds = 0;

74
src/autohint/ahglyph.c
View File

@ -11,7 +11,7 @@
/* This file is part of the Catharon Typography Project and shall only */
/* be used, modified, and distributed under the terms of the Catharon */
/* Open Source License that should come with this file under the name */
/* "CatharonLicense.txt". By continuing to use, modify, or distribute */
/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
@ -1150,7 +1150,7 @@
if ( best_dist > 64 / 4 )
best_dist = 64 / 4;
for ( blue = (AH_Blue)0; blue < ah_blue_max; blue++ )
for ( blue = ah_blue_capital_top; blue < ah_blue_max; blue++ )
{
/* if it is a top zone, check for right edges -- if it is a bottom */
/* zone, check for left edges */
@ -1213,18 +1213,16 @@
}
/************************************************************************
*
* <Function>
* ah_outline_scale_blue_edges
*
* <Description>
* This functions must be called before hinting in order to re-adjust
* the content of the detected edges (basically change the "blue edge"
* pointer from 'design units' to 'scaled ones'
*
************************************************************************/
/*************************************************************************/
/* */
/* <Function> */
/* ah_outline_scale_blue_edges */
/* */
/* <Description> */
/* This functions must be called before hinting in order to re-adjust */
/* the contents of the detected edges (basically change the `blue */
/* edge' pointer from `design units' to `scaled ones'). */
/* */
LOCAL_FUNC
void ah_outline_scale_blue_edges( AH_Outline* outline,
AH_Face_Globals* globals )
@ -1233,20 +1231,19 @@
AH_Edge* limit = edge + outline->num_hedges;
FT_Int delta;
delta = globals->scaled.blue_refs - globals->design.blue_refs;
for ( ; edge < limit; edge++ )
{
if (edge->blue_edge)
if ( edge->blue_edge )
edge->blue_edge += delta;
}
}
#ifdef AH_DEBUG_GLYPH
extern
void ah_dump_edges( AH_Outline* outline )
{
AH_Edge* edges;
@ -1254,38 +1251,49 @@
AH_Segment* segments;
FT_Int dimension;
edges = outline->horz_edges;
limit = edges + outline->num_hedges;
segments = outline->horz_segments;
for ( dimension = 1; dimension >= 0; dimension-- )
{
AH_Edge* edge;
printf ( "Table of %s edges:\n", !dimension ? "vertical" : "horizontal" );
printf ( " [ index | pos | dir | link | serif | blue | opos | pos ]\n" );
printf ( "Table of %s edges:\n",
!dimension ? "vertical" : "horizontal" );
printf ( " [ index | pos | dir | link |"
" serif | blue | opos | pos ]\n" );
for ( edge = edges; edge < limit; edge++ )
{
printf ( " [ %5d | %4d | %5s | %4d | %5d | %c | %5.2f | %5.2f ]\n",
edge - edges,
(int)edge->fpos,
edge->dir == ah_dir_up ? "up" :
(edge->dir == ah_dir_down ? "down" :
(edge->dir == ah_dir_left ? "left" :
(edge->dir == ah_dir_right ? "right" : "none")
)
),
edge->link ? (edge->link-edges) : -1,
edge->serif ? (edge->serif-edges) : -1,
edge->dir == ah_dir_up
? "up"
: ( edge->dir == ah_dir_down
? "down"
: ( edge->dir == ah_dir_left
? "left"
: ( edge->dir == ah_dir_right
? "right"
: "none" ) ) ),
edge->link ? ( edge->link - edges ) : -1,
edge->serif ? ( edge->serif - edges ) : -1,
edge->blue_edge ? 'y' : 'n',
edge->opos/64.0,
edge->pos/64.0 );
edge->opos / 64.0,
edge->pos / 64.0 );
}
edges = outline->vert_edges;
limit = edges + outline->num_vedges;
segments = outline->vert_segments;
}
}
#endif
#endif /* AH_DEBUG_GLYPH */
/* END */

545
src/autohint/ahhint.c
View File

File diff suppressed because it is too large Load Diff

45
src/autohint/ahhint.h
View File

@ -2,64 +2,71 @@
/* */
/* ahhint.h */
/* */
/* Glyph hinter declarations */
/* Glyph hinter (declaration). */
/* */
/* Copyright 2000: Catharon Productions Inc. */
/* Copyright 2000 Catharon Productions Inc. */
/* Author: David Turner */
/* */
/* This file is part of the Catharon Typography Project and shall only */
/* be used, modified, and distributed under the terms of the Catharon */
/* Open Source License that should come with this file under the name */
/* "CatharonLicense.txt". By continuing to use, modify, or distribute */
/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/* Note that this license is compatible with the FreeType license */
/* Note that this license is compatible with the FreeType license. */
/* */
/***************************************************************************/
#ifndef AGHINT_H
#define AGHINT_H
#ifndef AHHINT_H
#define AHHINT_H
#ifdef FT_FLAT_COMPILE
#include "ahglobal.h"
#else
#include <autohint/ahglobal.h>
#endif
#define AH_HINT_DEFAULT 0
#define AH_HINT_NO_ALIGNMENT 1
#define AH_HINT_NO_HORZ_EDGES 0x20000
#define AH_HINT_NO_VERT_EDGES 0x40000
#define AH_HINT_NO_HORZ_EDGES 0x20000L
#define AH_HINT_NO_VERT_EDGES 0x40000L
/* create a new empty hinter object */
extern
FT_Error ah_hinter_new( FT_Library library, AH_Hinter* *ahinter );
FT_Error ah_hinter_new( FT_Library library,
AH_Hinter** ahinter );
/* Load a hinted glyph in the hinter */
extern
FT_Error ah_hinter_load_glyph( AH_Hinter* hinter,
FT_GlyphSlot slot,
FT_Size size,
FT_UInt glyph_index,
FT_Int load_flags );
/* finalise a hinter object */
extern
/* finalize a hinter object */
void ah_hinter_done( AH_Hinter* hinter );
LOCAL_DEF
void ah_hinter_done_face_globals( AH_Face_Globals* globals );
extern
void ah_hinter_get_global_hints( AH_Hinter* hinter,
FT_Face face,
void* *global_hints,
long *global_len );
void** global_hints,
long* global_len );
extern
void ah_hinter_done_global_hints( AH_Hinter* hinter,
void* global_hints );
#endif /* AGHINT_H */
#endif /* AHHINT_H */
/* END */

83
src/autohint/ahloader.h
View File

@ -2,30 +2,39 @@
/* */
/* ahloader.h */
/* */
/* Glyph loader implementation for the auto-hinting module */
/* This defines the AG_GlyphLoader type in two different ways: */
/* Glyph loader for the auto-hinting module (declaration only). */
/* */
/* - when the module is compiled within FreeType 2, the type */
/* is simply a typedef to FT_GlyphLoader */
/* */
/* - when the module is compiled as a standalone object, */
/* AG_GlyphLoader has its own implementation.. */
/* */
/* Copyright 2000: Catharon Productions Inc. */
/* Copyright 2000 Catharon Productions Inc. */
/* Author: David Turner */
/* */
/* This file is part of the Catharon Typography Project and shall only */
/* be used, modified, and distributed under the terms of the Catharon */
/* Open Source License that should come with this file under the name */
/* "CatharonLicense.txt". By continuing to use, modify, or distribute */
/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/* Note that this license is compatible with the FreeType license */
/* Note that this license is compatible with the FreeType license. */
/* */
/***************************************************************************/
#ifndef AGLOADER_H
#define AGLOADER_H
/*************************************************************************/
/* */
/* This defines the AH_GlyphLoader type in two different ways: */
/* */
/* - If the module is compiled within FreeType 2, the type is simply a */
/* typedef to FT_GlyphLoader. */
/* */
/* - If the module is compiled as a standalone object, AH_GlyphLoader */
/* has its own implementation. */
/* */
/*************************************************************************/
#ifndef AHLOADER_H
#define AHLOADER_H
#ifdef _STANDALONE_
@ -34,7 +43,7 @@
FT_Outline outline; /* outline */
FT_UInt num_subglyphs; /* number of subglyphs */
FT_SubGlyph* subglyphs; /* subglyphs */
FT_Vector* extra_points; /* extra points table.. */
FT_Vector* extra_points; /* extra points table */
} AH_GlyphLoad;
@ -50,38 +59,47 @@
AH_GlyphLoad base;
AH_GlyphLoad current;
void* other; /* for possible future extension ? */
void* other; /* for possible future extensions */
};
LOCAL_DEF FT_Error AH_GlyphLoader_New( FT_Memory memory,
AH_GlyphLoader* *aloader );
LOCAL_DEF
FT_Error AH_GlyphLoader_New( FT_Memory memory,
AH_GlyphLoader** aloader );
LOCAL_DEF FT_Error AH_GlyphLoader_Create_Extra( AH_GlyphLoader* loader );
LOCAL_DEF
FT_Error AH_GlyphLoader_Create_Extra( AH_GlyphLoader* loader );
LOCAL_DEF void AH_GlyphLoader_Done( AH_GlyphLoader* loader );
LOCAL_DEF
void AH_GlyphLoader_Done( AH_GlyphLoader* loader );
LOCAL_DEF void AH_GlyphLoader_Reset( AH_GlyphLoader* loader );
LOCAL_DEF
void AH_GlyphLoader_Reset( AH_GlyphLoader* loader );
LOCAL_DEF void AH_GlyphLoader_Rewind( AH_GlyphLoader* loader );
LOCAL_DEF
void AH_GlyphLoader_Rewind( AH_GlyphLoader* loader );
LOCAL_DEF FT_Error AH_GlyphLoader_Check_Points( AH_GlyphLoader* loader,
LOCAL_DEF
FT_Error AH_GlyphLoader_Check_Points( AH_GlyphLoader* loader,
FT_UInt n_points,
FT_UInt n_contours );
LOCAL_DEF FT_Error AH_GlyphLoader_Check_Subglyphs( AH_GlyphLoader* loader,
LOCAL_DEF
FT_Error AH_GlyphLoader_Check_Subglyphs( AH_GlyphLoader* loader,
FT_UInt n_subs );
LOCAL_DEF void AH_GlyphLoader_Prepare( AH_GlyphLoader* loader );
LOCAL_DEF
void AH_GlyphLoader_Prepare( AH_GlyphLoader* loader );
LOCAL_DEF
void AH_GlyphLoader_Add( AH_GlyphLoader* loader );
LOCAL_DEF void AH_GlyphLoader_Add( AH_GlyphLoader* loader );
LOCAL_DEF FT_Error AH_GlyphLoader_Copy_Points( AH_GlyphLoader* target,
LOCAL_DEF
FT_Error AH_GlyphLoader_Copy_Points( AH_GlyphLoader* target,
FT_GlyphLoader* source );
#else
#else /* _STANDALONE */
#include <freetype/internal/ftobjs.h>
#define AH_Load FT_GlyphLoad
@ -98,6 +116,9 @@
#define ah_loader_add FT_GlyphLoader_Add
#define ah_loader_copy_points FT_GlyphLoader_Copy_Points
#endif
#endif /* _STANDALONE_ */
#endif /* AGLOADER_H */
#endif /* AHLOADER_H */
/* END */

42
src/autohint/ahmodule.c
View File

@ -2,27 +2,34 @@
/* */
/* ahmodule.c */
/* */
/* Auto-hinting module implementation */
/* Auto-hinting module implementation (declaration). */
/* */
/* Copyright 2000: Catharon Productions Inc. */
/* Copyright 2000 Catharon Productions Inc. */
/* Author: David Turner */
/* */
/* This file is part of the Catharon Typography Project and shall only */
/* be used, modified, and distributed under the terms of the Catharon */
/* Open Source License that should come with this file under the name */
/* "CatharonLicense.txt". By continuing to use, modify, or distribute */
/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/* Note that this license is compatible with the FreeType license */
/* Note that this license is compatible with the FreeType license. */
/* */
/***************************************************************************/
#include <freetype/ftmodule.h>
#ifdef FT_FLAT_COMPILE
#include "ahhint.h"
#else
#include <autohint/ahhint.h>
#endif
@ -40,12 +47,14 @@
return ah_hinter_new( module->root.library, &module->hinter );
}
static
void ft_autohinter_done( FT_AutoHinter module )
{
ah_hinter_done( module->hinter );
}
static
FT_Error ft_autohinter_load( FT_AutoHinter module,
FT_GlyphSlot slot,
@ -57,20 +66,23 @@
slot, size, glyph_index, load_flags );
}
static
void ft_autohinter_reset( FT_AutoHinter module,
FT_Face face )
{
UNUSED(module);
if (face->autohint.data)
ah_hinter_done_face_globals( face->autohint.data );
UNUSED( module );
if ( face->autohint.data )
ah_hinter_done_face_globals( (AH_Face_Globals*)(face->autohint.data) );
}
static
void ft_autohinter_get_globals( FT_AutoHinter module,
FT_Face face,
void* *global_hints,
long *global_len )
void** global_hints,
long* global_len )
{
ah_hinter_get_global_hints( module->hinter, face,
global_hints, global_len );
@ -94,18 +106,22 @@
ft_autohinter_done_globals
};
const FT_Module_Class autohint_module_class =
{
ft_module_hinter,
sizeof( FT_AutoHinterRec ),
sizeof ( FT_AutoHinterRec ),
"autohinter",
0x10000, /* version 1.0 of the autohinter */
0x20000, /* requires FreeType 2.0 or above */
0x10000L, /* version 1.0 of the autohinter */
0x20000L, /* requires FreeType 2.0 or above */
(const void*)&autohinter_interface,
(FT_Module_Constructor) ft_autohinter_init,
(FT_Module_Constructor)ft_autohinter_init,
(FT_Module_Destructor) ft_autohinter_done,
(FT_Module_Requester) 0
};
/* END */

15
src/autohint/ahmodule.h
View File

@ -2,26 +2,31 @@
/* */
/* ahmodule.h */
/* */
/* Auto-hinting module declaration */
/* Auto-hinting module (declaration). */
/* */
/* Copyright 2000: Catharon Productions Inc. */
/* Copyright 2000 Catharon Productions Inc. */
/* Author: David Turner */
/* */
/* This file is part of the Catharon Typography Project and shall only */
/* be used, modified, and distributed under the terms of the Catharon */
/* Open Source License that should come with this file under the name */
/* "CatharonLicense.txt". By continuing to use, modify, or distribute */
/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/* Note that this license is compatible with the FreeType license */
/* Note that this license is compatible with the FreeType license. */
/* */
/***************************************************************************/
#ifndef AHMODULE_H
#define AHMODULE_H
#include <freetype/ftmodule.h>
FT_EXPORT_VAR(const FT_Module_Class) autohint_module_class;
FT_EXPORT_VAR( const FT_Module_Class ) autohint_module_class;
#endif /* AHMODULE_H */
/* END */

413
src/autohint/ahoptim.c
View File

@ -1,106 +1,131 @@
/***************************************************************************/
/* */
/* FreeType Auto-Gridder Outline Optimisation */
/* ahoptim.c */
/* */
/* This module is in charge of optimising the outlines produced by the */
/* auto-hinter in direct mode. This is required at small pixel sizes in */
/* order to ensure coherent spacing, among other things.. */
/* FreeType auto hinting outline optimization (body). */
/* */
/* The technique used in this module is a simplified simulated annealing. */
/* */
/* */
/* Copyright 2000: Catharon Productions Inc. */
/* Copyright 2000 Catharon Productions Inc. */
/* Author: David Turner */
/* */
/* This file is part of the Catharon Typography Project and shall only */
/* be used, modified, and distributed under the terms of the Catharon */
/* Open Source License that should come with this file under the name */
/* "CatharonLicense.txt". By continuing to use, modify, or distribute */
/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/* Note that this license is compatible with the FreeType license */
/* Note that this license is compatible with the FreeType license. */
/* */
/***************************************************************************/
#include <freetype/internal/ftobjs.h> /* for ALLOC_ARRAY and FREE */
/*************************************************************************/
/* */
/* This module is in charge of optimising the outlines produced by the */
/* auto-hinter in direct mode. This is required at small pixel sizes in */
/* order to ensure coherent spacing, among other things.. */
/* */
/* The technique used in this module is a simplified simulated */
/* annealing. */
/* */
/*************************************************************************/
#include <freetype/internal/ftobjs.h> /* for ALLOC_ARRAY() and FREE() */
#ifdef FT_FLAT_COMPILE
#include "ahoptim.h"
#else
#include <autohint/ahoptim.h>
#endif
/* define this macro to use brute force optimisation, this is slow, but */
/* a good way to perfect the distortion function "by hand" through */
/* tweaking.. */
#define BRUTE_FORCE
#define xxxDEBUG_OPTIM
/* define this macro to use brute force optimisation -- this is slow, */
/* but a good way to perfect the distortion function `by hand' through */
/* tweaking */
#define AH_BRUTE_FORCE
#define xxxAH_DEBUG_OPTIM
#undef LOG
#ifdef DEBUG_OPTIM
#define LOG(x) optim_log##x
#else
#define LOG(x)
#endif
#ifdef AH_DEBUG_OPTIM
#define LOG( x ) optim_log##x
#else
#define LOG( x )
#endif /* AH_DEBUG_OPTIM */
#ifdef AH_DEBUG_OPTIM
#ifdef DEBUG_OPTIM
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#define FLOAT(x) ((float)((x)/64.0))
#define FLOAT( x ) ( (float)( (x) / 64.0 ) )
static
void optim_log( const char* fmt, ... )
{
static
void optim_log( const char* fmt, ... )
{
va_list ap;
va_start( ap, fmt );
vprintf( fmt, ap );
va_end( ap );
}
#endif
}
#ifdef DEBUG_OPTIM
static
void AH_Dump_Stems( AH_Optimizer* optimizer )
{
int n;
AH_Stem* stem;
stem = optimizer->stems;
for ( n = 0; n < optimizer->num_stems; n++, stem++ )
{
LOG(( " %c%2d [%.1f:%.1f]={%.1f:%.1f}=<%1.f..%1.f> force=%.1f speed=%.1f\n",
LOG(( " %c%2d [%.1f:%.1f]={%.1f:%.1f}="
"<%1.f..%1.f> force=%.1f speed=%.1f\n",
optimizer->vertical ? 'V' : 'H', n,
FLOAT(stem->edge1->opos), FLOAT(stem->edge2->opos),
FLOAT(stem->edge1->pos), FLOAT(stem->edge2->pos),
FLOAT(stem->min_pos), FLOAT(stem->max_pos),
FLOAT(stem->force), FLOAT(stem->velocity) ));
FLOAT( stem->edge1->opos ), FLOAT( stem->edge2->opos ),
FLOAT( stem->edge1->pos ), FLOAT( stem->edge2->pos ),
FLOAT( stem->min_pos ), FLOAT( stem->max_pos ),
FLOAT( stem->force ), FLOAT( stem->velocity ) ));
}
}
static
void AH_Dump_Stems2( AH_Optimizer* optimizer )
{
int n;
AH_Stem* stem;
stem = optimizer->stems;
for ( n = 0; n < optimizer->num_stems; n++, stem++ )
{
LOG(( " %c%2d [%.1f]=<%1.f..%1.f> force=%.1f speed=%.1f\n",
optimizer->vertical ? 'V' : 'H', n,
FLOAT(stem->pos),
FLOAT(stem->min_pos), FLOAT(stem->max_pos),
FLOAT(stem->force), FLOAT(stem->velocity) ));
FLOAT( stem->pos ),
FLOAT( stem->min_pos ), FLOAT( stem->max_pos ),
FLOAT( stem->force ), FLOAT( stem->velocity ) ));
}
}
static
void AH_Dump_Springs( AH_Optimizer* optimizer )
{
@ -108,20 +133,25 @@ void optim_log( const char* fmt, ... )
AH_Spring* spring;
AH_Stem* stems;
spring = optimizer->springs;
stems = optimizer->stems;
LOG(( "%cSprings ", optimizer->vertical ? 'V' : 'H' ));
for ( n = 0; n < optimizer->num_springs; n++, spring++ )
{
LOG(( " [%d-%d:%.1f:%1.f:%.1f]", spring->stem1 - stems, spring->stem2 - stems,
FLOAT(spring->owidth),
FLOAT(spring->stem2->pos-(spring->stem1->pos+spring->stem1->width)),
FLOAT(spring->tension) ));
LOG(( " [%d-%d:%.1f:%1.f:%.1f]",
spring->stem1 - stems, spring->stem2 - stems,
FLOAT( spring->owidth ),
FLOAT( spring->stem2->pos -
( spring->stem1->pos + spring->stem1->width ) ),
FLOAT( spring->tension ) ));
}
LOG(( "\n" ));
}
#endif
#endif /* AH_DEBUG_OPTIM */
/*************************************************************************/
@ -130,20 +160,24 @@ void optim_log( const char* fmt, ... )
/**** ****/
/**** COMPUTE STEMS AND SPRINGS IN AN OUTLINE ****/
/**** ****/
/**** ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
static
int valid_stem_segments( AH_Segment* seg1, AH_Segment* seg2 )
int valid_stem_segments( AH_Segment* seg1,
AH_Segment* seg2 )
{
return seg1->serif == 0 && seg2 && seg2->link == seg1 && seg1->pos < seg2->pos &&
return seg1->serif == 0 &&
seg2 &&
seg2->link == seg1 &&
seg1->pos < seg2->pos &&
seg1->min_coord <= seg2->max_coord &&
seg2->min_coord <= seg1->max_coord;
}
/* compute all stems in an outline */
static
int optim_compute_stems( AH_Optimizer* optimizer )
@ -158,6 +192,7 @@ void optim_log( const char* fmt, ... )
AH_Stem** p_stems;
FT_Int* p_num_stems;
edges = outline->horz_edges;
edge_limit = edges + outline->num_hedges;
scale = outline->y_scale;
@ -171,25 +206,29 @@ void optim_log( const char* fmt, ... )
FT_Int num_stems = 0;
AH_Edge* edge;
/* first of all, count the number of stems in this direction */
for ( edge = edges; edge < edge_limit; edge++ )
{
AH_Segment* seg = edge->first;
do
{
if (valid_stem_segments( seg, seg->link ))
if (valid_stem_segments( seg, seg->link ) )
num_stems++;
seg = seg->edge_next;
} while (seg != edge->first);
} while ( seg != edge->first );
}
/* now allocate the stems and build their table */
if (num_stems > 0)
if ( num_stems > 0 )
{
AH_Stem* stem;
if ( ALLOC_ARRAY( stems, num_stems, AH_Stem ) )
goto Exit;
@ -198,14 +237,17 @@ void optim_log( const char* fmt, ... )
{
AH_Segment* seg = edge->first;
AH_Segment* seg2;
do
{
seg2 = seg->link;
if (valid_stem_segments(seg,seg2))
if ( valid_stem_segments( seg, seg2 ) )
{
AH_Edge* edge1 = seg->edge;
AH_Edge* edge2 = seg2->edge;
stem->edge1 = edge1;
stem->edge2 = edge2;
stem->opos = edge1->opos;
@ -218,49 +260,51 @@ void optim_log( const char* fmt, ... )
FT_Pos min_coord = seg->min_coord;
FT_Pos max_coord = seg->max_coord;
if (seg2->min_coord > min_coord)
if ( seg2->min_coord > min_coord )
min_coord = seg2->min_coord;
if (seg2->max_coord < max_coord)
if ( seg2->max_coord < max_coord )
max_coord = seg2->max_coord;
stem->min_coord = min_coord;
stem->max_coord = max_coord;
}
/* compute minimum and maximum positions for stem */
/* compute minimum and maximum positions for stem -- */
/* note that the left-most/bottom-most stem has always */
/* a fixed position.. */
if (stem == stems || edge1->blue_edge || edge2->blue_edge)
/* a fixed position */
if ( stem == stems || edge1->blue_edge || edge2->blue_edge )
{
/* this stem cannot move, it is snapped to a blue edge */
/* this stem cannot move; it is snapped to a blue edge */
stem->min_pos = stem->pos;
stem->max_pos = stem->pos;
}
else
{
/* this edge can move, compute its min and max positions */
/* this edge can move; compute its min and max positions */
FT_Pos pos1 = stem->opos;
FT_Pos pos2 = pos1 + stem->owidth - stem->width;
FT_Pos min1 = (pos1 & -64);
FT_Pos min2 = (pos2 & -64);
FT_Pos min1 = pos1 & -64;
FT_Pos min2 = pos2 & -64;
stem->min_pos = min1;
stem->max_pos = min1+64;
if (min2 < min1)
stem->max_pos = min1 + 64;
if ( min2 < min1 )
stem->min_pos = min2;
else
stem->max_pos = min2+64;
stem->max_pos = min2 + 64;
/* XXX : just to see what it does */
/* XXX: just to see what it does */
stem->max_pos += 64;
/* just for the case where direct hinting did some incredible */
/* things (e.g. blue edge shifts..) */
if (stem->min_pos > stem->pos)
/* just for the case where direct hinting did some */
/* incredible things (e.g. blue edge shifts) */
if ( stem->min_pos > stem->pos )
stem->min_pos = stem->pos;
if (stem->max_pos < stem->pos)
if ( stem->max_pos < stem->pos )
stem->max_pos = stem->pos;
}
@ -270,8 +314,8 @@ void optim_log( const char* fmt, ... )
stem++;
}
seg = seg->edge_next;
}
while (seg != edge->first);
} while ( seg != edge->first );
}
}
@ -285,17 +329,21 @@ void optim_log( const char* fmt, ... )
p_stems = &optimizer->vert_stems;
p_num_stems = &optimizer->num_vstems;
}
Exit:
#ifdef DEBUG_OPTIM
AH_Dump_Stems(optimizer);
#endif
#ifdef AH_DEBUG_OPTIM
AH_Dump_Stems( optimizer );
#endif
return error;
}
/* returns the spring area between two stems, 0 if none */
static
FT_Pos stem_spring_area( AH_Stem* stem1, AH_Stem* stem2 )
FT_Pos stem_spring_area( AH_Stem* stem1,
AH_Stem* stem2 )
{
FT_Pos area1 = stem1->max_coord - stem1->min_coord;
FT_Pos area2 = stem2->max_coord - stem2->min_coord;
@ -303,18 +351,19 @@ void optim_log( const char* fmt, ... )
FT_Pos max = stem1->max_coord;
FT_Pos area;
/* order stems */
if (stem2->opos <= stem1->opos + stem1->owidth)
if ( stem2->opos <= stem1->opos + stem1->owidth )
return 0;
if (min < stem2->min_coord)
if ( min < stem2->min_coord )
min = stem2->min_coord;
if (max < stem2->max_coord)
if ( max < stem2->max_coord )
max = stem2->max_coord;
area = (max-min);
if ( 2*area < area1 && 2*area < area2 )
area = ( max-min );
if ( 2 * area < area1 && 2 * area < area2 )
area = 0;
return area;
@ -326,7 +375,7 @@ void optim_log( const char* fmt, ... )
int optim_compute_springs( AH_Optimizer* optimizer )
{
/* basically, a spring exists between two stems if most of their */
/* surface is aligned.. */
/* surface is aligned */
FT_Memory memory = optimizer->memory;
AH_Stem* stems;
@ -338,6 +387,7 @@ void optim_log( const char* fmt, ... )
FT_Int* p_num_springs;
AH_Spring** p_springs;
stems = optimizer->horz_stems;
stem_limit = stems + optimizer->num_hstems;
@ -349,20 +399,24 @@ void optim_log( const char* fmt, ... )
FT_Int num_springs = 0;
AH_Spring* springs = 0;
/* first of all, count stem springs */
for ( stem = stems; stem+1 < stem_limit; stem++ )
for ( stem = stems; stem + 1 < stem_limit; stem++ )
{
AH_Stem* stem2;
for ( stem2 = stem+1; stem2 < stem_limit; stem2++ )
if (stem_spring_area(stem,stem2))
if ( stem_spring_area( stem, stem2 ) )
num_springs++;
}
/* then allocate and build the springs table */
if (num_springs > 0)
if ( num_springs > 0 )
{
AH_Spring* spring;
/* allocate table of springs */
if ( ALLOC_ARRAY( springs, num_springs, AH_Spring ) )
goto Exit;
@ -374,15 +428,16 @@ void optim_log( const char* fmt, ... )
AH_Stem* stem2;
FT_Pos area;
for ( stem2 = stem+1; stem2 < stem_limit; stem2++ )
for ( stem2 = stem + 1; stem2 < stem_limit; stem2++ )
{
area = stem_spring_area(stem,stem2);
if (area)
area = stem_spring_area( stem, stem2 );
if ( area )
{
/* add a new spring here */
spring->stem1 = stem;
spring->stem2 = stem2;
spring->owidth = stem2->opos - (stem->opos + stem->owidth);
spring->owidth = stem2->opos - ( stem->opos + stem->owidth );
spring->tension = 0;
spring++;
@ -401,31 +456,35 @@ void optim_log( const char* fmt, ... )
}
Exit:
#ifdef DEBUG_OPTIM
AH_Dump_Springs(optimizer);
#endif
#ifdef AH_DEBUG_OPTIM
AH_Dump_Springs( optimizer );
#endif
return error;
}
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** OPTIMISE THROUGH MY STRANGE SIMULATED ANNEALING ALGO ;-) ****/
/**** ****/
/**** ****/
/**** OPTIMIZE THROUGH MY STRANGE SIMULATED ANNEALING ALGO ;-) ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
#ifndef BRUTE_FORCE
#ifndef AH_BRUTE_FORCE
/* compute all spring tensions */
static
void optim_compute_tensions( AH_Optimizer* optimizer )
{
AH_Spring* spring = optimizer->springs;
AH_Spring* limit = spring + optimizer->num_springs;
for ( ; spring < limit; spring++ )
{
AH_Stem* stem1 = spring->stem1;
@ -436,47 +495,47 @@ void optim_log( const char* fmt, ... )
FT_Pos tension;
FT_Pos sign;
/* compute the tension, it simply is -K*(new_width-old_width) */
width = stem2->pos - (stem1->pos + stem1->width);
/* compute the tension; it simply is -K*(new_width-old_width) */
width = stem2->pos - ( stem1->pos + stem1->width );
tension = width - spring->owidth;
sign = 1;
if (tension < 0)
if ( tension < 0 )
{
sign = -1;
tension = -tension;
}
if (width <= 0)
if ( width <= 0 )
tension = 32000;
else
tension = (tension << 10)/width;
tension = ( tension << 10 ) / width;
tension = -sign*FT_MulFix( tension, optimizer->tension_scale );
tension = -sign * FT_MulFix( tension, optimizer->tension_scale );
spring->tension = tension;
/* now, distribute tension among the englobing stems, if they */
/* are able to move.. */
/* are able to move */
status = 0;
if (stem1->pos <= stem1->min_pos)
if ( stem1->pos <= stem1->min_pos )
status |= 1;
if (stem2->pos >= stem2->max_pos)
if ( stem2->pos >= stem2->max_pos )
status |= 2;
if (!status)
if ( !status )
tension /= 2;
if ((status & 1)== 0)
if ( ( status & 1 ) == 0 )
stem1->force -= tension;
if ((status & 2)== 0)
if ( ( status & 2 ) == 0 )
stem2->force += tension;
}
}
/* compute all stem movements - returns 0 if nothing moved */
/* compute all stem movements -- returns 0 if nothing moved */
static
int optim_compute_stem_movements( AH_Optimizer* optimizer )
{
@ -485,62 +544,66 @@ void optim_log( const char* fmt, ... )
AH_Stem* stem = stems;
int moved = 0;
/* set initial forces to velocity */
for ( stem = stems; stem < limit; stem++ )
{
stem->force = stem->velocity;
stem->velocity /= 2; /* XXXX: Heuristics */
stem->velocity /= 2; /* XXX: Heuristics */
}
/* compute the sum of forces applied on each stem */
optim_compute_tensions( optimizer );
#ifdef DEBUG_OPTIM
#ifdef AH_DEBUG_OPTIM
AH_Dump_Springs( optimizer );
AH_Dump_Stems2( optimizer );
#endif
#endif
/* now, see if something can move ? */
/* now, see whether something can move */
for ( stem = stems; stem < limit; stem++ )
{
if (stem->force > optimizer->tension_threshold)
if ( stem->force > optimizer->tension_threshold )
{
/* there is enough tension to move the stem to the right */
if (stem->pos < stem->max_pos)
if ( stem->pos < stem->max_pos )
{
stem->pos += 64;
stem->velocity = stem->force/2;
stem->velocity = stem->force / 2;
moved = 1;
}
else
stem->velocity = 0;
}
else if (stem->force < optimizer->tension_threshold)
else if ( stem->force < optimizer->tension_threshold )
{
/* there is enough tension to move the stem to the left */
if (stem->pos > stem->min_pos)
if ( stem->pos > stem->min_pos )
{
stem->pos -= 64;
stem->velocity = stem->force/2;
stem->velocity = stem->force / 2;
moved = 1;
}
else
stem->velocity = 0;
}
}
/* return 0 if nothing moved */
return moved;
}
#endif /* BRUTE_FORCE */
#endif /* AH_BRUTE_FORCE */
/* compute current global distortion from springs */
static
FT_Pos optim_compute_distorsion( AH_Optimizer* optimizer )
FT_Pos optim_compute_distortion( AH_Optimizer* optimizer )
{
AH_Spring* spring = optimizer->springs;
AH_Spring* limit = spring + optimizer->num_springs;
FT_Pos distorsion = 0;
FT_Pos distortion = 0;
for ( ; spring < limit; spring++ )
{
@ -548,32 +611,34 @@ void optim_log( const char* fmt, ... )
AH_Stem* stem2 = spring->stem2;
FT_Pos width;
width = stem2->pos - (stem1->pos + stem1->width);
width = stem2->pos - ( stem1->pos + stem1->width );
width -= spring->owidth;
if (width < 0)
if ( width < 0 )
width = -width;
distorsion += width;
distortion += width;
}
return distorsion;
return distortion;
}
/* record stems configuration in "best of" history */
/* record stems configuration in `best of' history */
static
void optim_record_configuration( AH_Optimizer* optimizer )
{
FT_Pos distorsion;
FT_Pos distortion;
AH_Configuration* configs = optimizer->configs;
AH_Configuration* limit = configs + optimizer->num_configs;
AH_Configuration* config;
distorsion = optim_compute_distorsion( optimizer );
LOG(( "config distorsion = %.1f ", FLOAT(distorsion*64) ));
distortion = optim_compute_distortion( optimizer );
LOG(( "config distortion = %.1f ", FLOAT( distortion * 64 ) ));
/* check that we really need to add this configuration to our */
/* sorted history.. */
if ( limit > configs && limit[-1].distorsion < distorsion )
/* sorted history */
if ( limit > configs && limit[-1].distortion < distortion )
{
LOG(( "ejected\n" ));
return;
@ -583,33 +648,37 @@ void optim_log( const char* fmt, ... )
{
int n;
config = limit;
if (optimizer->num_configs < AH_MAX_CONFIGS)
if ( optimizer->num_configs < AH_MAX_CONFIGS )
optimizer->num_configs++;
else
config--;
config->distorsion = distorsion;
config->distortion = distortion;
for ( n = 0; n < optimizer->num_stems; n++ )
config->positions[n] = optimizer->stems[n].pos;
}
/* move the current configuration towards the front of the list */
/* when necessary, yes this is slow bubble sort ;-) */
while ( config > configs && config[0].distorsion < config[-1].distorsion )
/* when necessary -- yes this is slow bubble sort ;-) */
while ( config > configs && config[0].distortion < config[-1].distortion )
{
AH_Configuration temp;
config--;
temp = config[0];
config[0] = config[1];
config[1] = temp;
}
LOG(( "recorded !!\n" ));
LOG(( "recorded!\n" ));
}
#ifdef BRUTE_FORCE
#ifdef AH_BRUTE_FORCE
/* optimize outline in a single direction */
static
void optim_compute( AH_Optimizer* optimizer )
@ -617,12 +686,12 @@ void optim_log( const char* fmt, ... )
int n;
FT_Bool moved;
AH_Stem* stem = optimizer->stems;
AH_Stem* limit = stem + optimizer->num_stems;
/* empty, exit */
if (stem >= limit)
if ( stem >= limit )
return;
optimizer->num_configs = 0;
@ -634,13 +703,13 @@ void optim_log( const char* fmt, ... )
do
{
/* record current configuration */
optim_record_configuration(optimizer);
optim_record_configuration( optimizer );
/* now change configuration */
moved = 0;
for ( stem = optimizer->stems; stem < limit; stem++ )
{
if (stem->pos < stem->max_pos)
if ( stem->pos < stem->max_pos )
{
stem->pos += 64;
moved = 1;
@ -649,8 +718,7 @@ void optim_log( const char* fmt, ... )
stem->pos = stem->min_pos;
}
}
while (moved);
} while ( moved );
/* now, set the best stem positions */
for ( n = 0; n < optimizer->num_stems; n++ )
@ -658,6 +726,7 @@ void optim_log( const char* fmt, ... )
AH_Stem* stem = optimizer->stems + n;
FT_Pos pos = optimizer->configs[0].positions[n];
stem->edge1->pos = pos;
stem->edge2->pos = pos + stem->width;
@ -665,31 +734,36 @@ void optim_log( const char* fmt, ... )
stem->edge2->flags |= ah_edge_done;
}
}
#else
#else /* AH_BRUTE_FORCE */
/* optimize outline in a single direction */
static
void optim_compute( AH_Optimizer* optimizer )
{
int n, counter, counter2;
optimizer->num_configs = 0;
optimizer->tension_scale = 0x80000L;
optimizer->tension_threshold = 64;
/* record initial configuration threshold */
optim_record_configuration(optimizer);
optim_record_configuration( optimizer );
counter = 0;
for ( counter2 = optimizer->num_stems*8; counter2 >= 0; counter2-- )
{
if (counter == 0)
counter = 2*optimizer->num_stems;
if ( counter == 0 )
counter = 2 * optimizer->num_stems;
if (!optim_compute_stem_movements( optimizer ))
if ( !optim_compute_stem_movements( optimizer ) )
break;
optim_record_configuration(optimizer);
optim_record_configuration( optimizer );
counter--;
if (counter == 0)
if ( counter == 0 )
optimizer->tension_scale /= 2;
}
@ -699,6 +773,7 @@ void optim_log( const char* fmt, ... )
AH_Stem* stem = optimizer->stems + n;
FT_Pos pos = optimizer->configs[0].positions[n];
stem->edge1->pos = pos;
stem->edge2->pos = pos + stem->width;
@ -706,7 +781,9 @@ void optim_log( const char* fmt, ... )
stem->edge2->flags |= ah_edge_done;
}
}
#endif
#endif /* AH_BRUTE_FORCE */
/*************************************************************************/
/*************************************************************************/
@ -714,19 +791,19 @@ void optim_log( const char* fmt, ... )
/**** ****/
/**** HIGH-LEVEL OPTIMIZER API ****/
/**** ****/
/**** ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* releases the optimisation data */
/* releases the optimization data */
void AH_Optimizer_Done( AH_Optimizer* optimizer )
{
if (optimizer)
if ( optimizer )
{
FT_Memory memory = optimizer->memory;
FREE( optimizer->horz_stems );
FREE( optimizer->vert_stems );
FREE( optimizer->horz_springs );
@ -735,6 +812,7 @@ void optim_log( const char* fmt, ... )
}
}
/* loads the outline into the optimizer */
int AH_Optimizer_Init( AH_Optimizer* optimizer,
AH_Outline* outline,
@ -742,7 +820,8 @@ void optim_log( const char* fmt, ... )
{
FT_Error error;
MEM_Set( optimizer, 0, sizeof(*optimizer));
MEM_Set( optimizer, 0, sizeof ( *optimizer ) );
optimizer->outline = outline;
optimizer->memory = memory;
@ -750,22 +829,26 @@ void optim_log( const char* fmt, ... )
/* compute stems and springs */
error = optim_compute_stems ( optimizer ) ||
optim_compute_springs( optimizer );
if (error) goto Fail;
if ( error )
goto Fail;
/* allocate stem positions history and configurations */
{
int n, max_stems;
max_stems = optimizer->num_hstems;
if (max_stems < optimizer->num_vstems)
if ( max_stems < optimizer->num_vstems )
max_stems = optimizer->num_vstems;
if ( ALLOC_ARRAY( optimizer->positions, max_stems*AH_MAX_CONFIGS, FT_Pos ) )
if ( ALLOC_ARRAY( optimizer->positions,
max_stems * AH_MAX_CONFIGS, FT_Pos ) )
goto Fail;
optimizer->num_configs = 0;
for ( n = 0; n < AH_MAX_CONFIGS; n++ )
optimizer->configs[n].positions = optimizer->positions + n*max_stems;
optimizer->configs[n].positions = optimizer->positions +
n * max_stems;
}
return error;
@ -784,9 +867,9 @@ void optim_log( const char* fmt, ... )
optimizer->num_springs = optimizer->num_hsprings;
optimizer->springs = optimizer->horz_springs;
if (optimizer->num_springs > 0)
if ( optimizer->num_springs > 0 )
{
LOG(( "horizontal optimisation ------------------------\n" ));
LOG(( "horizontal optimization ------------------------\n" ));
optim_compute( optimizer );
}
@ -795,14 +878,12 @@ void optim_log( const char* fmt, ... )
optimizer->num_springs = optimizer->num_vsprings;
optimizer->springs = optimizer->vert_springs;
if (optimizer->num_springs)
if ( optimizer->num_springs )
{
LOG(( "vertical optimisation --------------------------\n" ));
LOG(( "vertical optimization --------------------------\n" ));
optim_compute( optimizer );
}
}
/* END */

49
src/autohint/ahoptim.h
View File

@ -1,37 +1,41 @@
/***************************************************************************/
/* */
/* FreeType Auto-Gridder Outline Optimisation */
/* ahoptim.h */
/* */
/* This module is in charge of optimising the outlines produced by the */
/* auto-hinter in direct mode. This is required at small pixel sizes in */
/* order to ensure coherent spacing, among other things.. */
/* FreeType auto hinting outline optimization (declaration). */
/* */
/* The technique used in this module is a simplified simulated annealing. */
/* */
/* Copyright 2000: Catharon Productions Inc. */
/* Copyright 2000 Catharon Productions Inc. */
/* Author: David Turner */
/* */
/* This file is part of the Catharon Typography Project and shall only */
/* be used, modified, and distributed under the terms of the Catharon */
/* Open Source License that should come with this file under the name */
/* "CatharonLicense.txt". By continuing to use, modify, or distribute */
/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/* Note that this license is compatible with the FreeType license */
/* Note that this license is compatible with the FreeType license. */
/* */
/***************************************************************************/
#ifndef AGOPTIM_H
#define AGOPTIM_H
#ifndef AHOPTIM_H
#define AHOPTIM_H
#ifdef FT_FLAT_COMPILE
#include "ahtypes.h"
#else
#include <autohint/ahtypes.h>
#endif
/* the maximal number of stem configurations to record during optimisation */
/* the maximal number of stem configurations to record */
/* during optimization */
#define AH_MAX_CONFIGS 8
@ -69,17 +73,15 @@
/* A configuration records the position of each stem at a given time */
/* as well as the associated distortion.. */
/* as well as the associated distortion */
typedef struct AH_Configuration_
{
FT_Pos* positions;
FT_Long distorsion;
FT_Long distortion;
} AH_Configuration;
typedef struct AH_Optimizer_
{
FT_Memory memory;
@ -97,7 +99,7 @@
AH_Spring* vert_springs;
FT_Int num_configs;
AH_Configuration configs[ AH_MAX_CONFIGS ];
AH_Configuration configs[AH_MAX_CONFIGS];
FT_Pos* positions;
/* during each pass, use these instead */
@ -115,23 +117,20 @@
/* loads the outline into the optimizer */
extern
int AH_Optimizer_Init( AH_Optimizer* optimizer,
AH_Outline* outline,
FT_Memory memory );
/* compute optimal outline */
extern
void AH_Optimizer_Compute( AH_Optimizer* optimizer );
/* releases the optimisation data */
extern
/* release the optimization data */
void AH_Optimizer_Done( AH_Optimizer* optimizer );
#endif /* AGOPTIM_H */
#endif /* AHOPTIM_H */
/* END */

512
src/autohint/ahtypes.h
View File

@ -3,177 +3,212 @@
/* ahtypes.h */
/* */
/* General types and definitions for the auto-hint module */
/* (specification only). */
/* */
/* Copyright 2000: Catharon Productions Inc. */
/* Copyright 2000 Catharon Productions Inc. */
/* Author: David Turner */
/* */
/* This file is part of the Catharon Typography Project and shall only */
/* be used, modified, and distributed under the terms of the Catharon */
/* Open Source License that should come with this file under the name */
/* "CatharonLicense.txt". By continuing to use, modify, or distribute */
/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/* Note that this license is compatible with the FreeType license */
/* Note that this license is compatible with the FreeType license. */
/* */
/***************************************************************************/
#ifndef AGTYPES_H
#define AGTYPES_H
#include <freetype/internal/ftobjs.h> /* for freetype.h + LOCAL_DEF etc.. */
#ifndef AHTYPES_H
#define AHTYPES_H
#include <freetype/internal/ftobjs.h> /* for freetype.h + LOCAL_DEF etc. */
#ifdef FT_FLAT_COMPILE
#include "ahloader.h" /* glyph loader types & declarations */
#include "ahloader.h"
#else
#include <autohint/ahloader.h> /* glyph loader types & declarations */
#include <autohint/ahloader.h>
#endif
#define xxDEBUG_AG
#ifdef DEBUG_AG
#define xxAH_DEBUG
#ifdef AH_DEBUG
#include <stdio.h>
#define AH_LOG(x) printf##x
#define AH_LOG( x ) printf##x
#else
#define AH_LOG(x) /* nothing */
#define AH_LOG( x ) do ; while ( 0 ) /* nothing */
#endif
/***************************************************************************/
/***************************************************************************/
/***************************************************************************/
/**** ****/
/**** COMPILE-TIME BUILD OPTIONS ****/
/**** ****/
/**** Toggle these configuration macros to experiment with ****/
/**** "features" of the auto-hinter.. ****/
/**** ****/
/***************************************************************************/
/***************************************************************************/
/***************************************************************************/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** COMPILE-TIME BUILD OPTIONS ****/
/**** ****/
/**** Toggle these configuration macros to experiment with `features' ****/
/**** of the auto-hinter. ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* if this option is defined, only strong interpolation will be used to */
/* place the points between edges. Otherwise, "smooth" points are detected */
/* and later hinted through weak interpolation to correct some unpleasant */
/* artefacts.. */
/* */
/*************************************************************************/
/* */
/* If this option is defined, only strong interpolation will be used to */
/* place the points between edges. Otherwise, `smooth' points are */
/* detected and later hinted through weak interpolation to correct some */
/* unpleasant artefacts. */
/* */
#undef AH_OPTION_NO_WEAK_INTERPOLATION
/*************************************************************************/
/* */
/* If this option is defined, only weak interpolation will be used to */
/* place the points between edges. Otherwise, `strong' points are */
/* detected and later hinted through strong interpolation to correct */
/* some unpleasant artefacts. */
/* */
#undef AH_OPTION_NO_STRONG_INTERPOLATION
/* undefine this macro if you don't want to hint the metrics */
/* there is no reason to do this, except for experimentation */
/*************************************************************************/
/* */
/* Undefine this macro if you don't want to hint the metrics. There is */
/* no reason to do this (at least for non-CJK scripts), except for */
/* experimentation. */
/* */
#define AH_HINT_METRICS
/* define this macro if you do not want to insert extra edges at a glyph's */
/* x and y extrema (when there isn't one already available). This help */
/* reduce a number of artefacts and allow hinting of metrics.. */
/* */
/*************************************************************************/
/* */
/* Define this macro if you do not want to insert extra edges at a */
/* glyph's x and y extremum (if there isn't one already available). */
/* This helps to reduce a number of artefacts and allows hinting of */
/* metrics. */
/* */
#undef AH_OPTION_NO_EXTREMUM_EDGES
/* don't touch for now.. */
/* don't touch for now */
#define AH_MAX_WIDTHS 12
#define AH_MAX_HEIGHTS 12
/***************************************************************************/
/***************************************************************************/
/***************************************************************************/
/**** ****/
/**** TYPES DEFINITIONS ****/
/**** ****/
/***************************************************************************/
/***************************************************************************/
/***************************************************************************/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** TYPE DEFINITIONS ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* see agangles.h */
typedef FT_Int AH_Angle;
/* hint flags */
typedef enum AH_Flags_
{
ah_flah_none = 0,
#define ah_flah_none 0
/* bezier control points flags */
ah_flah_conic = 1,
ah_flah_cubic = 2,
ah_flah_control = ah_flah_conic | ah_flah_cubic,
#define ah_flah_conic 1
#define ah_flah_cubic 2
#define ah_flah_control ( ah_flah_conic | ah_flah_cubic )
/* extrema flags */
ah_flah_extrema_x = 4,
ah_flah_extrema_y = 8,
#define ah_flah_extrema_x 4
#define ah_flah_extrema_y 8
/* roundness */
ah_flah_round_x = 16,
ah_flah_round_y = 32,
#define ah_flah_round_x 16
#define ah_flah_round_y 32
/* touched */
ah_flah_touch_x = 64,
ah_flah_touch_y = 128,
#define ah_flah_touch_x 64
#define ah_flah_touch_y 128
/* weak interpolation */
ah_flah_weak_interpolation = 256,
#define ah_flah_weak_interpolation 256
/* never remove this one !! */
ah_flah_max
} AH_Flags;
typedef FT_Int AH_Flags;
/* edge hint flags */
typedef enum AH_Edge_Flags_
{
ah_edge_normal = 0,
ah_edge_round = 1,
ah_edge_serif = 2,
ah_edge_done = 4
#define ah_edge_normal 0
#define ah_edge_round 1
#define ah_edge_serif 2
#define ah_edge_done 4
} AH_Edge_Flags;
typedef FT_Int AH_Edge_Flags;
/* hint directions - the values are computed so that two vectors are */
/* in opposite directions iff "dir1+dir2 == 0" */
typedef enum AH_Direction_
{
ah_dir_none = 4,
ah_dir_right = 1,
ah_dir_left = -1,
ah_dir_up_and_down = 0,
ah_dir_left_and_right = 0,
ah_dir_up = 2,
ah_dir_down = -2
/* hint directions -- the values are computed so that two vectors are */
/* in opposite directions iff `dir1+dir2 == 0' */
#define ah_dir_none 4
#define ah_dir_right 1
#define ah_dir_left -1
#define ah_dir_up 2
#define ah_dir_down -2
} AH_Direction;
typedef FT_Int AH_Direction;
typedef struct AH_Point AH_Point;
typedef struct AH_Segment AH_Segment;
typedef struct AH_Edge AH_Edge;
/***************************************************************************
*
* <Struct>
* AH_Point
*
* <Description>
* A structure used to model an outline point to the AH_Outline type
*
* <Fields>
* flags :: current point hint flags
* ox, oy :: current original scaled coordinates
* fx, fy :: current coordinates in font units
* x, y :: current hinter coordinates
* u, v :: point coordinates - meaning varies with context
*
* in_dir :: direction of inwards vector (prev->point)
* out_dir :: direction of outwards vector (point->next)
*
* in_angle :: angle of inwards vector
* out_angle :: angle of outwards vector
*
* next :: next point in same contour
* prev :: previous point in same contour
*
*/
/*************************************************************************/
/* */
/* <Struct> */
/* AH_Point */
/* */
/* <Description> */
/* A structure used to model an outline point to the AH_Outline type. */
/* */
/* <Fields> */
/* flags :: The current point hint flags. */
/* */
/* ox, oy :: The current original scaled coordinates. */
/* */
/* fx, fy :: The current coordinates in font units. */
/* */
/* x, y :: The current hinter coordinates. */
/* */
/* u, v :: Point coordinates -- meaning varies with context. */
/* */
/* in_dir :: The direction of the inwards vector (prev->point). */
/* */
/* out_dir :: The direction of the outwards vector (point->next). */
/* */
/* in_angle :: The angle of the inwards vector. */
/* */
/* out_angle :: The angle of the outwards vector. */
/* */
/* next :: The next point in same contour. */
/* */
/* prev :: The previous point in same contour. */
/* */
struct AH_Point
{
AH_Flags flags; /* point flags used by hinter */
@ -193,37 +228,44 @@
};
/***************************************************************************
*
* <Struct>
* AH_Segment
*
* <Description>
* a structure used to describe an edge segment to the auto-hinter. A
* segment is simply a sequence of successive points located on the same
* horizontal or vertical "position", in a given direction.
*
* <Fields>
* flags :: segment edge flags ( straight, rounded.. )
* dir :: segment direction
*
* first :: first point in segment
* last :: last point in segment
* contour :: ptr to first point of segment's contour
*
* pos :: segment position in font units
* size :: segment size
*
* edge :: edge of current segment
* edge_next :: next segment on same edge
*
* link :: the pairing segment for this edge
* serif :: the primary segment for serifs
* num_linked :: the number of other segments that link to this one
*
* score :: used to score the segment when selecting them..
*
*/
/*************************************************************************/
/* */
/* <Struct> */
/* AH_Segment */
/* */
/* <Description> */
/* A structure used to describe an edge segment to the auto-hinter. */
/* A segment is simply a sequence of successive points located on the */
/* same horizontal or vertical `position', in a given direction. */
/* */
/* <Fields> */
/* flags :: The segment edge flags (straight, rounded, etc.). */
/* */
/* dir :: The segment direction. */
/* */
/* first :: The first point in the segment. */
/* */
/* last :: The last point in the segment. */
/* */
/* contour :: A pointer to the first point of the segment's */
/* contour. */
/* */
/* pos :: The segment position in font units. */
/* */
/* size :: The segment size. */
/* */
/* edge :: The edge of the current segment. */
/* */
/* edge_next :: The next segment on the same edge. */
/* */
/* link :: The pairing segment for this edge. */
/* */
/* serif :: The primary segment for serifs. */
/* */
/* num_linked :: The number of other segments that link to this one. */
/* */
/* score :: Used to score the segment when selecting them. */
/* */
struct AH_Segment
{
AH_Edge_Flags flags;
@ -247,38 +289,43 @@
};
/***************************************************************************
*
* <Struct>
* AH_Edge
*
* <Description>
* a structure used to describe an edge, which really is a horizontal
* or vertical coordinate which will be hinted depending on the segments
* located on it..
*
* <Fields>
* flags :: segment edge flags ( straight, rounded.. )
* dir :: main segment direction on this edge
*
* first :: first edge segment
* last :: last edge segment
*
* fpos :: original edge position in font units
* opos :: original scaled edge position
* pos :: hinted edge position
*
* link :: the linked edge
* serif :: the serif edge
* num_paired :: the number of other edges that pair to this one
*
* score :: used to score the edge when selecting them..
*
* blue_edge :: indicate the blue zone edge this edge is related to
* only set for some of the horizontal edges in a Latin
* font..
*
***************************************************************************/
/*************************************************************************/
/* */
/* <Struct> */
/* AH_Edge */
/* */
/* <Description> */
/* A structure used to describe an edge, which really is a horizontal */
/* or vertical coordinate to be hinted depending on the segments */
/* located on it. */
/* */
/* <Fields> */
/* flags :: The segment edge flags (straight, rounded, etc.). */
/* */
/* dir :: The main segment direction on this edge. */
/* */
/* first :: The first edge segment. */
/* */
/* last :: The last edge segment. */
/* */
/* fpos :: The original edge position in font units. */
/* */
/* opos :: The original scaled edge position. */
/* */
/* pos :: The hinted edge position. */
/* */
/* link :: The linked edge. */
/* */
/* serif :: The serif edge. */
/* */
/* num_paired :: The number of other edges that pair to this one. */
/* */
/* score :: Used to score the edge when selecting them. */
/* */
/* blue_edge :: Indicate the blue zone edge this edge is related to. */
/* Only set for some of the horizontal edges in a Latin */
/* font. */
/* */
struct AH_Edge
{
AH_Edge_Flags flags;
@ -335,78 +382,79 @@
} AH_Outline;
#define ah_blue_capital_top 0 /* THEZOCQS */
#define ah_blue_capital_bottom ( ah_blue_capital_top + 1 ) /* HEZLOCUS */
#define ah_blue_small_top ( ah_blue_capital_bottom + 1 ) /* xzroesc */
#define ah_blue_small_bottom ( ah_blue_small_top + 1 ) /* xzroesc */
#define ah_blue_small_minor ( ah_blue_small_bottom + 1 ) /* pqgjy */
#define ah_blue_max ( ah_blue_small_minor + 1 )
typedef enum AH_Blue_
{
ah_blue_capital_top, /* THEZOCQS */
ah_blue_capital_bottom, /* HEZLOCUS */
ah_blue_small_top, /* xzroesc */
ah_blue_small_bottom, /* xzroesc */
ah_blue_small_minor, /* pqgjy */
ah_blue_max
} AH_Blue;
typedef enum
{
ah_hinter_monochrome = 1,
ah_hinter_optimize = 2
} AH_Hinter_Flags;
typedef FT_Int AH_Blue;
/************************************************************************
*
* <Struct>
* AH_Globals
*
* <Description>
* Holds the global metrics for a given font face (be it in design
* units, or scaled pixel values)..
*
* <Fields>
* num_widths :: number of widths
* num_heights :: number of heights
* widths :: snap widths, including standard one
* heights :: snap height, including standard one
* blue_refs :: reference position of blue zones
* blue_shoots :: overshoot position of blue zones
*
************************************************************************/
#define ah_hinter_monochrome 1
#define ah_hinter_optimize 2
typedef FT_Int AH_Hinter_Flags;
/*************************************************************************/
/* */
/* <Struct> */
/* AH_Globals */
/* */
/* <Description> */
/* Holds the global metrics for a given font face (be it in design */
/* units or scaled pixel values). */
/* */
/* <Fields> */
/* num_widths :: The number of widths. */
/* */
/* num_heights :: The number of heights. */
/* */
/* widths :: Snap widths, including standard one. */
/* */
/* heights :: Snap height, including standard one. */
/* */
/* blue_refs :: The reference positions of blue zones. */
/* */
/* blue_shoots :: The overshoot positions of blue zones. */
/* */
typedef struct AH_Globals_
{
FT_Int num_widths;
FT_Int num_heights;
FT_Pos widths [ AH_MAX_WIDTHS ];
FT_Pos heights[ AH_MAX_HEIGHTS ];
FT_Pos widths [AH_MAX_WIDTHS];
FT_Pos heights[AH_MAX_HEIGHTS];
FT_Pos blue_refs [ ah_blue_max ];
FT_Pos blue_shoots[ ah_blue_max ];
FT_Pos blue_refs [ah_blue_max];
FT_Pos blue_shoots[ah_blue_max];
} AH_Globals;
/************************************************************************
*
* <Struct>
* AH_Face_Globals
*
* <Description>
* Holds the complete global metrics for a given font face (i.e. the
* design units version + a scaled version + the current scales used)
*
* <Fields>
* face :: handle to source face object
* design :: globals in font design units
* scaled :: scaled globals in sub-pixel values
* x_scale :: current horizontal scale
* y_scale :: current vertical scale
*
************************************************************************/
/*************************************************************************/
/* */
/* <Struct> */
/* AH_Face_Globals */
/* */
/* <Description> */
/* Holds the complete global metrics for a given font face (i.e., the */
/* design units version + a scaled version + the current scales */
/* used). */
/* */
/* <Fields> */
/* face :: A handle to the source face object */
/* */
/* design :: The globals in font design units. */
/* */
/* scaled :: Scaled globals in sub-pixel values. */
/* */
/* x_scale :: The current horizontal scale. */
/* */
/* y_scale :: The current vertical scale. */
/* */
typedef struct AH_Face_Globals_
{
FT_Face face;
@ -419,12 +467,10 @@
} AH_Face_Globals;
typedef struct AH_Hinter
{
FT_Memory memory;
FT_Long flags;
AH_Hinter_Flags flags;
FT_Int algorithm;
FT_Face face;
@ -439,4 +485,8 @@
} AH_Hinter;
#endif /* AGTYPES_H */
#endif /* AHTYPES_H */
/* END */

11
src/autohint/autohint.c
View File

@ -2,22 +2,23 @@
/* */
/* autohint.c */
/* */
/* Automatic Hinting wrapper. */
/* Automatic Hinting wrapper (body only). */
/* */
/* Copyright 2000: Catharon Productions Inc. */
/* Copyright 2000 Catharon Productions Inc. */
/* Author: David Turner */
/* */
/* This file is part of the Catharon Typography Project and shall only */
/* be used, modified, and distributed under the terms of the Catharon */
/* Open Source License that should come with this file under the name */
/* "CatharonLicense.txt". By continuing to use, modify, or distribute */
/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/* Note that this license is compatible with the FreeType license */
/* Note that this license is compatible with the FreeType license. */
/* */
/***************************************************************************/
#define FT_MAKE_OPTION_SINGLE_OBJECT
#ifdef FT_FLAT_COMPILE
@ -38,3 +39,5 @@
#endif
/* END */

74
src/autohint/mather.py
View File

@ -1,3 +1,21 @@
#!/usr/bin/env python
#
#
# autohint math table builder
#
# Copyright 1996-2000 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.
import math
ag_pi = 256
@ -5,50 +23,56 @@ ag_pi = 256
def print_arctan( atan_bits ):
atan_base = 1 << atan_bits
print "static AH_Angle ag_arctan[ 1L << AG_ATAN_BITS ] ="
print "{"
print " static AH_Angle ag_arctan[1L << AG_ATAN_BITS] ="
print " {"
count = 0
line = ""
line = " "
for n in range(atan_base):
for n in range( atan_base ):
comma = ","
if (n == atan_base-1):
if ( n == atan_base - 1 ):
comma = ""
angle = math.atan(n*1.0/atan_base)/math.pi*ag_pi
line = line + " " + repr(int(angle+0.5)) + comma
count = count+1;
if (count == 8):
angle = math.atan( n * 1.0 / atan_base ) / math.pi * ag_pi
line = line + " " + repr( int( angle + 0.5 ) ) + comma
count = count + 1;
if ( count == 8 ):
count = 0
print line
line = ""
line = " "
if (count >0):
if ( count > 0 ):
print line
print "};"
print " };"
# This routine is not used currently.
#
def print_sines():
print "static FT_Fixed ah_sines[ AG_HALF_PI+1 ] ="
print "{"
count = 0
line = ""
print " static FT_Fixed ah_sines[AG_HALF_PI + 1] ="
print " {"
for n in range(ag_pi/2):
sinus = math.sin(n*math.pi/ag_pi)
line = line + " " + repr(int(65536.0*sinus)) + ","
count = count+1
if (count == 8):
count = 0
line = " "
for n in range( ag_pi / 2 ):
sinus = math.sin( n * math.pi / ag_pi )
line = line + " " + repr( int( 65536.0 * sinus ) ) + ","
count = count + 1
if ( count == 8 ):
count = 0
print line
line = ""
line = " "
if (count > 0):
if ( count > 0 ):
print line
print " 65536"
print "};"
print " };"
print_arctan(8)
print_arctan( 8 )
print
# END

21
src/autohint/rules.mk
View File

@ -3,28 +3,17 @@
#
#
# Copyright 2000: Catharon Productions Inc.
# Copyright 2000 Catharon Productions Inc.
# Author: David Turner
#
# This file is part of the Catharon Typography Project and shall only
# be used, modified, and distributed under the terms of the Catharon
# Open Source License that should come with this file under the name
# "CatharonLicense.txt". By continuing to use, modify, or distribute
# `CatharonLicense.txt'. By continuing to use, modify, or distribute
# this file you indicate that you have read the license and
# understand and accept it fully.
#
# Note that this license is compatible with the FreeType license
#
#
# Copyright 1996-2000 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.
# Note that this license is compatible with the FreeType license.
# AUTO driver directory
@ -48,7 +37,9 @@ AUTO_DRV_SRC := $(AUTO_DIR_)ahangles.c \
# AUTO driver headers
#
AUTO_DRV_H := $(AUTO_DRV_SRC:%c=%h)
AUTO_DRV_H := $(AUTO_DRV_SRC:%c=%h) \
$(AUTO_DIR_)ahloader.h \
$(AUTO_DIR_)ahtypes.h
# AUTO driver object(s)

1
src/type1/rules.mk
View File

@ -70,4 +70,5 @@ $(OBJ_)%.$O: $(T1_DIR_)%.c $(FREETYPE_H) $(T1_DRV_H)
DRV_OBJS_S += $(T1_DRV_OBJ_S)
DRV_OBJS_M += $(T1_DRV_OBJ_M)
# EOF