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This commit is contained in:
Werner Lemberg 2002-08-22 08:49:42 +00:00
parent ec810f8c6a
commit edbcbde703
6 changed files with 81 additions and 65 deletions
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44
ChangeLog
View File

@ -6,26 +6,36 @@
2002-08-21 David Turner <david@freetype.org>
* src/pshinter/pshalgo3.c, src/autohint/ahangles.c,
src/autohint/ahangles.h, src/autohint/ahglyph.c, src/autohint/ahhint.c,
src/autohint/ahtypes.h: the automatic and Postscript hinter now
automatically detect inflection points in glyph outlines and treats
them specially. This is very useful to prevent nasty effect like the
disappearing diagonals of "S" and "s" in many, many fonts..
The automatic and Postscript hinter now automatically detect
inflection points in glyph outlines and treats them specially. This
is very useful to prevent nasty effect like the disappearing
diagonals of "S" and "s" in many, many fonts.
* src/tools/docmaker/docmaker.py, src/tools/docmaker/utils.py,
src/tools/docmaker/tohtml.py: updating the DocMaker tool
* src/autohint/ahtypes.h (ah_flag_inflection): New macro.
* src/autohint/ahangles.c (ah_angle_diff): New function.
* src/autohint/ahangles.h: Updated.
* src/autohint/ahglyph.c (ah_outline_compute_inflections): New
function.
(ah_outline_detect_features): Use it.
* src/autohint/ahhint.c (ah_hinter_align_strong_points)
[!AH_OPTION_NO_WEAK_INTERPOLATION]: Handle inflection.
* include/freetype/freetype.h, src/base/ftobjs.c: changing the type
of the "load_flags" parameter of FT_Load_Glyph and FT_Load_Char from
"FT_Int" to "FT_Int32", this in order to support more options.
this should only break binary and/or source compatibility on
16-bit platforms (Atari?)
* src/tools/docmaker/docmaker.py, src/tools/docmaker/utils.py,
src/tools/docmaker/tohtml.py: Updating the DocMaker tool.
* src/pshinter/pshalgo3.c, src/base/ftobjs.c, src/base/ftobject.c,
src/autohint/ahglyph.c, include/freetype/freetype.h: fixing typos
and removing compiler warnings
* include/freetype/freetype.h: Changing the type of the "load_flags"
parameter from "FT_Int" to "FT_Int32", this in order to support more
options. This should only break binary and/or source compatibility
on 16-bit platforms (Atari?).
(FT_LOAD_NO_AUTOHINT): New macro.
* src/base/ftobjs.c (FT_Load_Glyph): Updated.
Handle FT_LOAD_NO_AUTOHINT.
(FT_Load_Char): Updated.
* src/pshinter/pshalgo3.c, src/base/ftobjs.c, src/base/ftobject.c,
src/autohint/ahglyph.c, include/freetype/freetype.h: Fixing typos
and removing compiler warnings.
2002-08-20 Werner Lemberg <wl@gnu.org>

49
include/freetype/freetype.h
View File

@ -1908,9 +1908,9 @@ FT_BEGIN_HEADER
/* *not* the values in `face.glyph.metrics'. */
/* */
FT_EXPORT( FT_Error )
FT_Load_Glyph( FT_Face face,
FT_UInt glyph_index,
FT_Int32 load_flags );
FT_Load_Glyph( FT_Face face,
FT_UInt glyph_index,
FT_Int32 load_flags );
/*************************************************************************/
@ -1968,7 +1968,7 @@ FT_BEGIN_HEADER
/* the vector outline being loaded should not be scaled to 26.6 */
/* fractional pixels, but kept in notional units. */
/* */
#define FT_LOAD_NO_SCALE 1
#define FT_LOAD_NO_SCALE 0x1
/*************************************************************************/
@ -1983,7 +1983,7 @@ FT_BEGIN_HEADER
/* */
/* This flag is ignored if FT_LOAD_NO_SCALE is set. */
/* */
#define FT_LOAD_NO_HINTING 2
#define FT_LOAD_NO_HINTING 0x2
/*************************************************************************/
@ -1999,7 +1999,7 @@ FT_BEGIN_HEADER
/* Note that by default, @FT_Load_Glyph loads the glyph image in its */
/* native format. */
/* */
#define FT_LOAD_RENDER 4
#define FT_LOAD_RENDER 0x4
/*************************************************************************/
@ -2014,7 +2014,7 @@ FT_BEGIN_HEADER
/* bitmaps of scalable formats, as the native glyph image will be */
/* loaded, and can then be rendered through @FT_Render_Glyph. */
/* */
#define FT_LOAD_NO_BITMAP 8
#define FT_LOAD_NO_BITMAP 0x8
/*************************************************************************/
@ -2030,7 +2030,7 @@ FT_BEGIN_HEADER
/* advance width), and that the glyph image will translated to match */
/* the vertical bearings positions. */
/* */
#define FT_LOAD_VERTICAL_LAYOUT 16
#define FT_LOAD_VERTICAL_LAYOUT 0x10
/*************************************************************************/
@ -2043,9 +2043,9 @@ FT_BEGIN_HEADER
/* the function should try to auto-hint the glyphs, even if a driver */
/* specific hinter is available. */
/* */
/* Note that it is ignored if @FT_LOAD_NO_AUTOHINT is also set */
/* Note that it is ignored if @FT_LOAD_NO_AUTOHINT is also set. */
/* */
#define FT_LOAD_FORCE_AUTOHINT 32
#define FT_LOAD_FORCE_AUTOHINT 0x20
/*************************************************************************/
@ -2059,7 +2059,7 @@ FT_BEGIN_HEADER
/* space around its black bits) when loading it. For now, this */
/* really only works with embedded bitmaps in TrueType fonts. */
/* */
#define FT_LOAD_CROP_BITMAP 64
#define FT_LOAD_CROP_BITMAP 0x40
/*************************************************************************/
@ -2075,7 +2075,7 @@ FT_BEGIN_HEADER
/* error. Otherwise, errors are ignored by the loader, sometimes */
/* resulting in ugly glyphs. */
/* */
#define FT_LOAD_PEDANTIC 128
#define FT_LOAD_PEDANTIC 0x80
/*************************************************************************/
@ -2090,7 +2090,7 @@ FT_BEGIN_HEADER
/* X-TrueType font server, in order to deal correctly with the */
/* incorrect metrics contained in DynaLab's TrueType CJK fonts. */
/* */
#define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH 512
#define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH 0x200
/*************************************************************************/
@ -2111,7 +2111,7 @@ FT_BEGIN_HEADER
/* */
/* Note that the flag forces the load of unscaled glyphs. */
/* */
#define FT_LOAD_NO_RECURSE 1024
#define FT_LOAD_NO_RECURSE 0x400
/*************************************************************************/
@ -2124,7 +2124,7 @@ FT_BEGIN_HEADER
/* the glyph loader should not try to transform the loaded glyph */
/* image. */
/* */
#define FT_LOAD_IGNORE_TRANSFORM 2048
#define FT_LOAD_IGNORE_TRANSFORM 0x800
/*************************************************************************/
@ -2138,7 +2138,7 @@ FT_BEGIN_HEADER
/* glyph loader to use `ft_render_mode_mono' when calling */
/* @FT_Render_Glyph. */
/* */
#define FT_LOAD_MONOCHROME 4096
#define FT_LOAD_MONOCHROME 0x1000
/*************************************************************************/
@ -2151,10 +2151,12 @@ FT_BEGIN_HEADER
/* the function should return the linearly scaled metrics expressed */
/* in original font units, instead of the default 16.16 pixel values. */
/* */
#define FT_LOAD_LINEAR_DESIGN 8192
#define FT_LOAD_LINEAR_DESIGN 0x2000
/* temporary hack! */
#define FT_LOAD_SBITS_ONLY 16384
#define FT_LOAD_SBITS_ONLY 0x4000
/*************************************************************************/
/* */
@ -2163,20 +2165,21 @@ FT_BEGIN_HEADER
/* */
/* <Description> */
/* A bit field constant, used with @FT_Load_Glyph to indicate that */
/* the auto-hinter should never be run. This can be important for */
/* the auto-hinter should never be run. This can be important for */
/* certain fonts where un-hinted output is better than auto-hinted */
/* one. */
/* */
/* Note that this will _not_ prevent a native hinter to be run */
/* when available (i.e. for Postscript fonts, or for TrueType ones */
/* when the bytecode interpreter was compiled in) */
/* when the bytecode interpreter was compiled in). */
/* */
/* If you want to completely disable hinting, use @FT_LOAD_NO_HINTING */
/* instead. */
/* */
/* The @FT_LOAD_FORCE_AUTOHINT flag will not work if this flag is set */
/* The @FT_LOAD_FORCE_AUTOHINT flag will not work if this flag is */
/* set. */
/* */
#define FT_LOAD_NO_AUTOHINT 32768
#define FT_LOAD_NO_AUTOHINT 0x8000U
/*************************************************************************/
@ -2190,7 +2193,7 @@ FT_BEGIN_HEADER
/* embedded bitmaps are favored over outlines, vectors are always */
/* scaled and grid-fitted. */
/* */
#define FT_LOAD_DEFAULT 0
#define FT_LOAD_DEFAULT 0x0
/*************************************************************************/

1
src/autohint/ahangles.c
View File

@ -133,6 +133,7 @@
{
AH_Angle delta;
delta = ( angle2 - angle1 );
if ( delta < 0 )
delta += AH_2PI;

46
src/autohint/ahglyph.c
View File

@ -674,12 +674,14 @@
}
}
/* compute all inflex points in a given glyph */
/* compute all inflex points in a given glyph */
static void
ah_outline_compute_inflections( AH_Outline* outline )
{
AH_Point** contour = outline->contours;
AH_Point** contour_limit = contour + outline->num_contours;
AH_Point** contour = outline->contours;
AH_Point** contour_limit = contour + outline->num_contours;
/* load original coordinates in (u,v) */
ah_setup_uv( outline, ah_uv_fxy );
@ -698,8 +700,9 @@
AH_Angle diff_in, diff_out;
FT_Int finished = 0;
/* compute first segment in contour */
first = point;
first = point;
start = end = first;
do
@ -707,8 +710,8 @@
end = end->next;
if ( end == first )
goto Skip;
}
while ( end->u == first->u && end->v == first->v );
} while ( end->u == first->u && end->v == first->v );
vec.x = end->u - start->u;
vec.y = end->v - start->v;
@ -724,14 +727,14 @@
before = before->prev;
if ( before == first )
goto Skip;
}
while ( before->u == start->u && before->v == start->v );
} while ( before->u == start->u && before->v == start->v );
vec.x = start->u - before->u;
vec.y = start->v - before->v;
angle_in = ah_angle( &vec );
}
while ( angle_in == angle_seg );
} while ( angle_in == angle_seg );
first = start;
diff_in = ah_angle_diff( angle_in, angle_seg );
@ -749,14 +752,14 @@
after = after->next;
if ( after == first )
finished = 1;
}
while ( end->u == after->u && end->v == after->v );
} while ( end->u == after->u && end->v == after->v );
vec.x = after->u - end->u;
vec.y = after->v - end->v;
angle_out = ah_angle( &vec );
}
while ( angle_out == angle_seg );
} while ( angle_out == angle_seg );
diff_out = ah_angle_diff( angle_seg, angle_out );
@ -769,8 +772,8 @@
{
start->flags |= ah_flag_inflection;
start = start->next;
}
while ( start != end );
} while ( start != end );
start->flags |= ah_flag_inflection;
}
@ -779,8 +782,8 @@
end = after;
angle_seg = angle_out;
diff_in = diff_out;
}
while ( !finished );
} while ( !finished );
Skip:
;
@ -788,7 +791,6 @@
}
FT_LOCAL_DEF( void )
ah_outline_compute_segments( AH_Outline* outline )
{
@ -1401,9 +1403,9 @@
FT_LOCAL_DEF( void )
ah_outline_detect_features( AH_Outline* outline )
{
ah_outline_compute_segments( outline );
ah_outline_link_segments ( outline );
ah_outline_compute_edges ( outline );
ah_outline_compute_segments ( outline );
ah_outline_link_segments ( outline );
ah_outline_compute_edges ( outline );
ah_outline_compute_inflections( outline );
}

4
src/autohint/ahhint.c
View File

@ -612,8 +612,8 @@
#ifndef AH_OPTION_NO_WEAK_INTERPOLATION
/* if this point is candidate to weak interpolation, we will */
/* interpolate it after all strong points have been processed */
if ( (point->flags & ah_flag_weak_interpolation) &&
!(point->flags & ah_flag_inflection) )
if ( ( point->flags & ah_flag_weak_interpolation ) &&
!( point->flags & ah_flag_inflection ) )
continue;
#endif

2
src/pshinter/pshalgo3.c
View File

@ -1438,7 +1438,7 @@
continue;
if ( !psh3_point_is_extremum( point ) &&
!psh3_point_is_inflection( point ) )
!psh3_point_is_inflex( point ) )
continue;
point->flags &= ~PSH3_POINT_SMOOTH;