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* src/base/ftstroke.c: fixed a bug that prevented the stroker to 

correctly generate stroked paths from closed paths, i.e. nearly
        all glyphs in vectorial fonts :-)

        The code is still _very_ buggy though, treat with special care.
This commit is contained in:
David Turner 2004-07-11 21:09:06 +00:00
parent f88003fa02
commit 5cbbf68516
2 changed files with 75 additions and 11 deletions
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8
ChangeLog
View File

@ -1,3 +1,11 @@
2004-07-11 David Turner <david@freetype.org>
* src/base/ftstroke.c: fixed a bug that prevented the stroker to
correctly generate stroked paths from closed paths, i.e. nearly
all glyphs in vectorial fonts :-)
The code is still _very_ buggy though, treat with special care.
2004-06-26 Peter Kovar <peter.kovar@r3.roburnet.sk>
* src/truetype/ttgload.c (load_truetype_glyph): Fix typo.

78
src/base/ftstroke.c
View File

@ -234,6 +234,7 @@
} FT_StrokeTags;
#define FT_STROKE_TAG_BEGIN_END (FT_STROKE_TAG_BEGIN|FT_STROKE_TAG_END)
typedef struct FT_StrokeBorderRec_
{
@ -626,6 +627,54 @@
}
static void
ft_stroke_border_reverse( FT_StrokeBorder border )
{
FT_Vector* point1 = border->points + border->start;
FT_Vector* point2 = border->points + border->num_points-1;
FT_Byte* tag1 = border->tags + border->start;
FT_Byte* tag2 = border->tags + border->num_points-1;
while ( point1 < point2 )
{
FT_Vector tpoint;
FT_Byte ttag1, ttag2, ttag;
/* swap the points
*/
tpoint = *point1;
*point1 = *point2;
*point2 = tpoint;
/* swap the tags
*/
ttag1 = *tag1;
ttag2 = *tag2;
#if 0
ttag = ttag1 & FT_STROKE_TAG_BEGIN_END;
if ( ttag == FT_STROKE_TAG_BEGIN ||
ttag == FT_STROKE_TAG_END )
ttag1 ^= FT_STROKE_TAG_BEGIN_END;
ttag = ttag2 & FT_STROKE_TAG_BEGIN_END;
if ( ttag == FT_STROKE_TAG_BEGIN ||
ttag == FT_STROKE_TAG_END )
ttag2 ^= FT_STROKE_TAG_BEGIN_END;
#endif
*tag1 = ttag2;
*tag2 = ttag1;
point1++;
point2--;
tag1++;
tag2--;
}
}
/***************************************************************************/
/***************************************************************************/
/***** *****/
@ -805,7 +854,7 @@
{
FT_StrokeBorder border = stroker->borders + side;
FT_Angle phi, theta, rotate;
FT_Fixed length, thcos, sigma;
FT_Fixed length, thcos;
FT_Vector delta;
FT_Error error = 0;
@ -822,9 +871,10 @@
phi = stroker->angle_in + theta;
thcos = FT_Cos( theta );
sigma = FT_MulFix( stroker->miter_limit, thcos );
if ( sigma < 0x10000L )
/* TODO: find better criterion
*/
if ( thcos < 0x4000 )
{
FT_Vector_From_Polar( &delta, stroker->radius,
stroker->angle_out + rotate );
@ -1351,12 +1401,18 @@
*dst_tag = *src_tag;
if ( open )
dst_tag[0] &= ~( FT_STROKE_TAG_BEGIN | FT_STROKE_TAG_END );
dst_tag[0] &= ~FT_STROKE_TAG_BEGIN_END;
else
{
FT_Byte ttag = dst_tag[0] & FT_STROKE_TAG_BEGIN_END;
/* switch begin/end tags if necessary.. */
if ( dst_tag[0] & ( FT_STROKE_TAG_BEGIN | FT_STROKE_TAG_END ) )
dst_tag[0] ^= ( FT_STROKE_TAG_BEGIN | FT_STROKE_TAG_END );
if ( ttag == FT_STROKE_TAG_BEGIN ||
ttag == FT_STROKE_TAG_END )
{
dst_tag[0] ^= FT_STROKE_TAG_BEGIN_END;
}
}
src_point--;
@ -1440,11 +1496,9 @@
if ( turn < 0 )
inside_side = 1;
/* IMPORTANT: WE DO NOT PROCESS THE INSIDE BORDER HERE! */
/* process the inside side */
/* error = ft_stroker_inside( stroker, inside_side ); */
/* if ( error ) */
/* goto Exit; */
error = ft_stroker_inside( stroker, inside_side );
if ( error )
goto Exit;
/* process the outside side */
error = ft_stroker_outside( stroker, 1 - inside_side );
@ -1452,6 +1506,8 @@
goto Exit;
}
ft_stroke_border_reverse( stroker->borders+0 );
/* then end our two subpaths */
ft_stroke_border_close( stroker->borders + 0 );
ft_stroke_border_close( stroker->borders + 1 );