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slight speed-up of the TrueType glyph loader

This commit is contained in:
David Turner 2007-06-11 00:18:00 +00:00
parent 84c6f88117
commit 5f5e544611
2 changed files with 20 additions and 14 deletions
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2
ChangeLog
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@ -1,5 +1,7 @@
2007-06-10 David Turner <david@freetype.org>
* src/truetype/ttgload.c: slight speed-up to the TrueType glyph loader
* include/freetype/config/ftoption.h: clarify documentation regarding
unpatented hinting

32
src/truetype/ttgload.c
View File

@ -251,6 +251,7 @@
FT_Vector *vec, *vec_limit;
FT_Pos x;
FT_Short *cont, *cont_limit;
FT_Int xy_size = 0;
/* check that we can add the contours to the glyph */
@ -362,23 +363,27 @@
flag = (FT_Byte*)outline->tags;
x = 0;
if ( p + xy_size > limit )
goto Invalid_Outline;
for ( ; vec < vec_limit; vec++, flag++ )
{
FT_Pos y = 0;
FT_Byte f = *flag;
if ( *flag & 2 )
if ( f & 2 )
{
if ( p + 1 > limit )
if (p + 1 > limit)
goto Invalid_Outline;
y = (FT_Pos)FT_NEXT_BYTE( p );
if ( ( *flag & 16 ) == 0 )
if ( ( f & 16 ) == 0 )
y = -y;
}
else if ( ( *flag & 16 ) == 0 )
else if ( ( f & 16 ) == 0 )
{
if ( p + 2 > limit )
if (p + 2 > limit)
goto Invalid_Outline;
y = (FT_Pos)FT_NEXT_SHORT( p );
@ -386,6 +391,7 @@
x += y;
vec->x = x;
*flag = f & ~(2|16);
}
/* reading the Y coordinates */
@ -398,20 +404,21 @@
for ( ; vec < vec_limit; vec++, flag++ )
{
FT_Pos y = 0;
FT_Byte f = *flag;
if ( *flag & 4 )
if ( f & 4 )
{
if ( p +1 > limit )
if (p + 1 > limit)
goto Invalid_Outline;
y = (FT_Pos)FT_NEXT_BYTE( p );
if ( ( *flag & 32 ) == 0 )
if ( ( f & 32 ) == 0 )
y = -y;
}
else if ( ( *flag & 32 ) == 0 )
else if ( ( f & 32 ) == 0 )
{
if ( p + 2 > limit )
if (p + 2 > limit)
goto Invalid_Outline;
y = (FT_Pos)FT_NEXT_SHORT( p );
@ -419,12 +426,9 @@
x += y;
vec->y = x;
*flag = f & ~(4|32);
}
/* clear the touch tags */
for ( n = 0; n < n_points; n++ )
outline->tags[n] &= FT_CURVE_TAG_ON;
outline->n_points = (FT_UShort)n_points;
outline->n_contours = (FT_Short) n_contours;