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* src/truetype/ttdriver.c (Set_Char_Sizes): Avoid unnecessary 

computations and clean up.

* src/truetype/ttobjs.h (struct TT_SizeRec_): Comment on the
internal copy of metrics.
This commit is contained in:
Wu, Chia-I (吳佳一) 2005-07-26 08:14:03 +00:00
parent baed3dd044
commit 2a41ab9e88
3 changed files with 31 additions and 27 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2005-07-26 Chia I Wu <b90201047@ntu.edu.tw>
* src/truetype/ttdriver.c (Set_Char_Sizes): Avoid unnecessary
computations and clean up.
* src/truetype/ttobjs.h (struct TT_SizeRec_): Comment on the
internal copy of metrics.
2005-07-12 Werner Lemberg <wl@gnu.org>
* include/freetype/ftoutln.h (FT_Outline_Embolden): Fix prototype.

45
src/truetype/ttdriver.c
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@ -167,40 +167,33 @@
FT_UInt horz_resolution,
FT_UInt vert_resolution )
{
TT_Size size = (TT_Size)ttsize;
FT_Size_Metrics* metrics = &size->root.metrics;
FT_Size_Metrics* metrics2 = &size->metrics;
TT_Face face = (TT_Face)size->root.face;
FT_Long dim_x, dim_y;
TT_Size size = (TT_Size)ttsize;
FT_Size_Metrics* metrics = &size->metrics;
TT_Face face = (TT_Face)size->root.face;
*metrics2 = *metrics;
/* copy the result from base layer */
*metrics = size->root.metrics;
/* This bit flag, when set, indicates that the pixel size must be */
/* truncated to an integer. Nearly all TrueType fonts have this */
/* bit set, as hinting won't work really well otherwise. */
/* rounded to integer. Nearly all TrueType fonts have this bit */
/* set, as hinting won't work really well otherwise. */
/* */
if ( ( face->header.Flags & 8 ) != 0 )
{
/* we need to use rounding in the following computations. Otherwise,
* the resulting hinted outlines will be very slightly distorted
*/
dim_x = ( ( char_width * horz_resolution + (36+32*72) ) / 72 ) & ~63;
dim_y = ( ( char_height * vert_resolution + (36+32*72) ) / 72 ) & ~63;
}
else
{
dim_x = ( ( char_width * horz_resolution + 36 ) / 72 );
dim_y = ( ( char_height * vert_resolution + 36 ) / 72 );
}
FT_Long dim_x, dim_y;
/* we only modify "metrics2", not "metrics", so these changes have */
/* no effect on the result of the auto-hinter when it is used */
/* */
metrics2->x_ppem = (FT_UShort)( dim_x >> 6 );
metrics2->y_ppem = (FT_UShort)( dim_y >> 6 );
metrics2->x_scale = FT_DivFix( dim_x, face->root.units_per_EM );
metrics2->y_scale = FT_DivFix( dim_y, face->root.units_per_EM );
dim_x = ( char_width * horz_resolution + 36 ) / 72;
dim_y = ( char_height * vert_resolution + 36 ) / 72;
dim_x = FT_PIX_ROUND(dim_x);
dim_y = FT_PIX_ROUND(dim_y);
metrics->x_ppem = (FT_UShort)( dim_x >> 6 );
metrics->y_ppem = (FT_UShort)( dim_y >> 6 );
metrics->x_scale = FT_DivFix( dim_x, face->root.units_per_EM );
metrics->y_scale = FT_DivFix( dim_y, face->root.units_per_EM );
}
size->ttmetrics.valid = FALSE;
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS

5
src/truetype/ttobjs.h
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@ -316,7 +316,10 @@ FT_BEGIN_HEADER
{
FT_SizeRec root;
FT_Size_Metrics metrics; /* slightly different from the root metrics */
/* we have our own copy of metrics so that we can modify */
/* it without affecting auto-hinting (when used) */
FT_Size_Metrics metrics;
TT_Size_Metrics ttmetrics;
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS