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Fix Savannah bug #33816. 

* src/cff/cfftypes.h (CFF_FontRecDictRec): New member
`has_font_matrix'.
* src/cff/cffparse.c (cff_parse_font_matrix): Set it.
Update tracing output.
* src/cff/cffobjs.c (cff_face_init): Use it so that the heuristics
can be removed.
This commit is contained in:
Werner Lemberg 2011-09-07 15:01:20 +02:00
parent c9a69022dc
commit bb211ce6ce
4 changed files with 39 additions and 27 deletions
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11
ChangeLog
View File

@ -1,3 +1,14 @@
2011-09-07 Werner Lemberg <wl@gnu.org>
Fix Savannah bug #33816.
* src/cff/cfftypes.h (CFF_FontRecDictRec): New member
`has_font_matrix'.
* src/cff/cffparse.c (cff_parse_font_matrix): Set it.
Update tracing output.
* src/cff/cffobjs.c (cff_face_init): Use it so that the heuristics
can be removed.
2011-08-30 Werner Lemberg <wl@gnu.org>
Better tracing of metrics.

46
src/cff/cffobjs.c
View File

@ -607,7 +607,7 @@
goto Bad_Format;
}
if ( !dict->units_per_em )
if ( !dict->has_font_matrix )
dict->units_per_em = pure_cff ? 1000 : face->root.units_per_EM;
/* Normalize the font matrix so that `matrix->xx' is 1; the */
@ -652,26 +652,32 @@
FT_Fixed temp;
if ( sub->units_per_em )
if ( sub->has_font_matrix )
{
FT_Long scaling;
if ( top->units_per_em > 1 && sub->units_per_em > 1 )
scaling = FT_MIN( top->units_per_em, sub->units_per_em );
else
scaling = 1;
/* if we have a top-level matrix, */
/* concatenate the subfont matrix */
FT_Matrix_Multiply_Scaled( &top->font_matrix,
&sub->font_matrix,
scaling );
FT_Vector_Transform_Scaled( &sub->font_offset,
&top->font_matrix,
scaling );
if ( top->has_font_matrix )
{
if ( top->units_per_em > 1 && sub->units_per_em > 1 )
scaling = FT_MIN( top->units_per_em, sub->units_per_em );
else
scaling = 1;
sub->units_per_em = FT_MulDiv( sub->units_per_em,
top->units_per_em,
scaling );
FT_Matrix_Multiply_Scaled( &top->font_matrix,
&sub->font_matrix,
scaling );
FT_Vector_Transform_Scaled( &sub->font_offset,
&top->font_matrix,
scaling );
sub->units_per_em = FT_MulDiv( sub->units_per_em,
top->units_per_em,
scaling );
}
}
else
{
@ -690,16 +696,6 @@
{
*upm = FT_DivFix( *upm, temp );
/* if *upm is larger than 100*1000 we divide by 1000 -- */
/* this can happen if e.g. there is no top-font FontMatrix */
/* and the subfont FontMatrix already contains the complete */
/* scaling for the subfont (see section 5.11 of the PLRM) */
/* 100 is a heuristic value */
if ( *upm > 100L * 1000L )
*upm = ( *upm + 500 ) / 1000;
matrix->xx = FT_DivFix( matrix->xx, temp );
matrix->yx = FT_DivFix( matrix->yx, temp );
matrix->xy = FT_DivFix( matrix->xy, temp );

8
src/cff/cffparse.c
View File

@ -460,6 +460,8 @@
error = CFF_Err_Ok;
dict->has_font_matrix = TRUE;
/* We expect a well-formed font matrix, this is, the matrix elements */
/* `xx' and `yy' are of approximately the same magnitude. To avoid */
/* loss of precision, we use the magnitude of element `xx' to scale */
@ -498,11 +500,13 @@
*upm = power_tens[scaling];
FT_TRACE4(( " [%f %f %f %f]\n",
FT_TRACE4(( " [%f %f %f %f %f %f]\n",
(double)matrix->xx / *upm / 65536,
(double)matrix->xy / *upm / 65536,
(double)matrix->yx / *upm / 65536,
(double)matrix->yy / *upm / 65536 ));
(double)matrix->yy / *upm / 65536,
(double)offset->x / *upm / 65536,
(double)offset->y / *upm / 65536 ));
}
Exit:

1
src/cff/cfftypes.h
View File

@ -117,6 +117,7 @@ FT_BEGIN_HEADER
FT_Int paint_type;
FT_Int charstring_type;
FT_Matrix font_matrix;
FT_Bool has_font_matrix;
FT_ULong units_per_em; /* temporarily used as scaling value also */
FT_Vector font_offset;
FT_ULong unique_id;