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[bdf] Fix size and resolution handling.

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* src/bdf/bdfdrivr.c (BDF_Face_Init): Use `SIZE' values if
`POINT_SIZE', `RESOLUTION_X', or `RESOLUTION_Y' properties are
missing.

* docs/CHANGES: Document it.
This commit is contained in:
Werner Lemberg 2017-09-05 15:28:21 +02:00
parent f0898b9259
commit 7d017ba810
3 changed files with 42 additions and 6 deletions
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10
ChangeLog
View File

@ -1,3 +1,13 @@
2017-09-05 Werner Lemberg <wl@gnu.org>
[bdf] Fix size and resolution handling.
* src/bdf/bdfdrivr.c (BDF_Face_Init): Use `SIZE' values if
`POINT_SIZE', `RESOLUTION_X', or `RESOLUTION_Y' properties are
missing.
* docs/CHANGES: Document it.
2017-08-25 Alexei Podtelezhnikov <apodtele@gmail.com>
Swap `ALLOC_MULT' arguments (#51833).

6
docs/CHANGES
View File

@ -48,6 +48,12 @@ CHANGES BETWEEN 2.8 and 2.8.1
- FreeType now synthesizes a missing Unicode cmap for (older)
TrueType fonts also if glyph names are available.
- FreeType has improved handling of BDF fonts without the
`POINT_SIZE', `RESOLUTION_X', or `RESOLUTION_Y' properties; the
library now uses the values of the `SIZE' keyword if they are
missing. Previously, `SIZE' was completely ignored, and
FreeType used heuristic values instead.
======================================================================

32
src/bdf/bdfdrivr.c
View File

@ -437,6 +437,7 @@ THE SOFTWARE.
{
FT_Bitmap_Size* bsize = bdfface->available_sizes;
FT_Short resolution_x = 0, resolution_y = 0;
long value;
FT_ZERO( bsize );
@ -500,6 +501,17 @@ THE SOFTWARE.
64 * 7200,
72270L );
}
else if ( font->point_size )
{
if ( font->point_size > 0x7FFF )
{
bsize->size = 0x7FFF;
FT_TRACE0(( "BDF_Face_Init: clamping point size to value %d\n",
bsize->size ));
}
else
bsize->size = (FT_Pos)font->point_size << 6;
}
else
{
/* this is a heuristical value */
@ -525,36 +537,44 @@ THE SOFTWARE.
prop = bdf_get_font_property( font, "RESOLUTION_X" );
if ( prop )
value = prop->value.l;
else
value = (long)font->resolution_x;
if ( value )
{
#ifdef FT_DEBUG_LEVEL_TRACE
if ( prop->value.l < 0 )
if ( value < 0 )
FT_TRACE0(( "BDF_Face_Init: negative X resolution\n" ));
#endif
if ( prop->value.l > 0x7FFF || prop->value.l < -0x7FFF )
if ( value > 0x7FFF || value < -0x7FFF )
{
resolution_x = 0x7FFF;
FT_TRACE0(( "BDF_Face_Init: clamping X resolution to value %d\n",
resolution_x ));
}
else
resolution_x = FT_ABS( (FT_Short)prop->value.l );
resolution_x = FT_ABS( (FT_Short)value );
}
prop = bdf_get_font_property( font, "RESOLUTION_Y" );
if ( prop )
value = prop->value.l;
else
value = (long)font->resolution_y;
if ( value )
{
#ifdef FT_DEBUG_LEVEL_TRACE
if ( prop->value.l < 0 )
if ( value < 0 )
FT_TRACE0(( "BDF_Face_Init: negative Y resolution\n" ));
#endif
if ( prop->value.l > 0x7FFF || prop->value.l < -0x7FFF )
if ( value > 0x7FFF || value < -0x7FFF )
{
resolution_y = 0x7FFF;
FT_TRACE0(( "BDF_Face_Init: clamping Y resolution to value %d\n",
resolution_y ));
}
else
resolution_y = FT_ABS( (FT_Short)prop->value.l );
resolution_y = FT_ABS( (FT_Short)value );
}
if ( bsize->y_ppem == 0 )