Hello freetype!
I'm minho sun who is working at Samsung Research.
My main work is making text winset work in our UI framework named DALi.
We use freetype to get font information and freetype2 worked perfectly
since we updated it 2.6.x to 2.8.x.
After updating, freetype2 returns different descender value when using
same font.
Here is our code.
FontId FontClient::Plugin::CreateFont( const FontPath& path,
PointSize26Dot6
requestedPointSize,
FaceIndex faceIndex,
bool cacheDescription )
{
....snip....
int error = FT_Set_Char_Size( ftFace,
0,
requestedPointSize, // 28px to point
size -> 457
mDpiHorizontal, // 282
mDpiVertical ); // 282
if( FT_Err_Ok == error )
{
FT_Size_Metrics& ftMetrics = ftFace->size->metrics;
FontMetrics metrics( static_cast< float >( ftMetrics.ascender
) * FROM_266, // it means 1/64
static_cast< float >( ftMetrics.descender
) * FROM_266,
static_cast< float >( ftMetrics.height
) * FROM_266,
static_cast< float >(
ftFace->underline_position ) * FROM_266,
static_cast< float >(
ftFace->underline_thickness ) * FROM_266 );
mFontCache.push_back( FontFaceCacheItem( ftFace, path,
requestedPointSize, faceIndex, metrics ) );
id = mFontCache.size();
....snip....
We use FT_Set_Char_Size and pass 457 as required size and pass 282 as
dpi.
Then, in 2.6.x, we got 24 as ascender value and -4 as descender value.
But in 2.8.x, we got 24 as ascender value and -5 as descender value
even if using same font file.
This makes big problem because when sum of ascender and
descender is bigger than winset height, we change text to
ellipsis(...).
Is it kind of bug? I think it should return same value because we use
same font.
And plus, is it possible that the sum of asender and descender is
bigger than required size?
Best Regards,
Minho.
( I hope I can share the font file but it is secured file so I cannot
send to you now :( Sorry for that....)
[cid:[email protected]]
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yMjIzNGJkYzdhODc0OGZkNjMxNTFjMTA3ODUyNCZyZWNpcGllbnRBZGRyZXNzPWZyZWV0eX
BlQG5vbmdudS5vcmc_]
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