Re: [ft] Fw: [ft-devel] fitting a text

[Lawrence D'Oliveiro]

On Fri, 12 Jun 2015 09:58:17 +0200, folkert wrote:

>> My code prints out the computed bitmap dimensions (including
>> fractions); do the numbers agree with what you calculate?
> 
> Totally different. Also your script emits different values from my
> code. I converted your python script to c++:
> 
> your script:
> 
> char 95 wxh = 6x1 ascender -1 bearingx -1 kern 0
> char 103 wxh = 6x7 ascender 5 bearingx 0 kern 0
> char 113 wxh = 6x6 ascender 5 bearingx 0 kern 0
> char 116 wxh = 3x6 ascender 6 bearingx 0 kern 0
> char 101 wxh = 5x5 ascender 5 bearingx 0 kern 0
> char 115 wxh = 5x5 ascender 5 bearingx 0 kern 0
> char 116 wxh = 3x6 ascender 6 bearingx 0 kern 0
> char 49 wxh = 6x7 ascender 7 bearingx 2 kern 0
> char 50 wxh = 6x7 ascender 7 bearingx 1 kern 0
> char 51 wxh = 6x7 ascender 7 bearingx 0 kern 0
> bitmap dimensions wxh = 52x9
> 
> my c++ version:
> 
> char 95 w×h = 64×64 ascender 0 bearingx -64 kern 0
> char 103 w×h = 64×128 ascender 64 bearingx 0 kern 0
> char 113 w×h = 64×128 ascender 64 bearingx 0 kern 0
> char 116 w×h = 0×128 ascender 64 bearingx 0 kern 0
> char 101 w×h = 64×128 ascender 64 bearingx 0 kern 0
> char 115 w×h = 64×128 ascender 64 bearingx 0 kern 0
> char 116 w×h = 0×128 ascender 64 bearingx 0 kern 0
> char 49 w×h = 64×64 ascender 64 bearingx 0 kern 0
> char 50 w×h = 64×64 ascender 64 bearingx 0 kern 0
> char 51 w×h = 64×128 ascender 64 bearingx 0 kern 0
> bitmap dimensions w×h = 512×128

From your previous code posted,

> (void)FT_Set_Char_Size(face, target_height * 64, 0, 100, 0);

You are setting a resolution of 100dpi, whereas I am using 72dpi. That
will cause some inconsistency in the numbers. Also you are passing 0 for
the vertical values, which I know the docs say is fine. But my
Face.set_char_size routine always explicitly passes these; I wonder if
that makes a difference?