Re: [ft] display string

2010-02-02 Thread Werner LEMBERG

> When i am using *arial.ttf regular* file as input to convert the
> given string.  But i am not seeing them arranged in same line.  How
> to calculate baseline and how to show the images accordingly.

The most basic example file, example1.c, demonstrates how to do it
correctly.


Werner


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Re: [ft] ftgrays.c problem

2010-02-02 Thread Werner LEMBERG
> in function gray_render_cubic()
> 
> level = 1;
> da= da / ras.cubic_level;
> db= db / ras.conic_level;
> while ( da > 0 || db > 0 )
> {
>   da >>= 2;
>   db >>= 3;
>   level++;
> }
> 
> I think da should be divided by conic_level and db by cubic_level
> according to the context, or my mistake.

Hmm.  Can you explain how you come to this conclusion?  I don't
understand the heuristics either (this is one of the many speed-up
tricks left undocumented by David). If you have a cubic equation like

  ax³ + bx² + cx + d

my feeling is that `da' corresonds to the cubic term and `db' to the
quadratic one.

To be more precise: Have you done some comparisons (e.g., using a
profiler) or experienced better rendering results if you exchange
those two values?


 Werner
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Re: [ft] offset x offset y values?

2010-02-02 Thread Werner LEMBERG

> I would like to know about offset x, offset y, advance x and
> advance y?  Could any one please tell me where can i find more info
> about those?

Read the FreeType tutorials.


Werner
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[ft] distance between characters

2010-02-02 Thread rsr
Hi,



I would like to calculate the distance between one character to another char 
given a string,while converting to bitmap.How can i get the position of next 
character inorder to display with the same space as input string is?



Could anyone please explain me,how to do this?



Thanks

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Re: [ft] distance between characters

2010-02-02 Thread Werner LEMBERG

> I would like to calculate the distance between one character to
> another char given a string, while converting to bitmap. How can i
> get the position of next character inorder to display with the same
> space as input string is?

You can't.  FreeType expects characters as input and outputs glyph
images.  `The same space as input string' is thus meaningless.  After
some thinking I'm no longer sure at all what you want to know...

Please give an example.


Werner


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