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Re: [ft-devel] Clear Type


From: Werner LEMBERG
Subject: Re: [ft-devel] Clear Type
Date: Sun, 21 Nov 2010 07:54:52 +0100 (CET)

> I have succesfully implemented FreeType, but have yet to get Clear
> Type rendering to work.

Be careful: ClearType consists of two parts.

  1. Special rendering to a LCD by tripling the horizontal resolution,
     then applying a filter to address the three colours of a pixel
     separately which must follow a certain geometry.  FreeType
     supports this.

  2. Use a special hinting engine which has some code to make item 1
     work with both new, specially crafted fonts and with legacy
     ones.  FreeType doesn't support this yet.

> I uncommented this line in "ftoption.h":
> #define FT_CONFIG_OPTION_SUBPIXEL_RENDERING

OK.

> Then I rebuilt the library and recompiled my project.  However, I
> get an error saying the identifier "FT_Library_SetLcdFilter" is not
> found when I add this line:
> 
> FT_Library_SetLcdFilter(library, FT_LCD_FILTER_DEFAULT);

You have

  #include FT_LCD_FILTER_H

right?


    Werner



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