[ft] Rendering problem

[Farmer, Anthony]

Hello.

 

I’m trying to load a font into a bitmap, then into an OpenGL texture for rendering, and have encountered a problem with the font baseline that I’m unable to resolve via online documentation or Google search.  Attached is a small bitmap showing what happens, which hopefully obviates what I’m doing wrong and how it can be corrected.

 

Briefly, I convert all the glyphs to bitmap glyphs then extract them sequentially into an OpenGL texture.  Later I use the X-offset into that texture for rendering text.  Unfortunately all the punctuation is being placed at the TOP of the GL texture, as if the baseline were there instead of along the bottom.  I don’t believe that’s the case, but that’s the behavior.

 

If there were some way I could extract the vertical location of the face’s BASELINE, I could adjust everything accordingly as glyphs are extracted.  But I see no way to get that baseline value.

 

Or perhaps there’s another approach altogether that I should be taking?

 

Thanks,

Anthony Farmer

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