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PocketMatrix • View topic - DrawFont alternative for RGBA surfaces
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DrawFont alternative for RGBA surfaces


DrawFont alternative for RGBA surfaces

Postby Nacho84 » Oct 25, 2009 @ 10:06pm

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Postby edge » Oct 26, 2009 @ 9:35am

Hi Nacho,

Unfortunately, there is no support for text drawing on RGBA surfaces. The only way to handle this is to create your own font renderer and locking surfaces.
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Postby Nacho84 » Oct 27, 2009 @ 4:18am

Hi edge,

Thanks for your prompt reply. Just for curiosity's sake: why isn't this feature included in edgelib? I mean, if it's already implemented for RGB surfaces, isn't it the same algorithm for RGBA ones?

Cheers,

--Nacho
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Postby edge » Oct 28, 2009 @ 9:16am

Hi Nacho,

The main difference in blitting RGBA to RGBA would be the included alpha channel. To handle this, two options would be necessary:
- Blitting straight onto the RGBA surface, including the alpha channel (a simple memory copy)
- Read the alpha channel and 'blend them' somehow onto the destination surface
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