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PocketMatrix • View topic - GetDC() is really slow.
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GetDC() is really slow.


GetDC() is really slow.

Postby perrs » Oct 19, 2009 @ 11:52am

As I mentioned in an earlier thread I've been working on rendering text with a Device Context. Everything is working fine now, but it would seem that the GetDC() function is really slow. This wouldn't be a problem if I only had to call it once per frame, but apparently I'm not allowed to blit from the surface before I have released the Device Context. If I try I get an exception with the content "One or more surfaces are locked, preventing operation". This means that I will have to get and release the Device Context each time I need to draw some text, and seeing that this process easily takes about 25 ms this quickly becomes a major problem. Is there any way to blit from a surface without releasing the Device Context? If not, can you think of any other way to make this run faster?

Thanks in advance.

Per Rasmussen.
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Postby Johan » Oct 22, 2009 @ 6:47pm

Johan Sanneblad, M.Sc, Ph.D
GapiDraw Systems Architect
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Postby perrs » Oct 24, 2009 @ 4:17pm

Hi Johan,

Thank you for your reply. Honestly, I'm afraid the source code license is a bit outside of my budget. Is there no way to do this with the binary license?

Per Rasmussen.
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Postby Johan » Oct 24, 2009 @ 8:40pm

Hi Per,

Can you send me a PM and we'll see how we can resolve this.

Sincerely
Johan
Johan Sanneblad, M.Sc, Ph.D
GapiDraw Systems Architect
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