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Author Topic: BitBlt  (Read 9853 times)

dusanx

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BitBlt
« on: May 30, 2009, 09:44:07 pm »
BitBlt works very fast on both Linux and Windows. I am completely sure that BitBlt uses graphics card hardware on both systems.
BitBlt on Mac works several times slower.

Is there anything I've been missing? Any substitute?
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Marc

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Re: BitBlt
« Reply #1 on: June 05, 2009, 01:59:25 am »
Only on windows is bitblt implemented by bitblt. On linux a serverside copy is used, which depending on your x server, might be done by hardware.
On OSX an image copy is done too, but apperently that routine doesn't use hardware.
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z505

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Re: BitBlt
« Reply #2 on: March 09, 2017, 05:44:49 am »
Sorry to revive old post.
Is there a fast macos solution?  >:(
And anything changed since 2009 now that it's called macOS and no longer MacOSX?

(This is not premature optimisation 101)
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Ñuño_Martínez

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Re: BitBlt
« Reply #3 on: March 09, 2017, 11:38:59 am »
Using OpenGL?
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z505

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Re: BitBlt
« Reply #4 on: March 09, 2017, 07:17:44 pm »
Yes, sometimes you want to use bitblt to get an image into opengl quickly, if that image is already in your memory and it will be loaded thousands of times, not just once initially. Then premature optimisation matters greatly and is of benefit :-)
« Last Edit: March 09, 2017, 07:20:06 pm by z505 »
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