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Quick question on locking a surface...

Started by serratemplar Oct 17, 2000 at 11:38 PM 2 replies 150+ views

Original Post

Oct 17, 2000 at 11:38 PM

Please tell me if I this statement is correct: I only have to lock a surface if I am accessing the memory within it directly. That is to say, I do not have to lock a surface when I use the blitter. Is this true or false? =) I imagine it is important and I fear weird errors and problems cropping up without explanation since it''s working now w/o locking but I''m not certain of the truth. You guys rock; thanks! Maybe someday...*I''ll* be able to answer questions for people like me =) ~Steve

Quantum

Oct 18, 2000 at 5:13 AM

true.
you only need to lock the surface when you want a direct pointer to the video memory
otherwise you just let DX handle it for you

furby100

Oct 18, 2000 at 9:13 AM

You do not need to lock when you use Blt or BltFast. In fact you will get an error if you do. So you should not lock when you Blt or BltFast, but you should lock if you plan on accessing the memory directly through a pointer.

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#pragma twice

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serratemplar

Oct 18, 2000 at 9:26 AM

Thank you =D

~Steve

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