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Blt between two primary surface.

Started by qwedcxza Dec 3, 2002 at 9:05 PM 4 replies 900+ views

Original Post

Dec 3, 2002 at 9:05 PM

I have two display card. now I can create two primary surface for each display but can''t blt them from one to other. is that Blt can''t support primary surface to primary surface?

qwedcxza

Dec 4, 2002 at 1:10 AM

I tryed blt from device No.1 in system memory surface( that created by No.1 ), but I can''t blt that in device No.2, except directly memory copy.

JonnyQuest

Dec 4, 2002 at 5:55 AM

The best way to do this is to simply store your sprites in standard arrays and just do your own blitting to DirectDraw.

- JQ
Full Speed Games. Are back.

qwedcxza

Dec 4, 2002 at 7:38 AM

That is not using for game, actually I want use DirectDraw copy content from primary display to secondary display.

JonnyQuest

Dec 4, 2002 at 9:47 AM

Well, you''ll have to read out from video memory, do a memcopy to the other card then. Note that reads from video memory are extremely slow, and should be avoided if at all possible.

- JQ
Full Speed Games. Are back.

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