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Atari coding BBS
| Re: Clear 1 bpl fast? |
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Posted by: ggn
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Sep,12.2009-23:02
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Per,
If you're after a generic routine that does "take a block from coords x,y with w,h and copy it to another screen at x1,y1", I fully recommend using the routine that is on the blitter manual. I don't think you can get much faster than that.
Or, at the very least, use this routine to see how blitter variables are set up if you don't want to waste too many cpu cycles.
Finally, always keep in mind that source x/y, destination x/y, x count, endmask1/2/3,hop, op, skew and halftone registers once initialized, don't need to be initialised again. So (like atari's example), you only need to load y count, source and destination address for stuff like bitplane copying.
(and yes, using the blitter in share mode if you're doing anything with timers is recommended!).
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Date
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Clear 1 bpl fast?
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Per Almered (XiA)
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Sep,12.2009-13:05
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Re: Clear 1 bpl fast?
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frank_c_b
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Sep,12.2009-14:31
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Re: Clear 1 bpl fast?
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RA/pdx
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Sep,12.2009-15:38
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Re: Clear 1 bpl fast?
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evil
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Sep,12.2009-18:07
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Re: Clear 1 bpl fast?
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Per Almered (XiA)
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Sep,12.2009-21:53
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Re: Clear 1 bpl fast?
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Per Almered (XiA)
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Sep,12.2009-22:13
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Re: Clear 1 bpl fast?
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Frank_c_b
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Sep,12.2009-22:37
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Re: Clear 1 bpl fast?
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Per Almered (XiA)
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Sep,12.2009-22:43
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Re: Clear 1 bpl fast?
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frank_c_b
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Sep,12.2009-22:47
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Re: Clear 1 bpl fast?
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Per Almered (XiA)
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Sep,12.2009-22:56
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Re: Clear 1 bpl fast?
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frank_c_b
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Sep,12.2009-23:06
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Re: Clear 1 bpl fast?
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Frank_c_b
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Sep,12.2009-23:12
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Re: Clear 1 bpl fast?
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ggn
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Sep,12.2009-23:02
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Re: Clear 1 bpl fast?
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Bod
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Sep,13.2009-20:23
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Re: Clear 1 bpl fast?
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Per Almered (XiA)
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Sep,14.2009-21:11
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What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
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