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Programming > Borland Delphi > Re: Fast way of...
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Re: Fast way of splitting an image into bit planes ? (How would you re-write this code for speed up ?)

by "Skybuck Flying" <BloodyShame@[EMAIL PROTECTED] > Apr 29, 2008 at 06:54 PM

Ok,

I spent another day thinking about manipulating bits, and in particular a 
TBitStream.

I think it's safe to say IA32 pretty much sucks at manipulating massive 
ammounts of bits.

It's just too slow.

For example the best routine I had could manipulate up to 16 bits 
somewhere/at some bit position in memory without disturbing the rest of
the 
bits using around 28 instructions.

Which is still a bit too much for my taste. It might work or maybe not... 
but I am not gonna risk it.

For now no bit manipulations unless absolutely necessary ;)

So the universal code compression idea goes out the window, other 
compression idea's remain valid :) since those can be byte-aligned and
such.

Bye,
  Skybuck.
 




 37 Posts in Topic:
Fast way of splitting an image into bit planes ?
"Skybuck Flying"  2008-04-27 21:23:00 
Re: Fast way of splitting an image into bit planes ?
"Skybuck Flying"  2008-04-27 21:46:14 
Re: Fast way of splitting an image into bit planes ?
"Skybuck Flying"  2008-04-27 21:53:57 
Re: Fast way of splitting an image into bit planes ? (How would
"Skybuck Flying"  2008-04-28 20:43:33 
Re: Fast way of splitting an image into bit planes ? (How would
"Skybuck Flying"  2008-04-29 09:39:52 
Re: Fast way of splitting an image into bit planes ? (How would
"Skybuck Flying"  2008-04-29 10:14:23 
Re: Fast way of splitting an image into bit planes ? (How would
"Skybuck Flying"  2008-04-29 10:25:46 
Re: Fast way of splitting an image into bit planes ? (How would
"Skybuck Flying"  2008-04-29 10:27:56 
Re: Fast way of splitting an image into bit planes ?
Ivan Levashew <octagra  2008-04-28 02:58:04 
Re: Fast way of splitting an image into bit planes ?
Robert Redelmeier <red  2008-04-27 21:35:35 
Re: Fast way of splitting an image into bit planes ?
"Skybuck Flying"  2008-04-28 09:07:10 
Re: Fast way of splitting an image into bit planes ?
Wolfgang Draxinger <wd  2008-04-28 11:12:18 
Re: Fast way of splitting an image into bit planes ?
"Skybuck Flying"  2008-04-28 11:59:50 
Re: Fast way of splitting an image into bit planes ? (How would
penang@[EMAIL PROTECTED]   2008-04-29 03:42:18 
Re: Fast way of splitting an image into bit planes ? (How would
"Ken Hagan" <  2008-04-29 12:46:09 
Re: Fast way of splitting an image into bit planes ? (How would
"Skybuck Flying"  2008-04-29 13:56:42 
Re: Fast way of splitting an image into bit planes ? (How would
penang@[EMAIL PROTECTED]   2008-04-29 05:35:15 
Re: Fast way of splitting an image into bit planes ? (How would
"Skybuck Flying"  2008-04-29 14:59:43 
Re: Fast way of splitting an image into bit planes ? (How would
"Skybuck Flying"  2008-04-29 18:54:19 
Re: Fast way of splitting an image into bit planes ? (How would
"Skybuck Flying"  2008-04-29 19:02:51 
Re: Fast way of splitting an image into bit planes ? (How would
"Skybuck Flying"  2008-04-29 21:14:29 
Re: Fast way of splitting an image into bit planes ? (How would
"Skybuck Flying"  2008-04-29 21:19:49 
Re: Fast way of splitting an image into bit planes ? (How would
"Skybuck Flying"  2008-04-30 11:19:55 
Re: Fast way of splitting an image into bit planes ? (Skybuck's
"Skybuck Flying"  2008-04-30 17:20:12 
Re: Fast way of splitting an image into bit planes ? (Skybuck's
"Skybuck Flying"  2008-04-30 17:39:30 
Re: Fast way of splitting an image into bit planes ?
Bo Schwarzstein <Bo.Sc  2008-05-01 03:54:28 
Re: Fast way of splitting an image into bit planes ? (Skybuck's
pg <penang@[EMAIL PROT  2008-05-01 08:21:30 
Re: Fast way of splitting an image into bit planes ? (Skybuck's
"Skybuck Flying"  2008-05-01 20:19:01 
Re: Fast way of splitting an image into bit planes ?
Terence <tbwright@[EMA  2008-05-01 16:06:03 
Re: Fast way of splitting an image into bit planes ?
pg <penang@[EMAIL PROT  2008-05-02 18:01:31 
Re: Fast way of splitting an image into bit planes ? (Skybuck's
pg <penang@[EMAIL PROT  2008-05-02 18:03:40 
Re: Fast way of splitting an image into bit planes ? (Skybuck's
"Skybuck Flying"  2008-05-03 19:40:48 
Re: Fast way of splitting an image into bit planes ?
"windenntw@[EMAIL PR  2008-05-04 13:09:13 
Re: Fast way of splitting an image into bit planes ?
"Skybuck Flying"  2008-05-04 22:54:19 
Re: Fast way of splitting an image into bit planes ?
Nils <n.pipenbrinck@[E  2008-05-04 23:11:31 
Re: Fast way of splitting an image into bit planes ?
"Skybuck Flying"  2008-05-05 01:40:01 
Re: Fast way of splitting an image into bit planes ?
"Skybuck Flying"  2008-05-05 01:55:31 

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tan12V112 Mon Oct 13 4:32:41 CDT 2008.