AGI ?! FPU and OpenGL Radial blur tutorial in FASM

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Tyler Durden

Joined: 24 Feb 2004
Posts: 50

Tyler Durden 08 May 2004, 21:09

Hi there

I'm writing OpenGL tutorial in FASM 'bout Radial Blur. But it's too slow (on my GeForce 4 SE) ? Why ? So render 25 textured quads is too hard ? There is some code (variables used to stretch blur texture)

Code:

;fldz
fld  [blurDelta]
fadd [blurInc]
fstp [blurInc]
fld  [blurDec]
fsub [blurDelta]
fstp [blurDec]
fld  [blurAlpha]
fsub [alphaDelta]
fstp [blurAlpha]

If I uncomment fldz, the speed is greatle increased (why ?) but blur size is decreased Sad

Full source attahed... HELP !

Description:		Download
Filename:	rblur.rar
Filesize:	16.64 KB
Downloaded:	576 Time(s)

08 May 2004, 21:09

scientica
Retired moderator

Joined: 16 Jun 2003
Posts: 689
Location: Linköping, Sweden

scientica 09 May 2004, 16:30

fldz... hmm (thinks), isn't doesn't that push 0 to the fp stack? (st0 = 0.0f )
Maybe you should try mmx? (I've seen some examples where many pixels are processed at once)

(note: I put the code in yur post inside [ code ] tags - makes it easier to read code)

09 May 2004, 16:30

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