Shaders from shadertoy.com on old OpenGL 2.x gfx cards.

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D.J.Peters
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Joined: May 28, 2005 3:28
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Re: Shaders from shadertoy.com on old OpenGL 2.x gfx cards.

Postby D.J.Peters » Jan 05, 2020 16:45

dafhi wrote:abstract_terrain crash
@dafhi thank you for testing but more precision please !
compiletime or runtime or any error message with source line ?

DamageX wrote:Ah, so is it 32-bit address size then ?
May be the width of the GPU addressbus !

I wonder me the crapy intel GPU from dafhi and your newer GT640 as my GT240
both reports:
getLocalMemSize : 0 KB !
my:
getLocalMemSize : 16 KB

and why is your version:
OpenCL 1.1 CUDA 4.2.1 !
my:
OpenCL 1.1 CUDA 6.5.51

Do you use an old microsoft GeForce windows 10 driver or the latest NVIDEA driver ?

Joshy
dafhi
Posts: 1345
Joined: Jun 04, 2005 9:51

Re: Shaders from shadertoy.com on old OpenGL 2.x gfx cards.

Postby dafhi » Jan 05, 2020 18:35

RunTime. tried fbc 1.05 and 1.07.1 .. i tried also new laptop win10 intel Iris
D.J.Peters
Posts: 8027
Joined: May 28, 2005 3:28
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Re: Shaders from shadertoy.com on old OpenGL 2.x gfx cards.

Postby D.J.Peters » Jan 05, 2020 20:14

@dafhi only this one shader makes trouble all other works so far ?

Joshy
dafhi
Posts: 1345
Joined: Jun 04, 2005 9:51

Re: Shaders from shadertoy.com on old OpenGL 2.x gfx cards.

Postby dafhi » Jan 06, 2020 18:18

yep. i realize i could bug-hunt the glsl. might take a while ;)

[update] - n2D()

exhibit A

Code: Select all

  vec4 _fract = fract
    ( sin
      ( vec4(0, 1, 113, 114) + dot( i, vec2(1, 113) ) ) * 43758.5453
    );

exhibit B

Code: Select all

  ' when i remove mat2(_fract) *
  ' there is no more error
  return dot
    ( mat2(_fract) * vec2(1. - p.y, p.y),
      vec2(1. - p.x, p.x)
    );
Last edited by dafhi on Jan 07, 2020 13:26, edited 4 times in total.
DamageX
Posts: 124
Joined: Nov 21, 2009 8:42

Re: Shaders from shadertoy.com on old OpenGL 2.x gfx cards.

Postby DamageX » Jan 07, 2020 1:57

Windows 2000 is limited to old driver versions such as 310.70
hurtado
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Re: Shaders from shadertoy.com on old OpenGL 2.x gfx cards.

Postby hurtado » Feb 01, 2020 17:12

Ah, shaders demos are sexy, I did some time ago a stand alone version executable of the sea scape, in 24kb

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