GLSL Error GL_EXT_gpu_shader4 not supported since latest Vulkan version

General TouchDesigner Discussion
1

Hi all,

I’m porting a project over from an older version of Touch into the latest vulkan release and I’m getting a ‘#extension’ : extension not supported: GL_EXT_gpu_shader4’ error message.

First hit of google gives me this page: ubuntu - vtk error: extension `GL_EXT_gpu_shader4' unsupported in fragment shader - Stack Overflow but I don’t see how I could apply this to save my patch.

I’m specifically looking to adapt this file: GitHub - yeataro/TD-Anisotropic-Kuwahara: Jan Eric Kyprianidis' Anisotropic Kuwahara filter in TouchDesigner.

Does anyone have any tips or insight?

Thank-you,
Owen

2

What happens if you just remove that line? What feature from that extension is needed that isn’t supported in the core GLSL 4.60?

3

Hi Malcom,

Thanks for the quick response. I was just about to delete this thread as I’ve found a solution. It involves replacing “textureSize2D” with “textureSize”, “texture2D” with “texture” and “uniform sampler2D src” with sTD2DInputs.

Now it works.

·

4

Hi, @owenkirby could you tell me how to use textureSize2D() please?

image
image2325×989 115 KB

5

Hi,

Just replace “textureSize2d” in your text box with “textureSize”.

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6

Hi Owen,
I’m also trying to update Anisotrophic Kuwahara - but I’m stuck on “replacing uniform sampler2D src” with sTD2DInputs.”

Can you show how that is done?


// by Jan Eric Kyprianidis <www.kyprianidis.com>
layout (location = 0) out vec4 fragColor;
extension GL_EXT_gpu_shader4 : enable

vec4 src = texture(sTD2DInputs[0], vUV.st)  <-- wrong

void main (void) {	
    vec2 src_size = vec2(textureSize(src, 0));
    vec2 uv = gl_FragCoord.xy / src_size;
    vec2 d = 1.0 / src_size;

    vec3 c = texture(src, uv).xyz;
    vec3 u = (
           -1.0 * texture(src, uv + vec2(-d.x, -d.y)).xyz +
           -2.0 * texture(src, uv + vec2(-d.x,  0.0)).xyz + 
           -1.0 * texture(src, uv + vec2(-d.x,  d.y)).xyz +
           +1.0 * texture(src, uv + vec2( d.x, -d.y)).xyz +
           +2.0 * texture(src, uv + vec2( d.x,  0.0)).xyz + 
           +1.0 * texture(src, uv + vec2( d.x,  d.y)).xyz
           ) / 4.0;

    vec3 v = (
           -1.0 * texture(src, uv + vec2(-d.x, -d.y)).xyz + 
           -2.0 * texture(src, uv + vec2( 0.0, -d.y)).xyz + 
           -1.0 * texture(src, uv + vec2( d.x, -d.y)).xyz +
           +1.0 * texture(src, uv + vec2(-d.x,  d.y)).xyz +
           +2.0 * texture(src, uv + vec2( 0.0,  d.y)).xyz + 
           +1.0 * texture(src, uv + vec2( d.x,  d.y)).xyz
           ) / 4.0;

    fragColor = vec4(dot(u, u), dot(v, v), dot(u, v), 1.0);
}
7

You can’t sample your texture outside of the main() function. This line:
vec3 c = texture(src, uv).xyz;
should be
vec3 c = texture(sTD2DInputs[0], uv).xyz;

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