Block instance name redefinition when compiling shader

[the_glitch]

Godot Version

Godot 4.3

Question

I have written a simple compute shader

#[compute]
#version 450

layout(local_size_x = 16, local_size_y = 16, local_size_z = 1) in;

layout(set = 0, binding = 0, std430) restrict buffer IO {
    bool Corners[16][16];
    uint Valtable[16][16];
}

IO;

void main() {
    uint x = gl_GlobalInvocationID.x;
    uint y = gl_GlobalInvocationID.y;

    uint value = 0;

    if (x == 15 || y == 15)
        value = 0;
    else
        value = IO.Corners[x][y] * 1 + IO.Corners[x + 1][y] * 2 + IO.Corners[x][y + 1] * 4 + IO.Corners[x + 1][y + 1] * 8;


    IO.Valtable[x][y] = value;
}

However godot gives me this error at the bottom of the screen

Does anyone know how to fix this?

[dragonforge-dev]

It looks like you have written a simple shader in a shader language other than Godot’s version of GLSL 3.0. I’m unfamiliar with layout(), and I’m unfamiliar with your comment headers. Also I’m not sure what IO stands for, but I’m guessing you need to use the GLSL equivalent.

Shading language

[the_glitch]

IO is just the name for the input buffer. Layout is used in glsl, which godot utilizes for compute shaders.

Anyways, I figured out that the buffer name in layout() and the one following it needs to be different as so:

#[compute]
#version 450

layout(local_size_x = 16, local_size_y = 16, local_size_z = 1) in;

layout(set = 0, binding = 0, std430) restrict buffer bufferData {
    bool Corners[16][16];
    uint Valtable[16][16];
}

buff;

void main() {
    uint x = gl_GlobalInvocationID.x;
    uint y = gl_GlobalInvocationID.y;

    uint value = 0;

    if (x == 15 || y == 15)
        value = 0;
    else
        value = int(buff.Corners[x][y]) * 1 + int(buff.Corners[x + 1][y]) * 2 + int(buff.Corners[x][y + 1]) * 4 + int(buff.Corners[x + 1][y + 1]) * 8;


    buff.Valtable[x][y] = value;
}

[dragonforge-dev]

Cool. I learned something new.