shader-program | Lightweight WebGL Shader Helper | Graphics library

I'm trying to set up a pipeline to do some raymarching-rendering.

At first I set up a vertex and a geometry shader to take just 1 arbitrary float, and make a quad so I can use just the fragment shader, and input data via passing it through all shaders or uniforms.

But then I came across the compute shader, and found some tutorials but all just did nearly the same, making a quad and rendering compute-shaders output to it, I think that's pretty stupid, if you have the possibility to render how you want with the compute shader and still do tricks to get your result.

After some further research i found the function 'glFramebufferImage2D' and as far as I understood it, it attaches an ImageTexture (the one I wrote to with my compute shader in my case) to the Framebuffer (the buffer thats displayed as far as i understood it). So i dont have to do the quad generating trick. But the code I wrote just shows a black screen. Did i get something wrong? or did i missed something in my code?

This is my code: (I'm not worrying about warnings and detaching shader-programs yet. I just wanted to test the concept for now.)

main.rs