Mutliple `sg_apply_uniforms` in a pipeline influence other render target

[pratamabayu]

Hi @floooh ,

I'm not sure this is bug or not. But i have issue with multiple sg_apply_uniforms when creating multiple render target. I just test on metal.

This's my logic

// render target 1
sg_begin_pass(...);
sg_apply_pipeline(...);
sg_apply_bindings(...);
sg_apply_uniforms(...); // in vertex stage
sg_draw(...);
sg_end_pass();

// render target 2
sg_begin_pass(...);
sg_apply_pipeline(...);
sg_apply_bindings(...);
sg_apply_uniforms(...); // in vertex stage
sg_apply_uniforms(...); // in fragment stage, ub 0
sg_apply_uniforms(...); // in fragment stage, ub 1
sg_draw(...);
sg_end_pass();

// default pass ...

They result clear color only. If I remove the whole of render target 2 code block or sg_apply_uniforms(...); // in fragment stage, ub 0, render target 1 works fine.

This is my UB shade part in render target 2

uniform light_params {

    vec2 halfPixel;
    vec3 cameraPosition;

    vec3 lightDirection;
    vec3 lightColor;
};

uniform transform_params {
    mat4 view;
    mat4 inverseViewProjection;
};

Below is the issue, all render targets just render clear color :

Below is the screenshot when i remove the render target 2 code block or sg_apply_uniforms(...); // in fragment stage, ub 0 :

In my opinion, if my mesh or shader is broken in render target 2. It shouldn't affect render target 1 right?

[floooh]

Do you see any validation layer messages from sokol-gfx or the Metal validation layer?

[pratamabayu]

Unfortunetly, I didn't see anything about sokol-gfx or metal validation output.

[floooh]

Couple more questions:

• Is the code public somewhere so I can have a quick look?
• Are you using the sokol-shdc tool or pass in the shader code and reflection info yourself?
• Did you check how it looks in the Metal debugger integrated into Xcode? This lets you check what uniforms are arriving down in the shader (I suspect there's some uniform data mismatch happening)

[pratamabayu]

Oh, my bad. It's my fault. I forgot to get the right pipeline from the cache when rendering offscreen. So this issue just in my framework, the sokol_gfx works well.