Tint SPIRV parser error (struct member not found) #212

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1. vada4367 commented on Apr 4, 2026

   

   vada4367

   on Apr 4, 2026

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   Now it's really small:

   @vs vs
   void main() {
       gl_Position = vec4(0.0, 0.0, 0.0, 1.0);
   }
   @end
   
   @fs fs
   out vec4 frag_color;
   
   struct idx_t {
       uint i;
   };
   
   struct model_state_t {
       uint animation;
       uint frame;
   };
   
   struct model_instance_t {
       uint model;
       model_state_t state;
   };
   
   struct mesh_t {
       uint tri_start;
       uint bvh_root;
   };
   
   layout(binding = 3) readonly buffer models {
       idx_t animation_ptrs[];
   };
   
   layout(binding = 4) readonly buffer animations {
       idx_t frame_ptrs[];
   };
   
   layout(binding = 5) readonly buffer frames {
       mesh_t mesh_ptrs[];
   };
   
   layout(binding = 8) readonly buffer models_instances {
       model_instance_t scene_models_instances[];
   };
   
   mesh_t get_mesh(const uint model) {
       return mesh_ptrs[
           frame_ptrs[
               animation_ptrs[scene_models_instances[model].model].i
               + scene_models_instances[model].state.animation
           ].i + scene_models_instances[model].state.frame
       ];
   }
   
   void main() {
       mesh_t m = get_mesh(0);
       frag_color = vec4(float(m.tri_start));
   }
   @end
   
   @program raytracing vs fs
   
2. vada4367 commented on Apr 4, 2026

   

   vada4367

   on Apr 4, 2026

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   There is solution:

   mesh_t get_mesh(const uint model) {
       const uint inst = model;
       const uint model_idx = scene_models_instances[inst].model;
       const uint anim_base = animation_ptrs[model_idx].i;
       const uint anim_idx = anim_base + scene_models_instances[inst].state.animation;
       const uint frame_idx = frame_ptrs[anim_idx].i + scene_models_instances[inst].state.frame;
       return mesh_ptrs[frame_idx];
   }
   

   I will close issue if you want to.
3. vada4367 commented on Apr 5, 2026

   

   vada4367

   on Apr 5, 2026

   Last edited by vada4367

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   That's not how you solve it, I really do not know what is going on with mesh_t/bvh_t

   How to debug sokol-shdc?
4. floooh commented on Apr 5, 2026

   

   floooh

   on Apr 5, 2026

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   Hmm, the error is coming out of Tint's SPIRV parser (Google's WGSL compiler), e.g. not much I can do about it.

   Might be fixed in a more recent version of Tint, but updating isn't trivial. I'll keep the ticket open until I get around to that.
5. floooh

   changed the title [-]wgsl error[/-] [+]Tint SPIRV parser error (struct member not found)[/+] on Apr 5, 2026
6. vada4367 commented on Apr 5, 2026

   

   vada4367

   on Apr 5, 2026

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   How do you use it? I tried (git version), it says:

   spirv:1:1 error: Invalid SPIR-V binary version 1.4 for target environment SPIR-V 1.3 (under Vulkan 1.1 semantics).
7. floooh commented on Apr 5, 2026

   

   floooh

   on Apr 5, 2026

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   How do you use it? I tried (git version), it says:

   How do I use what, exactly? :)

   The Tint compiler is integrated into sokol-shdc as library, not called as an executable.