Metal: GLSL shader compatibility changes for global uniform and interface name collision.

For the Metal shader translation support for shader-global uniforms are remapped via macro's, and in such cases where a uniform name matches a vertex attribute name, compilation errors will occur due to this injected syntax being incompatible with the immediate code.

Also adding source-level function interface alternatives where sized arrays are passed in. These are not supported directly in Metal shading language and are instead handled as pointers. These pointers require explicit address-space qualifiers in some cases, if device/constant address space memory is passed into the function.

Ref T96261

Reviewed By: fclem

Differential Revision: https://developer.blender.org/D15898

source/blender/gpu/shaders/gpu_shader_3D_polyline_frag.glsl

@@ -7,7 +7,7 @@ void main()
     discard;
   }
 #endif
-  fragColor = interp.color;
+  fragColor = interp.final_color;
   if (lineSmooth) {
     fragColor.a *= clamp((lineWidth + SMOOTH_WIDTH) * 0.5 - abs(interp.smoothline), 0.0, 1.0);
   }

source/blender/gpu/shaders/gpu_shader_3D_polyline_geom.glsl

@@ -18,14 +18,14 @@ vec4 clip_line_point_homogeneous_space(vec4 p, vec4 q)
 void do_vertex(const int i, vec4 pos, vec2 ofs)
 {
 #if defined(UNIFORM)
-  interp_out.color = color;
+  interp_out.final_color = color;
 
 #elif defined(FLAT)
   /* WATCH: Assuming last provoking vertex. */
-  interp_out.color = interp_in[1].color;
+  interp_out.final_color = interp_in[1].final_color;
 
 #elif defined(SMOOTH)
-  interp_out.color = interp_in[i].color;
+  interp_out.final_color = interp_in[i].final_color;
 #endif
 
 #ifdef CLIP

source/blender/gpu/shaders/gpu_shader_3D_polyline_vert.glsl

@@ -3,7 +3,7 @@ void main()
 {
   gl_Position = ModelViewProjectionMatrix * vec4(pos, 1.0);
 #ifndef UNIFORM
-  interp.color = color;
+  interp.final_color = color;
 #endif
 #ifdef CLIP
   interp.clip = dot(ModelMatrix * vec4(pos, 1.0), ClipPlane);

source/blender/gpu/shaders/infos/gpu_shader_3D_polyline_info.hh

@@ -9,7 +9,7 @@
 #include "gpu_shader_create_info.hh"
 
 GPU_SHADER_INTERFACE_INFO(gpu_shader_3D_polyline_iface, "interp")
-    .smooth(Type::VEC4, "color")
+    .smooth(Type::VEC4, "final_color")
     .smooth(Type::FLOAT, "clip")
     .no_perspective(Type::FLOAT, "smoothline");