Samplers as function parameters

[aras-p]

HLSL2GLSL cannot figure out what sampler type to cast to if the parameter and argument sampler type differ:

// You can't pass a generic sampler type ("sampler") to this float4 my_function(sampler2D s, float2 uv) { return tex2D(s, uv); }

// You can ONLY pass a generic sampler type ("sampler") to this float4 my_function(sampler s, float2 uv) { return tex2D(s, uv); }