metaforce/hecl/include/HECL/Backend/Metal.hpp

#ifndef HECLBACKEND_METAL_HPP
#define HECLBACKEND_METAL_HPP
#if BOO_HAS_METAL

namespace HECL
{
namespace Backend
{
    
struct Metal : ProgrammableCommon
{
    void reset(const IR& ir, Diagnostics& diag);
    std::string makeVert(unsigned col, unsigned uv, unsigned w,
                         unsigned skinSlots, unsigned texMtxs) const;
    std::string makeFrag(const ShaderFunction& lighting=ShaderFunction()) const;
    std::string makeFrag(const ShaderFunction& lighting,
                         const ShaderFunction& post) const;
    
private:
    std::string GenerateVertInStruct(unsigned col, unsigned uv, unsigned w) const;
    std::string GenerateVertToFragStruct() const;
    std::string GenerateVertUniformStruct(unsigned skinSlots, unsigned texMtxs) const;
    
    std::string EmitVec3(const atVec4f& vec) const
    {
        return HECL::Format("float3(%g,%g,%g)", vec.vec[0], vec.vec[1], vec.vec[2]);
    }
    
    std::string EmitTexGenSource2(TexGenSrc src, int uvIdx) const;
    std::string EmitTexGenSource4(TexGenSrc src, int uvIdx) const;
};
    
}
}

#endif // BOO_HAS_METAL
#endif // HECLBACKEND_METAL_HPP