GLSLPROGRAM METALPROGRAM unity

https://docs.unity3d.com/Manual/SL-GLSLShaderPrograms.html

unity里面可以直接写原生的shader

用相应的宏包起来

CGPROGRAM

GLSLPROGRAM

HLSLPROGRAM

METALPROGRAM　　

ENDCG ENDGLSL ENDHLSL ENDMETAL

Shader "MetalSimpleTexture"

{

    Properties

    {

        _MainTex ("Texture", 2D) = "white" {}

        _Color ("Main Color", Color) = (1,1,1,1)

    }

    SubShader

    {

        Tags { "RenderType"="Opaque" }

        LOD 100

        Pass

        {

            METALINCLUDE

            #include <metal_stdlib>

            #include <metal_texture>

            ENDMETAL

            METALPROGRAM

            #pragma vertex vert

            #pragma fragment frag

            using namespace metal;

            // currently METALPROGRAM supports only one uniform buffer, shared between vertex program and fragment shader

            struct Globals

            {

                METAL_CONST_MATRIX(float, 4,4, unity_ObjectToWorld);

                METAL_CONST_MATRIX(float, 4,4, unity_MatrixVP);

                METAL_CONST_VECTOR(half, 4, _Color);

            };

            struct InputVP

            {

                float4 pos METAL_VERTEX_INPUT(0);

                float2 uv METAL_VERTEX_INPUT(3);

            };

            struct OutputVP

            {

                float4 pos [[ position ]];

                float2 uv [[ user(TEXCOORD0) ]];

            };

            struct OutputFS

            {

                half4 color [[ color(0) ]];

            };

            vertex OutputVP vert(constant Globals& glob [[ buffer(0) ]], InputVP input [[ stage_in ]])

            {

                OutputVP output;

                output.pos = glob.unity_MatrixVP * (glob.unity_ObjectToWorld * input.pos);

                output.uv = input.uv;

                return output;

            }

            fragment OutputFS frag(constant Globals& glob [[ buffer(0) ]], OutputVP input [[ stage_in ]], METAL_TEX_INPUT(texture2d<half, access::sample>, 0, _MainTex))

            {

                OutputFS output;

                output.color.rgb = glob._Color.rgb * _MainTex.sample(sampler__MainTex, input.uv).xyz;

                output.color.a = 1;

                return output;

            }

            ENDMETAL

        }

    }

}