// Amplify Motion - Full-scene Motion Blur for Unity Pro
// Copyright (c) Amplify Creations, Lda <info@amplify.pt>

Shader "Hidden/Amplify Motion/Debug" {
	Properties {
		_MainTex ("Base (RGB)", 2D) = "white" {}
		_MotionTex ("Motion (RGB)", 2D) = "white" {}
	}
	SubShader {
		Pass {
			ZTest Always Cull Off ZWrite Off Fog { Mode off }

			CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#pragma fragmentoption ARB_precision_hint_fastest
				#pragma exclude_renderers flash
				#include "UnityCG.cginc"

				sampler2D _MainTex;
				sampler2D _MotionTex;
				sampler2D _CameraDepthTexture;
				float4 _MainTex_TexelSize;

				struct v2f
				{
					float4 pos : SV_POSITION;
					float4 uv : TEXCOORD0;
				};

				v2f vert( appdata_img v )
				{
					v2f o;
					o.pos = mul( UNITY_MATRIX_MVP, v.vertex );
					o.uv.xy = v.texcoord.xy;
					o.uv.zw = v.texcoord.xy;
				#if UNITY_UV_STARTS_AT_TOP
					if ( _MainTex_TexelSize.y < 0 )
						o.uv.w = 1 - o.uv.w;
				#endif
					return o;
				}

				half4 frag( v2f i ) : SV_Target
				{
					half4 motion = tex2D( _MotionTex, i.uv.zw );
					half2 vec = ( motion.xy * 2 - 1 ) * motion.z;
					half id = motion.w;
					return half4( vec, id * 10, 1 );
				}
			ENDCG
		}
	}

	Fallback Off
}