105 lines
3.0 KiB
HLSL
105 lines
3.0 KiB
HLSL
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#include "UnityCG.cginc"
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UNITY_DECLARE_SCREENSPACE_TEXTURE(_MainTex);
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UNITY_DECLARE_SCREENSPACE_TEXTURE(_EALumSrc);
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UNITY_DECLARE_SCREENSPACE_TEXTURE(_EAHist);
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uniform half4 _MainTex_TexelSize;
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uniform half4 _MainTex_ST;
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uniform half4 _EyeAdaptation;
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struct appdata {
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float4 vertex : POSITION;
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half2 texcoord : TEXCOORD0;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct v2f {
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float4 pos : SV_POSITION;
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half2 uv: TEXCOORD0;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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UNITY_VERTEX_OUTPUT_STEREO
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};
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struct v2fCross {
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float4 pos : SV_POSITION;
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half2 uv1: TEXCOORD0;
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half2 uv2: TEXCOORD1;
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half2 uv3: TEXCOORD2;
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half2 uv4: TEXCOORD3;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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UNITY_VERTEX_OUTPUT_STEREO
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};
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v2f vert(appdata v) {
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v2f o;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_TRANSFER_INSTANCE_ID(v, o);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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o.pos = UnityObjectToClipPos(v.vertex);
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o.uv = UnityStereoScreenSpaceUVAdjust(v.texcoord, _MainTex_ST);
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return o;
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}
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v2fCross vertCross(appdata v) {
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v2fCross o;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_TRANSFER_INSTANCE_ID(v, o);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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o.pos = UnityObjectToClipPos(v.vertex);
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half3 offsets = _MainTex_TexelSize.xyy * half3(0.5, 0.5, 0);
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#if UNITY_SINGLE_PASS_STEREO
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offsets.xz *= 2.0;
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#endif
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o.uv1 = UnityStereoScreenSpaceUVAdjust(v.texcoord - offsets.xz, _MainTex_ST);
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o.uv2 = UnityStereoScreenSpaceUVAdjust(v.texcoord - offsets.zy, _MainTex_ST);
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o.uv3 = UnityStereoScreenSpaceUVAdjust(v.texcoord + offsets.xz, _MainTex_ST);
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o.uv4 = UnityStereoScreenSpaceUVAdjust(v.texcoord + offsets.zy, _MainTex_ST);
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return o;
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}
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inline half getLuma(half3 rgb) {
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const half3 lum = half3(0.299, 0.587, 0.114);
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return dot(rgb, lum);
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}
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half4 fragScreenLum (v2f i) : SV_Target {
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UNITY_SETUP_INSTANCE_ID(i);
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half4 c = UNITY_SAMPLE_SCREENSPACE_TEXTURE(_MainTex, i.uv);
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#if UNITY_COLORSPACE_GAMMA
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c.rgb = GammaToLinearSpace(c.rgb);
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#endif
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c.r = log(1.0 + getLuma(c.rgb));
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return c.rrrr;
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}
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half4 fragReduceScreenLum (v2fCross i) : SV_Target {
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UNITY_SETUP_INSTANCE_ID(i);
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half4 c1 = UNITY_SAMPLE_SCREENSPACE_TEXTURE(_MainTex, i.uv1);
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half4 c2 = UNITY_SAMPLE_SCREENSPACE_TEXTURE(_MainTex, i.uv2);
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half4 c3 = UNITY_SAMPLE_SCREENSPACE_TEXTURE(_MainTex, i.uv3);
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half4 c4 = UNITY_SAMPLE_SCREENSPACE_TEXTURE(_MainTex, i.uv4);
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c1.g = max( c1.g, max( c2.g, max( c3.g, c4.g )));
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c1.r = (c1.r + c2.r + c3.r + c4.r) * 0.25;
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return c1;
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}
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half4 fragBlendScreenLum (v2f i) : SV_Target {
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UNITY_SETUP_INSTANCE_ID(i);
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half4 c = UNITY_SAMPLE_SCREENSPACE_TEXTURE(_MainTex, 0.5.xx);
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half4 p = UNITY_SAMPLE_SCREENSPACE_TEXTURE(_EAHist , 0.5.xx);
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float speed = c.r < p.r ? _EyeAdaptation.z: _EyeAdaptation.w;
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c.a = speed * unity_DeltaTime.x;
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return c;
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}
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half4 fragBlend (v2f i) : SV_Target {
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UNITY_SETUP_INSTANCE_ID(i);
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half4 c = UNITY_SAMPLE_SCREENSPACE_TEXTURE(_MainTex, 0.5.xx);
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c.a = 1.0;
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return c;
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}
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