121 lines
2.3 KiB
Plaintext
121 lines
2.3 KiB
Plaintext
// Parameters
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uniform float4x4 ViewProj;
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uniform texture2d image;
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uniform float4 pLift;
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uniform float4 pGamma;
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uniform float4 pGain;
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uniform float4 pOffset;
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uniform float3 pTintLow;
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uniform float3 pTintMid;
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uniform float3 pTintHig;
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uniform float4 pCorrection;
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// Data
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sampler_state def_sampler {
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Filter = Point;
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AddressU = Clamp;
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AddressV = Clamp;
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MinLOD = 0;
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MaxLOD = 0;
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};
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struct VertDataIn {
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float4 pos : POSITION;
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float2 uv : TEXCOORD0;
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};
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struct VertDataOut {
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float4 pos : POSITION;
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float2 uv : TEXCOORD0;
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};
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VertDataOut VSDefault(VertDataIn v)
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{
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VertDataOut ov;
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ov.pos = mul(float4(v.pos.xyz, 1.0), ViewProj);
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ov.uv = v.uv;
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return ov;
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}
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float4 Lift(float4 v)
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{
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v.rgb = pLift.aaa + v.rgb;
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v.rgb = pLift.rgb + v.rgb;
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return v;
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}
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float4 Gamma(float4 v)
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{
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v.rgb = pow(pow(v.rgb, pGamma.rgb), pGamma.aaa);
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return v;
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}
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float4 Gain(float4 v)
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{
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v.rgb *= pGain.rgb;
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v.rgb *= pGain.a;
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return v;
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}
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float4 Offset(float4 v)
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{
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v.rgb = pOffset.aaa + v.rgb;
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v.rgb = pOffset.rgb + v.rgb;
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return v;
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}
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float4 RGBtoHSV(float4 RGBA) {
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const float4 K = float4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
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const float e = 1.0e-10;
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float4 p = lerp(float4(RGBA.bg, K.wz), float4(RGBA.gb, K.xy), step(RGBA.b, RGBA.g));
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float4 q = lerp(float4(p.xyw, RGBA.r), float4(RGBA.r, p.yzx), step(p.x, RGBA.r));
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float d = q.x - min(q.w, q.y);
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return float4(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x, RGBA.a);
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}
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float4 HSVtoRGB(float4 HSVA) {
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const float4 K = float4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
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float4 v = float4(0,0,0,0);
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v.rgb = HSVA.z * lerp(K.xxx, clamp(abs(frac(HSVA.xxx + K.xyz) * 6.0 - K.www) - K.xxx, 0.0, 1.0), HSVA.y);
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v.a = HSVA.a;
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return v;
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}
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float4 Tint(float4 v)
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{
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float4 v1 = RGBtoHSV(v);
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float3 tint = float3(0,0,0);
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if (v1.b > 0.5) {
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tint = lerp(pTintMid, pTintHig, v1.b * 2.0 - 1.0);
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} else {
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tint = lerp(pTintLow, pTintMid, v1.b * 2.0);
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}
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v.rgb *= tint;
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return v;
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}
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float4 Correction(float4 v)
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{
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float4 v1 = RGBtoHSV(v);
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v1.r += pCorrection.r;
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v1.g *= pCorrection.g;
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v1.b *= pCorrection.b;
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float4 v2 = HSVtoRGB(v1);
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v2.rgb = ((v2.rgb - 0.5) * max(pCorrection.a, 0)) + 0.5;
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return v2;
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}
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float4 PSColorGrade(VertDataOut v) : TARGET
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{
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return Correction(Tint(Offset(Gain(Gamma(Lift(image.Sample(def_sampler, v.uv)))))));
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}
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technique Draw
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{
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pass
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{
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vertex_shader = VSDefault(v);
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pixel_shader = PSColorGrade(v);
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}
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}
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