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/*
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   Color Mangler
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   Author: hunterk
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   License: Public domain
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*/
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#pragma parameter display_gamma "Display Gamma" 2.2 0.0 10.0 0.1

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#pragma parameter target_gamma "Target Gamma" 2.2 0.0 10.0 0.1

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#pragma parameter sat "Saturation" 1.0 0.0 3.0 0.01

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#pragma parameter lum "Luminance" 1.0 0.0 5.0 0.01

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#pragma parameter cntrst "Contrast" 1.0 0.0 2.0 0.01

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#pragma parameter vignette "Vignette Toggle" 1.0 0.0 1.0 1.0

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#pragma parameter hotspot "Hotspot" 0.0 0.0 1.0 0.1

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#pragma parameter inner "Inner Ring" 0.35 0.0 1.0 0.01

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#pragma parameter outer "Outer Ring" 0.7 0.0 1.0 0.01

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#pragma parameter r "Red" 1.0 0.0 2.0 0.01

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#pragma parameter g "Green" 1.0 0.0 2.0 0.01

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#pragma parameter b "Blue" 1.0 0.0 2.0 0.01

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#pragma parameter rg "Red-Green Tint" 0.0 0.0 1.0 0.005

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#pragma parameter rb "Red-Blue Tint" 0.0 0.0 1.0 0.005

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#pragma parameter gr "Green-Red Tint" 0.0 0.0 1.0 0.005

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#pragma parameter gb "Green-Blue Tint" 0.0 0.0 1.0 0.005

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#pragma parameter br "Blue-Red Tint" 0.0 0.0 1.0 0.005

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#pragma parameter bg "Blue-Green Tint" 0.0 0.0 1.0 0.005

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#pragma parameter blr "Black-Red Tint" 0.0 0.0 1.0 0.005

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#pragma parameter blg "Black-Green Tint" 0.0 0.0 1.0 0.005

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#pragma parameter blb "Black-Blue Tint" 0.0 0.0 1.0 0.005

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#if defined(VERTEX)

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#if __VERSION__ >= 130

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#define COMPAT_VARYING out

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#define COMPAT_ATTRIBUTE in

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#define COMPAT_TEXTURE texture

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#else

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#define COMPAT_VARYING varying 

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#define COMPAT_ATTRIBUTE attribute 

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#define COMPAT_TEXTURE texture2D

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#endif

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#ifdef GL_ES

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#define COMPAT_PRECISION mediump

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#else

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#define COMPAT_PRECISION

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#endif

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COMPAT_ATTRIBUTE vec4 VertexCoord;

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COMPAT_ATTRIBUTE vec4 COLOR;

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COMPAT_ATTRIBUTE vec4 TexCoord;

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COMPAT_VARYING vec4 COL0;

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COMPAT_VARYING vec4 TEX0;

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uniform mat4 MVPMatrix;

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uniform COMPAT_PRECISION int FrameDirection;

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uniform COMPAT_PRECISION int FrameCount;

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uniform COMPAT_PRECISION vec2 OutputSize;

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uniform COMPAT_PRECISION vec2 TextureSize;

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uniform COMPAT_PRECISION vec2 InputSize;

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// compatibility #defines

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#define vTexCoord TEX0.xy

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#define SourceSize vec4(TextureSize, 1.0 / TextureSize) //either TextureSize or InputSize

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#define OutSize vec4(OutputSize, 1.0 / OutputSize)

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void main()

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{

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   gl_Position = MVPMatrix * VertexCoord;

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   TEX0.xy = TexCoord.xy;

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}

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#elif defined(FRAGMENT)

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#ifdef GL_ES

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#ifdef GL_FRAGMENT_PRECISION_HIGH

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precision highp float;

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#else

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precision mediump float;

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#endif

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#define COMPAT_PRECISION mediump

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#else

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#define COMPAT_PRECISION

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#endif

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#if __VERSION__ >= 130

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#define COMPAT_VARYING in

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#define COMPAT_TEXTURE texture

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out COMPAT_PRECISION vec4 FragColor;

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#else

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#define COMPAT_VARYING varying

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#define FragColor gl_FragColor

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#define COMPAT_TEXTURE texture2D

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#endif

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uniform COMPAT_PRECISION int FrameDirection;

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uniform COMPAT_PRECISION int FrameCount;

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uniform COMPAT_PRECISION vec2 OutputSize;

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uniform COMPAT_PRECISION vec2 TextureSize;

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uniform COMPAT_PRECISION vec2 InputSize;

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uniform sampler2D Texture;

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COMPAT_VARYING vec4 TEX0;

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// compatibility #defines

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#define Source Texture

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#define vTexCoord TEX0.xy

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#define SourceSize vec4(TextureSize, 1.0 / TextureSize) //either TextureSize or InputSize

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#define OutSize vec4(OutputSize, 1.0 / OutputSize)

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#ifdef PARAMETER_UNIFORM

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uniform COMPAT_PRECISION float display_gamma;

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uniform COMPAT_PRECISION float target_gamma;

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uniform COMPAT_PRECISION float sat;

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uniform COMPAT_PRECISION float lum;

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uniform COMPAT_PRECISION float cntrst;

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uniform COMPAT_PRECISION float blr;

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uniform COMPAT_PRECISION float blg;

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uniform COMPAT_PRECISION float blb;

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uniform COMPAT_PRECISION float r;

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uniform COMPAT_PRECISION float g;

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uniform COMPAT_PRECISION float b;

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uniform COMPAT_PRECISION float rg;

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uniform COMPAT_PRECISION float rb;

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uniform COMPAT_PRECISION float gr;

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uniform COMPAT_PRECISION float gb;

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uniform COMPAT_PRECISION float br;

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uniform COMPAT_PRECISION float bg;

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uniform COMPAT_PRECISION float hotspot;

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uniform COMPAT_PRECISION float vignette;

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uniform COMPAT_PRECISION float inner;

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uniform COMPAT_PRECISION float outer;

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#else

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#define display_gamma 2.2

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#define target_gamma 2.2

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#define sat 1.0

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#define lum 1.0

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#define cntrst 1.0

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#define blr 0.0

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#define blg 0.0

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#define blb 0.0

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#define r 1.0

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#define g 1.0

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#define b 1.0

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#define rg 0.0

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#define rb 0.0

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#define gr 0.0

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#define gb 0.0

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#define br 0.0

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#define bg 0.0

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#define inner 0.0

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#define outer 1.0

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#define hotspot 1.0

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#define vignette 1.0

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#endif

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void main()

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{

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    vec3 vcolor = COMPAT_TEXTURE(Source, TEX0.xy).rgb;

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// a simple calculation for the vignette/hotspot effects

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	vec2 mid = vec2(0.49999, 0.49999) * InputSize / TextureSize;

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	vec2 middle = TEX0.xy - mid;

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	float len = length(middle);

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	float vig = smoothstep(inner, outer, len);

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	vcolor *= (vignette > 0.5) ? (1.0 - vig) : 1.0; // Vignette

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	vcolor += ((1.0 - vig) * 0.2) * hotspot; // Hotspot

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	vec4 vignetted = vec4(vcolor,1.0);

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   vec4 screen = pow(vignetted, vec4(target_gamma)).rgba;

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   vec4 avglum = vec4(0.5);

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   screen = mix(screen, avglum, (1.0 - cntrst));

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                   //  r    g    b  alpha ; alpha does nothing for our purposes

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   mat4 color = mat4(  r,  rg,  rb, 0.0,  //red tint

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                      gr,   g,  gb, 0.0,  //green tint

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                      br,  bg,   b, 0.0,  //blue tint

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                     blr, blg, blb, 0.0); //black tint

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   mat4 adjust = mat4((1.0 - sat) * 0.3086 + sat, (1.0 - sat) * 0.3086, (1.0 - sat) * 0.3086, 1.0,

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   mat4 adjust = mat4((1.0 - sat_r) * 0.2126 + sat_r, (1.0 - sat_r) * 0.2126, (1.0 - sat_r) * 0.2126, 1.0,

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                      (1.0 - sat) * 0.6094, (1.0 - sat) * 0.6094 + sat, (1.0 - sat) * 0.6094, 1.0,

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                      (1.0 - sat_g) * 0.7152, (1.0 - sat_g) * 0.7152 + sat_g, (1.0 - sat_g) * 0.7152, 1.0,

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                      (1.0 - sat) * 0.0820, (1.0 - sat) * 0.0820, (1.0 - sat) * 0.0820 + sat, 1.0,

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                      (1.0 - sat_b) * 0.0722, (1.0 - sat_b) * 0.0722, (1.0 - sat_b) * 0.0722 + sat_b, 1.0,

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                      0.0, 0.0, 0.0, 1.0);

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   color *= adjust;

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   screen = clamp(screen * lum, 0.0, 1.0);

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   screen = color * screen;

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    FragColor = pow(screen, vec4(1.0 / display_gamma));

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}

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#endif
        

    


            


                                


        

            



                
    

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