Add simplified/faster newpixie version.

crt/newpixie-mini.slangp

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+shaders = 1
+
+shader0 = shaders/newpixie-mini/newpixie-mini.slang
+filter_linear1 = true

crt/shaders/newpixie-mini/newpixie-mini.slang

@@ -0,0 +1,168 @@
+#version 450
+
+// newpixie CRT
+// by Mattias Gustavsson
+// adapted for slang by hunterk
+
+/*
+------------------------------------------------------------------------------
+This software is available under 2 licenses - you may choose the one you like.
+------------------------------------------------------------------------------
+ALTERNATIVE A - MIT License
+Copyright (c) 2016 Mattias Gustavsson
+Permission is hereby granted, free of charge, to any person obtaining a copy of 
+this software and associated documentation files (the "Software"), to deal in 
+the Software without restriction, including without limitation the rights to 
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 
+of the Software, and to permit persons to whom the Software is furnished to do 
+so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in all 
+copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
+SOFTWARE.
+------------------------------------------------------------------------------
+ALTERNATIVE B - Public Domain (www.unlicense.org)
+This is free and unencumbered software released into the public domain.
+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this 
+software, either in source code form or as a compiled binary, for any purpose, 
+commercial or non-commercial, and by any means.
+In jurisdictions that recognize copyright laws, the author or authors of this 
+software dedicate any and all copyright interest in the software to the public 
+domain. We make this dedication for the benefit of the public at large and to 
+the detriment of our heirs and successors. We intend this dedication to be an 
+overt act of relinquishment in perpetuity of all present and future rights to 
+this software under copyright law.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+------------------------------------------------------------------------------
+*/
+
+layout(push_constant) uniform Push
+{
+	vec4 SourceSize;
+	vec4 OutputSize;
+	float curvature;
+	float vignette;
+} params;
+
+#pragma parameter curvature "Curvature" 2.0 0.0001 4.0 0.25
+#pragma parameter vignette "Vignette" 1.0 0.0 1.0 0.05
+
+#define gl_FragCoord (vTexCoord.xy * params.OutputSize.xy)
+
+layout(std140, set = 0, binding = 0) uniform UBO
+{
+	mat4 MVP;
+} global;
+
+#pragma stage vertex
+layout(location = 0) in vec4 Position;
+layout(location = 1) in vec2 TexCoord;
+layout(location = 0) out vec2 vTexCoord;
+
+void main()
+{
+   vec4 modpos = vec4(Position.x, 1.-Position.y, Position.z, Position.w);
+   gl_Position = global.MVP * modpos;
+   vTexCoord = TexCoord;
+}
+
+#pragma stage fragment
+layout(location = 0) in vec2 vTexCoord;
+layout(location = 0) out vec4 FragColor;
+layout(set = 0, binding = 3) uniform sampler2D Source;
+
+vec3 tsample( sampler2D samp, vec2 tc, float offs, vec2 resolution )
+    {
+    tc = tc * vec2(1.025, 0.92) + vec2(-0.0125, 0.04);
+    vec3 s = pow( abs( texture( samp, vec2( tc.x, 1.0-tc.y ) ).rgb), vec3( 2.2 ) );
+    return s*vec3(1.25);
+    }
+		
+vec3 filmic( vec3 LinearColor )
+    {
+    vec3 x = max( vec3(0.0), LinearColor-vec3(0.004));
+    return (x*(6.2*x+0.5))/(x*(6.2*x+1.7)+0.06);
+    }
+		
+vec2 curve( vec2 uv )
+    {
+    uv = (uv - 0.5);// * 2.0;
+//    uv.x *= 0.75;
+    uv *= vec2(0.925, 1.095);  
+   uv *= params.curvature;
+    uv.x *= 1.0 + pow((abs(uv.y) / 4.0), 2.0);
+    uv.y *= 1.0 + pow((abs(uv.x) / 3.0), 2.0);
+    uv /= params.curvature;
+    uv  += 0.5;
+    uv =  uv *0.92 + 0.04;
+    return uv;
+    }
+		
+float rand(vec2 co)
+    {
+    return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453);
+    }
+    
+#define resolution params.OutputSize.xy
+
+void main()
+{
+    vec2 uv = vTexCoord.xy;
+    /* Curve */
+    vec2 curved_uv = mix( curve( uv ), uv, 0.4 );
+    float scale = -0.101;
+    vec2 scuv = curved_uv*(1.0-scale)+scale/2.0+vec2(0.003, -0.001);
+    
+    uv = scuv;
+		
+    /* Main color, Bleed */
+    vec3 col;
+
+    float x = 0;
+    float o =sin(gl_FragCoord.y*1.5)/resolution.x;
+    x+=o*0.25;
+
+    col.r = tsample(Source,vec2(x+scuv.x+0.0009,scuv.y+0.0009),resolution.y/800.0, resolution ).x+0.02;
+    col.g = tsample(Source,vec2(x+scuv.x+0.0000,scuv.y-0.0011),resolution.y/800.0, resolution ).y+0.02;
+    col.b = tsample(Source,vec2(x+scuv.x-0.0015,scuv.y+0.0000),resolution.y/800.0, resolution ).z+0.02;
+
+    float i = clamp(col.r*0.299 + col.g*0.587 + col.b*0.114, 0.0, 1.0 );
+    i = pow( 1.0 - pow(i,2.0), 1.0 );
+    i = (1.0-i) * 0.85 + 0.15; 
+    
+    /* Level adjustment (curves) */
+    col *= vec3(0.95,1.05,0.95);
+    col = clamp(col*1.3 + 0.75*col*col + 1.25*col*col*col*col*col,vec3(0.0),vec3(10.0));
+
+    /* Vignette. Increase the 6.0 factor for greater burnout effect in the center of the screen. */
+    float vig = ((1.0-0.99*params.vignette) + 1.0*6.0*curved_uv.x*curved_uv.y*(1.0-curved_uv.x)*(1.0-curved_uv.y));
+    vig = 1.3*pow(vig,0.5);
+    col *= vig;
+    /* Compensate the lack of vignette, in case we decide to comment it out for performance reasons */
+    //col *= 0.6;
+
+    /* Scanlines */
+    float scans = clamp( 0.35+0.18*sin(curved_uv.y*resolution.y*1.5), 0.0, 1.0);
+    float s = pow(scans,0.9);
+    col = col * vec3(s);
+		
+    /* Vertical lines (shadow mask) */
+    col*=1.0-0.23*(clamp((mod(gl_FragCoord.xy.x, 3.0))/2.0,0.0,1.0));
+		
+    /* Tone map */
+    col = filmic( col );
+		
+    uv = curved_uv;
+
+    FragColor = vec4( col, 1.0 );
+}