add old 3dfx shader

3dfx/shaders/old/3dfx_4x1.slangp

@@ -0,0 +1,18 @@
+shaders = 6
+shader0 = 3dfx_pass_0.slang
+shader1 = 3dfx_pass_1.slang
+shader2 = 3dfx_pass_2.slang
+shader3 = 3dfx_pass_2.slang
+shader4 = 3dfx_pass_2.slang
+shader5 = 3dfx_pass_2.slang
+
+filter_linear0 = true
+filter_linear1 = true
+filter_linear2 = true
+filter_linear3 = true
+filter_linear4 = true 
+
+scale_type_x0 = "source"
+scale_x0 = "1.000000"
+scale_type_y0 = "source"
+scale_y0 = "1.000000"

3dfx/shaders/old/3dfx_pass_0.slang

@@ -0,0 +1,147 @@
+#version 450
+
+// "LeiFX" shader - "dither" and reduction process
+// 
+// 	Copyright (C) 2013-2014 leilei
+// 
+// This program is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 2 of the License, or (at your option)
+// any later version.
+
+// This table came from the wikipedia article about Ordered Dithering. NOT MAME.  Just to clarify.
+float erroredtable[16] = {
+	16,4,13,1,   
+	8,12,5,9,
+	14,2,15,3,
+	6,10,7,11		
+};
+
+layout(push_constant) uniform Push
+{
+	vec4 SourceSize;
+	vec4 OriginalSize;
+	vec4 OutputSize;
+	uint FrameCount;
+} params;
+
+#define saturate(c) clamp(c, 0.0, 1.0)
+#define lerp(c) mix(c)
+#define mul(a,b) (b*a)
+#define fmod(c) mod(c)
+#define frac(c) fract(c)
+#define tex2D(c,d) texture(c,d)
+#define float2 vec2
+#define float3 vec3
+#define float4 vec4
+#define int2 ivec2
+#define int3 ivec3
+#define int4 ivec4
+#define bool2 bvec2
+#define bool3 bvec3
+#define bool4 bvec4
+#define float2x2 mat2x2
+#define float3x3 mat3x3
+#define float4x4 mat4x4
+
+layout(std140, set = 0, binding = 0) uniform UBO
+{
+	mat4 MVP;
+} global;
+
+#define DITHERAMOUNT		0.5f // was 0.33f
+#define DITHERBIAS		-1  // 0 to 16, biases the value of the dither up.  - was 8
+
+#pragma stage vertex
+layout(location = 0) in vec4 Position;
+layout(location = 1) in vec2 TexCoord;
+layout(location = 0) out vec2 vTexCoord;
+
+void main()
+{
+   gl_Position = global.MVP * Position;
+   vTexCoord = TexCoord;
+}
+
+#pragma stage fragment
+layout(location = 0) in vec2 vTexCoord;
+layout(location = 0) out vec4 FragColor;
+layout(set = 0, binding = 2) uniform sampler2D Source;
+
+void main()
+{
+	float2 res;
+	float3 outcolor = tex2D(Source, vTexCoord).rgb;
+	res.x = params.SourceSize.x;
+	res.y = params.SourceSize.y;
+	
+	float2 ditheu = vTexCoord.xy * res.xy;
+
+	ditheu.x = vTexCoord.x * res.x;
+	ditheu.y = vTexCoord.y * res.y;
+
+	// Dither. Total rewrite.
+	// NOW, WHAT PIXEL AM I!??
+
+	int ditdex = 	int(mod(ditheu.x, 4.0)) * 4 + int(mod(ditheu.y, 4.0)); // 4x4!
+	vec3 color;
+	vec3 colord;
+	color.r = outcolor.r * 255;
+	color.g = outcolor.g * 255;
+	color.b = outcolor.b * 255;
+	float yeh = 0.0;
+	float ohyes = 0.0;
+	
+//	for (yeh=ditdex; yeh<(ditdex+16); yeh++) ohyes = pow(erroredtable[yeh-15], 0.72f);
+	if (yeh++==ditdex) ohyes = erroredtable[0];
+	else if (yeh++==ditdex) ohyes = erroredtable[1];
+	else if (yeh++==ditdex) ohyes = erroredtable[2];
+	else if (yeh++==ditdex) ohyes = erroredtable[3];
+	else if (yeh++==ditdex) ohyes = erroredtable[4];
+	else if (yeh++==ditdex) ohyes = erroredtable[5];
+	else if (yeh++==ditdex) ohyes = erroredtable[6];
+	else if (yeh++==ditdex) ohyes = erroredtable[7];
+	else if (yeh++==ditdex) ohyes = erroredtable[8];
+	else if (yeh++==ditdex) ohyes = erroredtable[9];
+	else if (yeh++==ditdex) ohyes = erroredtable[10];
+	else if (yeh++==ditdex) ohyes = erroredtable[11];
+	else if (yeh++==ditdex) ohyes = erroredtable[12];
+	else if (yeh++==ditdex) ohyes = erroredtable[13];
+	else if (yeh++==ditdex) ohyes = erroredtable[14];
+	else if (yeh++==ditdex) ohyes = erroredtable[15];
+
+	colord.r = color.r + ohyes;
+	colord.g = color.g + (ohyes / 2);
+	colord.b = color.b + ohyes;
+	outcolor.rgb = colord.rgb * 0.003921568627451; // divide by 255, i don't trust em
+	
+	//
+	// Reduce to 16-bit color
+	//
+
+	float3 why = float3(1.0);
+	float3 reduceme = float3(1.0);
+	float radooct = 32;	// 32 is usually the proper value
+
+	reduceme.r = pow(outcolor.r, why.r);  
+	reduceme.r *= radooct;	
+	reduceme.r = int(floor(reduceme.r));	
+	reduceme.r /= radooct; 
+	reduceme.r = pow(reduceme.r, why.r);
+
+	reduceme.g = pow(outcolor.g, why.g);  
+	reduceme.g *= radooct * 2;	
+	reduceme.g = int(floor(reduceme.g));	
+	reduceme.g /= radooct * 2; 
+	reduceme.g = pow(reduceme.g, why.g);
+
+	reduceme.b = pow(outcolor.b, why.b);  
+	reduceme.b *= radooct;	
+	reduceme.b = int(floor(reduceme.b));	
+	reduceme.b /= radooct; 
+	reduceme.b = pow(reduceme.b, why.b);
+
+	outcolor.rgb = reduceme.rgb;
+
+   FragColor = vec4(outcolor, 1.0);
+}

3dfx/shaders/old/3dfx_pass_1.slang

@@ -0,0 +1,92 @@
+#version 450
+
+// "LeiFX" shader - Gamma process
+// 
+// 	Copyright (C) 2013-2014 leilei
+// 
+// This program is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 2 of the License, or (at your option)
+// any later version.
+
+layout(push_constant) uniform Push
+{
+	vec4 SourceSize;
+	vec4 OriginalSize;
+	vec4 OutputSize;
+	uint FrameCount;
+} params;
+
+layout(std140, set = 0, binding = 0) uniform UBO
+{
+	mat4 MVP;
+} global;
+
+#define saturate(c) clamp(c, 0.0, 1.0)
+#define lerp(c) mix(c)
+#define mul(a,b) (b*a)
+#define fmod(c) mod(c)
+#define frac(c) fract(c)
+#define tex2D(c,d) texture(c,d)
+#define float2 vec2
+#define float3 vec3
+#define float4 vec4
+#define int2 ivec2
+#define int3 ivec3
+#define int4 ivec4
+#define bool2 bvec2
+#define bool3 bvec3
+#define bool4 bvec4
+#define float2x2 mat2x2
+#define float3x3 mat3x3
+#define float4x4 mat4x4
+
+float mod2(float x, float y)
+{
+	return x - y * floor (x/y);
+}
+
+#pragma stage vertex
+layout(location = 0) in vec4 Position;
+layout(location = 1) in vec2 TexCoord;
+layout(location = 0) out vec2 vTexCoord;
+
+void main()
+{
+   gl_Position = global.MVP * Position;
+   vTexCoord = TexCoord;
+}
+
+#pragma stage fragment
+layout(location = 0) in vec2 vTexCoord;
+layout(location = 0) out vec4 FragColor;
+layout(set = 0, binding = 2) uniform sampler2D Source;
+
+void main()
+{
+	float3 outcolor = tex2D(Source, vTexCoord).rgb;
+	
+	float2 res;
+	res.x = params.SourceSize.x;
+	res.y = params.SourceSize.y;
+
+	// Gamma scanlines
+	// the Voodoo drivers usually supply a 1.3 gamma setting whether people liked it or not
+	// but it was enough to brainwash the competition for looking 'too dark'
+
+	float gammaed = 0.15;
+
+	float leifx_linegamma = gammaed;
+	float2 dithet = vTexCoord.xy * res.xy;
+	dithet.y = vTexCoord.y * res.y;
+	float horzline1 = 	(mod2(dithet.y, 	2.0));
+	if (horzline1 < 1)	leifx_linegamma = 0;
+	float leifx_gamma = 1.3 - gammaed + leifx_linegamma;
+
+
+	outcolor.r = pow(outcolor.r, 1.0 / leifx_gamma);
+	outcolor.g = pow(outcolor.g, 1.0 / leifx_gamma);
+	outcolor.b = pow(outcolor.b, 1.0 / leifx_gamma);
+	
+   FragColor = vec4(outcolor, 1.0);
+}

3dfx/shaders/old/3dfx_pass_2.slang

@@ -0,0 +1,114 @@
+#version 450
+
+
+// "LeiFX" shader - Pixel filtering process
+// 
+// 	Copyright (C) 2013-2014 leilei
+// 
+// This program is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 2 of the License, or (at your option)
+// any later version.
+
+layout(push_constant) uniform Push
+{
+	vec4 SourceSize;
+	vec4 OriginalSize;
+	vec4 OutputSize;
+	uint FrameCount;
+	float LEIFX_BLURFACTOR;
+} params;
+
+#pragma parameter LEIFX_BLURFACTOR "LeiFX Blur Factor" 0.69 0.00 1.00 0.01
+
+#define LEIFX_BLURFACTOR params.LEIFX_BLURFACTOR
+
+layout(std140, set = 0, binding = 0) uniform UBO
+{
+	mat4 MVP;
+} global;
+
+#define saturate(c) clamp(c, 0.0, 1.0)
+#define lerp(c) mix(c)
+#define mul(a,b) (b*a)
+#define fmod(c) mod(c)
+#define frac(c) fract(c)
+#define tex2D(c,d) texture(c,d)
+#define float2 vec2
+#define float3 vec3
+#define float4 vec4
+#define int2 ivec2
+#define int3 ivec3
+#define int4 ivec4
+#define bool2 bvec2
+#define bool3 bvec3
+#define bool4 bvec4
+#define float2x2 mat2x2
+#define float3x3 mat3x3
+#define float4x4 mat4x4
+
+#pragma stage vertex
+layout(location = 0) in vec4 Position;
+layout(location = 1) in vec2 TexCoord;
+layout(location = 0) out vec2 vTexCoord;
+
+void main()
+{
+   gl_Position = global.MVP * Position;
+   vTexCoord = TexCoord;
+}
+
+#pragma stage fragment
+layout(location = 0) in vec2 vTexCoord;
+layout(location = 0) out vec4 FragColor;
+layout(set = 0, binding = 2) uniform sampler2D Source;
+
+void main()
+{
+	float3 outcolor = tex2D(Source, vTexCoord).rgb;
+	
+	float2 pixel;
+
+	pixel.x = params.SourceSize.z;
+	pixel.y = params.SourceSize.w;
+
+	// Sample things.
+
+	float blendy;	// to blend unblended with blend... trying to smooth the jag :(
+	float blenda;	
+
+	float blendfactor;
+
+	float3 pixel1 = tex2D(Source, vTexCoord + float2((pixel.x * 0.15), 0)).rgb;
+	float3 pixel2 = tex2D(Source, vTexCoord + float2(-pixel.x * 0.22, 0)).rgb;
+	float3 pixel0 = tex2D(Source, vTexCoord + float2(0, 0)).rgb;
+
+	float3 pixelblend;
+
+
+	float gary1 = dot(pixel1.rgb,float3(1.0));
+	float gary2 = dot(pixel2.rgb,float3(1.0));
+
+	float mean = 1.0;
+	mean = gary1 - gary2;
+
+	if (mean < 0)	mean *= -1;
+	if (mean > 1) mean = 1;	
+	mean = pow(mean, LEIFX_BLURFACTOR);	
+
+	if (mean > 1)
+      mean = 1;	
+
+	{
+		// variably BLEND IT ALL TO H*CK!!!!
+		blendy = 1 - mean;
+		blenda = 1 - blendy;
+		pixel0 /= 3;
+		pixel1 /= 3;
+		pixel2 /= 3;
+   		pixelblend.rgb = pixel0 + pixel1 + pixel2;
+		outcolor.rgb = (pixelblend.rgb * blendy) + (outcolor.rgb * blenda);
+	}
+	
+   FragColor = vec4(outcolor, 1.0);
+}