mirror of
https://github.com/italicsjenga/slang-shaders.git
synced 2024-11-30 11:21:32 +11:00
328 lines
10 KiB
Plaintext
328 lines
10 KiB
Plaintext
#version 450
|
|
|
|
/*
|
|
CRT - Guest - Dr. Venom - Pass2
|
|
|
|
Copyright (C) 2018-2019 guest(r) - guest.r@gmail.com
|
|
|
|
Incorporates many good ideas and suggestions from Dr. Venom.
|
|
|
|
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 program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
|
|
layout(push_constant) uniform Push
|
|
{
|
|
float brightboost, IOS, gsl, scanline1, scanline2, beam_min, beam_max, s_power, beam_size, shadowMask,
|
|
masksize, vertmask, slotmask, slotwidth, double_slot, mcut, maskDark, maskLight, CGWG, gamma_out;
|
|
} params;
|
|
|
|
#pragma parameter brightboost "Bright boost" 1.30 0.50 2.00 0.01
|
|
#define brightboost params.brightboost // adjust brightness
|
|
#pragma parameter IOS "Smart Y Integer Scaling" 0.0 0.0 1.0 1.0
|
|
#define IOS params.IOS // smart integer scaling
|
|
#pragma parameter gsl "Scanline Type" 1.0 0.0 2.0 1.0
|
|
#define gsl params.gsl // Alternate scanlines
|
|
#pragma parameter scanline1 "Scanline beam shape low" 8.0 1.0 15.0 1.0
|
|
#define scanline1 params.scanline1 // scanline param, vertical sharpness
|
|
#pragma parameter scanline2 "Scanline beam shape high" 8.0 5.0 23.0 1.0
|
|
#define scanline2 params.scanline2 // scanline param, vertical sharpness
|
|
#pragma parameter beam_min "Scanline dark" 1.25 0.5 2.0 0.05
|
|
#define beam_min params.beam_min // dark area beam min - narrow
|
|
#pragma parameter beam_max "Scanline bright" 1.05 0.5 2.0 0.05
|
|
#define beam_max params.beam_max // bright area beam max - wide
|
|
#pragma parameter s_power "Scanline intensity" 1.0 0.5 2.5 0.05
|
|
#define s_power params.s_power // scanline intensity
|
|
#pragma parameter beam_size "Increased bright scanline beam" 0.65 0.0 1.0 0.05
|
|
#define beam_size params.beam_size // increased max. beam size
|
|
#pragma parameter shadowMask "CRT Mask: 0:CGWG, 1-4:Lottes, 5-6:'Trinitron'" 5.0 -1.0 6.0 1.0
|
|
#define shadowMask params.shadowMask // Mask Style
|
|
#pragma parameter masksize "CRT Mask Size (2.0 is nice in 4k)" 1.0 1.0 2.0 1.0
|
|
#define masksize params.masksize // Mask Size
|
|
#pragma parameter vertmask "PVM Like Colors" 0.05 0.0 0.25 0.01
|
|
#define vertmask params.vertmask // Vertical mask
|
|
#pragma parameter slotmask "Slot Mask Strength" 0.0 0.0 1.0 0.05
|
|
#define slotmask params.slotmask // Slot Mask ON/OFF
|
|
#pragma parameter slotwidth "Slot Mask Width" 2.0 2.0 6.0 0.5
|
|
#define slotwidth params.slotwidth // Slot Mask Width
|
|
#pragma parameter double_slot "Slot Mask Height: 2x1 or 4x1" 1.0 1.0 2.0 1.0
|
|
#define double_slot params.double_slot // Slot Mask Height
|
|
#pragma parameter mcut "Mask 5&6 cutoff" 0.2 0.0 0.5 0.05
|
|
#define mcut params.mcut // Mask 5&6 cutoff
|
|
#pragma parameter maskDark "Mask Dark" 0.5 0.0 2.0 0.05
|
|
#define maskDark params.maskDark // Dark "Phosphor"
|
|
#pragma parameter maskLight "Mask Light" 1.5 0.0 2.0 0.05
|
|
#define maskLight params.maskLight // Light "Phosphor"
|
|
#pragma parameter CGWG "CGWG Mask Str." 0.3 0.0 1.0 0.05
|
|
#define CGWG params.CGWG // CGWG Mask Strength
|
|
#pragma parameter gamma_out "Gamma out" 2.4 1.0 3.5 0.05
|
|
#define gamma_out params.gamma_out // output gamma
|
|
|
|
layout(std140, set = 0, binding = 0) uniform UBO
|
|
{
|
|
mat4 MVP;
|
|
vec4 SourceSize;
|
|
vec4 OutputSize;
|
|
uint FrameCount;
|
|
} global;
|
|
|
|
#define SourceSize global.SourceSize
|
|
#define OutputSize global.OutputSize
|
|
#define FrameCount global.FrameCount
|
|
|
|
#define COMPAT_TEXTURE(c,d) texture(c,d)
|
|
#define gl_FragCoord (vTexCoord.xy * OutputSize.xy)
|
|
#define InputSize SourceSize
|
|
|
|
#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 * 1.00001;
|
|
}
|
|
|
|
#pragma stage fragment
|
|
layout(location = 0) in vec2 vTexCoord;
|
|
layout(location = 0) out vec4 FragColor;
|
|
layout(set = 0, binding = 2) uniform sampler2D Source;
|
|
|
|
#define eps 1e-10
|
|
|
|
float st(float x, float scanline)
|
|
{
|
|
return exp2(-scanline*x*x);
|
|
}
|
|
|
|
vec3 sw0(vec3 x, vec3 color, float scanline)
|
|
{
|
|
vec3 tmp = mix(vec3(beam_min),vec3(beam_max), color);
|
|
vec3 ex = x*tmp;
|
|
return exp2(-scanline*ex*ex);
|
|
}
|
|
|
|
vec3 sw1(vec3 x, vec3 color, float scanline)
|
|
{
|
|
float mx = max(max(color.r, color.g),color.b);
|
|
x = mix (x, beam_min*x, max(x-0.4*mx,0.0));
|
|
vec3 tmp = mix(vec3(1.2*beam_min),vec3(beam_max), color);
|
|
vec3 ex = x*tmp;
|
|
float br = clamp(0.8*beam_min - 1.0, 0.2, 0.45);
|
|
return exp2(-scanline*ex*ex)/(1.0-br+br*color);
|
|
}
|
|
|
|
vec3 sw2(vec3 x, vec3 color, float scanline)
|
|
{
|
|
vec3 tmp = mix(vec3(2.75*beam_min),vec3(beam_max), color);
|
|
tmp = mix(vec3(beam_max), tmp, pow(x, vec3(max(max(color.r, color.g),color.b)+0.3)));
|
|
vec3 ex = x*tmp;
|
|
return exp2(-scanline*ex*ex)/(0.6 + 0.4*color);
|
|
}
|
|
|
|
// Shadow mask (1-4 from PD CRT Lottes shader).
|
|
vec3 Mask(vec2 pos, vec3 c)
|
|
{
|
|
pos = floor(pos/masksize);
|
|
vec3 mask = vec3(maskDark, maskDark, maskDark);
|
|
|
|
|
|
// No mask
|
|
if (shadowMask == -1.0)
|
|
{
|
|
mask = vec3(1.0);
|
|
}
|
|
|
|
// Phosphor.
|
|
else if (shadowMask == 0.0)
|
|
{
|
|
pos.x = fract(pos.x*0.5);
|
|
float mc = 1.0 - CGWG;
|
|
if (pos.x < 0.5) { mask.r = 1.1; mask.g = mc; mask.b = 1.1; }
|
|
else { mask.r = mc; mask.g = 1.1; mask.b = mc; }
|
|
}
|
|
|
|
// Very compressed TV style shadow mask.
|
|
else if (shadowMask == 1.0)
|
|
{
|
|
float line = maskLight;
|
|
float odd = 0.0;
|
|
|
|
if (fract(pos.x/6.0) < 0.5)
|
|
odd = 1.0;
|
|
if (fract((pos.y + odd)/2.0) < 0.5)
|
|
line = maskDark;
|
|
|
|
pos.x = fract(pos.x/3.0);
|
|
|
|
if (pos.x < 0.333) mask.r = maskLight;
|
|
else if (pos.x < 0.666) mask.g = maskLight;
|
|
else mask.b = maskLight;
|
|
|
|
mask*=line;
|
|
}
|
|
|
|
// Aperture-grille.
|
|
else if (shadowMask == 2.0)
|
|
{
|
|
pos.x = fract(pos.x/3.0);
|
|
|
|
if (pos.x < 0.333) mask.r = maskLight;
|
|
else if (pos.x < 0.666) mask.g = maskLight;
|
|
else mask.b = maskLight;
|
|
}
|
|
|
|
// Stretched VGA style shadow mask (same as prior shaders).
|
|
else if (shadowMask == 3.0)
|
|
{
|
|
pos.x += pos.y*3.0;
|
|
pos.x = fract(pos.x/6.0);
|
|
|
|
if (pos.x < 0.333) mask.r = maskLight;
|
|
else if (pos.x < 0.666) mask.g = maskLight;
|
|
else mask.b = maskLight;
|
|
}
|
|
|
|
// VGA style shadow mask.
|
|
else if (shadowMask == 4.0)
|
|
{
|
|
pos.xy = floor(pos.xy*vec2(1.0, 0.5));
|
|
pos.x += pos.y*3.0;
|
|
pos.x = fract(pos.x/6.0);
|
|
|
|
if (pos.x < 0.333) mask.r = maskLight;
|
|
else if (pos.x < 0.666) mask.g = maskLight;
|
|
else mask.b = maskLight;
|
|
}
|
|
|
|
// Alternate mask 5
|
|
else if (shadowMask == 5.0)
|
|
{
|
|
float mx = max(max(c.r,c.g),c.b);
|
|
vec3 maskTmp = vec3( min( 1.25*max(mx-mcut,0.0)/(1.0-mcut) ,maskDark + 0.2*(1.0-maskDark)*mx));
|
|
float adj = 0.80*maskLight - 0.5*(0.80*maskLight - 1.0)*mx + 0.75*(1.0-mx);
|
|
mask = maskTmp;
|
|
pos.x = fract(pos.x/2.0);
|
|
if (pos.x < 0.5)
|
|
{ mask.r = adj;
|
|
mask.b = adj;
|
|
}
|
|
else mask.g = adj;
|
|
}
|
|
|
|
// Alternate mask 6
|
|
else if (shadowMask == 6.0)
|
|
{
|
|
float mx = max(max(c.r,c.g),c.b);
|
|
vec3 maskTmp = vec3( min( 1.5*max(mx-mcut,0.0)/(1.0-mcut) ,maskDark + 0.225*(1.0-maskDark)*mx));
|
|
float adj = 0.80*maskLight - 0.5*(0.80*maskLight - 1.0)*mx + 0.75*(1.0-mx);
|
|
mask = maskTmp;
|
|
pos.x = fract(pos.x/3.0);
|
|
if (pos.x < 0.333) mask.r = adj;
|
|
else if (pos.x < 0.666) mask.g = adj;
|
|
else mask.b = adj;
|
|
}
|
|
|
|
return mask;
|
|
}
|
|
|
|
float SlotMask(vec2 pos, vec3 c)
|
|
{
|
|
if (slotmask == 0.0) return 1.0;
|
|
|
|
float mx = pow(max(max(c.r,c.g),c.b),1.33);
|
|
float mlen = slotwidth*2.0;
|
|
float px = fract(pos.x/mlen);
|
|
float py = floor(fract(pos.y/(2.0*double_slot))*2.0*double_slot);
|
|
float slot_dark = mix(1.0-slotmask, 1.0-0.80*slotmask, mx);
|
|
float slot = 1.0 + 0.7*slotmask*(1.0-mx);
|
|
if (py == 0.0 && px < 0.5) slot = slot_dark; else
|
|
if (py == double_slot && px >= 0.5) slot = slot_dark;
|
|
|
|
return slot;
|
|
}
|
|
|
|
float Overscan2(float pos, float dy){
|
|
pos=pos*2.0-1.0;
|
|
pos*=dy;
|
|
return pos*0.5+0.5;
|
|
}
|
|
|
|
void main()
|
|
{
|
|
vec2 texcoord = vTexCoord;
|
|
|
|
if (IOS == 1.0){
|
|
float ofactor = OutputSize.y/InputSize.y;
|
|
float intfactor = round(ofactor);
|
|
float diff = ofactor/intfactor;
|
|
texcoord.y = Overscan2(texcoord.y*(SourceSize.y/InputSize.y), diff)*(InputSize.y/SourceSize.y);
|
|
}
|
|
|
|
vec2 ps = SourceSize.zw;
|
|
vec2 OGL2Pos = texcoord * SourceSize.xy - vec2(0.0,0.5);
|
|
vec2 fp = fract(OGL2Pos);
|
|
vec2 dx = vec2(ps.x,0.0);
|
|
vec2 dy = vec2(0.0, ps.y);
|
|
|
|
vec2 pC4 = floor(OGL2Pos) * ps + 0.5*ps;
|
|
|
|
vec3 color1 = COMPAT_TEXTURE(Source, pC4 ).xyz;
|
|
vec3 color2 = COMPAT_TEXTURE(Source, pC4 +dy).xyz;
|
|
|
|
// calculating scanlines
|
|
|
|
float f = fp.y;
|
|
float shape1 = mix(scanline1, scanline2, f);
|
|
float shape2 = mix(scanline1, scanline2, 1.0-f);
|
|
|
|
float wt1 = st(f, shape1);
|
|
float wt2 = st(1.0-f, shape2);
|
|
vec3 color0 = color1*wt1 + color2*wt2;
|
|
vec3 ctmp = color0/(wt1+wt2);
|
|
vec3 tmp = pow(ctmp, vec3(1.0/gamma_out));
|
|
|
|
vec3 w1,w2 = vec3(0.0);
|
|
|
|
vec3 cref1 = mix(ctmp, color1, beam_size);
|
|
vec3 cref2 = mix(ctmp, color2, beam_size);
|
|
|
|
vec3 shift = vec3(-vertmask, vertmask, -vertmask);
|
|
|
|
vec3 f1 = clamp(vec3(f) + shift*0.5*(1.0+f), 0.0, 1.0);
|
|
vec3 f2 = clamp(vec3(1.0-f) - shift*0.5*(2.0-f), 0.0, 1.0);
|
|
|
|
if (gsl == 0.0) { w1 = sw0(f1,cref1,shape1); w2 = sw0(f2,cref2,shape2);} else
|
|
if (gsl == 1.0) { w1 = sw1(f1,cref1,shape1); w2 = sw1(f2,cref2,shape2);} else
|
|
if (gsl == 2.0) { w1 = sw2(f1,cref1,shape1); w2 = sw2(f2,cref2,shape2);}
|
|
|
|
vec3 color = color1*pow(w1, vec3(s_power)) + color2*pow(w2, vec3(s_power));
|
|
|
|
color*=brightboost;
|
|
color = min(color, 1.0);
|
|
|
|
// Apply Mask
|
|
|
|
color *= Mask(gl_FragCoord.xy * 1.000001,tmp);
|
|
|
|
color = min(color,1.0);
|
|
|
|
color *= SlotMask(gl_FragCoord.xy * 1.000001,tmp);
|
|
|
|
color = pow(color, vec3(1.0/gamma_out));
|
|
FragColor = vec4(color, 1.0);
|
|
} |