mirror of
https://github.com/italicsjenga/slang-shaders.git
synced 2024-11-23 00:01:31 +11:00
42 lines
1.2 KiB
Plaintext
42 lines
1.2 KiB
Plaintext
#version 450
|
|
#pragma name phosphor
|
|
|
|
#include "geom-deluxe-params.inc"
|
|
|
|
#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 * 1.0001;
|
|
}
|
|
|
|
#pragma stage fragment
|
|
layout(location = 0) in vec2 vTexCoord;
|
|
layout(location = 0) out vec4 FragColor;
|
|
layout(set = 0, binding = 2) uniform sampler2D Source;
|
|
layout(set = 0, binding = 3) uniform sampler2D phosphorFeedback;
|
|
|
|
void main()
|
|
{
|
|
vec4 screen = texture(Source, vTexCoord);
|
|
vec4 phosphor = texture(phosphorFeedback, vTexCoord);
|
|
|
|
vec3 lum = vec3(0.299,0.587,0.114);
|
|
float bscrn = dot(pow(screen.rgb,vec3(gamma)),lum);
|
|
float bphos = dot(pow(phosphor.rgb,vec3(gamma)),lum);
|
|
// encode the upper 2 bits of the time elapsed in the lower 2 bits of b
|
|
float t = 1.0 + 255.0*phosphor.a + fract(phosphor.b*255.0/4.0)*1024.0;
|
|
|
|
bphos = ( t > 1023.0 ? 0.0 : bphos*pow(t,-phosphor_power) );
|
|
|
|
FragColor = ( bscrn >= bphos ?
|
|
vec4(screen.rg,floor(screen.b*255.0/4.0)*4.0/255.0,1.0/255.0)
|
|
: vec4(phosphor.rg,
|
|
(floor(phosphor.b*255.0/4.0)*4.0 + floor(t/256.0))/255.0,
|
|
fract(t/256.0)*256.0/255.0 ) );
|
|
}
|