slang-shaders/vhs/shaders/VHSPro/VHSPro_LastFrame.slang

#version 450

layout(push_constant) uniform Push
{
	vec4 SourceSize;
	vec4 OriginalSize;
	vec4 OutputSize;
	uint FrameCount;
} params;

#define SamplerColorVHS second
#define _FeedbackTex Source

#include "VHSPro_params.inc"
#include "VHSPro_constants.inc"

#pragma stage vertex
layout(location = 0) in vec4 Position;
layout(location = 1) in vec2 TexCoord;
layout(location = 0) out vec2 texcoord;

void main()
{
   gl_Position = global.MVP * Position;
   texcoord = TexCoord;
}

#pragma stage fragment
layout(location = 0) in vec2 texcoord;
layout(location = 0) out vec4 FragColor;
layout(set = 0, binding = 2) uniform sampler2D Source;
layout(set = 0, binding = 3) uniform sampler2D second;

#include "VHSPro_functions.inc"

void main()
{
    vec3 col = texture( SamplerColorVHS, texcoord).rgb; //curent frame
    const vec3 fbb = texture( _FeedbackTex, texcoord).rgb; //feedback buffer
    
    if (VHS_Feedback){
        col = bm_screen(col, fbb*feedbackAmp);
        if (feedbackDebug){
            col = fbb;
        }
    }
                   
    FragColor = vec4(col, 1.0); 
}