From b778a6b7cb857e2576c3c6016678a2f5c22761f3 Mon Sep 17 00:00:00 2001 From: hunterk Date: Wed, 18 Dec 2019 16:21:01 -0600 Subject: [PATCH] make res-independent scanlines a little thinner and adjustable brightness --- scanlines/shaders/res-independent-scanlines.slang | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/scanlines/shaders/res-independent-scanlines.slang b/scanlines/shaders/res-independent-scanlines.slang index d2b5ae9..f18dc89 100644 --- a/scanlines/shaders/res-independent-scanlines.slang +++ b/scanlines/shaders/res-independent-scanlines.slang @@ -1,5 +1,11 @@ #version 450 +/* + based on scanline shader by: + Author: Themaister + License: Public domain +*/ + layout(push_constant) uniform Push { vec4 SourceSize; @@ -48,8 +54,7 @@ void main() { vec2 sine_comp = vec2(0.0, SCANLINE_SINE_COMP_B); vec3 res = texture(Source, vTexCoord).xyz; - vec2 fragcoord = vTexCoord.xy * params.FinalViewportSize.xy; - // picked 224 here as a magic number because it's a common 240p res and therefore a good starting point - vec3 scanline = res * ((1. - 0.75 * SCANLINE_SINE_COMP_B) + dot(sine_comp * sin((fragcoord / (224. * scanline_size)) * omega), vec2(1.0, 1.0))); + vec2 fragcoord = fract(floor(vTexCoord.xy * params.OutputSize.xy * 1.0001) / scanline_size); + vec3 scanline = (fragcoord.y > 0.3333)? res : vec3(SCANLINE_SINE_COMP_B * res);//res * ((1. - 0.75 * SCANLINE_SINE_COMP_B) + dot(sine_comp * sin((fragcoord / scanline_size) * omega), vec2(1.0, 1.0))); FragColor = vec4(scanline.x, scanline.y, scanline.z, 1.0); }