initial implementation for scanlines

README.md

@@ -11,6 +11,8 @@ aimed at providing a variety of effects in the vein of its parent project.
 - Dithering
 - Downscaling
 - Horizontal Blur
+- Interlacing
+- Scanlines
 - Screen-Space Vertex Warping
 - Affine Texture Warping
 - World Curvature

shaders/final.fsh

@@ -4,6 +4,7 @@
 
 //#define aberration
 //#define hBlur
+//#define scanlines
 
 varying vec2 texcoord;
 
@@ -25,6 +26,13 @@ void main() {
 		color.rb = aberrate().rb;
 	#endif
 
+	#ifdef scanlines
+		if(mod(int(gl_FragCoord.y / (pixelSize * 2)), 2) == 0)
+			color.rgb *= 0.95;
+		else
+			color.rgb /= 0.95;
+	#endif
+
 	gl_FragData[0] = vec4(color, 1);
 }
 

shaders/lang/en_US.lang

@@ -25,6 +25,7 @@ option.valSteps=Value Depth
 
 screen.SCREEN=Screen
 option.interlacing=Interlacing
+option.scanlines=Scanlines
 option.aberration=Chromatic Aberration
 
 screen.CONSOLE=Consoles

shaders/shaders.properties

@@ -17,7 +17,7 @@ screen.COLOR.columns=3
 screen.COLOR=colorMode dithering <empty> rgbSteps <empty> <empty> hueSteps satSteps valSteps
 
 #	screen effects
-screen.SCREEN=interlacing aberration
+screen.SCREEN=interlacing scanlines aberration
 
 #	console effects
 screen.CONSOLE.columns=1