added chromatic aberration

README.md

@@ -5,6 +5,7 @@ aimed at providing a variety of effects in the vein of its parent project.
 
 ## Features
 
+- Chromatic Aberration
 - Color depth reduction
 - Depth of Field
 - Dithering

shaders/composite.fsh

@@ -1,6 +1,7 @@
 #version 120
 
-#define pixelSize 2 // the size of pixels [1 2 4 8 16]
+#include "/module/common.glsl"
+
 float renderRes = pixelSize;
 
 #define dithering // whether or not to apply dithering

shaders/final.fsh

@@ -1,6 +1,8 @@
 #version 120
 
-#define pixelSize // [1 2 4 8 16]
+#include "/module/common.glsl"
+
+//#define aberration
 //#define hBlur
 
 varying vec2 texcoord;
@@ -8,14 +10,21 @@ varying vec2 texcoord;
 uniform sampler2D gcolor;
 uniform float viewWidth;
 
+#include "/module/aberration.frag"
 #include "/module/horizontal_blur.frag"
 
 void main() {
+	vec3 color;
 	#ifdef hBlur
-		vec3 blurred = hblur();
-		gl_FragData[0] = vec4(blurred, 1);
+		color = hblur();
 	#else
-		gl_FragData[0] = texture2D(gcolor, texcoord);
+		color = texture2D(gcolor, texcoord).rgb;
 	#endif
+
+	#ifdef aberration
+		color.rb = aberrate().rb;
+	#endif
+
+	gl_FragData[0] = vec4(color, 1);
 }
 

shaders/gbuffers_basic.vsh

@@ -1,6 +1,6 @@
 #version 120
 
-#define pixelSize 2 // [1 2 4 8 16]
+#include "/module/common.glsl"
 
 #define worldCurvature 0 // [0 1 2]
 

shaders/lang/en_US.lang

@@ -24,6 +24,7 @@ option.satSteps=Saturation Depth
 option.valSteps=Value Depth
 
 screen.SCREEN=Screen
+option.aberration=Chromatic Aberration
 
 screen.CONSOLE=Consoles
 

shaders/module/aberration.frag

@@ -0,0 +1,10 @@
+
+vec2 caOffset = vec2(pixelSize / viewWidth, 0);
+
+vec3 aberrate() {
+	float red	= texture2D(gcolor, texcoord - caOffset).r;
+	float blue	= texture2D(gcolor, texcoord + caOffset).b;
+
+	return vec3(red, 0, blue);
+}
+

shaders/module/common.glsl

@@ -0,0 +1,3 @@
+
+#define pixelSize 2 // [1 2 4 8 16]
+

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=<empty>
+screen.SCREEN=aberration
 
 #	console effects
 screen.CONSOLE.columns=1