added connector option for composite and s-video

shaders/final.fsh

@@ -13,23 +13,34 @@ uniform float viewWidth;
 #include "/module/aberration.frag"
 #include "/module/horizontal_blur.frag"
 #include "/module/scanline.frag"
+#include "/module/signal.frag"
 
 void main() {
 	vec3 color;
+
+
+	//	software post-processing effects
 	#ifdef hBlur
 		color = hblur();
 	#else
 		color = texture2D(gcolor, texcoord).rgb;
 	#endif
 
-	#ifdef aberration
-		color.rb = aberrate().rb;
-	#endif
-
 	#if scanline > 0
 		color = scanlines(color);
 	#endif
 
+	//	hardware post-processing effects
+	#if		signal == SIGNAL_NTSC
+		color = ntsc(color);
+	#endif
+
+	//	physical post-processing effects
+	#ifdef aberration
+		color.rb = aberrate(color).rb;
+	#endif
+
+
 	gl_FragData[0] = vec4(color, 1);
 }
 

shaders/lang/en_US.lang

@@ -52,6 +52,14 @@ suffix.valBits=-bit
 
 screen.SCREEN=Screen
 
+option.signal=Signal
+value.signal.0=RGB (Off)
+value.signal.1=NTSC
+
+option.wire=Connector
+value.wire.0=Composite
+value.wire.1=S-Video
+
 option.interlacing=Interlacing
 
 option.scanline=Scanlines

shaders/module/aberration.frag

@@ -1,10 +1,10 @@
 
 vec2 caOffset = vec2(2 * pixelSize / viewWidth, 0);
 
-vec3 aberrate() {
+vec3 aberrate(vec3 color) {
 	vec2 offset	= caOffset * abs(cos(texcoord * 3.14));
-	float red	= texture2D(gcolor, texcoord - offset).r;
+	float red	= color.r;
-	float blue	= texture2D(gcolor, texcoord + offset).b;
+	float blue	= color.b;
 
 	return vec3(red, 0, blue);
 }

shaders/module/signal.frag

@@ -0,0 +1,38 @@
+
+#include "/var/signal.glsl"
+
+#define signal 0 // [0 1]
+#define wire 0 // [0 1]
+
+vec3 ntsc(vec3 color) {
+	//	convert to YIQ
+	float y = dot(color, vec3(0.299, 0.587, 0.114));
+	float i = dot(color, vec3(0.596, -.274, -.322));
+	float q = dot(color, vec3(0.211, -.523, 0.312));
+
+	//	faux ntsc signal
+	float carrier = 6.283 * 3.570 * gl_FragCoord.x;		//	2π * 3.57MHz * x
+	float phase = sin(carrier) * i + cos(carrier) * q;
+	float quad = cos(carrier) * i - sin(carrier) * q;
+
+	//	decode faux signal
+	#if		wire == WIRE_COMPOSITE
+		float composite = phase + quad + (y * 5.500);	//	p + q + (y * 5.5MHz)
+		y = round(composite * 5.500) / 30.250;
+		phase = composite - quad - (y * 5.500);
+		quad = composite - phase - (y * 5.500);
+	#endif
+	i = quad * cos(carrier);
+	q = phase * sin(carrier);
+
+	//	convert back to RGB
+	vec3 yiqColor = vec3(y, i, q);
+
+	vec3 outColor = vec3(0);
+	outColor.r = dot(yiqColor, vec3(1, 0.956, 0.619));
+	outColor.g = dot(yiqColor, vec3(1, -.272, -.674));
+	outColor.b = dot(yiqColor, vec3(1, -1.106, 1.703));
+
+	return outColor;
+}
+

shaders/shaders.properties

@@ -20,7 +20,7 @@ screen.COLOR.columns=3
 screen.COLOR=colorMode dithering <empty> colorDepth <empty> monoPalette hueBits satBits valBits
 
 #	screen effects
-screen.SCREEN=interlacing scanline aberration
+screen.SCREEN=signal wire interlacing scanline aberration
 
 #	console effects
 screen.CONSOLE.columns=1

shaders/var/signal.glsl

@@ -0,0 +1,7 @@
+
+#define SIGNAL_RGB		0
+#define SIGNAL_NTSC		1
+
+#define WIRE_COMPOSITE	0
+#define WIRE_SVIDEO		1
+