RetroArch Pack

system/PPSSPP/shaders/crt.fsh

@@ -0,0 +1,33 @@
+// Retro (CRT) shader, created to use in PPSSPP.
+
+#ifdef GL_ES
+precision mediump float;
+precision mediump int;
+#endif
+
+uniform sampler2D sampler0;
+varying vec2 v_texcoord0;
+uniform vec4 u_time;
+
+void main()
+{
+    // scanlines
+    int vPos = int( ( v_texcoord0.y + u_time.x * 0.5 ) * 272.0 );
+    float line_intensity = mod( float(vPos), 2.0 );
+    
+    // color shift
+    float off = line_intensity * 0.0005;
+    vec2 shift = vec2( off, 0 );
+    
+    // shift R and G channels to simulate NTSC color bleed
+    vec2 colorShift = vec2( 0.001, 0 );
+    float r = texture2D( sampler0, v_texcoord0 + colorShift + shift ).x;
+    float g = texture2D( sampler0, v_texcoord0 - colorShift + shift ).y;
+    float b = texture2D( sampler0, v_texcoord0 ).z;
+    
+    vec4 c = vec4( r, g * 0.99, b, 1.0 ) * clamp( line_intensity, 0.85, 1.0 );
+    
+    float rollbar = sin( ( v_texcoord0.y + u_time.x ) * 4.0 );
+    
+    gl_FragColor.rgba = c + (rollbar * 0.02);
+}