RetroArch Pack

system/PPSSPP/shaders/inversecolors.fsh

@@ -0,0 +1,19 @@
+// Simple false color shader
+
+#ifdef GL_ES
+precision mediump float;
+precision mediump int;
+#endif
+
+uniform sampler2D sampler0;
+varying vec2 v_texcoord0;
+
+void main() {
+  vec3 rgb = texture2D(sampler0, v_texcoord0.xy).xyz;
+  float luma = dot(rgb, vec3(0.299, 0.587, 0.114));
+  vec3 gray = vec3(luma, luma, luma) - 0.5;
+  rgb -= vec3(0.5, 0.5, 0.5);
+
+  gl_FragColor.rgb = mix(rgb, gray, 2.0) + 0.5;
+  gl_FragColor.a = 1.0;
+}