im nauseous

shaders/ScreenShader.frag

@@ -0,0 +1,29 @@
+#version 330 core
+out vec4 FragColor;
+  
+in vec2 TexCoords;
+
+uniform sampler2D screenTexture;
+uniform float brightness = 0.0f;
+uniform float colorContrast = 0.0f;
+uniform float saturation = 1.0f;
+
+void main()
+{ 
+    vec3 originalcolor = texture(screenTexture, TexCoords).rgb;
+    vec3 finalcolor = originalcolor;
+    const float gamma = 2.2;
+    finalcolor = pow(finalcolor, vec3(1.0 / gamma));
+
+    vec3 contrast = vec3(1.0f) - finalcolor;
+
+    finalcolor = mix(finalcolor,vec3(1.0f) - finalcolor,colorContrast);
+
+    float average = (finalcolor[0]+finalcolor[1]+finalcolor[2])/3.0f;
+    
+    for (int i = 0; i < 3; i++) {
+        finalcolor[i] = average + saturation * (finalcolor[i] - average);
+    }
+
+    FragColor = vec4(finalcolor,1.0f);
+}