Shader cleanup

core/assets/bloomshaders/threshold.frag

@@ -0,0 +1,15 @@
+#ifdef GL_ES
+#define LOWP lowp
+#define MED mediump
+precision lowp float;
+#else
+#define LOWP  
+#define MED 
+#endif
+uniform sampler2D u_texture0;
+uniform vec2 threshold;
+varying MED vec2 v_texCoords;
+void main()
+{	
+ 	gl_FragColor.rgb = (texture2D(u_texture0, v_texCoords).rgb - vec3(threshold.x))  * threshold.y;
+}