Fixed compilation

core/assets/bloomshaders/alpha_threshold.frag

@@ -0,0 +1,21 @@
+#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()
+{
+	vec4 color = texture2D(u_texture0, v_texCoords);
+	if(color.r + color.g + color.b > 0.5 * 3.0){
+		gl_FragColor = color;
+	}else{
+		gl_FragColor = vec4(0.0);
+	}
+ 	//gl_FragColor = (texture2D(u_texture0, v_texCoords) - vec4(threshold.r))  * threshold.g;
+}