From b18cbe23524552db21d841a077b12fd3a190677e Mon Sep 17 00:00:00 2001
From: Recrown <yunyangdeng@gmail.com>
Date: Sun, 3 Sep 2017 03:29:33 -0500
Subject: [PATCH] added bloom shader

---
 android/assets/shaders/{bg.vsh => basic.vsh}  |   0
 android/assets/shaders/bg.fsh                 | 174 ------------------
 android/assets/shaders/bright_filter.fsh      |  22 +++
 android/assets/shaders/combine.fsh            |  18 ++
 android/assets/shaders/gaussian_blur.fsh      |  33 ++++
 android/assets/shaders/glow.fsh               |  38 ----
 android/assets/shaders/glow.vsh               |  14 --
 .../rhythmbullet/screens/CreativeScreen.java  |  15 +-
 .../rhythmbullet/screens/GameScreen.java      |  42 +----
 .../stages/{ui => }/CreativeHUD.java          |   6 +-
 .../rhythmbullet/stages/{ui => }/GameHUD.java |   4 +-
 .../rhythmbullet/stages/GamePlayArea.java     | 122 ++++++++----
 12 files changed, 170 insertions(+), 318 deletions(-)
 rename android/assets/shaders/{bg.vsh => basic.vsh} (100%)
 delete mode 100755 android/assets/shaders/bg.fsh
 create mode 100755 android/assets/shaders/bright_filter.fsh
 create mode 100755 android/assets/shaders/combine.fsh
 create mode 100755 android/assets/shaders/gaussian_blur.fsh
 delete mode 100755 android/assets/shaders/glow.fsh
 delete mode 100755 android/assets/shaders/glow.vsh
 rename core/src/zero1hd/rhythmbullet/stages/{ui => }/CreativeHUD.java (96%)
 rename core/src/zero1hd/rhythmbullet/stages/{ui => }/GameHUD.java (95%)

diff --git a/android/assets/shaders/bg.vsh b/android/assets/shaders/basic.vsh
similarity index 100%
rename from android/assets/shaders/bg.vsh
rename to android/assets/shaders/basic.vsh
diff --git a/android/assets/shaders/bg.fsh b/android/assets/shaders/bg.fsh
deleted file mode 100755
index cc042a0..0000000
--- a/android/assets/shaders/bg.fsh
+++ /dev/null
@@ -1,174 +0,0 @@
-#ifdef GL_ES
-precision mediump float;
-#endif
-
-uniform float time;
-uniform vec2 mouse;
-uniform vec2 resolution;
-
-
-#define iterations 14
-#define formuparam2 0.79
-
-#define volsteps 5
-#define stepsize 0.290
-
-#define zoom 0.900
-#define tile   0.850
-#define speed2  0.10
-
-#define brightness 0.003
-#define darkmatter 0.400
-#define distfading 0.560
-#define saturation 0.800
-
-
-#define transverseSpeed zoom*2.0
-#define cloud 0.11
-
-
-float triangle(float x, float a) {
-	float output2 = 2.0*abs(  2.0*  ( (x/a) - floor( (x/a) + 0.5) ) ) - 1.0;
-	return output2;
-}
-
-float field(in vec3 p) {
-	float strength = 7. + .03 * log(1.e-6 + fract(sin(time) * 4373.11));
-	float accum = 0.;
-	float prev = 0.;
-	float tw = 0.;
-
-	for (int i = 0; i < 6; ++i) {
-		float mag = dot(p, p);
-		p = abs(p) / mag + vec3(-.5, -.8 + 0.1*sin(time*0.7 + 2.0), -1.1+0.3*cos(time*0.3));
-		float w = exp(-float(i) / 7.);
-		accum += w * exp(-strength * pow(abs(mag - prev), 2.3));
-		tw += w;
-		prev = mag;
-	}
-	return max(0., 5. * accum / tw - .7);
-}
-
-
-
-void main() {
-     	vec2 uv2 = 2. * gl_FragCoord.xy / vec2(512) - 1.;
-	vec2 uvs = uv2 * vec2(512)  / 512.;
-
-	float time2 = time;
-        float speed = speed2;
-        speed = .01 * cos(time2*0.002 + 3.1415926/4.0);
-	//speed = 0.0;
-    	float formuparam = formuparam2;
-
-    	//get coords and direction
-	vec2 uv = uvs;
-	//mouse rotation
-	float a_xz = 0.9;
-	float a_yz = -.6;
-	float a_xy = 0.9 + time*0.08;
-
-	mat2 rot_xz = mat2(cos(a_xz),sin(a_xz),-sin(a_xz),cos(a_xz));
-	mat2 rot_yz = mat2(cos(a_yz),sin(a_yz),-sin(a_yz),cos(a_yz));
-	mat2 rot_xy = mat2(cos(a_xy),sin(a_xy),-sin(a_xy),cos(a_xy));
-
-
-	float v2 =1.0;
-	vec3 dir=vec3(uv*zoom,1.);
-	vec3 from=vec3(0.0, 0.0,0.0);
-        from.x -= 1.;
-        from.y -= 1.;
-
-
-	vec3 forward = vec3(0.,0.,1.);
-	from.x += transverseSpeed*(1.0)*cos(0.001*time);
-	from.y += transverseSpeed*(1.0)*sin(0.001*time);
-	from.z += 0.003*time;
-
-	dir.xy*=rot_xy;
-	forward.xy *= rot_xy;
-	dir.xz*=rot_xz;
-	forward.xz *= rot_xz;
-	dir.yz*= rot_yz;
-	forward.yz *= rot_yz;
-
-	from.xy*=-rot_xy;
-	from.xz*=rot_xz;
-	from.yz*= rot_yz;
-
-
-	//zoom
-	float zooom = (time2-3311.)*speed;
-	from += forward* zooom;
-	float sampleShift = mod( zooom, stepsize );
-
-	float zoffset = -sampleShift;
-	sampleShift /= stepsize; // make from 0 to 1
-
-	//volumetric rendering
-	float s=0.24;
-	float s3 = s + stepsize/2.0;
-	vec3 v=vec3(0.);
-	float t3 = 0.0;
-
-	vec3 backCol2 = vec3(0.);
-	for (int r=0; r<volsteps; r++) {
-		vec3 p2=from+(s+zoffset)*dir;// + vec3(0.,0.,zoffset);
-		vec3 p3=from+(s3+zoffset)*dir;// + vec3(0.,0.,zoffset);
-
-		p2 = abs(vec3(tile)-mod(p2,vec3(tile*2.))); // tiling fold
-		p3 = abs(vec3(tile)-mod(p3,vec3(tile*2.))); // tiling fold
-		#ifdef cloud
-		t3 = field(p3);
-		#endif
-
-		float pa,a=pa=0.;
-		for (int i=0; i<iterations; i++) {
-			p2=abs(p2)/dot(p2,p2)-formuparam; // the magic formula
-			//p=abs(p)/max(dot(p,p),0.005)-formuparam; // another interesting way to reduce noise
-			float D = abs(length(p2)-pa); // absolute sum of average change
-			a += i > 7 ? min( 12., D) : D;
-			pa=length(p2);
-		}
-
-
-		//float dm=max(0.,darkmatter-a*a*.001); //dark matter
-		a*=a*a; // add contrast
-		//if (r>3) fade*=1.-dm; // dark matter, don't render near
-		// brightens stuff up a bit
-		float s1 = s+zoffset;
-		// need closed form expression for this, now that we shift samples
-		float fade = pow(distfading,max(0.,float(r)-sampleShift));
-		//t3 += fade;
-		v+=fade;
-	       	//backCol2 -= fade;
-
-		// fade out samples as they approach the camera
-		if( r == 0 )
-			fade *= (1. - (sampleShift));
-		// fade in samples as they approach from the distance
-		if( r == volsteps-1 )
-			fade *= sampleShift;
-		v+=vec3(s1,s1*s1,s1*s1*s1*s1)*a*brightness*fade; // coloring based on distance
-
-		backCol2 += mix(.4, 1., v2) * vec3(1.8 * t3 * t3 * t3, 1.4 * t3 * t3, t3) * fade;
-
-
-		s+=stepsize;
-		s3 += stepsize;
-	}
-
-	v=mix(vec3(length(v)),v,saturation); //color adjust
-
-	vec4 forCol2 = vec4(v*.01,1.);
-	#ifdef cloud
-	backCol2 *= cloud;
-	#endif
-	backCol2.b *= 1.8;
-	backCol2.r *= 0.05;
-
-	backCol2.b = 0.5*mix(backCol2.g, backCol2.b, 0.8);
-	backCol2.g = 0.0;
-	backCol2.bg = mix(backCol2.gb, backCol2.bg, 0.5*(cos(time*0.01) + 1.0));
-	gl_FragColor = forCol2 + vec4(backCol2, 1.0);
-}
diff --git a/android/assets/shaders/bright_filter.fsh b/android/assets/shaders/bright_filter.fsh
new file mode 100755
index 0000000..3921e9f
--- /dev/null
+++ b/android/assets/shaders/bright_filter.fsh
@@ -0,0 +1,22 @@
+#ifdef GL_ES
+#define LOWP lowp
+precision mediump float;
+#else
+#define LOWP
+#endif
+
+varying LOWP vec4 vColor;
+varying vec2 vTexCoord;
+
+uniform sampler2D u_texture;
+
+void main() {
+	vec4 color = texture(u_texture, vTexCoord)*vColor;
+	float brightness = (color.r*0.2126) + (color.g*0.7152) + (color.b * 0.0722);
+	
+	if (brightness > 0.7) {
+		gl_FragColor = color;
+	} else {
+		gl_FragColor = vec4(0.0);
+	}
+}
diff --git a/android/assets/shaders/combine.fsh b/android/assets/shaders/combine.fsh
new file mode 100755
index 0000000..a07f084
--- /dev/null
+++ b/android/assets/shaders/combine.fsh
@@ -0,0 +1,18 @@
+#ifdef GL_ES
+#define LOWP lowp
+precision mediump float;
+#else
+#define LOWP
+#endif
+
+varying LOWP vec4 vColor;
+varying vec2 vTexCoord;
+
+
+uniform sampler2D u_texture;
+uniform sampler2D u_texture1;
+void main() {
+	vec4 origColor = texture(u_texture, vTexCoord);
+	vec4 blurredColor = texture(u_texture1, vTexCoord);
+	gl_FragColor = origColor + blurredColor;
+}
diff --git a/android/assets/shaders/gaussian_blur.fsh b/android/assets/shaders/gaussian_blur.fsh
new file mode 100755
index 0000000..88548a8
--- /dev/null
+++ b/android/assets/shaders/gaussian_blur.fsh
@@ -0,0 +1,33 @@
+#version 330 core
+#ifdef GL_ES
+#define LOWP lowp
+precision mediump float;
+#else
+#define LOWP
+#endif
+
+varying LOWP vec4 vColor;
+varying vec2 vTexCoord;
+
+uniform int horizontal;
+uniform sampler2D u_texture;
+uniform float weight[5] = float[] (0.227027, 0.1945946, 0.1216216, 0.054054, 0.016216);
+
+void main() {
+	vec2 tex_offset = 1.0 /textureSize(u_texture, 0);
+	vec3 result = texture(u_texture, vTexCoord).rgb * weight[0];
+	
+	if (horizontal == 1) {
+		for (int i = 1; i < 5; ++i) {
+			result += texture(u_texture, vTexCoord + vec2(tex_offset.x *i, 0.0)).rgb * weight[i];
+			result += texture(u_texture, vTexCoord - vec2(tex_offset.x *i, 0.0)).rgb * weight[i];
+		}
+	} else {
+		for (int i = 1; i < 5; ++i) {
+            result += texture(u_texture, vTexCoord + vec2(0.0, tex_offset.y * i)).rgb * weight[i];
+            result += texture(u_texture, vTexCoord - vec2(0.0, tex_offset.y * i)).rgb * weight[i];
+		}
+	}
+	
+	gl_FragColor = vec4(result, 1.0);
+}
diff --git a/android/assets/shaders/glow.fsh b/android/assets/shaders/glow.fsh
deleted file mode 100755
index c68efd7..0000000
--- a/android/assets/shaders/glow.fsh
+++ /dev/null
@@ -1,38 +0,0 @@
-#ifdef GL_ES
-#define LOWP lowp
-precision mediump float;
-#else
-#define LOWP
-#endif
-
-varying LOWP vec4 vColor;
-varying vec2 vTexCoord;
-
-uniform sampler2D u_texture;
-
-void main() {
-	vec4 sum = vec4(0);
-	vec2 texcoord = vTexCoord;
-	int j;
-	int i;
-
-	for (i = -4; i < 4; i++) {
-		for (j = -3; j < 3; j++) {
-			sum += texture2D(u_texture, texcoord + vec2(j, i)*0.004) * 0.25;
-		}
-	}
-	if (texture2D(u_texture, texcoord).r * vColor.r < 0.3) {
-		gl_FragColor = vec4(sum * sum * 0.012 + texture2D(u_texture, texcoord))
-				* vColor;
-	} else {
-		if (texture2D(u_texture, texcoord).r * vColor.r < 0.5) {
-			gl_FragColor = vec4(
-					sum * sum * 0.009 + texture2D(u_texture, texcoord))
-					* vColor;
-		} else {
-			gl_FragColor = vec4(
-					sum * sum * 0.0075 + texture2D(u_texture, texcoord))
-					* vColor;
-		}
-	}
-}
diff --git a/android/assets/shaders/glow.vsh b/android/assets/shaders/glow.vsh
deleted file mode 100755
index f0b6c23..0000000
--- a/android/assets/shaders/glow.vsh
+++ /dev/null
@@ -1,14 +0,0 @@
-attribute vec4 a_position;
-attribute vec4 a_color;
-attribute vec2 a_texCoord0;
-
-uniform mat4 u_projTrans;
-
-varying vec4 vColor;
-varying vec2 vTexCoord;
-
-void main() {
-	vColor = a_color;
-	vTexCoord = a_texCoord0;
-	gl_Position = u_projTrans * a_position;
-}
diff --git a/core/src/zero1hd/rhythmbullet/screens/CreativeScreen.java b/core/src/zero1hd/rhythmbullet/screens/CreativeScreen.java
index b69bc58..f99ec07 100755
--- a/core/src/zero1hd/rhythmbullet/screens/CreativeScreen.java
+++ b/core/src/zero1hd/rhythmbullet/screens/CreativeScreen.java
@@ -9,9 +9,9 @@ import com.badlogic.gdx.graphics.Texture;
 import com.badlogic.gdx.graphics.g2d.SpriteBatch;
 
 import zero1hd.rhythmbullet.RhythmBullet;
+import zero1hd.rhythmbullet.stages.CreativeHUD;
+import zero1hd.rhythmbullet.stages.GameHUD;
 import zero1hd.rhythmbullet.stages.GamePlayArea;
-import zero1hd.rhythmbullet.stages.ui.CreativeHUD;
-import zero1hd.rhythmbullet.stages.ui.GameHUD;
 
 public class CreativeScreen extends ScreenAdapter {
 	CreativeHUD chud;
@@ -19,9 +19,6 @@ public class CreativeScreen extends ScreenAdapter {
 	GamePlayArea gamePlayArea;
 	InputMultiplexer inputs;
 	
-	SpriteBatch bgBatch;
-	private Texture background;
-	
 	Preferences prefs;
 	
 	public CreativeScreen(RhythmBullet core, MainMenu mainMenu) {
@@ -31,10 +28,6 @@ public class CreativeScreen extends ScreenAdapter {
 		inputs = new InputMultiplexer(chud, ghud, gamePlayArea);
 
 		this.prefs = core.getPrefs();
-		
-		background = core.getAssetManager().get("star_bg.png");
-		bgBatch = new SpriteBatch(1);
-
 	}
 	
 	@Override
@@ -49,10 +42,6 @@ public class CreativeScreen extends ScreenAdapter {
 		Gdx.gl.glClearColor(0.2f, 0.2f, 0.2f, 1f);
         Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
 
-		bgBatch.begin();
-		bgBatch.draw(background, 0f, 0f);
-		bgBatch.end();
-        
 		gamePlayArea.getViewport().apply();
 		gamePlayArea.act();
 		gamePlayArea.draw();
diff --git a/core/src/zero1hd/rhythmbullet/screens/GameScreen.java b/core/src/zero1hd/rhythmbullet/screens/GameScreen.java
index 0d60902..871d3ed 100755
--- a/core/src/zero1hd/rhythmbullet/screens/GameScreen.java
+++ b/core/src/zero1hd/rhythmbullet/screens/GameScreen.java
@@ -5,9 +5,6 @@ import com.badlogic.gdx.InputMultiplexer;
 import com.badlogic.gdx.Screen;
 import com.badlogic.gdx.ScreenAdapter;
 import com.badlogic.gdx.graphics.GL20;
-import com.badlogic.gdx.graphics.Texture;
-import com.badlogic.gdx.graphics.g2d.SpriteBatch;
-import com.badlogic.gdx.graphics.glutils.ShaderProgram;
 import com.badlogic.gdx.scenes.scene2d.Actor;
 import com.badlogic.gdx.scenes.scene2d.ui.ImageButton;
 import com.badlogic.gdx.scenes.scene2d.utils.ChangeListener;
@@ -15,8 +12,8 @@ import com.badlogic.gdx.scenes.scene2d.utils.ChangeListener;
 import zero1hd.rhythmbullet.RhythmBullet;
 import zero1hd.rhythmbullet.audio.CoreMusicInfo;
 import zero1hd.rhythmbullet.audio.map.GamePlayMap;
+import zero1hd.rhythmbullet.stages.GameHUD;
 import zero1hd.rhythmbullet.stages.GamePlayArea;
-import zero1hd.rhythmbullet.stages.ui.GameHUD;
 
 public class GameScreen extends ScreenAdapter {
 	private GamePlayArea gameArea;
@@ -28,10 +25,6 @@ public class GameScreen extends ScreenAdapter {
 	
 	private CoreMusicInfo music;
 	
-	SpriteBatch bgBatch;
-	private ShaderProgram bgShader;
-	private Texture background;
-	
 	public GameScreen(RhythmBullet core, Screen screen) {
 		this.core = core;
 		
@@ -53,25 +46,6 @@ public class GameScreen extends ScreenAdapter {
 		inputs.addProcessor(gameHUD);
 		inputs.addProcessor(gameArea);
 		
-		background = core.getAssetManager().get("star_bg.png");
-		
-		if (core.getPrefs().getBoolean("bg shader")) {
-			Gdx.app.debug("Shader", "using background shader");
-			
-			bgShader = new ShaderProgram(Gdx.files.internal("shaders/bg.vsh"), Gdx.files.internal("shaders/bg.fsh"));
-			
-			if (!bgShader.isCompiled()) {
-				System.err.println(bgShader.getLog());
-				System.exit(0);
-			}
-			if (bgShader.getLog().length()!=0) {
-				System.out.println(bgShader.getLog());
-			}
-			
-			bgBatch = new SpriteBatch(2, bgShader);
-		} else {
-			bgBatch = new SpriteBatch(2);
-		}
 	}
 	
 	public void setGamePlayMap(GamePlayMap gpm) {
@@ -97,20 +71,6 @@ public class GameScreen extends ScreenAdapter {
 	public void render(float delta) {
 		Gdx.gl.glClearColor(0f, 0f, 0f, 0f);
 		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
-		//Background stuff should literally span the whole screen so no matrice stuff
-		bgBatch.begin();
-		if (bgShader != null) {
-			bgBatch.setShader(bgShader);
-			bgShader.setUniformf("resolution", Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
-			
-			if (music != null) {
-				bgShader.setUniformf("time", music.getPlaybackMusic().getPosition());
-			}
-		}
-		bgBatch.draw(background, 0f, 0f);
-		bgBatch.end();
-		
-		
 		//actual game and hud
 		if (!gameHUD.isPaused()) {
 			gameArea.act(delta);
diff --git a/core/src/zero1hd/rhythmbullet/stages/ui/CreativeHUD.java b/core/src/zero1hd/rhythmbullet/stages/CreativeHUD.java
similarity index 96%
rename from core/src/zero1hd/rhythmbullet/stages/ui/CreativeHUD.java
rename to core/src/zero1hd/rhythmbullet/stages/CreativeHUD.java
index b9f4ce1..c1d2078 100755
--- a/core/src/zero1hd/rhythmbullet/stages/ui/CreativeHUD.java
+++ b/core/src/zero1hd/rhythmbullet/stages/CreativeHUD.java
@@ -1,4 +1,4 @@
-package zero1hd.rhythmbullet.stages.ui;
+package zero1hd.rhythmbullet.stages;
 
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.Input.Keys;
@@ -18,7 +18,6 @@ import zero1hd.rhythmbullet.audio.AudioAnalyzer;
 import zero1hd.rhythmbullet.audio.AudioDataPackage;
 import zero1hd.rhythmbullet.audio.map.RhythmMapAlgorithm;
 import zero1hd.rhythmbullet.screens.MainMenu;
-import zero1hd.rhythmbullet.stages.GamePlayArea;
 import zero1hd.rhythmbullet.ui.windows.BassUMGraphWindow;
 import zero1hd.rhythmbullet.ui.windows.BeatViewer;
 import zero1hd.rhythmbullet.ui.windows.DifficultyWindow;
@@ -249,6 +248,8 @@ public class CreativeHUD extends Stage implements MiniListener {
 			musicPlayBackControls.setAudiofile(null);
 			analyzer = new AudioAnalyzer(musicSelector.getSelectedMusic());
 			analyzer.sender.addListener(this);
+			ghud.setMusic(null);
+
 			break;
 		case SPECTRAL_FLUX_DONE:
 			analyzer.runThresholdCleaning();
@@ -265,7 +266,6 @@ public class CreativeHUD extends Stage implements MiniListener {
 			musicPlayBackControls.setAudiofile(adp.getMusicInfo());
 			volumeWindow.setMusic(adp.getMusicInfo());
 			beatViewer.setMusic(adp.getMusicInfo(), analyzer.getAudioDataPackage());
-			ghud.setMusic(null);
 			
 			bassUMgraphWindow.setData(analyzer.getAudioDataPackage().getBassPeaks(), analyzer.getAudioDataPackage().getuMPeaks(), adp.getMusicInfo());
 			bassUMgraphWindow.getGraph().avgG1 = adp.getBassAvg();
diff --git a/core/src/zero1hd/rhythmbullet/stages/ui/GameHUD.java b/core/src/zero1hd/rhythmbullet/stages/GameHUD.java
similarity index 95%
rename from core/src/zero1hd/rhythmbullet/stages/ui/GameHUD.java
rename to core/src/zero1hd/rhythmbullet/stages/GameHUD.java
index 9c1895f..3be8489 100755
--- a/core/src/zero1hd/rhythmbullet/stages/ui/GameHUD.java
+++ b/core/src/zero1hd/rhythmbullet/stages/GameHUD.java
@@ -1,4 +1,4 @@
-package zero1hd.rhythmbullet.stages.ui;
+package zero1hd.rhythmbullet.stages;
 
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.Input.Keys;
@@ -19,7 +19,6 @@ import com.badlogic.gdx.scenes.scene2d.ui.Skin;
 import com.badlogic.gdx.scenes.scene2d.utils.ChangeListener;
 
 import zero1hd.rhythmbullet.RhythmBullet;
-import zero1hd.rhythmbullet.stages.GamePlayArea;
 import zero1hd.rhythmbullet.ui.builders.HealthBar;
 import zero1hd.rhythmbullet.ui.windows.FPSWindow;
 import zero1hd.rhythmbullet.ui.windows.PauseMenu;
@@ -142,7 +141,6 @@ public class GameHUD extends Stage {
 				}
 			}
 		}
-		
 		super.act(delta);
 	}
 	
diff --git a/core/src/zero1hd/rhythmbullet/stages/GamePlayArea.java b/core/src/zero1hd/rhythmbullet/stages/GamePlayArea.java
index e3b8265..0a8994e 100755
--- a/core/src/zero1hd/rhythmbullet/stages/GamePlayArea.java
+++ b/core/src/zero1hd/rhythmbullet/stages/GamePlayArea.java
@@ -35,9 +35,13 @@ public class GamePlayArea extends Stage {
 	
 	public ScoreManager score = new ScoreManager();
 	
-	private ShaderProgram glowShader;
-	private FrameBuffer blurTarget;
-	TextureRegion fboRegion;
+	private ShaderProgram gaussianBlurShader;
+	private ShaderProgram brightFilterShader;
+	private ShaderProgram combineShader;
+	private FrameBuffer lightFilterBuffer;
+	private FrameBuffer normalBuffer;
+	private FrameBuffer hBlur, vBlur;
+	private TextureRegion fboRegion;
 	private int fboSize;
 	
 	public GamePlayArea(AssetManager assetManager, Preferences prefs) {
@@ -63,32 +67,62 @@ public class GamePlayArea extends Stage {
 	
 	/**
 	 * needs to be called right after set as screen (should be called in show method).
+	 * This is due to the saving preference being done once the screen is hidden.
 	 * @param prefs
 	 */
 	public void loadShaders(Preferences prefs) {
 		if (prefs.getBoolean("glow shader")) {
 			Gdx.app.debug("Shader", "using glow shader");
-			glowShader = new ShaderProgram(Gdx.files.internal("shaders/glow.vsh"), Gdx.files.internal("shaders/glow.fsh"));
-			if (!glowShader.isCompiled()) {
-				System.err.println(glowShader.getLog());
+			brightFilterShader = new ShaderProgram(Gdx.files.internal("shaders/basic.vsh"), Gdx.files.internal("shaders/bright_filter.fsh"));
+			if (!brightFilterShader.isCompiled()) {
+				System.err.println(brightFilterShader.getLog());
 				System.exit(0);
 			}
-			if (glowShader.getLog().length() != 0) {
-				System.out.println(glowShader.getLog());
+			if (brightFilterShader.getLog().length() != 0) {
+				System.out.println(brightFilterShader.getLog());
+			}
+				
+			gaussianBlurShader = new ShaderProgram(Gdx.files.internal("shaders/basic.vsh"), Gdx.files.internal("shaders/gaussian_blur.fsh"));
+			if (!gaussianBlurShader.isCompiled()) {
+				System.err.println(gaussianBlurShader.getLog());
+				System.exit(0);
+			}
+			if (gaussianBlurShader.getLog().length() != 0) {
+				System.out.println(gaussianBlurShader.getLog());
 			}
 			
+			combineShader = new ShaderProgram(Gdx.files.internal("shaders/basic.vsh"), Gdx.files.internal("shaders/combine.fsh"));
+			if (!combineShader.isCompiled()) {
+				System.err.println(combineShader.getLog());
+				System.exit(0);
+			}
+			if (combineShader.getLog().length() != 0) {
+				System.out.println(combineShader.getLog());
+			}
+			
+			
 			if (Gdx.graphics.getWidth() < 1024) {
-				fboSize = 1024;
-			} else if (Gdx.graphics.getWidth() < 2048) {
 				fboSize = 2048;
+			} else if (Gdx.graphics.getWidth() < 2048) {
+				fboSize = 4096;
 			} else {
 				fboSize = 4096;
 			}
 			
-			blurTarget = new FrameBuffer(Format.RGBA8888, fboSize, fboSize, false);
-
-			fboRegion = new TextureRegion(blurTarget.getColorBufferTexture());
-			fboRegion.flip(false, true);
+			lightFilterBuffer = new FrameBuffer(Format.RGBA8888, fboSize/4, fboSize/4, false);
+			normalBuffer = new FrameBuffer(Format.RGBA8888, fboSize, fboSize, false);
+			hBlur = new FrameBuffer(Format.RGBA8888, fboSize, fboSize, false);
+			vBlur = new FrameBuffer(Format.RGBA8888, fboSize, fboSize, false);
+			
+			fboRegion = new TextureRegion();
+			
+			combineShader.begin();
+			combineShader.setUniformi("u_texture1", 1);
+			combineShader.end();
+			
+			vBlur.getColorBufferTexture().bind(1);
+			
+			Gdx.gl.glActiveTexture(GL20.GL_TEXTURE0);
 		}
 		
 		ShaderProgram.pedantic = false;
@@ -96,27 +130,52 @@ public class GamePlayArea extends Stage {
 	
 	@Override
 	public void draw() {
-		//TODO batch draw background
-		if (glowShader != null) {
-			blurTarget.begin();
-
+		if (gaussianBlurShader != null) {
+			//Begin drawing a normal version of screen
+			normalBuffer.begin();
 			Gdx.gl.glClearColor(0f, 0f, 0f, 0f);
 			Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
-			getBatch().setBlendFunction(-1, -1);
-			Gdx.gl20.glBlendFuncSeparate(GL20.GL_ONE, GL20.GL_ONE_MINUS_SRC_ALPHA,GL20.GL_ONE, GL20.GL_DST_ALPHA);
 			super.draw();
 			collisionDetector.renderParticles(getBatch(), Gdx.graphics.getDeltaTime(), true);
-			blurTarget.end(getViewport().getScreenX(), getViewport().getScreenY(), getViewport().getScreenWidth(), getViewport().getScreenHeight());
-			getBatch().setBlendFunction(GL20.GL_SRC_ALPHA, GL20.GL_ONE_MINUS_SRC_ALPHA);
+			normalBuffer.end(getViewport().getScreenX(), getViewport().getScreenY(), getViewport().getScreenWidth(), getViewport().getScreenHeight());
+			//END
 			
-			getBatch().setBlendFunction(GL20.GL_ONE, GL20.GL_ONE_MINUS_SRC_ALPHA);
-			getBatch().begin();
-			getBatch().setShader(glowShader);
+			//Begin light filtering
+			lightFilterBuffer.begin();
+			Gdx.gl.glClearColor(0f, 0f, 0f, 0f);
+			Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
+			getBatch().setShader(brightFilterShader);
+			getBatch().begin(); //BATCH STARTS HERE
+			getRoot().draw(getBatch(), 1f);
+			getBatch().flush();
+			lightFilterBuffer.end(getViewport().getScreenX(), getViewport().getScreenY(), getViewport().getScreenWidth(), getViewport().getScreenHeight());
+			
+			//Horizontal gaussian blur
+			hBlur.begin();
+			fboRegion.setTexture(lightFilterBuffer.getColorBufferTexture());
+			getBatch().setShader(gaussianBlurShader);
+			gaussianBlurShader.setUniformf("horizontal", 1);
+			getBatch().draw(fboRegion, 0f, 0f, RhythmBullet.GAME_AREA_WIDTH, RhythmBullet.GAME_AREA_HEIGHT);
+			getBatch().flush();
+			hBlur.end(getViewport().getScreenX(), getViewport().getScreenY(), getViewport().getScreenWidth(), getViewport().getScreenHeight());
+			
+			//Vertical gaussian blur
+			vBlur.begin();
+			fboRegion.setTexture(hBlur.getColorBufferTexture());
+			getBatch().setShader(gaussianBlurShader);
+			gaussianBlurShader.setUniformf("horizontal", 0);
+			getBatch().draw(fboRegion, 0f, 0f, RhythmBullet.GAME_AREA_WIDTH, RhythmBullet.GAME_AREA_HEIGHT);
+			getBatch().flush();
+			vBlur.end(getViewport().getScreenX(), getViewport().getScreenY(), getViewport().getScreenWidth(), getViewport().getScreenHeight());
+			
+			//Draw everything to screen
+			getBatch().setShader(combineShader);
+			fboRegion.setRegion(normalBuffer.getColorBufferTexture());
+			fboRegion.flip(false, true);
 			getBatch().draw(fboRegion, 0f, 0f, RhythmBullet.GAME_AREA_WIDTH, RhythmBullet.GAME_AREA_HEIGHT);
 			getBatch().setShader(null);
+			getBatch().end(); //BATCH ENDS HERE
 			
-			getBatch().end();
-
 		} else {
 			super.draw();
 		}
@@ -162,7 +221,7 @@ public class GamePlayArea extends Stage {
 			polyjet.moveUp = true;
 		}
 		
-		if (keycode == KeyMap.down) {
+		if (keycode == KeyMap.down) {        
 			polyjet.moveDown = true;
 		}
 		
@@ -205,11 +264,10 @@ public class GamePlayArea extends Stage {
 	
 	@Override
 	public void dispose() {
-		if (glowShader != null) {
-			blurTarget.dispose();
-			glowShader.dispose();
+		if (gaussianBlurShader != null) {
+			normalBuffer.dispose();
+			gaussianBlurShader.dispose();
 		}
 		super.dispose();
 	}
-	
 }