make shader work tm

# Conflicts:
#	src/itdelatrisu/opsu/states/Game.java
#	src/itdelatrisu/opsu/states/Splash.java

res/sh_Cursor.vertex

@@ -0,0 +1,15 @@
+attribute vec4 m_Position;
+attribute vec2 m_TexCoord;
+attribute float m_Time;
+
+varying vec4 v_Color;
+varying vec2 v_TexCoord;
+
+uniform float g_FadeClock;
+
+void main(void)
+{
+	gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; //m_Position;
+	v_Color = vec4(1.0, 0.0, 0.0, g_FadeClock);
+	v_TexCoord = m_TexCoord;
+}

res/sh_Texture.frag

@@ -0,0 +1,13 @@
+#ifdef GL_ES
+    precision mediump float;
+#endif
+
+varying vec4 v_Color;
+varying vec2 v_TexCoord;
+
+uniform sampler2D m_Sampler;
+
+void main(void)
+{
+	gl_FragColor = v_Color * texture2D(m_Sampler, v_TexCoord);
+}

src/awlex/ospu/FakeGameObject.java

@@ -4,6 +4,7 @@ package awlex.ospu;
  * Created by Awlex on 10.10.2016.
  */
 
+import itdelatrisu.opsu.GameData;
 import itdelatrisu.opsu.objects.GameObject;
 import itdelatrisu.opsu.objects.curves.Vec2f;
 import org.newdawn.slick.Color;
@@ -35,6 +36,15 @@ public class FakeGameObject extends GameObject {
         this.start.y = this.end.y = (start.end.y + end.start.y) / 2;
     }
 
+    @Override
+    public GameObject clone(GameData a) {
+        FakeGameObject o = new FakeGameObject();
+        o.halfTime = this.halfTime;
+        o.start = this.start;
+        o.end = this.end;
+        return o;
+    }
+
     @Override
     public void draw(Graphics g, int trackPosition, boolean mirrored) {
 

src/com/osufx/sunpy/PropertyCollection.java

@@ -0,0 +1,92 @@
+package com.osufx.sunpy;
+
+import java.util.HashMap;
+
+public class PropertyCollection {
+    private HashMap<String, ShaderProperty> properties = new HashMap<>();
+    private Shader owner;
+
+    private boolean changed = false;
+
+    public PropertyCollection(Shader owner) {
+        this.owner = owner;
+    }
+
+    public void Clear() {
+        this.changed = true;
+        this.properties.clear();
+    }
+
+    public void Add(ShaderProperty prop) {
+        this.properties.put(prop.Name, prop);
+    }
+
+    public void Replace(ShaderProperty prop) {
+        this.properties.replace(prop.Name, prop);
+    }
+
+    public void Replace(String key, Object value) {
+        if (!this.properties.containsKey(key))
+            return;
+
+        ShaderProperty prop = this.properties.get(key);
+
+        if (value.getClass() != prop.Type){
+            System.out.println(String.format("%s variable %s does not take value type %s", this.owner.name, key, value.getClass()));
+            return;
+        }
+
+        if (prop.Value != null && prop.Value == value)
+            return;
+
+        prop.Value = value;
+    }
+
+    public void Remove(String key) {
+        this.properties.remove(key);
+    }
+
+    public void Set() {
+        if (!this.changed)
+            return;
+
+        for (ShaderProperty prop : this.properties.values()) {
+            prop.Set();
+        }
+
+        this.changed = false;
+    }
+
+    public ShaderProperty get(String propName) {
+        if (!this.properties.containsKey(propName))
+            return null;
+        return this.properties.get(propName);
+    }
+
+    public void set(String propName, Object value) {
+        if (!this.owner.loaded)
+            return;
+
+        if (!this.properties.containsKey(propName)) {
+            System.out.println(String.format("Property %s does not exist!", propName));
+            return;
+        }
+
+        ShaderProperty prop = this.properties.get(propName);
+
+        if (value.getClass() != prop.Type){
+            System.out.println(String.format("%s variable %s does not take value type %s", this.owner.name, propName, value.getClass()));
+            return;
+        }
+
+        if (prop.Value != null && prop.Value == value)
+            return;
+
+        prop.Value = value;
+
+        if (this.owner.started)
+            prop.Set();
+        else
+            this.changed = true;
+    }
+}

src/com/osufx/sunpy/Shader.java

@@ -0,0 +1,213 @@
+package com.osufx.sunpy;
+
+import org.lwjgl.BufferUtils;
+import org.lwjgl.opengl.GL11;
+import org.lwjgl.opengl.GL20;
+import org.newdawn.slick.util.Log;
+import org.newdawn.slick.util.ResourceLoader;
+
+import java.io.InputStream;
+import java.nio.Buffer;
+import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
+import java.util.*;
+
+public class Shader {
+    public String name;
+    public int programId = -1;
+    public boolean loaded = false;
+    public boolean started = false;
+
+    public PropertyCollection Properties;
+
+    public static HashMap<String, Object> globalProperties = new HashMap<>();
+    public static List<Shader> loadedShaders = new ArrayList<>();
+    public static int currentShader = 0;
+
+    public HashMap<String, Integer> attribLoc = new HashMap<>();
+    private static final String[] attribs = new String[] {
+            "m_Position",
+            "m_Color",
+            "m_TexCoord",
+            "m_Time",
+            "m_Direction"
+    };
+
+    private HashMap<Integer, String> shaderParts = new HashMap<>();
+    private int previousShader;
+
+    public Shader(String vertexShader, String fragmentShader) {
+        String vertexString;
+        String fragmentString;
+
+        try {
+            InputStream vertexStream = ResourceLoader.getResourceAsStream(vertexShader);
+            vertexString = convertStreamToString(vertexStream);
+
+            InputStream fragmentStream = ResourceLoader.getResourceAsStream(fragmentShader);
+            fragmentString = convertStreamToString(fragmentStream);
+        } catch (Exception e){
+            e.printStackTrace();
+            return;
+        }
+
+        this.name = String.format("%s/%s", vertexShader, fragmentShader);
+        this.Properties = new PropertyCollection(this);
+
+        this.programId = GL20.glCreateProgram();
+
+        this.shaderParts.put(GL20.glCreateShader(GL20.GL_VERTEX_SHADER), vertexString);
+        this.shaderParts.put(GL20.glCreateShader(GL20.GL_FRAGMENT_SHADER), fragmentString);
+        this.CompileParts();
+        this.Compile();
+    }
+
+    public Shader(String shader, final int shaderType) {
+        if (shaderType != GL20.GL_FRAGMENT_SHADER && shaderType != GL20.GL_VERTEX_SHADER){
+            System.out.println("Invalid shader type");
+            return;
+        }
+
+        String shaderString;
+
+        try {
+            InputStream shaderStream = ResourceLoader.getResourceAsStream(shader);
+            shaderString = convertStreamToString(shaderStream);
+        } catch (Exception e) {
+            e.printStackTrace();
+            return;
+        }
+
+        this.name = String.format("%s/%s",
+                shaderType == GL20.GL_FRAGMENT_SHADER ? "Fragment" : "Vertex",
+                shader);
+        this.Properties = new PropertyCollection(this);
+
+        this.programId = GL20.glCreateProgram();
+
+        this.shaderParts.put(GL20.glCreateShader(shaderType), shaderString);
+        this.CompileParts();
+        this.Compile();
+    }
+
+    public void CompileParts() {
+        for (Map.Entry<Integer, String> entry : this.shaderParts.entrySet()) {
+            int handle = entry.getKey();
+            String source = entry.getValue();
+
+            GL20.glShaderSource(handle, source);
+            GL20.glCompileShader(handle);
+
+            int res = GL20.glGetShaderi(handle, GL20.GL_COMPILE_STATUS);
+            if (res != GL11.GL_TRUE) {
+                String error = GL20.glGetShaderInfoLog(handle, 1024);
+                Log.error("Shader compilation failed.", new Exception(error));
+            }
+        }
+    }
+
+    public void Compile() {
+        this.Properties.Clear();
+
+        for (int handler : this.shaderParts.keySet()) {
+            GL20.glAttachShader(this.programId, handler);
+        }
+
+        GL20.glLinkProgram(this.programId);
+
+        int res = GL20.glGetProgrami(this.programId, GL20.GL_LINK_STATUS);
+        if (res != GL11.GL_TRUE) {
+            String error = GL20.glGetProgramInfoLog(this.programId, 1024);
+            Log.error("Program linking failed.", new Exception(error));
+        }
+
+        for (int handler : this.shaderParts.keySet()) {
+            GL20.glDeleteShader(handler);
+        }
+
+        for (int i = 0; i < attribs.length; i++) {
+            int attrib = GL20.glGetAttribLocation(this.programId, attribs[i]);
+            this.attribLoc.put(attribs[i], attrib);
+            //GL20.glBindAttribLocation(this.programId, i, attribLoc[i]);
+        }
+
+        /*for (int handler : this.shaderParts.keySet()) {
+            GL20.glDetachShader(this.programId, handler);
+        }*/
+
+        this.loaded = res == GL11.GL_TRUE;
+
+        if (this.loaded) {
+            int uniCount = GL20.glGetProgrami(this.programId, GL20.GL_ACTIVE_UNIFORMS);
+
+            for (int i = 0; i < uniCount; i++) {
+                IntBuffer length = BufferUtils.createIntBuffer(1);
+                IntBuffer size = BufferUtils.createIntBuffer(1);
+                IntBuffer type = BufferUtils.createIntBuffer(1);
+                ByteBuffer name = ByteBuffer.allocateDirect(64);
+
+                GL20.glGetActiveUniform(this.programId, i, length, size, type, name);
+
+
+                byte[] buf = new byte[length.get(0)];
+
+                name.get(buf, 0, buf.length);
+                String propName = new String(buf);
+                int propLocation = GL20.glGetUniformLocation(programId, propName);
+
+                UniformType propUniformType = UniformType.map.get(type.get(0));
+                Class propType = ShaderProperty.ConvertType(propUniformType.name());
+
+                System.out.println(String.format("propName:%s PropUniformType:%s PropType:%s", propName, propUniformType, propType));
+
+                this.Properties.Add(new ShaderProperty(
+                        propName,
+                        propLocation,
+                        propType,
+                        propUniformType
+                ));
+            }
+
+            for (Map.Entry<String, Object> entry : globalProperties.entrySet()) {
+                this.Properties.Replace(entry.getKey(), entry.getValue());
+            }
+
+            loadedShaders.add(this);
+        }
+    }
+
+    public void Begin(){
+        if (this.started || !this.loaded)
+            return;
+
+        GL20.glUseProgram(this.programId);
+        this.previousShader = currentShader;
+        currentShader = this.programId;
+
+        GL20.glEnableVertexAttribArray(this.attribLoc.get("m_Position"));
+        GL20.glEnableVertexAttribArray(this.attribLoc.get("m_TexCoord"));
+
+        //this.Properties.set("m_Sampler", 0);
+
+        this.started = true;
+    }
+
+    public void End() {
+        if (!this.started)
+            return;
+
+        GL11.glFlush();
+        GL20.glDisableVertexAttribArray(this.attribLoc.get("m_TexCoord"));
+        GL20.glDisableVertexAttribArray(this.attribLoc.get("m_Position"));
+
+        GL20.glUseProgram(this.previousShader);
+        currentShader = this.previousShader;
+
+        this.started = false;
+    }
+
+    static String convertStreamToString(InputStream is) {
+        Scanner s = new Scanner(is).useDelimiter("\\A");
+        return s.hasNext() ? s.next() : "";
+    }
+}

src/com/osufx/sunpy/ShaderProperty.java

@@ -0,0 +1,134 @@
+package com.osufx.sunpy;
+
+import org.lwjgl.BufferUtils;
+import org.lwjgl.opengl.GL20;
+
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
+
+public class ShaderProperty {
+    public String Name;
+    public int Location;
+
+    public Class Type;
+    public UniformType ActiveUniformType;
+
+    public Object Value;
+
+    public ShaderProperty(String Name, int Location, Class Type, UniformType ActiveUniformType) {
+        this.Name = Name;
+        this.Location = Location;
+        this.Type = Type;
+        this.ActiveUniformType = ActiveUniformType;
+    }
+
+    public void Set() {
+        if (Value == null)
+            return;
+
+        switch (this.ActiveUniformType) {
+            case Bool:
+                GL20.glUniform1(this.Location, IntBuffer.wrap( new int[]{ (boolean)Value ? 1 : 0 } ));
+                break;
+            case Int:
+                GL20.glUniform1(this.Location, IntBuffer.wrap( new int[]{ (int)Value } ));
+                break;
+            case Float:
+                GL20.glUniform1f(this.Location, (float)Value);
+                break;
+            case BoolVec2:
+                GL20.glUniform2(this.Location, IntBuffer.wrap( boolArrayToIntArray( (boolean[])Value ) ));
+                break;
+            case IntVec2:
+                GL20.glUniform2(this.Location, IntBuffer.wrap( (int[])Value ));
+                break;
+            case FloatVec2:
+                float[] value = (float[])Value;
+                GL20.glUniform2f(this.Location, value[0], value[1]);
+                break;
+            case FloatMat2:
+                GL20.glUniformMatrix2(this.Location, false, FloatBuffer.wrap( (float[])Value ));
+                break;
+            case BoolVec3:
+                GL20.glUniform3(this.Location, IntBuffer.wrap( boolArrayToIntArray( (boolean[])Value ) ));
+                break;
+            case IntVec3:
+                GL20.glUniform3(this.Location, IntBuffer.wrap( (int[])Value ));
+                break;
+            case FloatVec3:
+                GL20.glUniform3(this.Location, FloatBuffer.wrap( (float[])Value ));
+                break;
+            case FloatMat3:
+                GL20.glUniformMatrix3(this.Location, false, FloatBuffer.wrap( (float[])Value ));
+                break;
+            case BoolVec4:
+                GL20.glUniform4(this.Location, IntBuffer.wrap( boolArrayToIntArray( (boolean[])Value ) ));
+                break;
+            case IntVec4:
+                GL20.glUniform4(this.Location, IntBuffer.wrap( (int[])Value ));
+                break;
+            case FloatVec4:
+                GL20.glUniform4(this.Location, FloatBuffer.wrap( (float[])Value ));
+                break;
+            case FloatMat4:
+                GL20.glUniformMatrix4(this.Location, false, FloatBuffer.wrap( (float[])Value ));
+                break;
+            case Sampler2D:
+                GL20.glUniform1i(this.Location, (int) Value);
+                break;
+        }
+    }
+
+    public static Class ConvertType(String type) {
+        switch (type) {
+            default:
+                //throw new Exception(String.format("Uniform type %s is not supported.", type));
+                System.out.println(String.format("Uniform type %s is not supported.", type));
+                return null;
+            case "Bool":
+                return Boolean.class;
+            case "Int":
+                return Integer.class;
+            case "Float":
+                return Float.class;
+            case "BoolVec2":
+                return boolean[].class;
+            case "IntVec2":
+                return int[].class;
+            case "FloatVec2":
+                return float[].class;
+            case "BoolVec3":
+                return boolean[].class;
+            case "IntVec3":
+                return int[].class;
+            case "FloatVec3":
+                return float[].class;
+            case "BoolVec4":
+                return boolean[].class;
+            case "IntVec4":
+                return int[].class;
+            case "FloatVec4":
+                return float[].class;
+            case "FloatMat2":
+                return float[].class;
+            case "FloatMat3":
+                return float[].class;
+            case "FloatMat4":
+                return float[].class;
+            case "Sampler2D":
+            case "SamplerCube":
+                return Integer.class;
+        }
+    }
+
+    /*public static Type ConvertType(int type) {
+        (UniformType)24;
+    }*/
+
+    public static int[] boolArrayToIntArray(boolean[] array) {
+        int[] value = new int[array.length];
+        for (int i = 0; i < array.length; i++)
+            value[i] = array[i] ? 1 : 0;
+        return value;
+    }
+}

src/com/osufx/sunpy/UniformType.java

@@ -0,0 +1,39 @@
+package com.osufx.sunpy;
+
+import org.lwjgl.opengl.GL11;
+import org.lwjgl.opengl.GL20;
+
+import java.util.HashMap;
+
+public enum UniformType {
+    Int(GL11.GL_INT),
+    Float(GL11.GL_FLOAT),
+    FloatVec2(GL20.GL_FLOAT_VEC2),
+    FloatVec3(GL20.GL_FLOAT_VEC3),
+    FloatVec4(GL20.GL_FLOAT_VEC4),
+    IntVec2(GL20.GL_INT_VEC2),
+    IntVec3(GL20.GL_INT_VEC3),
+    IntVec4(GL20.GL_INT_VEC4),
+    Bool(GL20.GL_BOOL),
+    BoolVec2(GL20.GL_BOOL_VEC2),
+    BoolVec3(GL20.GL_BOOL_VEC3),
+    BoolVec4(GL20.GL_BOOL_VEC4),
+    FloatMat2(GL20.GL_FLOAT_MAT2),
+    FloatMat3(GL20.GL_FLOAT_MAT3),
+    FloatMat4(GL20.GL_FLOAT_MAT4),
+    Sampler2D(GL20.GL_SAMPLER_2D),
+    SamplerCube(GL20.GL_SAMPLER_CUBE);
+
+    private final int glIndex;
+
+    public static HashMap<Integer, UniformType> map = new HashMap<>();
+    static {
+        for (UniformType v : UniformType.values()) {
+            map.put(v.glIndex, v);
+        }
+    }
+
+    UniformType(int glIndex) {
+        this.glIndex = glIndex;
+    }
+}

src/itdelatrisu/opsu/GameData.java

@@ -170,7 +170,7 @@ public class GameData {
 		HIT_ANIMATION_RESULT = 12;  // not a hit result
 
 	/** Hit result-related images (indexed by HIT_* constants to HIT_MAX). */
-	private Image[] hitResults;
+	public static Image[] hitResults;
 
 	/** Counts of each hit result so far (indexed by HIT_* constants to HIT_MAX). */
 	private int[] hitResultCount;
@@ -1222,7 +1222,7 @@ public class GameData {
 	/**
 	 * Increases the combo streak by one.
 	 */
-	private void incrementComboStreak() {
+	protected void incrementComboStreak() {
 		combo++;
 		comboPopTime = 0;
 		if (combo > comboMax)
@@ -1404,7 +1404,7 @@ public class GameData {
 	 * @param noIncrementCombo if the combo should not be incremented by this result
 	 * @return the actual hit result (HIT_* constants)
 	 */
-	private int handleHitResult(int time, int result, float x, float y, Color color, boolean end,
+	protected int handleHitResult(int time, int result, float x, float y, Color color, boolean end,
 			HitObject hitObject, HitObjectType hitResultType, int repeat, boolean noIncrementCombo) {
 		// update health, score, and combo streak based on hit result
 		int hitValue = 0;

src/itdelatrisu/opsu/objects/Circle.java

@@ -83,6 +83,13 @@ public class Circle extends GameObject {
 		super.updateStartEndPositions(time);
 	}
 
+	@Override
+	public GameObject clone(GameData data) {
+		Circle c = new Circle(hitObject, game, data, comboColorIndex, comboEnd);
+		c.isreplay = true;
+		return c;
+	}
+
 	@Override
 	public void draw(Graphics g, int trackPosition, boolean mirror) {
 		Color orig = color;
@@ -165,12 +172,13 @@ public class Circle extends GameObject {
 		return false;
 	}
 
+	private boolean isreplay;
 	@Override
 	public boolean update(boolean overlap, int delta, int mouseX, int mouseY, boolean keyPressed, int trackPosition) {
 		int time = hitObject.getTime();
 
 		int[] hitResultOffset = game.getHitResultOffsets();
-		boolean isAutoMod = GameMod.AUTO.isActive();
+		boolean isAutoMod = !isreplay && GameMod.AUTO.isActive();
 
 		if (trackPosition > time + hitResultOffset[GameData.HIT_50]) {
 			if (isAutoMod) {// "auto" mod: catch any missed notes due to lag

src/itdelatrisu/opsu/objects/DummyObject.java

@@ -18,6 +18,7 @@
 
 package itdelatrisu.opsu.objects;
 
+import itdelatrisu.opsu.GameData;
 import itdelatrisu.opsu.beatmap.HitObject;
 import itdelatrisu.opsu.objects.curves.Vec2f;
 
@@ -29,7 +30,7 @@ import org.newdawn.slick.Graphics;
  */
 public class DummyObject extends GameObject {
 	/** The associated HitObject. */
-	private HitObject hitObject;
+	public final HitObject hitObject;
 
 	/** The scaled starting x, y coordinates. */
 	private float x, y;
@@ -49,6 +50,11 @@ public class DummyObject extends GameObject {
 		updateStartEndPositions(0);
 	}
 
+	@Override
+	public GameObject clone(GameData a) {
+		return new DummyObject(this.hitObject);
+	}
+
 	@Override
 	public void draw(Graphics g, int trackPosition, boolean mirror) {}
 

src/itdelatrisu/opsu/objects/GameObject.java

@@ -18,6 +18,7 @@
 
 package itdelatrisu.opsu.objects;
 
+import itdelatrisu.opsu.GameData;
 import itdelatrisu.opsu.objects.curves.Vec2f;
 
 import org.newdawn.slick.Color;
@@ -114,4 +115,6 @@ public abstract class GameObject {
 		return hue;
 	}
 
+	public abstract GameObject clone(GameData data);
+
 }

src/itdelatrisu/opsu/objects/Slider.java

@@ -189,6 +189,13 @@ public class Slider extends GameObject {
 		repeats = hitObject.getRepeatCount();
 	}
 
+	@Override
+	public GameObject clone(GameData data) {
+		Slider s = new Slider(hitObject, game, data, comboColorIndex, comboEnd);
+		s.isreplay = true;
+		return s;
+	}
+
 	@Override
 	public void draw(Graphics g, int trackPosition, boolean mirror) {
 		if (trackPosition > getEndTime()) {
@@ -630,11 +637,12 @@ public class Slider extends GameObject {
 		return false;
 	}
 
+	boolean isreplay;
 	@Override
 	public boolean update(boolean overlap, int delta, int mouseX, int mouseY, boolean keyPressed, int trackPosition) {
 		int repeatCount = hitObject.getRepeatCount();
 		int[] hitResultOffset = game.getHitResultOffsets();
-		boolean isAutoMod = GameMod.AUTO.isActive();
+		boolean isAutoMod = !isreplay && GameMod.AUTO.isActive();
 
 		if (!sliderClickedInitial) {
 			int time = hitObject.getTime();

src/itdelatrisu/opsu/objects/Spinner.java

@@ -18,6 +18,7 @@
 
 package itdelatrisu.opsu.objects;
 
+import awlex.ospu.FakeGameObject;
 import itdelatrisu.opsu.GameData;
 import itdelatrisu.opsu.GameData.HitObjectType;
 import itdelatrisu.opsu.GameImage;
@@ -170,6 +171,12 @@ public class Spinner extends GameObject {
 		rotationsNeeded = spinsPerMinute * (hitObject.getEndTime() - hitObject.getTime()) / 60000f;
 	}
 
+	@Override
+	public GameObject clone(GameData data) {
+		//return new DummyObject(hitObject);
+		return new Spinner(hitObject, game, data);
+	}
+
 	@Override
 	public void draw(Graphics g, int trackPosition, boolean mirror) {
 		if (mirror) {

src/itdelatrisu/opsu/render/CurveRenderState.java

@@ -17,6 +17,7 @@
  */
 package itdelatrisu.opsu.render;
 
+import com.osufx.sunpy.Shader;
 import itdelatrisu.opsu.GameImage;
 import itdelatrisu.opsu.Utils;
 import itdelatrisu.opsu.beatmap.HitObject;
@@ -248,7 +249,7 @@ public class CurveRenderState {
 		GL11.glTexParameteri(GL11.GL_TEXTURE_1D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
 		GL11.glTexParameteri(GL11.GL_TEXTURE_1D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP);
 
-		GL20.glUseProgram(0);
+		GL20.glUseProgram(Shader.currentShader);
 
 		GL11.glMatrixMode(GL11.GL_PROJECTION);
 		GL11.glPushMatrix();

src/itdelatrisu/opsu/states/Game.java

@@ -45,6 +45,8 @@ import itdelatrisu.opsu.ui.animations.AnimatedValue;
 import itdelatrisu.opsu.ui.animations.AnimationEquation;
 
 import java.io.File;
+import java.io.FileFilter;
+import java.io.IOException;
 import java.util.*;
 
 import org.lwjgl.input.Keyboard;
@@ -57,6 +59,7 @@ import org.newdawn.slick.Input;
 import org.newdawn.slick.SlickException;
 import org.newdawn.slick.util.Log;
 import yugecin.opsudance.*;
+import yugecin.opsudance.ReplayPlayback.HitData;
 import yugecin.opsudance.core.state.ComplexOpsuState;
 import yugecin.opsudance.objects.curves.FakeCombinedCurve;
 import yugecin.opsudance.options.OptionGroups;
@@ -304,7 +307,7 @@ public class Game extends ComplexOpsuState {
 		MUSICBAR_HOVER  = new Color(12, 9, 10, 0.35f),
 		MUSICBAR_FILL   = new Color(255, 255, 255, 0.75f);
 
-	private final Cursor mirrorCursor;
+	private Cursor mirrorCursor;
 	private final MoveStoryboard moveStoryboardOverlay;
 	private final StoryboardOverlay storyboardOverlay;
 	private final OptionsOverlay optionsOverlay;
@@ -315,7 +318,7 @@ public class Game extends ComplexOpsuState {
 
 	public Game() {
 		super();
-		mirrorCursor = new Cursor(true);
+		//mirrorCursor = new Cursor(true);
 		this.moveStoryboardOverlay = new MoveStoryboard();
 		this.optionsOverlay = new OptionsOverlay(OptionGroups.storyboardOptions);
 		this.storyboardOverlay = new StoryboardOverlay(moveStoryboardOverlay, optionsOverlay, this);
@@ -711,7 +714,7 @@ public class Game extends ComplexOpsuState {
 		} else {
 			displayContainer.cursor.draw(Utils.isGameKeyPressed());
 		}
-		
+
 		super.render(g);
 
 		if (OPTION_DANCE_ENABLE_SB.state) {
@@ -722,12 +725,34 @@ public class Game extends ComplexOpsuState {
 		}
 
 		UI.draw(g);
+
+		if (replayCursors == null) {
+			return;
+		}
+
+		//g.setColor(new Color(0.2f, 0.2f, 0.2f));
+		//g.fillRect(0, 0, ReplayPlayback.SQSIZE * 2, displayContainer.height);
+		//g.setColor(Color.black);
+		//g.fillRect(ReplayPlayback.SQSIZE * 2, 0, ReplayPlayback.SQSIZE * 2, displayContainer.height);
+		float totalHeight = 0f;
+		for (ReplayPlayback replayPlayback : replays) {
+			totalHeight += replayPlayback.getHeight();
+		}
+		float ypos = (height - totalHeight) / 2f - ReplayPlayback.lineHeight;
+		for (ReplayPlayback replayPlayback : replays) {
+			float h = replayPlayback.getHeight();
+			ypos += h;
+			//if (h > 0f) {
+				replayPlayback.render(renderDelta, g, ypos, trackPosition);
+			//}
+		}
+		replayCursors.draw();
 	}
 
 	@Override
 	public void preRenderUpdate() {
 		super.preRenderUpdate();
-		
+
 		if (OPTION_DANCE_ENABLE_SB.state) {
 			optionsOverlay.preRenderUpdate();
 			if (optionsOverlay.isActive()) {
@@ -910,6 +935,7 @@ public class Game extends ComplexOpsuState {
 
 			// set mouse coordinates
 			autoMousePosition.set(autoPoint.x, autoPoint.y);
+			autoMousePosition.set(-100, -100);
 		}
 
 		if (isReplay) {
@@ -1404,7 +1430,7 @@ public class Game extends ComplexOpsuState {
 		if (super.keyReleased(key, c)) {
 			return true;
 		}
-		
+
 		if (gameFinished) {
 			return true;
 		}
@@ -1441,7 +1467,7 @@ public class Game extends ComplexOpsuState {
 		if (OPTION_DANCE_ENABLE_SB.state && optionsOverlay.mouseWheelMoved(newValue)) {
 			return true;
 		}
-		
+
 		if (super.mouseWheelMoved(newValue)) {
 			return true;
 		}
@@ -1454,6 +1480,16 @@ public class Game extends ComplexOpsuState {
 		return true;
 	}
 
+	static class ReplayData {
+		final HitData hitdata;
+		final Replay replay;
+		ReplayData(HitData hitdata, Replay replay) {
+			this.hitdata = hitdata;
+			this.replay = replay;
+		}
+	}
+	private ReplayPlayback[] replays;
+	private ReplayCursors replayCursors;
 	@Override
 	public void enter() {
 		overlays.clear();
@@ -1465,7 +1501,84 @@ public class Game extends ComplexOpsuState {
 
 		super.enter();
 
-		displayContainer.drawCursor = false;
+		/*
+		File replaydir = new File("d:/Users/Robin/games/osu/osr-stuff-master/xi/");
+		if (!replaydir.exists()) {
+			bubNotifs.sendf(Colors.BUB_RED, "replay folder '%s' does not exist", replaydir.getAbsolutePath());
+			displayContainer.switchStateInstantly(songMenuState);
+			return;
+		}
+
+		File[] files = replaydir.listFiles(new FileFilter() {
+			@Override
+			public boolean accept(File pathname) {
+				return pathname.getName().endsWith(".osr");
+			}
+		});
+
+		if (replayCursors != null) {
+			replayCursors.destroy();
+		}
+		final ArrayList<ReplayData> rdata = new ArrayList<>(50);
+		for (File file : files) {
+			final String datafilename = file.getName().substring(0, file.getName().length() - 3) + "ope";
+			final File hitdatafile = new File(file.getParentFile(), datafilename);
+			if (!hitdatafile.exists()) {
+				bubNotifs.sendf(Colors.BUB_RED, "no hitdata file for %s", file.getName());
+				continue;
+			}
+			final ReplayPlayback.HitData hitdata;
+			try {
+				hitdata = new ReplayPlayback.HitData(hitdatafile);
+			} catch (Exception e) {
+				bubNotifs.sendf(
+					Colors.BUB_RED,
+					"cannot parse hitdata for '%s': %s",
+					hitdatafile.getName(),
+					e.toString()
+				);
+				continue;
+			}
+			final Replay r = new Replay(file);
+			try {
+				r.load();
+			} catch (IOException e) {
+				bubNotifs.sendf(Colors.BUB_RED, "could not load replay %s", file.getName());
+				continue;
+			}
+			rdata.add(new ReplayData(hitdata, r));
+		}
+
+		rdata.sort(new Comparator<ReplayData>() {
+			@Override
+			public int compare(ReplayData o1, ReplayData o2) {
+				return Integer.compare(o2.replay.score, o1.replay.score);
+			}
+		});
+
+		replayCursors = new ReplayCursors(rdata.size());
+		replays = new ReplayPlayback[rdata.size()];
+
+		float hueshift = 360f / rdata.size();
+		float hue = 180;
+
+		int replayidx = 0;
+		for (ReplayData d : rdata) {
+			final Color c = new Color(java.awt.Color.HSBtoRGB((hue) / 360f, .7f, 1.0f));
+			final ReplayCursor cursor = new ReplayCursor(c);
+			replays[replayidx] = new ReplayPlayback(
+				d.replay,
+				d.hitdata,
+				c,
+				cursor
+			);
+			replayCursors.playbacks[replayidx] = replays[replayidx];
+
+			hue += hueshift;
+			replayidx++;
+		}
+
+		displayContainer.drawCursor = false;*/
 
 		isInGame = true;
 		if (!skippedToCheckpoint) {
@@ -1740,7 +1853,7 @@ public class Game extends ComplexOpsuState {
 		if (OPTION_DANCE_ENABLE_SB.state) {
 			storyboardOverlay.onLeave();
 		}
-		
+
 		optionsOverlay.hide();
 
 		isInGame = false;
@@ -1749,6 +1862,12 @@ public class Game extends ComplexOpsuState {
 
 		knorkesliders = null;
 
+		if (replayCursors != null) {
+			replayCursors.destroy();
+			replayCursors = null;
+			replays = null;
+		}
+
 		Dancer.instance.setGameObjects(null);
 
 		Cursor.lastObjColor = Color.white;
@@ -1765,11 +1884,7 @@ public class Game extends ComplexOpsuState {
 		if (isReplay)
 			GameMod.loadModState(previousMods);
 	}
-	
-	/**
-	 * Adjusts the beatmap's local music offset.
-	 * @param sign the sign (multiplier)
-	 */
+
 	public void adjustLocalMusicOffset(int amount) {
 		int newOffset = beatmap.localMusicOffset + amount;
 		barNotifs.send(String.format("Local beatmap offset set to %dms", newOffset));

src/itdelatrisu/opsu/ui/Cursor.java

@@ -18,18 +18,31 @@
 
 package itdelatrisu.opsu.ui;
 
+import com.osufx.sunpy.Shader;
 import itdelatrisu.opsu.GameImage;
 import itdelatrisu.opsu.Utils;
+import itdelatrisu.opsu.render.Rendertarget;
 import itdelatrisu.opsu.ui.animations.AnimationEquation;
 
 import java.awt.Point;
+import java.nio.IntBuffer;
+import java.util.Iterator;
 import java.util.LinkedList;
 
+import org.lwjgl.BufferUtils;
+import org.lwjgl.opengl.*;
 import org.newdawn.slick.*;
+import org.newdawn.slick.opengl.Texture;
+import org.newdawn.slick.opengl.TextureImpl;
+
 import yugecin.opsudance.Dancer;
+import yugecin.opsudance.ReplayPlayback;
 import yugecin.opsudance.skinning.SkinService;
 
 import static yugecin.opsudance.options.Options.*;
+import static itdelatrisu.opsu.GameImage.CURSOR;
+import static itdelatrisu.opsu.GameImage.CURSOR_MIDDLE;
+import static itdelatrisu.opsu.GameImage.CURSOR_TRAIL;
 import static yugecin.opsudance.core.InstanceContainer.*;
 
 /**
@@ -55,8 +68,7 @@ public class Cursor {
 	/** The time it takes for the cursor to scale, in milliseconds. */
 	private static final float CURSOR_SCALE_TIME = 125;
 
-	/** Stores all previous cursor locations to display a trail. */
-	private LinkedList<Point> trail = new LinkedList<>();
+	private TrailList trail = new TrailList();
 
 	private boolean newStyle;
 
@@ -68,6 +80,12 @@ public class Cursor {
 
 	private boolean isMirrored;
 
+	private Color filter;
+	
+	private Rendertarget fbo;
+
+	private Shader cursorTrailShader;
+
 	public Cursor() {
 		this(false);
 	}
@@ -75,6 +93,14 @@ public class Cursor {
 	public Cursor(boolean isMirrored) {
 		resetLocations(0, 0);
 		this.isMirrored = isMirrored;
+		this.lastPosition = new Point(width2, 0);
+		this.filter = new Color(255,255,255);
+		this.cursorTrailShader = new Shader("sh_Cursor.vertex", "sh_Texture.frag");
+	}
+
+	public Cursor(Color filter) {
+		this(false);
+		this.filter = filter;
 	}
 
 	/**
@@ -82,6 +108,10 @@ public class Cursor {
 	 * @param mousePressed whether or not the mouse button is pressed
 	 */
 	public void draw(boolean mousePressed) {
+		if (fbo == null) {
+			this.fbo = Rendertarget.createRTTFramebuffer(width, height);
+		}
+		/*
 		if (OPTION_DISABLE_CURSOR.state) {
 			return;
 		}
@@ -131,6 +161,10 @@ public class Cursor {
 			lastCursorColor = filter = Dancer.cursorColorOverride.getColor();
 		}
 
+		if (this.filter != null) {
+			filter = this.filter;
+		}
+
 		// draw a fading trail
 		float alpha = 0f;
 		float t = 2f / trail.size();
@@ -139,7 +173,7 @@ public class Cursor {
 		cursorTrail.startUse();
 		for (Point p : trail) {
 			alpha += t;
-			cursorTrail.setImageColor(filter.r, filter.g, filter.b, alpha);
+			cursorTrail.setImageColor(filter.r, filter.g, filter.b, alpha * 0.25f);
 			cursorTrail.drawEmbedded(
 					p.x - (cursorTrailWidth / 2f), p.y - (cursorTrailHeight / 2f),
 					cursorTrailWidth, cursorTrailHeight, cursorTrailRotation);
@@ -157,6 +191,110 @@ public class Cursor {
 		if (hasMiddle) {
 			cursorMiddle.drawCentered(lastPosition.x, lastPosition.y, OPTION_DANCE_CURSOR_ONLY_COLOR_TRAIL.state ? Color.white : filter);
 		}
+		*/
+		final Image img = CURSOR_TRAIL.getImage();
+		final Texture txt = img.getTexture();
+
+		final float trailw2 = img.getWidth() * OPTION_CURSOR_SIZE.val / 100f / 2f;
+		final float trailh2 = img.getHeight() * OPTION_CURSOR_SIZE.val / 100f / 2f;
+		float txtw = txt.getWidth();
+		float txth = txt.getHeight();
+
+		//img.draw(0f,0f);
+
+		/*
+		// stuff copied from CurveRenderState and stuff, I don't know what I'm doing
+		int oldFb = GL11.glGetInteger(EXTFramebufferObject.GL_FRAMEBUFFER_BINDING_EXT);
+		int oldTex = GL11.glGetInteger(GL11.GL_TEXTURE_BINDING_2D);
+		IntBuffer oldViewport = BufferUtils.createIntBuffer(16);
+		GL11.glGetInteger(GL11.GL_VIEWPORT, oldViewport);
+		EXTFramebufferObject.glBindFramebufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT, fbo.getID());
+		GL11.glViewport(0, 0, fbo.width, fbo.height);
+		GL11.glClearColor(0f, 0f, 0f, 0f);
+		GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
+*/
+		//Color.white.bind();
+
+
+		//GL20.glVertexAttrib4f(cursorTrailShader.attribLoc.get("m_Position"), 1f, 1f, 1f, 1f);
+
+
+		//GL11.glBindTexture(GL11.GL_TEXTURE_2D, );
+		//cursorTrailShader.Properties.set("m_Sampler", txt.getTextureID());
+
+		//GL20.glUniform1i(cursorTrailShader.attribLoc.get("m_Sampler"), txt.getTextureID());
+		//IntBuffer buf = BufferUtils.createIntBuffer(1).put(txt.getTextureID());
+
+		cursorTrailShader.Begin();
+		GL13.glActiveTexture(GL13.GL_TEXTURE5);
+		//GL11.glEnable(GL11.GL_TEXTURE_2D);
+		//GL11.glGenTextures();
+
+
+		//txt.bind();
+		//TextureImpl.unbind();
+		GL11.glBindTexture(GL11.GL_TEXTURE_2D, txt.getTextureID());
+		//GL33.glBindSampler(GL20.GL_SAMPLER_2D, txt.getTextureID());
+		//GL20.glUniform1i(cursorTrailShader.attribLoc.get("m_Sampler"), 0);
+
+		//cursorTrailShader.Properties.set("m_TexCoord", new float[] { txtw, txth });
+		int idd = GL20.glGetAttribLocation(cursorTrailShader.programId, "m_TexCoord");
+
+		cursorTrailShader.Properties.set("m_Sampler", 5);
+		//GL20.glUniform1i(cursorTrailShader.Properties.get("m_Sampler").Location, 5);
+
+
+
+		cursorTrailShader.Properties.set("g_FadeClock", 0.04f);
+		GL11.glBegin(GL11.GL_QUADS);
+		float alpha = 0f;
+		float alphaIncrease = .4f / trail.size;
+		for (Trailpart p : trail) {
+			//alpha += alphaIncrease;
+			//GL11.glColor4f(filter.r, filter.g, filter.b, 1f);
+			GL11.glTexCoord2f(0f, 0f);
+			GL20.glVertexAttrib2f(idd, 0f, 0f);
+			GL11.glVertex3f(p.x - trailw2, p.y - trailh2, 0f);
+			GL11.glTexCoord2f(txtw, 0);
+			GL20.glVertexAttrib2f(idd, txtw, 0);
+			GL11.glVertex3f(p.x + trailw2, p.y - trailh2, 0f);
+			GL11.glTexCoord2f(txtw, txth);
+			GL20.glVertexAttrib2f(idd, txtw, txth);
+			GL11.glVertex3f(p.x + trailw2, p.y + trailh2, 0f);
+			GL11.glTexCoord2f(0f, txth);
+			GL20.glVertexAttrib2f(idd, 0f, txth);
+			GL11.glVertex3f(p.x - trailw2, p.y + trailh2, 0f);
+			//break;
+		}
+		GL11.glEnd();
+		cursorTrailShader.End();
+
+		GL13.glActiveTexture(GL13.GL_TEXTURE0);
+
+		/*
+		GL11.glBindTexture(GL11.GL_TEXTURE_2D, oldTex);
+		EXTFramebufferObject.glBindFramebufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT, oldFb);
+		GL11.glViewport(oldViewport.get(0), oldViewport.get(1), oldViewport.get(2), oldViewport.get(3));
+
+		GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE);
+		//GL11.glEnable(GL11.GL_TEXTURE_2D);
+		//GL11.glDisable(GL11.GL_TEXTURE_1D);
+		GL11.glBindTexture(GL11.GL_TEXTURE_2D, fbo.getTextureID());
+		GL11.glBegin(GL11.GL_QUADS);
+		GL11.glColor4f(1f, 1f, 1f, 1f);
+		GL11.glTexCoord2f(1f, 1f);
+		GL11.glVertex2i(fbo.width, 0);
+		GL11.glTexCoord2f(0f, 1f);
+		GL11.glVertex2i(0, 0);
+		GL11.glTexCoord2f(0f, 0f);
+		GL11.glVertex2i(0, fbo.height);
+		GL11.glTexCoord2f(1f, 0f);
+		GL11.glVertex2i(fbo.width, fbo.height);
+		GL11.glEnd();
+		GL14.glBlendFuncSeparate(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA, GL11.GL_ONE, GL11.GL_ONE_MINUS_SRC_ALPHA);
+		*/
+		CURSOR.getScaledImage(OPTION_CURSOR_SIZE.val / 100f).drawCentered(lastPosition.x, lastPosition.y, filter);
+		CURSOR_MIDDLE.getScaledImage(OPTION_CURSOR_SIZE.val / 100f).drawCentered(lastPosition.x, lastPosition.y, filter);
 	}
 
 	/**
@@ -165,34 +303,22 @@ public class Cursor {
 	 * @param mouseY y coordinate to set position to
 	 */
 	public void setCursorPosition(int delta, int mouseX, int mouseY) {
-		// TODO: use an image buffer
-		int removeCount = 0;
-		float FPSmod = Math.max(1000 / Math.max(delta, 1), 1) / 30f; // TODO
-		if (newStyle) {
-			// new style: add all points between cursor movements
-			if ((lastPosition.x == 0 && lastPosition.y == 0) || !addCursorPoints(lastPosition.x, lastPosition.y, mouseX, mouseY)) {
-				trail.add(new Point(mouseX, mouseY));
-			}
-			lastPosition.move(mouseX, mouseY);
+		nowtime = System.currentTimeMillis();
 
-			removeCount = (int) (trail.size() / (6 * FPSmod)) + 1;
-		} else {
-			// old style: sample one point at a time
-			trail.add(new Point(mouseX, mouseY));
+		addCursorPoints(lastPosition.x, lastPosition.y, mouseX, mouseY);
+		lastPosition.move(mouseX, mouseY);
 
-			int max = (int) (10 * FPSmod);
-			if (trail.size() > max)
-				removeCount = trail.size() - max;
+		int removecount = 0;
+		TrailNode newfirst = trail.first;
+		while (newfirst != null && newfirst.value.time < nowtime - 175) {
+			newfirst = newfirst.next;
+			removecount++;
 		}
-
-		int cursortraillength = OPTION_DANCE_CURSOR_TRAIL_OVERRIDE.val;
-		if (cursortraillength > 20) {
-			removeCount = trail.size() - cursortraillength;
+		trail.first = newfirst;
+		if (newfirst == null) {
+			trail.last = null;
 		}
-
-		// remove points from the lists
-		for (int i = 0; i < removeCount && !trail.isEmpty(); i++)
-			trail.remove();
+		trail.size -= removecount;
 	}
 
 	/**
@@ -200,8 +326,8 @@ public class Cursor {
 	 * @author http://rosettacode.org/wiki/Bitmap/Bresenham's_line_algorithm#Java
 	 */
 	private boolean addCursorPoints(int x1, int y1, int x2, int y2) {
+		int size = trail.size;
 		// delta of exact value and rounded value of the dependent variable
-		boolean added = false;
 		int d = 0;
 		int dy = Math.abs(y2 - y1);
 		int dx = Math.abs(x2 - x1);
@@ -211,16 +337,11 @@ public class Cursor {
 		int ix = x1 < x2 ? 1 : -1;  // increment direction
 		int iy = y1 < y2 ? 1 : -1;
 
-		int k = 5;  // sample size
 		if (dy <= dx) {
-			for (int i = 0; ; i++) {
-				if (i == k) {
-					trail.add(new Point(x1, y1));
-					added = true;
-					i = 0;
-				}
+			for (;;) {
 				if (x1 == x2)
 					break;
+				trail.add(new Trailpart(x1, y1));
 				x1 += ix;
 				d += dy2;
 				if (d > dx) {
@@ -229,14 +350,10 @@ public class Cursor {
 				}
 			}
 		} else {
-			for (int i = 0; ; i++) {
-				if (i == k) {
-					trail.add(new Point(x1, y1));
-					added = true;
-					i = 0;
-				}
+			for (;;) {
 				if (y1 == y2)
 					break;
+				trail.add(new Trailpart(x1, y1));
 				y1 += iy;
 				d += dx2;
 				if (d > dy) {
@@ -245,7 +362,64 @@ public class Cursor {
 				}
 			}
 		}
-		return added;
+		return trail.size != size;
+	}
+
+	private static class TrailList implements Iterable<Trailpart>
+	{
+		TrailNode first;
+		TrailNode last;
+		int size;
+
+		public void add(Trailpart t)
+		{
+			if (last == null) {
+				last = first = new TrailNode(t);
+			} else {
+				TrailNode n = new TrailNode(t);
+				last.next = n;
+				last = n;
+			}
+			size++;
+		}
+
+		@Override
+		public Iterator<Trailpart> iterator()
+		{
+			return new Iterator<Trailpart>() {
+				TrailNode node = first;
+				@Override
+				public boolean hasNext() {
+					return node != null;
+				}
+
+				@Override
+				public Trailpart next() {
+					Trailpart v = node.value;
+					node = node.next;
+					return v;
+				}
+			};
+		}
+	}
+
+	private static class TrailNode
+	{
+		TrailNode next;
+		Trailpart value;
+		TrailNode(Trailpart t) {
+			value = t;
+		}
+	}
+
+	private static class Trailpart {
+		int x, y;
+		long time;
+		Trailpart(int x, int y) {
+			this.x = x;
+			this.y = y;
+			this.time = nowtime;
+		}
 	}
 
 	/**
@@ -278,11 +452,7 @@ public class Cursor {
 	 * Resets all cursor location data.
 	 */
 	public void resetLocations(int mouseX, int mouseY) {
-		trail.clear();
-		lastPosition = new Point(mouseX, mouseY);
-		for (int i = 0; i < 50; i++) {
-			trail.add(new Point(lastPosition));
-		}
+
 	}
 
 	/**

src/yugecin/opsudance/ReplayCursor.java

@@ -0,0 +1,191 @@
+/*
+ * opsu! - an open-source osu! client
+ * Copyright (C) 2014, 2015 Jeffrey Han
+ *
+ * opsu! is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * opsu! is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with opsu!.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package yugecin.opsudance;
+
+import java.awt.Point;
+import java.util.Iterator;
+
+import org.lwjgl.opengl.*;
+import org.newdawn.slick.*;
+
+import static itdelatrisu.opsu.GameImage.*;
+import static yugecin.opsudance.core.InstanceContainer.*;
+import static yugecin.opsudance.options.Options.*;
+
+public class ReplayCursor
+{
+	private final Point lastPosition;
+	private TrailList trail = new TrailList();
+
+	public Color filter;
+
+	public ReplayCursor(Color filter) {
+		this.filter = filter;
+		this.lastPosition = new Point(width2, 0);
+	}
+
+	public void drawTrail(float trailw2, float trailh2, float txtw, float txth)
+	{
+		float alpha = 0f;
+		float alphaIncrease = .4f / trail.size;
+		for (Trailpart p : trail) {
+			alpha += alphaIncrease;
+			GL11.glColor4f(filter.r, filter.g, filter.b, alpha);
+			GL11.glTexCoord2f(0f, 0f);
+			GL11.glVertex3f(p.x - trailw2, p.y - trailh2, 0f);
+			GL11.glTexCoord2f(txtw, 0);
+			GL11.glVertex3f(p.x + trailw2, p.y - trailh2, 0f);
+			GL11.glTexCoord2f(txtw, txth);
+			GL11.glVertex3f(p.x + trailw2, p.y + trailh2, 0f);
+			GL11.glTexCoord2f(0f, txth);
+			GL11.glVertex3f(p.x - trailw2, p.y + trailh2, 0f);
+		}
+	}
+	
+	public void drawCursor()
+	{
+		CURSOR.getScaledImage(OPTION_CURSOR_SIZE.val / 100f).drawCentered(lastPosition.x, lastPosition.y, filter);
+		CURSOR_MIDDLE.getScaledImage(OPTION_CURSOR_SIZE.val / 100f).drawCentered(lastPosition.x, lastPosition.y, filter);
+	}
+
+	/**
+	 * Sets the cursor position to given point and updates trail.
+	 * @param mouseX x coordinate to set position to
+	 * @param mouseY y coordinate to set position to
+	 */
+	public void setCursorPosition(int delta, int mouseX, int mouseY) {
+		nowtime = System.currentTimeMillis();
+
+		addCursorPoints(lastPosition.x, lastPosition.y, mouseX, mouseY);
+		lastPosition.move(mouseX, mouseY);
+
+		int removecount = 0;
+		TrailNode newfirst = trail.first;
+		while (newfirst != null && newfirst.value.time < nowtime - 175) {
+			newfirst = newfirst.next;
+			removecount++;
+		}
+		trail.first = newfirst;
+		if (newfirst == null) {
+			trail.last = null;
+		}
+		trail.size -= removecount;
+	}
+
+	/**
+	 * Adds all points between (x1, y1) and (x2, y2) to the cursor point lists.
+	 * @author http://rosettacode.org/wiki/Bitmap/Bresenham's_line_algorithm#Java
+	 */
+	private boolean addCursorPoints(int x1, int y1, int x2, int y2) {
+		int size = trail.size;
+		// delta of exact value and rounded value of the dependent variable
+		int d = 0;
+		int dy = Math.abs(y2 - y1);
+		int dx = Math.abs(x2 - x1);
+
+		int dy2 = (dy << 1);  // slope scaling factors to avoid floating
+		int dx2 = (dx << 1);  // point
+		int ix = x1 < x2 ? 1 : -1;  // increment direction
+		int iy = y1 < y2 ? 1 : -1;
+
+		if (dy <= dx) {
+			for (;;) {
+				if (x1 == x2)
+					break;
+				trail.add(new Trailpart(x1, y1));
+				x1 += ix;
+				d += dy2;
+				if (d > dx) {
+					y1 += iy;
+					d -= dx2;
+				}
+			}
+		} else {
+			for (;;) {
+				if (y1 == y2)
+					break;
+				trail.add(new Trailpart(x1, y1));
+				y1 += iy;
+				d += dx2;
+				if (d > dy) {
+					x1 += ix;
+					d -= dy2;
+				}
+			}
+		}
+		return trail.size != size;
+	}
+
+	private static class TrailList implements Iterable<Trailpart>
+	{
+		TrailNode first;
+		TrailNode last;
+		int size;
+
+		public void add(Trailpart t)
+		{
+			if (last == null) {
+				last = first = new TrailNode(t);
+			} else {
+				TrailNode n = new TrailNode(t);
+				last.next = n;
+				last = n;
+			}
+			size++;
+		}
+
+		@Override
+		public Iterator<Trailpart> iterator()
+		{
+			return new Iterator<Trailpart>() {
+				TrailNode node = first;
+				@Override
+				public boolean hasNext() {
+					return node != null;
+				}
+
+				@Override
+				public Trailpart next() {
+					Trailpart v = node.value;
+					node = node.next;
+					return v;
+				}
+			};
+		}
+	}
+
+	private static class TrailNode
+	{
+		TrailNode next;
+		Trailpart value;
+		TrailNode(Trailpart t) {
+			value = t;
+		}
+	}
+
+	private static class Trailpart {
+		int x, y;
+		long time;
+		Trailpart(int x, int y) {
+			this.x = x;
+			this.y = y;
+			this.time = nowtime;
+		}
+	}
+}

src/yugecin/opsudance/ReplayCursors.java

@@ -0,0 +1,111 @@
+/*
+ * opsu!dance - fork of opsu! with cursordance auto
+ * Copyright (C) 2018 yugecin
+ *
+ * opsu!dance is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * opsu!dance is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with opsu!dance.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package yugecin.opsudance;
+
+import org.lwjgl.BufferUtils;
+import org.lwjgl.opengl.*;
+import org.newdawn.slick.*;
+import org.newdawn.slick.opengl.Texture;
+import org.newdawn.slick.opengl.TextureImpl;
+
+import itdelatrisu.opsu.render.Rendertarget;
+
+import static itdelatrisu.opsu.GameImage.*;
+import static yugecin.opsudance.core.InstanceContainer.*;
+import static yugecin.opsudance.options.Options.*;
+
+import java.nio.IntBuffer;
+
+public class ReplayCursors
+{
+	public final ReplayPlayback[] playbacks;
+
+	private final Rendertarget fbo;
+
+	public ReplayCursors(int amount)
+	{
+		this.playbacks = new ReplayPlayback[amount];
+		this.fbo = Rendertarget.createRTTFramebuffer(width, height);
+	}
+
+	public void draw()
+	{
+		final Image img = CURSOR_TRAIL.getImage();
+		final Texture txt = img.getTexture();
+
+		final float trailw2 = img.getWidth() * OPTION_CURSOR_SIZE.val / 100f / 2f;
+		final float trailh2 = img.getHeight() * OPTION_CURSOR_SIZE.val / 100f / 2f;
+		float txtw = txt.getWidth();
+		float txth = txt.getHeight();
+
+		for (ReplayPlayback p : playbacks) {
+			if (!p.shouldDrawCursor()) {
+				continue;
+			}
+			// stuff copied from CurveRenderState and stuff, I don't know what I'm doing
+			int oldFb = GL11.glGetInteger(EXTFramebufferObject.GL_FRAMEBUFFER_BINDING_EXT);
+			int oldTex = GL11.glGetInteger(GL11.GL_TEXTURE_BINDING_2D);
+			IntBuffer oldViewport = BufferUtils.createIntBuffer(16);
+			GL11.glGetInteger(GL11.GL_VIEWPORT, oldViewport);
+			EXTFramebufferObject.glBindFramebufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT, fbo.getID());
+			GL11.glViewport(0, 0, fbo.width, fbo.height);
+			GL11.glClearColor(0f, 0f, 0f, 0f);
+			GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
+
+			txt.bind();
+			TextureImpl.unbind();
+			GL11.glBegin(GL11.GL_QUADS);
+			p.cursor.drawTrail(trailw2, trailh2, txtw, txth);
+			GL11.glEnd();
+
+			GL11.glBindTexture(GL11.GL_TEXTURE_2D, oldTex);
+			EXTFramebufferObject.glBindFramebufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT, oldFb);
+			GL11.glViewport(oldViewport.get(0), oldViewport.get(1), oldViewport.get(2), oldViewport.get(3));
+
+			GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE);
+			//GL11.glEnable(GL11.GL_TEXTURE_2D);
+			//GL11.glDisable(GL11.GL_TEXTURE_1D);
+			GL11.glBindTexture(GL11.GL_TEXTURE_2D, fbo.getTextureID());
+			GL11.glBegin(GL11.GL_QUADS);
+			GL11.glColor4f(1f, 1f, 1f, 1f);
+			GL11.glTexCoord2f(1f, 1f);
+			GL11.glVertex2i(fbo.width, 0);
+			GL11.glTexCoord2f(0f, 1f);
+			GL11.glVertex2i(0, 0);
+			GL11.glTexCoord2f(0f, 0f);
+			GL11.glVertex2i(0, fbo.height);
+			GL11.glTexCoord2f(1f, 0f);
+			GL11.glVertex2i(fbo.width, fbo.height);
+			GL11.glEnd();
+			GL14.glBlendFuncSeparate(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA, GL11.GL_ONE, GL11.GL_ONE_MINUS_SRC_ALPHA);
+		}
+
+		for (ReplayPlayback p : playbacks) {
+			if (!p.shouldDrawCursor()) {
+				continue;
+			}
+			p.cursor.drawCursor();
+		}
+	}
+
+	public void destroy()
+	{
+		this.fbo.destroyRTT();
+	}
+}

src/yugecin/opsudance/ReplayPlayback.java

@@ -0,0 +1,490 @@
+/*
+ * opsu!dance - fork of opsu! with cursordance auto
+ * Copyright (C) 2017 yugecin
+ *
+ * opsu!dance is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * opsu!dance is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with opsu!dance.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package yugecin.opsudance;
+
+import itdelatrisu.opsu.GameData;
+import itdelatrisu.opsu.replay.Replay;
+import itdelatrisu.opsu.replay.ReplayFrame;
+import itdelatrisu.opsu.ui.Fonts;
+import itdelatrisu.opsu.ui.animations.AnimationEquation;
+import org.newdawn.slick.Color;
+import org.newdawn.slick.Graphics;
+import org.newdawn.slick.Image;
+import yugecin.opsudance.core.Entrypoint;
+
+import java.io.*;
+import java.nio.ByteBuffer;
+import java.util.Iterator;
+import java.util.LinkedList;
+
+import static itdelatrisu.opsu.GameData.*;
+import static itdelatrisu.opsu.Utils.*;
+import static itdelatrisu.opsu.ui.animations.AnimationEquation.*;
+import static yugecin.opsudance.core.InstanceContainer.*;
+import static yugecin.opsudance.options.Options.*;
+
+public class ReplayPlayback
+{
+	private final HitData hitdata;
+	public final Replay replay;
+	public ReplayFrame currentFrame;
+	public ReplayFrame nextFrame;
+	private int frameIndex;
+	private Color color;
+	private final Color originalcolor;
+	public final ReplayCursor cursor;
+	private int keydelay[];
+	public final int PADDING = 3;
+	public final int sqsize;
+	public final int unitHeight;
+	public static int lineHeight;
+	private boolean hr;
+	private String player;
+	private String mods;
+	private int playerwidth;
+	private int modwidth;
+	private String currentAcc;
+	private int currentAccWidth;
+	private final int ACCMAXWIDTH;
+
+	private int c300, c100, c50, fakecmiss;
+
+	private Image hitImage;
+	private int hitImageTimer = 0;
+	private boolean knockedout;
+	private final LinkedList<MissIndicator> missIndicators;
+
+	private Image gradeImage;
+
+	private static final Color missedColor = new Color(0.4f, 0.4f, 0.4f, 1f);
+
+	public ReplayPlayback(Replay replay, HitData hitdata, Color color, ReplayCursor cursor) {
+		this.missIndicators = new LinkedList<>();
+		this.replay = replay;
+		this.hitdata = hitdata;
+		resetFrameIndex();
+		this.color = new Color(color);
+		this.originalcolor = color;
+		this.cursor = cursor;
+		keydelay = new int[4];
+		this.player = replay.playerName;
+		this.playerwidth = Fonts.SMALLBOLD.getWidth(this.player);
+		this.mods = "";
+		this.currentAcc = "100,00%";
+		this.currentAccWidth = Fonts.SMALLBOLD.getWidth(currentAcc);
+		this.ACCMAXWIDTH = currentAccWidth + 10;
+		this.unitHeight = (int) (Fonts.SMALLBOLD.getLineHeight() * 0.9f);
+		this.sqsize = unitHeight - PADDING;
+		lineHeight = this.unitHeight;
+		if ((replay.mods & 0x1) > 0) {
+			this.mods += "NF";
+		}
+		if ((replay.mods & 0x2) > 0) {
+			this.mods += "EZ";
+		}
+		if ((replay.mods & 0x8) > 0 && (replay.mods & 0x200) == 0) {
+			this.mods += "HD";
+		}
+		if ((replay.mods & 0x10) > 0) {
+			this.mods += "HR";
+			hr = true;
+		}
+		if ((replay.mods & 0x20) > 0) {
+			this.mods += "SD";
+		}
+		if ((replay.mods & 0x40) > 0) {
+			this.mods += "DT";
+		}
+		if ((replay.mods & 0x80) > 0) {
+			this.mods += "RL";
+		}
+		if ((replay.mods & 0x100) > 0) {
+			this.mods += "HT";
+		}
+		if ((replay.mods & 0x200) > 0) {
+			this.mods += "NC";
+		}
+		if ((replay.mods & 0x400) > 0) {
+			this.mods += "FL";
+		}
+		if ((replay.mods & 0x4000) > 0) {
+			this.mods += "PF";
+		}
+		if (this.mods.length() > 0) {
+			this.mods = " +" + this.mods;
+			this.modwidth = Fonts.SMALLBOLD.getWidth(this.mods);
+		}
+		updateGradeImage();
+	}
+
+	public void resetFrameIndex() {
+		frameIndex = 0;
+		currentFrame = replay.frames[frameIndex++];
+		nextFrame = replay.frames[frameIndex];
+	}
+
+	private void updateGradeImage() {
+		if (knockedout || !OPTION_RP_SHOW_GRADES.state) {
+			gradeImage = null;
+			return;
+		}
+
+		boolean silver = (replay.mods & 0x408) > 0 && (replay.mods & 0x200) == 0;
+		GameData.Grade grade = GameData.getGrade(c300, c100, c50, fakecmiss, silver);
+
+		if (grade == GameData.Grade.NULL) {
+			if ((replay.mods & 0x8) > 0 && (replay.mods & 0x200) == 0) {
+				grade = GameData.Grade.SSH;
+			} else {
+				grade = GameData.Grade.SS;
+			}
+		}
+		gradeImage = grade.getSmallImage().getScaledCopy(unitHeight, unitHeight);
+	}
+
+	private int HITIMAGETIMEREXPAND = 250;
+	private int HITIMAGETIMERFADESTART = 500;
+	private int HITIMAGETIMERFADEEND = 700;
+	private float HITIMAGETIMERFADEDELTA = HITIMAGETIMERFADEEND - HITIMAGETIMERFADESTART;
+	private int HITIMAGEDEADFADE = 4000;
+	private float SHRINKTIME = 500f;
+	private void showHitImage(int renderdelta, int xpos, float ypos) {
+		if (hitImage == null) {
+			return;
+		}
+
+		hitImageTimer += renderdelta;
+		if (!knockedout && hitImageTimer > HITIMAGETIMERFADEEND) {
+			hitImage = null;
+			return;
+		}
+
+		Color color = new Color(1f, 1f, 1f, 1f);
+		if (!knockedout && hitImageTimer > HITIMAGETIMERFADESTART) {
+			color.a = (HITIMAGETIMERFADEEND - hitImageTimer) / HITIMAGETIMERFADEDELTA;
+		}
+		if (knockedout) {
+			if (hitImageTimer > HITIMAGEDEADFADE) {
+				this.color.a = color.a = 0f;
+			} else {
+				this.color.a = color.a = 1f - AnimationEquation.IN_CIRC.calc((float) hitImageTimer / HITIMAGEDEADFADE);
+			}
+		}
+		float scale = 1f;
+		float offset = 0f;
+		if (hitImageTimer < HITIMAGETIMEREXPAND) {
+			scale = AnimationEquation.OUT_EXPO.calc((float) hitImageTimer / HITIMAGETIMEREXPAND);
+			offset = unitHeight / 2f * (1f - scale);
+		}
+		hitImage.draw(xpos, 2f + ypos + offset, scale, color);
+	}
+
+	public float getHeight() {
+		if (hitImageTimer < HITIMAGEDEADFADE) {
+			return unitHeight;
+		}
+		if (hitImageTimer >= HITIMAGEDEADFADE + SHRINKTIME) {
+			return 0f;
+		}
+		return unitHeight * (1f - AnimationEquation.OUT_QUART.calc((hitImageTimer - HITIMAGEDEADFADE) / SHRINKTIME));
+	}
+
+	public void render(int renderdelta, Graphics g, float ypos, int time)
+	{
+		while (nextFrame != null && nextFrame.getTime() < time) {
+			currentFrame = nextFrame;
+			processKeys();
+			frameIndex++;
+			if (frameIndex >= replay.frames.length) {
+				nextFrame = null;
+				continue;
+			}
+			nextFrame = replay.frames[frameIndex];
+		}
+		processKeys();
+		g.setColor(color);
+		if (!knockedout) {
+			for (int i = 0; i < 4; i++) {
+				if (keydelay[i] > 0) {
+					g.fillRect(sqsize * i, ypos + PADDING, sqsize, sqsize);
+				}
+				keydelay[i] -= renderdelta;
+			}
+
+			boolean hitschanged = false;
+			while (!hitdata.acc.isEmpty() && hitdata.acc.getFirst().time <= time) {
+				currentAcc = String.format("%.2f%%", hitdata.acc.removeFirst().acc).replace('.', ',');
+				currentAccWidth = Fonts.SMALLBOLD.getWidth(currentAcc);
+			}
+
+			while (!hitdata.time300.isEmpty() && hitdata.time300.getFirst() <= time) {
+				hitdata.time300.removeFirst();
+				c300++;
+				hitschanged = true;
+			}
+
+			while (!hitdata.time100.isEmpty() && hitdata.time100.getFirst() <= time) {
+				hitdata.time100.removeFirst();
+				hitImageTimer = 0;
+				hitImage = GameData.hitResults[GameData.HIT_100];
+				c100++;
+				hitschanged = true;
+			}
+
+			while (!hitdata.time50.isEmpty() && hitdata.time50.getFirst() <= time) {
+				hitdata.time50.removeFirst();
+				hitImageTimer = 0;
+				hitImage = GameData.hitResults[GameData.HIT_50];
+				c50++;
+				hitschanged = true;
+			}
+
+			while (!hitdata.timeCombobreaks.isEmpty() && hitdata.timeCombobreaks.getFirst() <= time) {
+				hitdata.timeCombobreaks.removeFirst();
+				hitImageTimer = 0;
+				hitImage = GameData.hitResults[GameData.HIT_MISS];
+				fakecmiss++;
+				hitschanged = true;
+				if (OPTION_RP_SHOW_MISSES.state) {
+					float posx = currentFrame.getScaledX();
+					float posy = currentFrame.getScaledY();
+					if (hr) {
+						posy = height - posy;
+					}
+					this.missIndicators.add(new MissIndicator(posx, posy));
+				}
+				if (OPTION_RP_KNOCKOUT.state) {
+					knockedout = true;
+					color = new Color(missedColor);
+				}
+			}
+
+			if (hitImage != null) {
+				final float h = hitImage.getHeight();
+				if (h == 0) {
+					hitImage = null;
+				} else {
+					hitImage = hitImage.getScaledCopy(unitHeight / h);
+				}
+			}
+
+			if (hitschanged) {
+				updateGradeImage();
+			}
+		}
+		int xpos = sqsize * (OPTION_RP_SHOW_MOUSECOLUMN.state ? 5 : 3);
+		if (OPTION_RP_SHOW_ACC.state) { 
+			Fonts.SMALLBOLD.drawString(xpos + ACCMAXWIDTH - currentAccWidth - 10, ypos, currentAcc, new Color(.4f, .4f, .4f, color.a));
+			xpos += ACCMAXWIDTH;
+		}
+		if (gradeImage != null) {
+			gradeImage.draw(xpos, ypos);
+			xpos += sqsize + 10;
+		}
+		Fonts.SMALLBOLD.drawString(xpos, ypos, this.player, color);
+		xpos += playerwidth;
+		if (!this.mods.isEmpty()) {
+			Fonts.SMALLBOLD.drawString(xpos, ypos, this.mods, new Color(1f, 1f, 1f, color.a));
+			xpos += modwidth;
+		}
+		xpos += 10;
+		if (OPTION_RP_SHOW_HITS.state) {
+			showHitImage(renderdelta, xpos, ypos);
+		}
+		if (OPTION_RP_SHOW_MISSES.state) { 
+			final Iterator<MissIndicator> iter = this.missIndicators.iterator();
+			while (iter.hasNext()) {
+				final MissIndicator mi = iter.next();
+				if (mi.timer >= HITIMAGEDEADFADE) {
+					iter.remove();
+					continue;
+				}
+				float progress = (float) mi.timer / HITIMAGEDEADFADE;
+				float failposy = mi.posy + 50f * OUT_QUART.calc(progress);
+				Color col = new Color(originalcolor);
+				col.a = 1f - IN_QUAD.calc(clamp(progress * 2f, 0f, 1f));
+				Fonts.SMALLBOLD.drawString(mi.posx - playerwidth / 2, failposy, player, col);
+				Color failimgcol = new Color(1f, 1f, 1f, col.a);
+				Image failimg = hitResults[HIT_MISS].getScaledCopy(unitHeight, unitHeight);
+				failimg.draw(mi.posx + playerwidth / 2 + 5, failposy + 2f, failimgcol);
+				mi.timer += renderdelta;
+			}
+		}
+		if (knockedout) {
+			return;
+		}
+		int y = currentFrame.getScaledY();
+		if (hr) {
+			y = height - y;
+		}
+		cursor.setCursorPosition(renderdelta, currentFrame.getScaledX(), y);
+	}
+
+	public boolean shouldDrawCursor()
+	{
+		return !knockedout;
+	}
+
+	private void processKeys() {
+		int keys = currentFrame.getKeys();
+		if ((keys & 5) == 5) {
+			keydelay[0] = OPTION_RP_KEYPRESS_DELAY.val;
+		}
+		if ((keys & 10) == 10) {
+			keydelay[1] = OPTION_RP_KEYPRESS_DELAY.val;
+		}
+		if ((keys ^ 5) == 4) {
+			keydelay[2] = OPTION_RP_KEYPRESS_DELAY.val;
+		}
+		if ((keys ^ 10) == 8) {
+			keydelay[3] = OPTION_RP_KEYPRESS_DELAY.val;
+		}
+	}
+	
+	private static class MissIndicator
+	{
+		private float posx, posy;
+		private int timer;
+		
+		private MissIndicator(float posx, float posy)
+		{
+			this.posx = posx;
+			this.posy = posy;
+			this.timer = 0;
+		}
+	}
+
+	public static class HitData
+	{
+		LinkedList<Integer> time300 = new LinkedList<>();
+		LinkedList<Integer> time100 = new LinkedList<>();
+		LinkedList<Integer> time50 = new LinkedList<>();
+		LinkedList<Integer> timeCombobreaks = new LinkedList<>();
+		LinkedList<AccData> acc = new LinkedList<>();
+		LinkedList<ComboData> combo = new LinkedList<>();
+
+		public HitData(File file) {
+			try (InputStream in = new FileInputStream(file)) {
+				int lasttime = -1;
+				int lastcombo = 0;
+				int last300 = 0;
+				int last100 = 0;
+				int last50 = 0;
+				while (true) {
+					byte[] time = new byte[4];
+					int rd = in.read(time);
+					if (rd <= 0) {
+						break;
+					}
+					if (rd != 4) {
+						throw new RuntimeException("expected 4 bytes, got " + rd);
+					}
+					byte[] _time = { time[3], time[2], time[1], time[0] };
+					lasttime = ByteBuffer.wrap(_time).getInt();
+					lasttime += 200;
+					int type = in.read();
+					if (type == -1) {
+						throw new RuntimeException();
+					}
+					if (in.read(time) != 4) {
+						throw new RuntimeException();
+					}
+					_time = new byte[] { time[3], time[2], time[1], time[0] };
+					switch (type) {
+					case 1:
+						int this100 = ByteBuffer.wrap(_time).getInt();
+						spread(time100, lasttime, this100 - last100);
+						last100 = this100;
+						break;
+					case 3:
+						int this300 = ByteBuffer.wrap(_time).getInt();
+						spread(time300, lasttime, this300 - last300);
+						last300 = this300;
+						break;
+					case 5:
+						int this50 = ByteBuffer.wrap(_time).getInt();
+						spread(time50, lasttime, this50 - last50);
+						last50 = this50;
+						break;
+					case 10:
+						acc.add(new AccData(lasttime, ByteBuffer.wrap(_time).getFloat()));
+						break;
+					case 12:
+						int c = ByteBuffer.wrap(_time).getInt();
+						combo.add(new ComboData(lasttime, c));
+						if (c < lastcombo) {
+							timeCombobreaks.add(lasttime);
+						}
+						lastcombo = c;
+						break;
+					default:
+						throw new RuntimeException("unexpected data");
+					}
+				}
+				if (lasttime == -1) {
+					throw new RuntimeException("nodata");
+				}
+				Entrypoint.sout(String.format(
+					"%s lastcombo %d lasttime %d",
+					file.getName(),
+					lastcombo,
+					lasttime
+				));
+			} catch (IOException e) {
+				throw new RuntimeException(e);
+			}
+		}
+
+		private void spread(LinkedList<Integer> list, int time, int d) {
+			if (list.isEmpty() || d <= 1) {
+				list.add(time);
+				return;
+			}
+
+			int dtime = time - list.getLast();
+			int inc = dtime / d;
+			int ttime = list.getLast();
+			for (int i = 0; i < d; i++) {
+				ttime += inc;
+				if (i == d - 1) {
+					ttime = time;
+				}
+				list.add(ttime);
+			}
+		}
+
+	}
+
+	public static class AccData {
+		public int time;
+		public float acc;
+		public AccData(int time, float acc) {
+			this.time = time;
+			this.acc = acc;
+		}
+	}
+
+	public static class ComboData {
+		public int time;
+		public int combo;
+		public ComboData(int time, int combo) {
+			this.time = time;
+			this.combo = combo;
+		}
+	}
+}

src/yugecin/opsudance/core/DisplayContainer.java

@@ -92,7 +92,7 @@ public class DisplayContainer implements ErrorDumpable, SkinChangedListener {
 
 	private long exitconfirmation;
 
-	public final Cursor cursor;
+	public Cursor cursor;
 	public boolean drawCursor;
 	
 	private final List<ResolutionChangedListener> resolutionChangedListeners;
@@ -106,8 +106,6 @@ public class DisplayContainer implements ErrorDumpable, SkinChangedListener {
 	public DisplayContainer()
 	{
 		this.resolutionChangedListeners = new ArrayList<>();
-		this.cursor = new Cursor();
-		drawCursor = true;
 
 		skinservice.addSkinChangedListener(this);
 
@@ -174,6 +172,7 @@ public class DisplayContainer implements ErrorDumpable, SkinChangedListener {
 
 	public void run() throws Exception {
 		while(!exitRequested && !(Display.isCloseRequested() && state.onCloseRequest()) || !confirmExit()) {
+			nowtime = System.currentTimeMillis();
 			delta = getDelta();
 
 			timeSinceLastRender += delta;
@@ -270,6 +269,8 @@ public class DisplayContainer implements ErrorDumpable, SkinChangedListener {
 		glVersion = GL11.glGetString(GL11.GL_VERSION);
 		glVendor = GL11.glGetString(GL11.GL_VENDOR);
 		GLHelper.hideNativeCursor();
+		this.cursor = new Cursor();
+		drawCursor = true;
 	}
 
 	// TODO: move this elsewhere

src/yugecin/opsudance/core/Entrypoint.java

@@ -35,6 +35,7 @@ public class Entrypoint {
 		try {
 			InstanceContainer.kickstart();
 		} catch (Exception e) {
+			e.printStackTrace();
 			JOptionPane.showMessageDialog(null, e.getMessage(), "Cannot start " + PROJECT_NAME, JOptionPane.ERROR_MESSAGE);
 			// TODO replace with errorhandler
 		}

src/yugecin/opsudance/core/InstanceContainer.java

@@ -82,6 +82,7 @@ public class InstanceContainer {
 	public static boolean isWidescreen;
 	public static int mouseX, mouseY;
 	public static int renderDelta;
+	public static long nowtime;
 
 	public static void kickstart() {
 		updater = new Updater();

src/yugecin/opsudance/options/OptionGroups.java

@@ -161,6 +161,15 @@ public class OptionGroups {
 			OPTION_DANCE_RGB_CURSOR_INC,
 			OPTION_DANCE_CURSOR_TRAIL_OVERRIDE,
 		}),
+		new OptionTab("REPLAYSTUFF", new Option[] {
+			OPTION_RP_KNOCKOUT,
+			OPTION_RP_SHOW_MISSES,
+			OPTION_RP_SHOW_GRADES,
+			OPTION_RP_SHOW_HITS,
+			OPTION_RP_SHOW_ACC,
+			OPTION_RP_SHOW_MOUSECOLUMN,
+			OPTION_RP_KEYPRESS_DELAY,
+		}),
 		new OptionTab("MISC", new Option[] {
 			OPTION_DANCE_HIDE_UI,
 			OPTION_DANCE_REMOVE_BG,

src/yugecin/opsudance/options/Options.java

@@ -373,7 +373,7 @@ public class Options {
 		}
 	};
 
-	public static final NumericOption OPTION_CURSOR_SIZE = new NumericOption("Size", "CursorSize", "Change the cursor scale.", 100, 50, 200) {
+	public static final NumericOption OPTION_CURSOR_SIZE = new NumericOption("Size", "CursorSize", "Change the cursor scale.", 100, 10, 200) {
 		@Override
 		public String getValueString () {
 			return String.format("%.2fx", val / 100f);
@@ -998,4 +998,19 @@ public class Options {
 	public static final ToggleOption OPTION_PIPPI_SLIDER_FOLLOW_EXPAND = new ToggleOption("Followcircle expand", "PippiFollowExpand", "Increase radius in followcircles", false);
 	public static final ToggleOption OPTION_PIPPI_PREVENT_WOBBLY_STREAMS = new ToggleOption("Prevent wobbly streams", "PippiPreventWobblyStreams", "Force linear mover while doing streams to prevent wobbly pippi", true);
 
+	public static final ToggleOption
+		OPTION_RP_KNOCKOUT = new ToggleOption("Knockout", "ReplayKnockout", "Remove replays on combobreaks.", true),
+		OPTION_RP_SHOW_MISSES = new ToggleOption("Show misses", "ReplayShowMiss", "Show falling miss indicators.", true),
+		OPTION_RP_SHOW_GRADES = new ToggleOption("Show grades", "ReplayShowGrades", "Show grades next to players.", true),
+		OPTION_RP_SHOW_HITS = new ToggleOption("Show hits", "ReplayShowHits", "Show miss, 50, 100 hits next to players.", true),
+		OPTION_RP_SHOW_MOUSECOLUMN = new ToggleOption("Mouse buttons column", "ReplayShowMouseColumn", "Preserve space for mouse button columns.", true),
+		OPTION_RP_SHOW_ACC = new ToggleOption("Show accuracy", "ReplayShowAcc", "Show accuracy next to players.", true);
+	
+	public static final NumericOption
+		OPTION_RP_KEYPRESS_DELAY = new NumericOption("Key indicator delay", "ReplayKeyDelay", "How long the key indicator should show after the key being released (ms).", 10, 1, 50) {
+			@Override
+			public String getValueString() {
+				return String.valueOf(val);
+			}
+		};
 }