Removed unused code, Created OpenGL objects

Added "GlObject", a way to easily interface with OpenGL objects in memory.
Made a "DisplayList" object for OpenGL display lists.
Used the new DisplayList in WidgetHandler

Author: ZeroMemes

src/main/java/me/zero/client/api/gui/widget/WidgetHandler.java

@@ -19,6 +19,8 @@
 import me.zero.client.api.gui.widget.data.WidgetPos;
 import me.zero.client.api.util.math.Vec2;
 import me.zero.client.api.util.render.RenderUtils;
+import me.zero.client.api.util.render.gl.glenum.GlListMode;
+import me.zero.client.api.util.render.gl.object.DisplayList;
 import net.minecraft.client.gui.FontRenderer;
 import net.minecraft.client.gui.ScaledResolution;
 
@@ -47,7 +49,7 @@ public final class WidgetHandler {
     /**
      * The Open GL instruction list used when rendering
      */
-    private final int list;
+    private final DisplayList list = new DisplayList(1);
 
     private float padding, spacing, position;
 
@@ -58,7 +60,7 @@ public final class WidgetHandler {
     private boolean outlines;
 
     public WidgetHandler() {
-        list = glGenLists(1);
+        list.gen();
     }
 
     /**
@@ -98,7 +100,7 @@ public final void draw(FontRenderer font, ScaledResolution sr) {
             // We write to a list so that the height can
             // be updated and the required vertical adjustment
             // can be made before we actually render the widgets
-            glNewList(list, GL_COMPILE);
+            list.start(GlListMode.COMPILE);
             widgets.forEach(widget -> {
                 float mP = (widget.getAlignment().getValue() + 0.5F != 0.0F) ? 1.0F : 0.0F;
                 float xP = pos.getPadding().getX() * padding * mP;
@@ -115,13 +117,13 @@ public final void draw(FontRenderer font, ScaledResolution sr) {
                 glTranslatef(0.0F, widget.getHeight() + spacing, 0.0F);
                 position += widget.getHeight();
             });
-            glEndList();
+            list.stop();
 
             position += spacing * (widgets.size() - 1);
             glTranslatef(0.0F, position * pos.getOffset(), 0.0F);
 
             // Render all of the widgets
-            glCallList(list);
+            list.call();
 
             glPopMatrix();
         });

src/main/java/me/zero/client/api/util/Messages.java

@@ -17,13 +17,15 @@
 package me.zero.client.api.util;
 
 import me.zero.client.api.util.logger.Level;
+import me.zero.client.api.util.logger.ILogger;
 
 /**
  * Storage for all Messages used by the Logger's logf method
  * as well as some generic messages sent to the client from
  * the api.
  *
- * @see me.zero.client.api.util.logger.ILogger#logf(Level, String, Object...)
+ * @see ILogger#log(Level, String)
+ * @see ILogger#logf(Level, String, Object...)
  *
  * @author Brady
  * @since 1/21/2017 12:00 PM
@@ -36,9 +38,4 @@ public interface Messages {
     String PLUGIN_CANT_CREATE_MODULE           = "Unable to create Module, %s";
     String PLUGIN_CANT_LOAD_CLASS              = "Unable to load Class, %s";
     String PLUGIN_CANT_CREATE_INPUTSTREAM      = "Unable to create jar InputStream, %s";
-
-    String MODULE_INSTANTIATION                = "Unable to instantiate Module, %s";
-
-    String COMMAND_MISSING_ARGS                = "Missing required argument: %s, with type %s";
-    String COMMAND_INVALID                     = "Invalid Command";
 }

src/main/java/me/zero/client/api/util/render/gl/GlObject.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2017 ZeroMemes
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package me.zero.client.api.util.render.gl;
+
+/**
+ * Representation of an Object in OpenGL
+ *
+ * @author Brady
+ * @since 7/22/2017 4:18 PM
+ */
+public abstract class GlObject {
+
+    public static final int UNABLE_TO_GENERATE = 0;
+    public static final int NOT_GENERATED = -1;
+
+    private int id = NOT_GENERATED;
+
+    /**
+     * Generates this OpenGL Object. Return value reflects
+     * whether or not the operation was a success or not.
+     *
+     * @return Whether or not the operation was a success.
+     *         May return 'false' if
+     */
+    public final boolean gen() {
+        return !isGen() && (id = nativeGen()) != UNABLE_TO_GENERATE;
+    }
+
+    /**
+     * Called by GlObject#gen() to generate this object.
+     *
+     * @return The ID of the (possibly) created object
+     */
+    protected abstract int nativeGen();
+
+    /**
+     * Deletes this object from memory.
+     *
+     * @return Whether or not the operation was a success
+     */
+    public final boolean delete() {
+        if (!isGen())
+            return false;
+
+        id = NOT_GENERATED;
+        nativeDelete();
+        return true;
+    }
+
+    /**
+     * Called by GlObject#delete() to delete this object from memory.
+     */
+    protected abstract void nativeDelete();
+
+    /**
+     * @return The ID of this object
+     */
+    public final int id() {
+        return this.id;
+    }
+
+    /**
+     * @return Whether or not the object has been successfully generated
+     */
+    public final boolean isGen() {
+        return id > 0;
+    }
+}

src/main/java/me/zero/client/api/util/render/gl/glenum/GlListMode.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2017 ZeroMemes
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package me.zero.client.api.util.render.gl.glenum;
+
+import static org.lwjgl.opengl.GL11.*;
+
+/**
+ * @author Brady
+ * @since 7/22/2017 4:32 PM
+ */
+public enum GlListMode {
+
+    /**
+     * Commands are merely compiled.
+     */
+    COMPILE(GL_COMPILE),
+
+    /**
+     * Commands are executed as they are compiled into the display list.
+     */
+    COMPILE_AND_EXECUTE(GL_COMPILE_AND_EXECUTE);
+
+    public final int id;
+
+    GlListMode(int id) {
+        this.id = id;
+    }
+}

src/main/java/me/zero/client/api/util/render/gl/object/DisplayList.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2017 ZeroMemes
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package me.zero.client.api.util.render.gl.object;
+
+import me.zero.client.api.util.render.gl.GlObject;
+import me.zero.client.api.util.render.gl.glenum.GlListMode;
+
+import static org.lwjgl.opengl.GL11.*;
+
+/**
+ * @author Brady
+ * @since 7/22/2017 4:27 PM
+ */
+public final class DisplayList extends GlObject {
+
+    private final int range;
+
+    public DisplayList(int range) {
+        this.range = range;
+    }
+
+    @Override
+    protected final int nativeGen() {
+        return glGenLists(range);
+    }
+
+    @Override
+    protected final void nativeDelete() {
+        glDeleteLists(id(), range);
+    }
+
+    public final void start(GlListMode mode) {
+        glNewList(id(), mode.id);
+    }
+
+    public final void stop() {
+        glEndList();
+    }
+
+    public final void call() {
+        glCallList(id());
+    }
+}