Fixed a bug

src/main/java/org/warp/picalculator/device/Keyboard.java

@@ -604,7 +604,8 @@ public class Keyboard {
 						refresh = true;
 						break;
 					case ZOOM_MODE:
-						StaticVars.windowZoom = ((StaticVars.windowZoom - 0.5f) % 2f) + 1f;
+						StaticVars.windowZoom = ((StaticVars.windowZoom - 1) % 2) + 2;
+//						StaticVars.windowZoom = ((StaticVars.windowZoom - 0.5f) % 2f) + 1f;
 						refresh = true;
 					case HISTORY_BACK:
 						DisplayManager.INSTANCE.goBack();

src/main/java/org/warp/picalculator/gui/graphicengine/gpu/GPUEngine.java

@@ -2,6 +2,7 @@ package org.warp.picalculator.gui.graphicengine.gpu;
 
 import java.io.IOException;
 import java.util.HashMap;
+import java.util.LinkedList;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.concurrent.CopyOnWriteArrayList;
@@ -14,7 +15,9 @@ import org.warp.picalculator.gui.graphicengine.GraphicEngine;
 import org.warp.picalculator.gui.graphicengine.RenderingLoop;
 import org.warp.picalculator.gui.graphicengine.Skin;
 
+import com.jogamp.opengl.GL;
 import com.jogamp.opengl.GLProfile;
+import com.jogamp.opengl.util.texture.Texture;
 
 public class GPUEngine implements GraphicEngine {
 
@@ -27,6 +30,8 @@ public class GPUEngine implements GraphicEngine {
 	int[] size = new int[] { StaticVars.screenSize[0], StaticVars.screenSize[1] };
 	private final CopyOnWriteArrayList<BinaryFont> registeredFonts = new CopyOnWriteArrayList<BinaryFont>();
 	private Semaphore exitSemaphore = new Semaphore(0);
+	protected LinkedList<Texture> registeredTextures;
+	protected LinkedList<Texture> unregisteredTextures;
 
 	@Override
 	public int[] getSize() {
@@ -68,6 +73,8 @@ public class GPUEngine implements GraphicEngine {
 	@Override
 	public void create(Runnable onInitialized) {
 		created = true;
+		registeredTextures = new LinkedList<>();
+		unregisteredTextures = new LinkedList<>();
 		r = new GPURenderer();
 		wnd = new NEWTWindow(this);
 		wnd.create();
@@ -193,4 +200,8 @@ public class GPUEngine implements GraphicEngine {
 		return registeredFonts;
 	}
 
+	public void registerTexture(Texture t) {
+		unregisteredTextures.addLast(t);
+	}
+
 }

src/main/java/org/warp/picalculator/gui/graphicengine/gpu/GPUSkin.java

@@ -45,7 +45,7 @@ public class GPUSkin implements Skin {
 			t = GPURenderer.importTexture(i.f, i.deleteOnExit);
 			w = i.w;
 			h = i.h;
-			t.setTexParameteri(gl, GL.GL_TEXTURE_MAG_FILTER, GL.GL_NEAREST);
+			((GPUEngine)d).registerTexture(t);
 			initialized = true;
 		} catch (GLException | IOException e) {
 			e.printStackTrace();

src/main/java/org/warp/picalculator/gui/graphicengine/gpu/NEWTWindow.java

@@ -53,6 +53,7 @@ import com.jogamp.opengl.fixedfunc.GLLightingFunc;
 import com.jogamp.opengl.fixedfunc.GLMatrixFunc;
 import com.jogamp.opengl.fixedfunc.GLPointerFunc;
 import com.jogamp.opengl.util.Animator;
+import com.jogamp.opengl.util.texture.Texture;
 
 /**
  *
@@ -89,8 +90,10 @@ class NEWTWindow implements GLEventListener {
 		final GLCapabilities caps = new GLCapabilities(GLProfile.get(GLProfile.GL2ES1));
 		System.out.println("Loaded OpenGL");
 		// We may at this point tweak the caps and request a translucent drawable
+		caps.setHardwareAccelerated(true);
 		caps.setBackgroundOpaque(true); //transparency window
-		caps.setSampleBuffers(false);
+//		caps.setSampleBuffers(true);
+//		caps.setNumSamples(4);
 		final GLWindow glWindow = GLWindow.create(caps);
 		window = glWindow;
 
@@ -301,6 +304,9 @@ class NEWTWindow implements GLEventListener {
 		gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
 		gl.glShadeModel(GLLightingFunc.GL_FLAT);
 
+		//Multisampling
+		//gl.glEnable(GL.GL_MULTISAMPLE);
+
 		if (onInitialized != null) {
 			onInitialized.run();
 			onInitialized = null;
@@ -332,7 +338,15 @@ class NEWTWindow implements GLEventListener {
 	private void onZoomChanged(GL2ES1 gl, boolean sizeChanged) {
 		float precWindowZoom = windowZoom;
 		windowZoom = StaticVars.getCurrentZoomValue();
-		System.out.println("sizechange" + windowZoom);
+
+		if (((precWindowZoom % ((int)precWindowZoom)) != 0f) != ((windowZoom % ((int)windowZoom)) != 0f)) {
+			boolean linear = (windowZoom % ((int)windowZoom)) != 0f;
+
+			for(Texture t : disp.registeredTextures) {
+				t.setTexParameteri(gl, GL.GL_TEXTURE_MAG_FILTER, linear ? GL.GL_LINEAR : GL.GL_NEAREST);
+				t.setTexParameteri(gl, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR);
+			}
+		}
 		
 		final int width = realWindowSize[0];
 		final int height = realWindowSize[1];
@@ -361,6 +375,17 @@ class NEWTWindow implements GLEventListener {
 			onZoomChanged(gl, false);
 		}
 
+		Boolean linear = null;
+		while(!disp.unregisteredTextures.isEmpty()) {
+			if (linear == null) {
+				linear = (windowZoom % ((int)windowZoom)) != 0f;
+			}
+			Texture t = disp.unregisteredTextures.pop();
+			t.setTexParameteri(gl, GL.GL_TEXTURE_MAG_FILTER, GL.GL_NEAREST);
+			t.setTexParameteri(gl, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR);
+			disp.registeredTextures.addLast(t);
+		}
+		
 		gl.glEnableClientState(GLPointerFunc.GL_COLOR_ARRAY);
 		gl.glEnableClientState(GLPointerFunc.GL_VERTEX_ARRAY);
 		gl.glEnableClientState(GLPointerFunc.GL_TEXTURE_COORD_ARRAY);

src/main/java/org/warp/picalculator/gui/screens/MathInputScreen.java

@@ -151,6 +151,7 @@ public class MathInputScreen extends Screen {
 		} else {
 			skinN = 21;
 		}
+		DisplayManager.INSTANCE.guiSkin.use(DisplayManager.INSTANCE.engine);
 		renderer.glFillRect(2 + 18 * pos + 2 * spacersNumb, 2, 16, 16, 16 * skinN, 16 * 0, 16, 16);
 	}