fixed FXAA crash on other browsers, added exit chat button, fixed arrow key mappings

src/main/java/net/lax1dude/eaglercraft/glemu/EffectPipelineFXAA.java

@@ -26,8 +26,10 @@ public class EffectPipelineFXAA {
 	private static BufferArrayGL renderQuadArray = null;
 	private static BufferGL renderQuadBuffer;
 
-	private static int width = -1;
-	private static int height = -1;
+	public static int displayWidth = -1;
+	public static int displayHeight = -1;
+	public static int width = -1;
+	public static int height = -1;
 
 	private static int[] originalViewport = new int[4];
 
@@ -142,6 +144,9 @@ public class EffectPipelineFXAA {
 	}
 
 	public static void beginPipelineRender() {
+		if(width == -1 || displayWidth == -1 || height == -1 || displayHeight == -1) {
+			return;
+		}
 		int mode = Minecraft.getMinecraft().gameSettings.antialiasMode;
 		if(mode == 0) newState = 0;
 		if(mode == 1) newState = Minecraft.getMinecraft().gameSettings.fancyGraphics ? 1 : 0;
@@ -153,14 +158,12 @@ public class EffectPipelineFXAA {
 			if(state == 0) {
 				destroy();
 			}
-			width = -1;
-			height = -1;
 		}
 		if(state == 0) return;
-		_wglGetParameter(_wGL_VIEWPORT, 4, originalViewport);
-		if (width != originalViewport[2] || height != originalViewport[3]) {
-			width = originalViewport[2];
-			height = originalViewport[3];
+		//_wglGetParameter(_wGL_VIEWPORT, 4, originalViewport);
+		if (displayWidth != width || displayHeight != height) {
+			width = displayWidth;
+			height = displayHeight;
 			if(state == 1) {
 				if(isUsingFXAA == false || fxaaProgram == null) {
 					initFXAA();
@@ -190,6 +193,9 @@ public class EffectPipelineFXAA {
 	}
 
 	public static void endPipelineRender() {
+		if(width == -1 || displayWidth == -1 || height == -1 || displayHeight == -1) {
+			return;
+		}
 		if(state == 0) return;
 		_wglBindFramebuffer(_wGL_FRAMEBUFFER, null);
 		_wglClear(_wGL_COLOR_BUFFER_BIT | _wGL_DEPTH_BUFFER_BIT);

src/main/java/net/minecraft/src/EntityRenderer.java

@@ -919,6 +919,8 @@ public class EntityRenderer {
 			}
 
 			EaglerAdapter.glViewport(0, 0, this.mc.displayWidth, this.mc.displayHeight);
+			EffectPipelineFXAA.displayWidth = this.mc.displayWidth;
+			EffectPipelineFXAA.displayHeight = this.mc.displayHeight;
 			EffectPipelineFXAA.beginPipelineRender();
 			this.mc.mcProfiler.endStartSection("clear");
 			EaglerAdapter.glClear(EaglerAdapter.GL_COLOR_BUFFER_BIT | EaglerAdapter.GL_DEPTH_BUFFER_BIT);

src/main/java/net/minecraft/src/GuiChat.java

@@ -43,6 +43,7 @@ public class GuiChat extends GuiScreen {
 	 */
 	public void initGui() {
 		EaglerAdapter.enableRepeatEvents(true);
+		this.buttonList.add(new GuiButton(69, this.width - 100, 3, 97, 20, "Exit Chat"));
 		this.sentHistoryCursor = this.mc.ingameGUI.getChatGUI().getSentMessages().size();
 		this.inputField = new GuiTextField(this.fontRenderer, 4, this.height - 12, this.width - 4, 12);
 		this.inputField.setMaxStringLength(100);
@@ -51,6 +52,12 @@ public class GuiChat extends GuiScreen {
 		this.inputField.setText(this.defaultInputFieldText);
 		this.inputField.setCanLoseFocus(false);
 	}
+	
+	protected void actionPerformed(GuiButton par1GuiButton) {
+		if (par1GuiButton.id == 69) {
+			this.mc.displayGuiScreen(null);
+		}
+	}
 
 	/**
 	 * Called when the screen is unloaded. Used to disable keyboard repeat events

src/main/java/net/minecraft/src/MouseHelper.java

@@ -20,6 +20,10 @@ public class MouseHelper {
 	 * Grabs the mouse cursor it doesn't move and isn't seen.
 	 */
 	public void grabMouseCursor() {
+		int var1 = Minecraft.getMinecraft().displayWidth;
+		int var2 = Minecraft.getMinecraft().displayHeight;
+		
+		EaglerAdapter.mouseSetCursorPosition(var1 / 2, var2 / 2);
 		EaglerAdapter.mouseSetGrabbed(true);
 		this.deltaX = 0;
 		this.deltaY = 0;