1 files changed, 101 insertions, 0 deletions
diff --git a/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet174.java b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet174.java
new file mode 100644
index 0000000000..bd38e26088
--- /dev/null
+++ b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet174.java
@@ -0,0 +1,101 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *     Sebastian Davids
+ *******************************************************************************/
+package org.eclipse.swt.snippets;
+
+/*
+ * SWT OpenGL snippet: draw a square
+ * 
+ * This snippet requires the experimental org.eclipse.swt.opengl plugin, which
+ * is not included in swt by default.  For information on this plugin see
+ * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/opengl/opengl.html  
+ * 
+ * For a list of all SWT example snippets see
+ * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
+ */
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.*;
+import org.eclipse.swt.graphics.*;
+import org.eclipse.swt.layout.*;
+import org.eclipse.swt.opengl.*;
+import org.eclipse.swt.widgets.*;
+
+public class Snippet174 {
+
+public static void main(String[] args) {
+    Display display = new Display();
+    Shell shell = new Shell(display);
+    shell.setText("OpenGL SWT");
+    shell.setLayout(new FillLayout());
+    final Canvas canvas = new Canvas(shell, SWT.NONE);
+    canvas.addControlListener(new ControlAdapter() {
+        public void controlResized(ControlEvent e) {
+            resize(canvas);
+        }
+    });
+    final GLContext context = init(canvas);
+    shell.addDisposeListener(new DisposeListener() {
+        public void widgetDisposed(DisposeEvent e) {
+            context.dispose();
+        }
+    });
+    new Runnable() {
+        public void run() {
+            if (canvas.isDisposed()/* || canvas.getShell() == null*/) return;
+            render();
+            context.swapBuffers();
+            canvas.getDisplay().timerExec(100, this);
+        }
+    }.run();
+    shell.open();
+    while (!shell.isDisposed()) {
+        if (!display.readAndDispatch()) display.sleep();
+    }
+    display.dispose();
+}
+
+static GLContext init(Canvas canvas) {
+    GLContext context = new GLContext(canvas);
+    context.setCurrent();
+    resize(canvas);
+    GL.glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
+    GL.glColor3f(0.0f, 0.0f, 0.0f);
+    GL.glClearDepth(1.0f);
+    GL.glEnable(GL.GL_DEPTH_TEST);
+    GL.glHint(GL.GL_PERSPECTIVE_CORRECTION_HINT, GL.GL_NICEST);
+    return context;
+}
+
+static void render() {
+    GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
+    GL.glLoadIdentity();
+    GL.glTranslatef(0.0f, 0.0f, -6.0f);
+    GL.glBegin(GL.GL_QUADS);
+    GL.glVertex3f(-1.0f, 1.0f, 0.0f);
+    GL.glVertex3f(1.0f, 1.0f, 0.0f);
+    GL.glVertex3f(1.0f, -1.0f, 0.0f);
+    GL.glVertex3f(-1.0f, -1.0f, 0.0f);
+    GL.glEnd();
+}
+
+static void resize(Canvas canvas) {
+    Rectangle rect = canvas.getClientArea();
+    int width = rect.width;
+    int height = Math.max(rect.height, 1);
+    GL.glViewport(0, 0, width, height);
+    GL.glMatrixMode(GL.GL_PROJECTION);
+    GL.glLoadIdentity();
+    float aspect = (float) width / (float) height;
+    GLU.gluPerspective(45.0f, aspect, 0.5f, 400.0f);
+    GL.glMatrixMode(GL.GL_MODELVIEW);
+    GL.glLoadIdentity();
+}
+}