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package org.lwjgl.test.opengles;
import org.lwjgl.BufferUtils;
import org.lwjgl.LWJGLException;
import org.lwjgl.input.Keyboard;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengles.PixelFormat;
import org.lwjgl.opengles.PowerManagementEventException;
import org.lwjgl.util.vector.Vector2f;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import static org.lwjgl.opengles.GLES20.*;
import static org.lwjgl.test.opengles.util.GLMatrix.*;
/**
* Tests switching between windowed and fullscreen
*
* @author Brian Matzon <brian@matzon.dk>
* @version $Revision: 3172 $
* $Id: FullScreenWindowedTest.java 3172 2008-12-28 19:30:43Z elias_naur $
*/
public class FullScreenWindowedTest {
/** Intended deiplay mode */
private DisplayMode mode;
/** our quad moving around */
private Vector2f quadPosition;
/** our quadVelocity */
private Vector2f quadVelocity;
/** angle of quad */
private float angle;
/** degrees to rotate per frame */
private float angleRotation = 1.0f;
/** Max speed of all changable attributes */
private static final float MAX_SPEED = 20.0f;
private static int buffer_id;
private static int indices_buffer_id;
private QuadRenderer renderer;
/** Creates a FullScreenWindowedTest */
public FullScreenWindowedTest() {
}
/** Executes the test */
public void execute() {
initialize();
mainLoop();
cleanup();
}
private void switchMode() throws LWJGLException {
mode = findDisplayMode(1024, 600, Display.getDisplayMode().getBitsPerPixel());
try {
Display.setDisplayModeAndFullscreen(mode);
} catch (PowerManagementEventException e) {
e.printStackTrace();
}
}
/** Initializes the test */
private void initialize() {
try {
//find displaymode
switchMode();
quadPosition = new Vector2f(100f, 100f);
quadVelocity = new Vector2f(1.0f, 1.0f);
reinit();
} catch (Exception e) {
e.printStackTrace();
}
}
private void reinit() throws LWJGLException {
Display.create(new PixelFormat());
glInit();
renderer = new QuadRenderer();
}
/** Runs the main loop of the "test" */
private void mainLoop() {
while ( !Keyboard.isKeyDown(Keyboard.KEY_ESCAPE) && !Display.isCloseRequested() ) {
if ( Display.isVisible() ) {
// check keyboard input
processKeyboard();
// do "game" logic, and render it
logic();
render();
} else {
// no need to render/paint if nothing has changed (ie. window
// dragged over)
if ( Display.isDirty() ) {
render();
}
// don't waste cpu time, sleep more
try {
Thread.sleep(100);
} catch (InterruptedException inte) {
}
}
// Update window
try {
Display.update();
Display.sync(60);
} catch (PowerManagementEventException e) {
e.printStackTrace();
}
}
}
/** Performs the logic */
private void logic() {
angle += angleRotation;
if ( angle > 90.0f ) {
angle = 0.0f;
}
quadPosition.x += quadVelocity.x;
quadPosition.y += quadVelocity.y;
//check colision with vertical border border
if ( quadPosition.x + 50 >= mode.getWidth() || quadPosition.x - 50 <= 0 ) {
quadVelocity.x *= -1;
}
//check collision with horizontal border
if ( quadPosition.y + 50 >= mode.getHeight() || quadPosition.y - 50 <= 0 ) {
quadVelocity.y *= -1;
}
}
private void render() {
//clear background
glClear(GL_COLOR_BUFFER_BIT);
// draw white quad
glPushMatrix();
{
glTranslatef(quadPosition.x, quadPosition.y, 0);
glRotatef(angle, 0.0f, 0.0f, 1.0f);
renderer.setMVPUniform();
glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_INT, 0);
}
glPopMatrix();
}
/** Processes keyboard input */
private void processKeyboard() {
//check for fullscreen key
if ( Keyboard.isKeyDown(Keyboard.KEY_F) ) {
try {
cleanup();
switchMode();
reinit();
} catch (Exception e) {
e.printStackTrace();
}
}
//check for window key
if ( Keyboard.isKeyDown(Keyboard.KEY_W) ) {
try {
cleanup();
mode = new DisplayMode(800, 480);
Display.setDisplayModeAndFullscreen(mode);
reinit();
} catch (Exception e) {
e.printStackTrace();
}
}
//check for speed changes
if ( Keyboard.isKeyDown(Keyboard.KEY_UP) ) {
quadVelocity.y += 0.1f;
}
if ( Keyboard.isKeyDown(Keyboard.KEY_DOWN) ) {
quadVelocity.y -= 0.1f;
}
if ( Keyboard.isKeyDown(Keyboard.KEY_RIGHT) ) {
quadVelocity.x += 0.1f;
}
if ( Keyboard.isKeyDown(Keyboard.KEY_LEFT) ) {
quadVelocity.x -= 0.1f;
}
if ( Keyboard.isKeyDown(Keyboard.KEY_ADD) ) {
angleRotation += 0.1f;
}
if ( Keyboard.isKeyDown(Keyboard.KEY_SUBTRACT) ) {
angleRotation -= 0.1f;
}
//throttle
if ( quadVelocity.x < -MAX_SPEED ) {
quadVelocity.x = -MAX_SPEED;
}
if ( quadVelocity.x > MAX_SPEED ) {
quadVelocity.x = MAX_SPEED;
}
if ( quadVelocity.y < -MAX_SPEED ) {
quadVelocity.y = -MAX_SPEED;
}
if ( quadVelocity.y > MAX_SPEED ) {
quadVelocity.y = MAX_SPEED;
}
if ( angleRotation < 0.0f ) {
angleRotation = 0.0f;
}
if ( angleRotation > MAX_SPEED ) {
angleRotation = MAX_SPEED;
}
}
/** Cleans up the test */
private void cleanup() {
renderer.cleanup();
IntBuffer int_buffer = BufferUtils.createIntBuffer(2);
int_buffer.put(0, buffer_id);
int_buffer.put(1, indices_buffer_id);
glDeleteBuffers(int_buffer);
Display.destroy();
}
/**
* Retrieves a displaymode, if one such is available
*
* @param width Required width
* @param height Required height
* @param bpp Minimum required bits per pixel
*
* @return
*/
private static DisplayMode findDisplayMode(int width, int height, int bpp) throws LWJGLException {
DisplayMode[] modes = Display.getAvailableDisplayModes();
for ( int i = 0; i < modes.length; i++ ) {
if ( modes[i].getWidth() == width && modes[i].getHeight() == height && modes[i].getBitsPerPixel() >= bpp && modes[i].getFrequency() <= 60 ) {
return modes[i];
}
}
return Display.getDesktopDisplayMode();
}
/** Initializes OGL */
private void glInit() {
// Go into orthographic projection mode.
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, mode.getWidth(), 0, mode.getHeight(), -1.0f, 1.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glViewport(0, 0, mode.getWidth(), mode.getHeight());
//set clear color to black
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
//sync frame (only works on windows)
Display.setVSyncEnabled(true);
final IntBuffer int_buffer = BufferUtils.createIntBuffer(2);
glGenBuffers(int_buffer);
buffer_id = int_buffer.get(0);
indices_buffer_id = int_buffer.get(1);
glBindBuffer(GL_ARRAY_BUFFER, buffer_id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indices_buffer_id);
final FloatBuffer vertices = BufferUtils.createFloatBuffer(2 * 4);
vertices
.put(-50).put(-50)
.put(50).put(-50)
.put(-50).put(50)
.put(50).put(50);
vertices.rewind();
final IntBuffer indices = BufferUtils.createIntBuffer(4);
indices.put(0).put(1).put(2).put(3);
indices.rewind();
glBufferData(GL_ARRAY_BUFFER, vertices, GL_STATIC_DRAW);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices, GL_STATIC_DRAW);
}
/** Test entry point */
public static void main(String[] args) {
System.out.println("Change between fullscreen and windowed mode, by pressing F and W respectively");
System.out.println("Move quad using arrowkeys, and change rotation using +/-");
FullScreenWindowedTest fswTest = new FullScreenWindowedTest();
fswTest.execute();
System.exit(0);
}
}