This code works on device and on simulator. Let me know if it works:
import java.nio.*;
import javax.microedition.khronos.egl.*;
import javax.microedition.khronos.opengles.*;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.system.*;
import net.rim.device.api.opengles.*;
/**
* Rendering a multi color 2-D triangle.
*/
public class RIM2DTri extends FullScreen implements Runnable
{
private EGL11 _egl;
private EGLDisplay _eglDisplay;
private EGLConfig _eglConfig;
private EGLSurface _eglSurface;
private EGLContext _eglContext;
private GL10 _gl;
private Bitmap _offscreenBitmap;
private Graphics _offscreenGraphics;
private FloatBuffer _vertexArray;
private FloatBuffer _colorArray;
private boolean _running;
private boolean _paused;
public RIM2DTri()
{
super(FullScreen.DEFAULT_MENU | FullScreen.DEFAULT_CLOSE);
}
private void initialize()
{
// Get EGL interface
_egl = (EGL11)EGLContext.getEGL();
// Get the EGL display
_eglDisplay = _egl.eglGetDisplay(EGL11.EGL_DEFAULT_DISPLAY);
// Initialize the display for EGL, null since we don't really need the version
_egl.eglInitialize(_eglDisplay, null);
// Choose an EGL config
EGLConfig[] configs = new EGLConfig[1];
int[] numConfigs = new int[1];
int[] attrs =
{
EGL11.EGL_RED_SIZE, 5,
EGL11.EGL_GREEN_SIZE, 6,
EGL11.EGL_BLUE_SIZE, 5,
EGL11.EGL_NONE
};
_egl.eglChooseConfig(_eglDisplay, attrs, configs, 1, numConfigs);
_eglConfig = configs[0];
// Create an EGL window surface
_eglSurface = _egl.eglCreateWindowSurface(_eglDisplay, _eglConfig, this, null);
// Create an EGL context
createEGLContext();
// Specify vertices and colors for a triangle
float[] vertices =
{
-0.5f, -0.5f, 0.0f,
0.0f, 0.5f, 0.0f,
0.5f, -0.5f, 0.0f
};
float[] colors =
{
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 1.0f,
0.0f, 0.0f, 1.0f, 1.0f
};
_vertexArray = ByteBuffer.allocateDirect(3 * 3 * 4).asFloatBuffer();
_vertexArray.put(vertices);
_vertexArray.rewind();
_colorArray = ByteBuffer.allocateDirect(4 * 3 * 4).asFloatBuffer();
_colorArray.put(colors);
_colorArray.rewind();
}
private void createEGLContext()
{
// Create an EGL context
_eglContext = _egl.eglCreateContext(_eglDisplay, _eglConfig, EGL10.EGL_NO_CONTEXT, null);
// Get the GL interface for our new context
_gl = (GL10)_eglContext.getGL();
// Make our new context current
_egl.eglMakeCurrent(_eglDisplay, _eglSurface, _eglSurface, _eglContext);
}
private void destroyEGL()
{
_egl.eglMakeCurrent(_eglDisplay, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_CONTEXT);
_egl.eglDestroyContext(_eglDisplay, _eglContext);
_egl.eglDestroySurface(_eglDisplay, _eglSurface);
}
private void handleContextLost()
{
// Destroy our EGL context
_egl.eglMakeCurrent(_eglDisplay, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_CONTEXT);
_egl.eglDestroyContext(_eglDisplay, _eglContext);
_eglContext = EGL10.EGL_NO_CONTEXT;
// Re-create our EGL context
createEGLContext();
}
/**
* Main render loop.
*/
public void run()
{
initialize();
while (_running)
{
// Idle If we are in the background
if (_paused)
{
synchronized (this)
{
try
{
wait();
}
catch (InterruptedException x) { }
}
}
updateBackBuffer();
renderFrame();
// Throttle cpu usage
try
{
Thread.sleep(20);
}
catch (InterruptedException x) { }
}
destroyEGL();
}
private void renderFrame()
{
// Make our context and surface current and check for EGL_CONTEXT_LOST
if (!_egl.eglMakeCurrent(_eglDisplay, _eglSurface, _eglSurface, _eglContext))
{
if (_egl.eglGetError() == EGL11.EGL_CONTEXT_LOST)
{
handleContextLost();
}
}
// Signal that we are about to begin OpenGL rendering
_egl.eglWaitNative(EGL10.EGL_CORE_NATIVE_ENGINE, _offscreenGraphics);
render(_gl);
// Signal that OpenGL ES rendering is complete
_egl.eglWaitGL();
// Swap the window surface to the display
_egl.eglSwapBuffers(_eglDisplay, _eglSurface);
}
private void render(GL10 gl)
{
// Set our GL viewport
gl.glViewport(0, 0, getWidth(), getHeight());
// Clear the surface
gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
// Set our projection matrix
gl.glMatrixMode(GL10.GL_PROJECTION);
gl.glLoadIdentity();
GLUtils.gluPerspective(gl, 45.0f, (float)getWidth()/(float)getHeight(), 0.15f, 10.0f);
// Draw our triangle
gl.glMatrixMode(GL10.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glTranslatef(0.0f, 0.0f, -3.0f);
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
gl.glVertexPointer(3, GL10.GL_FLOAT, 0, _vertexArray);
gl.glColorPointer(4, GL10.GL_FLOAT, 0, _colorArray);
gl.glDrawArrays(GL10.GL_TRIANGLES, 0, 3);
}
/**
* Called by the UI system to paint the screen.
*/
protected void paint(Graphics g)
{
if (_offscreenBitmap != null)
{
g.drawBitmap(0, 0, _offscreenBitmap.getWidth(), _offscreenBitmap.getHeight(), _offscreenBitmap, 0, 0);
}
}
/**
* Called when the visibility of our screen changes.
*
* @param visible true if our screen is being made visible,
* false if it's being hidden
*/
protected void onVisibilityChange(boolean visible)
{
if (visible)
{
resume();
}
else
{
pause();
}
}
/**
* Called when the screen is closing.
*/
public void close()
{
_running = false;
synchronized (this) { notifyAll(); }
super.close();
}
/**
* Keeps the back buffer in sync with the screen size.
*/
private void updateBackBuffer()
{
if (_offscreenBitmap != null)
{
if (_offscreenBitmap.getWidth() == getWidth() && _offscreenBitmap.getHeight() == getHeight())
{
return; // no change needed
}
}
_offscreenBitmap = new Bitmap(getWidth(), getHeight());
_offscreenGraphics = Graphics.create(_offscreenBitmap);
}
private void pause()
{
_paused = true;
}
private void resume()
{
if (_running)
{
// Pause the render loop
_paused = false;
synchronized (this) { notifyAll(); }
}
else
{
// Start the render thread.
_running = true;
new Thread(this).start();
}
}
}
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