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/*
 * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * - Redistribution of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * 
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
 * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
 * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
 * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
 * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
 * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
 * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * Sun gratefully acknowledges that this software was originally authored
 * and developed by Kenneth Bradley Russell and Christopher John Kline.
 */

package com.sun.opengl.impl.egl;

import javax.media.opengl.*;

public class EGLDrawable implements GLDrawable {
    private long nativeWindow;
    private long display;
    private GLCapabilities capabilities;
    private GLCapabilitiesChooser chooser;
    private _EGLConfig config;
    private long surface;
    private int[] tmp = new int[1];

    public EGLDrawable(long nativeWindow,
                       GLCapabilities capabilities,
                       GLCapabilitiesChooser chooser) throws GLException {
        this.nativeWindow = nativeWindow;
        this.capabilities = capabilities;
        this.chooser = chooser;

        // Set things up
        EGLDrawableFactory factory = (EGLDrawableFactory) GLDrawableFactory.getFactory();
        // FIXME: need to ultimately fetch this from the native window, at least on X11 platforms
        display = factory.getDisplay();
        int[] attrs = factory.glCapabilities2AttribList(capabilities);
        _EGLConfig[] configs = new _EGLConfig[1];
        int[] numConfigs = new int[1];
        if (!EGL.eglChooseConfig(display,
                                 attrs, 0,
                                 configs, 1,
                                 numConfigs, 0)) {
            throw new GLException("Graphics configuration selection (eglChooseConfig) failed");
        }
        if (numConfigs[0] == 0) {
            throw new GLException("No valid graphics configuration selected from eglChooseConfig");
        }
        config = configs[0];
    }

    public long getDisplay() {
        return display;
    }

    public _EGLConfig getConfig() {
        return config;
    }

    public long getSurface() {
        return surface;
    }

    public GLContext createContext(GLContext shareWith) {
        return new EGLContext(this, shareWith);
    }

    public void setRealized(boolean realized) {
        if (realized) {
            // Create the window surface
            surface = EGL.eglCreateWindowSurface(display, config, nativeWindow, null);
            if (surface == 0) {
                throw new GLException("Creation of window surface (eglCreateWindowSurface) failed");
            }
        }
    }

    public void setSize(int width, int height) {
        // FIXME: anything to do here?
    }

    public int getWidth() {
        if (!EGL.eglQuerySurface(display, surface, EGL.EGL_WIDTH, tmp, 0)) {
            throw new GLException("Error querying surface width");
        }
        return tmp[0];
    }

    public int getHeight() {
        if (!EGL.eglQuerySurface(display, surface, EGL.EGL_HEIGHT, tmp, 0)) {
            throw new GLException("Error querying surface height");
        }
        return tmp[0];
    }

    public void swapBuffers() throws GLException {
        EGL.eglSwapBuffers(display, surface);
    }

    public GLCapabilities getChosenGLCapabilities() {
        // FIXME
        return null;
    }
}