/*

 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package sun.java2d.opengl;

import java.awt.Graphics;

import java.awt.GraphicsConfiguration;

import java.awt.GraphicsDevice;

import java.awt.GraphicsEnvironment;

import java.awt.Image;

import java.awt.Rectangle;

import java.awt.image.ColorModel;

import sun.java2d.SunGraphics2D;

import sun.java2d.SurfaceData;

import sun.lwawt.macosx.CPlatformView;

public abstract class CGLSurfaceData extends OGLSurfaceData {

    protected CPlatformView pView;

    private CGLGraphicsConfig graphicsConfig;

    native void validate(int xoff, int yoff, int width, int height, boolean isOpaque);

    private native void initOps(long pConfigInfo, long pPeerData, long layerPtr,

                                int xoff, int yoff, boolean isOpaque);

    protected native boolean initPbuffer(long pData, long pConfigInfo,

            boolean isOpaque, int width, int height);

    protected CGLSurfaceData(CPlatformView pView, CGLGraphicsConfig gc,

    {

        this.pView = pView;

        this.graphicsConfig = gc;

        long pConfigInfo = gc.getNativeConfigInfo();

        long pPeerData = 0L;

        boolean isOpaque = true;

        if (pView != null) {

            pPeerData = pView.getAWTView();

            isOpaque = pView.isOpaque();

        }

        initOps(pConfigInfo, pPeerData, 0, 0, 0, isOpaque);

    }

    protected CGLSurfaceData(CGLLayer layer, CGLGraphicsConfig gc,

    {

        this.graphicsConfig = gc;

        long pConfigInfo = gc.getNativeConfigInfo();

        long layerPtr = 0L;

        boolean isOpaque = true;

        if (layer != null) {

            layerPtr = layer.getPointer();

            isOpaque = layer.isOpaque();

        }

        initOps(pConfigInfo, 0, layerPtr, 0, 0, isOpaque);

    }

    @Override //SurfaceData

    public GraphicsConfiguration getDeviceConfiguration() {

        return graphicsConfig;

    }

    /**

     * Creates a SurfaceData object representing the primary (front) buffer of

     * an on-screen Window.

     */

    public static CGLWindowSurfaceData createData(CPlatformView pView) {

        CGLGraphicsConfig gc = getGC(pView);

        return new CGLWindowSurfaceData(pView, gc);

    }

    /**

     * Creates a SurfaceData object representing the intermediate buffer

     * between the Java2D flusher thread and the AppKit thread.

     */

    public static CGLLayerSurfaceData createData(CGLLayer layer) {

        CGLGraphicsConfig gc = getGC(layer);

        Rectangle r = layer.getBounds();

        return new CGLLayerSurfaceData(layer, gc, r.width, r.height);

    }

    /**

     * Creates a SurfaceData object representing the back buffer of a

     * double-buffered on-screen Window.

     */

    public static CGLOffScreenSurfaceData createData(CPlatformView pView,

            Image image, int type) {

        CGLGraphicsConfig gc = getGC(pView);

        Rectangle r = pView.getBounds();

        if (type == FLIP_BACKBUFFER) {

            return new CGLOffScreenSurfaceData(pView, gc, r.width, r.height,

                    image, gc.getColorModel(), FLIP_BACKBUFFER);

        } else {

            return new CGLVSyncOffScreenSurfaceData(pView, gc, r.width,

                    r.height, image, gc.getColorModel(), type);

        }

    }

    /**

     * Creates a SurfaceData object representing an off-screen buffer (either a

     * Pbuffer or Texture).

     */

    public static CGLOffScreenSurfaceData createData(CGLGraphicsConfig gc,

            int width, int height, ColorModel cm, Image image, int type) {

        return new CGLOffScreenSurfaceData(null, gc, width, height, image, cm,

                type);

    }

    public static CGLGraphicsConfig getGC(CPlatformView pView) {

        if (pView != null) {

            return (CGLGraphicsConfig)pView.getGraphicsConfiguration();

        } else {

            // REMIND: this should rarely (never?) happen, but what if

            // default config is not CGL?

            GraphicsEnvironment env = GraphicsEnvironment

                .getLocalGraphicsEnvironment();

            GraphicsDevice gd = env.getDefaultScreenDevice();

            return (CGLGraphicsConfig) gd.getDefaultConfiguration();

        }

    }

    public static CGLGraphicsConfig getGC(CGLLayer layer) {

        return (CGLGraphicsConfig)layer.getGraphicsConfiguration();

    }

    public void validate() {

        // Overridden in CGLWindowSurfaceData below

    }

    protected native void clearWindow();

    public static class CGLWindowSurfaceData extends CGLSurfaceData {

        public CGLWindowSurfaceData(CPlatformView pView,

                CGLGraphicsConfig gc) {

        }

        @Override

        public SurfaceData getReplacement() {

            return pView.getSurfaceData();

        }

        @Override

        public Rectangle getBounds() {

            Rectangle r = pView.getBounds();

            return new Rectangle(0, 0, r.width, r.height);

        }

        /**

         * Returns destination Component associated with this SurfaceData.

         */

        @Override

        public Object getDestination() {

            return pView.getDestination();

        }

        public void validate() {

            OGLRenderQueue rq = OGLRenderQueue.getInstance();

            rq.lock();

            try {

                rq.flushAndInvokeNow(new Runnable() {

                    public void run() {

                        Rectangle peerBounds = pView.getBounds();

                        validate(0, 0, peerBounds.width, peerBounds.height, pView.isOpaque());

                    }

                });

            } finally {

                rq.unlock();

            }

        }

        @Override

        public void invalidate() {

            super.invalidate();

            clearWindow();

        }

    }

    /**

     * A surface which implements an intermediate buffer between

     * the Java2D flusher thread and the AppKit thread.

     *

     * This surface serves as a buffer attached to a CGLLayer and

     * the layer redirects all painting to the buffer's graphics.

     */

    public static class CGLLayerSurfaceData extends CGLSurfaceData {

        private CGLLayer layer;

        public CGLLayerSurfaceData(CGLLayer layer, CGLGraphicsConfig gc,

                                   int width, int height) {

            this.layer = layer;

        }

        @Override

        public SurfaceData getReplacement() {

            return layer.getSurfaceData();

        }

        @Override

        boolean isOnScreen() {

            return true;

        }

        @Override

        public Rectangle getBounds() {

            return new Rectangle(width, height);

        }

        @Override

        public Object getDestination() {

            return layer.getDestination();

        }

        @Override

        public int getTransparency() {

            return layer.getTransparency();

        }

        @Override

        public void invalidate() {

            super.invalidate();

            clearWindow();

        }

    }

    /**

     * A surface which implements a v-synced flip back-buffer with COPIED

     * FlipContents.

     *

     * This surface serves as a back-buffer to the outside world, while it is

     * actually an offscreen surface. When the BufferStrategy this surface

     * belongs to is showed, it is first copied to the real private

     * FLIP_BACKBUFFER, which is then flipped.

     */

    public static class CGLVSyncOffScreenSurfaceData extends

            CGLOffScreenSurfaceData {

        private CGLOffScreenSurfaceData flipSurface;

        public CGLVSyncOffScreenSurfaceData(CPlatformView pView,

                CGLGraphicsConfig gc, int width, int height, Image image,

                ColorModel cm, int type) {

            super(pView, gc, width, height, image, cm, type);

            flipSurface = CGLSurfaceData.createData(pView, image,

                    FLIP_BACKBUFFER);

        }

        public SurfaceData getFlipSurface() {

            return flipSurface;

        }

        @Override

        public void flush() {

            flipSurface.flush();

            super.flush();

        }

    }

    public static class CGLOffScreenSurfaceData extends CGLSurfaceData {

        private Image offscreenImage;

        public CGLOffScreenSurfaceData(CPlatformView pView,

                                       CGLGraphicsConfig gc, int width, int height, Image image,

                                       ColorModel cm, int type) {

            offscreenImage = image;

        }

        @Override

        public SurfaceData getReplacement() {

            return restoreContents(offscreenImage);

        }

        @Override

        public Rectangle getBounds() {

            if (type == FLIP_BACKBUFFER) {

                Rectangle r = pView.getBounds();

                return new Rectangle(0, 0, r.width, r.height);

            } else {

                return new Rectangle(width, height);

            }

        }

        /**

         * Returns destination Image associated with this SurfaceData.

         */

        @Override

        public Object getDestination() {

            return offscreenImage;

        }

    }

    // Mac OS X specific APIs for JOGL/Java2D bridge...

    // given a surface create and attach GL context, then return it

    private native static long createCGLContextOnSurface(CGLSurfaceData sd,

            long sharedContext);

    public static long createOGLContextOnSurface(Graphics g, long sharedContext) {

        SurfaceData sd = ((SunGraphics2D) g).surfaceData;

        if ((sd instanceof CGLSurfaceData) == true) {

            CGLSurfaceData cglsd = (CGLSurfaceData) sd;

            return createCGLContextOnSurface(cglsd, sharedContext);

        } else {

            return 0L;

        }

    }

    // returns whether or not the makeCurrent operation succeeded

    native static boolean makeCGLContextCurrentOnSurface(CGLSurfaceData sd,

            long ctx);

    public static boolean makeOGLContextCurrentOnSurface(Graphics g, long ctx) {

        SurfaceData sd = ((SunGraphics2D) g).surfaceData;

        if ((ctx != 0L) && ((sd instanceof CGLSurfaceData) == true)) {

            CGLSurfaceData cglsd = (CGLSurfaceData) sd;

            return makeCGLContextCurrentOnSurface(cglsd, ctx);

        } else {

            return false;

        }

    }

    // additional cleanup

    private native static void destroyCGLContext(long ctx);

    public static void destroyOGLContext(long ctx) {

        if (ctx != 0L) {

            destroyCGLContext(ctx);

        }

    }

}