/*

 * Copyright (c) 2007, 2008, 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

 * or visit www.oracle.com if you need additional information or have any

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 */

package sun.java2d.d3d;

import java.awt.Dialog;

import java.awt.DisplayMode;

import java.awt.Frame;

import java.awt.GraphicsConfiguration;

import java.awt.Rectangle;

import java.awt.Toolkit;

import java.awt.Window;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.awt.event.WindowListener;

import java.awt.peer.WindowPeer;

import java.util.ArrayList;

import sun.awt.Win32GraphicsDevice;

import sun.awt.windows.WWindowPeer;

import sun.java2d.pipe.hw.ContextCapabilities;

import sun.java2d.windows.WindowsFlags;

import static sun.java2d.pipe.BufferedOpCodes.*;

import static sun.java2d.d3d.D3DContext.D3DContextCaps.*;

import sun.java2d.d3d.D3DContext.D3DContextCaps;

/**

 * This class implements D3D-specific functionality, such as fullscreen

 * exclusive mode and display changes.  It is kept separate from

 * Win32GraphicsDevice to help avoid overburdening the parent class.

 */

public class D3DGraphicsDevice extends Win32GraphicsDevice {

    private D3DContext context;

    private static boolean d3dAvailable;

    private ContextCapabilities d3dCaps;

    private static native boolean initD3D();

    static {

        // loading the library doesn't help because we need the

        // toolkit thread running, so we have to call getDefaultToolkit()

        Toolkit.getDefaultToolkit();

        d3dAvailable = initD3D();

        if (d3dAvailable) {

            // we don't use pixel formats for the d3d pipeline

            pfDisabled = true;

            sun.misc.PerfCounter.getD3DAvailable().set(1);

        } else {

            sun.misc.PerfCounter.getD3DAvailable().set(0);

        }

    }

    /**

     * Used to construct a Direct3D-enabled GraphicsDevice.

     *

     * @return a D3DGraphicsDevice if it could be created

     * successfully, null otherwise.

     */

    public static D3DGraphicsDevice createDevice(int screen) {

        if (!d3dAvailable) {

            return null;

        }

        ContextCapabilities d3dCaps = getDeviceCaps(screen);

        // could not initialize the device successfully

        if ((d3dCaps.getCaps() & CAPS_DEVICE_OK) == 0) {

            if (WindowsFlags.isD3DVerbose()) {

                System.out.println("Could not enable Direct3D pipeline on " +

                                   "screen " + screen);

            }

            return null;

        }

        if (WindowsFlags.isD3DVerbose()) {

            System.out.println("Direct3D pipeline enabled on screen " + screen);

        }

        D3DGraphicsDevice gd = new D3DGraphicsDevice(screen, d3dCaps);

        return gd;

    }

    private static native int getDeviceCapsNative(int screen);

    private static native String getDeviceIdNative(int screen);

    private static ContextCapabilities getDeviceCaps(final int screen) {

        ContextCapabilities d3dCaps = null;

        D3DRenderQueue rq = D3DRenderQueue.getInstance();

        rq.lock();

        try {

            class Result {

                int caps;

                String id;

            };

            final Result res = new Result();

            rq.flushAndInvokeNow(new Runnable() {

                public void run() {

                    res.caps = getDeviceCapsNative(screen);

                    res.id = getDeviceIdNative(screen);

                }

            });

            d3dCaps = new D3DContextCaps(res.caps, res.id);

        } finally {

            rq.unlock();

        }

        return d3dCaps != null ? d3dCaps : new D3DContextCaps(CAPS_EMPTY, null);

    }

    public final boolean isCapPresent(int cap) {

        return ((d3dCaps.getCaps() & cap) != 0);

    }

    private D3DGraphicsDevice(int screennum, ContextCapabilities d3dCaps) {

        super(screennum);

        descString = "D3DGraphicsDevice[screen="+screennum;

        this.d3dCaps = d3dCaps;

        context = new D3DContext(D3DRenderQueue.getInstance(), this);

    }

    public boolean isD3DEnabledOnDevice() {

        return isValid() && isCapPresent(CAPS_DEVICE_OK);

    }

    /**

     * Returns true if d3d pipeline has been successfully initialized.

     * @return true if d3d pipeline is initialized, false otherwise

     */

    public static boolean isD3DAvailable() {

        return d3dAvailable;

    }

    /**

     * Return the owning Frame for a given Window.  Used in setFSWindow below

     * to set the properties of the owning Frame when a Window goes

     * into fullscreen mode.

     */

    private Frame getToplevelOwner(Window w) {

        Window owner = w;

        while (owner != null) {

            owner = owner.getOwner();

            if (owner instanceof Frame) {

                return (Frame) owner;

            }

        }

        // could get here if passed Window is an owner-less Dialog

        return null;

    }

    private boolean fsStatus;

    private Rectangle ownerOrigBounds = null;

    private boolean ownerWasVisible;

    private Window realFSWindow;

    private WindowListener fsWindowListener;

    private boolean fsWindowWasAlwaysOnTop;

    private static native boolean enterFullScreenExclusiveNative(int screen,

                                                                 long hwnd);

    @Override

    protected void enterFullScreenExclusive(final int screen, WindowPeer wp)

    {

        final WWindowPeer wpeer = (WWindowPeer)realFSWindow.getPeer();

        D3DRenderQueue rq = D3DRenderQueue.getInstance();

        rq.lock();

        try {

            rq.flushAndInvokeNow(new Runnable() {

                public void run() {

                    long hwnd = wpeer.getHWnd();

                    if (hwnd == 0l) {

                        // window is disposed

                        fsStatus = false;

                        return;

                    }

                    fsStatus = enterFullScreenExclusiveNative(screen, hwnd);

                }

            });

        } finally {

            rq.unlock();

        }

        if (!fsStatus) {

            super.enterFullScreenExclusive(screen, wp);

        }

    }

    private static native boolean exitFullScreenExclusiveNative(int screen);

    @Override

    protected void exitFullScreenExclusive(final int screen, WindowPeer w) {

        if (fsStatus) {

            D3DRenderQueue rq = D3DRenderQueue.getInstance();

            rq.lock();

            try {

                rq.flushAndInvokeNow(new Runnable() {

                    public void run() {

                        exitFullScreenExclusiveNative(screen);

                    }

                });

            } finally {

                rq.unlock();

            }

        } else {

            super.exitFullScreenExclusive(screen, w);

        }

    }

    /**

     * WindowAdapter class for the full-screen frame, responsible for

     * restoring the devices. This is important to do because unless the device

     * is restored it will not go back into the FS mode once alt+tabbed out.

     * This is a problem for windows for which we do not do any d3d-related

     * operations (like when we disabled on-screen rendering).

     *

     * REMIND: we create an instance per each full-screen device while a single

     * instance would suffice (but requires more management).

     */

    private static class D3DFSWindowAdapter extends WindowAdapter {

        @Override

        public void windowDeactivated(WindowEvent e) {

            D3DRenderQueue.getInstance().restoreDevices();

        }

        @Override

        public void windowActivated(WindowEvent e) {

            D3DRenderQueue.getInstance().restoreDevices();

        }

    }

    @Override

    protected void addFSWindowListener(Window w) {

        // if the window is not a toplevel (has an owner) we have to use the

        // real toplevel to enter the full-screen mode with (4933099).

        if (!(w instanceof Frame) && !(w instanceof Dialog) &&

            (realFSWindow = getToplevelOwner(w)) != null)

        {

            ownerOrigBounds = realFSWindow.getBounds();

            WWindowPeer fp = (WWindowPeer)realFSWindow.getPeer();

            ownerWasVisible = realFSWindow.isVisible();

            Rectangle r = w.getBounds();

            // we use operations on peer instead of component because calling

            // them on component will take the tree lock

            fp.reshape(r.x, r.y, r.width, r.height);

            fp.setVisible(true);

        } else {

            realFSWindow = w;

        }

        fsWindowWasAlwaysOnTop = realFSWindow.isAlwaysOnTop();

        ((WWindowPeer)realFSWindow.getPeer()).setAlwaysOnTop(true);

        fsWindowListener = new D3DFSWindowAdapter();

        realFSWindow.addWindowListener(fsWindowListener);

    }

    @Override

    protected void removeFSWindowListener(Window w) {

        realFSWindow.removeWindowListener(fsWindowListener);

        fsWindowListener = null;

        /**

         * Bug 4933099: There is some funny-business to deal with when this

         * method is called with a Window instead of a Frame.  See 4836744

         * for more information on this.  One side-effect of our workaround

         * for the problem is that the owning Frame of a Window may end

         * up getting resized during the fullscreen process.  When we

         * return from fullscreen mode, we should resize the Frame to

         * its original size (just like the Window is being resized

         * to its original size in GraphicsDevice).

         */

        WWindowPeer wpeer = (WWindowPeer)realFSWindow.getPeer();

        if (wpeer != null) {

            if (ownerOrigBounds != null) {

                // if the window went into fs mode before it was realized it

                // could have (0,0) dimensions

                if (ownerOrigBounds.width  == 0) ownerOrigBounds.width  = 1;

                if (ownerOrigBounds.height == 0) ownerOrigBounds.height = 1;

                wpeer.reshape(ownerOrigBounds.x,     ownerOrigBounds.y,

                              ownerOrigBounds.width, ownerOrigBounds.height);

                if (!ownerWasVisible) {

                    wpeer.setVisible(false);

                }

                ownerOrigBounds = null;

            }

            if (!fsWindowWasAlwaysOnTop) {

                wpeer.setAlwaysOnTop(false);

            }

        }

        realFSWindow = null;

    }

    private static native DisplayMode getCurrentDisplayModeNative(int screen);

    @Override

    protected DisplayMode getCurrentDisplayMode(final int screen) {

        D3DRenderQueue rq = D3DRenderQueue.getInstance();

        rq.lock();

        try {

            class Result {

                DisplayMode dm = null;

            };

            final Result res = new Result();

            rq.flushAndInvokeNow(new Runnable() {

                public void run() {

                    res.dm = getCurrentDisplayModeNative(screen);

                }

            });

            if (res.dm == null) {

                return super.getCurrentDisplayMode(screen);

            }

            return res.dm;

        } finally {

            rq.unlock();

        }

    }

    private static native void configDisplayModeNative(int screen, long hwnd,

                                                       int width, int height,

                                                       int bitDepth,

                                                       int refreshRate);

    @Override

    protected void configDisplayMode(final int screen, final WindowPeer w,

                                     final int width, final int height,

                                     final int bitDepth, final int refreshRate)

    {

        // we entered fs mode via gdi

        if (!fsStatus) {

            super.configDisplayMode(screen, w, width, height, bitDepth,

                                    refreshRate);

            return;

        }

        final WWindowPeer wpeer = (WWindowPeer)realFSWindow.getPeer();

        // REMIND: we do this before we switch the display mode, so

        // the dimensions may be exceeding the dimensions of the screen,

        // is this a problem?

        // update the bounds of the owner frame

        if (getFullScreenWindow() != realFSWindow) {

            Rectangle screenBounds = getDefaultConfiguration().getBounds();

            wpeer.reshape(screenBounds.x, screenBounds.y, width, height);

        }

        D3DRenderQueue rq = D3DRenderQueue.getInstance();

        rq.lock();

        try {

            rq.flushAndInvokeNow(new Runnable() {

                public void run() {

                    long hwnd = wpeer.getHWnd();

                    if (hwnd == 0l) {

                        // window is disposed

                        return;

                    }

                    // REMIND: do we really need a window here?

                    // we should probably just use the current one

                    configDisplayModeNative(screen, hwnd, width, height,

                                            bitDepth, refreshRate);

                }

            });

        } finally {

            rq.unlock();

        }

    }

    private static native void enumDisplayModesNative(int screen,

                                                      ArrayList modes);

    @Override

    protected void enumDisplayModes(final int screen, final ArrayList modes) {

        D3DRenderQueue rq = D3DRenderQueue.getInstance();

        rq.lock();

        try {

            rq.flushAndInvokeNow(new Runnable() {

                public void run() {

                    enumDisplayModesNative(screen, modes);

                }

            });

            if (modes.size() == 0) {

                modes.add(getCurrentDisplayModeNative(screen));

            }

        } finally {

            rq.unlock();

        }

    }

    private static native long getAvailableAcceleratedMemoryNative(int screen);

    @Override

    public int getAvailableAcceleratedMemory() {

        D3DRenderQueue rq = D3DRenderQueue.getInstance();

        rq.lock();

        try {

            class Result {

                long mem = 0L;

            };

            final Result res = new Result();

            rq.flushAndInvokeNow(new Runnable() {

                public void run() {

                    res.mem = getAvailableAcceleratedMemoryNative(getScreen());

                }

            });

            return (int)res.mem;

        } finally {

            rq.unlock();

        }

    }

    @Override

    public GraphicsConfiguration[] getConfigurations() {

        if (configs == null) {

            if (isD3DEnabledOnDevice()) {

                defaultConfig = getDefaultConfiguration();

                if (defaultConfig != null) {

                    configs = new GraphicsConfiguration[1];

                    configs[0] = defaultConfig;

                    return configs.clone();

                }

            }

        }

        return super.getConfigurations();

    }

    @Override

    public GraphicsConfiguration getDefaultConfiguration() {

        if (defaultConfig == null) {

            if (isD3DEnabledOnDevice()) {

                defaultConfig = new D3DGraphicsConfig(this);

            } else {

                defaultConfig = super.getDefaultConfiguration();

            }

        }

        return defaultConfig;

    }

    private static native boolean isD3DAvailableOnDeviceNative(int screen);

    // REMIND: this method is not used now, we use caps instead

    public static boolean isD3DAvailableOnDevice(final int screen) {

        if (!d3dAvailable) {

            return false;

        }

        // REMIND: should we cache the result per device somehow,

        // and then reset and retry it on display change?

        D3DRenderQueue rq = D3DRenderQueue.getInstance();

        rq.lock();

        try {

            class Result {

                boolean avail = false;

            };

            final Result res = new Result();

            rq.flushAndInvokeNow(new Runnable() {

                public void run() {

                    res.avail = isD3DAvailableOnDeviceNative(screen);

                }

            });

            return res.avail;

        } finally {

            rq.unlock();

        }

    }

    D3DContext getContext() {

        return context;

    }

    ContextCapabilities getContextCapabilities() {

        return d3dCaps;

    }

    @Override

    public void displayChanged() {

        super.displayChanged();

        // REMIND: make sure this works when the device is lost and we don't

        // disable d3d too eagerly

        if (d3dAvailable) {

            d3dCaps = getDeviceCaps(getScreen());

        }

    }

    @Override

    protected void invalidate(int defaultScreen) {

        super.invalidate(defaultScreen);

        // REMIND: this is a bit excessive, isD3DEnabledOnDevice will return

        // false anyway because the device is invalid

        d3dCaps = new D3DContextCaps(CAPS_EMPTY, null);

    }

}