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 * 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

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package sun.java2d.d3d;

import sun.java2d.pipe.BufferedContext;

import sun.java2d.pipe.RenderBuffer;

import sun.java2d.pipe.RenderQueue;

import sun.java2d.pipe.hw.ContextCapabilities;

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

import static sun.java2d.pipe.hw.ContextCapabilities.*;

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

/**

 * Note that the RenderQueue lock must be acquired before calling any of

 * the methods in this class.

 */

class D3DContext extends BufferedContext {

    private final D3DGraphicsDevice device;

    D3DContext(RenderQueue rq, D3DGraphicsDevice device) {

        super(rq);

        this.device = device;

    }

    /**

     * Invalidates the currentContext field to ensure that we properly

     * revalidate the D3DContext (make it current, etc.) next time through

     * the validate() method.  This is typically invoked from methods

     * that affect the current context state (e.g. disposing a context or

     * surface).

     */

    static void invalidateCurrentContext() {

        // assert D3DRenderQueue.getInstance().lock.isHeldByCurrentThread();

        // invalidate the current Java-level context so that we

        // revalidate everything the next time around

        if (currentContext != null) {

            currentContext.invalidateContext();

            currentContext = null;

        }

        // invalidate the context reference at the native level, and

        // then flush the queue so that we have no pending operations

        // dependent on the current context

        D3DRenderQueue rq = D3DRenderQueue.getInstance();

        rq.ensureCapacity(4);

        rq.getBuffer().putInt(INVALIDATE_CONTEXT);

        rq.flushNow();

    }

    /**

     * Sets the current context on the native level to be the one passed as

     * the argument.

     * If the context is not the same as the defaultContext the latter

     * will be reset to null.

     *

     * This call is needed when copying from a SW surface to a Texture

     * (the upload test) or copying from d3d to SW surface to make sure we

     * have the correct current context.

     *

     * @param d3dc the context to be made current on the native level

     */

    static void setScratchSurface(D3DContext d3dc) {

        // assert D3DRenderQueue.getInstance().lock.isHeldByCurrentThread();

        // invalidate the current context

        if (d3dc != currentContext) {

            currentContext = null;

        }

        // set the scratch context

        D3DRenderQueue rq = D3DRenderQueue.getInstance();

        RenderBuffer buf = rq.getBuffer();

        rq.ensureCapacity(8);

        buf.putInt(SET_SCRATCH_SURFACE);

        buf.putInt(d3dc.getDevice().getScreen());

    }

    public RenderQueue getRenderQueue() {

        return D3DRenderQueue.getInstance();

    }

    @Override

    public void saveState() {

        // assert rq.lock.isHeldByCurrentThread();

        // reset all attributes of this and current contexts

        invalidateContext();

        invalidateCurrentContext();

        setScratchSurface(this);

        // save the state on the native level

        rq.ensureCapacity(4);

        buf.putInt(SAVE_STATE);

        rq.flushNow();

    }

    @Override

    public void restoreState() {

        // assert rq.lock.isHeldByCurrentThread();

        // reset all attributes of this and current contexts

        invalidateContext();

        invalidateCurrentContext();

        setScratchSurface(this);

        // restore the state on the native level

        rq.ensureCapacity(4);

        buf.putInt(RESTORE_STATE);

        rq.flushNow();

    }

    D3DGraphicsDevice getDevice() {

        return device;

    }

    static class D3DContextCaps extends ContextCapabilities {

        /**

         * Indicates the presence of pixel shaders (v2.0 or greater).

         * This cap will only be set if the hardware supports the minimum number

         * of texture units.

         */

        static final int CAPS_LCD_SHADER       = (FIRST_PRIVATE_CAP << 0);

        /**

         * Indicates the presence of pixel shaders (v2.0 or greater).

         * This cap will only be set if the hardware meets our

         * minimum requirements.

         */

        static final int CAPS_BIOP_SHADER      = (FIRST_PRIVATE_CAP << 1);

        /**

         * Indicates that the device was successfully initialized and can

         * be safely used.

         */

        static final int CAPS_DEVICE_OK        = (FIRST_PRIVATE_CAP << 2);

        /**

         * Indicates that the device has all of the necessary capabilities

         * to support the Antialiasing Pixel Shader program.

         */

        static final int CAPS_AA_SHADER        = (FIRST_PRIVATE_CAP << 3);

        D3DContextCaps(int caps, String adapterId) {

            super(caps, adapterId);

        }

        @Override

        public String toString() {

            StringBuffer buf = new StringBuffer(super.toString());

            if ((caps & CAPS_LCD_SHADER) != 0) {

                buf.append("CAPS_LCD_SHADER|");

            }

            if ((caps & CAPS_BIOP_SHADER) != 0) {

                buf.append("CAPS_BIOP_SHADER|");

            }

            if ((caps & CAPS_AA_SHADER) != 0) {

                buf.append("CAPS_AA_SHADER|");

            }

            if ((caps & CAPS_DEVICE_OK) != 0) {

                buf.append("CAPS_DEVICE_OK|");

            }

            return buf.toString();

        }

    }

}