/*

 * Copyright (c) 2010, 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.xr;

import java.awt.*;

import java.awt.geom.*;

import java.security.AccessController;

import java.security.PrivilegedAction;

import sun.font.*;

import sun.java2d.*;

import sun.java2d.jules.*;

import sun.java2d.loops.*;

/**

 * Manages per-application resources, e.g. the 1x1 pixmap used for solid color

 * fill as well as per-application state e.g. the currently set source picture

 * used for composition .

 *

 * @author Clemens Eisserer

 */

public class XRCompositeManager {

    private static boolean enableGradCache = true;

    private static XRCompositeManager instance;

    XRSurfaceData src;

    XRSurfaceData texture;

    XRSurfaceData gradient;

    int alphaMask = XRUtils.None;

    XRColor solidColor = new XRColor();

    float extraAlpha = 1.0f;

    byte compRule = XRUtils.PictOpOver;

    XRColor alphaColor = new XRColor();

    XRSurfaceData solidSrcPict;

    int alphaMaskPict;

    int gradCachePixmap;

    int gradCachePicture;

    boolean xorEnabled = false;

    int validatedPixel = 0;

    Composite validatedComp;

    Paint validatedPaint;

    float validatedExtraAlpha = 1.0f;

    XRBackend con;

    MaskTileManager maskBuffer;

    XRTextRenderer textRenderer;

    XRMaskImage maskImage;

    public static synchronized XRCompositeManager getInstance(

            XRSurfaceData surface) {

        if (instance == null) {

            instance = new XRCompositeManager(surface);

        }

        return instance;

    }

    private XRCompositeManager(XRSurfaceData surface) {

        con = new XRBackendNative();

        // con = XRBackendJava.getInstance();

        String gradProp =

            AccessController.doPrivileged(new PrivilegedAction<String>() {

                public String run() {

                    return System.getProperty("sun.java2d.xrgradcache");

                }

            });

        enableGradCache = gradProp == null ||

                          !(gradProp.equalsIgnoreCase("false") ||

                          gradProp.equalsIgnoreCase("f"));

        XRPaints.register(this);

        initResources(surface);

        maskBuffer = new MaskTileManager(this, surface.getXid());

        textRenderer = new XRTextRenderer(this);

        maskImage = new XRMaskImage(this, surface.getXid());

    }

    public void initResources(XRSurfaceData surface) {

        int parentXid = surface.getXid();

        int solidPixmap = con.createPixmap(parentXid, 32, 1, 1);

        int solidSrcPictXID = con.createPicture(solidPixmap,

                XRUtils.PictStandardARGB32);

        con.setPictureRepeat(solidSrcPictXID, XRUtils.RepeatNormal);

        con.renderRectangle(solidSrcPictXID, XRUtils.PictOpSrc,

                XRColor.FULL_ALPHA, 0, 0, 1, 1);

        solidSrcPict = new XRSurfaceData.XRInternalSurfaceData(con,

        setForeground(0);

        int extraAlphaMask = con.createPixmap(parentXid, 8, 1, 1);

        alphaMaskPict = con.createPicture(extraAlphaMask,

                XRUtils.PictStandardA8);

        con.setPictureRepeat(alphaMaskPict, XRUtils.RepeatNormal);

        con.renderRectangle(alphaMaskPict, XRUtils.PictOpClear,

                XRColor.NO_ALPHA, 0, 0, 1, 1);

        if (enableGradCache) {

            gradCachePixmap = con.createPixmap(parentXid, 32,

                    MaskTileManager.MASK_SIZE, MaskTileManager.MASK_SIZE);

            gradCachePicture = con.createPicture(gradCachePixmap,

                    XRUtils.PictStandardARGB32);

        }

    }

    public void setForeground(int pixel) {

        solidColor.setColorValues(pixel, false);

        con.renderRectangle(solidSrcPict.picture, XRUtils.PictOpSrc,

                solidColor, 0, 0, 1, 1);

    }

    public void setGradientPaint(XRSurfaceData gradient) {

        if (this.gradient != null) {

            con.freePicture(this.gradient.picture);

        }

        this.gradient = gradient;

        src = gradient;

    }

    public void setTexturePaint(XRSurfaceData texture) {

        this.texture = texture;

        src = texture;

    }

    public void XRResetPaint() {

        src = solidSrcPict;

    }

    public void validateCompositeState(Composite comp, AffineTransform xform,

            Paint paint, SunGraphics2D sg2d) {

        boolean updatePaint = (paint != validatedPaint) || paint == null;

        // validate composite

        if ((comp != validatedComp)) {

            if (comp != null) {

                setComposite(comp);

            } else {

                comp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER);

                setComposite(comp);

            }

            // the paint state is dependent on the composite state, so make

            // sure we update the color below

            updatePaint = true;

            validatedComp = comp;

        }

        if (sg2d != null && validatedPixel != sg2d.pixel) {

            validatedPixel = sg2d.pixel;

            setForeground(validatedPixel);

        }

        // validate paint

        if (updatePaint) {

            if (paint != null && sg2d != null

                    && sg2d.paintState >= SunGraphics2D.PAINT_GRADIENT) {

                XRPaints.setPaint(sg2d, paint);

            } else {

                XRResetPaint();

            }

            validatedPaint = paint;

        }

        if (src != solidSrcPict) {

            AffineTransform at = (AffineTransform) xform.clone();

            try {

                at.invert();

            } catch (NoninvertibleTransformException e) {

                at.setToIdentity();

            }

        }

    }

    private void setComposite(Composite comp) {

        if (comp instanceof AlphaComposite) {

            AlphaComposite aComp = (AlphaComposite) comp;

            validatedExtraAlpha = aComp.getAlpha();

            this.compRule = XRUtils.j2dAlphaCompToXR(aComp.getRule());

            this.extraAlpha = validatedExtraAlpha;

            if (extraAlpha == 1.0f) {

                alphaMask = XRUtils.None;

                alphaColor.alpha = XRColor.FULL_ALPHA.alpha;

            } else {

                alphaColor.alpha = XRColor

                        .byteToXRColorValue((int) (extraAlpha * 255));

                alphaMask = alphaMaskPict;

                con.renderRectangle(alphaMaskPict, XRUtils.PictOpSrc,

                        alphaColor, 0, 0, 1, 1);

            }

            xorEnabled = false;

        } else if (comp instanceof XORComposite) {

            /* XOR composite validation is handled in XRSurfaceData */

            xorEnabled = true;

        } else {

            throw new InternalError(

                    "Composite accaleration not implemented for: "

                            + comp.getClass().getName());

        }

    }

    public boolean maskRequired() {

        return (!xorEnabled)

                && ((src != solidSrcPict)

                        || (src == solidSrcPict && solidColor.alpha != 0xffff) || (extraAlpha != 1.0f));

    }

    public void XRComposite(int src, int mask, int dst, int srcX, int srcY,

            int maskX, int maskY, int dstX, int dstY, int width, int height) {

        int cachedSrc = (src == XRUtils.None) ? this.src.picture : src;

        int cachedX = srcX;

        int cachedY = srcY;

        if (enableGradCache && gradient != null

                && cachedSrc == gradient.picture) {

            con.renderComposite(XRUtils.PictOpSrc, gradient.picture,

                    XRUtils.None, gradCachePicture, srcX, srcY, 0, 0, 0, 0,

                    width, height);

            cachedX = 0;

            cachedY = 0;

            cachedSrc = gradCachePicture;

        }

        con.renderComposite(compRule, cachedSrc, mask, dst, cachedX, cachedY,

                maskX, maskY, dstX, dstY, width, height);

    }

    public void XRCompositeTraps(int dst, int srcX, int srcY,

            TrapezoidList trapList) {

        int renderReferenceX = 0;

        int renderReferenceY = 0;

        if (trapList.getP1YLeft(0) < trapList.getP2YLeft(0)) {

            renderReferenceX = trapList.getP1XLeft(0);

            renderReferenceY = trapList.getP1YLeft(0);

        } else {

            renderReferenceX = trapList.getP2XLeft(0);

            renderReferenceY = trapList.getP2YLeft(0);

        }

        renderReferenceX = (int) Math.floor(XRUtils

                .XFixedToDouble(renderReferenceX));

        renderReferenceY = (int) Math.floor(XRUtils

                .XFixedToDouble(renderReferenceY));

        con.renderCompositeTrapezoids(compRule, src.picture,

                XRUtils.PictStandardA8, dst, renderReferenceX,

                renderReferenceY, trapList);

    }

    public void XRRenderRectangles(XRSurfaceData dst, GrowableRectArray rects) {

        if (xorEnabled) {

            con.GCRectangles(dst.getXid(), dst.getGC(), rects);

        } else {

            if (rects.getSize() == 1) {

                con.renderRectangle(dst.getPicture(), compRule, solidColor,

                        rects.getX(0), rects.getY(0), rects.getWidth(0), rects.getHeight(0));

            } else {

                con.renderRectangles(dst.getPicture(), compRule, solidColor, rects);

            }

        }

    }

    public void compositeBlit(XRSurfaceData src, XRSurfaceData dst, int sx,

            int sy, int dx, int dy, int w, int h) {

        con.renderComposite(compRule, src.picture, alphaMask, dst.picture, sx,

                sy, 0, 0, dx, dy, w, h);

    }

    public void compositeText(XRSurfaceData dst, int sx, int sy,

            int glyphSet, int maskFormat, GrowableEltArray elts) {

        con.XRenderCompositeText(compRule, src.picture, dst.picture,

                maskFormat, sx, sy, 0, 0, glyphSet, elts);

    }

    public XRColor getMaskColor() {

        return !isTexturePaintActive() ? XRColor.FULL_ALPHA : getAlphaColor();

    }

    public int getExtraAlphaMask() {

        return alphaMask;

    }

    public boolean isTexturePaintActive() {

        return src == texture;

    }

    public XRColor getAlphaColor() {

        return alphaColor;

    }

    public XRBackend getBackend() {

        return con;

    }

    public float getExtraAlpha() {

        return validatedExtraAlpha;

    }

    public byte getCompRule() {

        return compRule;

    }

    public XRTextRenderer getTextRenderer() {

        return textRenderer;

    }

    public MaskTileManager getMaskBuffer() {

        return maskBuffer;

    }

    public XRMaskImage getMaskImage() {

        return maskImage;

    }

}