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/*
* Copyright 2010 Sun Microsystems, Inc. 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package sun.java2d.xr;
import java.awt.*;
import java.awt.geom.*;
/**
* Management of mask used for some blit-types.
*
* @author Clemens Eisserer
*/
public class XRMaskImage {
private static final int MASK_SCALE_FACTOR = 8;
private static final int BLIT_MASK_SIZE = 8;
Dimension blitMaskDimensions = new Dimension(BLIT_MASK_SIZE, BLIT_MASK_SIZE);
int blitMaskPixmap;
int blitMaskPicture;
int lastMaskWidth = 0;
int lastMaskHeight = 0;
AffineTransform lastMaskTransform;
XRCompositeManager xrMgr;
XRBackend con;
public XRMaskImage(XRCompositeManager xrMgr, int parentDrawable) {
this.xrMgr = xrMgr;
this.con = xrMgr.getBackend();
initBlitMask(parentDrawable, BLIT_MASK_SIZE, BLIT_MASK_SIZE);
}
/**
* Prepares a mask used by a TransformedBlit, fills mask-contents and applies
* transformation.
*/
public int prepareBlitMask(XRSurfaceData dst, AffineTransform maskTX, int width,
int height) {
int maskWidth = Math.max(width / MASK_SCALE_FACTOR, 1);
int maskHeight = Math.max(height / MASK_SCALE_FACTOR, 1);
maskTX.scale(((double) width) / maskWidth, ((double) height) / maskHeight);
try {
maskTX.invert();
} catch (NoninvertibleTransformException ex) {
maskTX.setToIdentity();
}
ensureBlitMaskSize(maskWidth, maskHeight);
if (lastMaskTransform == null || !lastMaskTransform.equals(maskTX)) {
con.setPictureTransform(blitMaskPicture, maskTX);
lastMaskTransform = maskTX;
}
if (lastMaskWidth != maskWidth || lastMaskHeight != maskHeight) {
//Only clear mask, if previous mask area is larger than new one, otherwise simple overpaint it
if (lastMaskWidth > maskWidth || lastMaskHeight > maskHeight) {
con.renderRectangle(blitMaskPicture, XRUtils.PictOpClear, XRColor.NO_ALPHA, 0, 0, lastMaskWidth, lastMaskHeight);
}
con.renderRectangle(blitMaskPicture, XRUtils.PictOpSrc, xrMgr.getAlphaColor(), 0, 0, maskWidth, maskHeight);
}
lastMaskWidth = maskWidth;
lastMaskHeight = maskHeight;
return blitMaskPicture;
}
private void initBlitMask(int parentDrawable, int width, int height) {
int newPM = con.createPixmap(parentDrawable, 8, width, height);
int newPict = con.createPicture(newPM, XRUtils.PictStandardA8);
/*Free old mask*/
if (blitMaskPixmap != 0) {
con.freePixmap(blitMaskPixmap);
con.freePicture(blitMaskPicture);
}
blitMaskPixmap = newPM;
blitMaskPicture = newPict;
con.renderRectangle(blitMaskPicture, XRUtils.PictOpClear, XRColor.NO_ALPHA, 0, 0, width, height);
blitMaskDimensions.width = width;
blitMaskDimensions.height = height;
lastMaskWidth = 0;
lastMaskHeight = 0;
lastMaskTransform = null;
}
private void ensureBlitMaskSize(int minSizeX, int minSizeY) {
if (minSizeX > blitMaskDimensions.width || minSizeY > blitMaskDimensions.height) {
int newWidth = Math.max(minSizeX, blitMaskDimensions.width);
int newHeight = Math.max(minSizeY, blitMaskDimensions.height);
initBlitMask(blitMaskPixmap, newWidth, newHeight);
}
}
}
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