1 /*

     2  * Copyright 2010 Sun Microsystems, Inc.  All Rights Reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.  Sun designates this

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

     9  * by Sun in the LICENSE file that accompanied this code.

    10  *

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

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

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

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

    21  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 package sun.java2d.xr;

    27 

    28 import static java.lang.Math.min;

    29 import static java.lang.Math.max;

    30 import static sun.java2d.xr.MaskTileManager.MASK_SIZE;

    31 

    32 /**

    33  * This class implements region tracking, used by the tiled-mask code.

    34  *

    35  * @author Clemens Eisserer

    36  */

    37 

    38 public class DirtyRegion implements Cloneable {

    39     int x, y, x2, y2;

    40 

    41     public DirtyRegion() {

    42         clear();

    43     }

    44 

    45     public void clear() {

    46         x = Integer.MAX_VALUE;

    47         y = Integer.MAX_VALUE;

    48         x2 = Integer.MIN_VALUE;

    49         y2 = Integer.MIN_VALUE;

    50     }

    51 

    52     public void growDirtyRegion(int x, int y, int x2, int y2) {

    53         this.x = min(x, this.x);

    54         this.y = min(y, this.y);

    55         this.x2 = max(x2, this.x2);

    56         this.y2 = max(y2, this.y2);

    57     }

    58 

    59     public int getWidth() {

    60         return x2 - x;

    61     }

    62 

    63     public int getHeight() {

    64         return y2 - y;

    65     }

    66 

    67     public void growDirtyRegionTileLimit(int x, int y, int x2, int y2) {

    68         if (x < this.x) {

    69             this.x = max(x, 0);

    70         }

    71         if (y < this.y) {

    72             this.y = max(y, 0);

    73         }

    74         if (x2 > this.x2) {

    75             this.x2 = min(x2, MASK_SIZE);

    76         }

    77         if (y2 > this.y2) {

    78             this.y2 = min(y2, MASK_SIZE);

    79         }

    80     }

    81 

    82     public static DirtyRegion combineRegion(DirtyRegion region1,

    83                                             DirtyRegion region2) {

    84         DirtyRegion region = new DirtyRegion();

    85         region.x = min(region1.x, region2.x);

    86         region.y = min(region1.y, region2.y);

    87         region.x2 = max(region1.x2, region2.x2);

    88         region.y2 = max(region1.y2, region2.y2);

    89         return region;

    90     }

    91 

    92     public void setDirtyLineRegion(int x1, int y1, int x2, int y2) {

    93         if (x1 < x2) {

    94             this.x = x1;

    95             this.x2 = x2;

    96         } else {

    97             this.x = x2;

    98             this.x2 = x1;

    99         }

   100 

   101         if (y1 < y2) {

   102             this.y = y1;

   103             this.y2 = y2;

   104         } else {

   105             this.y = y2;

   106             this.y2 = y1;

   107         }

   108     }

   109 

   110     public void translate(int x, int y) {

   111         if (this.x != Integer.MAX_VALUE) {

   112             this.x += x;

   113             this.x2 += x;

   114             this.y += y;

   115             this.y2 += y;

   116         }

   117     }

   118 

   119     public String toString() {

   120         return this.getClass().getName() +

   121                 "(x: " + x + ", y:" + y + ", x2:" + x2 + ", y2:" + y2 + ")";

   122     }

   123 

   124     public DirtyRegion cloneRegion() {

   125         try {

   126             return (DirtyRegion) clone();

   127         } catch (CloneNotSupportedException ex) {

   128             ex.printStackTrace();

   129         }

   130 

   131         return null;

   132     }

   133 }