001: /*
002: * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
003: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004: *
005: * This code is free software; you can redistribute it and/or modify it
006: * under the terms of the GNU General Public License version 2 only, as
007: * published by the Free Software Foundation. Sun designates this
008: * particular file as subject to the "Classpath" exception as provided
009: * by Sun in the LICENSE file that accompanied this code.
010: *
011: * This code is distributed in the hope that it will be useful, but WITHOUT
012: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014: * version 2 for more details (a copy is included in the LICENSE file that
015: * accompanied this code).
016: *
017: * You should have received a copy of the GNU General Public License version
018: * 2 along with this work; if not, write to the Free Software Foundation,
019: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020: *
021: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022: * CA 95054 USA or visit www.sun.com if you need additional information or
023: * have any questions.
024: */
025:
026: package java.awt;
027:
028: import java.awt.geom.Rectangle2D;
029: import java.awt.geom.AffineTransform;
030: import java.awt.image.BufferedImage;
031: import java.awt.image.ColorModel;
032:
033: /**
034: * The <code>TexturePaint</code> class provides a way to fill a
035: * {@link Shape} with a texture that is specified as
036: * a {@link BufferedImage}. The size of the <code>BufferedImage</code>
037: * object should be small because the <code>BufferedImage</code> data
038: * is copied by the <code>TexturePaint</code> object.
039: * At construction time, the texture is anchored to the upper
040: * left corner of a {@link Rectangle2D} that is
041: * specified in user space. Texture is computed for
042: * locations in the device space by conceptually replicating the
043: * specified <code>Rectangle2D</code> infinitely in all directions
044: * in user space and mapping the <code>BufferedImage</code> to each
045: * replicated <code>Rectangle2D</code>.
046: * @see Paint
047: * @see Graphics2D#setPaint
048: * @version 1.48, 06/05/07
049: */
050:
051: public class TexturePaint implements Paint {
052:
053: BufferedImage bufImg;
054: double tx;
055: double ty;
056: double sx;
057: double sy;
058:
059: /**
060: * Constructs a <code>TexturePaint</code> object.
061: * @param txtr the <code>BufferedImage</code> object with the texture
062: * used for painting
063: * @param anchor the <code>Rectangle2D</code> in user space used to
064: * anchor and replicate the texture
065: */
066: public TexturePaint(BufferedImage txtr, Rectangle2D anchor) {
067: this .bufImg = txtr;
068: this .tx = anchor.getX();
069: this .ty = anchor.getY();
070: this .sx = anchor.getWidth() / bufImg.getWidth();
071: this .sy = anchor.getHeight() / bufImg.getHeight();
072: }
073:
074: /**
075: * Returns the <code>BufferedImage</code> texture used to
076: * fill the shapes.
077: * @return a <code>BufferedImage</code>.
078: */
079: public BufferedImage getImage() {
080: return bufImg;
081: }
082:
083: /**
084: * Returns a copy of the anchor rectangle which positions and
085: * sizes the textured image.
086: * @return the <code>Rectangle2D</code> used to anchor and
087: * size this <code>TexturePaint</code>.
088: */
089: public Rectangle2D getAnchorRect() {
090: return new Rectangle2D.Double(tx, ty, sx * bufImg.getWidth(),
091: sy * bufImg.getHeight());
092: }
093:
094: /**
095: * Creates and returns a context used to generate the color pattern.
096: * @param cm the {@link ColorModel} that receives the
097: * <code>Paint</code> data. This is used only as a hint.
098: * @param deviceBounds the device space bounding box of the graphics
099: * primitive being rendered
100: * @param userBounds the user space bounding box of the graphics
101: * primitive being rendered
102: * @param xform the {@link AffineTransform} from user space
103: * into device space
104: * @param hints a {@link RenderingHints} object that can be used to
105: * specify how the pattern is ultimately rendered
106: * @return the {@link PaintContext} used for generating color
107: * patterns.
108: * @see PaintContext
109: */
110: public PaintContext createContext(ColorModel cm,
111: Rectangle deviceBounds, Rectangle2D userBounds,
112: AffineTransform xform, RenderingHints hints) {
113: if (xform == null) {
114: xform = new AffineTransform();
115: } else {
116: xform = (AffineTransform) xform.clone();
117: }
118: xform.translate(tx, ty);
119: xform.scale(sx, sy);
120:
121: return TexturePaintContext.getContext(bufImg, xform, hints,
122: deviceBounds);
123: }
124:
125: /**
126: * Returns the transparency mode for this <code>TexturePaint</code>.
127: * @return the transparency mode for this <code>TexturePaint</code>
128: * as an integer value.
129: * @see Transparency
130: */
131: public int getTransparency() {
132: return (bufImg.getColorModel()).getTransparency();
133: }
134:
135: }
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