1 /*
2 *
3 * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * - Neither the name of Oracle nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
21 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32 package java2d.demos.Colors;
33
34
35 import static java.awt.Color.black;
36 import static java.awt.Color.blue;
37 import static java.awt.Color.cyan;
38 import static java.awt.Color.green;
39 import static java.awt.Color.magenta;
40 import static java.awt.Color.orange;
41 import static java.awt.Color.pink;
42 import static java.awt.Color.red;
43 import static java.awt.Color.white;
44 import static java.awt.Color.yellow;
45 import java.awt.Color;
46 import java.awt.Font;
47 import java.awt.Graphics2D;
48 import java.awt.Image;
49 import java.awt.RenderingHints;
50 import java.awt.Shape;
51 import java.awt.color.ColorSpace;
52 import java.awt.font.FontRenderContext;
53 import java.awt.font.TextLayout;
54 import java.awt.geom.Rectangle2D;
55 import java.awt.image.BufferedImage;
56 import java.awt.image.ColorConvertOp;
57 import java2d.Surface;
58
59
60 /**
61 * ColorConvertOp a ColorSpace.TYPE_RGB BufferedImage to a ColorSpace.CS_GRAY
62 * BufferedImage.
63 */
64 @SuppressWarnings("serial")
65 public class ColorConvert extends Surface {
66
67 private static Image img;
68 private static Color[] colors = { red, pink, orange,
69 yellow, green, magenta, cyan, blue };
70
71 public ColorConvert() {
72 setBackground(white);
73 img = getImage("clouds.jpg");
74 }
75
76 @Override
77 public void render(int w, int h, Graphics2D g2) {
78
79 int iw = img.getWidth(this);
80 int ih = img.getHeight(this);
81 FontRenderContext frc = g2.getFontRenderContext();
82 Font font = g2.getFont();
83 g2.setColor(black);
84 TextLayout tl = new TextLayout("ColorConvertOp RGB->GRAY", font, frc);
85 tl.draw(g2, (float) (w / 2 - tl.getBounds().getWidth() / 2),
86 tl.getAscent() + tl.getLeading());
87
88 BufferedImage srcImg =
89 new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
90 Graphics2D srcG = srcImg.createGraphics();
91 RenderingHints rhs = g2.getRenderingHints();
92 srcG.setRenderingHints(rhs);
93 srcG.drawImage(img, 0, 0, null);
94
95 String s = "OpenJDK";
96 Font f = new Font(Font.SERIF, Font.BOLD, iw / 6);
97 tl = new TextLayout(s, f, frc);
98 Rectangle2D tlb = tl.getBounds();
99 char[] chars = s.toCharArray();
100 float charWidth = 0.0f;
101 int rw = iw / chars.length;
102 int rh = ih / chars.length;
103 for (int i = 0; i < chars.length; i++) {
104 tl = new TextLayout(String.valueOf(chars[i]), f, frc);
105 Shape shape = tl.getOutline(null);
106 srcG.setColor(colors[i % colors.length]);
107 tl.draw(srcG, (float) (iw / 2 - tlb.getWidth() / 2 + charWidth),
108 (float) (ih / 2 + tlb.getHeight() / 2));
109 charWidth += (float) shape.getBounds().getWidth();
110 srcG.fillRect(i * rw, ih - rh, rw, rh);
111 srcG.setColor(colors[colors.length - 1 - i % colors.length]);
112 srcG.fillRect(i * rw, 0, rw, rh);
113 }
114
115 ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
116 ColorConvertOp theOp = new ColorConvertOp(cs, rhs);
117
118 BufferedImage dstImg =
119 new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
120 theOp.filter(srcImg, dstImg);
121
122 g2.drawImage(srcImg, 10, 20, w / 2 - 20, h - 30, null);
123 g2.drawImage(dstImg, w / 2 + 10, 20, w / 2 - 20, h - 30, null);
124 }
125
126 public static void main(String[] s) {
127 createDemoFrame(new ColorConvert());
128 }
129 }