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40
41 package java2d.demos.Colors;
42
43 import java.awt.*;
44 import java.awt.geom.Rectangle2D  ;
45 import java.awt.color.ColorSpace ;
46 import java.awt.image.BufferedImage ;
47 import java.awt.image.ColorConvertOp ;
48 import java.awt.font.TextLayout ;
49 import java.awt.font.FontRenderContext ;
50 import java2d.Surface;
51
52 import static java.awt.Color .*;
53
54
55
59 public class ColorConvert extends Surface {
60
61 private static Image img;
62 private static Color colors[] = { red, pink, orange,
63 yellow, green, magenta, cyan, blue};
64
65
66 public ColorConvert() {
67 setBackground(white);
68 img = getImage("clouds.jpg");
69 }
70
71
72 public void render(int w, int h, Graphics2D g2) {
73
74 int iw = img.getWidth(this);
75 int ih = img.getHeight(this);
76 FontRenderContext frc = g2.getFontRenderContext();
77 Font font = g2.getFont();
78 g2.setColor(black);
79 TextLayout tl = new TextLayout ("ColorConvertOp RGB->GRAY", font, frc);
80 tl.draw(g2, (float) (w/2-tl.getBounds().getWidth()/2),
81 tl.getAscent()+tl.getLeading());
82
83 BufferedImage srcImg =
84 new BufferedImage (iw, ih, BufferedImage.TYPE_INT_RGB);
85 Graphics2D srcG = srcImg.createGraphics();
86 RenderingHints rhs = g2.getRenderingHints();
87 srcG.setRenderingHints(rhs);
88 srcG.drawImage(img, 0, 0, null);
89
90 String s = "JavaColor";
91 Font f = new Font("serif", Font.BOLD, iw/6);
92 tl = new TextLayout (s, f, frc);
93 Rectangle2D tlb = tl.getBounds();
94 char[] chars = s.toCharArray();
95 float charWidth = 0.0f;
96 int rw = iw/chars.length;
97 int rh = ih/chars.length;
98 for (int i = 0; i < chars.length; i++) {
99 tl = new TextLayout (String.valueOf(chars[i]), f, frc);
100 Shape shape = tl.getOutline(null);
101 srcG.setColor(colors[i%colors.length]);
102 tl.draw(srcG, (float) (iw/2-tlb.getWidth()/2+charWidth),
103 (float) (ih/2+tlb.getHeight()/2));
104 charWidth += (float) shape.getBounds().getWidth();
105 srcG.fillRect(i*rw, ih-rh, rw, rh);
106 srcG.setColor(colors[colors.length-1-i%colors.length]);
107 srcG.fillRect(i*rw, 0, rw, rh);
108 }
109
110 ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
111 ColorConvertOp theOp = new ColorConvertOp (cs, rhs);
112
113 BufferedImage dstImg =
114 new BufferedImage (iw, ih, BufferedImage.TYPE_INT_RGB);
115 theOp.filter(srcImg, dstImg);
116
117 g2.drawImage(srcImg, 10, 20, w/2-20, h-30, null);
118 g2.drawImage(dstImg, w/2+10, 20, w/2-20, h-30, null);
119 }
120
121
122 public static void main(String s[]) {
123 createDemoFrame(new ColorConvert());
124 }
125 }
126 |
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