1 /*
2 *
3 * Copyright (c) 2007, 2011, 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.Composite;
33
34
35 import static java.awt.AlphaComposite.Clear;
36 import static java.awt.AlphaComposite.Dst;
37 import static java.awt.AlphaComposite.DstAtop;
38 import static java.awt.AlphaComposite.DstIn;
39 import static java.awt.AlphaComposite.DstOut;
40 import static java.awt.AlphaComposite.DstOver;
41 import static java.awt.AlphaComposite.Src;
42 import static java.awt.AlphaComposite.SrcAtop;
43 import static java.awt.AlphaComposite.SrcIn;
44 import static java.awt.AlphaComposite.SrcOut;
45 import static java.awt.AlphaComposite.SrcOver;
46 import static java.awt.AlphaComposite.Xor;
47 import java.awt.AlphaComposite;
48 import java.awt.Color;
49 import java.awt.Font;
50 import java.awt.GradientPaint;
51 import java.awt.Graphics2D;
52 import java.awt.RenderingHints;
53 import java.awt.font.FontRenderContext;
54 import java.awt.font.LineMetrics;
55 import java.awt.font.TextLayout;
56 import java.awt.geom.GeneralPath;
57 import java.awt.image.BufferedImage;
58 import java2d.AnimatingSurface;
59
60
61 /**
62 * All the AlphaCompositing Rules demonstrated.
63 */
64 @SuppressWarnings("serial")
65 public class ACrules extends AnimatingSurface {
66
67 private static String compNames[] = {
68 "Src",
69 "SrcOver",
70 "SrcIn",
71 "SrcOut",
72 "SrcAtop",
73 "Clear",
74 "Dst",
75 "DstOver",
76 "DstIn",
77 "DstOut",
78 "DstAtop",
79 "Xor", };
80 private static final AlphaComposite compObjs[] = {
81 Src, SrcOver, SrcIn, SrcOut, SrcAtop, Clear,
82 Dst, DstOver, DstIn, DstOut, DstAtop, Xor, };
83 private static final int NUM_RULES = compObjs.length;
84 private static final int HALF_NUM_RULES = NUM_RULES / 2;
85 private int fadeIndex;
86 private static float fadeValues[][] = {
87 { 1.0f, -0.1f, 0.0f, 1.0f, 0.0f, 1.0f },
88 { 0.0f, 0.1f, 1.0f, 1.0f, -0.1f, 0.0f },
89 { 1.0f, 0.0f, 1.0f, 0.0f, 0.1f, 1.0f }, };
90 private static String fadeNames[] = {
91 "Src => transparent, Dest opaque",
92 "Src => opaque, Dest => transparent",
93 "Src opaque, Dest => opaque", };
94 private static Font f = new Font("serif", Font.PLAIN, 10);
95 private float srca = fadeValues[fadeIndex][0];
96 private float dsta = fadeValues[fadeIndex][3];
97 private String fadeLabel = fadeNames[0];
98 private BufferedImage statBI, animBI;
99 private int PADLEFT, PADRIGHT, HPAD;
100 private int PADABOVE, PADBELOW, VPAD;
101 private int RECTWIDTH, RECTHEIGHT;
102 private int PADDEDHEIGHT;
103 private GeneralPath srcpath = new GeneralPath();
104 private GeneralPath dstpath = new GeneralPath();
105 private LineMetrics lm;
106 private BufferedImage dBI, sBI;
107 private GradientPaint gradientDst, gradientSrc;
108
109 public ACrules() {
110 setBackground(Color.white);
111 }
112
113 @Override
114 public void reset(int w, int h) {
115 setSleepAmount(400);
116 FontRenderContext frc = new FontRenderContext(null, false, false);
117 lm = f.getLineMetrics(compNames[0], frc);
118
119 PADLEFT = (w < 150) ? 10 : 15;
120 PADRIGHT = (w < 150) ? 10 : 15;
121 HPAD = (PADLEFT + PADRIGHT);
122 PADBELOW = (h < 250) ? 1 : 2;
123 PADABOVE = PADBELOW + (int) lm.getHeight();
124 VPAD = (PADABOVE + PADBELOW);
125 RECTWIDTH = w / 4 - HPAD;
126 RECTWIDTH = (RECTWIDTH < 6) ? 6 : RECTWIDTH;
127 RECTHEIGHT = (h - VPAD) / HALF_NUM_RULES - VPAD;
128 RECTHEIGHT = (RECTHEIGHT < 6) ? 6 : RECTHEIGHT;
129 PADDEDHEIGHT = (RECTHEIGHT + VPAD);
130
131 srcpath.reset();
132 srcpath.moveTo(0, 0);
133 srcpath.lineTo(RECTWIDTH, 0);
134 srcpath.lineTo(0, RECTHEIGHT);
135 srcpath.closePath();
136
137 dstpath.reset();
138 dstpath.moveTo(0, 0);
139 dstpath.lineTo(RECTWIDTH, RECTHEIGHT);
140 dstpath.lineTo(RECTWIDTH, 0);
141 dstpath.closePath();
142
143 dBI = new BufferedImage(RECTWIDTH, RECTHEIGHT,
144 BufferedImage.TYPE_INT_ARGB);
145 sBI = new BufferedImage(RECTWIDTH, RECTHEIGHT,
146 BufferedImage.TYPE_INT_ARGB);
147 gradientDst = new GradientPaint(0, 0,
148 new Color(1.0f, 0.0f, 0.0f, 1.0f),
149 0, RECTHEIGHT,
150 new Color(1.0f, 0.0f, 0.0f, 0.0f));
151 gradientSrc = new GradientPaint(0, 0,
152 new Color(0.0f, 0.0f, 1.0f, 1.0f),
153 RECTWIDTH, 0,
154 new Color(0.0f, 0.0f, 1.0f, 0.0f));
155 statBI = new BufferedImage(w / 2, h, BufferedImage.TYPE_INT_RGB);
156 statBI = drawCompBI(statBI, true);
157 animBI = new BufferedImage(w / 2, h, BufferedImage.TYPE_INT_RGB);
158 }
159
160 @Override
161 public void step(int w, int h) {
162 if (getSleepAmount() == 5000) {
163 setSleepAmount(200);
164 }
165
166 srca = srca + fadeValues[fadeIndex][1];
167 dsta = dsta + fadeValues[fadeIndex][4];
168 fadeLabel = fadeNames[fadeIndex];
169 if (srca < 0 || srca > 1.0 || dsta < 0 || dsta > 1.0) {
170 setSleepAmount(5000);
171 srca = fadeValues[fadeIndex][2];
172 dsta = fadeValues[fadeIndex][5];
173 if (fadeIndex++ == fadeValues.length - 1) {
174 fadeIndex = 0;
175 }
176 }
177 }
178
179 @Override
180 public void render(int w, int h, Graphics2D g2) {
181
182 if (statBI == null || animBI == null) {
183 return;
184 }
185 g2.drawImage(statBI, 0, 0, null);
186 g2.drawImage(drawCompBI(animBI, false), w / 2, 0, null);
187
188 g2.setColor(Color.black);
189 FontRenderContext frc = g2.getFontRenderContext();
190 TextLayout tl = new TextLayout("AC Rules", g2.getFont(), frc);
191 tl.draw(g2, 15.0f, (float) tl.getBounds().getHeight() + 3.0f);
192
193 tl = new TextLayout(fadeLabel, f, frc);
194 float x = (float) (w * 0.75 - tl.getBounds().getWidth() / 2);
195 if ((x + tl.getBounds().getWidth()) > w) {
196 x = (float) (w - tl.getBounds().getWidth());
197 }
198 tl.draw(g2, x, (float) tl.getBounds().getHeight() + 3.0f);
199 }
200
201 private BufferedImage drawCompBI(BufferedImage bi, boolean doGradient) {
202 Graphics2D big = bi.createGraphics();
203 big.setColor(getBackground());
204 big.fillRect(0, 0, bi.getWidth(), bi.getHeight());
205 big.setRenderingHint(RenderingHints.KEY_ANTIALIASING, AntiAlias);
206 big.setFont(f);
207
208 Graphics2D gD = dBI.createGraphics();
209 gD.setRenderingHint(RenderingHints.KEY_ANTIALIASING, AntiAlias);
210 Graphics2D gS = sBI.createGraphics();
211 gS.setRenderingHint(RenderingHints.KEY_ANTIALIASING, AntiAlias);
212
213 int x = 0, y = 0;
214 int yy = (int) lm.getHeight() + VPAD;
215
216 for (int i = 0; i < compNames.length; i++) {
217 y = (i == 0 || i == HALF_NUM_RULES) ? yy : y + PADDEDHEIGHT;
218 x = (i >= HALF_NUM_RULES) ? bi.getWidth() / 2 + PADLEFT : PADLEFT;
219 big.translate(x, y);
220
221 gD.setComposite(Clear);
222 gD.fillRect(0, 0, RECTWIDTH, RECTHEIGHT);
223 gD.setComposite(Src);
224 if (doGradient) {
225 gD.setPaint(gradientDst);
226 gD.fillRect(0, 0, RECTWIDTH, RECTHEIGHT);
227 } else {
228 gD.setPaint(new Color(1.0f, 0.0f, 0.0f, dsta));
229 gD.fill(dstpath);
230 }
231
232 gS.setComposite(Clear);
233 gS.fillRect(0, 0, RECTWIDTH, RECTHEIGHT);
234 gS.setComposite(Src);
235 if (doGradient) {
236 gS.setPaint(gradientSrc);
237 gS.fillRect(0, 0, RECTWIDTH, RECTHEIGHT);
238 } else {
239 gS.setPaint(new Color(0.0f, 0.0f, 1.0f, srca));
240 gS.fill(srcpath);
241 }
242
243 gD.setComposite(compObjs[i]);
244 gD.drawImage(sBI, 0, 0, null);
245
246 big.drawImage(dBI, 0, 0, null);
247 big.setColor(Color.black);
248 big.drawString(compNames[i], 0, -lm.getDescent());
249 big.drawRect(0, 0, RECTWIDTH, RECTHEIGHT);
250 big.translate(-x, -y);
251 }
252
253 gD.dispose();
254 gS.dispose();
255 big.dispose();
256
257 return bi;
258 }
259
260 public static void main(String argv[]) {
261 createDemoFrame(new ACrules());
262 }
263 }