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40
41 package java2d.demos.Composite;
42
43 import java.awt.*;
44 import java.awt.geom.GeneralPath  ;
45 import java.awt.image.BufferedImage ;
46 import java.awt.font.TextLayout ;
47 import java.awt.font.FontRenderContext ;
48 import java.awt.font.LineMetrics ;
49 import java2d.AnimatingSurface;
50
51 import static java.awt.AlphaComposite .*;
52
53
54
57 public class ACrules extends AnimatingSurface {
58
59 private static String compNames[] = {
60 "Src",
61 "SrcOver",
62 "SrcIn",
63 "SrcOut",
64 "SrcAtop",
65 "Clear",
66
67 "Dst",
68 "DstOver",
69 "DstIn",
70 "DstOut",
71 "DstAtop",
72 "Xor",
73 };
74
75 private static AlphaComposite compObjs[] = {
76 Src, SrcOver, SrcIn, SrcOut, SrcAtop, Clear,
77 Dst, DstOver, DstIn, DstOut, DstAtop, Xor,
78 };
79
80 private static int NUM_RULES = compObjs.length;
81 private static int HALF_NUM_RULES = NUM_RULES / 2;
82
83 private int fadeIndex;
84 private static float fadeValues[][] = {
85 { 1.0f,-0.1f, 0.0f, 1.0f, 0.0f, 1.0f},
86 { 0.0f, 0.1f, 1.0f, 1.0f,-0.1f, 0.0f},
87 { 1.0f, 0.0f, 1.0f, 0.0f, 0.1f, 1.0f},
88 };
89 private static String fadeNames[] = {
90 "Src => transparent, Dest opaque",
91 "Src => opaque, Dest => transparent",
92 "Src opaque, Dest => opaque",
93 };
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 PADDEDWIDTH, 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
110 public ACrules() {
111 setBackground(Color.white);
112 }
113
114
115 public void reset(int w, int h) {
116 setSleepAmount(400);
117 FontRenderContext frc = new FontRenderContext (null, false, false);
118 lm = f.getLineMetrics(compNames[0], frc);
119
120 PADLEFT = (w < 150) ? 10 : 15;
121 PADRIGHT = (w < 150) ? 10 : 15;
122 HPAD = (PADLEFT + PADRIGHT);
123 PADBELOW = (h < 250) ? 1 : 2;
124 PADABOVE = PADBELOW + (int) lm.getHeight();
125 VPAD = (PADABOVE + PADBELOW);
126 RECTWIDTH = w/4 - HPAD;
127 RECTWIDTH = (RECTWIDTH < 6) ? 6 : RECTWIDTH;
128 RECTHEIGHT = (h-VPAD)/HALF_NUM_RULES - VPAD;
129 RECTHEIGHT = (RECTHEIGHT < 6) ? 6 : RECTHEIGHT;
130 PADDEDWIDTH = (RECTWIDTH + HPAD);
131 PADDEDHEIGHT = (RECTHEIGHT + VPAD);
132
133 srcpath.reset();
134 srcpath.moveTo(0,0);
135 srcpath.lineTo(RECTWIDTH,0);
136 srcpath.lineTo(0,RECTHEIGHT);
137 srcpath.closePath();
138
139 dstpath.reset();
140 dstpath.moveTo(0,0);
141 dstpath.lineTo(RECTWIDTH,RECTHEIGHT);
142 dstpath.lineTo(RECTWIDTH,0);
143 dstpath.closePath();
144
145 dBI = new BufferedImage (RECTWIDTH, RECTHEIGHT,
146 BufferedImage.TYPE_INT_ARGB);
147 sBI = new BufferedImage (RECTWIDTH, RECTHEIGHT,
148 BufferedImage.TYPE_INT_ARGB);
149 gradientDst = new GradientPaint(0, 0,
150 new Color(1.0f, 0.0f, 0.0f, 1.0f),
151 0, RECTHEIGHT,
152 new Color(1.0f, 0.0f, 0.0f, 0.0f));
153 gradientSrc = new GradientPaint(0, 0,
154 new Color(0.0f, 0.0f, 1.0f, 1.0f),
155 RECTWIDTH, 0,
156 new Color(0.0f, 0.0f, 1.0f, 0.0f));
157 statBI = new BufferedImage (w/2, h, BufferedImage.TYPE_INT_RGB);
158 statBI = drawCompBI(statBI, true);
159 animBI = new BufferedImage (w/2, h, BufferedImage.TYPE_INT_RGB);
160 }
161
162
163 public void step(int w, int h) {
164 if (getSleepAmount() == 5000) {
165 setSleepAmount(200);
166 }
167
168 srca = srca + fadeValues[fadeIndex][1];
169 dsta = dsta + fadeValues[fadeIndex][4];
170 fadeLabel = fadeNames[fadeIndex];
171 if (srca < 0 || srca > 1.0 || dsta < 0 || dsta > 1.0) {
172 setSleepAmount(5000);
173 srca = fadeValues[fadeIndex][2];
174 dsta = fadeValues[fadeIndex][5];
175 if (fadeIndex++ == fadeValues.length-1) {
176 fadeIndex = 0;
177 }
178 }
179 }
180
181
182 public void render(int w, int h, Graphics2D g2) {
183
184 if (statBI == null || animBI == null) {
185 return;
186 }
187 g2.drawImage(statBI, 0, 0, null);
188 g2.drawImage(drawCompBI(animBI, false), w/2, 0, null);
189
190 g2.setColor(Color.black);
191 FontRenderContext frc = g2.getFontRenderContext();
192 TextLayout tl = new TextLayout ("AC Rules", g2.getFont(), frc);
193 tl.draw(g2, 15.0f, (float) tl.getBounds().getHeight()+3.0f);
194
195 tl = new TextLayout (fadeLabel, f, frc);
196 float x = (float) (w*0.75-tl.getBounds().getWidth()/2);
197 if ((x + tl.getBounds().getWidth()) > w) {
198 x = (float) (w - tl.getBounds().getWidth());
199 }
200 tl.draw(g2, x, (float) tl.getBounds().getHeight()+3.0f);
201 }
202
203
204 private BufferedImage drawCompBI(BufferedImage bi, boolean doGradient)
205 {
206 Graphics2D big = bi.createGraphics();
207 big.setColor(getBackground());
208 big.fillRect(0, 0, bi.getWidth(), bi.getHeight());
209 big.setRenderingHint(RenderingHints.KEY_ANTIALIASING, AntiAlias);
210 big.setFont(f);
211
212 Graphics2D gD = dBI.createGraphics();
213 gD.setRenderingHint(RenderingHints.KEY_ANTIALIASING, AntiAlias);
214 Graphics2D gS = sBI.createGraphics();
215 gS.setRenderingHint(RenderingHints.KEY_ANTIALIASING, AntiAlias);
216
217 int x = 0, y = 0;
218 int yy = (int) lm.getHeight() + VPAD;
219
220 for (int i = 0; i < compNames.length; i++) {
221 y = (i == 0 || i == HALF_NUM_RULES) ? yy : y + PADDEDHEIGHT;
222 x = (i >= HALF_NUM_RULES) ? bi.getWidth()/2+PADLEFT : PADLEFT;
223 big.translate(x, y);
224
225 gD.setComposite(Clear);
226 gD.fillRect(0, 0, RECTWIDTH, RECTHEIGHT);
227 gD.setComposite(Src);
228 if (doGradient) {
229 gD.setPaint(gradientDst);
230 gD.fillRect(0, 0, RECTWIDTH, RECTHEIGHT);
231 } else {
232 gD.setPaint(new Color(1.0f, 0.0f, 0.0f, dsta));
233 gD.fill(dstpath);
234 }
235
236 gS.setComposite(Clear);
237 gS.fillRect(0, 0, RECTWIDTH, RECTHEIGHT);
238 gS.setComposite(Src);
239 if (doGradient) {
240 gS.setPaint(gradientSrc);
241 gS.fillRect(0, 0, RECTWIDTH, RECTHEIGHT);
242 } else {
243 gS.setPaint(new Color(0.0f, 0.0f, 1.0f, srca));
244 gS.fill(srcpath);
245 }
246
247 gD.setComposite(compObjs[i]);
248 gD.drawImage(sBI, 0, 0, null);
249
250 big.drawImage(dBI, 0, 0, null);
251 big.setColor(Color.black);
252 big.drawString(compNames[i], 0, -lm.getDescent());
253 big.drawRect(0, 0, RECTWIDTH, RECTHEIGHT);
254 big.translate(-x, -y);
255 }
256
257 gD.dispose();
258 gS.dispose();
259 big.dispose();
260
261 return bi;
262 }
263
264
265 public static void main(String argv[]) {
266 createDemoFrame(new ACrules());
267 }
268 }
269 |
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