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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | |||
| 27 | package java.awt; | ||
| 28 | |||
| 29 | import java.awt.image.ColorModel; | ||
| 30 | |||
| 31 | import sun.awt.AWTAccessor; | ||
| 32 | import sun.awt.AppContext; | ||
| 33 | import sun.awt.SunToolkit; | ||
| 34 | |||
| 35 | /** | ||
| 36 | * The <code>GraphicsDevice</code> class describes the graphics devices | ||
| 37 | * that might be available in a particular graphics environment. These | ||
| 38 | * include screen and printer devices. Note that there can be many screens | ||
| 39 | * and many printers in an instance of {@link GraphicsEnvironment}. Each | ||
| 40 | * graphics device has one or more {@link GraphicsConfiguration} objects | ||
| 41 | * associated with it. These objects specify the different configurations | ||
| 42 | * in which the <code>GraphicsDevice</code> can be used. | ||
| 43 | * <p> | ||
| 44 | * In a multi-screen environment, the <code>GraphicsConfiguration</code> | ||
| 45 | * objects can be used to render components on multiple screens. The | ||
| 46 | * following code sample demonstrates how to create a <code>JFrame</code> | ||
| 47 | * object for each <code>GraphicsConfiguration</code> on each screen | ||
| 48 | * device in the <code>GraphicsEnvironment</code>: | ||
| 49 | * <pre> | ||
| 50 | * GraphicsEnvironment ge = GraphicsEnvironment. | ||
| 51 | * getLocalGraphicsEnvironment(); | ||
| 52 | * GraphicsDevice[] gs = ge.getScreenDevices(); | ||
| 53 | * for (int j = 0; j < gs.length; j++) { | ||
| 54 | * GraphicsDevice gd = gs[j]; | ||
| 55 | * GraphicsConfiguration[] gc = | ||
| 56 | * gd.getConfigurations(); | ||
| 57 | * for (int i=0; i < gc.length; i++) { | ||
| 58 | * JFrame f = new | ||
| 59 | * JFrame(gs[j].getDefaultConfiguration()); | ||
| 60 | * Canvas c = new Canvas(gc[i]); | ||
| 61 | * Rectangle gcBounds = gc[i].getBounds(); | ||
| 62 | * int xoffs = gcBounds.x; | ||
| 63 | * int yoffs = gcBounds.y; | ||
| 64 | * f.getContentPane().add(c); | ||
| 65 | * f.setLocation((i*50)+xoffs, (i*60)+yoffs); | ||
| 66 | * f.show(); | ||
| 67 | * } | ||
| 68 | * } | ||
| 69 | * </pre> | ||
| 70 | * <p> | ||
| 71 | * For more information on full-screen exclusive mode API, see the | ||
| 72 | * <a href="http://java.sun.com/docs/books/tutorial/extra/fullscreen/index.html"> | ||
| 73 | * Full-Screen Exclusive Mode API Tutorial</a>. | ||
| 74 | * | ||
| 75 | * @see GraphicsEnvironment | ||
| 76 | * @see GraphicsConfiguration | ||
| 77 | */ | ||
| 78 | public abstract class GraphicsDevice { | ||
| 79 | |||
| 80 | private Window fullScreenWindow; | ||
| 81 | private AppContext fullScreenAppContext; // tracks which AppContext | ||
| 82 | // created the FS window | ||
| 83 | // this lock is used for making synchronous changes to the AppContext's | ||
| 84 | // current full screen window | ||
| 85 | private final Object fsAppContextLock = new Object(); | ||
| 86 | |||
| 87 | private Rectangle windowedModeBounds; | ||
| 88 | |||
| 89 | /** | ||
| 90 | * This is an abstract class that cannot be instantiated directly. | ||
| 91 | * Instances must be obtained from a suitable factory or query method. | ||
| 92 | * @see GraphicsEnvironment#getScreenDevices | ||
| 93 | * @see GraphicsEnvironment#getDefaultScreenDevice | ||
| 94 | * @see GraphicsConfiguration#getDevice | ||
| 95 | */ | ||
| 96 | protected GraphicsDevice() { | ||
| 97 | } | ||
| 98 | |||
| 99 | /** | ||
| 100 | * Device is a raster screen. | ||
| 101 | */ | ||
| 102 | public final static int TYPE_RASTER_SCREEN = 0; | ||
| 103 | |||
| 104 | /** | ||
| 105 | * Device is a printer. | ||
| 106 | */ | ||
| 107 | public final static int TYPE_PRINTER = 1; | ||
| 108 | |||
| 109 | /** | ||
| 110 | * Device is an image buffer. This buffer can reside in device | ||
| 111 | * or system memory but it is not physically viewable by the user. | ||
| 112 | */ | ||
| 113 | public final static int TYPE_IMAGE_BUFFER = 2; | ||
| 114 | |||
| 115 | /** | ||
| 116 | * Kinds of translucency supported by the underlying system. | ||
| 117 | * | ||
| 118 | * @see #isWindowTranslucencySupported | ||
| 119 | * | ||
| 120 | * @since 1.7 | ||
| 121 | */ | ||
| 122 | public static enum WindowTranslucency { | ||
| 123 | /** | ||
| 124 | * Represents support in the underlying system for windows each pixel | ||
| 125 | * of which is guaranteed to be either completely opaque, with | ||
| 126 | * an alpha value of 1.0, or completely transparent, with an alpha | ||
| 127 | * value of 0.0. | ||
| 128 | */ | ||
| 129 | PERPIXEL_TRANSPARENT, | ||
| 130 | /** | ||
| 131 | * Represents support in the underlying system for windows all of | ||
| 132 | * the pixels of which have the same alpha value between or including | ||
| 133 | * 0.0 and 1.0. | ||
| 134 | */ | ||
| 135 | TRANSLUCENT, | ||
| 136 | /** | ||
| 137 | * Represents support in the underlying system for windows that | ||
| 138 | * contain or might contain pixels with arbitrary alpha values | ||
| 139 | * between and including 0.0 and 1.0. | ||
| 140 | */ | ||
| 141 | PERPIXEL_TRANSLUCENT; | ||
| 142 | } | ||
| 143 | |||
| 144 | /** | ||
| 145 | * Returns the type of this <code>GraphicsDevice</code>. | ||
| 146 | * @return the type of this <code>GraphicsDevice</code>, which can | ||
| 147 | * either be TYPE_RASTER_SCREEN, TYPE_PRINTER or TYPE_IMAGE_BUFFER. | ||
| 148 | * @see #TYPE_RASTER_SCREEN | ||
| 149 | * @see #TYPE_PRINTER | ||
| 150 | * @see #TYPE_IMAGE_BUFFER | ||
| 151 | */ | ||
| 152 | public abstract int getType(); | ||
| 153 | |||
| 154 | /** | ||
| 155 | * Returns the identification string associated with this | ||
| 156 | * <code>GraphicsDevice</code>. | ||
| 157 | * <p> | ||
| 158 | * A particular program might use more than one | ||
| 159 | * <code>GraphicsDevice</code> in a <code>GraphicsEnvironment</code>. | ||
| 160 | * This method returns a <code>String</code> identifying a | ||
| 161 | * particular <code>GraphicsDevice</code> in the local | ||
| 162 | * <code>GraphicsEnvironment</code>. Although there is | ||
| 163 | * no public method to set this <code>String</code>, a programmer can | ||
| 164 | * use the <code>String</code> for debugging purposes. Vendors of | ||
| 165 | * the Java<sup><font size=-2>TM</font></sup> Runtime Environment can | ||
| 166 | * format the return value of the <code>String</code>. To determine | ||
| 167 | * how to interpret the value of the <code>String</code>, contact the | ||
| 168 | * vendor of your Java Runtime. To find out who the vendor is, from | ||
| 169 | * your program, call the | ||
| 170 | * {@link System#getProperty(String) getProperty} method of the | ||
| 171 | * System class with "java.vendor". | ||
| 172 | * @return a <code>String</code> that is the identification | ||
| 173 | * of this <code>GraphicsDevice</code>. | ||
| 174 | */ | ||
| 175 | public abstract String getIDstring(); | ||
| 176 | |||
| 177 | /** | ||
| 178 | * Returns all of the <code>GraphicsConfiguration</code> | ||
| 179 | * objects associated with this <code>GraphicsDevice</code>. | ||
| 180 | * @return an array of <code>GraphicsConfiguration</code> | ||
| 181 | * objects that are associated with this | ||
| 182 | * <code>GraphicsDevice</code>. | ||
| 183 | */ | ||
| 184 | public abstract GraphicsConfiguration[] getConfigurations(); | ||
| 185 | |||
| 186 | /** | ||
| 187 | * Returns the default <code>GraphicsConfiguration</code> | ||
| 188 | * associated with this <code>GraphicsDevice</code>. | ||
| 189 | * @return the default <code>GraphicsConfiguration</code> | ||
| 190 | * of this <code>GraphicsDevice</code>. | ||
| 191 | */ | ||
| 192 | public abstract GraphicsConfiguration getDefaultConfiguration(); | ||
| 193 | |||
| 194 | /** | ||
| 195 | * Returns the "best" configuration possible that passes the | ||
| 196 | * criteria defined in the {@link GraphicsConfigTemplate}. | ||
| 197 | * @param gct the <code>GraphicsConfigTemplate</code> object | ||
| 198 | * used to obtain a valid <code>GraphicsConfiguration</code> | ||
| 199 | * @return a <code>GraphicsConfiguration</code> that passes | ||
| 200 | * the criteria defined in the specified | ||
| 201 | * <code>GraphicsConfigTemplate</code>. | ||
| 202 | * @see GraphicsConfigTemplate | ||
| 203 | */ | ||
| 204 | public GraphicsConfiguration | ||
| 205 | getBestConfiguration(GraphicsConfigTemplate gct) { | ||
| 206 | GraphicsConfiguration[] configs = getConfigurations(); | ||
| 207 | return gct.getBestConfiguration(configs); | ||
| 208 | } | ||
| 209 | |||
| 210 | /** | ||
| 211 | * Returns <code>true</code> if this <code>GraphicsDevice</code> | ||
| 212 | * supports full-screen exclusive mode. | ||
| 213 | * If a SecurityManager is installed, its | ||
| 214 | * <code>checkPermission</code> method will be called | ||
| 215 | * with <code>AWTPermission("fullScreenExclusive")</code>. | ||
| 216 | * <code>isFullScreenSupported</code> returns true only if | ||
| 217 | * that permission is granted. | ||
| 218 | * @return whether full-screen exclusive mode is available for | ||
| 219 | * this graphics device | ||
| 220 | * @see java.awt.AWTPermission | ||
| 221 | * @since 1.4 | ||
| 222 | */ | ||
| 223 | public boolean isFullScreenSupported() { | ||
| 224 | return false; | ||
| 225 | } | ||
| 226 | |||
| 227 | /** | ||
| 228 | * Enter full-screen mode, or return to windowed mode. The entered | ||
| 229 | * full-screen mode may be either exclusive or simulated. Exclusive | ||
| 230 | * mode is only available if <code>isFullScreenSupported</code> | ||
| 231 | * returns <code>true</code>. | ||
| 232 | * <p> | ||
| 233 | * Exclusive mode implies: | ||
| 234 | * <ul> | ||
| 235 | * <li>Windows cannot overlap the full-screen window. All other application | ||
| 236 | * windows will always appear beneath the full-screen window in the Z-order. | ||
| 237 | * <li>There can be only one full-screen window on a device at any time, | ||
| 238 | * so calling this method while there is an existing full-screen Window | ||
| 239 | * will cause the existing full-screen window to | ||
| 240 | * return to windowed mode. | ||
| 241 | * <li>Input method windows are disabled. It is advisable to call | ||
| 242 | * <code>Component.enableInputMethods(false)</code> to make a component | ||
| 243 | * a non-client of the input method framework. | ||
| 244 | * </ul> | ||
| 245 | * <p> | ||
| 246 | * The simulated full-screen mode places and resizes the window to the maximum | ||
| 247 | * possible visible area of the screen. However, the native windowing system | ||
| 248 | * may modify the requested geometry-related data, so that the {@code Window} object | ||
| 249 | * is placed and sized in a way that corresponds closely to the desktop settings. | ||
| 250 | * <p> | ||
| 251 | * When entering full-screen mode, if the window to be used as a | ||
| 252 | * full-screen window is not visible, this method will make it visible. | ||
| 253 | * It will remain visible when returning to windowed mode. | ||
| 254 | * <p> | ||
| 255 | * When entering full-screen mode, all the translucency effects are reset for | ||
| 256 | * the window. Its shape is set to {@code null}, the opacity value is set to | ||
| 257 | * 1.0f, and the background color alpha is set to 255 (completely opaque). | ||
| 258 | * These values are not restored when returning to windowed mode. | ||
| 259 | * <p> | ||
| 260 | * It is unspecified and platform-dependent how decorated windows operate | ||
| 261 | * in full-screen mode. For this reason, it is recommended to turn off | ||
| 262 | * the decorations in a {@code Frame} or {@code Dialog} object by using the | ||
| 263 | * {@code setUndecorated} method. | ||
| 264 | * <p> | ||
| 265 | * When returning to windowed mode from an exclusive full-screen window, | ||
| 266 | * any display changes made by calling {@code setDisplayMode} are | ||
| 267 | * automatically restored to their original state. | ||
| 268 | * | ||
| 269 | * @param w a window to use as the full-screen window; {@code null} | ||
| 270 | * if returning to windowed mode. Some platforms expect the | ||
| 271 | * fullscreen window to be a top-level component (i.e., a {@code Frame}); | ||
| 272 | * therefore it is preferable to use a {@code Frame} here rather than a | ||
| 273 | * {@code Window}. | ||
| 274 | * | ||
| 275 | * @see #isFullScreenSupported | ||
| 276 | * @see #getFullScreenWindow | ||
| 277 | * @see #setDisplayMode | ||
| 278 | * @see Component#enableInputMethods | ||
| 279 | * @see Component#setVisible | ||
| 280 | * @see Frame#setUndecorated | ||
| 281 | * @see Dialog#setUndecorated | ||
| 282 | * | ||
| 283 | * @since 1.4 | ||
| 284 | */ | ||
| 285 | public void setFullScreenWindow(Window w) { | ||
| 286 | if (w != null) { | ||
| 287 | if (w.getShape() != null) { | ||
| 288 | w.setShape(null); | ||
| 289 | } | ||
| 290 | if (w.getOpacity() < 1.0f) { | ||
| 291 | w.setOpacity(1.0f); | ||
| 292 | } | ||
| 293 | if (!w.isOpaque()) { | ||
| 294 | Color bgColor = w.getBackground(); | ||
| 295 | bgColor = new Color(bgColor.getRed(), bgColor.getGreen(), | ||
| 296 | bgColor.getBlue(), 255); | ||
| 297 | w.setBackground(bgColor); | ||
| 298 | } | ||
| 299 | } | ||
| 300 | if (fullScreenWindow != null && windowedModeBounds != null) { | ||
| 301 | // if the window went into fs mode before it was realized it may | ||
| 302 | // have (0,0) dimensions | ||
| 303 | if (windowedModeBounds.width == 0) windowedModeBounds.width = 1; | ||
| 304 | if (windowedModeBounds.height == 0) windowedModeBounds.height = 1; | ||
| 305 | fullScreenWindow.setBounds(windowedModeBounds); | ||
| 306 | } | ||
| 307 | // Set the full screen window | ||
| 308 | synchronized (fsAppContextLock) { | ||
| 309 | // Associate fullscreen window with current AppContext | ||
| 310 | if (w == null) { | ||
| 311 | fullScreenAppContext = null; | ||
| 312 | } else { | ||
| 313 | fullScreenAppContext = AppContext.getAppContext(); | ||
| 314 | } | ||
| 315 | fullScreenWindow = w; | ||
| 316 | } | ||
| 317 | if (fullScreenWindow != null) { | ||
| 318 | windowedModeBounds = fullScreenWindow.getBounds(); | ||
| 319 | // Note that we use the graphics configuration of the device, | ||
| 320 | // not the window's, because we're setting the fs window for | ||
| 321 | // this device. | ||
| 322 | Rectangle screenBounds = getDefaultConfiguration().getBounds(); | ||
| 323 | fullScreenWindow.setBounds(screenBounds.x, screenBounds.y, | ||
| 324 | screenBounds.width, screenBounds.height); | ||
| 325 | fullScreenWindow.setVisible(true); | ||
| 326 | fullScreenWindow.toFront(); | ||
| 327 | } | ||
| 328 | } | ||
| 329 | |||
| 330 | /** | ||
| 331 | * Returns the <code>Window</code> object representing the | ||
| 332 | * full-screen window if the device is in full-screen mode. | ||
| 333 | * | ||
| 334 | * @return the full-screen window, or <code>null</code> if the device is | ||
| 335 | * not in full-screen mode. | ||
| 336 | * @see #setFullScreenWindow(Window) | ||
| 337 | * @since 1.4 | ||
| 338 | */ | ||
| 339 | public Window getFullScreenWindow() { | ||
| 340 | Window returnWindow = null; | ||
| 341 | synchronized (fsAppContextLock) { | ||
| 342 | // Only return a handle to the current fs window if we are in the | ||
| 343 | // same AppContext that set the fs window | ||
| 344 | if (fullScreenAppContext == AppContext.getAppContext()) { | ||
| 345 | returnWindow = fullScreenWindow; | ||
| 346 | } | ||
| 347 | } | ||
| 348 | return returnWindow; | ||
| 349 | } | ||
| 350 | |||
| 351 | /** | ||
| 352 | * Returns <code>true</code> if this <code>GraphicsDevice</code> | ||
| 353 | * supports low-level display changes. | ||
| 354 | * On some platforms low-level display changes may only be allowed in | ||
| 355 | * full-screen exclusive mode (i.e., if {@link #isFullScreenSupported()} | ||
| 356 | * returns {@code true} and the application has already entered | ||
| 357 | * full-screen mode using {@link #setFullScreenWindow}). | ||
| 358 | * @return whether low-level display changes are supported for this | ||
| 359 | * graphics device. | ||
| 360 | * @see #isFullScreenSupported | ||
| 361 | * @see #setDisplayMode | ||
| 362 | * @see #setFullScreenWindow | ||
| 363 | * @since 1.4 | ||
| 364 | */ | ||
| 365 | public boolean isDisplayChangeSupported() { | ||
| 366 | return false; | ||
| 367 | } | ||
| 368 | |||
| 369 | /** | ||
| 370 | * Sets the display mode of this graphics device. This is only allowed | ||
| 371 | * if {@link #isDisplayChangeSupported()} returns {@code true} and may | ||
| 372 | * require first entering full-screen exclusive mode using | ||
| 373 | * {@link #setFullScreenWindow} providing that full-screen exclusive mode is | ||
| 374 | * supported (i.e., {@link #isFullScreenSupported()} returns | ||
| 375 | * {@code true}). | ||
| 376 | * <p> | ||
| 377 | * | ||
| 378 | * The display mode must be one of the display modes returned by | ||
| 379 | * {@link #getDisplayModes()}, with one exception: passing a display mode | ||
| 380 | * with {@link DisplayMode#REFRESH_RATE_UNKNOWN} refresh rate will result in | ||
| 381 | * selecting a display mode from the list of available display modes with | ||
| 382 | * matching width, height and bit depth. | ||
| 383 | * However, passing a display mode with {@link DisplayMode#BIT_DEPTH_MULTI} | ||
| 384 | * for bit depth is only allowed if such mode exists in the list returned by | ||
| 385 | * {@link #getDisplayModes()}. | ||
| 386 | * <p> | ||
| 387 | * Example code: | ||
| 388 | * <pre><code> | ||
| 389 | * Frame frame; | ||
| 390 | * DisplayMode newDisplayMode; | ||
| 391 | * GraphicsDevice gd; | ||
| 392 | * // create a Frame, select desired DisplayMode from the list of modes | ||
| 393 | * // returned by gd.getDisplayModes() ... | ||
| 394 | * | ||
| 395 | * if (gd.isFullScreenSupported()) { | ||
| 396 | * gd.setFullScreenWindow(frame); | ||
| 397 | * } else { | ||
| 398 | * // proceed in non-full-screen mode | ||
| 399 | * frame.setSize(...); | ||
| 400 | * frame.setLocation(...); | ||
| 401 | * frame.setVisible(true); | ||
| 402 | * } | ||
| 403 | * | ||
| 404 | * if (gd.isDisplayChangeSupported()) { | ||
| 405 | * gd.setDisplayMode(newDisplayMode); | ||
| 406 | * } | ||
| 407 | * </code></pre> | ||
| 408 | * | ||
| 409 | * @param dm The new display mode of this graphics device. | ||
| 410 | * @exception IllegalArgumentException if the <code>DisplayMode</code> | ||
| 411 | * supplied is <code>null</code>, or is not available in the array returned | ||
| 412 | * by <code>getDisplayModes</code> | ||
| 413 | * @exception UnsupportedOperationException if | ||
| 414 | * <code>isDisplayChangeSupported</code> returns <code>false</code> | ||
| 415 | * @see #getDisplayMode | ||
| 416 | * @see #getDisplayModes | ||
| 417 | * @see #isDisplayChangeSupported | ||
| 418 | * @since 1.4 | ||
| 419 | */ | ||
| 420 | public void setDisplayMode(DisplayMode dm) { | ||
| 421 | throw new UnsupportedOperationException("Cannot change display mode"); | ||
| 422 | } | ||
| 423 | |||
| 424 | /** | ||
| 425 | * Returns the current display mode of this | ||
| 426 | * <code>GraphicsDevice</code>. | ||
| 427 | * The returned display mode is allowed to have a refresh rate | ||
| 428 | * {@link DisplayMode#REFRESH_RATE_UNKNOWN} if it is indeterminate. | ||
| 429 | * Likewise, the returned display mode is allowed to have a bit depth | ||
| 430 | * {@link DisplayMode#BIT_DEPTH_MULTI} if it is indeterminate or if multiple | ||
| 431 | * bit depths are supported. | ||
| 432 | * @return the current display mode of this graphics device. | ||
| 433 | * @see #setDisplayMode(DisplayMode) | ||
| 434 | * @since 1.4 | ||
| 435 | */ | ||
| 436 | public DisplayMode getDisplayMode() { | ||
| 437 | GraphicsConfiguration gc = getDefaultConfiguration(); | ||
| 438 | Rectangle r = gc.getBounds(); | ||
| 439 | ColorModel cm = gc.getColorModel(); | ||
| 440 | return new DisplayMode(r.width, r.height, cm.getPixelSize(), 0); | ||
| 441 | } | ||
| 442 | |||
| 443 | /** | ||
| 444 | * Returns all display modes available for this | ||
| 445 | * <code>GraphicsDevice</code>. | ||
| 446 | * The returned display modes are allowed to have a refresh rate | ||
| 447 | * {@link DisplayMode#REFRESH_RATE_UNKNOWN} if it is indeterminate. | ||
| 448 | * Likewise, the returned display modes are allowed to have a bit depth | ||
| 449 | * {@link DisplayMode#BIT_DEPTH_MULTI} if it is indeterminate or if multiple | ||
| 450 | * bit depths are supported. | ||
| 451 | * @return all of the display modes available for this graphics device. | ||
| 452 | * @since 1.4 | ||
| 453 | */ | ||
| 454 | public DisplayMode[] getDisplayModes() { | ||
| 455 | return new DisplayMode[] { getDisplayMode() }; | ||
| 456 | } | ||
| 457 | |||
| 458 | /** | ||
| 459 | * This method returns the number of bytes available in | ||
| 460 | * accelerated memory on this device. | ||
| 461 | * Some images are created or cached | ||
| 462 | * in accelerated memory on a first-come, | ||
| 463 | * first-served basis. On some operating systems, | ||
| 464 | * this memory is a finite resource. Calling this method | ||
| 465 | * and scheduling the creation and flushing of images carefully may | ||
| 466 | * enable applications to make the most efficient use of | ||
| 467 | * that finite resource. | ||
| 468 | * <br> | ||
| 469 | * Note that the number returned is a snapshot of how much | ||
| 470 | * memory is available; some images may still have problems | ||
| 471 | * being allocated into that memory. For example, depending | ||
| 472 | * on operating system, driver, memory configuration, and | ||
| 473 | * thread situations, the full extent of the size reported | ||
| 474 | * may not be available for a given image. There are further | ||
| 475 | * inquiry methods on the {@link ImageCapabilities} object | ||
| 476 | * associated with a VolatileImage that can be used to determine | ||
| 477 | * whether a particular VolatileImage has been created in accelerated | ||
| 478 | * memory. | ||
| 479 | * @return number of bytes available in accelerated memory. | ||
| 480 | * A negative return value indicates that the amount of accelerated memory | ||
| 481 | * on this GraphicsDevice is indeterminate. | ||
| 482 | * @see java.awt.image.VolatileImage#flush | ||
| 483 | * @see ImageCapabilities#isAccelerated | ||
| 484 | * @since 1.4 | ||
| 485 | */ | ||
| 486 | public int getAvailableAcceleratedMemory() { | ||
| 487 | return -1; | ||
| 488 | } | ||
| 489 | |||
| 490 | /** | ||
| 491 | * Returns whether the given level of translucency is supported by | ||
| 492 | * this graphics device. | ||
| 493 | * | ||
| 494 | * @param translucencyKind a kind of translucency support | ||
| 495 | * @return whether the given translucency kind is supported | ||
| 496 | * | ||
| 497 | * @since 1.7 | ||
| 498 | */ | ||
| 499 | public boolean isWindowTranslucencySupported(WindowTranslucency translucencyKind) { | ||
| 500 | switch (translucencyKind) { | ||
| 501 | case PERPIXEL_TRANSPARENT: | ||
| 502 | return isWindowShapingSupported(); | ||
| 503 | case TRANSLUCENT: | ||
| 504 | return isWindowOpacitySupported(); | ||
| 505 | case PERPIXEL_TRANSLUCENT: | ||
| 506 | return isWindowPerpixelTranslucencySupported(); | ||
| 507 | } | ||
| 508 | return false; | ||
| 509 | } | ||
| 510 | |||
| 511 | /** | ||
| 512 | * Returns whether the windowing system supports changing the shape | ||
| 513 | * of top-level windows. | ||
| 514 | * Note that this method may sometimes return true, but the native | ||
| 515 | * windowing system may still not support the concept of | ||
| 516 | * shaping (due to the bugs in the windowing system). | ||
| 517 | */ | ||
| 518 | static boolean isWindowShapingSupported() { | ||
| 519 | Toolkit curToolkit = Toolkit.getDefaultToolkit(); | ||
| 520 | if (!(curToolkit instanceof SunToolkit)) { | ||
| 521 | return false; | ||
| 522 | } | ||
| 523 | return ((SunToolkit)curToolkit).isWindowShapingSupported(); | ||
| 524 | } | ||
| 525 | |||
| 526 | /** | ||
| 527 | * Returns whether the windowing system supports changing the opacity | ||
| 528 | * value of top-level windows. | ||
| 529 | * Note that this method may sometimes return true, but the native | ||
| 530 | * windowing system may still not support the concept of | ||
| 531 | * translucency (due to the bugs in the windowing system). | ||
| 532 | */ | ||
| 533 | static boolean isWindowOpacitySupported() { | ||
| 534 | Toolkit curToolkit = Toolkit.getDefaultToolkit(); | ||
| 535 | if (!(curToolkit instanceof SunToolkit)) { | ||
| 536 | return false; | ||
| 537 | } | ||
| 538 | return ((SunToolkit)curToolkit).isWindowOpacitySupported(); | ||
| 539 | } | ||
| 540 | |||
| 541 | boolean isWindowPerpixelTranslucencySupported() { | ||
| 542 | /* | ||
| 543 | * Per-pixel alpha is supported if all the conditions are TRUE: | ||
| 544 | * 1. The toolkit is a sort of SunToolkit | ||
| 545 | * 2. The toolkit supports translucency in general | ||
| 546 | * (isWindowTranslucencySupported()) | ||
| 547 | * 3. There's at least one translucency-capable | ||
| 548 | * GraphicsConfiguration | ||
| 549 | */ | ||
| 550 | Toolkit curToolkit = Toolkit.getDefaultToolkit(); | ||
| 551 | if (!(curToolkit instanceof SunToolkit)) { | ||
| 552 | return false; | ||
| 553 | } | ||
| 554 | if (!((SunToolkit)curToolkit).isWindowTranslucencySupported()) { | ||
| 555 | return false; | ||
| 556 | } | ||
| 557 | |||
| 558 | // TODO: cache translucency capable GC | ||
| 559 | return getTranslucencyCapableGC() != null; | ||
| 560 | } | ||
| 561 | |||
| 562 | GraphicsConfiguration getTranslucencyCapableGC() { | ||
| 563 | // If the default GC supports translucency return true. | ||
| 564 | // It is important to optimize the verification this way, | ||
| 565 | // see CR 6661196 for more details. | ||
| 566 | GraphicsConfiguration defaultGC = getDefaultConfiguration(); | ||
| 567 | if (defaultGC.isTranslucencyCapable()) { | ||
| 568 | return defaultGC; | ||
| 569 | } | ||
| 570 | |||
| 571 | // ... otherwise iterate through all the GCs. | ||
| 572 | GraphicsConfiguration[] configs = getConfigurations(); | ||
| 573 | for (int j = 0; j < configs.length; j++) { | ||
| 574 | if (configs[j].isTranslucencyCapable()) { | ||
| 575 | return configs[j]; | ||
| 576 | } | ||
| 577 | } | ||
| 578 | |||
| 579 | return null; | ||
| 580 | } | ||
| 581 | } | ||