1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2 <!-- NewPage --> 3 <html lang="en"> 4 <head> 5 <!-- Generated by javadoc --> 6 <title>SkiaPooledImageRegionDecoder (library 3.9.0 API)</title> 7 <link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style"> 8 <script type="text/javascript" src="../../../../../script.js"></script> 9 </head> 10 <body> 11 <script type="text/javascript"><!-- 12 try { 13 if (location.href.indexOf('is-external=true') == -1) { 14 parent.document.title="SkiaPooledImageRegionDecoder (library 3.9.0 API)"; 15 } 16 } 17 catch(err) { 18 } 19 //--> 20 var methods = {"i0":10,"i1":10,"i2":10,"i3":10,"i4":10,"i5":9}; 21 var tabs = {65535:["t0","All Methods"],1:["t1","Static Methods"],2:["t2","Instance Methods"],8:["t4","Concrete Methods"]}; 22 var altColor = "altColor"; 23 var rowColor = "rowColor"; 24 var tableTab = "tableTab"; 25 var activeTableTab = "activeTableTab"; 26 </script> 27 <noscript> 28 <div>JavaScript is disabled on your browser.</div> 29 </noscript> 30 <!-- ========= START OF TOP NAVBAR ======= --> 31 <div class="topNav"><a name="navbar.top"> 32 <!-- --> 33 </a> 34 <div class="skipNav"><a href="#skip.navbar.top" title="Skip navigation links">Skip navigation links</a></div> 35 <a name="navbar.top.firstrow"> 36 <!-- --> 37 </a> 38 <ul class="navList" title="Navigation"> 39 <li><a href="../../../../../overview-summary.html">Overview</a></li> 40 <li><a href="package-summary.html">Package</a></li> 41 <li class="navBarCell1Rev">Class</li> 42 <li><a href="package-tree.html">Tree</a></li> 43 <li><a href="../../../../../deprecated-list.html">Deprecated</a></li> 44 <li><a href="../../../../../index-all.html">Index</a></li> 45 <li><a href="../../../../../help-doc.html">Help</a></li> 46 </ul> 47 </div> 48 <div class="subNav"> 49 <ul class="navList"> 50 <li><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaImageRegionDecoder.html" title="class in com.davemorrissey.labs.subscaleview.decoder"><span class="typeNameLink">Prev Class</span></a></li> 51 <li>Next Class</li> 52 </ul> 53 <ul class="navList"> 54 <li><a href="../../../../../index.html?com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html" target="_top">Frames</a></li> 55 <li><a href="SkiaPooledImageRegionDecoder.html" target="_top">No Frames</a></li> 56 </ul> 57 <ul class="navList" id="allclasses_navbar_top"> 58 <li><a href="../../../../../allclasses-noframe.html">All Classes</a></li> 59 </ul> 60 <div> 61 <script type="text/javascript"><!-- 62 allClassesLink = document.getElementById("allclasses_navbar_top"); 63 if(window==top) { 64 allClassesLink.style.display = "block"; 65 } 66 else { 67 allClassesLink.style.display = "none"; 68 } 69 //--> 70 </script> 71 </div> 72 <div> 73 <ul class="subNavList"> 74 <li>Summary: </li> 75 <li>Nested | </li> 76 <li>Field | </li> 77 <li><a href="#constructor.summary">Constr</a> | </li> 78 <li><a href="#method.summary">Method</a></li> 79 </ul> 80 <ul class="subNavList"> 81 <li>Detail: </li> 82 <li>Field | </li> 83 <li><a href="#constructor.detail">Constr</a> | </li> 84 <li><a href="#method.detail">Method</a></li> 85 </ul> 86 </div> 87 <a name="skip.navbar.top"> 88 <!-- --> 89 </a></div> 90 <!-- ========= END OF TOP NAVBAR ========= --> 91 <!-- ======== START OF CLASS DATA ======== --> 92 <div class="header"> 93 <div class="subTitle">com.davemorrissey.labs.subscaleview.decoder</div> 94 <h2 title="Class SkiaPooledImageRegionDecoder" class="title">Class SkiaPooledImageRegionDecoder</h2> 95 </div> 96 <div class="contentContainer"> 97 <ul class="inheritance"> 98 <li><a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> 99 <li> 100 <ul class="inheritance"> 101 <li>com.davemorrissey.labs.subscaleview.decoder.SkiaPooledImageRegionDecoder</li> 102 </ul> 103 </li> 104 </ul> 105 <div class="description"> 106 <ul class="blockList"> 107 <li class="blockList"> 108 <dl> 109 <dt>All Implemented Interfaces:</dt> 110 <dd><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/ImageRegionDecoder.html" title="interface in com.davemorrissey.labs.subscaleview.decoder">ImageRegionDecoder</a></dd> 111 </dl> 112 <hr> 113 <br> 114 <pre>public class <span class="typeNameLabel">SkiaPooledImageRegionDecoder</span> 115 extends <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> 116 implements <a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/ImageRegionDecoder.html" title="interface in com.davemorrissey.labs.subscaleview.decoder">ImageRegionDecoder</a></pre> 117 <div class="block"><p> 118 An implementation of <a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/ImageRegionDecoder.html" title="interface in com.davemorrissey.labs.subscaleview.decoder"><code>ImageRegionDecoder</code></a> using a pool of <a href="https://developer.android.com/reference/android/graphics/BitmapRegionDecoder.html?is-external=true" title="class or interface in android.graphics"><code>BitmapRegionDecoder</code></a>s, 119 to provide true parallel loading of tiles. This is only effective if parallel loading has been 120 enabled in the view by calling <a href="../../../../../com/davemorrissey/labs/subscaleview/SubsamplingScaleImageView.html#setExecutor-java.util.concurrent.Executor-"><code>SubsamplingScaleImageView.setExecutor(Executor)</code></a> 121 with a multi-threaded <a href="https://developer.android.com/reference/java/util/concurrent/Executor.html?is-external=true" title="class or interface in java.util.concurrent"><code>Executor</code></a> instance. 122 </p><p> 123 One decoder is initialised when the class is initialised. This is enough to decode base layer tiles. 124 Additional decoders are initialised when a subregion of the image is first requested, which indicates 125 interaction with the view. Creation of additional encoders stops when <a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#allowAdditionalDecoder-int-long-"><code>allowAdditionalDecoder(int, long)</code></a> 126 returns false. The default implementation takes into account the file size, number of CPU cores, 127 low memory status and a hard limit of 4. Extend this class to customise this. 128 </p><p> 129 <b>WARNING:</b> This class is highly experimental and not proven to be stable on a wide range of 130 devices. You are advised to test it thoroughly on all available devices, and code your app to use 131 <a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaImageRegionDecoder.html" title="class in com.davemorrissey.labs.subscaleview.decoder"><code>SkiaImageRegionDecoder</code></a> on old or low powered devices you could not test. 132 </p></div> 133 </li> 134 </ul> 135 </div> 136 <div class="summary"> 137 <ul class="blockList"> 138 <li class="blockList"> 139 <!-- ======== CONSTRUCTOR SUMMARY ======== --> 140 <ul class="blockList"> 141 <li class="blockList"><a name="constructor.summary"> 142 <!-- --> 143 </a> 144 <h3>Constructor Summary</h3> 145 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> 146 <caption><span>Constructors</span><span class="tabEnd"> </span></caption> 147 <tr> 148 <th class="colOne" scope="col">Constructor and Description</th> 149 </tr> 150 <tr class="altColor"> 151 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#SkiaPooledImageRegionDecoder--">SkiaPooledImageRegionDecoder</a></span>()</code> </td> 152 </tr> 153 <tr class="rowColor"> 154 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#SkiaPooledImageRegionDecoder-android.graphics.Bitmap.Config-">SkiaPooledImageRegionDecoder</a></span>(<a href="https://developer.android.com/reference/android/graphics/Bitmap.Config.html?is-external=true" title="class or interface in android.graphics">Bitmap.Config</a> bitmapConfig)</code> </td> 155 </tr> 156 </table> 157 </li> 158 </ul> 159 <!-- ========== METHOD SUMMARY =========== --> 160 <ul class="blockList"> 161 <li class="blockList"><a name="method.summary"> 162 <!-- --> 163 </a> 164 <h3>Method Summary</h3> 165 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> 166 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> 167 <tr> 168 <th class="colFirst" scope="col">Modifier and Type</th> 169 <th class="colLast" scope="col">Method and Description</th> 170 </tr> 171 <tr id="i0" class="altColor"> 172 <td class="colFirst"><code>protected boolean</code></td> 173 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#allowAdditionalDecoder-int-long-">allowAdditionalDecoder</a></span>(int numberOfDecoders, 174 long fileLength)</code> 175 <div class="block">Called before creating a new decoder.</div> 176 </td> 177 </tr> 178 <tr id="i1" class="rowColor"> 179 <td class="colFirst"><code><a href="https://developer.android.com/reference/android/graphics/Bitmap.html?is-external=true" title="class or interface in android.graphics">Bitmap</a></code></td> 180 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#decodeRegion-android.graphics.Rect-int-">decodeRegion</a></span>(<a href="https://developer.android.com/reference/android/graphics/Rect.html?is-external=true" title="class or interface in android.graphics">Rect</a> sRect, 181 int sampleSize)</code> 182 <div class="block">Acquire a read lock to prevent decoding overlapping with recycling, then check the pool still 183 exists and acquire a decoder to load the requested region.</div> 184 </td> 185 </tr> 186 <tr id="i2" class="altColor"> 187 <td class="colFirst"><code><a href="https://developer.android.com/reference/android/graphics/Point.html?is-external=true" title="class or interface in android.graphics">Point</a></code></td> 188 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#init-android.content.Context-android.net.Uri-">init</a></span>(<a href="https://developer.android.com/reference/android/content/Context.html?is-external=true" title="class or interface in android.content">Context</a> context, 189 <a href="https://developer.android.com/reference/android/net/Uri.html?is-external=true" title="class or interface in android.net">Uri</a> uri)</code> 190 <div class="block">Initialises the decoder pool.</div> 191 </td> 192 </tr> 193 <tr id="i3" class="rowColor"> 194 <td class="colFirst"><code>boolean</code></td> 195 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#isReady--">isReady</a></span>()</code> 196 <div class="block">Holding a read lock to avoid returning true while the pool is being recycled, this returns 197 true if the pool has at least one decoder available.</div> 198 </td> 199 </tr> 200 <tr id="i4" class="altColor"> 201 <td class="colFirst"><code>void</code></td> 202 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#recycle--">recycle</a></span>()</code> 203 <div class="block">Wait until all read locks held by <a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#decodeRegion-android.graphics.Rect-int-"><code>decodeRegion(Rect, int)</code></a> are released, then recycle 204 and destroy the pool.</div> 205 </td> 206 </tr> 207 <tr id="i5" class="rowColor"> 208 <td class="colFirst"><code>static void</code></td> 209 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#setDebug-boolean-">setDebug</a></span>(boolean debug)</code> 210 <div class="block">Controls logging of debug messages.</div> 211 </td> 212 </tr> 213 </table> 214 <ul class="blockList"> 215 <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> 216 <!-- --> 217 </a> 218 <h3>Methods inherited from class java.lang.<a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> 219 <code><a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> 220 </ul> 221 </li> 222 </ul> 223 </li> 224 </ul> 225 </div> 226 <div class="details"> 227 <ul class="blockList"> 228 <li class="blockList"> 229 <!-- ========= CONSTRUCTOR DETAIL ======== --> 230 <ul class="blockList"> 231 <li class="blockList"><a name="constructor.detail"> 232 <!-- --> 233 </a> 234 <h3>Constructor Detail</h3> 235 <a name="SkiaPooledImageRegionDecoder--"> 236 <!-- --> 237 </a> 238 <ul class="blockList"> 239 <li class="blockList"> 240 <h4>SkiaPooledImageRegionDecoder</h4> 241 <pre>public SkiaPooledImageRegionDecoder()</pre> 242 </li> 243 </ul> 244 <a name="SkiaPooledImageRegionDecoder-android.graphics.Bitmap.Config-"> 245 <!-- --> 246 </a> 247 <ul class="blockListLast"> 248 <li class="blockList"> 249 <h4>SkiaPooledImageRegionDecoder</h4> 250 <pre>public SkiaPooledImageRegionDecoder(<a href="https://developer.android.com/reference/android/graphics/Bitmap.Config.html?is-external=true" title="class or interface in android.graphics">Bitmap.Config</a> bitmapConfig)</pre> 251 </li> 252 </ul> 253 </li> 254 </ul> 255 <!-- ============ METHOD DETAIL ========== --> 256 <ul class="blockList"> 257 <li class="blockList"><a name="method.detail"> 258 <!-- --> 259 </a> 260 <h3>Method Detail</h3> 261 <a name="setDebug-boolean-"> 262 <!-- --> 263 </a> 264 <ul class="blockList"> 265 <li class="blockList"> 266 <h4>setDebug</h4> 267 <pre>public static void setDebug(boolean debug)</pre> 268 <div class="block">Controls logging of debug messages. All instances are affected.</div> 269 <dl> 270 <dt><span class="paramLabel">Parameters:</span></dt> 271 <dd><code>debug</code> - true to enable debug logging, false to disable.</dd> 272 </dl> 273 </li> 274 </ul> 275 <a name="init-android.content.Context-android.net.Uri-"> 276 <!-- --> 277 </a> 278 <ul class="blockList"> 279 <li class="blockList"> 280 <h4>init</h4> 281 <pre>public <a href="https://developer.android.com/reference/android/graphics/Point.html?is-external=true" title="class or interface in android.graphics">Point</a> init(<a href="https://developer.android.com/reference/android/content/Context.html?is-external=true" title="class or interface in android.content">Context</a> context, 282 <a href="https://developer.android.com/reference/android/net/Uri.html?is-external=true" title="class or interface in android.net">Uri</a> uri) 283 throws <a href="https://developer.android.com/reference/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre> 284 <div class="block">Initialises the decoder pool. This method creates one decoder on the current thread and uses 285 it to decode the bounds, then spawns an independent thread to populate the pool with an 286 additional three decoders. The thread will abort if <a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#recycle--"><code>recycle()</code></a> is called.</div> 287 <dl> 288 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> 289 <dd><code><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/ImageRegionDecoder.html#init-android.content.Context-android.net.Uri-">init</a></code> in interface <code><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/ImageRegionDecoder.html" title="interface in com.davemorrissey.labs.subscaleview.decoder">ImageRegionDecoder</a></code></dd> 290 <dt><span class="paramLabel">Parameters:</span></dt> 291 <dd><code>context</code> - Application context. A reference may be held, but must be cleared on recycle.</dd> 292 <dd><code>uri</code> - URI of the image.</dd> 293 <dt><span class="returnLabel">Returns:</span></dt> 294 <dd>Dimensions of the image.</dd> 295 <dt><span class="throwsLabel">Throws:</span></dt> 296 <dd><code><a href="https://developer.android.com/reference/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code> - if initialisation fails.</dd> 297 </dl> 298 </li> 299 </ul> 300 <a name="decodeRegion-android.graphics.Rect-int-"> 301 <!-- --> 302 </a> 303 <ul class="blockList"> 304 <li class="blockList"> 305 <h4>decodeRegion</h4> 306 <pre>public <a href="https://developer.android.com/reference/android/graphics/Bitmap.html?is-external=true" title="class or interface in android.graphics">Bitmap</a> decodeRegion(<a href="https://developer.android.com/reference/android/graphics/Rect.html?is-external=true" title="class or interface in android.graphics">Rect</a> sRect, 307 int sampleSize)</pre> 308 <div class="block">Acquire a read lock to prevent decoding overlapping with recycling, then check the pool still 309 exists and acquire a decoder to load the requested region. There is no check whether the pool 310 currently has decoders, because it's guaranteed to have one decoder after <a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#init-android.content.Context-android.net.Uri-"><code>init(Context, Uri)</code></a> 311 is called and be null once <a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#recycle--"><code>recycle()</code></a> is called. In practice the view can't call this 312 method until after <a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#init-android.content.Context-android.net.Uri-"><code>init(Context, Uri)</code></a>, so there will be no blocking on an empty pool.</div> 313 <dl> 314 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> 315 <dd><code><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/ImageRegionDecoder.html#decodeRegion-android.graphics.Rect-int-">decodeRegion</a></code> in interface <code><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/ImageRegionDecoder.html" title="interface in com.davemorrissey.labs.subscaleview.decoder">ImageRegionDecoder</a></code></dd> 316 <dt><span class="paramLabel">Parameters:</span></dt> 317 <dd><code>sRect</code> - Source image rectangle to decode.</dd> 318 <dd><code>sampleSize</code> - Sample size.</dd> 319 <dt><span class="returnLabel">Returns:</span></dt> 320 <dd>The decoded region. It is safe to return null if decoding fails.</dd> 321 </dl> 322 </li> 323 </ul> 324 <a name="isReady--"> 325 <!-- --> 326 </a> 327 <ul class="blockList"> 328 <li class="blockList"> 329 <h4>isReady</h4> 330 <pre>public boolean isReady()</pre> 331 <div class="block">Holding a read lock to avoid returning true while the pool is being recycled, this returns 332 true if the pool has at least one decoder available.</div> 333 <dl> 334 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> 335 <dd><code><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/ImageRegionDecoder.html#isReady--">isReady</a></code> in interface <code><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/ImageRegionDecoder.html" title="interface in com.davemorrissey.labs.subscaleview.decoder">ImageRegionDecoder</a></code></dd> 336 <dt><span class="returnLabel">Returns:</span></dt> 337 <dd>true if the decoder is ready to be used.</dd> 338 </dl> 339 </li> 340 </ul> 341 <a name="recycle--"> 342 <!-- --> 343 </a> 344 <ul class="blockList"> 345 <li class="blockList"> 346 <h4>recycle</h4> 347 <pre>public void recycle()</pre> 348 <div class="block">Wait until all read locks held by <a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html#decodeRegion-android.graphics.Rect-int-"><code>decodeRegion(Rect, int)</code></a> are released, then recycle 349 and destroy the pool. Elsewhere, when a read lock is acquired, we must check the pool is not null.</div> 350 <dl> 351 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> 352 <dd><code><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/ImageRegionDecoder.html#recycle--">recycle</a></code> in interface <code><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/ImageRegionDecoder.html" title="interface in com.davemorrissey.labs.subscaleview.decoder">ImageRegionDecoder</a></code></dd> 353 </dl> 354 </li> 355 </ul> 356 <a name="allowAdditionalDecoder-int-long-"> 357 <!-- --> 358 </a> 359 <ul class="blockListLast"> 360 <li class="blockList"> 361 <h4>allowAdditionalDecoder</h4> 362 <pre>protected boolean allowAdditionalDecoder(int numberOfDecoders, 363 long fileLength)</pre> 364 <div class="block">Called before creating a new decoder. Based on number of CPU cores, available memory, and the 365 size of the image file, determines whether another decoder can be created. Subclasses can 366 override and customise this.</div> 367 <dl> 368 <dt><span class="paramLabel">Parameters:</span></dt> 369 <dd><code>numberOfDecoders</code> - the number of decoders that have been created so far</dd> 370 <dd><code>fileLength</code> - the size of the image file in bytes. Creating another decoder will use approximately this much native memory.</dd> 371 <dt><span class="returnLabel">Returns:</span></dt> 372 <dd>true if another decoder can be created.</dd> 373 </dl> 374 </li> 375 </ul> 376 </li> 377 </ul> 378 </li> 379 </ul> 380 </div> 381 </div> 382 <!-- ========= END OF CLASS DATA ========= --> 383 <!-- ======= START OF BOTTOM NAVBAR ====== --> 384 <div class="bottomNav"><a name="navbar.bottom"> 385 <!-- --> 386 </a> 387 <div class="skipNav"><a href="#skip.navbar.bottom" title="Skip navigation links">Skip navigation links</a></div> 388 <a name="navbar.bottom.firstrow"> 389 <!-- --> 390 </a> 391 <ul class="navList" title="Navigation"> 392 <li><a href="../../../../../overview-summary.html">Overview</a></li> 393 <li><a href="package-summary.html">Package</a></li> 394 <li class="navBarCell1Rev">Class</li> 395 <li><a href="package-tree.html">Tree</a></li> 396 <li><a href="../../../../../deprecated-list.html">Deprecated</a></li> 397 <li><a href="../../../../../index-all.html">Index</a></li> 398 <li><a href="../../../../../help-doc.html">Help</a></li> 399 </ul> 400 </div> 401 <div class="subNav"> 402 <ul class="navList"> 403 <li><a href="../../../../../com/davemorrissey/labs/subscaleview/decoder/SkiaImageRegionDecoder.html" title="class in com.davemorrissey.labs.subscaleview.decoder"><span class="typeNameLink">Prev Class</span></a></li> 404 <li>Next Class</li> 405 </ul> 406 <ul class="navList"> 407 <li><a href="../../../../../index.html?com/davemorrissey/labs/subscaleview/decoder/SkiaPooledImageRegionDecoder.html" target="_top">Frames</a></li> 408 <li><a href="SkiaPooledImageRegionDecoder.html" target="_top">No Frames</a></li> 409 </ul> 410 <ul class="navList" id="allclasses_navbar_bottom"> 411 <li><a href="../../../../../allclasses-noframe.html">All Classes</a></li> 412 </ul> 413 <div> 414 <script type="text/javascript"><!-- 415 allClassesLink = document.getElementById("allclasses_navbar_bottom"); 416 if(window==top) { 417 allClassesLink.style.display = "block"; 418 } 419 else { 420 allClassesLink.style.display = "none"; 421 } 422 //--> 423 </script> 424 </div> 425 <div> 426 <ul class="subNavList"> 427 <li>Summary: </li> 428 <li>Nested | </li> 429 <li>Field | </li> 430 <li><a href="#constructor.summary">Constr</a> | </li> 431 <li><a href="#method.summary">Method</a></li> 432 </ul> 433 <ul class="subNavList"> 434 <li>Detail: </li> 435 <li>Field | </li> 436 <li><a href="#constructor.detail">Constr</a> | </li> 437 <li><a href="#method.detail">Method</a></li> 438 </ul> 439 </div> 440 <a name="skip.navbar.bottom"> 441 <!-- --> 442 </a></div> 443 <!-- ======== END OF BOTTOM NAVBAR ======= --> 444 </body> 445 </html> 446
