android/source/src/java/org/mozilla/gecko/gfx/TextureReaper.java

   1 /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
   2  * This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 package org.mozilla.gecko.gfx;
   7
   8 import android.opengl.GLES20;
   9 import android.util.Log;
  10
  11 import java.util.ArrayList;
  12
  13 /**
  14  * Manages a list of dead tiles, so we don't leak resources.
  15  */
  16 public class TextureReaper {
  17     private static TextureReaper sSharedInstance;
  18     private ArrayList<Integer> mDeadTextureIDs = new ArrayList<Integer>();
  19     private static final String LOGTAG = TextureReaper.class.getSimpleName();
  20
  21     private TextureReaper() {
  22     }
  23
  24     public static TextureReaper get() {
  25         if (sSharedInstance == null) {
  26             sSharedInstance = new TextureReaper();
  27         }
  28         return sSharedInstance;
  29     }
  30
  31     public void add(int[] textureIDs) {
  32         for (int textureID : textureIDs) {
  33             add(textureID);
  34         }
  35     }
  36
  37     public synchronized void add(int textureID) {
  38         mDeadTextureIDs.add(textureID);
  39     }
  40
  41     public synchronized void  reap() {
  42         int numTextures = mDeadTextureIDs.size();
  43         // Adreno 200 will generate INVALID_VALUE if len == 0 is passed to glDeleteTextures,
  44         // even though it's not supposed to.
  45         if (numTextures == 0)
  46             return;
  47
  48         int[] deadTextureIDs = new int[numTextures];
  49         for (int i = 0; i < numTextures; i++) {
  50             Integer id = mDeadTextureIDs.get(i);
  51             if (id == null) {
  52                 deadTextureIDs[i] = 0;
  53                 Log.e(LOGTAG, "Dead texture id is null");
  54             } else {
  55                 deadTextureIDs[i] = mDeadTextureIDs.get(i);
  56             }
  57         }
  58         mDeadTextureIDs.clear();
  59
  60         GLES20.glDeleteTextures(deadTextureIDs.length, deadTextureIDs, 0);
  61     }
  62 }