1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mobile/android/base/gfx/TextureGenerator.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,77 @@
1.4 +/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +package org.mozilla.gecko.gfx;
1.10 +
1.11 +import android.opengl.GLES20;
1.12 +import android.util.Log;
1.13 +
1.14 +import java.util.concurrent.ArrayBlockingQueue;
1.15 +
1.16 +import javax.microedition.khronos.egl.EGL10;
1.17 +import javax.microedition.khronos.egl.EGLContext;
1.18 +
1.19 +public class TextureGenerator {
1.20 + private static final String LOGTAG = "TextureGenerator";
1.21 + private static final int POOL_SIZE = 5;
1.22 +
1.23 + private static TextureGenerator sSharedInstance;
1.24 +
1.25 + private ArrayBlockingQueue<Integer> mTextureIds;
1.26 + private EGLContext mContext;
1.27 +
1.28 + private TextureGenerator() { mTextureIds = new ArrayBlockingQueue<Integer>(POOL_SIZE); }
1.29 +
1.30 + public static TextureGenerator get() {
1.31 + if (sSharedInstance == null)
1.32 + sSharedInstance = new TextureGenerator();
1.33 + return sSharedInstance;
1.34 + }
1.35 +
1.36 + public synchronized int take() {
1.37 + try {
1.38 + // Will block until one becomes available
1.39 + return (int)mTextureIds.take();
1.40 + } catch (InterruptedException e) {
1.41 + return 0;
1.42 + }
1.43 + }
1.44 +
1.45 + public synchronized void fill() {
1.46 + EGL10 egl = (EGL10)EGLContext.getEGL();
1.47 + EGLContext context = egl.eglGetCurrentContext();
1.48 +
1.49 + if (mContext != null && mContext != context) {
1.50 + mTextureIds.clear();
1.51 + }
1.52 +
1.53 + mContext = context;
1.54 +
1.55 + int numNeeded = mTextureIds.remainingCapacity();
1.56 + if (numNeeded == 0)
1.57 + return;
1.58 +
1.59 + // Clear existing GL errors
1.60 + int error;
1.61 + while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) {
1.62 + Log.w(LOGTAG, String.format("Clearing GL error: %#x", error));
1.63 + }
1.64 +
1.65 + int[] textures = new int[numNeeded];
1.66 + GLES20.glGenTextures(numNeeded, textures, 0);
1.67 +
1.68 + error = GLES20.glGetError();
1.69 + if (error != GLES20.GL_NO_ERROR) {
1.70 + Log.e(LOGTAG, String.format("Failed to generate textures: %#x", error), new Exception());
1.71 + return;
1.72 + }
1.73 +
1.74 + for (int i = 0; i < numNeeded; i++) {
1.75 + mTextureIds.offer(textures[i]);
1.76 + }
1.77 + }
1.78 +}
1.79 +
1.80 +
