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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.gfx;
import android.opengl.GLES20;
import android.util.Log;
import java.util.concurrent.ArrayBlockingQueue;
import javax.microedition.khronos.egl.EGL10;
import javax.microedition.khronos.egl.EGLContext;
public class TextureGenerator {
private static final String LOGTAG = "TextureGenerator";
private static final int POOL_SIZE = 5;
private static TextureGenerator sSharedInstance;
private ArrayBlockingQueue<Integer> mTextureIds;
private EGLContext mContext;
private TextureGenerator() {
mTextureIds = new ArrayBlockingQueue<Integer>(POOL_SIZE);
}
public static TextureGenerator get() {
if (sSharedInstance == null)
sSharedInstance = new TextureGenerator();
return sSharedInstance;
}
public synchronized int take() {
try {
// Will block until one becomes available
return mTextureIds.take();
} catch (InterruptedException e) {
return 0;
}
}
public synchronized void fill() {
EGL10 egl = (EGL10) EGLContext.getEGL();
EGLContext context = egl.eglGetCurrentContext();
if (mContext != null && mContext != context) {
mTextureIds.clear();
}
mContext = context;
int numNeeded = mTextureIds.remainingCapacity();
if (numNeeded == 0)
return;
// Clear existing GL errors
int error;
while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) {
Log.w(LOGTAG, String.format("Clearing GL error: %#x", error));
}
int[] textures = new int[numNeeded];
GLES20.glGenTextures(numNeeded, textures, 0);
error = GLES20.glGetError();
if (error != GLES20.GL_NO_ERROR) {
Log.e(LOGTAG, String.format("Failed to generate textures: %#x", error), new Exception());
return;
}
for (int i = 0; i < numNeeded; i++) {
mTextureIds.offer(textures[i]);
}
}
}
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