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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; 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 java.util.concurrent.atomic.AtomicInteger;
public final class RemoteSurfaceAllocator extends ISurfaceAllocator.Stub {
private static final String LOGTAG = "RemoteSurfaceAllocator";
private static RemoteSurfaceAllocator mInstance;
private final int mAllocatorId;
/// Monotonically increasing counter used to generate unique handles
/// for each SurfaceTexture by combining with mAllocatorId.
private static AtomicInteger sNextHandle = new AtomicInteger(1);
/**
* Retrieves the singleton allocator instance for this process.
*
* @param allocatorId A unique ID identifying the process this instance belongs to, which must be
* 0 for the parent process instance.
*/
public static synchronized RemoteSurfaceAllocator getInstance(final int allocatorId) {
if (mInstance == null) {
mInstance = new RemoteSurfaceAllocator(allocatorId);
}
return mInstance;
}
private RemoteSurfaceAllocator(final int allocatorId) {
mAllocatorId = allocatorId;
}
@Override
public GeckoSurface acquireSurface(
final int width, final int height, final boolean singleBufferMode) {
final long handle = ((long) mAllocatorId << 32) | sNextHandle.getAndIncrement();
final GeckoSurfaceTexture gst = GeckoSurfaceTexture.acquire(singleBufferMode, handle);
if (gst == null) {
return null;
}
if (width > 0 && height > 0) {
gst.setDefaultBufferSize(width, height);
}
return new GeckoSurface(gst);
}
@Override
public void releaseSurface(final long handle) {
final GeckoSurfaceTexture gst = GeckoSurfaceTexture.lookup(handle);
if (gst != null) {
gst.decrementUse();
}
}
@Override
public void configureSync(final SyncConfig config) {
final GeckoSurfaceTexture gst = GeckoSurfaceTexture.lookup(config.sourceTextureHandle);
if (gst != null) {
gst.configureSnapshot(config.targetSurface, config.width, config.height);
}
}
@Override
public void sync(final long handle) {
final GeckoSurfaceTexture gst = GeckoSurfaceTexture.lookup(handle);
if (gst != null) {
gst.takeSnapshot();
}
}
}
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