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Use a Virtual display to host UI Widgets
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98 changes: 98 additions & 0 deletions
98
app/src/common/shared/org/mozilla/vrbrowser/ui/OffscreenDisplay.java
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| @@ -0,0 +1,98 @@ | ||
| /* -*- 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/. */ | ||
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| package org.mozilla.vrbrowser.ui; | ||
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| import android.app.Presentation; | ||
| import android.content.Context; | ||
| import android.content.DialogInterface; | ||
| import android.graphics.SurfaceTexture; | ||
| import android.hardware.display.DisplayManager; | ||
| import android.hardware.display.VirtualDisplay; | ||
| import android.os.Bundle; | ||
| import android.util.DisplayMetrics; | ||
| import android.view.Display; | ||
| import android.view.LayoutInflater; | ||
| import android.view.Surface; | ||
| import android.view.View; | ||
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| public class OffscreenDisplay { | ||
| private Context mContext; | ||
| private VirtualDisplay mVirtualDisplay; | ||
| private SurfaceTexture mTexture; | ||
| private Surface mSurface; | ||
| private OffscreenPresentation mPresentation; | ||
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| private DisplayMetrics mDefaultMetrics; | ||
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| public OffscreenDisplay(Context aContext, SurfaceTexture aTexture, int aWidth, int aHeight) { | ||
| mContext = aContext; | ||
| aTexture.setDefaultBufferSize(aWidth, aHeight); | ||
| mSurface = new Surface(aTexture); | ||
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| DisplayManager manager = (DisplayManager) aContext.getSystemService(Context.DISPLAY_SERVICE); | ||
| Display defaultDisplay = manager.getDisplay(Display.DEFAULT_DISPLAY); | ||
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| mDefaultMetrics = new DisplayMetrics(); | ||
| defaultDisplay.getMetrics(mDefaultMetrics); | ||
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| int flags = DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY | | ||
| DisplayManager.VIRTUAL_DISPLAY_FLAG_PRESENTATION | | ||
| DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC; | ||
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| mVirtualDisplay = manager.createVirtualDisplay("OffscreenViews", aWidth, aHeight, | ||
| mDefaultMetrics.densityDpi, mSurface, flags); | ||
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| mPresentation = new OffscreenPresentation(mContext, mVirtualDisplay.getDisplay()); | ||
| mPresentation.show(); | ||
| } | ||
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| public void setContentView(View aView) { | ||
| if (mPresentation == null) { | ||
| throw new IllegalStateException("No presentation!"); | ||
| } | ||
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| mPresentation.setContentView(aView); | ||
| } | ||
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| public void resize(int aWidth, int aHeight) { | ||
| if (mVirtualDisplay == null) { | ||
| throw new IllegalStateException("No virtual display!"); | ||
| } | ||
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| mVirtualDisplay.resize(aWidth, aHeight, mDefaultMetrics.densityDpi); | ||
| } | ||
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| public void release() { | ||
| if (mPresentation != null) { | ||
| mPresentation.dismiss(); | ||
| mPresentation = null; | ||
| } | ||
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| if (mVirtualDisplay != null) { | ||
| mVirtualDisplay.release(); | ||
| mVirtualDisplay = null; | ||
| } | ||
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| if (mSurface != null) { | ||
| mSurface.release(); | ||
| } | ||
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| if (mTexture != null) { | ||
| mTexture.release(); | ||
| } | ||
| } | ||
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| class OffscreenPresentation extends Presentation { | ||
| OffscreenPresentation(Context context, Display display) { | ||
| super(context, display); | ||
| } | ||
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| @Override | ||
| public void onCreate(Bundle savedInstanceState) { | ||
| super.onCreate(savedInstanceState); | ||
| } | ||
| } | ||
| } |
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