Android Open Source - lucene H W Acceleration

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License

The source code is released under:

GNU General Public License

Java Source Code

/**
 * Copyright (C) 2011-2012 Takahiro Yoshimura
 *//from  www  . ja  v  a2s .c  o  m
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * AdMob library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 *
 * You must obey the GNU General Public License in all respects for
 * all of the code used other than AdMob.  If you modify file(s) with
 * this exception, you may extend this exception to your version of
 * the file(s), but you are not obligated to do so.  If you do not
 * wish to do so, delete this exception statement from your version.
 * If you delete this exception statement from all source files in the
 * program, then also delete it here.
 */

package com.gmail.altakey.lucene;

import android.view.View;
import android.util.Log;
import android.graphics.Canvas;
import android.preference.PreferenceManager;
import android.content.SharedPreferences;
import java.util.*;

public final class HWAcceleration
{
  private final View view;

  private static final int SOFTWARE = -1;
  private static final int UNKNOWN = -2;
    
  private int maxBitmapWidth = UNKNOWN;
  private int maxBitmapHeight = UNKNOWN;

  public HWAcceleration(View view)
  {
    this.view = view;
  }
    
  public boolean isEnabled()
  {
    try
    {
      return this.view.isHardwareAccelerated() && (this.view.getLayerType() != View.LAYER_TYPE_SOFTWARE);
    }
    catch (NoSuchMethodError e)
    {
      return false;
    }
  }
    
  public void enable(boolean enabled) throws ActivityRestartRequired
  {
    try
    {
      int fromType = this.view.getLayerType();
      int toType = enabled ? View.LAYER_TYPE_HARDWARE : View.LAYER_TYPE_SOFTWARE;
        
      if (fromType != toType)
      {
        if (this.maxBitmapWidth != UNKNOWN || this.maxBitmapHeight != UNKNOWN)
          throw new ActivityRestartRequired();
      }
        
      this.maxBitmapWidth = UNKNOWN;
      this.maxBitmapHeight = UNKNOWN;
      this.view.setLayerType(toType, null);
      this.view.invalidate();
    }
    catch (NoSuchMethodError e)
    {
    }
  }

  public void note(Canvas canvas)
  {
    if (this.maxBitmapWidth == UNKNOWN && this.maxBitmapHeight == UNKNOWN)
    {
      if (!this.isEnabled())
      {
        this.maxBitmapWidth = SOFTWARE;
        this.maxBitmapHeight = SOFTWARE;
      }
      else
      {
        try
        {
          this.maxBitmapWidth = canvas.getMaximumBitmapWidth();
          this.maxBitmapHeight = canvas.getMaximumBitmapHeight();
        }
        catch (NoSuchMethodError e)
        {
          this.maxBitmapWidth = 2048;
          this.maxBitmapHeight = 2048;
        }
        Log.d("HWIV.HA.oD", String.format("max: (%d, %d)", this.maxBitmapWidth, this.maxBitmapHeight));
      }
    }
  }

  public int getMaximumBitmapWidth()
  {
    return this.maxBitmapWidth;
  }
    
  public int getMaximumBitmapHeight()
  {
    return this.maxBitmapHeight;
  }
}

Java Source Code List

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