Android Open Source - Android-Universal-Image-Loader Image Scale Type

From Project

Back to project page Android-Universal-Image-Loader.
License

The source code is released under:
Apache License
If you think the Android project Android-Universal-Image-Loader listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

/*******************************************************************************
 * Copyright 2011-2014 Sergey Tarasevich
 *// w  w w . jav a  2s  . co m
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.nostra13.universalimageloader.core.assist;

/**
 * Type of image scaling during decoding.
 *
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
 * @since 1.5.0
 */
public enum ImageScaleType {
  /** Image won't be scaled */
  NONE,
  /**
   * Image will be scaled down only if image size is greater than
   * {@linkplain javax.microedition.khronos.opengles.GL10#GL_MAX_TEXTURE_SIZE maximum acceptable texture size}.
   * Usually it's 2048x2048.<br />
   * If Bitmap is expected to display than it must not exceed this size (otherwise you'll get the exception
   * "OpenGLRenderer: Bitmap too large to be uploaded into a texture".<br />
   * Image will be subsampled in an integer number of times (1, 2, 3, ...) to maximum texture size of device.
   */
  NONE_SAFE,
  /**
   * Image will be reduces 2-fold until next reduce step make image smaller target size.<br />
   * It's <b>fast</b> type and it's preferable for usage in lists/grids/galleries (and other
   * {@linkplain android.widget.AdapterView adapter-views}) .<br />
   * Relates to {@link android.graphics.BitmapFactory.Options#inSampleSize}<br />
   * Note: If original image size is smaller than target size then original image <b>won't</b> be scaled.
   */
  IN_SAMPLE_POWER_OF_2,
  /**
   * Image will be subsampled in an integer number of times (1, 2, 3, ...). Use it if memory economy is quite
   * important.<br />
   * Relates to {@link android.graphics.BitmapFactory.Options#inSampleSize}<br />
   * Note: If original image size is smaller than target size then original image <b>won't</b> be scaled.
   */
  IN_SAMPLE_INT,
  /**
   * Image will scaled-down exactly to target size (scaled width or height or both will be equal to target size;
   * depends on {@linkplain android.widget.ImageView.ScaleType ImageView's scale type}). Use it if memory economy is
   * critically important.<br />
   * <b>Note:</b> If original image size is smaller than target size then original image <b>won't</b> be scaled.<br />
   * <br />
   * <b>NOTE:</b> For creating result Bitmap (of exact size) additional Bitmap will be created with
   * {@link android.graphics.Bitmap#createBitmap(android.graphics.Bitmap, int, int, int, int, android.graphics.Matrix, boolean)
   * Bitmap.createBitmap(...)}.<br />
   * <b>Cons:</b> Saves memory by keeping smaller Bitmap in memory cache (comparing with IN_SAMPLE... scale types)<br />
   * <b>Pros:</b> Requires more memory in one time for creation of result Bitmap.
   */
  EXACTLY,
  /**
   * Image will scaled exactly to target size (scaled width or height or both will be equal to target size; depends on
   * {@linkplain android.widget.ImageView.ScaleType ImageView's scale type}). Use it if memory economy is critically
   * important.<br />
   * <b>Note:</b> If original image size is smaller than target size then original image <b>will be stretched</b> to
   * target size.<br />
   * <br />
   * <b>NOTE:</b> For creating result Bitmap (of exact size) additional Bitmap will be created with
   * {@link android.graphics.Bitmap#createBitmap(android.graphics.Bitmap, int, int, int, int, android.graphics.Matrix, boolean)
   * Bitmap.createBitmap(...)}.<br />
   * <b>Cons:</b> Saves memory by keeping smaller Bitmap in memory cache (comparing with IN_SAMPLE... scale types)<br />
   * <b>Pros:</b> Requires more memory in one time for creation of result Bitmap.
   */
  EXACTLY_STRETCHED
}
Java Source Code List
