/*******************************************************************************
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* Copyright 2011-2014 Sergey Tarasevich
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*******************************************************************************/
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package com.nostra13.universalimageloader.core.assist;
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/**
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* Type of image scaling during decoding.
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*
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* @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
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* @since 1.5.0
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*/
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public enum ImageScaleType {
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/** Image won't be scaled */
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NONE,
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/**
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* Image will be scaled down only if image size is greater than
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* {@linkplain javax.microedition.khronos.opengles.GL10#GL_MAX_TEXTURE_SIZE maximum acceptable texture size}.
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* Usually it's 2048x2048.<br />
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* If Bitmap is expected to display than it must not exceed this size (otherwise you'll get the exception
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* "OpenGLRenderer: Bitmap too large to be uploaded into a texture".<br />
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* Image will be subsampled in an integer number of times (1, 2, 3, ...) to maximum texture size of device.
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*/
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NONE_SAFE,
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/**
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* Image will be reduces 2-fold until next reduce step make image smaller target size.<br />
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* It's <b>fast</b> type and it's preferable for usage in lists/grids/galleries (and other
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* {@linkplain android.widget.AdapterView adapter-views}) .<br />
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* Relates to {@link android.graphics.BitmapFactory.Options#inSampleSize}<br />
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* Note: If original image size is smaller than target size then original image <b>won't</b> be scaled.
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*/
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IN_SAMPLE_POWER_OF_2,
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/**
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* Image will be subsampled in an integer number of times (1, 2, 3, ...). Use it if memory economy is quite
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* important.<br />
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* Relates to {@link android.graphics.BitmapFactory.Options#inSampleSize}<br />
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* Note: If original image size is smaller than target size then original image <b>won't</b> be scaled.
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*/
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IN_SAMPLE_INT,
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/**
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* Image will scaled-down exactly to target size (scaled width or height or both will be equal to target size;
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* depends on {@linkplain android.widget.ImageView.ScaleType ImageView's scale type}). Use it if memory economy is
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* critically important.<br />
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* <b>Note:</b> If original image size is smaller than target size then original image <b>won't</b> be scaled.<br />
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* <br />
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* <b>NOTE:</b> For creating result Bitmap (of exact size) additional Bitmap will be created with
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* {@link android.graphics.Bitmap#createBitmap(android.graphics.Bitmap, int, int, int, int, android.graphics.Matrix, boolean)
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* Bitmap.createBitmap(...)}.<br />
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* <b>Cons:</b> Saves memory by keeping smaller Bitmap in memory cache (comparing with IN_SAMPLE... scale types)<br />
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* <b>Pros:</b> Requires more memory in one time for creation of result Bitmap.
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*/
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EXACTLY,
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/**
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* Image will scaled exactly to target size (scaled width or height or both will be equal to target size; depends on
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* {@linkplain android.widget.ImageView.ScaleType ImageView's scale type}). Use it if memory economy is critically
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* important.<br />
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* <b>Note:</b> If original image size is smaller than target size then original image <b>will be stretched</b> to
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* target size.<br />
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* <br />
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* <b>NOTE:</b> For creating result Bitmap (of exact size) additional Bitmap will be created with
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* {@link android.graphics.Bitmap#createBitmap(android.graphics.Bitmap, int, int, int, int, android.graphics.Matrix, boolean)
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* Bitmap.createBitmap(...)}.<br />
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* <b>Cons:</b> Saves memory by keeping smaller Bitmap in memory cache (comparing with IN_SAMPLE... scale types)<br />
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* <b>Pros:</b> Requires more memory in one time for creation of result Bitmap.
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*/
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EXACTLY_STRETCHED
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}
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