public class

DownsampleUtil

extends Object
java.lang.Object
   ↳ com.facebook.imagepipeline.transcoder.DownsampleUtil

Summary

Constants
int DEFAULT_SAMPLE_SIZE
Public Methods
static float determineDownsampleRatio(RotationOptions rotationOptions, ResizeOptions resizeOptions, EncodedImage encodedImage)
static int determineSampleSize(RotationOptions rotationOptions, ResizeOptions resizeOptions, EncodedImage encodedImage, int maxBitmapSize)
Get the factor between the dimensions of the encodedImage (actual image) and the ones of the imageRequest (requested size).
static int ratioToSampleSize(float ratio)
static int ratioToSampleSizeJPEG(float ratio)
static int roundToPowerOfTwo(int sampleSize)
[Expand]
Inherited Methods
From class java.lang.Object

Constants

public static final int DEFAULT_SAMPLE_SIZE

Constant Value: 1 (0x00000001)

Public Methods

public static float determineDownsampleRatio (RotationOptions rotationOptions, ResizeOptions resizeOptions, EncodedImage encodedImage)

public static int determineSampleSize (RotationOptions rotationOptions, ResizeOptions resizeOptions, EncodedImage encodedImage, int maxBitmapSize)

Get the factor between the dimensions of the encodedImage (actual image) and the ones of the imageRequest (requested size).

Parameters
rotationOptions the rotations options of the request
resizeOptions the resize options of the request
encodedImage the encoded image with the actual dimensions
maxBitmapSize the maximum supported bitmap size (in pixels) when not specified in the encoded image resizeOptions.

public static int ratioToSampleSize (float ratio)

public static int ratioToSampleSizeJPEG (float ratio)

public static int roundToPowerOfTwo (int sampleSize)