public abstract class

DefaultDecoder

extends Object
implements PlatformDecoder
java.lang.Object
   ↳ com.facebook.imagepipeline.platform.DefaultDecoder
Known Direct Subclasses

Class Overview

Bitmap decoder for ART VM (Lollipop and up).

Summary

Public Constructors
DefaultDecoder(BitmapPool bitmapPool, int maxNumThreads, SynchronizedPool decodeBuffers)
Public Methods
CloseableReference<Bitmap> decodeFromEncodedImage(EncodedImage encodedImage, Bitmap.Config bitmapConfig, Rect regionToDecode)
Creates a bitmap from encoded bytes.
CloseableReference<Bitmap> decodeFromEncodedImageWithColorSpace(EncodedImage encodedImage, Bitmap.Config bitmapConfig, Rect regionToDecode, boolean transformToSRGB)
Creates a bitmap from encoded bytes.
CloseableReference<Bitmap> decodeJPEGFromEncodedImage(EncodedImage encodedImage, Bitmap.Config bitmapConfig, Rect regionToDecode, int length)
Creates a bitmap from encoded JPEG bytes.
CloseableReference<Bitmap> decodeJPEGFromEncodedImageWithColorSpace(EncodedImage encodedImage, Bitmap.Config bitmapConfig, Rect regionToDecode, int length, boolean transformToSRGB)
Creates a bitmap from encoded JPEG bytes.
abstract int getBitmapSize(int width, int height, BitmapFactory.Options options)
Protected Methods
CloseableReference<Bitmap> decodeStaticImageFromStream(InputStream inputStream, BitmapFactory.Options options, Rect regionToDecode)
This method is needed because of dependency issues.
[Expand]
Inherited Methods
From class java.lang.Object
From interface com.facebook.imagepipeline.platform.PlatformDecoder

Public Constructors

public DefaultDecoder (BitmapPool bitmapPool, int maxNumThreads, SynchronizedPool decodeBuffers)

Public Methods

public CloseableReference<Bitmap> decodeFromEncodedImage (EncodedImage encodedImage, Bitmap.Config bitmapConfig, Rect regionToDecode)

Creates a bitmap from encoded bytes. Supports JPEG but callers should use decodeJPEGFromEncodedImage(EncodedImage, Bitmap.Config, Rect, int) for partial JPEGs. In addition, a region to decode can be supplied in order to minimize memory usage. NOTE: Not all platform decoders necessarily support supplying specific regions.

Note: This needs to be kept because of dependencies issues.

Parameters
encodedImage the reference to the encoded image with the reference to the encoded bytes
bitmapConfig the android.graphics.Bitmap.Config used to create the decoded Bitmap
regionToDecode optional image region to decode or null to decode the whole image
Returns
  • the bitmap

public CloseableReference<Bitmap> decodeFromEncodedImageWithColorSpace (EncodedImage encodedImage, Bitmap.Config bitmapConfig, Rect regionToDecode, boolean transformToSRGB)

Creates a bitmap from encoded bytes.

Parameters
encodedImage the encoded image with a reference to the encoded bytes
bitmapConfig the android.graphics.Bitmap.Config used to create the decoded Bitmap
regionToDecode optional image region to decode or null to decode the whole image
transformToSRGB whether to allow color space transformation to sRGB at load time
Returns
  • the bitmap
Throws
OutOfMemoryError if the Bitmap cannot be allocated

public CloseableReference<Bitmap> decodeJPEGFromEncodedImage (EncodedImage encodedImage, Bitmap.Config bitmapConfig, Rect regionToDecode, int length)

Creates a bitmap from encoded JPEG bytes. Supports a partial JPEG image. In addition, a region to decode can be supplied in order to minimize memory usage. NOTE: Not all platform decoders necessarily support supplying specific regions.

Note: This needs to be kept because of dependencies issues.

Parameters
encodedImage the reference to the encoded image with the reference to the encoded bytes
bitmapConfig the android.graphics.Bitmap.Config used to create the decoded Bitmap
regionToDecode optional image region to decode or null to decode the whole image.
length the number of encoded bytes in the buffer
Returns
  • the bitmap

public CloseableReference<Bitmap> decodeJPEGFromEncodedImageWithColorSpace (EncodedImage encodedImage, Bitmap.Config bitmapConfig, Rect regionToDecode, int length, boolean transformToSRGB)

Creates a bitmap from encoded JPEG bytes. Supports a partial JPEG image.

Parameters
encodedImage the encoded image with reference to the encoded bytes
bitmapConfig the android.graphics.Bitmap.Config used to create the decoded Bitmap
regionToDecode optional image region to decode or null to decode the whole image
length the number of encoded bytes in the buffer
transformToSRGB whether to allow color space transformation to sRGB at load time
Returns
  • the bitmap
Throws
OutOfMemoryError if the Bitmap cannot be allocated

public abstract int getBitmapSize (int width, int height, BitmapFactory.Options options)

Protected Methods

protected CloseableReference<Bitmap> decodeStaticImageFromStream (InputStream inputStream, BitmapFactory.Options options, Rect regionToDecode)

This method is needed because of dependency issues.

Parameters
inputStream the InputStream
options the android.graphics.BitmapFactory.Options used to decode the stream
regionToDecode optional image region to decode or null to decode the whole image
Returns
  • the bitmap