ResizeImage class

Instructs Flutter to decode the image at the specified dimensions instead of at its native size.

This allows finer control of the size of the image in ImageCache and is generally used to reduce the memory footprint of ImageCache.

The decoded image may still be displayed at sizes other than the cached size provided here.

Inheritance

Constructors

ResizeImage(ImageProvider imageProvider, {int width, int height, bool allowUpscaling: false})
Creates an ImageProvider that decodes the image to the specified size. [...]
const

Properties

allowUpscaling bool
Whether the width and height parameters should be clamped to the intrinsic width and height of the image. [...]
final
hashCode int
The hash code for this object. [...]
read-only, inherited
height int
The height the image should decode to and cache.
final
imageProvider ImageProvider
The ImageProvider that this class wraps.
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
width int
The width the image should decode to and cache.
final

Methods

createStream(ImageConfiguration configuration) ImageStream
Called by resolve to create the ImageStream it returns. [...]
@protected, inherited
evict({ImageCache cache, ImageConfiguration configuration: ImageConfiguration.empty}) Future<bool>
Evicts an entry from the image cache. [...]
inherited
load(_SizeAwareCacheKey key, DecoderCallback decode) ImageStreamCompleter
Converts a key into an ImageStreamCompleter, and begins fetching the image. [...]
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
obtainCacheStatus({ImageConfiguration configuration, ImageErrorListener handleError}) Future<ImageCacheStatus>
Returns the cache location for the key that this ImageProvider creates. [...]
inherited
obtainKey(ImageConfiguration configuration) Future<_SizeAwareCacheKey>
Converts an ImageProvider's settings plus an ImageConfiguration to a key that describes the precise image to load. [...]
override
resolve(ImageConfiguration configuration) ImageStream
Resolves this image provider using the given configuration, returning an ImageStream. [...]
@nonVirtual, inherited
resolveStreamForKey(ImageConfiguration configuration, ImageStream stream, _SizeAwareCacheKey key, ImageErrorListener handleError) → void
Called by resolve with the key returned by obtainKey. [...]
@protected, inherited
toString() String
Returns a string representation of this object.
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
inherited

Static Methods

resizeIfNeeded(int cacheWidth, int cacheHeight, ImageProvider provider) ImageProvider
Composes the provider in a ResizeImage only when cacheWidth and cacheHeight are not both null. [...]