WebPDecoder class

Decode a WebP formatted image. This supports lossless (vp8l), lossy (vp8), lossy+alpha, and animated WebP images.

Inheritance

Constructors

WebPDecoder([List<int> bytes])

Properties

hashCode int
The hash code for this object. [...]
read-only, inherited
info WebPInfo
read-only
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

decodeAnimation(List<int> bytes) Animation
Decode all of the frames of an animated webp. For single image webps, this will return an animation with a single frame.
override
decodeFrame(int frame) Image
Decode a single frame from the data that was set with startDecode. If frame is out of the range of available frames, null is returned. Non animated image files will only have frame 0. An Image is returned, which provides the image, and top-left coordinates of the image, as animated frames may only occupy a subset of the canvas.
override
decodeHdrFrame(int frame) HdrImage
Decode a single high dynamic range (HDR) frame from the data that was set with startDecode. If the format of the file does not support HDR images, the regular image will be converted to an HDR image as (color / 255). If frame is out of the range of available frames, null is returned. Non animated image files will only have frame 0. An Image is returned, which provides the image, and top-left coordinates of the image, as animated frames may only occupy a subset of the canvas.
inherited
decodeHdrImage(List<int> bytes, {int frame: 0}) HdrImage
Decode the file and extract a single High Dynamic Range (HDR) image from it. HDR images are stored in floating-poing values. If the format of the file does not support HDR images, the regular image will be converted to an HDR image as (color / 255). If the file is animated, the specified frame will be decoded. If there was a problem decoding the file, null is returned.
inherited
decodeImage(List<int> bytes, {int frame: 0}) Image
Decode a WebP formatted file stored in bytes into an Image. If it's not a valid webp file, null is returned. If the webp file stores animated frames, only the first image will be returned. Use decodeAnimation to decode the full animation.
override
isValidFile(List<int> bytes) bool
Is the given file a valid WebP image?
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
numFrames() int
How many frames are available to decode? [...]
override
startDecode(List<int> bytes) WebPInfo
Validate the file is a WebP image and get information about it. If the file is not a valid WebP image, null is returned.
override
toString() String
Returns a string representation of this object.
inherited

Operators

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