BlurhashFfiBindings class

Bindings for src/blurhash_ffi.h.

Regenerate bindings with flutter pub run ffigen --config ffigen.yaml.

Constructors

BlurhashFfiBindings(DynamicLibrary dynamicLibrary)

The symbols are looked up in dynamicLibrary.

BlurhashFfiBindings.fromLookup(Pointer<T> lookup<T extends NativeType>(String symbolName))

The symbols are looked up with lookup.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

blurHashForPixels(int xComponents, int yComponents, int width, int height, Pointer<Uint8> rgb, int bytesPerRow) → Pointer<Char>

encode : Returns the blurhash string for the given image This function returns a string containing the BlurHash. This memory is managed by the function, and you should not free it. It will be overwritten on the next call into the function, so be careful! Parameters : xComponents - The number of components in the X direction. Must be between 1 and 9. 3 to 5 is usually a good range for this. yComponents - The number of components in the Y direction. Must be between 1 and 9. 3 to 5 is usually a good range for this. width - The width in pixels of the supplied image. height - The height in pixels of the supplied image. rgb - A pointer to the pixel data. This is supplied in RGBA format, with 4 bytes per pixels. bytesPerRow - The number of bytes per row of the RGB pixel data.

decode(Pointer<Char> blurhash, int width, int height, int punch, int nChannels) → Pointer<Uint8>

decode : Returns the pixel array of the result image given the blurhash string, Parameters : blurhash : A string representing the blurhash to be decoded. width : Width of the resulting image height : Height of the resulting image punch : The factor to improve the contrast, default = 1 nChannels : Number of channels in the resulting image array, 3 = RGB, 4 = RGBA Returns : A pointer to memory region where pixels are stored in (H, W, C) format

decodeToArray(Pointer<Char> blurhash, int width, int height, int punch, int nChannels, Pointer<Uint8> pixelArray) → int

decodeToArray : Decodes the blurhash and copies the pixels to pixelArray, This method is suggested if you use an external memory allocator for pixelArray. pixelArray should be of size : width * height * nChannels Parameters : blurhash : A string representing the blurhash to be decoded. width : Width of the resulting image height : Height of the resulting image punch : The factor to improve the contrast, default = 1 nChannels : Number of channels in the resulting image array, 3 = RGB, 4 = RGBA pixelArray : Pointer to memory region where pixels needs to be copied. Returns : int, -1 if error 0 if successful

freePixelArray(Pointer<Uint8> pixelArray) → void

freePixelArray : Frees the pixel array Parameters : pixelArray : Pixel array pointer which will be freed. Returns : void (None)

isValidBlurhash(Pointer<Char> blurhash) → bool

isValidBlurhash : Checks if the Blurhash is valid or not. Parameters : blurhash : A string representing the blurhash Returns : bool (true if it is a valid blurhash, else false)

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited