react-native-gif-controller-view

screencap-2023-08-20T050445.626Z.mp4

Overview

GifControllerView is a component designed for advanced control and manipulation of GIF images in React Native applications. This component offers properties to modify GIF presentation styles, animation controls, and color mappings. Moreover, using the reference methods (GifControllerViewRef), developers can fetch detailed color statistics and frame-specific data for any GIF.

Installation

Make sure you've already set up React Native in your project. Then, install the GifControllerView component:

npm install react-native-gif-controller-view

Usage

Props

source (ImageSourcePropType)

The GIF image source.

style (StyleProp<ImageStyle>)

Styles the GifControllerView. This prop accepts all standard React Native ImageStyle properties.

colorMappings (Array of { from: string; to: string })

An array that defines the color transformation mappings. Each mapping transforms a color from a specified value to another value.

Example:

colorMappings={[
  { from: "#FFFFFF", to: "#000000" },
  // This mapping transforms all white colors in the GIF to black.
]}

isAnimating (boolean)

Controls the GIF's animation state. If true, the GIF animates. If false, it pauses.

isReverse (boolean)

If set to true, the GIF animates in reverse. If false, it animates normally.

speed (number)

Determines the GIF's playback speed. A value of 1 is the default speed, 2 would be twice as fast, and so on.

disableLoop (boolean)

Controls whether the GIF animation should loop or not. If set to true, the GIF will play only once and stop at the last frame. If false, the GIF will loop continuously.

Ref Methods

Using React's ref, you can access the following methods:

getAllColorCount(index: number)

Returns a promise that resolves to an array containing the count of all colors in a specified frame. Each entry in the array includes the color and its count.

Example:

const ref = useRef();

// ... Somewhere in your code:
const colorData = await ref.current?.getAllColorCount(0);

seekTo(index: number)

Navigates to a specified frame index in the GIF.

Example:

const ref = useRef();

// ... Somewhere in your code:
ref.current?.seekTo(5); // Jumps to the 6th frame (0-indexed).

getFrameData()

Returns a promise that resolves to an array containing data about each frame. Each entry in the array includes the delayTime (time delay before the next frame) and frameIndex (index of the frame).

Example:

const ref = useRef();

// ... Somewhere in your code:
const frameData = await ref.current?.getFrameData();

Example

import GifControllerView from 'react-native-gif-controller-view';

// In your render:
<GifControllerView
  source={require('./path_to_your_gif.gif')}
  style={{ width: 100, height: 100 }}
  colorMappings={[{ from: '#FFFFFF', to: '#000000' }]}
  isAnimating={true}
  isReverse={false}
  speed={1}
  ref={yourRef}
/>;

Contributing

See the contributing guide to learn how to contribute to the repository and the development workflow.

License

MIT

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Made with create-react-native-library