React Native Skia高性能 React Native 图形库

React Native Skia 是高性能的 2D 图形库，将 Skia 项目带到了 React Native 平台。Skia 是 Chrome、Chrome OS、Android、Flutter、Mozilla Firefox 和 Firefox OS 以及许多其他产品使用的图形引擎。

示例

声明式 API

import {Canvas, Circle, Group} from "@shopify/react-native-skia";

export const HelloWorld = () => {
  const width = 256;
  const height = 256;
  const r = 215;
  return (
    <Canvas style={{ flex: 1 }}>
      <Group blendMode="multiply">
        <Circle cx={r} cy={r} r={r} color="cyan" />
        <Circle cx={width - r} cy={r} r={r} color="magenta" />
        <Circle
          cx={width/2}
          cy={height - r}
          r={r}
          color="yellow"
        />
      </Group>
    </Canvas>
  );
};

命令式 API

import {Skia, BlendMode, SkiaView, useDrawCallback} from "@shopify/react-native-skia";

const paint = Skia.Paint();
paint.setAntiAlias(true);
paint.setBlendMode(BlendMode.Multiply);

export const HelloWorld = () => {
  const width = 256;
  const height = 256;
  const r = 215;
  const onDraw = useDrawCallback((canvas) => {
    // Cyan Circle
    const cyan = paint.copy();
    cyan.setColor(Skia.Color("cyan"));
    canvas.drawCircle(r, r, r, cyan);
    // Magenta Circle
    const magenta = paint.copy();
    magenta.setColor(Skia.Color("magenta"));
    canvas.drawCircle(width - r, r, r, magenta);
    // Yellow Circle
    const yellow = paint.copy();
    yellow.setColor(Skia.Color("yellow"));
    canvas.drawCircle(width/2, height - r, r, yellow);
  });
  return (
    <SkiaView style={{ flex: 1 }} onDraw={onDraw} />
  );
};