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Painting Properties

Below are the properties of a Paint component. The following children can also be assigned to a Paint:

color​

Sets the alpha and RGB used when stroking and filling. The color is a string or a number. Any valid CSS color value is supported.

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

<>
  <Group color="red">
    <Circle c={vec(0, 0)} r={100} />
  </Group>
  {/* 0xffff0000 is also red (format is argb) */}
  <Group color={0xffff0000}>
    <Circle c={vec(0, 0)} r={50} />
  </Group>
  {/* Any CSS color is valid */}
  <Group color="hsl(120, 100%, 50%)">
    <Circle c={vec(0, 0)} r={50} />
  </Group>
</>

opacity​

Replaces alpha, leaving RGBA unchanged. 0 means fully transparent, 1.0 means opaque. When setting opacity in a Group component, the alpha component of all descending colors will inherit that value.

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

const width = 256;
const height = 256;
const strokeWidth = 30;
const r = width / 2 - strokeWidth / 2;
const c = vec(width / 2, height / 2);

export const OpacityDemo = () => {
  return (
    <Canvas style={{ width, height }}>
      <Group opacity={0.5}>
        <Circle c={c} r={r} color="red" />
        <Circle
          c={c}
          r={r}
          color="lightblue"
          style="stroke"
          strokeWidth={strokeWidth}
        />
        <Circle
          c={c}
          r={r}
          color="mint"
          style="stroke"
          strokeWidth={strokeWidth / 2}
        />
      </Group>
    </Canvas>
  );
};
Paint Opacity

blendMode​

Sets the blend mode that is, the mode used to combine source color with destination color. The following values are available: clear, src, dst, srcOver, dstOver, srcIn, dstIn, srcOut, dstOut, srcATop, dstATop, xor, plus, modulate, screen, overlay, darken, lighten, colorDodge, colorBurn, hardLight, softLight, difference, exclusion, multiply, hue, saturation, color, luminosity, plusDarker, and plusLighter.

style​

The paint style can be fill (default) or stroke.

strokeWidth​

Thickness of the pen used to outline the shape.

strokeJoin​

Sets the geometry drawn at the corners of strokes. Values can be bevel, miter, or round.

strokeCap​

Returns the geometry drawn at the beginning and end of strokes. Values can be butt, round, or square.

strokeMiter​

Limit at which a sharp corner is drawn beveled.

antiAlias​

Requests, but does not require, that edge pixels draw opaque or with partial transparency.

dither​

Requests, but does not require, to distribute color error.