@lightningtv/renderer/dist/src/core/shaders/webgl/Rounded.js

Lightning 3 Renderer

import { calcFactoredRadiusArray } from '../../lib/utils.js';
import { RoundedTemplate, } from '../templates/RoundedTemplate.js';
/**
 * Similar to the {@link DefaultShader} but cuts out 4 rounded rectangle corners
 * as defined by the specified corner {@link RoundedProps.radius}
 */
export const Rounded = {
    props: RoundedTemplate.props,
    update(node) {
        this.uniform4fa('u_radius', calcFactoredRadiusArray(this.props.radius, node.width, node.height));
    },
    vertex: `
  # ifdef GL_FRAGMENT_PRECISION_HIGH
  precision highp float;
  # else
  precision mediump float;
  # endif

  attribute vec2 a_position;
  attribute vec2 a_textureCoords;
  attribute vec4 a_color;
  attribute vec2 a_nodeCoords;

  uniform vec2 u_resolution;
  uniform float u_pixelRatio;
  uniform vec2 u_dimensions;

  varying vec4 v_color;
  varying vec2 v_textureCoords;
  varying vec2 v_nodeCoords;

  void main() {
    vec2 normalized = a_position * u_pixelRatio;
    vec2 screenSpace = vec2(2.0 / u_resolution.x, -2.0 / u_resolution.y);

    v_color = a_color;
    v_nodeCoords = a_nodeCoords;
    v_textureCoords = a_textureCoords;

    gl_Position = vec4(normalized.x * screenSpace.x - 1.0, normalized.y * -abs(screenSpace.y) + 1.0, 0.0, 1.0);
    gl_Position.y = -sign(screenSpace.y) * gl_Position.y;
  }
`,
    fragment: `
    # ifdef GL_FRAGMENT_PRECISION_HIGH
    precision highp float;
    # else
    precision mediump float;
    # endif

    //renderer applies these uniforms automatically
    uniform vec2 u_resolution;
    uniform vec2 u_dimensions;
    uniform float u_alpha;
    uniform sampler2D u_texture;

    //custom uniforms
    uniform vec4 u_radius;

    varying vec4 v_color;
    varying vec2 v_textureCoords;
    varying vec2 v_nodeCoords;

    float roundedBox(vec2 p, vec2 s, vec4 r) {
      r.xy = (p.x > 0.0) ? r.yz : r.xw;
      r.x = (p.y > 0.0) ? r.y : r.x;
      vec2 q = abs(p) - s + r.x;
      return (min(max(q.x, q.y), 0.0) + length(max(q, 0.0))) - r.x;
    }

    void main() {
      vec4 color = texture2D(u_texture, v_textureCoords) * v_color;
      vec2 halfDimensions = (u_dimensions * 0.5);

      vec2 boxUv = v_nodeCoords.xy * u_dimensions - halfDimensions;
      float boxDist = roundedBox(boxUv, halfDimensions, u_radius);

      float roundedAlpha = 1.0 - smoothstep(0.0, 1.0, boxDist);

      vec4 resColor = vec4(0.0);
      resColor = mix(resColor, color, roundedAlpha);
      gl_FragColor = resColor * u_alpha;
    }
  `,
};
//# sourceMappingURL=Rounded.js.map