pixi.js/lib/advanced-blend-modes/HardLightBlend.js

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'use strict';

var Extensions = require('../extensions/Extensions.js');
var BlendModeFilter = require('../filters/blend-modes/BlendModeFilter.js');

"use strict";
class HardLightBlend extends BlendModeFilter.BlendModeFilter {
  constructor() {
    super({
      gl: {
        functions: `
                float hardLight(float base, float blend)
                {
                    return (blend < 0.5) ? 2.0 * base * blend : 1.0 - 2.0 * (1.0 - base) * (1.0 - blend);
                }

                vec3 blendHardLight(vec3 base, vec3 blend, float opacity)
                {
                    vec3 blended = vec3(
                        hardLight(base.r, blend.r),
                        hardLight(base.g, blend.g),
                        hardLight(base.b, blend.b)
                    );

                    return (blended * opacity + base * (1.0 - opacity));
                }
            `,
        main: `
                finalColor = vec4(blendHardLight(back.rgb, front.rgb,front.a), blendedAlpha) * uBlend;
            `
      },
      gpu: {
        functions: `
                fn hardLight(base: f32, blend: f32) -> f32
                {
                    return select(1.0 - 2.0 * (1.0 - base) * (1.0 - blend), 2.0 * base * blend, blend < 0.5);
                }

                fn blendHardLight(base: vec3<f32>, blend: vec3<f32>, opacity: f32) -> vec3<f32>
                {
                    let blended = vec3<f32>(
                        hardLight(base.r, blend.r),
                        hardLight(base.g, blend.g),
                        hardLight(base.b, blend.b)
                    );
                    return (blended * opacity + base * (1.0 - opacity));
                }
                `,
        main: `
                out = vec4<f32>(blendHardLight(back.rgb, front.rgb, front.a), blendedAlpha) * blendUniforms.uBlend;
                `
      }
    });
  }
}
/** @ignore */
HardLightBlend.extension = {
  name: "hard-light",
  type: Extensions.ExtensionType.BlendMode
};

exports.HardLightBlend = HardLightBlend;
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