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

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'use strict';

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

"use strict";
class DivideBlend extends BlendModeFilter.BlendModeFilter {
  constructor() {
    super({
      gl: {
        functions: `
                float divide(float base, float blend)
                {
                    return (blend > 0.0) ? clamp(base / blend, 0.0, 1.0) : 1.0;
                }

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

                    return (blended * opacity + base * (1.0 - opacity));
                }
                `,
        main: `
                finalColor = vec4(blendDivide(back.rgb, front.rgb,front.a), blendedAlpha) * uBlend;
                `
      },
      gpu: {
        functions: `
                fn divide(base: f32, blend: f32) -> f32
                {
                    return select(1.0, clamp(base / blend, 0.0, 1.0), blend > 0.0);
                }

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

exports.DivideBlend = DivideBlend;
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