import { ExtensionType } from '../extensions/Extensions.mjs';
import { BlendModeFilter } from '../filters/blend-modes/BlendModeFilter.mjs';

"use strict";
class VividLightBlend extends BlendModeFilter {
  constructor() {
    super({
      gl: {
        functions: `
                float colorBurn(float base, float blend)
                {
                    return max((1.0-((1.0-base)/blend)),0.0);
                }

                float colorDodge(float base, float blend)
                {
                    return min(1.0, base / (1.0-blend));
                }

                float vividLight(float base, float blend)
                {
                    return (blend < 0.5) ? colorBurn(base,(2.0*blend)) : colorDodge(base,(2.0*(blend-0.5)));
                }

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

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

                fn colorDodge(base: f32, blend: f32) -> f32
                {
                    return min(1.0, base / (1.0-blend));
                }

                fn vividLight(base: f32, blend: f32) -> f32
                {
                    return select(colorDodge(base,(2.0*(blend-0.5))), colorBurn(base,(2.0*blend)), blend<0.5);
                }

                fn blendVividLight(base: vec3<f32>, blend: vec3<f32>, opacity: f32) -> vec3<f32>
                {
                    let blended: vec3<f32> = vec3<f32>(
                        vividLight(base.r, blend.r),
                        vividLight(base.g, blend.g),
                        vividLight(base.b, blend.b)
                    );

                    return (blended * opacity + base * (1.0 - opacity));
                }
                `,
        main: `
                out = vec4<f32>(blendVividLight(back.rgb, front.rgb, front.a), blendedAlpha) * blendUniforms.uBlend;
                `
      }
    });
  }
}
/** @ignore */
VividLightBlend.extension = {
  name: "vivid-light",
  type: ExtensionType.BlendMode
};

export { VividLightBlend };
//# sourceMappingURL=VividLightBlend.mjs.map