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63 lines (56 loc) • 2.01 kB
JavaScript
import { ExtensionType } from '../extensions/Extensions.mjs';
import { BlendModeFilter } from '../filters/blend-modes/BlendModeFilter.mjs';
"use strict";
class OverlayBlend extends BlendModeFilter {
constructor() {
super({
gl: {
functions: `
float overlay(float base, float blend)
{
return (base < 0.5) ? (2.0*base*blend) : (1.0-2.0*(1.0-base)*(1.0-blend));
}
vec3 blendOverlay(vec3 base, vec3 blend, float opacity)
{
vec3 blended = vec3(
overlay(base.r, blend.r),
overlay(base.g, blend.g),
overlay(base.b, blend.b)
);
return (blended * opacity + base * (1.0 - opacity));
}
`,
main: `
finalColor = vec4(blendOverlay(back.rgb, front.rgb,front.a), blendedAlpha) * uBlend;
`
},
gpu: {
functions: `
fn overlay(base: f32, blend: f32) -> f32
{
return select((1.0-2.0*(1.0-base)*(1.0-blend)), (2.0*base*blend), base < 0.5);
}
fn blendOverlay(base: vec3<f32>, blend: vec3<f32>, opacity: f32) -> vec3<f32>
{
let blended = vec3<f32>(
overlay(base.r, blend.r),
overlay(base.g, blend.g),
overlay(base.b, blend.b)
);
return (blended * opacity + base * (1.0 - opacity));
}
`,
main: `
out = vec4<f32>(blendOverlay(back.rgb, front.rgb, front.a), blendedAlpha) * blendUniforms.uBlend;
`
}
});
}
}
/** @ignore */
OverlayBlend.extension = {
name: "overlay",
type: ExtensionType.BlendMode
};
export { OverlayBlend };
//# sourceMappingURL=OverlayBlend.mjs.map