@absulit/points/src/core/RenderPasses/bloom/frag.js

A Generative Art library made in WebGPU

import { bloom, brightness } from '../../color.js';
import { PI } from '../../math.js';
import { texturePosition } from '../../image.js';
const frag = /*wgsl*/`

${texturePosition}
${bloom}
${brightness}
${PI}

@fragment
fn main(
    @location(0) color: vec4f,
    @location(1) uv: vec2f,
    @location(2) ratio: vec2f,  // relation between params.screen.x and params.screen.y
    @location(3) uvr: vec2f,    // uv with aspect ratio corrected
    @location(4) mouse: vec2f,
    @builtin(position) position: vec4f
) -> @location(0) vec4f {

    let startPosition = vec2(0.,0.);
    let rgbaImage = texturePosition(renderpass_feedbackTexture, renderpass_feedbackSampler, startPosition, uvr, false); //* .998046;

    let input = brightness(rgbaImage);
    let bloomVal = bloom(input, i32(params.bloom_iterations), params.bloom_amount);
    let rgbaBloom = vec4(bloomVal);

    let finalColor:vec4f = rgbaImage + rgbaBloom;

    return finalColor;
}
`;

export default frag;