fr = `uniform sampler2D aTex;
uniform sampler2D bTex;
uniform float mixVal;
varying vec2 vTextureCoord;

vec4 getColorAtProgress(float progress) {
    float smoothedProgress = progress * progress * progress;
    float zoom = 1. + smoothedProgress * 3.;
    return texture2D(aTex, (vTextureCoord - vec2(0.5)) / zoom + vec2(0.5));
}

const int sampleCount = 20;
const float blurAmount = 0.2;

void main() {
    vec4 accumulatedColor = vec4(0.);
    float accumulateCount = 0.;
    for (int i = 0; i < sampleCount; i++) {
        float sampleIndex = float(i) / float(sampleCount);
        float progressNeg = sampleIndex * blurAmount;
        float progress = max(0., mixVal - progressNeg);
        float mult = max(0., 1. - abs(2. * sampleIndex - 1.));
        accumulatedColor += getColorAtProgress(progress) * mult;
        accumulateCount += mult;
    }

    vec4 aColor = accumulatedColor / accumulateCount;
    vec4 bColor = texture2D(bTex, vTextureCoord);

    float mixAmount = smoothstep(0.8, 1., mixVal);
    gl_FragColor = mix(aColor, bColor, mixAmount);
}`;

ff = new PIXI.Filter(null, fr, {
    aText: cr.sprites[0].texture.baseTexture,
    mixVal: .5,
    bText: cr.sprites[0].texture.baseTexture,
})

cr.container.filters = [ff];
cr.updateCanvas();