# Crok_highpass_GL

GPU accelerated highpass filter for Shadertoy.

### INPUT(S)
* Source : Connect the image you want to apply the effect onto. (RGBA)

### HOW TO USE IT

#### Setup

* Contrast : Adjust contrast.
* Saturation : Adjust saturation

* Clamp values : Clamp values above 1.
* Comp on bg : Comp resulting effect on original image.

#### Options

* Source is premultiplied : Checked if source image is premultiplied.

#### Mask

* Use mak : Use mask input.
* Invert mask : Invert input mask.
* Channel : Channel used as mask.

#### Mix

* Mix : Mix result with original image.

### OUTPUT
* RGBA