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SoftMaskForUGUI

UI Soft Mask is a smooth masking component for Unity UI (uGUI) elements.

Description

By using SoftMask instead of the default Mask component, you can beautifully represent the rounded edges of UI elements.

Features

SoftMask is compatible with Mask.
You can adjust the visible part.
Text, Image, RawImage can be used as a masking.
Support multiple-sprites and SpriteAtlas.
Support up to 4 nested soft masks.
Support scroll view.
Support inversed soft mask.
Support overlay, camera space and world space.
(Option) Raycast is filtered only for the visible part.
Contain soft maskable UI shader.
Support soft masks in your custom shaders by adding just 3 lines. For details, please see Development Note.
Adjust soft mask buffer size to improve performance.
Convert existing Mask to SoftMask from context menu.
Render the soft mask buffer only when needed to improve performance.
Add a SoftMaskable component to the child UI elements of SoftMask from the inspector.
Preview soft mask buffer in inspector.
Make multiple holes on one background by 'Parts of parent' option.
Support TextMeshPro

Components

Component	Description	Screenshot
SoftMask	Use instead of Mask for smooth masking. Show Mask Graphic: Show the graphic that is associated with the Mask render area. Desampling Rate: The desampling rate for soft mask buffer. The larger the value, the better the performance but the lower the quality. Softness: The value used by the soft mask to select the area of influence defined over the soft mask's graphic. Ignore Parent: Should the soft mask ignore parent soft masks? Part Of Parent: Is the soft mask a part of parent soft mask?
SoftMaskable	Add this component to Graphic under SoftMask for smooth masking. Use Stencil: Use stencil buffer to mask. If disabled, the stencil buffer is ignored. RaycastFilter: Use soft-masked raycast target. This option is expensive. Mask Interaction: The interaction for each mask layers.

Demo

WebGL Demo

Installation

Requirement

Unity 2017.1 or later (2018.x, 2019.x and 2020.x are included)
No other SDK are required

Using OpenUPM (for Unity 2018.3 or later)

This package is available on OpenUPM. You can install it via openupm-cli.

openupm add com.coffee.softmask-for-ugui

Using Git (for Unity 2018.3 or later)

Find the manifest.json file in the Packages folder of your project and edit it to look like this:

{
  "dependencies": {
    "com.coffee.softmask-for-ugui": "https://github.com/mob-sakai/SoftMaskForUGUI.git",
    ...
  },
}

To update the package, change suffix #{version} to the target version.

e.g. "com.coffee.softmask-for-ugui": "https://github.com/mob-sakai/SoftMaskForUGUI.git#1.0.0",

Or, use UpmGitExtension to install and update the package.

For Unity 2018.2 or earlier

Download a source code zip file from Releases page
Extract it
Import it into the following directory in your Unity project
- Packages (It works as an embedded package. For Unity 2018.1 or later)
- Assets (Legacy way. For Unity 2017.1 or later)

How to play demo

For Unity 2019.1 or later
- Open Package Manager window and select UI Soft Mask package in package list and click Demo > Import in project button
For Unity 2018.4 or earlier
- Click Assets/Samples/UISoftMask/Import Demo from menu

The assets will be imported into Assets/Samples/UI Soft Mask/{version}/Demo.
Open UISoftMask_Demo scene and play it.

Usage

Add a SoftMask component instead of Mask component.
Or, convert an existing Mask component to SoftMask component from the context menu.
Add a SoftMaskable components to the child UI elements of the SoftMask component.

Or, add a SoftMaskable components from the inspector of the SoftMask component.
Adjust softness setting of SoftMask.
Enjoy!

Support TextMeshPro

To use SoftMask with TextMeshPro, import a sample asset.

For Unity 2019.1 or later
- Open Package Manager window and select UI Soft Mask package in package list and click TextMeshPro Support > Import in project button
For Unity 2018.4 or earlier
- Click Assets/Samples/UISoftMask/Import TextMeshPro Support from menu

The assets will be imported into Assets/Samples/UI Soft Mask/{version}/TextMeshPro Support.

NOTE: You must import TMP Essential Resources before using. They include shaders, fonts, etc.

NOTE: If the shader error is not resolved, reimport the shader. Or, import the TextMeshPro Support again.

Support soft masks with your custom shaders

Only a few steps are needed to support soft mask in your custom shaders!

Duplicate your shader file and add the (SoftMaskable) suffix to the file name.

Your_Custom_Shader.shader
-> Your_Custom_Shader (SoftMaskable).shader

Modify the shader name (defined at the beginning of the shader file) as follows:

Add Hidden/ prefix
Add (SoftMaskable) suffix

Shader "UI/Your_Custom_Shader"
-> Shader "Hidden/UI/Your_Custom_Shader (SoftMaskable)"

Add #pragma and #include directives, where SOFTMASK_EDITOR is an editor-only keyword and is not included in the build. If you didn't use package manager to install, include SoftMask.cginc in the appropriate path instead.

#include "Packages/com.coffee.softmask-for-ugui/Shaders/SoftMask.cginc"
#pragma shader_feature __ SOFTMASK_EDITOR

Apply a soft mask in the fragment shader.
This operation determines the final alpha according to the soft mask buffer.

IN.vertex: the clip position
IN.worldPosition: the world position

color.a *= SoftMask(IN.vertex, IN.worldPosition);

As an example of implementation, please see UI-Default-SoftMask.shader.

Contributing

Issues

Issues are very valuable to this project.

Ideas are a valuable source of contributions others can make
Problems show where this project is lacking
With a question you show where contributors can improve the user experience

Pull Requests

Pull requests are, a great way to get your ideas into this repository.
See CONTRIBUTING.md.

Support

This is an open source project that I am developing in my spare time.
If you like it, please support me.
With your support, I can spend more time on development. :)

License

Author

mob-sakai

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