RoApp/Assets/Src/WebView/Scripts/Common/CanvasViewportMaterialView.cs

/**
* Copyright (c) 2021 Vuplex Inc. All rights reserved.
*
* Licensed under the Vuplex Commercial Software Library License, you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
*     https://vuplex.com/commercial-library-license
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using UnityEngine;
using UnityEngine.UI;

namespace Vuplex.WebView {

    public class CanvasViewportMaterialView : ViewportMaterialView {

        public override Material Material {
            get {
                return GetComponent<RawImage>().material;
            }
            set {
                GetComponent<RawImage>().material = value;
            }
        }

        public override Texture2D Texture {
            get {
                return (Texture2D) GetComponent<RawImage>().material.mainTexture;
            }
            set {
                GetComponent<RawImage>().material.mainTexture = value;
            }
        }

        public override bool Visible {
            get {
                return GetComponent<RawImage>().enabled;
            }
            set {
                GetComponent<RawImage>().enabled = value;
            }
        }

        public override void SetCropRect(Rect rect) {

            GetComponent<RawImage>().material.SetVector("_CropRect", _rectToVector(rect));
        }

        public override void SetCutoutRect(Rect rect) {

            var rectVector = _rectToVector(rect);
            if (rect != new Rect(0, 0, 1, 1)) {
                // Make the actual cutout slightly smaller (2% shorter and 2% skinnier) so that
                // the gap between the video layer and the viewport isn't visible.
                // This is only done if the rect doesn't cover the entire view, because
                // the Keyboard component uses a rect cutout of the entire view for Android Gecko.
                var onePercentOfWidth = rect.width * 0.01f;
                var onePercentOfHeight = rect.height * 0.01f;
                rectVector = new Vector4(
                    rectVector.x + onePercentOfWidth,
                    rectVector.y + onePercentOfHeight,
                    rectVector.z - 2 * onePercentOfWidth,
                    rectVector.w - 2 * onePercentOfHeight
                );
            }
            GetComponent<RawImage>().material.SetVector("_VideoCutoutRect", rectVector);
        }

        Vector4 _rectToVector(Rect rect) {

            return new Vector4(rect.x, rect.y, rect.width, rect.height);
        }
    }
}