66 lines
1.7 KiB
C#
66 lines
1.7 KiB
C#
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.UI;
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namespace BITKit.UX
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{
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/// <summary>
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/// Created by Vitens on 2020/12/11 20:48:35
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///
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/// Description :
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/// 全屏背景图片等比例拉伸自适应
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/// </summary>
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[ExecuteInEditMode]
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public class UGUIBackgroundImageScaler : MonoBehaviour
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{
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//图片原大小(压缩前的)
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[SerializeField] private Vector2 textureOriginSize = new Vector2(2048, 1024);
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// Start is called before the first frame update
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private void Start()
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{
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Scaler();
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}
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//适配
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private void Scaler()
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{
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//当前画布尺寸
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Vector2 canvasSize = gameObject.GetComponentInParent<Canvas>().GetComponent<RectTransform>().sizeDelta;
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//当前画布尺寸长宽比
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float screenxyRate = canvasSize.x / canvasSize.y;
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//图片尺寸 这个得到的结果是 (0,0) ?
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//Vector2 bgSize = bg.mainTexture.texelSize;
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Vector2 bgSize = textureOriginSize;
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//视频尺寸长宽比
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float texturexyRate = bgSize.x / bgSize.y;
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RectTransform rt = (RectTransform)transform;
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//视频x偏长,需要适配y（下面的判断 '>' 改为 '<' 就是视频播放器的视频方式）
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if (texturexyRate > screenxyRate)
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{
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int newSizeY = Mathf.CeilToInt(canvasSize.y);
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int newSizeX = Mathf.CeilToInt((float)newSizeY / bgSize.y * bgSize.x);
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rt.sizeDelta = new Vector2(newSizeX, newSizeY);
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}
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else
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{
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int newVideoSizeX = Mathf.CeilToInt(canvasSize.x);
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int newVideoSizeY = Mathf.CeilToInt((float)newVideoSizeX / bgSize.x * bgSize.y);
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rt.sizeDelta = new Vector2(newVideoSizeX, newVideoSizeY);
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}
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}
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private void Update()
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{
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#if UNITY_EDITOR
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//editor模式下测试用
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Scaler();
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#endif
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}
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}
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}
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