LayerImage.cs

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using UnityEngine;
using UnityEngine.UI;
 
public class LayerImage : ELayer
{
    public Image image;
 
    public Vector2 margin;
 
    private float zoom = 1f;
 
    public void SetImage(Sprite sprite)
    {
        image.sprite = sprite;
        image.SetNativeSize();
        float num = ((float)Screen.height - margin.y) / ELayer.core.uiScale;
        RectTransform rectTransform = image.rectTransform;
        float num2 = rectTransform.sizeDelta.y;
        if (num2 > num)
        {
            num2 = num;
        }
        rectTransform.sizeDelta = new Vector2(rectTransform.sizeDelta.x, num2);
        Zoom(0f);
    }
 
    public override void OnUpdateInput()
    {
        if (EInput.wheel != 0)
        {
            Zoom((EInput.wheel > 0) ? 0.25f : (-0.25f));
        }
        if (EInput.middleMouse.clicked)
        {
            image.SetNativeSize();
            zoom = 1f;
            Zoom(0f);
        }
    }
 
    public void Zoom(float a)
    {
        zoom += a;
        if (zoom < 0.5f)
        {
            zoom = 0.5f;
        }
        if (zoom > 2f)
        {
            zoom = 2f;
        }
        image.rectTransform.localScale = new Vector3(zoom, zoom, zoom);
    }
 
    public override void OnKill()
    {
        EInput.Consume(2);
    }
}