unity（WebGL） 截图拼接并保存本地，下载PDF

截图参考：Unity3D 局部截图、全屏截图、带UI截图三种方法_unity 截图_野区捕龙为宠的博客-CSDN博客

文档下载： Unity WebGL 生成doc保存到本地电脑_unity webgl 保存文件_野区捕龙为宠的博客-CSDN博客

中文输入：Unity WebGL中文输入 支持输入法跟随 支持全屏（内附Dome）_unity中文插件-CSDN博客 

1.调用代码

 private void Awake()
    {
//点击提交下载 按钮
        Btn_download.onClick.AddListener(() =>
        {
            Btn_download.gameObject.SetActive(value: false);

            GetComponent().Cap_LongTex();//截图拼图
//下载PDF
            GetComponent().CapCallBack = ((png_byte) =>
            {
                string filename = CQOOC.Instance.userName + "_" + DateTime.Now.ToString("g");
                Btn_download.gameObject.SetActive(true);
                Application.ExternalCall("downloadPng", png_byte, filename);//调用 webgl 方法

              //  Debug.Log("filename="+ filename);
            });
//上传 截图
            GetComponent().CapByteCallBack = ((png_byte) =>
            {
                string filename = CQOOC.Instance.userName + "_" + DateTime.Now.ToString("g");
                Debug.Log("filename=" + filename);
                //上传实验报告 截图
                CQOOC.Instance.UploadFile(png_byte, filename+".png", ((b) => {
                    if (b)
                    {
                        Debug.Log("上传截图成功！");
                    }
                    else
                    {
                        Debug.Log("上传截图失败！");
                    }
                }));

                //上传实验报告 数据
                CQOOC.Instance.UploadData_((b) => {
                    if (b)
                    {
                        UITipDialogMini.Instance.SetState(true, "提交数据成功！");
                    }
                    else
                    {
                        UITipDialogMini.Instance.SetState(true, "提交数据失败！");
                    }
                });

            });
        });
        DateTime now = DateTime.Now.AddMinutes(-15);
        string formattedTime = now.ToString("yyyy 年 M 月 d 日 HH:mm:ss");
        text_StartTime.text = formattedTime;

        DateTime now02 = DateTime.Now;
        string formattedTime02 = now02.ToString("yyyy 年 M 月 d 日 HH:mm:ss");
        text_EndTime.text = formattedTime02;

        // text_StartTime.text = DateTime.Now.AddMinutes(-15).ToString("F");
        //text_EndTime.text = DateTime.Now.ToString("F");

        text_UserName.text = CQOOC.Instance.userName;
        text_Score.text = UnityEngine.Random.Range(80f, 95f).ToString("0");
    }

  

 

2.截图 拼图 代码

using System;
using System.Collections;
using UnityEngine;
using UnityEngine.UI;

public class Capture_Long : MonoBehaviour
{
    public RectTransform svrt;
    public RectTransform contentRT;
    public Action CapCallBack;
    public Action CapByteCallBack;
    public Vector2 vec;

    /// 

    /// 接长图，进行拼接
    /// 
    /// Scroll Rect
    /// Content
    public void Cap_LongTex()
    {
        StartCoroutine(Cap(svrt, contentRT));
    }
    private IEnumerator Cap(RectTransform SVRT, RectTransform ContentRT)
    {
        //画布中的高度      950
        float SV_Y = SVRT.sizeDelta.y;

        //content显示的区域高度   0
        float Content_Y = ContentRT.anchoredPosition.y;
        //图片的整体高度   2660
        float Content_Height = contentRT.sizeDelta.y+ SV_Y;

        var mult = (float)(Content_Height / SV_Y);
        //整数倍
        int mult_int = (int)mult;
        //最后的小数倍
        float mult_float = mult - mult_int;

        //滚动条的宽度
        float verticalScrollbar_weight = SVRT.GetComponent().verticalScrollbar.GetComponent().sizeDelta.x;

        yield return new WaitForEndOfFrame();

        //合成图片的总高度
        int totalHeight = (int)Content_Height;
        Texture2D endTex = new Texture2D((int)vec.y, totalHeight, TextureFormat.RGBA32, false);
        int x = 0, y = 0;
        Color32[] colors;

        //整数倍的截图
        for (int i = 0; i < mult_int; i++)
        {
            ContentRT.anchoredPosition = new Vector2(0, SV_Y * i);
            yield return new WaitForEndOfFrame();
            //Rect rect_int = new Rect(Screen.width / 2 - SVRT.sizeDelta.x / 2 + SVRT.anchoredPosition.x, Screen.height / 2 - SVRT.sizeDelta.y / 2 + SVRT.anchoredPosition.y, SVRT.sizeDelta.x - verticalScrollbar_weight, SVRT.sizeDelta.y);
            //Rect rect_int = new Rect(420, 166.5f, 1365, SVRT.sizeDelta.y);
            Rect rect_int = new Rect(420, vec.x, vec.y, SVRT.sizeDelta.y);

            var tex_int = CaptureScreenshot(rect_int, i + "");

            //合成
            colors = tex_int.GetPixels32(0);
            if (i > 0)
            {
                y -= tex_int.height;
            }
            else
            {
                y = totalHeight - tex_int.height;
            }
            endTex.SetPixels32(x, y, tex_int.width, tex_int.height, colors);
        }

        //小数倍的截图
        ContentRT.anchoredPosition = new Vector2(0, SV_Y * (mult - 1));
        yield return new WaitForEndOfFrame();
        //Rect rect_float = new Rect(Screen.width / 2 - SVRT.sizeDelta.x / 2 + SVRT.anchoredPosition.x, Screen.height / 2 - SVRT.sizeDelta.y / 2 + SVRT.anchoredPosition.y, SVRT.sizeDelta.x - verticalScrollbar_weight, SVRT.sizeDelta.y * mult_float);
        Rect rect_float = new Rect(420, vec.x, vec.y, SVRT.sizeDelta.y * mult_float);

        var tex_float = CaptureScreenshot(rect_float, "end");

        //合成
        colors = tex_float.GetPixels32(0);
        y -= tex_float.height;
        endTex.SetPixels32(x, y, tex_float.width, tex_float.height, colors);
        endTex.Apply();
        byte[] bytes = endTex.EncodeToPNG();//然后将这些纹理数据，成一个png图片文件
        var strPng = Convert.ToBase64String(bytes);

#if UNITY_EDITOR
        string filename = Application.dataPath + "/PNG/合成.png";
        System.IO.File.WriteAllBytes(filename, bytes);
        Debug.Log(string.Format("截屏了一张图片: {0}", filename));
#endif

        SVRT.GetComponent().verticalNormalizedPosition = 1;
        CapCallBack?.Invoke(strPng);

        CapByteCallBack?.Invoke(bytes);
    }

    /// 

    /// 开始截图
    /// 
    /// The screenshot2.
    /// Rect.截图的区域，左下角为o点
    private Texture2D CaptureScreenshot(Rect rect, string name)
    {
        //Debug.Log(rect.ToString());
        Texture2D screenShot = new Texture2D((int)rect.width, (int)rect.height, TextureFormat.RGBA32, false);//先创建一个的空纹理，大小可根据实现需要来设置
        screenShot.ReadPixels(rect, 0, 0);//读取屏幕像素信息并存储为纹理数据，
        screenShot.Apply();

#if UNITY_EDITOR
        byte[] bytes = screenShot.EncodeToPNG();//然后将这些纹理数据，成一个png图片文件
        string filename = Application.dataPath + "/PNG/Screenshot" + name + ".png";
        System.IO.File.WriteAllBytes(filename, bytes);
        //Debug.Log(string.Format("截屏了一张图片: {0}", filename));
#endif
        return screenShot;
    }
}

3.web端代码

  
    
    
    
    
    
    
    
    
	 
	

  
  
    

      

      

        

        

        
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