ImageConversion.EncodeToPNG

参数

描述

将此纹理编码为 PNG 格式。

此函数返回包含 PNG 文件数据的字节数组。您可以将编码的数据存储为文件，或在不经过进一步处理的情况下通过网络发送它。

此函数不适用于任何压缩格式。 Texture.isReadable 必须为 true。

编码的 PNG 数据将为 8 位灰度、RGB 或 RGBA（具体取决于所传入的格式）。对于单通道红色纹理（ R8、R16、RFloat 和 RHalf ），编码的 PNG 数据将为灰度。PNG 数据不包含伽玛校正或色彩配置文件信息。

// Saves screenshot as PNG file.
using UnityEngine;
using UnityEngine.Networking;
using System.Collections;
using System.IO;

public class PNGUploader : MonoBehaviour
{
    // Take a shot immediately
    IEnumerator Start()
    {
        yield return UploadPNG();
    }

    IEnumerator UploadPNG()
    {
        // We should only read the screen buffer after rendering is complete
        yield return new WaitForEndOfFrame();

        // Create a texture the size of the screen, RGB24 format
        int width = Screen.width;
        int height = Screen.height;
        Texture2D tex = new Texture2D(width, height, TextureFormat.RGB24, false);

        // Read screen contents into the texture
        tex.ReadPixels(new Rect(0, 0, width, height), 0, 0);
        tex.Apply();

        // Encode texture into PNG
        byte[] bytes = ImageConversion.EncodeToPNG(tex);
        Object.Destroy(tex);

        // For testing purposes, also write to a file in the project folder
        // File.WriteAllBytes(Application.dataPath + "/../SavedScreen.png", bytes);


        // Create a Web Form
        WWWForm form = new WWWForm();
        form.AddField("frameCount", Time.frameCount.ToString());
        form.AddBinaryData("fileUpload", bytes);

        // Upload to a cgi script
        var w = UnityWebRequest.Post("http://localhost/cgi-bin/env.cgi?post", form);
        yield return w.SendWebRequest();

        if (w.result != UnityWebRequest.Result.Success)
        {
            Debug.Log(w.error);
        }
        else
        {
            Debug.Log("Finished Uploading Screenshot");
        }
    }
}

其他资源：ReadPixels、WaitForEndOfFrame、LoadImage、EncodeArrayToPNG、EncodeNativeArrayToPNG、EncodeToJPG、EncodeToTGA、EncodeToEXR。