ImageConversion.EncodeNativeArrayToPNG

参数

描述

将原生数组编码为 PNG 格式。

This function returns a NativeArray<byte> which is the PNG data. Write this data to disk to get the data in the PNG file format.

The encoded PNG data will contain alpha channel for RGBA32, ARGB32 textures, and no alpha channel for RGB24 textures. For single-channel red textures ( R8, R16, RFloat and RHalf ), the encoded PNG data will be in grayscale.

PNG data will not contain gamma correction or color profile information.

This method is thread safe.

Passing rowBytes of 0 will calculate the row length in bytes automatically.

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

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

    IEnumerator SaveScreenPNG()
    {
        // Read the screen buffer after rendering is complete
        yield return new WaitForEndOfFrame();

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

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

        // Encode the bytes in PNG format
        NativeArray<byte> imageBytes = new NativeArray<byte>(tex.GetRawTextureData(), Allocator.Temp);
        var bytes = ImageConversion.EncodeNativeArrayToPNG(imageBytes, tex.graphicsFormat, (uint)width, (uint)height);
        Object.Destroy(tex);

        // Write the returned byte array to a file in the project folder
        File.WriteAllBytes(Application.dataPath + "/../SavedScreen.png", bytes.ToArray());
    }
}

See Also: EncodeToPNG, EncodeArrayToPNG, EncodeNativeArrayToJPG, EncodeNativeArrayToTGA, EncodeNativeArrayToEXR.