ImageConversion.EncodeNativeArrayToEXR

参数

描述

将原生数组编码为 EXR 格式。

This function returns a NativeArray<byte> which is the EXR data. You can store the encoded data as a file or send it over the network without further processing.

This function does not work on any compressed format. Although it is best to use this function for HDR texture formats (either 16-bit or 32-bit floats), it can be used with other formats (and the data is converted on the fly). The default output format is uncompressed 16-bit float EXR and can be controlled using the passed in flags. The encoded EXR data will only contain an alpha channel when the passed-in format has one. For single-channel red textures ( R8, R16, RFloat and RHalf ), the encoded data will be in grayscale mode.

This method is thread safe.

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

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

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

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

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

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

        // Encode the bytes in EXR format
        NativeArray<byte> imageBytes = new NativeArray<byte>(tex.GetRawTextureData(), Allocator.Temp);
        var bytes = ImageConversion.EncodeNativeArrayToEXR(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.exr", bytes.ToArray());
    }
}

See Also: EncodeToEXR, EncodeArrayToEXR, EncodeNativeArrayToPNG, EncodeNativeArrayToJPG, EncodeNativeArrayToTGA.