ImageConversion.EncodeArrayToEXR

参数

描述

将数组编码为 EXR 格式。

This function returns a byte array which is the EXR file data. Write this data to disk to get the data in the EXR file format.

It is best to use this function for HDR texture formats (either 16-bit or 32-bit floats). The default output format is 16-bit float EXR.

The encoded EXR data will always contain an alpha channel.

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 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
        byte[] bytes = ImageConversion.EncodeArrayToEXR(tex.GetRawTextureData(), 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);
    }
}

See Also: EncodeToEXR, EncodeNativeArrayToEXR, EncodeArrayToPNG, EncodeArrayToJPG, EncodeArrayToTGA.