ImageConversion.EncodeToEXR

参数

描述

将该纹理编码为 EXR 格式。

This function returns a byte array which is the EXR file 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. For the texture pass in, Texture.isReadable must be true. 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.

Additional resources: EXRFlags, EncodeToJPG, EncodeToPNG.

// Saves HDR RenderTexture as an EXR file.
using UnityEngine;
using System.Collections;
using System.IO;

public class SaveRenderTextureToEXR : MonoBehaviour
{
    RenderTexture m_InputTexture;

    void SaveRenderTexture()
    {
        if (m_InputTexture != null)
        {
            int width = m_InputTexture.width;
            int height = m_InputTexture.height;

            Texture2D tex = new Texture2D(width, height, TextureFormat.RGBAFloat, false);

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

            // Encode texture into the EXR
            byte[] bytes = ImageConversion.EncodeToEXR(tex, Texture2D.EXRFlags.CompressZIP);
            File.WriteAllBytes(Application.dataPath + "/../SavedRenderTexture.exr", bytes);

            Object.DestroyImmediate(tex);
        }
    }
}

Additional resources: EncodeArrayToEXR, EncodeNativeArrayToEXR, EncodeToPNG, EncodeToJPG, EncodeToTGA.