unity 使用shader处理并保存图片
时间: 2023-09-17 08:13:44 浏览: 318
你可以使用以下代码在 Unity 中使用 Shader 处理并保存图片:
```csharp
using UnityEngine;
public class SaveImageWithShader : MonoBehaviour
{
public Texture2D inputTexture;
public Shader imageEffectShader;
public string outputPath = "Output.png";
private void Start()
{
// 创建一个临时的 RenderTexture
RenderTexture renderTexture = new RenderTexture(inputTexture.width, inputTexture.height, 0);
Graphics.Blit(inputTexture, renderTexture);
// 创建一个用于保存图片的 Texture2D
Texture2D outputTexture = new Texture2D(renderTexture.width, renderTexture.height);
// 创建一个用于保存结果的 RenderTexture
RenderTexture outputRenderTexture = new RenderTexture(renderTexture.width, renderTexture.height, 0);
// 使用 Shader 处理图片
Material imageEffectMaterial = new Material(imageEffectShader);
Graphics.Blit(renderTexture, outputRenderTexture, imageEffectMaterial);
// 将结果保存到 Texture2D
RenderTexture.active = outputRenderTexture;
outputTexture.ReadPixels(new Rect(0, 0, outputRenderTexture.width, outputRenderTexture.height), 0, 0);
outputTexture.Apply();
// 将 Texture2D 保存为 PNG 文件
byte[] bytes = outputTexture.EncodeToPNG();
System.IO.File.WriteAllBytes(outputPath, bytes);
// 释放资源
RenderTexture.active = null;
Destroy(renderTexture);
Destroy(outputRenderTexture);
Destroy(outputTexture);
Destroy(imageEffectMaterial);
Debug.Log("Image saved to " + outputPath);
}
}
```
将上述脚本附加到一个 GameObject 上,并在 Inspector 面板中指定输入的 Texture2D、要应用的 Shader 和输出路径。运行场景后,脚本会将经过 Shader 处理后的图片保存为 PNG 文件。
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