Unity 代码集锦之图片处理

1、将Texture2D保存为jpg

void TestSaveImageToJPG(Texture2D buffer){File.WriteAllBytes("F:/output.jpg", buffer.EncodeToJPG());}

 

2、将图片的原始数据保存至txt

void TestSaveImageToTXT(Texture2D buffer){byte[] rawData= buffer.GetRawTextureData();//byte[] bt = ChangeRGB(rawData).GetRawTextureData();//转换RGB//char[] ch = Encoding.ASCII.GetChars(bt);//byte[]转为char[]StreamWriter sw = new StreamWriter(@"F:\\output.txt"); //保存到指定路径for (int i = 0; i < rawData.Length; i++){sw.Write(rawData[i]);sw.Write(' ');}sw.Flush();sw.Close();}

　

 

3、转换图片的RGB

Texture2D ChangeRGB(Texture2D source){Texture2D result = new Texture2D(source.width, source.height, TextureFormat.RGB24, false);for (int i = 0; i < result.height; ++i){for (int j = 0; j < result.width; ++j){Color newColor = source.GetPixelBilinear((float)j / (float)result.width, (float)i / (float)result.height);float temp = newColor.r;newColor.r = newColor.b;newColor.b = temp;result.SetPixel(j, i, newColor);}}result.Apply();return result;}

　　

　

对于大多数纹理，更快的是使用GetPixels32，它返回低精度颜色数据，而无需进行昂贵的整数到浮点转换。其中Color数组是Texture2D从左到右，从下到上的像素

Texture2D ChangeRGB(Texture2D source){Texture2D result = new Texture2D(source.width, source.height, TextureFormat.RGB24, false);for (int i = 0; i < result.height; ++i){for (int j = 0; j < result.width; ++j){result.SetPixel(j, result.height - i, source.GetPixelBilinear((float)j / (float)result.width, (float)i / (float)result.height));}}result.Apply();return result;}

　　

下面代码和上面代码功能是一样的，都是将图片上下并镜像翻转，但是速度却快了近一倍

Texture2D ChangeRGB(Texture2D source){Texture2D result = new Texture2D(source.width, source.height, TextureFormat.RGB24, false);Color32[] sourceColor = source.GetPixels32();Color32[] newColor = new Color32[sourceColor.Length];for (int i = 0; i < result.height; ++i){for (int j = 0; j < result.width; ++j){newColor[(result.width * (result.height - i - 1)) + j] = sourceColor[(result.width * i) + j];}}result.SetPixels32(newColor);result.Apply();return result;}

　　

或

Texture2D ChangeRGB(Texture2D source){Texture2D result = new Texture2D(source.width, source.height, TextureFormat.RGB24, false);Color32[] sourceColor = source.GetPixels32();Color32[] newColor = new Color32[sourceColor.Length];int currentR = 0;//当前的行int currentC = 0;//当前的列for (int i = 0; i < sourceColor.Length; i++){if (i % result.width == 0){currentR = i / result.width;currentC = 0;}else{currentC++;}newColor[(result.width * (result.height - currentR - 1)) + currentC] = sourceColor[(result.width * currentR) + currentC];}result.SetPixels32(newColor);result.Apply();return result;}

　　

附：

//顺时针旋转90度Texture2D ChangeRGB(Texture2D source){Texture2D result = new Texture2D( source.height, source.width, TextureFormat.RGB24, false);Color32[] sourceColor = source.GetPixels32();Color32[] newColor = new Color32[sourceColor.Length];for (int i = 0; i < source.height; ++i){for (int j = 0; j < source.width; ++j){newColor[(source.height * (source.width - 1-j)) + i] = sourceColor[(source.width * i) + j];}}result.SetPixels32(newColor);result.Apply();return result;}

　　

//逆时针旋转90度Texture2D ChangeRGB(Texture2D source){Texture2D result = new Texture2D( source.height, source.width, TextureFormat.RGB24, false);Color32[] sourceColor = source.GetPixels32();Color32[] newColor = new Color32[sourceColor.Length];for (int i = 0; i < source.height; ++i){for (int j = 0; j < source.width; ++j){newColor[(source.height * j) + (source.height-1-i)] = sourceColor[(source.width * i) + j];}}result.SetPixels32(newColor);result.Apply();return result;}

　　

4、将Texture转为Texture2D，参数可传入Texture也可传入WebCamTexture类型的参数，和上述的“1”配合使用，可将摄像头的数据保存为图片

Texture2D TextureToTexture2D(Texture texture){Texture2D texture2D = new Texture2D(texture.width, texture.height, TextureFormat.RGBA32, false);RenderTexture currentRT = RenderTexture.active;RenderTexture renderTexture = RenderTexture.GetTemporary(texture.width, texture.height, 32);Graphics.Blit(texture, renderTexture);RenderTexture.active = renderTexture;texture2D.ReadPixels(new Rect(0, 0, renderTexture.width, renderTexture.height), 0, 0);texture2D.Apply();RenderTexture.active = currentRT;RenderTexture.ReleaseTemporary(renderTexture);return texture2D;}

　　

 5、屏幕截图

Texture2D frameBuffer;Rect camRect;frameBuffer = new Texture2D(width, height, TextureFormat.RGB24, false, false);camRect = new Rect(0, 0, width, height);frameBuffer.ReadPixels(camRect, 0, 0);frameBuffer.Apply();

　　

　　

转载于:https://www.cnblogs.com/Jason-c/p/10812805.html

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