本人最近做了一个拍照并打印的程序，使用到了多种图片编辑功能，现在罗列一下，希望对大家有所帮助。
裁剪，将贴图上的某个区域裁剪
/// /// 裁剪Texture2D /// /// /// /// /// /// /// public static Texture2D ScaleTextureCutOut(Texture2D originalTexture, int offsetX,int offsetY, float originalWidth, float originalHeight) { Texture2D newTexture = new Texture2D(Mathf.CeilToInt(originalWidth), Mathf.CeilToInt(originalHeight)); int maxX = originalTexture.width - 1; int maxY = originalTexture.height - 1; for (int y = 0; y < newTexture.height; y++) { for (int x = 0; x < newTexture.width; x++) { float targetX = x + offsetX; float targetY = y + offsetY; int x1 = Mathf.Min(maxX, Mathf.FloorToInt(targetX)); int y1 = Mathf.Min(maxY, Mathf.FloorToInt(targetY)); int x2 = Mathf.Min(maxX, x1 + 1); int y2 = Mathf.Min(maxY, y1 + 1); float u = targetX - x1; float v = targetY - y1; float w1 = (1 - u) * (1 - v); float w2 = u * (1 - v); float w3 = (1 - u) * v; float w4 = u * v; Color color1 = originalTexture.GetPixel(x1, y1); Color color2 = originalTexture.GetPixel(x2, y1); Color color3 = originalTexture.GetPixel(x1, y2); Color color4 = originalTexture.GetPixel(x2, y2); Color color = new Color(Mathf.Clamp01(color1.r * w1 + color2.r * w2 + color3.r * w3 + color4.r * w4), Mathf.Clamp01(color1.g * w1 + color2.g * w2 + color3.g * w3 + color4.g * w4), Mathf.Clamp01(color1.b * w1 + color2.b * w2 + color3.b * w3 + color4.b * w4), Mathf.Clamp01(color1.a * w1 + color2.a * w2 + color3.a * w3 + color4.a * w4) ); newTexture.SetPixel(x, y, color); } } newTexture.anisoLevel = 2; newTexture.Apply(); return newTexture; }缩放，缩放和放大原有贴图
/// /// 缩放Textur2D/// /// /// /// /// public static Texture2D ScaleTexture(Texture2D source, float targetWidth, float targetHeight){ Texture2D result = new Texture2D((int)targetWidth, (int)targetHeight, source.format, false); float incX = (1.0f / targetWidth); float incY = (1.0f / targetHeight); 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); result.SetPixel(j, i, newColor); } } result.Apply(); return result;}水平镜像
//水平翻转 public static Texture2D HorizontalFlipTexture(Texture2D texture) { //得到图片的宽高 int width = texture.width; int height = texture.height; Texture2D flipTexture = new Texture2D(width, height); for (int i = 0; i < width; i++) { flipTexture.SetPixels(i, 0, 1, height, texture.GetPixels(width - i - 1, 0, 1, height)); } flipTexture.Apply(); return flipTexture; }垂直镜像
// 垂直翻转 public static Texture2D VerticalFlipTexture(Texture2D texture) { //得到图片的宽高 int width = texture.width; int height = texture.height; Texture2D flipTexture = new Texture2D(width, height); for (int i = 0; i < height; i++) { flipTexture.SetPixels(0, i, width, 1, texture.GetPixels(0, height - i - 1, width, 1)); } flipTexture.Apply(); return flipTexture; }逆时针旋转90度
/// /// 图片逆时针旋转90度 /// /// 原图片二进制数据 /// 原图片宽度 /// 原图片高度 /// 输出目标图片 public static Texture2D RotationLeft90(Color32[] src, int srcW, int srcH) { Color32[] des = new Color32[src.Length]; Texture2D desTexture = new Texture2D(srcH, srcW); //if (desTexture.width != srcH || desTexture.height != srcW) //{ // desTexture.Resize(srcH, srcW); //} for (int i = 0; i < srcW; i++) { for (int j = 0; j < srcH; j++) { des[i * srcH + j] = src[(srcH - 1 - j) * srcW + i]; } } desTexture.SetPixels32(des); desTexture.Apply(); return desTexture; }顺时针旋转90度
/// /// 图片顺时针旋转90度 /// /// 原图片二进制数据 /// 原图片宽度 /// 原图片高度 /// 输出目标图片 public static Texture2D RotationRight90(Color32[] src, int srcW, int srcH) { Color32[] des = new Color32[src.Length]; Texture2D desTexture = new Texture2D(srcH, srcW); for (int i = 0; i < srcH; i++) { for (int j = 0; j < srcW; j++) { des[(srcW - j - 1) * srcH + i] = src[i * srcW + j]; } } desTexture.SetPixels32(des); desTexture.Apply(); return desTexture; }两张贴图合并，可以实现水印等功能，该代码是我实现3行3列9张相同照片排列
/// /// 两张图合并 /// /// /// /// /// /// /// /// public static Texture2D MergeImage(Texture2D _baseTexture2D, Texture2D _texture2D,int _x,int _y,int _w,int _h) { //取图 Color32[] color = _texture2D.GetPixels32(0); for (int j = 0; j < 3; j++) { for (int i = 0; i < 3; i++) { _baseTexture2D.SetPixels32(_x + i * (_texture2D.width+ _w), _y + j * (_texture2D.height+_h), _texture2D.width, _texture2D.height, color); //宽度 } } //应用 _baseTexture2D.Apply(); return _baseTexture2D; }修改图片的水平和垂直分辨率(像素/英寸，每英寸距离的图像包含的像素数目。)
Bitmap操作需要用到System.Drawing.dll，请自行下载！
/// /// 修改图片水平和垂直像素量 /// public static Texture2D SetPictureResolution(string _path) { Bitmap bm = new Bitmap(_path); bm.SetResolution(300, 300); string _idPath = Application.persistentDataPath + "/"; string _name = "print.jpg"; bm.Save(_idPath + _name, ImageFormat.Jpeg); Texture2D tex = loadTexture(_idPath, _name); File.WriteAllBytes(Application.persistentDataPath + "/aa.jpg", tex.EncodeToJPG()); bm.Dispose(); return tex; }