customizing crop pictures

Determine the size of the picture, scale the picture according to the clipping target, and then crop the picture (in the case of the image without distortion)

        /// <summary>        ///Specify the length-width cropping///crop a picture to the maximum extent of the stencil scale and zoom to the stencil size/// </summary>        /// <param name= "FromFile" >Original Stream Object</param>        /// <param name= "Filesaveurl" >Save Path</param>        /// <param name= "MaxWidth" >Max width (unit: px)</param>        /// <param name= "MaxHeight" >Max height (unit: PX)</param>        /// <param name= "Quality" >quality (range 0-100)</param>         Public Static voidCutforcustom (Image initimage,stringFilesaveurl,intMaxWidth,intMaxHeight,intquality) {            //get the original picture from the file and use the embedded color management information in the stream//System.Drawing.Image initimage = System.Drawing.Image.FromStream (FromFile, true); //the original width and height are smaller than the template, not for processing, directly save            if(Initimage.width <= maxWidth && initimage.height <=maxheight)            {Initimage.save (Filesaveurl, System.Drawing.Imaging.ImageFormat.Jpeg); }            Else            {                //the width and height ratio of the template                DoubleTemplaterate = (Double) MaxWidth/MaxHeight; //the width and height ratio of the original picture                DoubleInitrate = (Double) Initimage.width/Initimage.height; //The original image is equal to the template, directly scaled                if(Templaterate = =initrate) {                    //generate final picture by template sizeSystem.Drawing.Image Templateimage =NewSystem.Drawing.Bitmap (MaxWidth, maxheight); System.Drawing.Graphics Templateg=System.Drawing.Graphics.FromImage (templateimage); Templateg.interpolationmode=System.Drawing.Drawing2D.InterpolationMode.High; Templateg.smoothingmode=System.Drawing.Drawing2D.SmoothingMode.HighQuality;                    Templateg.clear (Color.White); Templateg.drawimage (Initimage,NewSystem.Drawing.Rectangle (0,0, MaxWidth, MaxHeight),NewSystem.Drawing.Rectangle (0,0, Initimage.width, initimage.height), System.Drawing.GraphicsUnit.Pixel);                Templateimage.save (Filesaveurl, System.Drawing.Imaging.ImageFormat.Jpeg); }                //The original image is different from the template, scaled after cropping                Else                {                    //Crop ObjectsSystem.Drawing.Image Pickedimage =NULL; System.Drawing.Graphics PICKEDG=NULL; //positioningRectangle FROMR =NewRectangle (0,0,0,0);//Original crop positioningRectangle ToR =NewRectangle (0,0,0,0);//Target Positioning//wide to the standard for cropping                    if(Templaterate >initrate) {                        //Cropping Object InstantiationPickedimage =NewSystem.Drawing.Bitmap (Initimage.width, (int) System.Math.Floor (Initimage.width/templaterate)); PICKEDG=System.Drawing.Graphics.FromImage (pickedimage); //Clipping source PositioningFromr.x =0; Fromr.y= (int) System.Math.Floor ((initimage.height-initimage.width/templaterate)/2); Fromr.width=Initimage.width; Fromr.height= (int) System.Math.Floor (Initimage.width/templaterate); //clipping target positioningTor.x =0; Tor.y=0; Tor.width=Initimage.width; Tor.height= (int) System.Math.Floor (Initimage.width/templaterate); }                    //high for standard cropping                    Else{pickedimage=NewSystem.Drawing.Bitmap ((int) System.Math.Floor (Initimage.height *templaterate), initimage.height); PICKEDG=System.Drawing.Graphics.FromImage (pickedimage); Fromr.x= (int) System.Math.Floor ((Initimage.width-initimage.height * templaterate)/2); Fromr.y=0; Fromr.width= (int) System.Math.Floor (Initimage.height *templaterate); Fromr.height=Initimage.height; Tor.x=0; Tor.y=0; Tor.width= (int) System.Math.Floor (Initimage.height *templaterate); Tor.height=Initimage.height; }                    //Set QualityPickedg.interpolationmode =System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; Pickedg.smoothingmode=System.Drawing.Drawing2D.SmoothingMode.HighQuality; //croppingpickedg.drawimage (Initimage, ToR, FROMR, System.Drawing.GraphicsUnit.Pixel); //generate final picture by template sizeSystem.Drawing.Image Templateimage =NewSystem.Drawing.Bitmap (MaxWidth, maxheight); System.Drawing.Graphics Templateg=System.Drawing.Graphics.FromImage (templateimage); Templateg.interpolationmode=System.Drawing.Drawing2D.InterpolationMode.High; Templateg.smoothingmode=System.Drawing.Drawing2D.SmoothingMode.HighQuality;                    Templateg.clear (Color.White); Templateg.drawimage (Pickedimage,NewSystem.Drawing.Rectangle (0,0, MaxWidth, MaxHeight),NewSystem.Drawing.Rectangle (0,0, Pickedimage.width, pickedimage.height), System.Drawing.GraphicsUnit.Pixel); //Key Quality Control//gets an array of system encoding types, including the Jpeg,bmp,png,gif,tiffimagecodecinfo[] Icis =imagecodecinfo.getimageencoders (); ImageCodecInfo ici=NULL; foreach(ImageCodecInfo IinchICIS) {                        if(I.mimetype = ="Image/jpeg"|| I.mimetype = ="image/bmp"|| I.mimetype = ="Image/png"|| I.mimetype = ="Image/gif") {ici=i; }} encoderparameters EP=NewEncoderParameters (1); Ep. param[0] =NewEncoderparameter (System.Drawing.Imaging.Encoder.Quality, (Long) quality); //Save thumbnail imageTemplateimage.save (Filesaveurl, ICI, EP); //Templateimage.save (Filesaveurl, System.Drawing.Imaging.ImageFormat.Jpeg); //Freeing ResourcesTemplateg.dispose ();                    Templateimage.dispose ();                    Pickedg.dispose ();                Pickedimage.dispose (); }            }            //Freeing ResourcesInitimage.dispose (); }

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customizing crop pictures