상속: IDisposable
예제 #1
0
 // Operation: scale an image to the given dimensions.
 public static byte[] scaleImageTo(byte[] inBytes, int outWidth, int outHeight)
 {
     using (StreamImage inImage = byteArrayToImage(inBytes))
     {
         int x, y, w, h;
         int iWoH = inImage.mImage.Width * outHeight;
         int iHoW = inImage.mImage.Height * outWidth;
         if (iWoH < iHoW)
         {
             w = (int)((double)(iWoH) / inImage.mImage.Height);
             h = outHeight;
             x = (int)((outWidth - w) / 2.0);
             y = 0;
         }
         else
         {
             w = outWidth;
             h = (int)((double)(iHoW) / inImage.mImage.Width);
             x = 0;
             y = (int)((outHeight - h) / 2.0);
         }
         using (Bitmap outImage = new Bitmap(outWidth, outHeight))
         {
             drawImage(inImage.mImage, outImage, new Rectangle(x, y, w, h));
             return(imageToByteArray(outImage));
         }
     }
 }
예제 #2
0
        // Operation: rotate an image by 90, 180, or 270 degrees.
        public static byte[] rotateImage(byte[] inBytes, int rotateType)
        {
            RotateFlipType rotateFlipType;

            switch (rotateType)
            {
            case 1:
                rotateFlipType = RotateFlipType.Rotate90FlipNone;
                break;

            case 2:
                rotateFlipType = RotateFlipType.Rotate180FlipNone;
                break;

            case 3:
                rotateFlipType = RotateFlipType.Rotate270FlipNone;
                break;

            default:
                throw new ArgumentException("Invalid type");
            }
            using (StreamImage inImage = byteArrayToImage(inBytes))
            {
                inImage.mImage.RotateFlip(rotateFlipType);
                return(imageToByteArray(inImage.mImage));
            }
        }
예제 #3
0
 // Operation: scale an image by a scale factor.
 public static byte[] scaleImageBy(byte[] inBytes, float scaleFactor)
 {
     using (StreamImage inImage = byteArrayToImage(inBytes))
     {
         int outWidth  = (int)(inImage.mImage.Width * scaleFactor);
         int outHeight = (int)(inImage.mImage.Height * scaleFactor);
         using (Bitmap outImage = new Bitmap(outWidth, outHeight))
         {
             drawImage(inImage.mImage, outImage, new Rectangle(0, 0, outWidth, outHeight));
             return(imageToByteArray(outImage));
         }
     }
 }
예제 #4
0
 // Operation: return the value of an image property (provided it's a string or integer).
 // Use property ID 8298 for copyright.
 // See https://msdn.microsoft.com/en-us/library/ms534416.aspx for additional IDs.
 public static string getImageProperty(byte[] inBytes, int propertyId)
 {
     using (StreamImage inImage = byteArrayToImage(inBytes))
     {
         foreach (PropertyItem propItem in inImage.mImage.PropertyItems)
         {
             if (propItem.Id == propertyId)
             {
                 return((propItem.Type == 2) ? System.Text.Encoding.UTF8.GetString(propItem.Value) : propItem.Value.ToString());
             }
         }
     }
     return(null);
 }