Package org.apache.poi.ss.util

Class ImageUtils

java.lang.Object
org.apache.poi.ss.util.ImageUtils
public final class ImageUtils extends Object

  • Method Details

    • getImageDimension

      public static Dimension getImageDimension(InputStream is, int type)
      Return the dimension of this image
      Parameters:
      is - the stream containing the image data
      type - type of the picture: Workbook.PICTURE_TYPE_JPEG, Workbook.PICTURE_TYPE_PNG or Workbook.PICTURE_TYPE_DIB
      Returns:
      image dimension in pixels

    • getResolution

      public static int[] getResolution(ImageReader r) throws IOException
      The metadata of PNG and JPEG can contain the width of a pixel in millimeters. Return the "effective" dpi calculated as 25.4/HorizontalPixelSize and 25.4/VerticalPixelSize. Where 25.4 is the number of mm in inch.
      Returns:
      array of two elements: {horizontalDpi, verticalDpi}. {96, 96} is the default.
      Throws:
      IOException

    • setPreferredSize

      public static Dimension setPreferredSize(Picture picture, double scaleX, double scaleY)
      Calculate and set the preferred size (anchor) for this picture.
      Parameters:
      scaleX - the amount by which image width is multiplied relative to the original width.
      scaleY - the amount by which image height is multiplied relative to the original height.
      Returns:
      the new Dimensions of the scaled picture in EMUs
      Throws:
      IllegalArgumentException - if scale values lead to negative or infinite results
      IllegalStateException - if the picture data is corrupt

    • getDimensionFromAnchor

      public static Dimension getDimensionFromAnchor(Picture picture)
      Calculates the dimensions in EMUs for the anchor of the given picture
      Parameters:
      picture - the picture containing the anchor
      Returns:
      the dimensions in EMUs

    • getDimensionFromAnchor

      public static Dimension getDimensionFromAnchor(ClientAnchor anchor, Sheet sheet)
      Calculates the dimensions in EMUs for the given anchor in the context of the given sheet.
      Parameters:
      anchor - the anchor of which we want to calculate the dimensions.
      sheet - the sheet where the anchor is inserted; it's required to obtain the cell width/height necessary to calculate the dimensions of the anchor.
      Returns:
      the dimensions in EMUs
      Since:
      6.0.0

    • getRowHeightInPixels

      public static double getRowHeightInPixels(Sheet sheet, int rowNum)