com.groupdocs.editor.htmlcss.resources.images.raster

Class PngImage

    • Constructor Detail

      • PngImage

        public PngImage(String name,
                InputStream binaryContent)
                 throws Exception

        Creates new PngImage instance from content, represented as byte stream, and with specified name

        Parameters:
        name - Name of the PNG image. Cannot be null, empty or whitespaces.
        binaryContent - Content as byte stream. Reading begins from original position. Cannot be null. Should be readable and seakable. If this instance will be disposed, this stream will be disposed too.
        Throws:
        com.aspose.ms.System.ArgumentException
        com.groupdocs.editor.htmlcss.exceptions.InvalidImageFormatException
        Exception
      • PngImage

        public PngImage(String name,
                String contentInBase64)
                 throws Exception

        Creates new PngImage instance from content, represented as base64-encoded string, and with specified name

        Parameters:
        name - Name of the PNG image. Cannot be null, empty or whitespaces.
        contentInBase64 - Content as base64-encoded string. Cannot be null, empty or whitespaces. If it is not a PNG content, exception will be thrown.
        Throws:
        Exception
        com.groupdocs.editor.htmlcss.exceptions.InvalidImageFormatException
    • Method Detail

      • isValid

        public static boolean isValid(InputStream binaryContent)
                               throws Exception

        Checks whether specified stream is a valid PNG image

        Parameters:
        binaryContent - Content as byte stream. Reading begins from original position. Cannot be null.
        Returns:
        Throws:
        Exception
      • isValid

        public static boolean isValid(String contentInBase64)

        Checks whether specified base64-encoded string is a valid PNG image

        Parameters:
        contentInBase64 - Content as base64-encoded string. Cannot be null, empty or whitespaces.
        Returns:
      • reduceToNewHeight

        public PngImage reduceToNewHeight(int targetHeightInPixels)
                                   throws Exception

        Creates and returns a new reduced PNG image, but with specified new reduced height and proportionally reduced width.

        Overrides:
        reduceToNewHeight in class RasterImageResourceBase
        Parameters:
        targetHeightInPixels - Height of the desired PNG image in pixels. Should be strictly lesser than original height.
        Returns:
        Throws:
        Exception