/// <summary>
/// Initializes the item based on the specified PdfDictionary.
/// </summary>
/// <param name="dictionary">The dictionary to use for initialization.</param>
private void Initialize(PdfDictionary dictionary)
{
if (dictionary == null)
{
throw new ArgumentNullException("dictionary", "The PDF dictionary item to extract image meta data from was null.");
}
if (!dictionary.IsImage())
{
throw new ArgumentException("The specified dictionary does not represent an image.", "dictionary");
}
Height = dictionary.Elements.GetInteger("/Height");
Width = dictionary.Elements.GetInteger("/Width");
BitsPerPixel = dictionary.Elements.GetInteger("/BitsPerComponent");
Length = dictionary.Elements.GetInteger("/Length");
PdfItem colorSpace = null;
if (dictionary.Elements.TryGetValue("/ColorSpace", out colorSpace))
{
ColorSpace = PdfDictionaryColorSpace.Parse(colorSpace);
}
else
{
ColorSpace = new PdfRGBColorSpace(); // Default to RGB Color Space
}
Compression = Compression.CCITTFAX4;
}