/// <summary>
/// Gets a PNG image's width from base 64 encoded data.
/// </summary>
/// <param name="data">The data.</param>
/// <returns>The width.</returns>
public static int GetPngWidthFromBase64Data(string data)
{
// Preconditions
if (data == null || data.Length < 32)
{
return(0);
}
// Implementation
byte[] bytes = Convert.FromBase64String(data.Substring(0, 32));
byte[] widthBytes = PngHelper.Slice(bytes, 16, 20);
Array.Reverse(widthBytes);
int width = BitConverter.ToInt32(widthBytes, 0);
return(width);
}
/// <summary>
/// Gets a PNG image's height from base 64 encoded data.
/// </summary>
/// <param name="data">The data.</param>
/// <returns>The height.</returns>
public static int GetPngHeightFromBase64Data(string data)
{
// Preconditions
if (data == null || data.Length < 32)
{
return(0);
}
// Implementation
byte[] bytes = Convert.FromBase64String(data.Substring(0, 32));
byte[] heightBytes = PngHelper.Slice(bytes, 20, 24);
Array.Reverse(heightBytes);
int height = BitConverter.ToInt32(heightBytes, 0);
return(height);
}
