/// <exception cref="Com.Drew.Imaging.Png.PngProcessingException"/>
public PngHeader([NotNull] sbyte[] bytes)
{
if (bytes.Length != 13)
{
throw new PngProcessingException("PNG header chunk must have 13 data bytes");
}
SequentialReader reader = new SequentialByteArrayReader(bytes);
try
{
_imageWidth = reader.GetInt32();
_imageHeight = reader.GetInt32();
_bitsPerSample = reader.GetInt8();
sbyte colorTypeNumber = reader.GetInt8();
PngColorType colorType = PngColorType.FromNumericValue(colorTypeNumber);
if (colorType == null)
{
throw new PngProcessingException("Unexpected PNG color type: " + colorTypeNumber);
}
_colorType = colorType;
_compressionType = reader.GetInt8();
_filterMethod = reader.GetInt8();
_interlaceMethod = reader.GetInt8();
}
catch (IOException e)
{
// Should never happen
throw new PngProcessingException(e);
}
}
/// <exception cref="Com.Drew.Imaging.Png.PngProcessingException"/>
public PngHeader(sbyte[] bytes)
{
if (bytes.Length != 13)
{
throw new PngProcessingException("PNG header chunk must have 13 data bytes");
}
SequentialReader reader = new SequentialByteArrayReader(bytes);
try
{
_imageWidth = reader.GetInt32();
_imageHeight = reader.GetInt32();
_bitsPerSample = reader.GetInt8();
sbyte colorTypeNumber = reader.GetInt8();
PngColorType colorType = PngColorType.FromNumericValue(colorTypeNumber);
if (colorType == null)
{
throw new PngProcessingException("Unexpected PNG color type: " + colorTypeNumber);
}
_colorType = colorType;
_compressionType = reader.GetInt8();
_filterMethod = reader.GetInt8();
_interlaceMethod = reader.GetInt8();
}
catch (IOException e)
{
// Should never happen
throw new PngProcessingException(e);
}
}
