private void WriteImageHeader()
{
using (var chunk = new PngChunkStream(output, PngChunkIdentifier.ImageHeader))
{
var colorType = palette.Count > 0 ?
PngColorType.IndexedColour : PngColorType.TruecolourWithAlpha;
chunk.WriteBigEndian(Width);
chunk.WriteBigEndian(Height);
chunk.WriteByte(8); // Bit depth
chunk.WriteByte(colorType);
chunk.WriteByte(0); // Compression
chunk.WriteByte(0); // Filter
chunk.WriteByte(0); // Interlace
}
}
private void WriteImageGamma()
{
using (var chunk = new PngChunkStream(output, PngChunkIdentifier.ImageGamma))
{
chunk.WriteBigEndian(45455);
}
}