#include "DoubledFrame.hh"

#include "narrow.hh"

namespace openmsx {

void DoubledFrame::init(FrameSource* field_, int skip_)

{

	FrameSource::init(FieldType::NONINTERLACED);

	field = field_;

	skip = skip_;

	setHeight(2 * field->getHeight());

}

unsigned DoubledFrame::getLineWidth(unsigned line) const

{

	int t = narrow<int>(line) - skip;

	return (t >= 0) ? field->getLineWidth(t / 2) : 1;

}

std::span<const FrameSource::Pixel> DoubledFrame::getUnscaledLine(

	unsigned line, std::span<Pixel> helpBuf) const

{

	return field->getUnscaledLine(std::max(narrow<int>(line) - skip, 0) / 2, helpBuf);

}

} // namespace openmsx