#include "DeinterlacedFrame.hh"

#include <cassert>

namespace openmsx {

void DeinterlacedFrame::init(FrameSource* evenField, FrameSource* oddField)

{

	FrameSource::init(FieldType::NONINTERLACED);

	// TODO: I think these assertions make sense, but we cannot currently

	//       guarantee them. See TODO in PostProcessor::paint.

	//assert(evenField->getField() == FrameSource::FieldType::EVEN);

	//assert(oddField->getField() == FrameSource::FieldType::ODD);

	assert(evenField->getHeight() == oddField->getHeight());

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

	fields[0] = evenField;

	fields[1] = oddField;

}

unsigned DeinterlacedFrame::getLineWidth(unsigned line) const

{

	return fields[line & 1]->getLineWidth(line >> 1);

}

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

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

{

	return fields[line & 1]->getUnscaledLine(line >> 1, helpBuf);

}

} // namespace openmsx