DoubledFrame.cc

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#include "DoubledFrame.hh"
#include "narrow.hh"
#include <cstdint>
 
namespace openmsx {
 
void DoubledFrame::init(FrameSource* field_, int skip_)
{
        FrameSource::init(FIELD_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