DoubledFrame.cc

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#include "DoubledFrame.hh"
#include "narrow.hh"
#include <cstdint>
 
namespace openmsx {
 
DoubledFrame::DoubledFrame(const PixelFormat& format)
        : FrameSource(format)
{
}
 
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;
}
 
const void* DoubledFrame::getLineInfo(
        unsigned line, unsigned& width, void* buf, unsigned bufWidth) const
{
        return field->getLineInfo(std::max(narrow<int>(line) - skip, 0) / 2, width, buf, bufWidth);
}
 
} // namespace openmsx