VideoLayer.cc

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#include "VideoLayer.hh"
#include "Display.hh"
#include "Reactor.hh"
#include "GlobalSettings.hh"
#include "BooleanSetting.hh"
#include "MSXEventDistributor.hh"
#include "MSXMotherBoard.hh"
#include "Event.hh"
#include "one_of.hh"
 
namespace openmsx {
 
VideoLayer::VideoLayer(MSXMotherBoard& motherBoard_,
                       const std::string& videoSource_)
        : Layer(Layer::Coverage::NONE, Layer::ZIndex::BACKGROUND)
        , motherBoard(motherBoard_)
        , display(motherBoard.getReactor().getDisplay())
        , videoSourceSetting(motherBoard.getVideoSource())
        , videoSourceActivator(videoSourceSetting, videoSource_)
        , powerSetting(motherBoard.getReactor().getGlobalSettings().getPowerSetting())
{
        calcCoverage();
        calcZ();
        display.addLayer(*this);
 
        videoSourceSetting.attach(*this);
        powerSetting.attach(*this);
        motherBoard.getMSXEventDistributor().registerEventListener(*this);
}
 
VideoLayer::~VideoLayer()
{
        motherBoard.getMSXEventDistributor().unregisterEventListener(*this);
        powerSetting.detach(*this);
        videoSourceSetting.detach(*this);
 
        display.removeLayer(*this);
}
 
int VideoLayer::getVideoSource() const
{
        return videoSourceActivator.getID();
}
int VideoLayer::getVideoSourceSetting() const
{
        return videoSourceSetting.getSource();
}
 
void VideoLayer::update(const Setting& setting) noexcept
{
        if (&setting == &videoSourceSetting) {
                calcZ();
        } else if (&setting == &powerSetting) {
                calcCoverage();
        }
}
 
void VideoLayer::calcZ()
{
        setZ((videoSourceSetting.getSource() == getVideoSource())
                ? ZIndex::MSX_ACTIVE
                : ZIndex::MSX_PASSIVE);
}
 
void VideoLayer::calcCoverage()
{
        auto cov = (!powerSetting.getBoolean() || !motherBoard.isActive())
                 ? Coverage::NONE
                 : Coverage::FULL;
        setCoverage(cov);
}
 
void VideoLayer::signalMSXEvent(const Event& event,
                                EmuTime::param /*time*/) noexcept
{
        if (getType(event) == one_of(EventType::MACHINE_ACTIVATED,
                                     EventType::MACHINE_DEACTIVATED)) {
                calcCoverage();
        }
}
 
bool VideoLayer::needRender() const
{
        // Either when this layer itself is selected or when the video9000
        // layer is selected and this layer is needed to render a
        // (superimposed) image.
        int current = videoSourceSetting.getSource();
        return (current == getVideoSource()) ||
              ((current == video9000Source) && (activeVideo9000 != Video9000Active::NO));
}
 
bool VideoLayer::needRecord() const
{
        // Either when this layer itself is selected or when the video9000
        // layer is selected and this layer is the front layer of a
        // (superimposed) image
        int current = videoSourceSetting.getSource();
        return (current == getVideoSource()) ||
              ((current == video9000Source) && (activeVideo9000 == Video9000Active::FRONT));
}
 
} // namespace openmsx