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"

namespace openmsx {

VideoLayer::VideoLayer(MSXMotherBoard& motherBoard_,
                       const std::string& videoSource_)
        : motherBoard(motherBoard_)
        , display(motherBoard.getReactor().getDisplay())
        , videoSourceSetting(motherBoard.getVideoSource())
        , videoSourceActivator(videoSourceSetting, videoSource_)
        , powerSetting(motherBoard.getReactor().getGlobalSettings().getPowerSetting())
        , video9000Source(0)
        , activeVideo9000(INACTIVE)
{
        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)
{
        if (&setting == &videoSourceSetting) {
                calcZ();
        } else if (&setting == &powerSetting) {
                calcCoverage();
        }
}

void VideoLayer::calcZ()
{
        setZ((videoSourceSetting.getSource() == getVideoSource())
                ? Z_MSX_ACTIVE
                : Z_MSX_PASSIVE);
}

void VideoLayer::calcCoverage()
{
        Coverage cov;
        if (!powerSetting.getBoolean() || !motherBoard.isActive()) {
                cov = COVER_NONE;
        } else {
                cov = COVER_FULL;
        }
        setCoverage(cov);
}

void VideoLayer::signalEvent(const std::shared_ptr<const Event>& event,
                             EmuTime::param /*time*/)
{
        if ((event->getType() == OPENMSX_MACHINE_ACTIVATED) ||
            (event->getType() == OPENMSX_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 != INACTIVE));
}

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 == ACTIVE_FRONT));
}

} // namespace openmsx