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◆ main openmsx / src / video / VideoLayer.cc
2.7 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#include "VideoLayer.hh"
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#include "Display.hh"
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#include "BooleanSetting.hh"
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#include "Event.hh"
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#include "GlobalSettings.hh"
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#include "MSXEventDistributor.hh"
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#include "MSXMotherBoard.hh"
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#include "Reactor.hh"
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#include "one_of.hh"
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namespace openmsx {
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VideoLayer::VideoLayer(MSXMotherBoard& motherBoard_,
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                       const std::string& videoSource_)
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	: Layer(Layer::Coverage::NONE, Layer::ZIndex::BACKGROUND)
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	, motherBoard(motherBoard_)
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	, display(motherBoard.getReactor().getDisplay())
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	, videoSourceSetting(motherBoard.getVideoSource())
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	, videoSourceActivator(videoSourceSetting, videoSource_)
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	, powerSetting(motherBoard.getReactor().getGlobalSettings().getPowerSetting())
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{
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	calcCoverage();
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	calcZ();
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	display.addLayer(*this);
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	videoSourceSetting.attach(*this);
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	powerSetting.attach(*this);
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	motherBoard.getMSXEventDistributor().registerEventListener(*this);
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}
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VideoLayer::~VideoLayer()
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{
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	motherBoard.getMSXEventDistributor().unregisterEventListener(*this);
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	powerSetting.detach(*this);
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	videoSourceSetting.detach(*this);
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	display.removeLayer(*this);
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}
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int VideoLayer::getVideoSource() const
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{
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	return videoSourceActivator.getID();
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}
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int VideoLayer::getVideoSourceSetting() const
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{
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	return videoSourceSetting.getSource();
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}
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void VideoLayer::update(const Setting& setting) noexcept
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{
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	if (&setting == &videoSourceSetting) {
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		calcZ();
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	} else if (&setting == &powerSetting) {
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		calcCoverage();
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	}
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}
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void VideoLayer::calcZ()
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{
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	setZ((videoSourceSetting.getSource() == getVideoSource())
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		? ZIndex::MSX_ACTIVE
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		: ZIndex::MSX_PASSIVE);
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}
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void VideoLayer::calcCoverage()
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{
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	auto cov = (!powerSetting.getBoolean() || !motherBoard.isActive())
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	         ? Coverage::NONE
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	         : Coverage::FULL;
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	setCoverage(cov);
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}
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void VideoLayer::signalMSXEvent(const Event& event,
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                                EmuTime /*time*/) noexcept
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{
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	if (getType(event) == one_of(EventType::MACHINE_ACTIVATED,
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		                     EventType::MACHINE_DEACTIVATED)) {
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		calcCoverage();
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	}
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}
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bool VideoLayer::needRender() const
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{
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	// Either when this layer itself is selected or when the video9000
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	// layer is selected and this layer is needed to render a
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	// (superimposed) image.
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	int current = videoSourceSetting.getSource();
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	return (current == getVideoSource()) ||
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	      ((current == video9000Source) && (activeVideo9000 != Video9000Active::NO));
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}
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bool VideoLayer::needRecord() const
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{
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	// Either when this layer itself is selected or when the video9000
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	// layer is selected and this layer is the front layer of a
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	// (superimposed) image
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	int current = videoSourceSetting.getSource();
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	return (current == getVideoSource()) ||
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	      ((current == video9000Source) && (activeVideo9000 == Video9000Active::FRONT));
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}
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} // namespace openmsx