Video9000.cc

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#include "Video9000.hh"
#include "VDP.hh"
#include "V9990.hh"
#include "Reactor.hh"
#include "Display.hh"
#include "PostProcessor.hh"
#include "EventDistributor.hh"
#include "Event.hh"
#include "MSXMotherBoard.hh"
#include "VideoSourceSetting.hh"
#include "CommandException.hh"
#include "serialize.hh"
 
namespace openmsx {
 
Video9000::Video9000(const DeviceConfig& config)
        : MSXDevice(config)
        , VideoLayer(getMotherBoard(), getName())
        , videoSourceSetting(getMotherBoard().getVideoSource())
{
        // we can't set activeLayer yet
        EventDistributor& distributor = getReactor().getEventDistributor();
        distributor.registerEventListener(EventType::FINISH_FRAME, *this);
        getReactor().getDisplay().attach(*this);
}
 
void Video9000::init()
{
        MSXDevice::init();
        auto refs = getReferences(); // make copy
        bool error = false;
        if (refs.size() != 2) error = true;
        if (!error && !dynamic_cast<VDP*>(refs[0])) {
                std::swap(refs[0], refs[1]); // try reverse order
        }
        if (!error) vdp   = dynamic_cast<VDP*  >(refs[0]);
        if (!error) v9990 = dynamic_cast<V9990*>(refs[1]);
        if (error || !vdp || !v9990) {
                throw MSXException(
                        "Invalid Video9000 configuration: "
                        "need reference to VDP and V9990 device.");
        }
}
 
Video9000::~Video9000()
{
        EventDistributor& distributor = getReactor().getEventDistributor();
        distributor.unregisterEventListener(EventType::FINISH_FRAME, *this);
        getReactor().getDisplay().detach(*this);
}
 
void Video9000::reset(EmuTime::param time)
{
        Video9000::writeIO(0x6f, 0x10, time);
}
 
void Video9000::writeIO(word /*port*/, byte newValue, EmuTime::param /*time*/)
{
        if (newValue == value) return;
        value = newValue;
        recalculate();
}
 
void Video9000::recalculate()
{
        int video9000id = getVideoSource();
        v99x8Layer = vdp  ->getPostProcessor();
        v9990Layer = v9990->getPostProcessor();
        assert(!!v99x8Layer == !!v9990Layer); // either both or neither
 
        // ...0.... -> only V9990
        // ...10... -> only V99x8
        // ...11... -> superimpose
        bool showV99x8   = ((value & 0x10) == 0x10);
        bool showV9990   = ((value & 0x18) != 0x10);
        assert(showV99x8 || showV9990);
        using enum VideoLayer::Video9000Active;
        if (v99x8Layer) v99x8Layer->setVideo9000Active(
                video9000id,
                showV99x8 ? (showV9990 ? BACK : FRONT) : NO);
        if (v9990Layer) v9990Layer->setVideo9000Active(
                video9000id, showV9990 ? FRONT : NO);
        activeLayer = showV9990 ? v9990Layer : v99x8Layer;
        // activeLayer==nullptr is possible for renderer=none
        recalculateVideoSource();
}
 
void Video9000::recalculateVideoSource()
{
        // Disable superimpose when gfx9000 layer is selected. That way you
        // can look at the gfx9000-only output even when the video9000 software
        // enabled superimpose mode (mostly useful for debugging).
        bool superimpose = ((value & 0x18) == 0x18);
        v9990->setExternalVideoSource(
                superimpose && (videoSourceSetting.getSource() == getVideoSource()));
}
 
void Video9000::preVideoSystemChange() noexcept
{
        activeLayer = nullptr; // will be recalculated on next paint()
}
 
void Video9000::postVideoSystemChange() noexcept
{
        // We can't yet re-initialize 'activeLayer' here because the
        // new v99x8/v9990 layer may not be created yet.
}
 
void Video9000::paint(OutputSurface& output)
{
        if (!activeLayer) {
                recalculate();
        }
        // activeLayer==nullptr is possible for renderer=none, but in that case
        // the paint() method will never be called.
        activeLayer->paint(output);
}
 
void Video9000::takeRawScreenShot(unsigned height, const std::string& filename)
{
        auto* layer = dynamic_cast<VideoLayer*>(activeLayer);
        if (!layer) {
                throw CommandException("TODO");
        }
        layer->takeRawScreenShot(height, filename);
}
 
bool Video9000::signalEvent(const Event& event)
{
        int video9000id = getVideoSource();
 
        assert(getType(event) == EventType::FINISH_FRAME);
        const auto& ffe = get_event<FinishFrameEvent>(event);
        if (ffe.isSkipped()) return false;
        if (videoSourceSetting.getSource() != video9000id) return false;
 
        bool superimpose = ((value & 0x18) == 0x18);
        if (superimpose && v99x8Layer && v9990Layer &&
            (ffe.getSource() == v99x8Layer->getVideoSource())) {
                // inform V9990 about the new V99x8 frame
                v9990Layer->setSuperimposeVdpFrame(v99x8Layer->getPaintFrame());
        }
 
        bool showV9990   = ((value & 0x18) != 0x10); // v9990 or superimpose
        if (( showV9990 && v9990Layer && (ffe.getSource() == v9990Layer->getVideoSource())) ||
            (!showV9990 && v99x8Layer && (ffe.getSource() == v99x8Layer->getVideoSource()))) {
                getReactor().getEventDistributor().distributeEvent(
                        FinishFrameEvent(video9000id, video9000id, false));
        }
        return false;
}
 
void Video9000::update(const Setting& setting) noexcept
{
        VideoLayer::update(setting);
        if (&setting == &videoSourceSetting) {
                recalculateVideoSource();
        }
}
 
template<typename Archive>
void Video9000::serialize(Archive& ar, unsigned /*version*/)
{
        ar.template serializeBase<MSXDevice>(*this);
        ar.serialize("value", value);
        if constexpr (Archive::IS_LOADER) {
                recalculate();
        }
}
INSTANTIATE_SERIALIZE_METHODS(Video9000);
REGISTER_MSXDEVICE(Video9000, "Video9000");
 
} // namespace openmsx