VideoLayer.hh

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#ifndef VIDEOLAYER_HH
#define VIDEOLAYER_HH
 
#include "VideoSourceSetting.hh"
#include "Layer.hh"
#include "Observer.hh"
#include "MSXEventListener.hh"
#include <string>
 
namespace openmsx {
 
class MSXMotherBoard;
class Display;
class Setting;
class BooleanSetting;
 
class VideoLayer : public Layer, protected Observer<Setting>
                 , private MSXEventListener
{
public:
        VideoLayer(const VideoLayer&) = delete;
        VideoLayer(VideoLayer&&) = delete;
        VideoLayer& operator=(const VideoLayer&) = delete;
        VideoLayer& operator=(VideoLayer&&) = delete;
 
        [[nodiscard]] int getVideoSource() const;
        [[nodiscard]] int getVideoSourceSetting() const;
 
        virtual void takeRawScreenShot(
                unsigned height, const std::string& filename) = 0;
 
        // We used to test whether a Layer is active by looking at the
        // Z-coordinate (Z_MSX_ACTIVE vs Z_MSX_PASSIVE). Though in case of
        // Video9000 it's possible the Video9000 layer is selected, but we
        // still need to render this layer (the v99x8 or v9990 layer).
        enum Video9000Active { INACTIVE, ACTIVE_FRONT, ACTIVE_BACK };
        void setVideo9000Active(int video9000Source_, Video9000Active active) {
                video9000Source = video9000Source_;
                activeVideo9000 = active;
        }
        [[nodiscard]] bool needRender() const;
        [[nodiscard]] bool needRecord() const;
 
protected:
        VideoLayer(MSXMotherBoard& motherBoard,
                   const std::string& videoSource);
        ~VideoLayer() override;
 
        // Observer<Setting> interface:
        void update(const Setting& setting) noexcept override;
 
private:
        void calcZ();
        void calcCoverage();
 
        // MSXEventListener
        void signalMSXEvent(const Event& event,
                            EmuTime::param time) noexcept override;
 
private:
        MSXMotherBoard& motherBoard;
        Display& display;
        VideoSourceSetting& videoSourceSetting;
        VideoSourceActivator videoSourceActivator;
        BooleanSetting& powerSetting;
 
        int video9000Source = 0;
        Video9000Active activeVideo9000 = INACTIVE;
};
 
} // namespace openmsx
 
#endif