PaintDevice.h

#pragma once

namespace ParaEngine
{
    class CPaintEngine;
    class CPainter;

    class CPaintDevice
    {
    protected:
        int32        painters;
    public:
        enum PaintDeviceMetric {
            PdmWidth = 1,
            PdmHeight,
            PdmDepth,
        };

        virtual ~CPaintDevice();

        virtual int devType() const;
        inline bool paintingActive() const{
            return (painters != 0);
        };
        
        virtual CPaintEngine * paintEngine() const = 0;

        int width() const { return metric(PdmWidth); }
        int height() const { return metric(PdmHeight); }
        int depth() const { return metric(PdmDepth); }
        
        virtual float GetUIScalingX() const { return 1.f; }
        virtual float GetUIScalingY() const { return 1.f; }
        virtual float GetViewportLeft() const { return 0.f; };
        virtual float GetViewportTop() const { return 0.f; };
    protected:
        CPaintDevice();
        virtual int metric(PaintDeviceMetric metric) const;
        virtual void initPainter(CPainter *painter) const;
        virtual CPainter *sharedPainter() const;

        friend class CPainter;
    };
}