libreoffice/canvas/inc/canvas/rendering/isurfaceproxy.hxx

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#ifndef INCLUDED_CANVAS_ISURFACEPROXY_HXX
#define INCLUDED_CANVAS_ISURFACEPROXY_HXX

#include <canvas/rendering/irendermodule.hxx>

#include <boost/shared_ptr.hpp>

namespace basegfx
{
    class B2DRange;
    class B2DPoint;
    class B2DPolyPolygon;
    class B2DHomMatrix;
}

namespace canvas
{
    struct ISurfaceProxy
    {
        virtual ~ISurfaceProxy() {}

        /** Notify the proxy that the color buffer has changed
         */
        virtual void setColorBufferDirty() = 0;

        /** Render the surface content to screen.

            @param fAlpha
            Overall alpha for content

            @param rPos
            Output position

            @param rTransform
            Output transformation (does not affect output position)
         */
        virtual bool draw( double                         fAlpha,
                           const ::basegfx::B2DPoint&     rPos,
                           const ::basegfx::B2DHomMatrix& rTransform ) = 0;

        /** Render the surface content to screen.

            @param fAlpha
            Overall alpha for content

            @param rPos
            Output position

            @param rArea
            Subset of the surface to render. Coordinate system are
            surface area pixel, given area will be clipped to the
            surface bounds.

            @param rTransform
            Output transformation (does not affect output position)
         */
        virtual bool draw( double                         fAlpha,
                           const ::basegfx::B2DPoint&     rPos,
                           const ::basegfx::B2DRange&     rArea,
                           const ::basegfx::B2DHomMatrix& rTransform ) = 0;

        /** Render the surface content to screen.

            @param fAlpha
            Overall alpha for content

            @param rPos
            Output position

            @param rClipPoly
            Clip polygon for the surface. The clip polygon is also
            subject to the output transformation.

            @param rTransform
            Output transformation (does not affect output position)
         */
        virtual bool draw( double                           fAlpha,
                           const ::basegfx::B2DPoint&       rPos,
                           const ::basegfx::B2DPolyPolygon& rClipPoly,
                           const ::basegfx::B2DHomMatrix&   rTransform ) = 0;
    };

    typedef ::boost::shared_ptr< ISurfaceProxy > ISurfaceProxySharedPtr;
}

#endif /* INCLUDED_CANVAS_ISURFACEPROXY_HXX */