surface.hxx

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#pragma once
 
#include <basegfx/point/b2ipoint.hxx>
#include <basegfx/point/b2dpoint.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/range/b2drectangle.hxx>
#include <basegfx/vector/b2isize.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <rendering/icolorbuffer.hxx>
 
#include "pagemanager.hxx"
 
namespace canvas
{
    class Surface
    {
    public:
 
        Surface( PageManagerSharedPtr         xPageManager,
                 std::shared_ptr<IColorBuffer> xColorBuffer,
                 const ::basegfx::B2IPoint&   rPos,
                 const ::basegfx::B2ISize&    rSize );
        ~Surface();
 
        void setColorBufferDirty();
 
        bool draw( double                         fAlpha,
                   const ::basegfx::B2DPoint&     rPos,
                   const ::basegfx::B2DHomMatrix& rTransform );
 
        bool drawRectangularArea(
            double                         fAlpha,
            const ::basegfx::B2DPoint&     rPos,
            const ::basegfx::B2DRectangle& rArea,
            const ::basegfx::B2DHomMatrix& rTransform );
 
        bool drawWithClip( double                           fAlpha,
                           const ::basegfx::B2DPoint&       rPos,
                           const ::basegfx::B2DPolygon&     rClipPoly,
                           const ::basegfx::B2DHomMatrix&   rTransform );
 
    private:
        std::shared_ptr<IColorBuffer> mpColorBuffer;
 
        // invoking any of the above defined 'draw' methods
        // will forward primitive commands to the rendermodule.
        PageManagerSharedPtr  mpPageManager;
 
        FragmentSharedPtr     mpFragment;
 
        // the offset of this surface with regard to the source
        // image. if the source image had to be tiled into multiple
        // surfaces, this offset denotes the relative pixel distance
        // from the source image's upper, left corner
        ::basegfx::B2IPoint   maSourceOffset;
 
        // the size in pixels of this surface. please note that
        // this size is likely to be smaller than the size of
        // the colorbuffer we're associated with since we
        // maybe represent only a part of it.
        ::basegfx::B2ISize    maSize;
 
        bool                  mbIsDirty;
 
    private:
        void prepareRendering();
 
        basegfx::B2DRectangle getUVCoords() const;
        basegfx::B2DRectangle getUVCoords( const ::basegfx::B2IPoint& rPos,
                                           const ::basegfx::B2ISize&  rSize ) const;
    };
 
    typedef std::shared_ptr< Surface > SurfaceSharedPtr;
}
 
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