dx_surfacebitmap.hxx

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#ifndef INCLUDED_CANVAS_SOURCE_DIRECTX_DX_SURFACEBITMAP_HXX
#define INCLUDED_CANVAS_SOURCE_DIRECTX_DX_SURFACEBITMAP_HXX

#include <canvas/rendering/isurfaceproxy.hxx>
#include <canvas/rendering/isurfaceproxymanager.hxx>
#include "dx_ibitmap.hxx"
#include "dx_canvasfont.hxx"
#include "dx_gdiplususer.hxx"
#include "dx_rendermodule.hxx"

namespace dxcanvas
{
    class DXSurfaceBitmap : public IBitmap
    {
    public:
        DXSurfaceBitmap( const ::basegfx::B2IVector&                    rSize,
                         const std::shared_ptr<canvas::ISurfaceProxyManager>&   rMgr,
                         const IDXRenderModuleSharedPtr&                rRenderModule,
                         bool                                           bWithAlpha );

        bool resize( const ::basegfx::B2IVector& rSize );
        void clear();

        virtual GraphicsSharedPtr         getGraphics() override;

        virtual BitmapSharedPtr           getBitmap() const override;
        virtual ::basegfx::B2IVector      getSize() const override;
        virtual bool                      hasAlpha() const override;

        COMReference<surface_type>              getSurface() const { return mpSurface; }

        bool draw( double                           fAlpha,
                   const ::basegfx::B2DPoint&       rPos,
                   const ::basegfx::B2DHomMatrix&   rTransform );

        bool draw( const ::basegfx::B2IRange&       rArea );

        bool draw( double                           fAlpha,
                   const ::basegfx::B2DPoint&       rPos,
                   const ::basegfx::B2DRange&       rArea,
                   const ::basegfx::B2DHomMatrix&   rTransform );

        bool draw( double                           fAlpha,
                   const ::basegfx::B2DPoint&       rPos,
                   const ::basegfx::B2DPolyPolygon& rClipPoly,
                   const ::basegfx::B2DHomMatrix&   rTransform );

        virtual css::uno::Sequence< sal_Int8 > getData(
            css::rendering::IntegerBitmapLayout&       bitmapLayout,
            const css::geometry::IntegerRectangle2D&   rect ) override;

        virtual void setData(
            const css::uno::Sequence< sal_Int8 >&      data,
            const css::rendering::IntegerBitmapLayout& bitmapLayout,
            const css::geometry::IntegerRectangle2D&   rect ) override;

        virtual void setPixel(
            const css::uno::Sequence< sal_Int8 >&      color,
            const css::rendering::IntegerBitmapLayout& bitmapLayout,
            const css::geometry::IntegerPoint2D&       pos ) override;

        virtual css::uno::Sequence< sal_Int8 > getPixel(
            css::rendering::IntegerBitmapLayout&       bitmapLayout,
            const css::geometry::IntegerPoint2D&       pos ) override;

    private:
        void init();

        // Refcounted global GDI+ state container
        GDIPlusUserSharedPtr mpGdiPlusUser;

        // size of this image in pixels [integral unit]
        ::basegfx::B2IVector maSize;

        // pointer to the rendermodule, needed to create surfaces
        // which are used as container for the actual pixel data.
        // generally we could use any kind of storage, but GDI+
        // is not willing to render antialiased fonts unless we
        // use this special kind of container, don't ask me why...
        IDXRenderModuleSharedPtr mpRenderModule;

        // pointer to the surface manager, needed in case clients
        // want to resize the bitmap.
        std::shared_ptr<canvas::ISurfaceProxyManager> mpSurfaceManager;

        // access point to the surface proxy which handles
        // the hardware-dependent rendering stuff.
        std::shared_ptr< canvas::ISurfaceProxy > mpSurfaceProxy;

        // container for pixel data, we need to use a directx
        // surface since GDI+ sucks...
        COMReference<surface_type> mpSurface;

        // since GDI+ does not work correctly in case we
        // run on a 16bit display [don't ask me why] we need
        // to occasionally render to a native GDI+ bitmap.
        BitmapSharedPtr mpGDIPlusBitmap;
        // Graphics for the mpGDIPlusBitmap
        GraphicsSharedPtr mpGraphics;

        // internal implementation of the iColorBuffer interface
        std::shared_ptr<canvas::IColorBuffer> mpColorBuffer;

        // indicates whether the associated surface needs
        // to refresh its contents or not. in other words,
        // this flag is set iff both representations are
        // out of sync.
        mutable bool mbIsSurfaceDirty;

        // true if the bitmap contains an alpha channel
        bool mbAlpha;
    };

    typedef std::shared_ptr< DXSurfaceBitmap > DXSurfaceBitmapSharedPtr;
}

#endif

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