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 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
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#ifndef INCLUDED_CPPCANVAS_SOURCE_MTFRENDERER_CACHEDPRIMITIVEBASE_HXX
#define INCLUDED_CPPCANVAS_SOURCE_MTFRENDERER_CACHEDPRIMITIVEBASE_HXX

#include <com/sun/star/uno/Reference.hxx>
#include <com/sun/star/rendering/XCanvas.hpp>

#include <cppcanvas/canvas.hxx>

#include <action.hxx>

namespace basegfx { class B2DHomMatrix; }


/* Definition of internal::CachedPrimitiveBase class */

namespace cppcanvas
{
    namespace internal
    {
        /** Base class providing cached re-rendering, if XCanvas
            returns XCachedPrimitive

            Derive from this class and implement private render()
            method to perform the actual primitive rendering. Return
            cached primitive into given reference. Next time this
            class' public render() method gets called, the cached
            representation is taken.
         */
        class CachedPrimitiveBase : public Action
        {
        public:
            /** Constructor

                @param rCanvas
                Canvas on which this primitive is to appear

                @param bOnlyRedrawWithSameTransform
                When true, this class only reuses the cached
                primitive, if the overall transformation stays the
                same. Otherwise, repaints are always performed via the
                cached primitive.
             */
            CachedPrimitiveBase( const CanvasSharedPtr& rCanvas,
                                 bool                   bOnlyRedrawWithSameTransform );

            CachedPrimitiveBase(const CachedPrimitiveBase&) = delete;
            const CachedPrimitiveBase& operator=(const CachedPrimitiveBase&) = delete;

            virtual bool render( const ::basegfx::B2DHomMatrix& rTransformation ) const override;

        protected:
            using Action::render;

        private:
            virtual bool renderPrimitive( css::uno::Reference< css::rendering::XCachedPrimitive >& rCachedPrimitive,
                                          const ::basegfx::B2DHomMatrix& rTransformation ) const = 0;

            CanvasSharedPtr                                                 mpCanvas;
            mutable css::uno::Reference< css::rendering::XCachedPrimitive > mxCachedPrimitive;
            mutable ::basegfx::B2DHomMatrix                                 maLastTransformation;
            const bool                                                      mbOnlyRedrawWithSameTransform;
        };
    }
}

#endif // INCLUDED_CPPCANVAS_SOURCE_MTFRENDERER_CACHEDPRIMITIVEBASE_HXX

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