pagemanager.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#pragma once
 
#include <basegfx/vector/b2isize.hxx>
#include <rendering/irendermodule.hxx>
#include <utility>
 
#include "page.hxx"
 
namespace canvas
{
    // PageManager
    class PageManager
    {
    public:
        explicit PageManager(std::shared_ptr<canvas::IRenderModule> xRenderModule)
            : mpRenderModule(std::move(xRenderModule))
        {
        }
 
        // returns the maximum size of a hardware
        // accelerated page, e.g. OpenGL texture.
        ::basegfx::B2ISize getPageSize() const;
 
        const std::shared_ptr<canvas::IRenderModule>& getRenderModule() const { return mpRenderModule; }
 
        FragmentSharedPtr allocateSpace( const ::basegfx::B2ISize& rSize );
        void              free( const FragmentSharedPtr& pFragment );
 
        void              nakedFragment( const FragmentSharedPtr& pFragment );
 
        void              validatePages();
 
    private:
        // the pagemanager needs access to the rendermodule
        // since we query for system resources from it.
        std::shared_ptr<canvas::IRenderModule> mpRenderModule;
 
        // here we collect all fragments that will be created
        // since we need them for relocation purposes.
        typedef std::vector<FragmentSharedPtr> FragmentContainer_t;
        FragmentContainer_t maFragments;
 
        // this is the container holding all created pages,
        // behind the scenes these are real hardware surfaces.
        std::vector<PageSharedPtr> maPages;
 
        bool relocate( const FragmentSharedPtr& pFragment );
    };
 
 
    // PageManagerSharedPtr
 
 
    typedef std::shared_ptr< PageManager > PageManagerSharedPtr;
}
 
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