canvas/source/tools/surfaceproxymanager.cxx

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  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_canvas.hxx"
  33
  34 #include <canvas/rendering/isurfaceproxymanager.hxx>
  35 #include <canvas/rendering/isurfaceproxy.hxx>
  36 #include "surfaceproxy.hxx"
  37
  38 namespace canvas
  39 {
  40
  41     //////////////////////////////////////////////////////////////////////////////////
  42     // SurfaceProxyManager
  43     //////////////////////////////////////////////////////////////////////////////////
  44
  45     class SurfaceProxyManager : public ISurfaceProxyManager
  46     {
  47     public:
  48
  49         SurfaceProxyManager( const IRenderModuleSharedPtr pRenderModule ) :
  50             mpPageManager( new PageManager(pRenderModule) )
  51         {
  52         }
  53
  54         /** the whole idea is build around the concept that you create
  55             some arbitrary buffer which contains the image data and
  56             tell the texture manager about it.  from there on you can
  57             draw this image using any kind of graphics api you want.
  58             in the technical sense we allocate some space in local
  59             videomemory or AGP memory which will be filled on demand,
  60             which means if there exists any rendering operation that
  61             needs to read from this memory location.  this method
  62             creates a logical hardware surface object which uses the
  63             given color buffer as the image source.  internally this
  64             texture may be distributed to several real hardware
  65             surfaces.
  66         */
  67         virtual ISurfaceProxySharedPtr createSurfaceProxy( const IColorBufferSharedPtr& pBuffer ) const
  68         {
  69             // not much to do for now, simply allocate a new surface
  70             // proxy from our internal pool and initialize this thing
  71             // properly. we *don't* create a hardware surface for now.
  72             return SurfaceProxySharedPtr(new SurfaceProxy(pBuffer,mpPageManager));
  73         }
  74
  75     private:
  76         PageManagerSharedPtr mpPageManager;
  77     };
  78
  79     //////////////////////////////////////////////////////////////////////////////////
  80     // createSurfaceProxyManager
  81     //////////////////////////////////////////////////////////////////////////////////
  82
  83     ISurfaceProxyManagerSharedPtr createSurfaceProxyManager( const IRenderModuleSharedPtr& rRenderModule )
  84     {
  85         return ISurfaceProxyManagerSharedPtr(
  86             new SurfaceProxyManager(
  87                 rRenderModule));
  88     }
  89 }