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# csgfx/renderbuffer.h

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    00001 /*
    00002   Copyright (C) 2003-2005 by Marten Svanfeldt
    00003                              Anders Stenberg
    00004
    00005   This library is free software; you can redistribute it and/or
    00006   modify it under the terms of the GNU Library General Public
    00007   License as published by the Free Software Foundation; either
    00008   version 2 of the License, or (at your option) any later version.
    00009
    00010   This library is distributed in the hope that it will be useful,
    00011   but WITHOUT ANY WARRANTY; without even the implied warranty of
    00012   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00013   Library General Public License for more details.
    00014
    00015   You should have received a copy of the GNU Library General Public
    00016   License along with this library; if not, write to the Free
    00017   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    00018 */
    00019
    00020 #ifndef __CS_CSGFX_RENDERBUFFER_H__
    00021 #define __CS_CSGFX_RENDERBUFFER_H__
    00022
    00027 #include "csextern.h"
    00028 #include "csutil/leakguard.h"
    00029 #include "csutil/scf_implementation.h"
    00030 #include "ivideo/rndbuf.h"
    00031
    00040 struct csInterleavedSubBufferOptions
    00041 {
    00043   csRenderBufferComponentType componentType;
    00045   uint componentCount;
    00046 };
    00047
    00048 #ifdef CS_DEBUG
    00049 class csCallStack;
    00050 #endif
    00051
    00055 class CS_CRYSTALSPACE_EXPORT csRenderBuffer :
    00056   public scfImplementation1<csRenderBuffer, iRenderBuffer>
    00057 {
    00058 protected:
    00062   csRenderBuffer (size_t size, csRenderBufferType type,
    00063     csRenderBufferComponentType componentType, uint componentCount,
    00064     size_t rangeStart, size_t rangeEnd, bool copy);
    00065 public:
    00066   CS_LEAKGUARD_DECLARE (csRenderBuffer);
    00067
    00071   virtual ~csRenderBuffer ();
    00072
    00075   virtual void* Lock (csRenderBufferLockType lockType);
    00076
    00077   virtual void Release();
    00078
    00079   virtual void CopyInto (const void *data, size_t elementCount,
    00080     size_t elemOffset = 0);
    00081
    00082   virtual int GetComponentCount () const
    00083   {
    00084     return props.compCount;
    00085   }
    00086
    00087   virtual csRenderBufferComponentType GetComponentType () const
    00088   {
    00089     return props.comptype;
    00090   }
    00091
    00092   virtual csRenderBufferType GetBufferType() const
    00093   {
    00094     return props.bufferType;
    00095   }
    00096
    00097   virtual size_t GetSize() const
    00098   {
    00099     return bufferSize;
    00100   }
    00101
    00102   virtual size_t GetStride() const
    00103   {
    00104     return props.stride;
    00105   }
    00106
    00107   virtual size_t GetElementDistance() const
    00108   {
    00109     return props.stride ? props.stride :
    00110       props.compCount * csRenderBufferComponentSizes[props.comptype];
    00111   }
    00112
    00113   virtual size_t GetOffset() const
    00114   { return props.offset; }
    00115
    00117   virtual uint GetVersion ()
    00118   {
    00119     return version;
    00120   }
    00121
    00122   virtual bool IsMasterBuffer ()
    00123   {
    00124     return !masterBuffer.IsValid();
    00125   }
    00126
    00127   virtual iRenderBuffer* GetMasterBuffer () const
    00128   {
    00129     return masterBuffer;
    00130   }
    00131
    00132   virtual bool IsIndexBuffer() const
    00133   { return props.isIndex; }
    00134
    00135   virtual size_t GetRangeStart() const
    00136   { return rangeStart; }
    00137   virtual size_t GetRangeEnd() const
    00138   { return rangeEnd; }
    00139
    00140   virtual size_t GetElementCount() const;
    00160   static csRef<csRenderBuffer> CreateRenderBuffer (size_t elementCount,
    00161     csRenderBufferType type, csRenderBufferComponentType componentType,
    00162     uint componentCount, bool copy = true);
    00180   static csRef<csRenderBuffer> CreateIndexRenderBuffer (size_t elementCount,
    00181     csRenderBufferType type, csRenderBufferComponentType componentType,
    00182     size_t rangeStart, size_t rangeEnd, bool copy = true);
    00207   static csRef<csRenderBuffer> CreateInterleavedRenderBuffers (
    00208     size_t elementCount,
    00209     csRenderBufferType type, uint count,
    00210     const csInterleavedSubBufferOptions* elements,
    00211     csRef<iRenderBuffer>* buffers);
    00220   static const char* GetDescrFromBufferName (csRenderBufferName bufferName);
    00225   static csRenderBufferName GetBufferNameFromDescr (const char* name);
    00236   void SetRenderBufferProperties (size_t elementCount,
    00237     csRenderBufferType type, csRenderBufferComponentType componentType,
    00238     uint componentCount, bool copy = true);
    00239   void SetIndexBufferProperties (size_t elementCount,
    00240     csRenderBufferType type, csRenderBufferComponentType componentType,
    00241     size_t rangeStart, size_t rangeEnd, bool copy = true);
    00243 protected:
    00245   size_t bufferSize;
    00246
    00251   struct Props
    00252   {
    00254     csRenderBufferType bufferType : 2;
    00256     csRenderBufferComponentType comptype : 4;
    00257
    00259     uint compCount : 8;
    00261     size_t stride : 8;
    00263     size_t offset : 8;
    00264
    00266     bool doCopy : 1;
    00268     bool doDelete : 1;
    00270     bool isLocked : 1;
    00272     bool isIndex : 1;
    00273
    00275     uint lastLock : 2;
    00276
    00277     Props (csRenderBufferType type, csRenderBufferComponentType componentType,
    00278       uint componentCount, bool copy) : bufferType (type),
    00279       comptype (componentType), compCount (componentCount), stride(0),
    00280       offset (0), doCopy (copy), doDelete (false), isLocked (false),
    00281       isIndex (false), lastLock (CS_BUF_LOCK_NOLOCK)
    00282     {
    00283       CS_ASSERT(componentCount <= 255); // Just to be sure...
    00284     }
    00285   } props;
    00286
    00288   size_t rangeStart;
    00290   size_t rangeEnd;
    00291
    00293   unsigned int version;
    00294
    00296   unsigned char *buffer;
    00297
    00298   csRef<iRenderBuffer> masterBuffer;
    00299 #ifdef CS_DEBUG
    00300   csCallStack* lockStack;
    00301 #endif
    00302 };
    00303
    00306 #endif // __CS_CSGFX_RENDERBUFFER_H__