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# csplugincommon/imageloader/commonimagefile.h

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    00001 /*
    00002     Copyright (C) 2005 by Jorrit Tyberghein
    00003                   2005 by Frank Richter
    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_CSPLUGINCOMMON_IMAGELOADER_COMMONIMAGEFILE_H__
    00021 #define __CS_CSPLUGINCOMMON_IMAGELOADER_COMMONIMAGEFILE_H__
    00022
    00027 #include "csextern.h"
    00028 #include "csgfx/imagememory.h"
    00029 #include "csutil/ref.h"
    00030 #include "csutil/scf_interface.h"
    00031 #include "csutil/scf_implementation.h"
    00032 #include "iutil/databuff.h"
    00033 #include "iutil/job.h"
    00034
    00035 struct iObjectRegistry;
    00036
    00045 enum csLoaderDataType
    00046 {
    00048   rdtInvalid,
    00050   rdtR8G8B8,
    00052   rdtRGBpixel,
    00054   rdtIndexed
    00055 };
    00056
    00057 class csCommonImageFile;
    00058
    00063 struct iImageFileLoader : public virtual iBase
    00064 {
    00065   SCF_INTERFACE(iImageFileLoader, 2,0,0);
    00067   virtual bool LoadData () = 0;
    00069   virtual csRef<iDataBuffer> GetRawData() = 0;
    00071   virtual csLoaderDataType GetDataType() = 0;
    00073   virtual int GetWidth() = 0;
    00075   virtual int GetHeight() = 0;
    00077   virtual int GetFormat() = 0;
    00079   virtual void ApplyTo (csImageMemory* image) = 0;
    00081   virtual bool HasKeyColor() const = 0;
    00083   virtual void GetKeyColor (int &r, int &g, int &b) const = 0;
    00084 };
    00085
    00089 class CS_CRYSTALSPACE_EXPORT csCommonImageFileLoader :
    00090   public scfImplementation1<csCommonImageFileLoader, iImageFileLoader>
    00091 {
    00092 protected:
    00094   int Format;
    00096   csRef<iDataBuffer> rawData;
    00098   csLoaderDataType dataType;
    00100   csRGBpixel* rgbaData;
    00102   uint8* indexData;
    00104   csRGBpixel* palette;
    00106   size_t paletteCount;
    00108   uint8* alpha;
    00110   bool hasKeycolor;
    00112   csRGBcolor keycolor;
    00114   int Width, Height;
    00115 public:
    00116   csCommonImageFileLoader (int format);
    00117   virtual ~csCommonImageFileLoader();
    00118
    00119   virtual csRef<iDataBuffer> GetRawData()
    00120   { return rawData; }
    00121   virtual csLoaderDataType GetDataType()
    00122   { return dataType; }
    00123   virtual int GetWidth() { return Width; }
    00124   virtual int GetHeight() { return Height; }
    00125   virtual int GetFormat() { return Format; }
    00126   virtual void ApplyTo (csImageMemory* image);
    00127   virtual bool HasKeyColor() const { return hasKeycolor; }
    00128   virtual void GetKeyColor (int &r, int &g, int &b) const
    00129   {
    00130     r = keycolor.red; g = keycolor.green; b = keycolor.blue;
    00131   }
    00132 };
    00133
    00134 #define THREADED_LOADING
    00135
    00139 class CS_CRYSTALSPACE_EXPORT csCommonImageFile :
    00140   public scfImplementationExt0<csCommonImageFile, csImageMemory>
    00141 {
    00142 protected:
    00143   friend class csCommonImageFileLoader;
    00144
    00145   class CS_CRYSTALSPACE_EXPORT LoaderJob :
    00146     public scfImplementation1<LoaderJob, iJob>
    00147   {
    00148   public:
    00150     csRef<iImageFileLoader> currentLoader;
    00152     bool loadResult;
    00154     LoaderJob (iImageFileLoader* loader);
    00155     virtual ~LoaderJob();
    00156
    00157     virtual void Run();
    00158   };
    00159
    00160 #ifdef THREADED_LOADING
    00162   csRef<LoaderJob> loadJob;
    00164   csRef<iJobQueue> jobQueue;
    00165 #else
    00166   csRef<iImageFileLoader> currentLoader;
    00167 #endif
    00168   iObjectRegistry* object_reg;
    00169
    00170   csCommonImageFile (iObjectRegistry* object_reg, int format);
    00171   virtual ~csCommonImageFile();
    00172
    00174   virtual bool Load (csRef<iDataBuffer> source);
    00181   virtual csRef<iImageFileLoader> InitLoader (csRef<iDataBuffer> source) = 0;
    00182
    00184   void WaitForJob() const;
    00186   void MakeImageData();
    00187
    00188   virtual const void *GetImageData ();
    00189   virtual const csRGBpixel* GetPalette ();
    00190   virtual const uint8* GetAlpha ();
    00191
    00192   virtual bool HasKeyColor () const
    00193   {
    00194 #ifdef THREADED_LOADING
    00195     if (loadJob)
    00196     {
    00197       return loadJob->currentLoader->HasKeyColor();
    00198     }
    00199 #endif
    00200     return has_keycolour;
    00201   }
    00202
    00203   virtual void GetKeyColor (int &r, int &g, int &b) const
    00204   {
    00205 #ifdef THREADED_LOADING
    00206     if (loadJob)
    00207     {
    00208       // Keycolor may only be available after loading...
    00209       WaitForJob();
    00210       loadJob->currentLoader->GetKeyColor (r, g, b);
    00211       return;
    00212     }
    00213 #endif
    00214     r = keycolour.red; g = keycolour.green; b = keycolour.blue;
    00215   }
    00216
    00221   static const char* DataTypeString (csLoaderDataType dataType);
    00222   virtual const char* GetRawFormat() const;
    00223   virtual csRef<iDataBuffer> GetRawData() const;
    00224 };
    00225
    00228 #endif // __CS_CSPLUGINCOMMON_IMAGELOADER_COMMONIMAGEFILE_H__