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allegroimageloader.cpp

00001 /*      _______   __   __   __   ______   __   __   _______   __   __                 
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00008  *
00009  * Copyright (c) 2004, 2005 darkbits                        Js_./
00010  * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
00011  * Olof Naessén a.k.a jansem/yakslem                _asww7!uY`>  )\a//
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00053  */
00054 
00055 /*
00056  * For comments regarding functions please see the header file. 
00057  */
00058 
00059 #include <allegro.h>
00060 
00061 #include "guichan/allegro/allegroimageloader.hpp"
00062 #include "guichan/exception.hpp"
00063 #include "guichan/image.hpp"
00064 
00065 namespace gcn
00066 {
00067     AllegroImageLoader::AllegroImageLoader()
00068     {
00069         mBmp = NULL;
00070         mRawData = NULL;
00071     }
00072     
00073     AllegroImageLoader::~AllegroImageLoader()
00074     {
00075         if (mBmp != NULL)
00076         {
00077             destroy_bitmap(mBmp);
00078         }
00079 
00080         if (mRawData != NULL)
00081         {
00082             delete[] mRawData;
00083         }
00084     }
00085     
00086     void AllegroImageLoader::prepare(const std::string& filename)
00087     {
00088         if (mBmp != NULL)
00089         {
00090             throw GCN_EXCEPTION(std::string("Older image has not been finalized or discarded") + filename);
00091         }
00092         
00093 #if !(ALLEGRO_VERSION == 4 && ALLEGRO_SUB_VERSION == 0)
00094         int colconv = get_color_conversion();
00095 #endif
00096 
00097         set_color_conversion(COLORCONV_NONE);
00098 
00099         PALETTE pal;
00100         BITMAP *bmp = load_bitmap(filename.c_str(), pal);        
00101         
00102         if (bmp == NULL)
00103         {
00104             throw GCN_EXCEPTION(std::string("Unable to load: ") + filename);
00105         }
00106 
00107         mBmp = create_bitmap_ex(32, bmp->w, bmp->h);
00108 
00109         if (mBmp == NULL)
00110         {
00111             throw GCN_EXCEPTION(std::string("Not enough memory to load: ") + filename);
00112         }
00113         
00114         set_palette(pal);
00115         blit(bmp, mBmp, 0, 0, 0, 0, bmp->w, bmp->h);
00116         destroy_bitmap(bmp);
00117         
00118 #if (ALLEGRO_VERSION == 4 && ALLEGRO_SUB_VERSION == 0)
00119         set_color_conversion(COLORCONV_TOTAL);
00120 #else
00121         set_color_conversion(colconv);        
00122 #endif
00123         
00124     }
00125     
00126     void AllegroImageLoader::free(Image* image)
00127     {
00128         BITMAP *bmp = (BITMAP *)image->_getData();
00129         destroy_bitmap(bmp);
00130     }
00131     
00132     void* AllegroImageLoader::getRawData()
00133     {
00134         // @todo do it!
00135         throw GCN_EXCEPTION("Not implemented yet");
00136 
00137         
00138         if (mBmp == NULL)
00139         {
00140             GCN_EXCEPTION("No image seems to be loaded");
00141         }
00142         
00143         return 0;
00144     }
00145     
00146     void* AllegroImageLoader::finalize()
00147     {
00148         if (mBmp == NULL)
00149         {
00150             GCN_EXCEPTION("No image seems to be loaded");
00151         }        
00152         
00153         BITMAP *bmp = create_bitmap(mBmp->w, mBmp->h);
00154 
00155         blit(mBmp, bmp, 0, 0, 0, 0, bmp->w, bmp->h);
00156 
00157         mBmp = NULL;
00158 
00159         if (mRawData != NULL)
00160         {
00161             delete[] mRawData;
00162             mRawData = NULL;            
00163         }
00164                 
00165         return bmp;
00166     }
00167     
00168     void AllegroImageLoader::discard()
00169     {
00170         if (mBmp == NULL)
00171         {
00172             GCN_EXCEPTION("No image seems to be loaded");
00173         }                
00174         
00175         destroy_bitmap(mBmp);
00176         
00177         if (mRawData != NULL)
00178         {
00179             delete[] mRawData;
00180             mRawData = NULL;
00181         }
00182     }    
00183     
00184     int AllegroImageLoader::getHeight() const
00185     {
00186         if (mBmp == NULL)
00187         {
00188             GCN_EXCEPTION("No image seems to be loaded");
00189         }                        
00190         
00191         return mBmp->h;
00192     }
00193     
00194     int AllegroImageLoader::getWidth() const
00195     {
00196         if (mBmp == NULL)
00197         {
00198             GCN_EXCEPTION("No image seems to be loaded");
00199         }                
00200         
00201         return mBmp->w;
00202     }
00203     
00204     Color AllegroImageLoader::getPixel(int x, int y)
00205     {
00206         int c = getpixel(mBmp, x, y);
00207 
00208         return Color(getr32(c), getg32(c), getb32(c), geta(32));
00209     }
00210     
00211     void AllegroImageLoader::putPixel(int x, int y, const Color& color)
00212     {
00213         int c = makeacol_depth(32, color.r, color.g, color.b, color.a);
00214 
00215         putpixel(mBmp, x, y, c);
00216     }    
00217 }

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