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# KeosImagesLoader.cpp

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    00001 /*
    00002  * This source file is part of KEOS (Free 3D Engine)
    00003  * For the latest info, see http://www.keosengine.org/
    00004  * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
    00005  *
    00006  * This program is free software; you can redistribute it and/or modify it under
    00007  * the terms of the GNU Lesser General Public License as published by the Free Software
    00008  * Foundation; either version 2 of the License, or (at your option) any later
    00009  * version.
    00010  *
    00011  * This program is distributed in the hope that it will be useful, but WITHOUT
    00012  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    00013  * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
    00014  *
    00015  * You should have received a copy of the GNU Lesser General Public License along with
    00016  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
    00017  * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
    00018  * http://www.gnu.org/copyleft/lesser.txt.
    00019  *
    00020  */
    00021
    00022 #include "KeosImagesLoader.h"
    00023 #include "KeosImage.h"
    00024 #include "../Extlibs/DevIL/il.h"
    00025 #include "KeosPixelUtils.h"
    00026 #include "KeosLogger.h"
    00027
    00028 namespace Keos
    00029 {
    00030     //=======================================================================
    00031     // CImagesLoader implementation
    00032     //=======================================================================
    00033
    00034     //-----------------------------------------------------------------------
    00035     CImagesLoader::CImagesLoader()
    00036     {
    00037         // DevIL initialization
    00038         ilInit();
    00039
    00040         // We indicate that the origin of the images is on the upper-left corner
    00041         ilOriginFunc(IL_ORIGIN_UPPER_LEFT);
    00042         ilEnable(IL_ORIGIN_SET);
    00043
    00044         // We authorize the destruction of already existing files, for the saving
    00045         ilEnable(IL_FILE_OVERWRITE);
    00046
    00047         // We force the load of the images in 32 bits BGRA
    00048         ilSetInteger(IL_FORMAT_MODE, IL_BGRA);
    00049         ilEnable(IL_FORMAT_SET);
    00050     }
    00051
    00052     //-----------------------------------------------------------------------
    00053     CImagesLoader::~CImagesLoader()
    00054     {
    00055         // DevIL shutdown
    00056         ilShutDown();
    00057     }
    00058
    00059     //-----------------------------------------------------------------------
    00060     CImage* CImagesLoader::LoadFromFile(const String& strFilename)
    00061     {
    00062         // Generation of a new texture
    00063         ILuint Texture;
    00064         ilGenImages(1, &Texture);
    00065         ilBindImage(Texture);
    00066
    00067         // Load of the image
    00068         if (!ilLoadImage(const_cast<ILstring>(strFilename.c_str())))
    00069             LOADINGFAILED_EXCEPT(strFilename, "DevIL error : call to ilLoadImage failed","CImagesLoader::LoadFromFile");
    00070
    00071         // Image size
    00072         TVector2I Size(ilGetInteger(IL_IMAGE_WIDTH), ilGetInteger(IL_IMAGE_HEIGHT));
    00073
    00074         // Image pixels
    00075         const uchar* pPixels = ilGetData();
    00076
    00077         // Creation of the image
    00078         CImage* Image = new CImage(Size, PXF_A8R8G8B8, pPixels);
    00079
    00080         // Delete of the texture
    00081         ilBindImage(0);
    00082         ilDeleteImages(1, &Texture);
    00083
    00084         ILogger::Log("Load of the image : %s", strFilename.c_str());
    00085
    00086         return Image;
    00087     }
    00088
    00089     //-----------------------------------------------------------------------
    00090     void CImagesLoader::SaveToFile(const CImage* pObject, const String& strFilename)
    00091     {
    00092         // We create a copy of the image in a compatible format with DevIL (ARGB 32 bits)
    00093         CImage Image(pObject->GetSize(), PXF_A8R8G8B8);
    00094         Image.CopyImage(*pObject);
    00095
    00096         Image.Flip();
    00097
    00098         // Generation of a new texture
    00099         ILuint Texture;
    00100         ilGenImages(1, &Texture);
    00101         ilBindImage(Texture);
    00102
    00103         // Image size
    00104         const TVector2I& Size = Image.GetSize();
    00105
    00106         // Completion of the texture with the converted pixels
    00107         if (!ilTexImage(Size.x, Size.y, 1, GetBytesPerPixel(Image.GetFormat()), IL_BGRA, IL_UNSIGNED_BYTE, (void*)Image.GetData()))
    00108             LOADINGFAILED_EXCEPT(strFilename, "DevIL error : call to ilTexImage failed","CImagesLoader::SaveToFile");
    00109         // Save of the texture
    00110         if (!ilSaveImage(const_cast<ILstring>(strFilename.c_str())))
    00111             LOADINGFAILED_EXCEPT(strFilename, "DevIL error : call to ilSaveImage failed","CImagesLoader::SaveToFile");
    00112
    00113         // Delete of the texture
    00114         ilBindImage(0);
    00115         ilDeleteImages(1, &Texture);
    00116
    00117         ILogger::Log("Save of the image : %s", strFilename.c_str());
    00118     }
    00119
    00120 } // namespace Keos