Source/System/Image/FileIO/OSGCHDRImageFileType.cpp

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  37 \*---------------------------------------------------------------------------*/
  38
  39 //-------------------------------
  40 //      Includes
  41 //-------------------------------
  42
  43 #include <cstdlib>
  44 #include <cstdio>
  45 #include <cmath>
  46 #include <memory.h>
  47
  48 #include "OSGConfig.h"
  49
  50 #include <iostream>
  51 #include <fstream>
  52
  53 #include "OSGLog.h"
  54 #include "OSGImageFileHandler.h"
  55 #include "OSGPathHandler.h"
  56 #include "OSGFileSystem.h"
  57 #include "OSGImageFunctions.h"
  58
  59 #include "OSGCHDRImageFileType.h"
  60
  61 // Static Class Varible implementations:
  62 static const OSG::Char8 *suffixArray[] =
  63 {
  64     "chdr"
  65 };
  66
  67 OSG_BEGIN_NAMESPACE
  68
  69 /*! \class HDRImageFileType
  70
  71 Image File Type to read/write and store/restore Image objects as
  72 HDR data.
  73
  74 All the type specific code is included in the class. Does
  75 not depend on external libs.
  76
  77  */
  78
  79 /*****************************
  80  *   Types
  81  *****************************/
  82
  83 CHDRImageFileType CHDRImageFileType::_the("chdr",
  84                                           suffixArray, sizeof(suffixArray),
  85                                           OSG_READ_SUPPORTED);
  86
  87
  88 /*****************************
  89  *    Classvariables
  90  *****************************/
  91
  92
  93 /********************************
  94  *    Class methodes
  95  *******************************/
  96
  97
  98 /*******************************
  99 *public
 100 *******************************/
 101
 102 //-------------------------------------------------------------------------
 103 /*!
 104   Tries to fill the image object with the data read from
 105   the given input stream. Returns true on success.
 106 */
 107
 108 bool CHDRImageFileType::read(      Image        *image,
 109                                    std::istream &is,
 110                              const std::string  &mimetype)
 111 {
 112     ImageUnrecPtr pTmpImage = Image::create();
 113
 114     bool returnValue   = Inherited::read(pTmpImage, is, mimetype);
 115
 116     if(returnValue == false)
 117     {
 118         pTmpImage = NULL;
 119
 120         return returnValue;
 121     }
 122
 123
 124     returnValue = convertCrossToCubeMap(pTmpImage,
 125                                         image);
 126
 127     pTmpImage = NULL;
 128
 129     return returnValue;
 130 }
 131
 132 //-------------------------------------------------------------------------
 133 /*!
 134   Tries to write the image object to the given output stream.
 135   Returns true on success.
 136 */
 137
 138 bool CHDRImageFileType::write(const Image        *image,
 139                                     std::ostream &os,
 140                               const std::string  &mimetype)
 141 {
 142 #if 0
 143     if(image->getDataType() != Image::OSG_FLOAT32_IMAGEDATA)
 144     {
 145         FWARNING(("HDRImageFileType::write: Image has non float data "
 146                   "type!\n"));
 147         return false;
 148     }
 149
 150     if(!os.good())
 151         return false;
 152
 153     int width  = image->getWidth();
 154     int height = image->getHeight();
 155
 156     os << "#?RADIANCE" << std::endl;
 157     os << "# Written with OpenSG" << std::endl;
 158     os << "FORMAT=32-bit_rle_rgbe" << std::endl;
 159     os << "EXPOSURE=" << 1.0f << std::endl << std::endl;
 160     os << "-Y " << height << " +X " << width << std::endl;
 161
 162     RGBE *rgbe_scan = new RGBE[width];
 163
 164     Real32 *data = ((Real32 *)(image->getData()));
 165
 166     //upside down !!!
 167     for(int y=height-1;y>=0;y--)
 168     {
 169         if (fwritecolrs(os,
 170                         &data[y * width * 3],
 171                         rgbe_scan,
 172                         width,
 173                         height) < 0)
 174         {
 175             delete [] rgbe_scan;
 176             return false;
 177         }
 178     }
 179
 180     delete [] rgbe_scan;
 181 #endif
 182
 183     return true;
 184 }
 185
 186 //-------------------------------------------------------------------------
 187 /*!
 188   Tries to restore the image data from the given memblock.
 189   Returns the amount of data read.
 190 */
 191
 192 UInt64 CHDRImageFileType::restoreData(      Image  *image,
 193                                       const UChar8 *buffer,
 194                                             Int32         ) const
 195 {
 196     image->setData(buffer);
 197
 198     return image->getSize();
 199 }
 200
 201 //-------------------------------------------------------------------------
 202 /*!
 203   Tries to store the image data to the given memblock.
 204   Returns the amount of data written.
 205 */
 206
 207 UInt64 CHDRImageFileType::storeData(const Image  *image,
 208                                           UChar8 *buffer,
 209                                           Int32   OSG_CHECK_ARG(memSize)) const
 210 {
 211     UInt32 dataSize = image->getSize();
 212
 213     const UChar8 *src = image->getData();
 214
 215     if(dataSize && src && buffer)
 216         memcpy(buffer, src, dataSize);
 217
 218     return dataSize;
 219 }
 220
 221
 222 //-------------------------------------------------------------------------
 223 /*!
 224   Constructor used for the singleton object
 225 */
 226
 227 CHDRImageFileType::CHDRImageFileType(const Char8 *mimeType,
 228                                      const Char8 *suffixArray[],
 229                                            UInt16 suffixByteCount,
 230                                            UInt32 flags          ) :
 231     Inherited(mimeType,
 232               suffixArray,
 233               suffixByteCount,
 234               flags )
 235 {
 236 }
 237
 238 //-------------------------------------------------------------------------
 239 /*!
 240   Destructor
 241 */
 242
 243 CHDRImageFileType::~CHDRImageFileType(void)
 244 {
 245 }
 246
 247 OSG_END_NAMESPACE