C++ ossimRefPtr::validate方法代码示例

ossimRefPtr<ossimImageData> ossimHistogramEqualization::runEqualizationAlgorithm(T, ossimRefPtr<ossimImageData> tile)
{
   
   if(!theAccumulationHistogram ||
      !getHistogram())
   {
      return tile;
   }

   // for now we will always pull from res 0 information
   ossimRefPtr<ossimMultiBandHistogram> histo = getHistogram()->getMultiBandHistogram(0);

   if(histo.valid())
   {
      ossim_uint32 maxBands = ( (histo->getNumberOfBands() >
                                 tile->getNumberOfBands())?
                                tile->getNumberOfBands():
                                histo->getNumberOfBands());
      
      long offsetUpperBound = tile->getHeight()*tile->getWidth();

      for(ossim_uint32 band = 0; band < maxBands; ++band)
      {
         ossimRefPtr<ossimHistogram> bandHisto = histo->getHistogram(band);
         T* buf = static_cast<T*>(tile->getBuf(band));
         double *histoLut = band<theForwardLut.size()?theForwardLut[band]:NULL;
         ossim_uint32 actualBand = theBandList[band];
         if(bandHisto.valid())
         {
            if(buf&&histoLut&&(actualBand <  histo->getNumberOfBands()))
            {
               if(theInverseFlag)
               {
                  histoLut = theInverseLut[actualBand];
               }
               if(histoLut)
               {
                  if(tile->getDataObjectStatus() == OSSIM_FULL)
                  {
                     T minPix = (T)tile->getMinPix(actualBand);
                     T maxPix = (T)tile->getMaxPix(actualBand);
                     for(long offset = 0; offset < offsetUpperBound; ++offset)
                     {
                        ossim_int32 idx = bandHisto->GetIndex(buf[offset]);
                           
                        if(idx>=0)
                        {
                           T value = (T)(histoLut[idx]);

                           //---
                           // Assign clamping to min max.
                           // 
                           // ESH 03/2009 -- Clamping to within min-max fixed
                           //--- 
                           buf[offset] = value < minPix ? minPix :
                              (value > maxPix ? maxPix : value);
                        }
                     }
                  }
                  else
                  {
                     T minPix  = (T)tile->getMinPix(actualBand);
                     T maxPix  = (T)tile->getMaxPix(actualBand);
                     T nullPix = (T)tile->getNullPix(actualBand);
                     for(long offset = 0; offset < offsetUpperBound; ++offset)
                     {
                        ossim_int32 idx = bandHisto->GetIndex(buf[offset]);
                        
                        if((buf[offset]!=nullPix)&&(idx>=0))
                        {
                           T value = (T)(histoLut[idx]);

                           //---
                           // Assign clamping to min max.
                           // 
                           // ESH 03/2009 -- Clamping to within min-max fixed
                           //--- 
                           buf[offset] = value < minPix ? minPix :
                              (value > maxPix ? maxPix : value);
                        }
                        else
                        {
                           buf[offset] = nullPix;
                        }
                     }
                  }
               }
            }
         }
      }
      
      tile->validate();
   }
   
   return tile;
}

//.........这里部分代码省略.........
            
            //---
            // Step 2: specify data source.  In this case we will uncompress from
            // memory so we will use "ossimJpegMemorySrc" in place of " jpeg_stdio_src".
            //---
            ossimJpegMemorySrc ( &cinfo,
                                 &(in.front()),
                                 (size_t)(in.size()) );
            
            /* Step 3: read file parameters with jpeg_read_header() */
            jpeg_read_header(&cinfo, TRUE);
            
            /* Step 4: set parameters for decompression */
            
            /* In this example, we don't need to change any of the defaults set by
             * jpeg_read_header(), so we do nothing here.
             */
            
            /* Step 5: Start decompressor */
            jpeg_start_decompress(&cinfo);
            
#if 0       /* Please leave for debug. (drb) */
            if ( traceDebug() )
            {
               ossimNotify(ossimNotifyLevel_DEBUG)
                  << "jpeg cinfo.output_width:  " << cinfo.output_width
                  << "\njpeg cinfo.output_height: " << cinfo.output_height
                  << "\n";
            }
#endif
            
            const ossim_uint32 SAMPLES    = cinfo.output_width;
            const ossim_uint32 LINES      = cinfo.output_height;
            const ossim_uint32 BANDS      = cinfo.output_components;

            if ( out.valid() )
            {
               // This will resize tile if not correct.
               out->setImageRectangleAndBands(
                  ossimIrect(0,0,(ossim_int32)SAMPLES-1,(ossim_int32)LINES-1), BANDS );
            }
            else
            {
               out = new ossimU8ImageData( 0, BANDS, SAMPLES, LINES );
               out->initialize();
            }
            
            // Get pointers to the cache tile buffers.
            std::vector<ossim_uint8*> destinationBuffer(BANDS);
            for (ossim_uint32 band = 0; band < BANDS; ++band)
            {
               destinationBuffer[band] = out->getUcharBuf(band);
            }
            
            std::vector<ossim_uint8> lineBuffer(SAMPLES * cinfo.output_components);
            JSAMPROW jbuf[1];
            jbuf[0] = (JSAMPROW) &(lineBuffer.front());
            
            while (cinfo.output_scanline < LINES)
            {
               // Read a line from the jpeg file.
               jpeg_read_scanlines(&cinfo, jbuf, 1);
               
               //---
               // Copy the line which if band interleaved by pixel the the band
               // separate buffers.
               //---
               ossim_uint32 index = 0;
               for (ossim_uint32 sample = 0; sample < SAMPLES; ++sample)         
               {
                  for (ossim_uint32 band = 0; band < BANDS; ++band)
                  {
                     destinationBuffer[band][sample] = lineBuffer[index];
                     ++index;
                  }
               }
               
               for (ossim_uint32 band = 0; band < BANDS; ++band)
               {
                  destinationBuffer[band] += SAMPLES;
               }
            }

            // Set the tile status:
            out->validate();
   
            // clean up...
            
            jpeg_finish_decompress(&cinfo);
            
         } // Matches: if (setjmp(jerr.setjmp_buffer) == 0)

         jpeg_destroy_decompress(&cinfo);
         
      } // Matches: if ( (in[0] == 0xff) ... )
      
   } // Matches: if ( in.size() > 3 )
   
   return result;
}