Function readPalette

mapimageio.c:318–362

}

int readPalette(const char *palette, rgbaPixel *entries, unsigned int *nEntries, int useAlpha) {
   FILE *stream = NULL;
   char buffer[MS_BUFFER_LENGTH];
   int r,g,b,a;
   *nEntries = 0;
   
   stream = fopen(palette, "r");
   if(!stream) {
    msSetError(MS_IOERR, "Error opening palette file %s.", "readPalette()", palette);
    return MS_FAILURE;
   }
   
   while(fgets(buffer, MS_BUFFER_LENGTH, stream) && *nEntries<256) 
   { /* while there are colors to load */
      if(buffer[0] == '#' || buffer[0] == '\n' || buffer[0] == '\r')
        continue; /* skip comments and blank lines */
      if(!useAlpha) {
         if(3 != sscanf(buffer,"%d,%d,%d\n",&r,&g,&b)) {
            msSetError(MS_MISCERR,"failed to parse color %d r,g,b triplet in line \"%s\" from file %s","readPalette()",*nEntries+1,buffer,palette);
            return MS_FAILURE;
         }
      }
      else {
         if(4 != sscanf(buffer,"%d,%d,%d,%d\n",&r,&g,&b,&a)) {
            msSetError(MS_MISCERR,"failed to parse color %d r,g,b,a quadruplet in line \"%s\" from file %s","readPalette()",*nEntries+1,buffer,palette);
            return MS_FAILURE;
         }
      }
      if(useAlpha && a != 255) {
         double da = a/255.0;
         entries[*nEntries].r = r * da;
         entries[*nEntries].g = g * da;
         entries[*nEntries].b = b * da;
         entries[*nEntries].a = a;
      } else {
         entries[*nEntries].r = r;
         entries[*nEntries].g = g;
         entries[*nEntries].b = b;
         entries[*nEntries].a = 255;
      }
      (*nEntries)++;
   }
   fclose(stream);
   return MS_SUCCESS;
}

int saveAsPNG(mapObj *map,rasterBufferObj *rb, streamInfo *info, outputFormatObj *format) {
    int force_pc256 = MS_FALSE;