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main.cpp

///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
// 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// *       Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// *       Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// *       Neither the name of Industrial Light & Magic nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission. 
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
///////////////////////////////////////////////////////////////////////////


//-----------------------------------------------------------------------------
//
//    exrenvmap -- makes OpenEXR environment maps
//
//-----------------------------------------------------------------------------

#include <makeCubeMap.h>
#include <makeLatLongMap.h>
#include <ImfEnvmap.h>
#include <iostream>
#include <exception>
#include <stdlib.h>

using namespace Imf;
using namespace std;


namespace {

void
usageMessage (const char argv0[], bool verbose = false)
{
    cerr << "usage: " << argv0 << " [options] infile outfile" << endl;

    if (verbose)
    {
      cerr << "\n"
            "Converts OpenEXR latitude-longitude environment maps\n"
            "into cube-face environment maps or vice versa.\n"
            "Reads an environment map image from infile, converts\n"
            "it, and stores the result in outfile.\n"
            "\n"
            "Options:\n"
            "\n"
            "-o         produces a ONE_LEVEL output file (default)\n"
            "\n"
            "-m         produces a MIPMAP_LEVELS output file\n"
            "\n"
            "-c         the output file will be a cube-face environment\n"
              "           map (default)\n"
            "\n"
            "-l         the output file will be a latitude-longitude\n"
              "           environment map\n"
            "\n"
            "-w x       sets the width of the output image to x pixels\n"
              "           (default is 256).  The height of the output image\n"
              "           will be x*6 pixels for a cube-face map, or x/2\n"
              "           pixels for a latitude-longitude map.\n"
            "\n"
            "-f r n     sets the antialiasing filter radius to r\n"
              "           (default is 1.0) and the sampling rate to\n"
              "           n by n (default is 5 by 5).  Increasing r\n"
            "           makes the output image blurrier; decreasing r\n"
            "           makes the image sharper but may cause aliasing.\n"
            "           Increasing n improves antialiasing, but\n"
            "           generating the output image takes longer.\n"
            "\n"
            "-t x y     sets the output file's tile size to x by y pixels\n"
              "           (default is 64 by 64)\n"
            "\n"
            "-p t b     if the input image is a latitude-longitude map,\n"
              "           pad the image at the top and bottom with t*h\n"
              "           and b*h extra scan lines, where h is the height\n"
              "           of the input image.  This is useful for images\n"
              "           from 360-degree panoramic scans that cover\n"
              "           less than 180 degrees vertically.\n"
            "\n"
            "-d         sets level size rounding to ROUND_DOWN (default)\n"
            "\n"
            "-u         sets level size rounding to ROUND_UP\n"
            "\n"
            "-z x       sets the data compression method to x\n"
            "           (none/rle/zip/piz/pxr24/b44/b44a, default is zip)\n"
            "\n"
            "-v         verbose mode\n"
            "\n"
            "-h         prints this message\n";

       cerr << endl;
    }

    exit (1);
}


Compression
getCompression (const string &str)
{
    Compression c;

    if (str == "no" || str == "none" || str == "NO" || str == "NONE")
    {
      c = NO_COMPRESSION;
    }
    else if (str == "rle" || str == "RLE")
    {
      c = RLE_COMPRESSION;
    }
    else if (str == "zip" || str == "ZIP")
    {
      c = ZIP_COMPRESSION;
    }
    else if (str == "piz" || str == "PIZ")
    {
      c = PIZ_COMPRESSION;
    }
    else if (str == "pxr24" || str == "PXR24")
    {
      c = PXR24_COMPRESSION;
    }
    else if (str == "b44" || str == "B44")
    {
      c = B44_COMPRESSION;
    }
    else if (str == "b44a" || str == "B44A")
    {
      c = B44A_COMPRESSION;
    }
    else
    {
      cerr << "Unknown compression method \"" << str << "\"." << endl;
      exit (1);
    }

    return c;
}

} // namespace


int
main(int argc, char **argv)
{
    const char *inFile = 0;
    const char *outFile = 0;
    Envmap type = ENVMAP_CUBE;
    LevelMode levelMode = ONE_LEVEL;
    LevelRoundingMode roundingMode = ROUND_DOWN;
    Compression compression = ZIP_COMPRESSION;
    int mapWidth = 256;
    int tileWidth = 64;
    int tileHeight = 64;
    float padTop = 0;
    float padBottom = 0;
    float filterRadius = 1;
    int numSamples = 5;
    bool verbose = false;

    //
    // Parse the command line.
    //

    if (argc < 2)
      usageMessage (argv[0], true);

    int i = 1;

    while (i < argc)
    {
      if (!strcmp (argv[i], "-o"))  
      {
          //
          // generate a ONE_LEVEL image
          //

          levelMode = ONE_LEVEL;
          i += 1;
      }
      else if (!strcmp (argv[i], "-m"))
      {
          //
          // Generate a MIPMAP_LEVELS image
          //

          levelMode = MIPMAP_LEVELS;
          i += 1;
      }
      else if (!strcmp (argv[i], "-c"))
      {
          //
          // Generate a cube-face map
          //

          type = ENVMAP_CUBE;
          i += 1;
      }
      else if (!strcmp (argv[i], "-l"))
      {
          //
          // Generate a latitude-longitude map
          //

          type = ENVMAP_LATLONG;
          i += 1;
      }
      else if (!strcmp (argv[i], "-w"))
      {
          //
          // Set output image width
          //

          if (i > argc - 2)
            usageMessage (argv[0]);

          mapWidth = strtol (argv[i + 1], 0, 0);

          if (mapWidth <= 0)
          {
            cerr << "Output image width must be greater than zero." << endl;
            return 1;
          }

          i += 2;
      }
      else if (!strcmp (argv[i], "-f"))
      {
          //
          // Set filter radius and supersampling rate
          //

          if (i > argc - 3)
            usageMessage (argv[0]);

          filterRadius = strtod (argv[i + 1], 0);
          numSamples   = strtol (argv[i + 2], 0, 0);

          if (filterRadius < 0)
          {
            cerr << "Filter radius must not be less than zero." << endl;
            return 1;
          }

          if (numSamples <= 0)
          {
            cerr << "Sampling rate must be greater than zero." << endl;
            return 1;
          }

          i += 3;
      }
      else if (!strcmp (argv[i], "-t"))
      {
          //
          // Set tile size
          //

          if (i > argc - 3)
            usageMessage (argv[0]);

          tileWidth  = strtol (argv[i + 1], 0, 0);
          tileHeight = strtol (argv[i + 2], 0, 0);

          if (tileWidth <= 0 || tileHeight <= 0)
          {
            cerr << "Tile size must be greater than zero." << endl;
            return 1;
          }

          i += 3;
      }
      else if (!strcmp (argv[i], "-p"))
      {
          //
          // Set top and bottom padding
          //

          if (i > argc - 3)
            usageMessage (argv[0]);

          padTop    = strtod (argv[i + 1], 0);
          padBottom = strtod (argv[i + 2], 0);

          if (padTop < 0 || padBottom < 0)
          {
            cerr << "Padding must not be less than zero." << endl;
            return 1;
          }

          i += 3;
      }
      else if (!strcmp (argv[i], "-d"))
      {
          //
          // Round down
          //

          roundingMode = ROUND_DOWN;
          i += 1;
      }
      else if (!strcmp (argv[i], "-u"))
      {
          //
          // Round down
          //

          roundingMode = ROUND_UP;
          i += 1;
      }
      else if (!strcmp (argv[i], "-z"))
      {
          //
          // Set compression method
          //

          if (i > argc - 2)
            usageMessage (argv[0]);

          compression = getCompression (argv[i + 1]);
          i += 2;
      }
      else if (!strcmp (argv[i], "-v"))
      {
          //
          // Verbose mode
          //

          verbose = true;
          i += 1;
      }
      else if (!strcmp (argv[i], "-h"))
      {
          //
          // Print help message
          //

          usageMessage (argv[0], true);
      }
      else
      {
          //
          // Image file name
          //

          if (inFile == 0)
            inFile = argv[i];
          else
            outFile = argv[i];

          i += 1;
      }
    }

    if (inFile == 0 || outFile == 0)
      usageMessage (argv[0]);

    //
    // Load inFile, convert it, and save the result in outFile.
    //

    int exitStatus = 0;

    try
    {
      if (type == ENVMAP_CUBE)
      {
          makeCubeMap (inFile, outFile,
                   tileWidth, tileHeight,
                   levelMode, roundingMode,
                   compression, mapWidth,
                   padTop, padBottom,
                   filterRadius, numSamples,
                   verbose);
      }
      else
      {
          makeLatLongMap (inFile, outFile,
                      tileWidth, tileHeight,
                      levelMode, roundingMode,
                      compression, mapWidth,
                      padTop, padBottom,
                      filterRadius, numSamples,
                      verbose);
      }
    }
    catch (const exception &e)
    {
      cerr << e.what() << endl;
      exitStatus = 1;
    }

    return exitStatus;
}

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