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1 dashley 37 <?php
2     //--------------------------------------------------------------------------------
3     //thumbnails_make.php, v0.1a, Copyright David T. Ashley, 2015
4     //--------------------------------------------------------------------------------
5     //This program, a PHP script, creates thumbnail images for recognized
6     //image files in the current working directory. This program is part of a
7     //3-program suite designed to collectively create a web page directly from
8     //digital camera files (and of course the web page can be customized by
9     //hand-editing after it is automatically generated). The supported process for
10     //creating a web page involves 3 programs (rather than 1) primarily to circumvent
11     //the involuntary process termination that will occur in some shared environments
12     //if a process consumes too much CPU time.
13     //
14     //The 3 programs in the 3-program suite are:
15     //
16     // filenames_canonize.php:
17     // Converts all names of files in a directory to lower-case, and makes
18     // substitutions for any unusual characters.
19     //
20     // thumbnails_make.php (this program):
21     // Creates thumbnails from recognized image types. The thumbnails are
22     // named relative to the original image file with the suffix "_small".
23     // Only 20 files are converted on each invocation of the program, to
24     // avoid the involuntary process termination that typically occurs in
25     // a shared hosting environment when a process uses too much CPU time.
26     // The program should be run repeatedly until it indicates that it has
27     // no more thumbnails to create.
28     //
29     // If any full-sized photos are modified, any corresponding thumbnails
30     // should be deleted and thumbnails_make.php and indexfile_make.php should
31     // be run again.
32     //
33     // indexfile_make.php
34     // Scans a directory and makes an index file ("index2.php") displaying
35     // all the thumbnail images, each of which link to the corresponding
36     // full-sized image. The index file is tailored to Dave Ashley's
37     // needs, but the created file can be edited and most of the content
38     // pasted into an HTML file. To avoid the accidental loss of
39     // information, any existing "index2.php" file is renamed out of the
40     // way.
41     //
42     //This script is designed to be run manually (rather than automatically invoked
43     //as a result of a web page request). It was written in PHP for convenience
44     //simply because DreamHost (the web hosting company Dave Ashley uses) has as part
45     //of its hosting environment PHP with the ImageMagick library compiled in.
46     //
47     //Usually, this script is invoked using "php <path>/thumbnails_make.php", but the
48     //method of invocation may vary based on computing platform details.
49     //--------------------------------------------------------------------------------
50     //This program is free software: you can redistribute it and/or modify
51     //it under the terms of the GNU General Public License as published by
52     //the Free Software Foundation, either version 3 of the License, or
53     //(at your option) any later version.
54     //
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57     //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
58     //GNU General Public License for more details.
59     //
60     //The GNU General Public License is reproduced below, and also is
61     //available at http://www.gnu.org/licenses/.
62     //--------------------------------------------------------------------------------
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525     // You may not impose any further restrictions on the exercise of the
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532     //
533     // 11. Patents.
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535     // A "contributor" is a copyright holder who authorizes use under this
536     // License of the Program or a work on which the Program is based. The
537     // work thus licensed is called the contributor's "contributor version".
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589     // to the third party based on the extent of your activity of conveying
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594     // for and in connection with specific products or compilations that
595     // contain the covered work, unless you entered into that arrangement,
596     // or that patent license was granted, prior to 28 March 2007.
597     //
598     // Nothing in this License shall be construed as excluding or limiting
599     // any implied license or other defenses to infringement that may
600     // otherwise be available to you under applicable patent law.
601     //
602     // 12. No Surrender of Others' Freedom.
603     //
604     // If conditions are imposed on you (whether by court order, agreement or
605     // otherwise) that contradict the conditions of this License, they do not
606     // excuse you from the conditions of this License. If you cannot convey a
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609     // not convey it at all. For example, if you agree to terms that obligate you
610     // to collect a royalty for further conveying from those to whom you convey
611     // the Program, the only way you could satisfy both those terms and this
612     // License would be to refrain entirely from conveying the Program.
613     //
614     // 13. Use with the GNU Affero General Public License.
615     //
616     // Notwithstanding any other provision of this License, you have
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623     // combination as such.
624     //
625     // 14. Revised Versions of this License.
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627     // The Free Software Foundation may publish revised and/or new versions of
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650     //
651     // 15. Disclaimer of Warranty.
652     //
653     // THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
654     // APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
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657     // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
658     // PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
659     // IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
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661     //
662     // 16. Limitation of Liability.
663     //
664     // IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
665     // WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
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669     // DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
670     // PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
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672     // SUCH DAMAGES.
673     //
674     // 17. Interpretation of Sections 15 and 16.
675     //
676     // If the disclaimer of warranty and limitation of liability provided
677     // above cannot be given local legal effect according to their terms,
678     // reviewing courts shall apply local law that most closely approximates
679     // an absolute waiver of all civil liability in connection with the
680     // Program, unless a warranty or assumption of liability accompanies a
681     // copy of the Program in return for a fee.
682     //--------------------------------------------------------------------------------
683     //C O N F I G U R A T I O N
684     //--------------------------------------------------------------------------------
685     //Configuration switch combinations were not tested. E-mail me any program
686     //corrections (dashley@gmail.com).
687     define ("CFG_PROGNAME", "thumbnails_make.php");
688     //Number of characters per line preferred for console output.
689     define ("CFG_CONSOLE_STD_LINE_LEN", 78);
690     //Number of characters per line preferred for console output.
691     define ("CFG_THUMBNAIL_DIMENSION_MAX", 125);
692     //The maximum dimension of the created thumbnails. Thumbnails are sized so
693     //that the longest dimension is this many pixels.
694     define ("CFG_THUMBNAIL_BEVELED_BORDER_WIDTH", 4);
695     //The number of pixels that the thumbnail beveled borders should be.
696     define ("CFG_THUMBNAIL_FILENAME_SUFFIX", "_small");
697     //String added just before the filename extension to choose thumbnail names
698     //based on name of full-sized image.
699     define ("CFG_LANCZOS_FILTER_APPLY", FALSE);
700     //TRUE if should apply the Lanczos filter when making the thumbnail, FALSE
701     //otherwise. I have no idea if using a Lanczos filter improves the quality
702     //of the thumbnails, but the filter was applied in the PHP example I found
703     //online. Applying the Lanczos filter typically adds a few seconds to the
704     //time required to create each thumbnail.
705     define ("CFG_MAX_THUMBNAILS_PER_INVOCATION", 20);
706     //The maximum number of thumbnails that should be created per invocation.
707     //This is to prevent the program from being involuntarily terminated
708     //for taking too much CPU time.
709     //--------------------------------------------------------------------------------
710     //Calculates important integer indices related to creating a thumbnail, in order
711     //to minimize distortion in the thumbnail.
712     //
713     //When creating a thumbnail, the longer side may be relatively short (perhaps
714     //100 pixels), and the shorter side may be even shorter (perhaps even as short
715     //as 10 pixels). If the dimensions of the original image were not changed,
716     //converting the image to a thumbnail may result in distortion of up to about
717     //one percent. As an example, suppose that a 1600 x 900 image is converted to a
718     //thumbnail with the longer side of 125 pixels. The ideal dimension for the
719     //shorter side would be (900/1600) * 125 = 70.3125 pixels. The aspect ratio of
720     //the thumbnail can't be made to match the aspect ratio of the original image.
721     //
722     //To avoid any aspect ratio distortion that might be noticeable, this program
723     //chooses the shorter dimension for the thumbnail that is the ceiling of the actual
724     //quotient, then crops the longer dimension of the original image before the
725     //conversion to try and match the aspect ratios as closely as possible.
726     //
727     //In the example a paragraph or two above, the shorter side of the thumbnail
728     //would be chosen to be 71 pixels.
729     //
730     //Once this choice is made, we want to trim the original image before conversion
731     //so that n/900 is as close as possible to 125/71. n = (900 * 125) / 71 =
732     //1584.5070 pixels, so we choose 1585. This keeps the aspect ratio of the
733     //original image and the thumbnail as close as possible.
734     //
735     //Although the longer side of the original image may be reduced prior to the
736     //conversion to a thumbnail, this information is not written to disk, and
737     //the original image is not modified. The adjustment of the longer side is
738     //just a conversion trick to hopefully get better thumbnails.
739     function calc_thumbnail_conversion_pars
740     (
741     $in_orig_longer,
742     //Longer dimension of original image.
743     $in_orig_shorter,
744     //Shorter dimension of original image.
745     $in_thumbnail_longer,
746     //Longer dimension of desired thumbnail.
747     & $out_thumbnail_longer,
748     //Longer dimension of thumbnail that should be created.
749     & $out_thumbnail_shorter,
750     //Shorter dimension of thumbnail that should be created.
751     & $out_orig_crop_dim_longer,
752     //The size to crop to on the longer axis of the original.
753     & $out_orig_crop_dim_shorter,
754     //The size to crop to on the shorter axis of the original.
755     & $out_orig_crop_start_longer,
756     //For use with the Imagick:cropImage() method, the start
757     //position of the crop on the longer axis.
758     & $out_orig_crop_start_shorter
759     //For use with the Imagick:cropImage() method, the start
760     //position of the crop on the shorter axis.
761     )
762     {
763     //Set the thumbnail shorter dimension to the floor. This means would need to trim
764     //longest dimension of original to match aspect ratio as closely as possible.
765     $out_thumbnail_longer = $in_thumbnail_longer;
766     $out_thumbnail_shorter = ceil(((float)$in_thumbnail_longer *
767     (float)$in_orig_shorter) / (float)$in_orig_longer);
768     settype($out_thumbnail_shorter, "integer");
769    
770     //The aspect ratio of the thumbnail is now set. Try to match the aspect ratio of the larger
771     //image as closely as possible by selecting a smaller number for the long axis of the
772     //original image.
773     $out_orig_crop_dim_longer = round(((float)$in_thumbnail_longer *
774     (float)$in_orig_shorter) / (float)$out_thumbnail_shorter);
775     settype($out_orig_crop_dim_longer, "integer");
776    
777     //The original keeps its shorter dimension unchanged.
778     $out_orig_crop_dim_shorter = $in_orig_shorter;
779    
780     //Set the cropping of the longer side of the original to cover half the necessary
781     //reduction.
782     $out_orig_crop_start_longer = round(((float)$in_orig_longer -
783     (float)$out_orig_crop_dim_longer) / 2.0);
784     settype($out_orig_crop_start_longer, "integer");
785    
786     //No cropping of original shorter side.
787     $out_orig_crop_start_shorter = 0;
788     }
789     //--------------------------------------------------------------------------------
790     //Repeats a character to the console output a certain number of times.
791     function rep_char_con($c, $n)
792     {
793     while ($n--)
794     echo $c;
795     }
796     //--------------------------------------------------------------------------------
797     //Writes a standard thick horizontal line to the console.
798     function hor_line_thick()
799     {
800     rep_char_con("=", CFG_CONSOLE_STD_LINE_LEN);
801     echo "\n";
802     }
803     //--------------------------------------------------------------------------------
804     //Writes a standard thin horizontal line to the console.
805     function hor_line_thin()
806     {
807     rep_char_con("-", CFG_CONSOLE_STD_LINE_LEN);
808     echo "\n";
809     }
810     //--------------------------------------------------------------------------------
811     //Returns an array of all files in the working directory.
812     //If no files can be found, returns FALSE.
813     function get_file_names_in_dir()
814     {
815     //Get directory list.
816     $rv = scandir (".");
817    
818     //If the list is empty, something went wrong. Return FALSE.
819     if ($rv === FALSE)
820     return FALSE;
821    
822     return $rv;
823     }
824     //--------------------------------------------------------------------------------
825     //Returns TRUE if a file name appears to be a valid full-sized image name,
826     //or FALSE otherwise.
827     function is_full_sized_image_file_name($in_filename)
828     {
829     //Convert the string name to all lower case. This will do for
830     //comparisons and tests.
831     $s = strtolower($s);
832    
833     //Attempt to split the name into a base and an extension. Any failure
834     //means it is an unsuitable name.
835     $extension_start = strrpos($in_filename, ".");
836     //Find position of last "." in string. This should precede the
837     //file extension.
838    
839     if ($extension_start === FALSE)
840     {
841     //Bad name. Unsuitable.
842     return FALSE;
843     }
844    
845     //Calculate the base and extension.
846     $filename_base = substr($in_filename, 0, $extension_start);
847     $filename_extension = substr($in_filename, $extension_start + 1);
848    
849     //If the extension is neither "jpg" nor "jpeg", it is unsuitable.
850     if (($filename_extension != "jpg") && ($filename_extension != "jpeg"))
851     return FALSE;
852    
853     //If the filename base is empty, the filename is unsuitable.
854     if (strlen($filename_base) == 0)
855     return FALSE;
856    
857     //If the last characters of the base are the CFG_THUMBNAIL_FILENAME_SUFFIX,
858     //the name is unsuitable.
859     if (strlen($filename_base) >= strlen(CFG_THUMBNAIL_FILENAME_SUFFIX))
860     {
861     if (substr($filename_base, strlen($filename_base) - strlen(CFG_THUMBNAIL_FILENAME_SUFFIX))
862     == CFG_THUMBNAIL_FILENAME_SUFFIX)
863     return FALSE;
864     }
865    
866     //Looks good.
867     return TRUE;
868     }
869     //--------------------------------------------------------------------------------
870     //As a function of the file name, creates the file name for the thumbnail.
871     function file_name_to_thumbnail_name($in_filename)
872     {
873     $extension_start = strrpos($in_filename, ".");
874     //Find position of last "." in string. This should precede the
875     //file extension.
876     if ($extension_start === FALSE)
877     {
878     //"." not found. Should not happen. Filenames were checked in advance.
879     echo "Fatal internal error at line " . __LINE__ . "\n";
880     exit(1);
881     }
882    
883     $filename_prefix = substr($in_filename, 0, $extension_start);
884     $filename_extension = substr($in_filename, $extension_start);
885    
886     $rv = $filename_prefix . CFG_THUMBNAIL_FILENAME_SUFFIX . $filename_extension;
887    
888     return $rv;
889     }
890     //--------------------------------------------------------------------------------
891     //Actually creates the thumbnail, and returns some information about what was
892     //done.
893     //
894     //The calls to the ImagMagick library take on the order of 5s per image if there
895     //is filtering.
896     function create_thumbnail( $in_filename,
897     $in_thumbnailname,
898     & $out_filename_filesize,
899     & $out_filename_xdim,
900     & $out_filename_ydim,
901     & $out_thumbnailname_filesize,
902     & $out_thumbnailname_xdim,
903     & $out_thumbnailname_ydim)
904     {
905     //Assign output parameters just in case something doesn't get assigned.
906     $out_filename_filesize = 0;
907     $out_filename_xdim = 0;
908     $out_filename_ydim = 0;
909     $out_thumbnailname_filesize = 0;
910     $out_thumbnailname_xdim = 0;
911     $out_thumbnailname_ydim = 0;
912    
913     //Establish target dimensions. Two cases, depending on which is the longer
914     //side.
915    
916     //Construct.
917     $imagick = new Imagick();
918    
919     //Load image.
920     $imagick->readImage($in_filename);
921    
922     //Get the dimensions of the image we just loaded.
923     $geo = $imagick->getImageGeometry();
924     $out_filename_xdim = $geo['width'];
925     $out_filename_ydim = $geo['height'];
926    
927     //Calculate target sizes. We rearrange parameters based on which is our
928     //longest side.
929     if ($out_filename_xdim >= $out_filename_ydim)
930     {
931     //Longer width (x-dimension), or square.
932     calc_thumbnail_conversion_pars
933     (
934     $out_filename_xdim,
935     $out_filename_ydim,
936     CFG_THUMBNAIL_DIMENSION_MAX,
937     $out_thumbnailname_xdim,
938     $out_thumbnailname_ydim,
939     $orig_crop_dim_x,
940     $orig_crop_dim_y,
941     $orig_crop_start_x,
942     $orig_crop_start_y
943     );
944     }
945     else
946     {
947     //Longer height (y-dimension).
948     calc_thumbnail_conversion_pars
949     (
950     $out_filename_ydim,
951     $out_filename_xdim,
952     CFG_THUMBNAIL_DIMENSION_MAX,
953     $out_thumbnailname_ydim,
954     $out_thumbnailname_xdim,
955     $orig_crop_dim_y,
956     $orig_crop_dim_x,
957     $orig_crop_start_y,
958     $orig_crop_start_x
959     );
960     }
961    
962     //For debugging only, might want to know intermediate calculation results.
963     //echo "xcropdim, ycropdim, xcropstart, ycropstart: "
964     // .
965     // $orig_crop_dim_x
966     // .
967     // " "
968     // .
969     // $orig_crop_dim_y
970     // .
971     // " "
972     // .
973     // $orig_crop_start_x
974     // .
975     // " "
976     // .
977     // $orig_crop_start_y
978     // .
979     // "\n";
980    
981     //Crop the original to try to preserve the aspect ratio of the thumbnail
982     //as precisely as possible.
983     $imagick->cropImage(
984     $orig_crop_dim_x,
985     $orig_crop_dim_y,
986     $orig_crop_start_x,
987     $orig_crop_start_y
988     );
989    
990     //For debugging only, might want to get a look at the cropped image, to
991     //be sure nothing unexpected happens on the canvas.
992     //$imagick->writeImage($in_filename . ".cropped.jpg");
993    
994     //Resize to thumbnail size.
995     if (CFG_LANCZOS_FILTER_APPLY)
996     {
997     $imagick->resizeImage($out_thumbnailname_xdim,
998     $out_thumbnailname_ydim,
999     Imagick::FILTER_LANCZOS,
1000     1);
1001     }
1002     else
1003     {
1004     $imagick->resizeImage($out_thumbnailname_xdim,
1005     $out_thumbnailname_ydim,
1006     0,
1007     1);
1008     }
1009    
1010     //Create the border.
1011     $imagick->raiseImage(CFG_THUMBNAIL_BEVELED_BORDER_WIDTH,
1012     CFG_THUMBNAIL_BEVELED_BORDER_WIDTH,
1013     0,
1014     0,
1015     1);
1016    
1017     //Set compression to get a smaller thumbnail written, and strip
1018     //header information. stripImage() seems to have the largest effect
1019     //on thumbnail file size, so leaving the thumbnail quality near 100%
1020     //is feasible. The jump in file size between 90% and 95% seemed to be
1021     //fairly large (40% to 50%), so I left it at 90%. My rationale is
1022     //that with the proliferation of mobile devices and cellular data,
1023     //getting the thumbnail as small as possible is more important than
1024     //the thumbnail looking perfect. If the viewer wants a perfect image,
1025     //they can view the full-sized image.
1026     $imagick->setImageCompression(Imagick::COMPRESSION_JPEG);
1027     $imagick->setImageCompressionQuality(90);
1028     $imagick->stripImage();
1029    
1030     //Write the thumbnail.
1031     $imagick->writeImage($in_thumbnailname);
1032    
1033     //Destroy to prevent memory leak.
1034     $imagick->clear();
1035     $imagick->destroy();
1036    
1037     //All of the writing is done. Try to obtain the file sizes.
1038     $fsize = filesize($in_filename);
1039     if ($fsize !== FALSE)
1040     $out_filename_filesize = $fsize;
1041     $fsize = filesize($in_thumbnailname);
1042     if ($fsize !== FALSE)
1043     $out_thumbnailname_filesize = $fsize;
1044     }
1045     //--------------------------------------------------------------------------------
1046     //Write introductory message.
1047     hor_line_thick();
1048     echo CFG_PROGNAME . " Copyright (C) 2015 David T. Ashley\n";
1049     echo "This program comes with ABSOLUTELY NO WARRANTY; and is licensed under\n";
1050     echo "the GNU General Public License, Version 3. A copy of this license is\n";
1051     echo "provided in the source code of this program.\n";
1052     hor_line_thin();
1053     //-----------------------------------------------------------------------------
1054     //Get and emit the names of everything in the directory.
1055     $file_list = get_file_names_in_dir();
1056     if ($file_list === FALSE)
1057     {
1058     echo "List of files from PHP function scandir() is empty.\n";
1059     echo "Serious internal error, or nothing to do. Script cannot continue.\n";
1060     hor_line_thick();
1061     exit(1);
1062     }
1063     else
1064     {
1065     echo "Files in working directory (unsorted, unfiltered, "
1066     .
1067     count($file_list)
1068     .
1069     " files):\n";
1070     for ($i = 0; $i < count($file_list); $i++)
1071     echo " " . sprintf("[%5d]", $i) . " " . $file_list[$i] . "\n";
1072     }
1073     hor_line_thin();
1074     //-----------------------------------------------------------------------------
1075     //Remove the standard directory entries "." and ".." from the list, and
1076     //remove any directories.
1077     $temp_list = $file_list;
1078     unset($file_list);
1079     $n = 0;
1080     for ($i = 0; $i < count($temp_list); $i++)
1081     {
1082     //echo "Checking " . $temp_list[$i] . "\n";
1083    
1084     if (strcmp($temp_list[$i], ".") == 0)
1085     {
1086     //. entry, not a file.
1087     }
1088     else if (strcmp($temp_list[$i], "..") == 0)
1089     {
1090     //.. entry, not a file.
1091     }
1092     else if (is_file($temp_list[$i]))
1093     {
1094     //This is a regular file.
1095     $file_list[] = $temp_list[$i];
1096     $n++;
1097     }
1098     }
1099    
1100     if ($n == 0)
1101     $file_list = FALSE;
1102    
1103     unset($n);
1104     unset($temp_list);
1105     //-----------------------------------------------------------------------------
1106     //If there is nothing to do, end the script.
1107     if ($file_list === FALSE)
1108     {
1109     echo "No files to process.\n";
1110     hor_line_thick();
1111     exit(0);
1112     }
1113     //-----------------------------------------------------------------------------
1114     //Sort the list. This is a non-event. The only rationale for sorting is that
1115     //it ensures that the same set of files will be processed in the same order,
1116     //regardless of the order provided by the underlying OS internals.
1117     sort($file_list);
1118     //-----------------------------------------------------------------------------
1119     //Emit the names we now have.
1120     echo "Files in working directory (directory entries removed, sorted, "
1121     .
1122     count($file_list)
1123     .
1124     " files):\n";
1125     for ($i = 0; $i < count($file_list); $i++)
1126     echo " " . sprintf("[%5d]", $i) . " " . $file_list[$i] . "\n";
1127     hor_line_thin();
1128    
1129     //-----------------------------------------------------------------------------
1130     //For each file that is appropriate and where the thumbnail does not already
1131     //exist, up to the maximum we may do in one invocation, create the thumbnail.
1132     $i = 0;
1133     $completed = 0;
1134     while (($completed < CFG_MAX_THUMBNAILS_PER_INVOCATION) && ($i < count($file_list)))
1135     {
1136     if (is_full_sized_image_file_name($file_list[$i]))
1137     {
1138     $thumbnail_name = file_name_to_thumbnail_name($file_list[$i]);
1139    
1140     if (file_exists($thumbnail_name))
1141     {
1142     echo " " . sprintf("[%5d]", $i) . " " . $file_list[$i] . " : skipping because corresponding thumbnail exists.\n";
1143     hor_line_thin();
1144     }
1145     else
1146     {
1147     echo " " . sprintf("[%5d]", $i) . " " . $file_list[$i] . " : creating thumbnail.\n";
1148    
1149     echo "Creating thumbnail \"" .
1150     $thumbnail_name .
1151     "\" from image \"" .
1152     $file_list[$i] .
1153     "\".\n";
1154    
1155     create_thumbnail($file_list[$i],
1156     $thumbnail_name,
1157     $filename_filesize,
1158     $filename_xdim,
1159     $filename_ydim,
1160     $thumbnail_filesize,
1161     $thumbnail_xdim,
1162     $thumbnail_ydim);
1163    
1164     echo "Conversion complete.\n";
1165     echo " Full-sized image file size/xdim/ydim = " .
1166     $filename_filesize . "/" . $filename_xdim . "/" . $filename_ydim .
1167     ",\n";
1168     echo " Thumbnail image filesize/xdim/ydim = " .
1169     $thumbnail_filesize . "/" . $thumbnail_xdim . "/" . $thumbnail_ydim .
1170     ",\n";
1171    
1172     hor_line_thin();
1173     $completed++;
1174     }
1175     }
1176     else
1177     {
1178     //Unsuitable base name. Can't use it.
1179     echo " " . sprintf("[%5d]", $i) . " " . $file_list[$i] . " : skipping due to unsuitable name.\n";
1180     hor_line_thin();
1181     }
1182    
1183     $i++;
1184     }
1185    
1186     //Emit a message about whether the program should be run again. I am aware of
1187     //the uncovered case--where the last thumbnail was made on the last iteration
1188     //of this invocation--but I will leave it uncovered for now. All that happens
1189     //is the user runs the program unnecessarily one more time.
1190     if ($completed == 0)
1191     {
1192     echo "No thumbnails were created--this program is done creating thumbnails.\n";
1193     echo "It is not necessary to run this program again.\n";
1194     hor_line_thin();
1195     }
1196     else
1197     {
1198     echo $completed . " thumbnail(s) were created. Please run this program repeatedly again\n";
1199     echo "until no more thumbnails are created.\n";
1200     hor_line_thin();
1201     }
1202    
1203     echo CFG_PROGNAME . " execution ends.\n";
1204     hor_line_thick();
1205     //--------------------------------------------------------------------------------
1206     //End of File
1207     //--------------------------------------------------------------------------------
1208     ?>

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dashley@gmail.com
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