=== BigView ===

This is source for a suite of programs to view very large images.

1) Images must first be in PPM format
2) generate a .PAGED format image running genPaged on a .PPM
3) view a .PAGED file with showPaged

---------
Building
---------
$> perl ./makeLinks.pl
$> make -j

makeLinks.pl ensures all libs/apps are built with the same flags.
Put locally-required build changes in the top-level Global.defs.

---------
Examples
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$> djpeg -grayscale 05-ra-03-humphrey-A061R1.jpg > 05-ra-03-humphrey-A061R1.ppm
i---or---
$> jpegtopnm 05-ra-03-humphrey-A061R1.jpg > 05-ra-03-humphrey-A061R1.pp

$> genPaged 05-ra-03-humphrey-A061R1.ppm
==== 05-ra-03-humphrey-A061R1.ppm =====
Format: Binary PGM
Max Pixel Value = 255
          Width = 956
         Height = 962
     Components = 1[1=grey,3=rgb]
      Bit Depth = 8 bits
     Pixel Size = 1 bytes
         Offset = 15 bytes
P5
# Paged format with mipmaps: 256x256x1 = 65536 bytes per page
# Level 0 : [956,962] => [4,4] = 16 pages starting at page  0 @     444 bytes
# Level 1 : [478,481] => [2,2] =  4 pages starting at page 16 @ 1049020 bytes
# Level 2 : [239,240] => [1,1] =  1 pages starting at page 20 @ 1311164 bytes
# ========================================
# Total pages = 21
# Total bytes = header + pages
#             = 444 + 1376256 = 1376700
956 962 255

Levels = 3

$> showPaged 05-ra-03-humphrey-A061R1.ppm.paged
===== 05-ra-03-humphrey-A061R1.ppm.paged =====
Format: Binary PGM
Comment: Paged format with mipmaps: 256x256x1 = 65536 bytes per page:
Comment: Level 0 : [956,962] => [4,4] = 16 pages starting at page  0 @     444 bytes:
Comment: Level 1 : [478,481] => [2,2] =  4 pages starting at page 16 @ 1049020 bytes:
Comment: Level 2 : [239,240] => [1,1] =  1 pages starting at page 20 @ 1311164 bytes:
Comment: ========================================:
Comment: Total pages = 21:
Comment: Total bytes = header + pages:
Comment:             = 444 + 1376256 = 1376700:
Max Pixel Value = 255
          Width = 956
         Height = 962
     Components = 1[1=grey,3=rgb]
      Bit Depth = 8 bits
     Pixel Size = 1 bytes
         Offset = 444 bytes
# Level 0 : [956,962] => [4,4] = 16 pages
# Level 1 : [478,481] => [2,2] = 4 pages
# Level 2 : [239,240] => [1,1] = 1 pages
maxTexPages = 86
Max LOD = 0