#393 teqser encounters errors on large image

[Anonymous]

When using the 21600 x 10800 JPEG image found here: http://visibleearth.nasa.gov/view_detail.php?id=8391 (after being converted to a .tif using irfanview, smaller images using the same conversion settings worked fine) teqser throws up the following error:

• Coping Image bigvers.tif...
  -- Optimizing Image bigvers.tif...
  Texture bigvers.tif ----> bigvers.tx
  "swrap"= periodic
  "twrap"= periodic
  "filter"= box
  "swidth"= 1.0
  "twidth"= 1.0
  "compression" = none
  WARNING: Cannot handle desired tiff format efficiently: "Unknown photometric typ
  e".
  WARNING: Switching to generic RGBA handling - this may result in some loss of pr
  ecision
  ERROR: std::exception encountered in RiMakeTextureV: bad allocation

[Paul Gregory]

Appears to work fine on MacOSX and Linux machines, must be a Windows issue.

[Chris Foster]

This is very likely because aqsis_tex isn't memory efficient when downsampling: it simply reads the entire image into memory before doing any operations. Fixing this problem is probably a task for after the OIIO texture library integration. (OIIO may even have memory efficient downsampling already in which case we won't need to do anything!)