Index: trunk/Ohana/src/libfits/doc/notes-compress.txt
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--- trunk/Ohana/src/libfits/doc/notes-compress.txt	(revision 15240)
+++ trunk/Ohana/src/libfits/doc/notes-compress.txt	(revision 15240)
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+
+I need to implement (at least) support for read of compressed images.
+It might be a good plan to upgrade the gfits API set, or at least
+identify needed work.
+
+* PCOUNT / GCOUNT : these are currently ignored.  I need to at least
+  include them in the calculation of the fits data segment size.  I
+  might need to use them in the interpretation of the table data.
+
+* implement variable-length columns in FITS table support.  
+
+* add the I/O support directly to gfits_read/write_matrix, or define
+  low-level APIs to support read/write of a compressed image?
+
+  * we should start with the low-level APIs and add in the higher
+    level ones as needed.
+
+* possible needed APIs:
+
+  - gfits_image_is_compressed (Header *header) 
+    does the specified header correspond to a compressed image?	
+    what about the PHU which implies a compressed image in the next
+    HDU?
+
+  - Matrix *gfits_uncompress_image (Header *header, Table *table)
+    convert the specified table into an image, modifying the header in
+    place
+
+  - Table *gfits_compress_image (Header *header, Matrix *matrix, Compression *options)
+    compress the given image returning the table data
+
+