Added casts for pointer assignments in pnm.c. Removed old stale code from

[imager.git] / TODO

                         *** TODO ***
                        


Iolayer:
- Add scalar/mmap to iolayer
- Add close() code to iolayer
- Merge callback interface into iolayer
- Add interface for writing to all formats but tiff
- Add interface for reading for png (started), 
  gif (merge with cb patch), ppm and raw
- Add new tests once all formats support io_layer
- Implment the maxread threshold (Indicates how far 
  a library can read before it indicates that it's done).

Enhanched internal structure:

MultiImage & metadata support:
- Figure what interface should be between C and perl?
- How to store data in the C interface for tags/metadata?
  Support tiff's madness, i.e. tags and options.
- Error handling, make a general i_errstr object and arrange
  such that each image has an i_errstr object to hold its
  local errors?
- SEE design/represent.txt for proposed new structure and
  interface design that takes these factors into account.
- define common i_* tags for specifying attribute common among images
  like spatial resolution (implement for other image types, especially 
  TIFF)

New Features:
- Add mng support.

- Transforms, interpolated multidimensional lookup tables.
  Usefull for CMYK <-> RGB table lookup.

- Finish antialiased filled polygon function.

- advanced font layout (spacing, kerning, alignment) (sky)

- ways to check if characters are present in a font, eg. checking if
  ligatures are present

- font synthesis - synthesize a bold or slanted font from a normal font
  (or even from an existing bold or slanted font)

- utf8 support for text output
  (available for freetype2)

- image rotation, 3 ways of doing rotation:
  - rotation by shearing, which produces makes lengths in the image larger,
    but could be useful
  (2 of the 3 have been done)

- read_multi() needs to handle other multi-image types, such as TIFF 
  (probably the most common)

- compose channels - build a new image based on channels from several
  images

- filled polygons

- arc outlines

Clean up:
- Make sure everything is doable with the OO interface
  i_flood_fill() for example.

- Compile with memory debugging enabled and fix all leaks

- dynaload.c is strongly tied to perl

- Add mycalloc() and myrealloc() to the malloc() wrappers.

- should we overload <=> or cmp for Imager::Color objects?
  too many worms, leave it out

- should the interlace option for reading raw images have 
  symbolic names in the OO interface?

- improve consistency in the interfaces, both in trying to use named
  parameters where possible but also in using consistent names, eg.
  (tx, ty) vs (left, top) in rubthrough() vs paste().  Do we want a (simple)
  standard for this (suggested names)?  Remember to preserve the old 
  interface where possible.

Format specific issues:
- provide patches for libgif and libungif that fix their bugs
  and give a useful extension interface.  Probe for the 
  installation of the patches in Makefile.PL to let gif.c
  know what features it can use.

- Add options for pnm, writer to save in any of the p1..P6
  formats.  Even if the input has 1 channel, write 3 and such
  cases.  Also allow ascii mode.  Need to be able to write 
  pbm images which needs ties to the quantization code.

- pcx and targa image formats

- aalib support

- save other formats as paletted for paletted where that's supported

- read other format paletted images as paletted images

- have jpeg.c write 2 or 4 channel images as 1 or 3 channels respectively


Documentation:
- Add to the documentation
- Write a tutorial?
- sample code and Imager/Samples.pod describing them
- Imager/Cookbook.pod
- modify the .pm files to put pod describing a function close to the 
  function
- Write a guide to installing the helper libraries
- Go through the entire project and add comments in pod
  so doco.perl can be used to read them.