Orange branch: OpenEXR finally in Blender!

Credits go to Gernot Ziegler, who originally coded EXR support, and to
Austin  Benesh for bringing it further. Kent Mein provided a lot of code
for integrating float buffers in Blender imbuf and ImBuf API cleanup,
and provided Make and Scons and static linking.

At this moment; the EXR libraries are a *dependency*, so you cannot get
the Orange branch compiled without having OpenEXR installed. Get the
(precompiled or sources) stuff from www.openexr.com. Current default is
that the headers and lib resides in /user/local/

Several changes/additions/fixes were added:

- EXR code only supported 'half' format (16 bits per channel). I've added
  float writing, but for reading it I need tomorrow. :)
- Quite some clumsy copying of data happened in EXR code.
- cleaned up the api calls already a bit, preparing for more advanced
  support
- Zbuffers were saved 16 bits, now 32 bits
- automatic adding of .exr extensions went wrong

Imbuf:

- added proper imbuf->flags and imbuf->mall support for float buffers, it
  was created for *each* imbuf. :)
- found bugs for float buffers in scaling and flipping. Code there will
  need more checks still
- imbuf also needs to be verified to behave properly when no 32 bits
  rect exists (for saving for example)

TODO:

- support internal float images for textures, backbuf, AO probes, and
  display in Image window

Hope this commit won't screwup syncing with bf-blender... :/

1 files changed, 22 insertions, 0 deletions

diff --git a/source/blender/imbuf/intern/openexr/SConscript b/source/blender/imbuf/intern/openexr/SConscript
new file mode 100644
index 00000000000..ee834669b04
--- /dev/null
+++ b/source/blender/imbuf/intern/openexr/SConscript
@@ -0,0 +1,22 @@
+#!/usr/bin/python
+Import ('extra_includes')
+Import ('user_options_dict')
+Import ('library_env')
+
+openexr_env = library_env.Copy ()
+
+source_files = ['openexr_api.cpp'
+                ]
+
+include_paths = ['.',
+		'../blenkernel',
+		'../imbuf',
+		'../imbuf/intern',
+		'../blenlib',
+		'../makesdna']
+                 
+openexr_env.Append(CPPPATH = extra_includes)
+openexr_env.Append(CPPPATH = include_paths)
+openexr_env.Prepend (CPPPATH = user_options_dict['OPENEXR_INCLUDE'])
+#ftf_env.Append(CPPDEFINES = 'FTGL_STATIC_LIBRARY')
+openexr_env.Library (target='#'+user_options_dict['BUILD_DIR']+'/lib/blender_openexr', source=source_files)