test/imbuf at 4e6d43a2cb2caac745b99a66e881210bcb7f299d - test

Files

Ton Roosendaal ecdfa5374a Work in progress commit on saving OpenEXR with all render-layers and

passes in single file. Code is currently disabled, commit is mainly to
have a nicer method of excluding OpenEXR dependency from render module.
This should compile with disabled WITH_OPENEXR too.

Reason why EXR is great to include by default in Blender is its feature
to store unlimited layers and channels, and write this tile based. I
need the feature for saving memory; while rendering tiles, all full-size
buffers for all layers and passes are kept in memory now, which can go
into 100s of MB easily.
The code I commit now doesn't allocate these buffers while rendering, but
saves the tiles to disk. In the end is it read back. Overhead for large
renders (like 300 meg buffers) is 10-15 seconds, not bad.

Two more interesting aspects:
- Blender can save such multi-layer files in the temp directory, storing
it with .blend file name and scene name. That way, on each restart of Blender,
or on switching scenes, these buffers can be read. So you always see what was
rendered last. Also great for compositing work.
- This can also become an output image type for rendering. There's plenty of
cases where you want specific layers or passes saved to disk for later use.

Anyhoo, finishing it is another days of work, and I got more urgent stuff
now!

2006-02-23 20:57:31 +00:00

intern

Work in progress commit on saving OpenEXR with all render-layers and

2006-02-23 20:57:31 +00:00

IMB_imbuf_types.h

- Restored "dither" option for conversion from float -> byte images.

2006-02-18 14:35:43 +00:00

IMB_imbuf.h

Added ability to render Zbuffer to an image.

2006-02-10 21:10:58 +00:00

Makefile

- Revert to NaN makefiles

2004-01-05 00:06:11 +00:00

readme.txt

This commit does very little for the number of files touched.

2005-12-02 21:13:14 +00:00

SConscript

==SCons==

2006-02-07 21:24:36 +00:00

readme.txt

The following 4 steps to adding a new image format to blender, its
probably easiest to look at the png code for a clean clear example,
animation formats are a bit more complicated but very similar:

Step 1:
create a new file named after the format for example lets say we were
creating an openexr read/writer  use openexr.c
It should contain functions to match the following prototypes:

struct ImBuf *imb_loadopenexr(unsigned char *mem,int size,int flags);
/* Use one of the following depending on whats easyer for your file format */
short imb_saveopenexr(struct ImBuf *ibuf, FILE myfile, int flags);
short imb_saveopenexr(struct ImBuf *ibuf, char *myfile, int flags);

/* Used to test if its the correct format
int IMB_is_openexr(void *buf);

Step 2: 
Add your hooks to read and write the image format these go in
	writeimage.c and readimage.c  just look at how the others are done

Step 3: 
Add in IS_openexr to blender/source/blender/imbuf/IMB_imbuf_types.h
Add in R_openexr to source/blender/makesdna/DNA_scene_types.h

Step 4:
Add your hooks to the gui.
source/blender/src/buttons_scene.c
source/blender/src/toets.c
source/blender/src/writeimage.c

Step 5:
edit the following files:
blender/source/blender/imbuf/intern/util.c
blender/source/blender/src/filesel.c
blender/source/blender/src/screendump.c
and add your extension so that your format gets recognized in the thumbnails.

Step 6: 
Alter the build process:
For scons you need to edit blender/source/blender/imbuf/SConscript 
and add in your additional files to source_files.
For msvp you need to edit blender/projectfiles/blender/imbuf/BL_imbuf.dsp
and add in your additional files.
If you have any external library info you will also need to add that 
to the various build processes.

Step 7:
Its also good to add your image format to:
makepicstring in blender/source/blender/blenkernel/intern/image.c