This looks like a lot but its a few small changes.

Summary: standardized imageformat functions(make function names similar, and
parameters in same order where relavant), small code cleanups, and
added a description of how to add an image format to blender.

Kent

Specifics:
merged png_decode.c and png_encode.c to png.c and cleaned function calls.

fixed some spacing in IMB_imbuf_types.h

casting cleanups:
        intern/amiga.c
        intern/ham.c
        intern/iris.c

Modified switch statements to have a default type to insure values are set:
        intern/antialias.c

Initalization of some vars and make types similar.
        intern/bitplanes.c

cleaned function calls, and changed if else to if's with return:
        intern/jpeg.c

added {}'s in multidemensional arrays.
        intern/matrix.h

Made a little cleaner to read, and matched above changes.
        intern/readimage.c
        intern/writeimage.c

1 files changed, 27 insertions, 0 deletions

diff --git a/source/blender/imbuf/readme.txt b/source/blender/imbuf/readme.txt
new file mode 100644
index 00000000000..d50cf82af89
--- /dev/null
+++ b/source/blender/imbuf/readme.txt
@@ -0,0 +1,27 @@
+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
+
+Step 4: 
+Add any external library info to the build process.
+