clang says:
error: non-constant-expression cannot be narrowed from type 'int'
to 'unsigned char' in initializer list [-Wc++11-narrowing]
so I explicitly cast affected stuff to unsigned char.
Some functions were missing that in the definition, others weren't,
all had it in the declarations.
Added mention of JPG and HDR formats at the top of the file
jo_jpeg.cpp is a Public Domain JPEG writer written by Jon Olick in 2012
http://www.jonolick.com/code.html
My changes to jo_jpeg:
* port to plain C89 (+ // comments, as supported by MSVC6)
* support for 2 comp input (Greyscale+Alpha, Alpha is ignored)
* use stbi__write_context abstraction instead of stdio for writing
* adjust names to stbiw-style
My guideline for the rules is the PNG loader (which I consider
"canonical"). In the _load functions, x and y are required but
comp is optional; in the _info functions, all three are optional.
Fixes issue #411 (and other related, unreported issues).
We tried but it was nothing but trouble. New rule: with
GCC/Clang, if you're compiling with -msse2, you get always-on
SSE2 code, otherwise you don't get any. Trying to ship
anything with proper runtime dispatch requires both working
around certain bugs and some fiddling with build settings,
which runs contrary to the intent of a one-file library,
so bail on it entirely.
Fixes issue #280.
Fixes issue #410.
