Pass around what kind of transparency an image actually needs. Use
[wine] / dlls / mapi32 /
drwxr-xr-x   ..
-rw-r--r-- 51 .cvsignore
-rw-r--r-- 338 Makefile.in
-rw-r--r-- 4755 imalloc.c
-rw-r--r-- 7102 mapi32.spec
-rw-r--r-- 2514 mapi32_main.c
-rw-r--r-- 84897 prop.c
drwxr-xr-x - tests
-rw-r--r-- 22734 util.c