Day 47

added conversion between rgba -> bgra -> rgba when locking and unlocking, because CPU code expects textures in BGRA, so I have correct colors now

also fixed very interesting issue.

fors code was like this:

unsigned long s_textureHandle[] = {-1, -1, -1, -1};

clang was complaining that there is conversion or something like this, so I changed this to:

unsigned long s_textureHandle[] = {-1u, -1u, -1u, -1u};

and then today I’ve got a crash because of this conditional:

if(s_textureHandle[i] == -1) {
}

It was giving false, what happened in this case is:

1. -1u got converted into 0xffffffff, and promoted to long.
2. inside condition expression: -1 got promoted to unsigned long with sign extension, so first: it became -1 long, and then converted to unsigned 0xffffffffffffffff, and suddenly it all broke

before it worked, of course. because in construction of s_textureHandle[] -1 got converted to 0xffffffffffffffff as well.

phew, I have to be more carefull with those longs