OSX build was a bit broken, it needs to be linked against zlib.
Furthermore it now uses the systems libSDL2 framework, unless you use
-DUSE_SYSTEM_SDL2=FALSE
i386 ASM is now disabled by default, we have plain C fallbacks for
everything that seems to work well enough (and if not they need more
testing which is likely to happen this way)
The tags are often initially assigned from pointers and then copied
around, even from one tag type to the other.
As BSPTree::MoveSubTreeToArray() uses them to get the original pointer,
we need the pointers anyway, so just CRC-ing the pointers doesn't seem
like a good option. As the tags are assigned from other tag-types
sometimes, I probably would have needed to add Pointers for the same
values in addition to the ULONG tags, that are also copied around along
the tags, to keep the tags ULONG - that seemed like a worse alternative.
However, when writing (via BSPTree::Write_t()) the bn_ulPlaneTag tag
needs to be ULONG, so there I actually use CRC for 64bit pointers (via
IntPtrToID()) - when restoring (in Read_t()), the pointers aren't valid
anymore anyway, so that all should somehow be fine.
I assume that Write_t() is only used by the Editor, anyway, so I fear I
won't be able to test that part of the code on Linux anytime soon.
Sometimes pointers are casted to ULONG just to get an ID or tag - this
is fine for 32bit pointers, but 64bit pointers will truncate which might
result in not being so unique after all.
CRC-ing the pointer should yield a more likely to be unique 32bit value.
NULL is a special case that yields 0 instead of the CRC, so code that
handles IDs/Tags with value 0 differently will continue to work.
For 32bit builds, it just returns the pointer as ULONG.
turns out that using UINTPTR_MAX is a pain on several systems like
FreeBSD or even older Linux/glibc systems, so maybe let's not do that
anymore.
Now I check for known CPU-architectures instead.
I also added some sanity checks to make sure the detection was
correct.
bswap_32() is a function specific to Linux, unavailable on FreeBSD and
OS X. Instead of messing with other platform specific functions, #ifdef
and so on provide a fast inline implementation.
* td_pulObjects is explicitly set to NULL in the constructor - before
only td_ulObject was set to NONE (0), so on 64bit half of
td_pulObjects bytes would remain garbage
* only check td_ulObject for NONE if td_ctFrames <= 1 (until now it
would frequently check it for NONE even if td_ctFrames > 1, if
td_pulObjects was != NULL)
some versions of gcc want to inline DitherBitmap(), and this leads to trouble:
Sources/Engine/Graphics/Graphics.cpp:1167: Error: symbol `rowLoopE' is already defined
Sources/Engine/Graphics/Graphics.cpp:1170: Error: symbol `pixLoopEL' is already defined
...
((ULONG*)td_ulObject)[iFr] is fishy - and ULONG td_ulObject already is
in an union with ULONG* td_pulObjects, so use td_pulObjects when
appropriate (i.e. if td_ctFrames>1)
Also fixed some checks accordingly.
The code used to store the world pointer as a console variable
"pwoCurrentWorld" of type INDEX (int32) - that won't work for 64bit, so
I added CShell::SetCurrentWorld() and CShell::GetCurrentWorld() and
store it as a pointer.
ssam expects lib* to be in the Debug subdir, so make cmake put it there,
this way it's easier to copy the binaries to your install/Bin/ dir to
test.
clang gives a lot of -Wlogical-op-parentheses warnings, suppress them.
introduced PLATFORM_32BIT and PLATFORM_64BIT macros, so you can do
#ifdef PLATFORM_64BIT if you need to.
I needed that for CDrawPort::GetID() to properly CRC a pointer.
Also added a sanity check in Engine/Base/Types.h that makes sure that
uintprt_t and size_t have the same size, as the code uses size_t to
store pointers (or cast from pointer to int) all over the place.
Made some "tags" from Engine/Templates/BSP_internal.h size_t instead of
ULONG - they're used to store pointers to identify vertices and such,
so they'd better be big enough to actually store a pointer.
Some more are still missing.
* FloatToInt() should now round correctly ot nearest, even for
negative numbers
* Log2() now calls log2f() instead of log10()*3.321 - no idea what the
previous code was about, I doubt it's faster (and the ASM code uses
something like log2, too).
* FastLog2() (for integers) now uses __builtin_clz() when building with
GCC/clang - the resulting ASM should be pretty similar to the inline
ASM below. I wonder why that function takes signed ints, log2(-1) in
reality is an irrational number (but the function returns 31)..
Also, both the inline ASM and my version return 0 for Log2(0), but
INT_MIN would be closer to the truth
* commented out FastMaxLog2(), it's unused.
* implemented _rotl() using a fast(er) trick from
http://blog.regehr.org/archives/1063
Set the ENABLE_EXPORTS property on the main executables, which adds
linker flag -rdynamic if the compiler supports it. This ensures symbols
are available for dynamic objects (such as shared libEntitiesMPD.so) to
use.
