Commit Graph

18 Commits

Author SHA1 Message Date
Ryan Houdek 92e9382e61 Confirm with hardware test that the high bit of the input form is ignored.
Thanks to Ornox for testing
2016-02-29 16:45:51 -06:00
Lioncash 1df1ba55bb VideoCommon: Convert some DataReader includes into forward declarations
Gets rid of some indirect inclusions in cpp files.
Also this will reduce the amount of rebuilt files if
changes occur in the DataReader header.
2016-01-31 15:19:20 -05:00
Lioncash b5b304cff2 VertexShaderManager: Get rid of float pointer casts 2015-10-15 23:34:54 -04:00
Lioncash c760ffbd28 BPMemory/XFMemory: Convert defines to enums
These actually convey a concrete type, as well as also providing a
symbolic constant during debugging.
2015-09-01 12:07:10 -04:00
Tillmann Karras 30ebb2459e Set copyright year to when a file was created 2015-05-25 13:22:31 +02:00
Tillmann Karras cefcb0ace9 Update license headers to GPLv2+ 2015-05-25 13:22:31 +02:00
NanoByte011 f475e367f2 Lighting Attenuation Fixes 2015-01-21 15:55:32 -07:00
degasus 21970c4a2a VideoCommon: cleanup OpcodeDecoder 2014-12-09 18:56:27 +01:00
comex 65af90669b Add the 'desynced GPU thread' mode.
It's a relatively big commit (less big with -w), but it's hard to test
any of this separately...

The basic problem is that in netplay or movies, the state of the CPU
must be deterministic, including when the game receives notification
that the GPU has processed FIFO data.  Dual core mode notifies the game
whenever the GPU thread actually gets around to doing the work, so it
isn't deterministic.  Single core mode is because it notifies the game
'instantly' (after processing the data synchronously), but it's too slow
for many systems and games.

My old dc-netplay branch worked as follows: everything worked as normal
except the state of the CP registers was a lie, and the CPU thread only
delivered results when idle detection triggered (waiting for the GPU if
they weren't ready at that point).  Usually, a game is idle iff all the
work for the frame has been done, except for a small amount of work
depending on the GPU result, so neither the CPU or the GPU waiting on
the other affected performance much.  However, it's possible that the
game could be waiting for some earlier interrupt, and any of several
games which, for whatever reason, never went into a detectable idle
(even when I tried to improve the detection) would never receive results
at all.  (The current method should have better compatibility, but it
also has slightly higher overhead and breaks some other things, so I
want to reimplement this, hopefully with less impact on the code, in the
future.)

With this commit, the basic idea is that the CPU thread acts as if the
work has been done instantly, like single core mode, but actually hands
it off asynchronously to the GPU thread (after backing up some data that
the game might change in memory before it's actually done).  Since the
work isn't done, any feedback from the GPU to the CPU, such as real
XFB/EFB copies (virtual are OK), EFB pokes, performance queries, etc. is
broken; but most games work with these options disabled, and there is no
need to try to detect what the CPU thread is doing.

Technically: when the flag g_use_deterministic_gpu_thread (currently
stuck on) is on, the CPU thread calls RunGpu like in single core mode.
This function synchronously copies the data from the FIFO to the
internal video buffer and updates the CP registers, interrupts, etc.
However, instead of the regular ReadDataFromFifo followed by running the
opcode decoder, it runs ReadDataFromFifoOnCPU ->
OpcodeDecoder_Preprocess, which relatively quickly scans through the
FIFO data, detects SetFinish calls etc., which are immediately fired,
and saves certain associated data from memory (e.g. display lists) in
AuxBuffers (a parallel stream to the main FIFO, which is a bit slow at
the moment), before handing the data off to the GPU thread to actually
render.  That makes up the bulk of this commit.

In various circumstances, including the aforementioned EFB pokes and
performance queries as well as swap requests (i.e. the end of a frame -
we don't want the CPU potentially pumping out frames too quickly and the
GPU falling behind*), SyncGPU is called to wait for actual completion.

The overhead mainly comes from OpcodeDecoder_Preprocess (which is,
again, synchronous), as well as the actual copying.

Currently, display lists and such are escrowed from main memory even
though they usually won't change over the course of a frame, and
textures are not even though they might, resulting in a small chance of
graphical glitches.  When the texture locking (i.e. fault on write) code
lands, I can make this all correct and maybe a little faster.

* This suggests an alternate determinism method of just delaying results
until a short time before the end of each frame.  For all I know this
might mostly work - I haven't tried it - but if any significant work
hinges on the competion of render to texture etc., the frame will be
missed.
2014-09-28 21:34:29 -04:00
Rohit Nirmal fbc64984ca Include CommonTypes.h instead of Common.h. 2014-09-08 15:39:58 -04:00
degasus ef6f6a7fa9 VideoCommon: remove XFReg copy optimization
This code is just ugly and I doubt there is a way that copying twice is faster.
2014-09-04 17:56:17 +02:00
degasus 027baad73b VideoCommon: use the Light struct in XF memory 2014-06-19 16:33:29 +02:00
magumagu 1357277f40 Video backends: mass-replace "xfregs" with "xfmem". 2014-05-16 18:58:07 -07:00
magumagu 8f5342c442 Video backend: merge global var xfmem into xfregs.
There isn't really any reason to keep them separate.
2014-05-16 18:55:31 -07:00
magumagu 818c89313e Video backends: unify xfregs/xfmem structures.
Removes the duplicate swxfregs global variable/struct from the software
backend in favor of the ones from VideoCommon.
2014-05-16 18:55:30 -07:00
Lioncash 2afe215271 Convert all includes to relative paths. 2014-02-18 02:19:10 -05:00
lioncash d2038049f5 Replace all include guard ifdefs with "#pragma once" 2014-02-10 18:07:16 -05:00
Jasper St. Pierre 34692ab826 Remove unnecessary Src/ folders 2013-12-31 14:03:19 -05:00