Use frame timing and render time statistic to pace frames.
Right now the criteria are simple:
* Don't render multiple frames in one vblank cycle. Otherwise the
rendered frame will be delay multiple cycles, which isn't ideal.
* Start rendering as late as possible while still hitting vblank.
Refresh rate is estimated from a rolling average of frame timing. Render
time is predicted from the rolling maximum of past 128 frames. The
window size still needs to be investigated.
Remove glFinish calls and GL_MaxFramesAllowed=1, frame pacing superseeds
them.
Professionals might laugh at how rudimentary this is, but hopefully this
is better than what we had before. Which is absolutely nothing at all.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
We use the __GL_YIELD=usleep workaround when we detect the NVIDIA
driver, so we could use glFinish without the NVIDIA driver taking all
the CPU.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Fixes the following memory leaks reported by valgrind:
96 bytes in 1 blocks are definitely lost in loss record 54 of 111
at 0x483577F: malloc (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
by 0x49DB0DD: ??? (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x49D8FB4: ??? (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x49DA63E: ??? (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x49DA751: xcb_wait_for_reply (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x14B266: detect_driver (driver.c:34)
by 0x119949: session_init (compton.c:1879)
by 0x11AEF0: main (compton.c:2285)
96 bytes in 1 blocks are definitely lost in loss record 55 of 111
at 0x483577F: malloc (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
by 0x49DB0DD: ??? (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x49D8FB4: ??? (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x49DA63E: ??? (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x49DA751: xcb_wait_for_reply (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x14B266: detect_driver (driver.c:34)
by 0x11795E: redir_start (compton.c:1202)
by 0x115C76: paint_preprocess (compton.c:629)
by 0x1182BD: _draw_callback (compton.c:1380)
by 0x1184D0: draw_callback (compton.c:1426)
by 0x49BF292: ev_invoke_pending (in /usr/lib/x86_64-linux-gnu/libev.so.4.0.0)
by 0x49C3344: ev_run (in /usr/lib/x86_64-linux-gnu/libev.so.4.0.0)
Fixes the following memory leaks reported by valgrind:
32 bytes in 1 blocks are definitely lost in loss record 15 of 111
at 0x483577F: malloc (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
by 0x49DB0DD: ??? (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x49D8FB4: ??? (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x49DA63E: ??? (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x49DA751: xcb_wait_for_reply (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x14B16F: detect_driver (driver.c:20)
by 0x119949: session_init (compton.c:1879)
by 0x11AEF0: main (compton.c:2285)
32 bytes in 1 blocks are definitely lost in loss record 16 of 111
at 0x483577F: malloc (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
by 0x49DB0DD: ??? (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x49D8FB4: ??? (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x49DA63E: ??? (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x49DA751: xcb_wait_for_reply (in /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0)
by 0x14B16F: detect_driver (driver.c:20)
by 0x11795E: redir_start (compton.c:1202)
by 0x115C76: paint_preprocess (compton.c:629)
by 0x1182BD: _draw_callback (compton.c:1380)
by 0x1184D0: draw_callback (compton.c:1426)
by 0x49BF292: ev_invoke_pending (in /usr/lib/x86_64-linux-gnu/libev.so.4.0.0)
by 0x49C3344: ev_run (in /usr/lib/x86_64-linux-gnu/libev.so.4.0.0)
Also, free(randr_version) in the error path as well.
