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Merge opengl-{,m}swc vsync methods 

Both methods are redundant. Prefer Mesa's own extension when available,
fall back to the old SGI extension otherwise (NVIDIA drivers for the
most part).
This commit is contained in:
Dan Elkouby 2018-12-14 19:21:05 +02:00
parent 0899a9689e
commit de1cce21ba
2 changed files with 36 additions and 62 deletions
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4
man/compton.1.asciidoc
View File

@ -139,8 +139,8 @@ OPTIONS
* 'drm': VSync with 'DRM_IOCTL_WAIT_VBLANK'. May only work on some (DRI-based) drivers.
* 'opengl': Try to VSync with 'SGI_video_sync' OpenGL extension. Only work on some drivers.
* 'opengl-oml': Try to VSync with 'OML_sync_control' OpenGL extension. Only work on some drivers.
* 'opengl-swc': Try to VSync with 'SGI_swap_control' OpenGL extension. Only work on some drivers. Works only with GLX backend. Known to be most effective on many drivers. Does not guarantee to control paint timing.
* 'opengl-mswc': Try to VSync with 'MESA_swap_control' OpenGL extension. Basically the same as 'opengl-swc' above, except the extension we use.
* 'opengl-swc': Try to VSync with 'MESA_swap_control' or 'SGI_swap_control' (in order of preference) OpenGL extension. Works only with GLX backend. Known to be most effective on many drivers. Does not guarantee to control paint timing.
* 'opengl-mswc': Deprecated, use 'opengl-swc' instead.
(Note some VSync methods may not be enabled at compile time.)
--

92
src/compton.c
View File

@ -93,9 +93,6 @@ vsync_opengl_oml_wait(session_t *ps);
static void
vsync_opengl_swc_deinit(session_t *ps);
static void
vsync_opengl_mswc_deinit(session_t *ps);
#endif
static void
@ -195,7 +192,7 @@ static int (* const (VSYNC_FUNCS_WAIT[NUM_VSYNC]))(session_t *ps) = {
static void (* const (VSYNC_FUNCS_DEINIT[NUM_VSYNC]))(session_t *ps) = {
#ifdef CONFIG_OPENGL
[VSYNC_OPENGL_SWC ] = vsync_opengl_swc_deinit,
[VSYNC_OPENGL_MSWC ] = vsync_opengl_mswc_deinit,
[VSYNC_OPENGL_MSWC ] = vsync_opengl_swc_deinit,
#endif
};
@ -3478,11 +3475,8 @@ usage(int ret) {
" work on some drivers." WARNING"\n"
" opengl-oml = Try to VSync with OML_sync_control OpenGL extension.\n"
" Only work on some drivers." WARNING"\n"
" opengl-swc = Try to VSync with SGI_swap_control OpenGL extension.\n"
" Only work on some drivers. Works only with GLX backend." WARNING "\n"
" opengl-mswc = Try to VSync with MESA_swap_control OpenGL\n"
" extension. Basically the same as opengl-swc above, except the\n"
" extension we use." WARNING "\n"
" opengl-swc = Enable driver-level VSync. Works only with GLX backend." WARNING "\n"
" opengl-mswc = Deprecated, use opengl-swc instead." WARNING "\n"
"\n"
"--vsync-aggressive\n"
" Attempt to send painting request before VBlank and do XFlush()\n"
@ -4541,30 +4535,45 @@ vsync_opengl_oml_init(session_t *ps) {
}
static bool
vsync_opengl_swc_init(session_t *ps) {
#ifdef CONFIG_OPENGL
vsync_opengl_swc_swap_interval(session_t *ps, unsigned int interval) {
if (!ensure_glx_context(ps))
return false;
if (!glx_hasglxext(ps, "GLX_SGI_swap_control")) {
printf_errf("(): Your driver doesn't support SGI_swap_control, giving up.");
if (!ps->psglx->glXSwapIntervalProc && !ps->psglx->glXSwapIntervalMESAProc) {
if (glx_hasglxext(ps, "GLX_MESA_swap_control")) {
ps->psglx->glXSwapIntervalMESAProc = (f_SwapIntervalMESA)
glXGetProcAddress ((const GLubyte *) "glXSwapIntervalMESA");
} else if (glx_hasglxext(ps, "GLX_SGI_swap_control")) {
ps->psglx->glXSwapIntervalProc = (f_SwapIntervalSGI)
glXGetProcAddress ((const GLubyte *) "glXSwapIntervalSGI");
} else {
printf_errf("(): Your driver doesn't support SGI_swap_control nor MESA_swap_control, giving up.");
return false;
}
}
if (ps->psglx->glXSwapIntervalMESAProc)
ps->psglx->glXSwapIntervalMESAProc(interval);
else if (ps->psglx->glXSwapIntervalProc)
ps->psglx->glXSwapIntervalProc(interval);
else
return false;
return true;
}
static bool
vsync_opengl_swc_init(session_t *ps) {
#ifdef CONFIG_OPENGL
if (!bkend_use_glx(ps)) {
printf_errf("(): I'm afraid glXSwapIntervalSGI wouldn't help if you are "
printf_errf("(): I'm afraid OpenGL swap control wouldn't help if you are "
"not using GLX backend. You could try, nonetheless.");
}
// Get video sync functions
if (!ps->psglx->glXSwapIntervalProc)
ps->psglx->glXSwapIntervalProc = (f_SwapIntervalSGI)
glXGetProcAddress ((const GLubyte *) "glXSwapIntervalSGI");
if (!ps->psglx->glXSwapIntervalProc) {
printf_errf("(): Failed to get SGI_swap_control function.");
if (!vsync_opengl_swc_swap_interval(ps, 1)) {
printf_errf("(): Failed to load a swap control extension.");
return false;
}
ps->psglx->glXSwapIntervalProc(1);
return true;
#else
@ -4575,35 +4584,8 @@ vsync_opengl_swc_init(session_t *ps) {
static bool
vsync_opengl_mswc_init(session_t *ps) {
#ifdef CONFIG_OPENGL
if (!ensure_glx_context(ps))
return false;
if (!glx_hasglxext(ps, "GLX_MESA_swap_control")) {
printf_errf("(): Your driver doesn't support MESA_swap_control, giving up.");
return false;
}
if (!bkend_use_glx(ps)) {
printf_errf("(): I'm afraid glXSwapIntervalMESA wouldn't help if you are "
"not using GLX backend. You could try, nonetheless.");
}
// Get video sync functions
if (!ps->psglx->glXSwapIntervalMESAProc)
ps->psglx->glXSwapIntervalMESAProc = (f_SwapIntervalMESA)
glXGetProcAddress ((const GLubyte *) "glXSwapIntervalMESA");
if (!ps->psglx->glXSwapIntervalMESAProc) {
printf_errf("(): Failed to get MESA_swap_control function.");
return false;
}
ps->psglx->glXSwapIntervalMESAProc(1);
return true;
#else
printf_errf("(): Program not compiled with OpenGL VSync support.");
return false;
#endif
printf_errf("(): opengl-mswc is deprecated, please use opengl-swc instead.");
return vsync_opengl_swc_init(ps);
}
#ifdef CONFIG_OPENGL
@ -4639,15 +4621,7 @@ vsync_opengl_oml_wait(session_t *ps) {
static void
vsync_opengl_swc_deinit(session_t *ps) {
// The standard says it doesn't accept 0, but in fact it probably does
if (glx_has_context(ps) && ps->psglx->glXSwapIntervalProc)
ps->psglx->glXSwapIntervalProc(0);
}
static void
vsync_opengl_mswc_deinit(session_t *ps) {
if (glx_has_context(ps) && ps->psglx->glXSwapIntervalMESAProc)
ps->psglx->glXSwapIntervalMESAProc(0);
vsync_opengl_swc_swap_interval(ps, 0);
}
#endif