KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

egl/dri2: short-circuit dri2_make_current when possible 

If an application calls eglMakeCurrent with the same context and the same
draw and read surfaces as the current ones, there is no need to go
through all the work of unbinding/flushing the old context and binding
the new one.

While the EGL spec is a bit ambiguous here, it seems that the implicit
flush of the outgoing context only needs to be done when the context is
actually changed.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14379>
This commit is contained in:
Lucas Stach 2022-01-03 19:57:14 +01:00 committed by Marge Bot
parent b33ed5406a
commit 0d65f229c5
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/egl/drivers/dri2/egl_dri2.c
View File

@ -1783,6 +1783,13 @@ dri2_make_current(_EGLDisplay *disp, _EGLSurface *dsurf,
if (!_eglBindContext(ctx, dsurf, rsurf, &old_ctx, &old_dsurf, &old_rsurf))
return EGL_FALSE;
if (old_ctx == ctx && old_dsurf == dsurf && old_rsurf == rsurf) {
_eglPutSurface(old_dsurf);
_eglPutSurface(old_rsurf);
_eglPutContext(old_ctx);
return EGL_TRUE;
}
if (old_ctx) {
__DRIcontext *old_cctx = dri2_egl_context(old_ctx)->dri_context;
old_disp = old_ctx->Resource.Display;