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| author | Gert Wollny <gert.wollny@collabora.com> | 2024-09-11 09:14:30 +0000 |
|---|---|---|
| committer | Philippe Mathieu-Daudé <philmd@linaro.org> | 2024-09-13 20:12:16 +0200 |
| commit | ae23cd00170baaa2777eb1ee87b70f472dbb3c44 (patch) | |
| tree | e09b2dddb3fa6a81cee02229ade49ea0ab54829e | |
| parent | eaea80315f8237715dd83ae7c55ad4280f66db7c (diff) | |
| download | focaccia-qemu-ae23cd00170baaa2777eb1ee87b70f472dbb3c44.tar.gz focaccia-qemu-ae23cd00170baaa2777eb1ee87b70f472dbb3c44.zip | |
ui/sdl2: set swap interval explicitly when OpenGL is enabled
Before 176e3783f2ab (ui/sdl2: OpenGL window context) SDL_CreateRenderer was called unconditionally setting the swap interval to 0. Since SDL_CreateRenderer is now no longer called when OpenGL is enabled, the swap interval is no longer set explicitly and vsync handling depends on the environment settings which may lead to a performance regression with virgl as reported in https://gitlab.com/qemu-project/qemu/-/issues/2565 Restore the old vsync handling by explicitly calling SDL_GL_SetSwapInterval if OpenGL is enabled. Fixes: 176e3783f2ab (ui/sdl2: OpenGL window context) Closes: https://gitlab.com/qemu-project/qemu/-/issues/2565 Signed-off-by: Gert Wollny <gert.wollny@collabora.com> Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-ID: <01020191e05ce6df-84da6386-62c2-4ce8-840e-ad216ac253dd-000000@eu-west-1.amazonses.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
| -rw-r--r-- | ui/sdl2.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/ui/sdl2.c b/ui/sdl2.c index e4cb66c5da..bd4f5a9da1 100644 --- a/ui/sdl2.c +++ b/ui/sdl2.c @@ -115,6 +115,7 @@ void sdl2_window_create(struct sdl2_console *scon) SDL_SetHint(SDL_HINT_RENDER_BATCHING, "1"); scon->winctx = SDL_GL_CreateContext(scon->real_window); + SDL_GL_SetSwapInterval(0); } else { /* The SDL renderer is only used by sdl2-2D, when OpenGL is disabled */ scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0); |