Fix KMSDRM double buffering.
diff --git a/src/video/kmsdrm/SDL_kmsdrmopengles.c b/src/video/kmsdrm/SDL_kmsdrmopengles.c
index 9b34d68..cbf86c9 100644
--- a/src/video/kmsdrm/SDL_kmsdrmopengles.c
+++ b/src/video/kmsdrm/SDL_kmsdrmopengles.c
@@ -194,7 +194,7 @@
we have waited here, there won't be a pending pageflip so the
WaitPageflip at the beginning of this function will be a no-op.
Just leave it here and don't worry.
- Run your SDL2 program with "SDL_KMSDRM_DOUBLE_BUFFER=1 <program_name>"
+ Run your SDL2 program with "SDL_VIDEO_DOUBLE_BUFFER=1 <program_name>"
to enable this. */
if (windata->double_buffer) {
if (!KMSDRM_WaitPageflip(_this, windata)) {
diff --git a/src/video/kmsdrm/SDL_kmsdrmvideo.c b/src/video/kmsdrm/SDL_kmsdrmvideo.c
index e445792..307b4b6 100644
--- a/src/video/kmsdrm/SDL_kmsdrmvideo.c
+++ b/src/video/kmsdrm/SDL_kmsdrmvideo.c
@@ -1478,6 +1478,12 @@
windata->viddata = viddata;
window->driverdata = windata;
+ /* Do we want a double buffering scheme to get low video lag? */
+ windata->double_buffer = SDL_FALSE;
+ if (SDL_GetHintBoolean(SDL_HINT_VIDEO_DOUBLE_BUFFER, SDL_FALSE)) {
+ windata->double_buffer = SDL_TRUE;
+ }
+
if (!is_vulkan && !vulkan_mode) { /* NON-Vulkan block. */
/* Maybe you didn't ask for an OPENGL window, but that's what you will get.
