We find the oldest backbuffer we can, on the grounds that clients are
only going to keep a fixed history queue, so this gives them the
greatest chance of being able to use that queue via making sure
the age is ~always less than the depth of the swapchain
Reviewed-by: Daniel Stone <dani...@collabora.com>
Signed-off-by: Derek Foreman <der...@osg.samsung.com>
---
src/egl/drivers/dri2/platform_drm.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/src/egl/drivers/dri2/platform_drm.c
b/src/egl/drivers/dri2/platform_drm.c
index 2099314..f812ab5 100644
--- a/src/egl/drivers/dri2/platform_drm.c
+++ b/src/egl/drivers/dri2/platform_drm.c
@@ -215,13 +215,15 @@ get_back_bo(struct dri2_egl_surface *dri2_surf)
struct dri2_egl_display *dri2_dpy =
dri2_egl_display(dri2_surf->base.Resource.Display);
struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
+ int age = 0;
unsigned i;
if (dri2_surf->back == NULL) {
for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
- if (!dri2_surf->color_buffers[i].locked) {
+ if (!dri2_surf->color_buffers[i].locked &&
+ dri2_surf->color_buffers[i].age >= age) {
dri2_surf->back = &dri2_surf->color_buffers[i];
- break;
+ age = dri2_surf->color_buffers[i].age;
}
}
}
--
2.10.2
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