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-rw-r--r--src/mesa/state_tracker/st_cb_syncobj.c25
1 files changed, 18 insertions, 7 deletions
diff --git a/src/mesa/state_tracker/st_cb_syncobj.c b/src/mesa/state_tracker/st_cb_syncobj.c
index 1fa14039b59..123925aadfb 100644
--- a/src/mesa/state_tracker/st_cb_syncobj.c
+++ b/src/mesa/state_tracker/st_cb_syncobj.c
@@ -78,7 +78,8 @@ static void st_fence_sync(struct gl_context *ctx, struct gl_sync_object *obj,
static void st_check_sync(struct gl_context *ctx, struct gl_sync_object *obj)
{
- struct pipe_screen *screen = st_context(ctx)->pipe->screen;
+ struct pipe_context *pipe = st_context(ctx)->pipe;
+ struct pipe_screen *screen = pipe->screen;
struct st_sync_object *so = (struct st_sync_object*)obj;
/* If the fence doesn't exist, assume it's signalled. */
@@ -87,7 +88,7 @@ static void st_check_sync(struct gl_context *ctx, struct gl_sync_object *obj)
return;
}
- if (screen->fence_finish(screen, NULL, so->fence, 0)) {
+ if (screen->fence_finish(screen, pipe, so->fence, 0)) {
screen->fence_reference(screen, &so->fence, NULL);
so->b.StatusFlag = GL_TRUE;
}
@@ -97,7 +98,8 @@ static void st_client_wait_sync(struct gl_context *ctx,
struct gl_sync_object *obj,
GLbitfield flags, GLuint64 timeout)
{
- struct pipe_screen *screen = st_context(ctx)->pipe->screen;
+ struct pipe_context *pipe = st_context(ctx)->pipe;
+ struct pipe_screen *screen = pipe->screen;
struct st_sync_object *so = (struct st_sync_object*)obj;
/* If the fence doesn't exist, assume it's signalled. */
@@ -106,11 +108,20 @@ static void st_client_wait_sync(struct gl_context *ctx,
return;
}
- /* We don't care about GL_SYNC_FLUSH_COMMANDS_BIT, because flush is
- * already called when creating a fence. */
-
+ /* Section 4.1.2 of OpenGL 4.5 (Compatibility Profile) says:
+ * [...] if ClientWaitSync is called and all of the following are true:
+ * - the SYNC_FLUSH_COMMANDS_BIT bit is set in flags,
+ * - sync is unsignaled when ClientWaitSync is called,
+ * - and the calls to ClientWaitSync and FenceSync were issued from
+ * the same context,
+ * then the GL will behave as if the equivalent of Flush were inserted
+ * immediately after the creation of sync.
+ *
+ * Assume GL_SYNC_FLUSH_COMMANDS_BIT is always set, because applications
+ * forget to set it.
+ */
if (so->fence &&
- screen->fence_finish(screen, NULL, so->fence, timeout)) {
+ screen->fence_finish(screen, pipe, so->fence, timeout)) {
screen->fence_reference(screen, &so->fence, NULL);
so->b.StatusFlag = GL_TRUE;
}