[PATCH 10/12] glamor: Explain the weird EGL_NO_CONTEXT code.
Eric Anholt
eric at anholt.net
Fri Apr 18 11:40:08 PDT 2014
Signed-off-by: Eric Anholt <eric at anholt.net>
---
glamor/glamor_egl.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/glamor/glamor_egl.c b/glamor/glamor_egl.c
index 1755d23..54af275 100644
--- a/glamor/glamor_egl.c
+++ b/glamor/glamor_egl.c
@@ -97,8 +97,15 @@ glamor_egl_get_screen_private(ScrnInfoPtr scrn)
static void
glamor_egl_make_current(struct glamor_context *glamor_ctx)
{
+ /* There's only a single global dispatch table in Mesa. EGL, GLX,
+ * and AIGLX's direct dispatch table manipulation don't talk to
+ * each other. We need to set the context to NULL first to avoid
+ * EGL's no-op context change fast path when switching back to
+ * EGL.
+ */
eglMakeCurrent(glamor_ctx->display, EGL_NO_SURFACE,
EGL_NO_SURFACE, EGL_NO_CONTEXT);
+
if (!eglMakeCurrent(glamor_ctx->display,
EGL_NO_SURFACE, EGL_NO_SURFACE,
glamor_ctx->ctx)) {
--
1.9.2
More information about the xorg-devel
mailing list