st/dri: add comment about the ifdef in dri_screen.c
diff --git a/src/gallium/state_trackers/dri/common/dri_screen.c b/src/gallium/state_trackers/dri/common/dri_screen.c
index cbd7563..821c1de 100644
--- a/src/gallium/state_trackers/dri/common/dri_screen.c
+++ b/src/gallium/state_trackers/dri/common/dri_screen.c
@@ -344,8 +344,11 @@
return dri_fill_in_modes(screen, pixel_bits);
}
-#ifndef __NOT_HAVE_DRM_H
-
+/**
+ * DRI driver virtual function table.
+ *
+ * DRI versions differ in their implementation of init_screen and swap_buffers.
+ */
const struct __DriverAPIRec driDriverAPI = {
.DestroyScreen = dri_destroy_screen,
.CreateContext = dri_create_context,
@@ -354,6 +357,9 @@
.DestroyBuffer = dri_destroy_buffer,
.MakeCurrent = dri_make_current,
.UnbindContext = dri_unbind_context,
+
+#ifndef __NOT_HAVE_DRM_H
+
.GetSwapInfo = dri_get_swap_info,
.GetDrawableMSC = driDrawableGetMSC32,
.WaitForMSC = driWaitForMSC32,
@@ -362,23 +368,14 @@
.InitScreen = dri1_init_screen,
.SwapBuffers = dri1_swap_buffers,
.CopySubBuffer = dri1_copy_sub_buffer,
-};
#else
-const struct __DriverAPIRec driDriverAPI = {
- .DestroyScreen = dri_destroy_screen,
- .CreateContext = dri_create_context,
- .DestroyContext = dri_destroy_context,
- .CreateBuffer = dri_create_buffer,
- .DestroyBuffer = dri_destroy_buffer,
- .MakeCurrent = dri_make_current,
- .UnbindContext = dri_unbind_context,
-
.InitScreen = drisw_init_screen,
.SwapBuffers = drisw_swap_buffers,
-};
#endif
+};
+
/* vim: set sw=3 ts=8 sts=3 expandtab: */