[mutter] onscreen/native: Pass damage rectangles when page flipping

[Marge Bot <marge-bot src gnome org>]

commit b328c8cc8b0b31a4afe2bfc857c6ea5a2b837ef2
Author: Piotr Lopatka <piotr lopatka gmail com>
Date:   Fri Sep 3 20:01:59 2021 +0100

    onscreen/native: Pass damage rectangles when page flipping
    
    This commit passes damage rectangles metadata to the (KMS) primary
    plane.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1879>

 src/backends/native/meta-crtc-kms.c        |  4 +++-
 src/backends/native/meta-crtc-kms.h        |  6 +++---
 src/backends/native/meta-onscreen-native.c | 22 ++++++++++++++++++----
 3 files changed, 24 insertions(+), 8 deletions(-)
---
diff --git a/src/backends/native/meta-crtc-kms.c b/src/backends/native/meta-crtc-kms.c
index f1bc79146a..fde6481753 100644
--- a/src/backends/native/meta-crtc-kms.c
+++ b/src/backends/native/meta-crtc-kms.c
@@ -115,7 +115,7 @@ meta_crtc_kms_apply_transform (MetaCrtcKms            *crtc_kms,
                                       hw_transform);
 }
 
-void
+MetaKmsPlaneAssignment *
 meta_crtc_kms_assign_primary_plane (MetaCrtcKms   *crtc_kms,
                                     MetaDrmBuffer *buffer,
                                     MetaKmsUpdate *kms_update)
@@ -161,6 +161,8 @@ meta_crtc_kms_assign_primary_plane (MetaCrtcKms   *crtc_kms,
                                                    dst_rect,
                                                    flags);
   meta_crtc_kms_apply_transform (crtc_kms, plane_assignment);
+
+  return plane_assignment;
 }
 
 static GList *
diff --git a/src/backends/native/meta-crtc-kms.h b/src/backends/native/meta-crtc-kms.h
index f8d241bbb5..bd80835f98 100644
--- a/src/backends/native/meta-crtc-kms.h
+++ b/src/backends/native/meta-crtc-kms.h
@@ -48,9 +48,9 @@ void meta_crtc_kms_set_cursor_renderer_private (MetaCrtcKms    *crtc_kms,
 void meta_crtc_kms_apply_transform (MetaCrtcKms            *crtc_kms,
                                     MetaKmsPlaneAssignment *kms_plane_assignment);
 
-void meta_crtc_kms_assign_primary_plane (MetaCrtcKms   *crtc_kms,
-                                         MetaDrmBuffer *buffer,
-                                         MetaKmsUpdate *kms_update);
+MetaKmsPlaneAssignment * meta_crtc_kms_assign_primary_plane (MetaCrtcKms   *crtc_kms,
+                                                             MetaDrmBuffer *buffer,
+                                                             MetaKmsUpdate *kms_update);
 
 void meta_crtc_kms_set_mode (MetaCrtcKms   *crtc_kms,
                              MetaKmsUpdate *kms_update);
diff --git a/src/backends/native/meta-onscreen-native.c b/src/backends/native/meta-onscreen-native.c
index 112bd0d438..00b2d9f89c 100644
--- a/src/backends/native/meta-onscreen-native.c
+++ b/src/backends/native/meta-onscreen-native.c
@@ -416,7 +416,9 @@ static void
 meta_onscreen_native_flip_crtc (CoglOnscreen                *onscreen,
                                 MetaRendererView            *view,
                                 MetaCrtc                    *crtc,
-                                MetaKmsPageFlipListenerFlag  flags)
+                                MetaKmsPageFlipListenerFlag  flags,
+                                const int                   *rectangles,
+                                int                          n_rectangles)
 {
   MetaOnscreenNative *onscreen_native = META_ONSCREEN_NATIVE (onscreen);
   MetaRendererNative *renderer_native = onscreen_native->renderer_native;
@@ -430,6 +432,7 @@ meta_onscreen_native_flip_crtc (CoglOnscreen                *onscreen,
   MetaKmsUpdate *kms_update;
   MetaOnscreenNativeSecondaryGpuState *secondary_gpu_state = NULL;
   MetaDrmBuffer *buffer;
+  MetaKmsPlaneAssignment *plane_assignment;
 
   COGL_TRACE_BEGIN_SCOPED (MetaOnscreenNativeFlipCrtcs,
                            "Onscreen (flip CRTCs)");
@@ -456,8 +459,15 @@ meta_onscreen_native_flip_crtc (CoglOnscreen                *onscreen,
           buffer = secondary_gpu_state->gbm.next_fb;
         }
 
-      meta_crtc_kms_assign_primary_plane (crtc_kms, buffer, kms_update);
+      plane_assignment = meta_crtc_kms_assign_primary_plane (crtc_kms,
+                                                             buffer,
+                                                             kms_update);
 
+      if (rectangles != NULL && n_rectangles != 0)
+        {
+          meta_kms_plane_assignment_set_fb_damage (plane_assignment,
+                                                   rectangles, n_rectangles);
+        }
       break;
     case META_RENDERER_NATIVE_MODE_SURFACELESS:
       g_assert_not_reached ();
@@ -1081,7 +1091,9 @@ meta_onscreen_native_swap_buffers_with_damage (CoglOnscreen  *onscreen,
       meta_onscreen_native_flip_crtc (onscreen,
                                       onscreen_native->view,
                                       onscreen_native->crtc,
-                                      META_KMS_PAGE_FLIP_LISTENER_FLAG_NONE);
+                                      META_KMS_PAGE_FLIP_LISTENER_FLAG_NONE,
+                                      rectangles,
+                                      n_rectangles);
     }
   else
     {
@@ -1299,7 +1311,9 @@ meta_onscreen_native_direct_scanout (CoglOnscreen   *onscreen,
   meta_onscreen_native_flip_crtc (onscreen,
                                   onscreen_native->view,
                                   onscreen_native->crtc,
-                                  META_KMS_PAGE_FLIP_LISTENER_FLAG_DROP_ON_ERROR);
+                                  META_KMS_PAGE_FLIP_LISTENER_FLAG_DROP_ON_ERROR,
+                                  NULL,
+                                  0);
 
   kms_crtc = meta_crtc_kms_get_kms_crtc (META_CRTC_KMS (onscreen_native->crtc));
   kms_device = meta_kms_crtc_get_device (kms_crtc);