[PATCH hwc v2 11/18] drm_hwcomposer: Add utility functions to copy displaycomposition internals

[Alexandru Gheorghe]

Add utility functions to copy the DrmHwcLayer and DrmCompositionPlanes
from another DrmDisplayComposition.

Signed-off-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe at arm.com>
---
 drmdisplaycomposition.cpp | 29 +++++++++++++++++++++++++++++
 drmdisplaycomposition.h   |  3 +++
 2 files changed, 32 insertions(+)

diff --git a/drmdisplaycomposition.cpp b/drmdisplaycomposition.cpp
index 66e67a4..dd64f46 100644
--- a/drmdisplaycomposition.cpp
+++ b/drmdisplaycomposition.cpp
@@ -99,6 +99,35 @@ int DrmDisplayComposition::SetLayers(DrmHwcLayer *layers, size_t num_layers,
   return 0;
 }
 
+int DrmDisplayComposition::CopyLayers(DrmDisplayComposition *src) {
+  geometry_changed_ = true;
+  type_ = DRM_COMPOSITION_TYPE_FRAME;
+  std::shared_ptr<Importer> importer =
+      drm_->resource_manager()->GetImporter(crtc()->display());
+  if (!importer) {
+    ALOGE("Failed to find a valid importer");
+    return -EINVAL;
+  }
+  for (DrmHwcLayer &src_layer : src->layers()) {
+    DrmHwcLayer copy;
+    copy.PopulateFromDrmHwcLayer(&src_layer);
+    int ret = copy.ImportBuffer(importer.get(),
+                                drm_->resource_manager()->GetGralloc());
+    if (ret) {
+      ALOGE("Failed to import buffer ret = %d", ret);
+      return -EINVAL;
+    }
+    layers_.emplace_back(std::move(copy));
+  }
+  return 0;
+}
+
+void DrmDisplayComposition::CopyCompPlanes(DrmDisplayComposition *src) {
+  for (auto comp_plane : src->composition_planes()) {
+    composition_planes_.push_back(comp_plane);
+  }
+}
+
 int DrmDisplayComposition::SetDpmsMode(uint32_t dpms_mode) {
   if (!validate_composition_type(DRM_COMPOSITION_TYPE_DPMS))
     return -EINVAL;
diff --git a/drmdisplaycomposition.h b/drmdisplaycomposition.h
index 9183925..c646420 100644
--- a/drmdisplaycomposition.h
+++ b/drmdisplaycomposition.h
@@ -68,6 +68,7 @@ class DrmCompositionPlane {
 
   DrmCompositionPlane() = default;
   DrmCompositionPlane(DrmCompositionPlane &&rhs) = default;
+  DrmCompositionPlane(const DrmCompositionPlane &rhs) = default;
   DrmCompositionPlane &operator=(DrmCompositionPlane &&other) = default;
   DrmCompositionPlane(Type type, DrmPlane *plane, DrmCrtc *crtc)
       : type_(type), plane_(plane), crtc_(crtc) {
@@ -120,6 +121,8 @@ class DrmDisplayComposition {
            Planner *planner, uint64_t frame_no);
 
   int SetLayers(DrmHwcLayer *layers, size_t num_layers, bool geometry_changed);
+  int CopyLayers(DrmDisplayComposition *src);
+  void CopyCompPlanes(DrmDisplayComposition *src);
   int AddPlaneComposition(DrmCompositionPlane plane);
   int AddPlaneDisable(DrmPlane *plane);
   int SetDpmsMode(uint32_t dpms_mode);
-- 
2.7.4