gralloc: new function to query the gem handle of buffer_handle_t

This function can be used from Mesa instead of having to expose the
whole gralloc_drm_handle_t structure.

Change-Id: I1aa5368b21e588d5d711c1005fff2a5296e143a0
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/gralloc_drm.c b/gralloc_drm.c
index 63b5217..cf0fe84 100644
--- a/gralloc_drm.c
+++ b/gralloc_drm.c
@@ -348,6 +348,12 @@ buffer_handle_t gralloc_drm_bo_get_handle(struct gralloc_drm_bo_t *bo, int *stri
 	return &bo->handle->base;
 }
 
+int gralloc_drm_get_gem_handle(buffer_handle_t _handle)
+{
+	struct gralloc_drm_handle_t *handle = gralloc_drm_handle(_handle);
+	return (handle) ? handle->name : 0;
+}
+
 /*
  * Lock a bo.  XXX thread-safety?
  */
diff --git a/gralloc_drm.h b/gralloc_drm.h
index 716173a..6c13138 100644
--- a/gralloc_drm.h
+++ b/gralloc_drm.h
@@ -120,6 +120,7 @@ void gralloc_drm_bo_decref(struct gralloc_drm_bo_t *bo);
 
 struct gralloc_drm_bo_t *gralloc_drm_bo_from_handle(buffer_handle_t handle);
 buffer_handle_t gralloc_drm_bo_get_handle(struct gralloc_drm_bo_t *bo, int *stride);
+int gralloc_drm_get_gem_handle(buffer_handle_t handle);
 
 int gralloc_drm_bo_lock(struct gralloc_drm_bo_t *bo, int x, int y, int w, int h, int enable_write, void **addr);
 void gralloc_drm_bo_unlock(struct gralloc_drm_bo_t *bo);