ecore_drm2: simplify API to get latest FB

What we've always wanted when getting the "current" FB is to get
the most recently submit one - this may be current, next, or pending.

Replace ecore_drm2_output_current_fb_get() with a function that gets the
most recent one - ecore_drm2_output_latest_fb_get().  Now callers don't
have to check the next buffer themselves first, and we don't have to
add an API for pending.

2 files changed, 12 insertions, 6 deletions

diff --git a/src/lib/ecore_drm2/Ecore_Drm2.h b/src/lib/ecore_drm2/Ecore_Drm2.h
index 013abb0a3f..ee5f54efa4 100644
--- a/src/lib/ecore_drm2/Ecore_Drm2.h
+++ b/src/lib/ecore_drm2/Ecore_Drm2.h
@@ -456,16 +456,20 @@ EAPI unsigned int ecore_drm2_output_crtc_get(Ecore_Drm2_Output *output);
 EAPI Ecore_Drm2_Fb *ecore_drm2_output_next_fb_get(Ecore_Drm2_Output *output);
 
 /**
- * Return the current Ecore_Drm2_Fb used on a given output
+ * Return the most recently set Ecore_Drm2_Fb for a given output
+ *
+ * This may be the currently scanned out buffer, a buffer currently being
+ * flipped to scanout, or a buffer that has been submit but may not
+ * actually ever hit scanout at all.
  *
  * @param output
  *
- * @return The current Ecore_Drm2_Fb used on this output, or NULL otherwise
+ * @return The latest Ecore_Drm2_Fb submit for this output, or NULL otherwise
  *
  * @ingroup Ecore_Drm2_Output_Group
- * @since 1.18
+ * @since 1.19
  */
-EAPI Ecore_Drm2_Fb *ecore_drm2_output_current_fb_get(Ecore_Drm2_Output *output);
+EAPI Ecore_Drm2_Fb *ecore_drm2_output_latest_fb_get(Ecore_Drm2_Output *output);
 
 /**
  * Set the next Ecore_Drm2_Fb to be used on a given output
diff --git a/src/lib/ecore_drm2/ecore_drm2_outputs.c b/src/lib/ecore_drm2/ecore_drm2_outputs.c
index fda51f3cb9..fc7e2ebe6c 100644
--- a/src/lib/ecore_drm2/ecore_drm2_outputs.c
+++ b/src/lib/ecore_drm2/ecore_drm2_outputs.c
@@ -945,10 +945,12 @@ ecore_drm2_output_next_fb_set(Ecore_Drm2_Output *output, Ecore_Drm2_Fb *fb)
 }
 
 EAPI Ecore_Drm2_Fb *
-ecore_drm2_output_current_fb_get(Ecore_Drm2_Output *output)
+ecore_drm2_output_latest_fb_get(Ecore_Drm2_Output *output)
 {
    EINA_SAFETY_ON_NULL_RETURN_VAL(output, NULL);
-   return output->current;
+   if (output->pending) return output->pending;
+   if (output->current) return output->current;
+   return output->next;
 }
 
 EAPI void