Display: Add support in libqcomui to check FB update

This change adds support in libqcomui to check if FB is updated
by a composition type

Change-Id: Ic23f24d95166cb9b1a03614f1c0fd562f321a1fd

libhwcomposer/hwcomposer.cpp

@@ -54,12 +54,6 @@ enum {
     COMPOSITION_TYPE_DYN = 0x8
 };
 
-enum HWCCompositionType {
-    HWC_USE_GPU = HWC_FRAMEBUFFER, // This layer is to be handled by Surfaceflinger
-    HWC_USE_OVERLAY = HWC_OVERLAY, // This layer is to be handled by the overlay
-    HWC_USE_COPYBIT                // This layer is to be handled by copybit
-};
-
 enum HWCLayerType{
     HWC_SINGLE_VIDEO           = 0x1,
     HWC_ORIG_RESOLUTION        = 0x2,

libqcomui/qcom_ui.cpp

@@ -291,3 +291,23 @@ int getPerFrameFlags(int hwclFlags, int layerFlags) {
     return flags;
 }
 
+
+/*
+ * Checks if FB is updated by this composition type
+ *
+ * @param: composition type
+ * @return: true if FB is updated, false if not
+ */
+
+bool isUpdatingFB(HWCCompositionType compositionType)
+{
+    switch(compositionType)
+    {
+        case HWC_USE_COPYBIT:
+            return true;
+        default:
+            LOGE("%s: invalid composition type(%d)", __FUNCTION__, compositionType);
+            return false;
+    };
+}
+

libqcomui/qcom_ui.h

@@ -32,6 +32,7 @@
 
 #include <cutils/native_handle.h>
 #include <ui/GraphicBuffer.h>
+#include <hardware/hwcomposer.h>
 
 using android::sp;
 using android::GraphicBuffer;
@@ -68,6 +69,12 @@ enum {
     HWC_COMP_BYPASS             = 0x40000000,
 };
 
+enum HWCCompositionType {
+    HWC_USE_GPU = HWC_FRAMEBUFFER, // This layer is to be handled by Surfaceflinger
+    HWC_USE_OVERLAY = HWC_OVERLAY, // This layer is to be handled by the overlay
+    HWC_USE_COPYBIT                // This layer is to be handled by copybit
+};
+
 /*
  * Structure to hold the buffer geometry
  */
@@ -155,4 +162,13 @@ int updateLayerQcomFlags(eLayerAttrib attribute, bool enable, int& currentFlags)
  */
 int getPerFrameFlags(int hwclFlags, int layerFlags);
 
+/*
+ * Checks if FB is updated by this composition type
+ *
+ * @param: composition type
+ * @return: true if FB is updated, false if not
+ */
+
+bool isUpdatingFB(HWCCompositionType compositionType);
+
 #endif // INCLUDE_LIBQCOM_UI