Use a status_t return type for GL functors

WebView needs more fine-grained control over the behavior of the
framework upon execution of the display lists. The new status_t
allows WebView to requests its functor to be re-executed directly
without causing a redraw of the entire hierarchy.

Change-Id: I97a8141dc5c6eeb6805b6024cc1e76fce07d24cc

1 files changed, 17 insertions, 0 deletions

diff --git a/include/private/hwui/DrawGlInfo.h b/include/private/hwui/DrawGlInfo.h
index 1e9912b..abcf41d 100644
--- a/include/private/hwui/DrawGlInfo.h
+++ b/include/private/hwui/DrawGlInfo.h
@@ -42,6 +42,23 @@ struct DrawGlInfo {
     float dirtyTop;
     float dirtyRight;
     float dirtyBottom;
+
+    /**
+     * Values used by OpenGL functors to tell the framework
+     * what to do next.
+     */
+    enum Status {
+        // The functor is done
+        kStatusDone,
+        // The functor is requesting a redraw (the clip rect
+        // used by the redraw is specified by DrawGlInfo.)
+        // The rest of the UI might redraw too.
+        kStatusDraw,
+        // The functor needs to be invoked again but will
+        // not redraw. Only the functor is invoked again
+        // (unless another functor requests a redraw.)
+        kStatusInvoke
+    };
 }; // struct DrawGlInfo
 
 }; // namespace uirenderer