Expose native buffer handles

This is required for making accelerated compositors that do not
use OpenGL.

Change-Id: I76c735a971dc62344080aececc087c0495925b87
Reviewed-by: Louai Al-Khanji <louai.al-khanji@qt.io>
Reviewed-by: Johan Helsing <johan.helsing@qt.io>

2 files changed, 23 insertions, 0 deletions

diff --git a/src/compositor/compositor_api/qwaylandbufferref.cpp b/src/compositor/compositor_api/qwaylandbufferref.cpp
index 8f7c63f40..90b3f1c46 100644
--- a/src/compositor/compositor_api/qwaylandbufferref.cpp
+++ b/src/compositor/compositor_api/qwaylandbufferref.cpp
@@ -277,6 +277,26 @@ QOpenGLTexture *QWaylandBufferRef::toOpenGLTexture(int plane) const
     return d->buffer->toOpenGlTexture(plane);
 }
 
+/*!
+ * Returns the native handle for this buffer, and marks it as locked so it will not be
+ * released until unlockNativeBuffer() is called.
+ *
+ * Returns 0 if there is no native handle for this buffer, or if the lock was unsuccessful.
+ */
+quintptr QWaylandBufferRef::lockNativeBuffer()
+{
+    return d->buffer->lockNativeBuffer();
+}
+
+/*!
+ * Marks the native buffer as no longer in use. \a handle must correspond to the value returned by
+ * a previous call to lockNativeBuffer().
+ */
+void QWaylandBufferRef::unlockNativeBuffer(quintptr handle)
+{
+    d->buffer->unlockNativeBuffer(handle);
+}
+
 #endif
 
 QT_END_NAMESPACE
diff --git a/src/compositor/compositor_api/qwaylandbufferref.h b/src/compositor/compositor_api/qwaylandbufferref.h
index 549ea0a80..06486ef3a 100644
--- a/src/compositor/compositor_api/qwaylandbufferref.h
+++ b/src/compositor/compositor_api/qwaylandbufferref.h
@@ -103,6 +103,9 @@ public:
     QOpenGLTexture *toOpenGLTexture(int plane = 0) const;
 #endif
 
+    quintptr lockNativeBuffer();
+    void unlockNativeBuffer(quintptr handle);
+
 private:
     explicit QWaylandBufferRef(QtWayland::ClientBuffer *buffer);
     QtWayland::ClientBuffer *buffer() const;