package/webkitgtk: use the WPE renderer if available

If enabled at build time, WebKit's internal nested compositor can work
more efficiently when targeting Wayland, by avoiding one unneeded buffer
copy. The build option has been available for a few years in WebKitGTK
releases.

Signed-off-by: Adrian Perez de Castro <aperez@igalia.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/webkitgtk/webkitgtk.mk

@@ -28,8 +28,7 @@ WEBKITGTK_CONF_OPTS = \
 	-DUSE_LIBHYPHEN=OFF \
 	-DUSE_OPENJPEG=ON \
 	-DUSE_SOUP2=ON \
-	-DUSE_WOFF2=ON \
-	-DUSE_WPE_RENDERER=OFF
+	-DUSE_WOFF2=ON
 
 ifeq ($(BR2_PACKAGE_WEBKITGTK_SANDBOX),y)
 WEBKITGTK_CONF_OPTS += \
@@ -101,6 +100,13 @@ WEBKITGTK_CONF_OPTS += -DENABLE_WAYLAND_TARGET=ON
 endif
 endif
 
+ifeq ($(BR2_PACKAGE_LIBGTK3_WAYLAND)$(BR2_PACKAGE_WPEBACKEND_FDO),yy)
+WEBKITGTK_CONF_OPTS += -DUSE_WPE_RENDERER=ON
+WEBKITGTK_DEPENDENCIES += wpebackend-fdo
+else
+WEBKITGTK_CONF_OPTS += -DUSE_WPE_RENDERER=OFF
+endif
+
 ifeq ($(BR2_PACKAGE_WEBKITGTK_USE_GSTREAMER_GL),y)
 WEBKITGTK_CONF_OPTS += -DUSE_GSTREAMER_GL=ON
 else