add support for RGBX_8888
diff --git a/opengl/libagl/copybit.cpp b/opengl/libagl/copybit.cpp
index 3c5bcdf3..867459d 100644
--- a/opengl/libagl/copybit.cpp
+++ b/opengl/libagl/copybit.cpp
@@ -75,6 +75,8 @@
 static bool supportedCopybitsFormat(int format) {
     switch (format) {
     case COPYBIT_FORMAT_RGBA_8888:
+    case COPYBIT_FORMAT_RGBX_8888:
+    case COPYBIT_FORMAT_RGB_888:
     case COPYBIT_FORMAT_RGB_565:
     case COPYBIT_FORMAT_BGRA_8888:
     case COPYBIT_FORMAT_RGBA_5551: