add support for RGBX_8888
diff --git a/modules/gralloc/gralloc.cpp b/modules/gralloc/gralloc.cpp
index 54aa64c..d936cd3 100644
--- a/modules/gralloc/gralloc.cpp
+++ b/modules/gralloc/gralloc.cpp
@@ -369,9 +369,13 @@
         int bpp = 0;
         switch (format) {
             case HAL_PIXEL_FORMAT_RGBA_8888:
+            case HAL_PIXEL_FORMAT_RGBX_8888:
             case HAL_PIXEL_FORMAT_BGRA_8888:
                 bpp = 4;
                 break;
+            case HAL_PIXEL_FORMAT_RGB_888:
+                bpp = 3;
+                break;
             case HAL_PIXEL_FORMAT_RGB_565:
             case HAL_PIXEL_FORMAT_RGBA_5551:
             case HAL_PIXEL_FORMAT_RGBA_4444: