Enable EFIv1 compression in bmpbklk_utility.

utility/include/bmpblk_utility.h

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 #ifndef VBOOT_REFERENCE_BMPBLK_UTILITY_H_
 #define VBOOT_REFERENCE_BMPBLK_UTILITY_H_
 
 #include "bmpblk_header.h"
 
@@ skipping 46 matching lines @@
 
   /* Compress all the images using a given comression method. */
   void compress_all_images(const Compression compress);
 
   /* Contruct the bmpblock. */
   void pack_bmpblock();
 
   /* Write the bmpblock to a file */
   void write_to_bmpblock(const char *filename);
 
+  /* What compression to use for the images */
+  void force_compression(uint32_t compression);
+
  private:
   /* Clear all internal data. */
   void initialize();
 
   /* Elemental function called from load_from_config.
    * Load the config file (yaml format) and parse it. */
   void load_yaml_config(const char *filename);
 
   /* Elemental function called from load_from_config.
    * Load all image files into the internal variables. */
@@ skipping 21 matching lines @@
   const string read_image_file(const char *filename);
   ImageFormat get_image_format(const string content);
   uint32_t get_bmp_image_width(const string content);
   uint32_t get_bmp_image_height(const string content);
 
   /* Internal variable for storing the config of BmpBlock. */
   BmpBlockConfig config_;
 
   /* Internal variable for storing the content of BmpBlock. */
   string bmpblock_;
+
+  /* Internal variables to determine whether or not to specify compression */
+  bool set_compression_;                // true if we force it
+  uint32_t compression_;                // what we force it to
 };
 
 }  // namespace vboot_reference
 
 #endif  // VBOOT_REFERENCE_BMPBLK_UTILITY_H_