diff --git a/common.h b/common.h
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+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef RECOVERY_COMMON_H
+#define RECOVERY_COMMON_H
+
+#include <stdio.h>
+
+// Initialize the graphics system.
+void ui_init();
+
+// Use KEY_* codes from <linux/input.h> or KEY_DREAM_* from "minui/minui.h".
+int ui_wait_key();            // waits for a key/button press, returns the code
+int ui_key_pressed(int key);  // returns >0 if the code is currently pressed
+int ui_text_visible();        // returns >0 if text log is currently visible
+void ui_clear_key_queue();
+
+// Write a message to the on-screen log shown with Alt-L (also to stderr).
+// The screen is small, and users may need to report these messages to support,
+// so keep the output short and not too cryptic.
+void ui_print(const char *fmt, ...);
+
+// Display some header text followed by a menu of items, which appears
+// at the top of the screen (in place of any scrolling ui_print()
+// output, if necessary).
+void ui_start_menu(char** headers, char** items);
+// Set the menu highlight to the given index, and return it (capped to
+// the range [0..numitems).
+int ui_menu_select(int sel);
+// End menu mode, resetting the text overlay so that ui_print()
+// statements will be displayed.
+void ui_end_menu();
+
+// Set the icon (normally the only thing visible besides the progress bar).
+enum {
+  BACKGROUND_ICON_NONE,
+  BACKGROUND_ICON_UNPACKING,
+  BACKGROUND_ICON_INSTALLING,
+  BACKGROUND_ICON_ERROR,
+  BACKGROUND_ICON_FIRMWARE_INSTALLING,
+  BACKGROUND_ICON_FIRMWARE_ERROR,
+  NUM_BACKGROUND_ICONS
+};
+void ui_set_background(int icon);
+
+// Get a malloc'd copy of the screen image showing (only) the specified icon.
+// Also returns the width, height, and bits per pixel of the returned image.
+// TODO: Use some sort of "struct Bitmap" here instead of all these variables?
+char *ui_copy_image(int icon, int *width, int *height, int *bpp);
+
+// Show a progress bar and define the scope of the next operation:
+//   portion - fraction of the progress bar the next operation will use
+//   seconds - expected time interval (progress bar moves at this minimum rate)
+void ui_show_progress(float portion, int seconds);
+void ui_set_progress(float fraction);  // 0.0 - 1.0 within the defined scope
+
+// Default allocation of progress bar segments to operations
+static const int VERIFICATION_PROGRESS_TIME = 60;
+static const float VERIFICATION_PROGRESS_FRACTION = 0.5;
+static const float DEFAULT_FILES_PROGRESS_FRACTION = 0.4;
+static const float DEFAULT_IMAGE_PROGRESS_FRACTION = 0.1;
+
+// Show a rotating "barberpole" for ongoing operations.  Updates automatically.
+void ui_show_indeterminate_progress();
+
+// Hide and reset the progress bar.
+void ui_reset_progress();
+
+#define LOGE(...) ui_print("E:" __VA_ARGS__)
+#define LOGW(...) fprintf(stderr, "W:" __VA_ARGS__)
+#define LOGI(...) fprintf(stderr, "I:" __VA_ARGS__)
+
+#if 0
+#define LOGV(...) fprintf(stderr, "V:" __VA_ARGS__)
+#define LOGD(...) fprintf(stderr, "D:" __VA_ARGS__)
+#else
+#define LOGV(...) do {} while (0)
+#define LOGD(...) do {} while (0)
+#endif
+
+#endif  // RECOVERY_COMMON_H