diff --git a/ui.c b/ui.c
new file mode 100644
index 0000000..5d06561
--- /dev/null
+++ b/ui.c
@@ -0,0 +1,542 @@
+/*
+ * 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.
+ */
+
+#include <linux/input.h>
+#include <pthread.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/reboot.h>
+#include <sys/time.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "minui/minui.h"
+
+#define MAX_COLS 64
+#define MAX_ROWS 32
+
+#define CHAR_WIDTH 10
+#define CHAR_HEIGHT 18
+
+#define PROGRESSBAR_INDETERMINATE_STATES 6
+#define PROGRESSBAR_INDETERMINATE_FPS 15
+
+enum { LEFT_SIDE, CENTER_TILE, RIGHT_SIDE, NUM_SIDES };
+
+static pthread_mutex_t gUpdateMutex = PTHREAD_MUTEX_INITIALIZER;
+static gr_surface gBackgroundIcon[NUM_BACKGROUND_ICONS];
+static gr_surface gProgressBarIndeterminate[PROGRESSBAR_INDETERMINATE_STATES];
+static gr_surface gProgressBarEmpty[NUM_SIDES];
+static gr_surface gProgressBarFill[NUM_SIDES];
+
+static const struct { gr_surface* surface; const char *name; } BITMAPS[] = {
+    { &gBackgroundIcon[BACKGROUND_ICON_UNPACKING],  "icon_unpacking" },
+    { &gBackgroundIcon[BACKGROUND_ICON_INSTALLING], "icon_installing" },
+    { &gBackgroundIcon[BACKGROUND_ICON_ERROR],      "icon_error" },
+    { &gBackgroundIcon[BACKGROUND_ICON_FIRMWARE_INSTALLING],
+        "icon_firmware_install" },
+    { &gBackgroundIcon[BACKGROUND_ICON_FIRMWARE_ERROR],
+        "icon_firmware_error" },
+    { &gProgressBarIndeterminate[0],    "indeterminate1" },
+    { &gProgressBarIndeterminate[1],    "indeterminate2" },
+    { &gProgressBarIndeterminate[2],    "indeterminate3" },
+    { &gProgressBarIndeterminate[3],    "indeterminate4" },
+    { &gProgressBarIndeterminate[4],    "indeterminate5" },
+    { &gProgressBarIndeterminate[5],    "indeterminate6" },
+    { &gProgressBarEmpty[LEFT_SIDE],    "progress_bar_empty_left_round" },
+    { &gProgressBarEmpty[CENTER_TILE],  "progress_bar_empty" },
+    { &gProgressBarEmpty[RIGHT_SIDE],   "progress_bar_empty_right_round" },
+    { &gProgressBarFill[LEFT_SIDE],     "progress_bar_left_round" },
+    { &gProgressBarFill[CENTER_TILE],   "progress_bar_fill" },
+    { &gProgressBarFill[RIGHT_SIDE],    "progress_bar_right_round" },
+    { NULL,                             NULL },
+};
+
+static gr_surface gCurrentIcon = NULL;
+
+static enum ProgressBarType {
+    PROGRESSBAR_TYPE_NONE,
+    PROGRESSBAR_TYPE_INDETERMINATE,
+    PROGRESSBAR_TYPE_NORMAL,
+} gProgressBarType = PROGRESSBAR_TYPE_NONE;
+
+// Progress bar scope of current operation
+static float gProgressScopeStart = 0, gProgressScopeSize = 0, gProgress = 0;
+static time_t gProgressScopeTime, gProgressScopeDuration;
+
+// Set to 1 when both graphics pages are the same (except for the progress bar)
+static int gPagesIdentical = 0;
+
+// Log text overlay, displayed when a magic key is pressed
+static char text[MAX_ROWS][MAX_COLS];
+static int text_cols = 0, text_rows = 0;
+static int text_col = 0, text_row = 0, text_top = 0;
+static int show_text = 0;
+
+static char menu[MAX_ROWS][MAX_COLS];
+static int show_menu = 0;
+static int menu_top = 0, menu_items = 0, menu_sel = 0;
+
+// Key event input queue
+static pthread_mutex_t key_queue_mutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t key_queue_cond = PTHREAD_COND_INITIALIZER;
+static int key_queue[256], key_queue_len = 0;
+static volatile char key_pressed[KEY_MAX + 1];
+
+// Clear the screen and draw the currently selected background icon (if any).
+// Should only be called with gUpdateMutex locked.
+static void draw_background_locked(gr_surface icon)
+{
+    gPagesIdentical = 0;
+    gr_color(0, 0, 0, 255);
+    gr_fill(0, 0, gr_fb_width(), gr_fb_height());
+
+    if (icon) {
+        int iconWidth = gr_get_width(icon);
+        int iconHeight = gr_get_height(icon);
+        int iconX = (gr_fb_width() - iconWidth) / 2;
+        int iconY = (gr_fb_height() - iconHeight) / 2;
+        gr_blit(icon, 0, 0, iconWidth, iconHeight, iconX, iconY);
+    }
+}
+
+// Draw the progress bar (if any) on the screen.  Does not flip pages.
+// Should only be called with gUpdateMutex locked.
+static void draw_progress_locked()
+{
+    if (gProgressBarType == PROGRESSBAR_TYPE_NONE) return;
+
+    int iconHeight = gr_get_height(gBackgroundIcon[BACKGROUND_ICON_INSTALLING]);
+    int width = gr_get_width(gProgressBarIndeterminate[0]);
+    int height = gr_get_height(gProgressBarIndeterminate[0]);
+
+    int dx = (gr_fb_width() - width)/2;
+    int dy = (3*gr_fb_height() + iconHeight - 2*height)/4;
+
+    // Erase behind the progress bar (in case this was a progress-only update)
+    gr_color(0, 0, 0, 255);
+    gr_fill(dx, dy, width, height);
+
+    if (gProgressBarType == PROGRESSBAR_TYPE_NORMAL) {
+        float progress = gProgressScopeStart + gProgress * gProgressScopeSize;
+        int pos = (int) (progress * width);
+
+        gr_surface s = (pos ? gProgressBarFill : gProgressBarEmpty)[LEFT_SIDE];
+        gr_blit(s, 0, 0, gr_get_width(s), gr_get_height(s), dx, dy);
+
+        int x = gr_get_width(s);
+        while (x + (int) gr_get_width(gProgressBarEmpty[RIGHT_SIDE]) < width) {
+            s = (pos > x ? gProgressBarFill : gProgressBarEmpty)[CENTER_TILE];
+            gr_blit(s, 0, 0, gr_get_width(s), gr_get_height(s), dx + x, dy);
+            x += gr_get_width(s);
+        }
+
+        s = (pos > x ? gProgressBarFill : gProgressBarEmpty)[RIGHT_SIDE];
+        gr_blit(s, 0, 0, gr_get_width(s), gr_get_height(s), dx + x, dy);
+    }
+
+    if (gProgressBarType == PROGRESSBAR_TYPE_INDETERMINATE) {
+        static int frame = 0;
+        gr_blit(gProgressBarIndeterminate[frame], 0, 0, width, height, dx, dy);
+        frame = (frame + 1) % PROGRESSBAR_INDETERMINATE_STATES;
+    }
+}
+
+static void draw_text_line(int row, const char* t) {
+  if (t[0] != '\0') {
+    gr_text(0, (row+1)*CHAR_HEIGHT-1, t);
+  }
+}
+
+// Redraw everything on the screen.  Does not flip pages.
+// Should only be called with gUpdateMutex locked.
+static void draw_screen_locked(void)
+{
+    draw_background_locked(gCurrentIcon);
+    draw_progress_locked();
+
+    if (show_text) {
+        gr_color(0, 0, 0, 160);
+        gr_fill(0, 0, gr_fb_width(), gr_fb_height());
+
+        int i = 0;
+        if (show_menu) {
+            gr_color(64, 96, 255, 255);
+            gr_fill(0, (menu_top+menu_sel) * CHAR_HEIGHT,
+                    gr_fb_width(), (menu_top+menu_sel+1)*CHAR_HEIGHT+1);
+
+            for (; i < menu_top + menu_items; ++i) {
+                if (i == menu_top + menu_sel) {
+                    gr_color(255, 255, 255, 255);
+                    draw_text_line(i, menu[i]);
+                    gr_color(64, 96, 255, 255);
+                } else {
+                    draw_text_line(i, menu[i]);
+                }
+            }
+            gr_fill(0, i*CHAR_HEIGHT+CHAR_HEIGHT/2-1,
+                    gr_fb_width(), i*CHAR_HEIGHT+CHAR_HEIGHT/2+1);
+            ++i;
+        }
+
+        gr_color(255, 255, 0, 255);
+
+        for (; i < text_rows; ++i) {
+            draw_text_line(i, text[(i+text_top) % text_rows]);
+        }
+    }
+}
+
+// Redraw everything on the screen and flip the screen (make it visible).
+// Should only be called with gUpdateMutex locked.
+static void update_screen_locked(void)
+{
+    draw_screen_locked();
+    gr_flip();
+}
+
+// Updates only the progress bar, if possible, otherwise redraws the screen.
+// Should only be called with gUpdateMutex locked.
+static void update_progress_locked(void)
+{
+    if (show_text || !gPagesIdentical) {
+        draw_screen_locked();    // Must redraw the whole screen
+        gPagesIdentical = 1;
+    } else {
+        draw_progress_locked();  // Draw only the progress bar
+    }
+    gr_flip();
+}
+
+// Keeps the progress bar updated, even when the process is otherwise busy.
+static void *progress_thread(void *cookie)
+{
+    for (;;) {
+        usleep(1000000 / PROGRESSBAR_INDETERMINATE_FPS);
+        pthread_mutex_lock(&gUpdateMutex);
+
+        // update the progress bar animation, if active
+        // skip this if we have a text overlay (too expensive to update)
+        if (gProgressBarType == PROGRESSBAR_TYPE_INDETERMINATE && !show_text) {
+            update_progress_locked();
+        }
+
+        // move the progress bar forward on timed intervals, if configured
+        int duration = gProgressScopeDuration;
+        if (gProgressBarType == PROGRESSBAR_TYPE_NORMAL && duration > 0) {
+            int elapsed = time(NULL) - gProgressScopeTime;
+            float progress = 1.0 * elapsed / duration;
+            if (progress > 1.0) progress = 1.0;
+            if (progress > gProgress) {
+                gProgress = progress;
+                update_progress_locked();
+            }
+        }
+
+        pthread_mutex_unlock(&gUpdateMutex);
+    }
+    return NULL;
+}
+
+// Reads input events, handles special hot keys, and adds to the key queue.
+static void *input_thread(void *cookie)
+{
+    int rel_sum = 0;
+    int fake_key = 0;
+    for (;;) {
+        // wait for the next key event
+        struct input_event ev;
+        do {
+            ev_get(&ev, 0);
+
+            if (ev.type == EV_SYN) {
+                continue;
+            } else if (ev.type == EV_REL) {
+                if (ev.code == REL_Y) {
+                    // accumulate the up or down motion reported by
+                    // the trackball.  When it exceeds a threshold
+                    // (positive or negative), fake an up/down
+                    // key event.
+                    rel_sum += ev.value;
+                    if (rel_sum > 3) {
+                        fake_key = 1;
+                        ev.type = EV_KEY;
+                        ev.code = KEY_DOWN;
+                        ev.value = 1;
+                        rel_sum = 0;
+                    } else if (rel_sum < -3) {
+                        fake_key = 1;
+                        ev.type = EV_KEY;
+                        ev.code = KEY_UP;
+                        ev.value = 1;
+                        rel_sum = 0;
+                    }
+                }
+            } else {
+                rel_sum = 0;
+            }
+        } while (ev.type != EV_KEY || ev.code > KEY_MAX);
+
+        pthread_mutex_lock(&key_queue_mutex);
+        if (!fake_key) {
+            // our "fake" keys only report a key-down event (no
+            // key-up), so don't record them in the key_pressed
+            // table.
+            key_pressed[ev.code] = ev.value;
+        }
+        fake_key = 0;
+        const int queue_max = sizeof(key_queue) / sizeof(key_queue[0]);
+        if (ev.value > 0 && key_queue_len < queue_max) {
+            key_queue[key_queue_len++] = ev.code;
+            pthread_cond_signal(&key_queue_cond);
+        }
+        pthread_mutex_unlock(&key_queue_mutex);
+
+        // Alt+L or Home+End: toggle log display
+        int alt = key_pressed[KEY_LEFTALT] || key_pressed[KEY_RIGHTALT];
+        if ((alt && ev.code == KEY_L && ev.value > 0) ||
+            (key_pressed[KEY_HOME] && ev.code == KEY_END && ev.value > 0)) {
+            pthread_mutex_lock(&gUpdateMutex);
+            show_text = !show_text;
+            update_screen_locked();
+            pthread_mutex_unlock(&gUpdateMutex);
+        }
+
+        // Green+Menu+Red: reboot immediately
+        if (ev.code == KEY_DREAM_RED &&
+            key_pressed[KEY_DREAM_MENU] &&
+            key_pressed[KEY_DREAM_GREEN]) {
+            reboot(RB_AUTOBOOT);
+        }
+    }
+    return NULL;
+}
+
+void ui_init(void)
+{
+    gr_init();
+    ev_init();
+
+    text_col = text_row = 0;
+    text_rows = gr_fb_height() / CHAR_HEIGHT;
+    if (text_rows > MAX_ROWS) text_rows = MAX_ROWS;
+    text_top = 1;
+
+    text_cols = gr_fb_width() / CHAR_WIDTH;
+    if (text_cols > MAX_COLS - 1) text_cols = MAX_COLS - 1;
+
+    int i;
+    for (i = 0; BITMAPS[i].name != NULL; ++i) {
+        int result = res_create_surface(BITMAPS[i].name, BITMAPS[i].surface);
+        if (result < 0) {
+            LOGE("Missing bitmap %s\n(Code %d)\n", BITMAPS[i].name, result);
+            *BITMAPS[i].surface = NULL;
+        }
+    }
+
+    pthread_t t;
+    pthread_create(&t, NULL, progress_thread, NULL);
+    pthread_create(&t, NULL, input_thread, NULL);
+}
+
+char *ui_copy_image(int icon, int *width, int *height, int *bpp) {
+    pthread_mutex_lock(&gUpdateMutex);
+    draw_background_locked(gBackgroundIcon[icon]);
+    *width = gr_fb_width();
+    *height = gr_fb_height();
+    *bpp = sizeof(gr_pixel) * 8;
+    int size = *width * *height * sizeof(gr_pixel);
+    char *ret = malloc(size);
+    if (ret == NULL) {
+        LOGE("Can't allocate %d bytes for image\n", size);
+    } else {
+        memcpy(ret, gr_fb_data(), size);
+    }
+    pthread_mutex_unlock(&gUpdateMutex);
+    return ret;
+}
+
+void ui_set_background(int icon)
+{
+    pthread_mutex_lock(&gUpdateMutex);
+    gCurrentIcon = gBackgroundIcon[icon];
+    update_screen_locked();
+    pthread_mutex_unlock(&gUpdateMutex);
+}
+
+void ui_show_indeterminate_progress()
+{
+    pthread_mutex_lock(&gUpdateMutex);
+    if (gProgressBarType != PROGRESSBAR_TYPE_INDETERMINATE) {
+        gProgressBarType = PROGRESSBAR_TYPE_INDETERMINATE;
+        update_progress_locked();
+    }
+    pthread_mutex_unlock(&gUpdateMutex);
+}
+
+void ui_show_progress(float portion, int seconds)
+{
+    pthread_mutex_lock(&gUpdateMutex);
+    gProgressBarType = PROGRESSBAR_TYPE_NORMAL;
+    gProgressScopeStart += gProgressScopeSize;
+    gProgressScopeSize = portion;
+    gProgressScopeTime = time(NULL);
+    gProgressScopeDuration = seconds;
+    gProgress = 0;
+    update_progress_locked();
+    pthread_mutex_unlock(&gUpdateMutex);
+}
+
+void ui_set_progress(float fraction)
+{
+    pthread_mutex_lock(&gUpdateMutex);
+    if (fraction < 0.0) fraction = 0.0;
+    if (fraction > 1.0) fraction = 1.0;
+    if (gProgressBarType == PROGRESSBAR_TYPE_NORMAL && fraction > gProgress) {
+        // Skip updates that aren't visibly different.
+        int width = gr_get_width(gProgressBarIndeterminate[0]);
+        float scale = width * gProgressScopeSize;
+        if ((int) (gProgress * scale) != (int) (fraction * scale)) {
+            gProgress = fraction;
+            update_progress_locked();
+        }
+    }
+    pthread_mutex_unlock(&gUpdateMutex);
+}
+
+void ui_reset_progress()
+{
+    pthread_mutex_lock(&gUpdateMutex);
+    gProgressBarType = PROGRESSBAR_TYPE_NONE;
+    gProgressScopeStart = gProgressScopeSize = 0;
+    gProgressScopeTime = gProgressScopeDuration = 0;
+    gProgress = 0;
+    update_screen_locked();
+    pthread_mutex_unlock(&gUpdateMutex);
+}
+
+void ui_print(const char *fmt, ...)
+{
+    char buf[256];
+    va_list ap;
+    va_start(ap, fmt);
+    vsnprintf(buf, 256, fmt, ap);
+    va_end(ap);
+
+    fputs(buf, stderr);
+
+    // This can get called before ui_init(), so be careful.
+    pthread_mutex_lock(&gUpdateMutex);
+    if (text_rows > 0 && text_cols > 0) {
+        char *ptr;
+        for (ptr = buf; *ptr != '\0'; ++ptr) {
+            if (*ptr == '\n' || text_col >= text_cols) {
+                text[text_row][text_col] = '\0';
+                text_col = 0;
+                text_row = (text_row + 1) % text_rows;
+                if (text_row == text_top) text_top = (text_top + 1) % text_rows;
+            }
+            if (*ptr != '\n') text[text_row][text_col++] = *ptr;
+        }
+        text[text_row][text_col] = '\0';
+        update_screen_locked();
+    }
+    pthread_mutex_unlock(&gUpdateMutex);
+}
+
+void ui_start_menu(char** headers, char** items) {
+    int i;
+    pthread_mutex_lock(&gUpdateMutex);
+    if (text_rows > 0 && text_cols > 0) {
+        for (i = 0; i < text_rows; ++i) {
+            if (headers[i] == NULL) break;
+            strncpy(menu[i], headers[i], text_cols-1);
+            menu[i][text_cols-1] = '\0';
+        }
+        menu_top = i;
+        for (; i < text_rows; ++i) {
+            if (items[i-menu_top] == NULL) break;
+            strncpy(menu[i], items[i-menu_top], text_cols-1);
+            menu[i][text_cols-1] = '\0';
+        }
+        menu_items = i - menu_top;
+        show_menu = 1;
+        menu_sel = 0;
+        update_screen_locked();
+    }
+    pthread_mutex_unlock(&gUpdateMutex);
+}
+
+int ui_menu_select(int sel) {
+    int old_sel;
+    pthread_mutex_lock(&gUpdateMutex);
+    if (show_menu > 0) {
+        old_sel = menu_sel;
+        menu_sel = sel;
+        if (menu_sel < 0) menu_sel = 0;
+        if (menu_sel >= menu_items) menu_sel = menu_items-1;
+        sel = menu_sel;
+        if (menu_sel != old_sel) update_screen_locked();
+    }
+    pthread_mutex_unlock(&gUpdateMutex);
+    return sel;
+}
+
+void ui_end_menu() {
+    int i;
+    pthread_mutex_lock(&gUpdateMutex);
+    if (show_menu > 0 && text_rows > 0 && text_cols > 0) {
+        show_menu = 0;
+        update_screen_locked();
+    }
+    pthread_mutex_unlock(&gUpdateMutex);
+}
+
+int ui_text_visible()
+{
+    pthread_mutex_lock(&gUpdateMutex);
+    int visible = show_text;
+    pthread_mutex_unlock(&gUpdateMutex);
+    return visible;
+}
+
+int ui_wait_key()
+{
+    pthread_mutex_lock(&key_queue_mutex);
+    while (key_queue_len == 0) {
+        pthread_cond_wait(&key_queue_cond, &key_queue_mutex);
+    }
+
+    int key = key_queue[0];
+    memcpy(&key_queue[0], &key_queue[1], sizeof(int) * --key_queue_len);
+    pthread_mutex_unlock(&key_queue_mutex);
+    return key;
+}
+
+int ui_key_pressed(int key)
+{
+    // This is a volatile static array, don't bother locking
+    return key_pressed[key];
+}
+
+void ui_clear_key_queue() {
+    pthread_mutex_lock(&key_queue_mutex);
+    key_queue_len = 0;
+    pthread_mutex_unlock(&key_queue_mutex);
+}