diff --git a/cmds/bootanimation/BootAnimation.cpp b/cmds/bootanimation/BootAnimation.cpp
index 2c7ee21..854982f 100644
--- a/cmds/bootanimation/BootAnimation.cpp
+++ b/cmds/bootanimation/BootAnimation.cpp
@@ -92,6 +92,8 @@
 static const char SYSTEM_TIME_DIR_PATH[] = "/data/system/time";
 static const char CLOCK_FONT_ASSET[] = "images/clock_font.png";
 static const char CLOCK_FONT_ZIP_NAME[] = "clock_font.png";
+static const char PROGRESS_FONT_ASSET[] = "images/progress_font.png";
+static const char PROGRESS_FONT_ZIP_NAME[] = "progress_font.png";
 static const char LAST_TIME_CHANGED_FILE_NAME[] = "last_time_change";
 static const char LAST_TIME_CHANGED_FILE_PATH[] = "/data/system/time/last_time_change";
 static const char ACCURATE_TIME_FLAG_FILE_NAME[] = "time_is_accurate";
@@ -107,6 +109,7 @@
 static const int TEXT_CENTER_VALUE = INT_MAX;
 static const int TEXT_MISSING_VALUE = INT_MIN;
 static const char EXIT_PROP_NAME[] = "service.bootanim.exit";
+static const char PROGRESS_PROP_NAME[] = "service.bootanim.progress";
 static const char DISPLAYS_PROP_NAME[] = "persist.service.bootanim.displays";
 static const int ANIM_ENTRY_NAME_MAX = ANIM_PATH_MAX + 1;
 static constexpr size_t TEXT_POS_LEN_MAX = 16;
@@ -891,6 +894,18 @@
     drawText(out, font, false, &x, &y);
 }
 
+void BootAnimation::drawProgress(int percent, const Font& font, const int xPos, const int yPos) {
+    static constexpr int PERCENT_LENGTH = 5;
+
+    char percentBuff[PERCENT_LENGTH];
+    // ';' has the ascii code just after ':', and the font resource contains '%'
+    // for that ascii code.
+    sprintf(percentBuff, "%d;", percent);
+    int x = xPos;
+    int y = yPos;
+    drawText(percentBuff, font, false, &x, &y);
+}
+
 bool BootAnimation::parseAnimationDesc(Animation& animation)  {
     String8 desString;
 
@@ -910,6 +925,7 @@
         int height = 0;
         int count = 0;
         int pause = 0;
+        int progress = 0;
         int framesToFadeCount = 0;
         char path[ANIM_ENTRY_NAME_MAX];
         char color[7] = "000000"; // default to black if unspecified
@@ -919,11 +935,17 @@
 
         int nextReadPos;
 
-        if (sscanf(l, "%d %d %d", &width, &height, &fps) == 3) {
-            // SLOGD("> w=%d, h=%d, fps=%d", width, height, fps);
+        int topLineNumbers = sscanf(l, "%d %d %d %d", &width, &height, &fps, &progress);
+        if (topLineNumbers == 3 || topLineNumbers == 4) {
+            // SLOGD("> w=%d, h=%d, fps=%d, progress=%d", width, height, fps, progress);
             animation.width = width;
             animation.height = height;
             animation.fps = fps;
+            if (topLineNumbers == 4) {
+              animation.progressEnabled = (progress != 0);
+            } else {
+              animation.progressEnabled = false;
+            }
         } else if (sscanf(l, "%c %d %d %" STRTO(ANIM_PATH_MAX) "s%n",
                           &pathType, &count, &pause, path, &nextReadPos) >= 4) {
             if (pathType == 'f') {
@@ -1000,6 +1022,14 @@
                 continue;
             }
 
+            if (entryName == PROGRESS_FONT_ZIP_NAME) {
+                FileMap* map = zip->createEntryFileMap(entry);
+                if (map) {
+                    animation.progressFont.map = map;
+                }
+                continue;
+            }
+
             for (size_t j = 0; j < pcount; j++) {
                 if (path == animation.parts[j].path) {
                     uint16_t method;
@@ -1131,6 +1161,8 @@
         mClockEnabled = clockFontInitialized;
     }
 
+    initFont(&mAnimation->progressFont, PROGRESS_FONT_ASSET);
+
     if (mClockEnabled && !updateIsTimeAccurate()) {
         mTimeCheckThread = new TimeCheckThread(this);
         mTimeCheckThread->run("BootAnimation::TimeCheckThread", PRIORITY_NORMAL);
@@ -1166,6 +1198,7 @@
             elapsedRealtime());
 
     int fadedFramesCount = 0;
+    int lastDisplayedProgress = 0;
     for (size_t i=0 ; i<pcount ; i++) {
         const Animation::Part& part(animation.parts[i]);
         const size_t fcount = part.frames.size();
@@ -1191,6 +1224,12 @@
                     part.backgroundColor[2],
                     1.0f);
 
+            // For the last animation, if we have progress indicator from
+            // the system, display it.
+            int currentProgress = android::base::GetIntProperty(PROGRESS_PROP_NAME, 0);
+            bool displayProgress = animation.progressEnabled &&
+                (i == (pcount -1)) && currentProgress != 0;
+
             for (size_t j=0 ; j<fcount ; j++) {
                 if (shouldStopPlayingPart(part, fadedFramesCount)) break;
 
@@ -1248,6 +1287,23 @@
                     drawClock(animation.clockFont, part.clockPosX, part.clockPosY);
                 }
 
+                if (displayProgress) {
+                    int newProgress = android::base::GetIntProperty(PROGRESS_PROP_NAME, 0);
+                    // In case the new progress jumped suddenly, still show an
+                    // increment of 1.
+                    if (lastDisplayedProgress != 100) {
+                      // Artificially sleep 1/10th a second to slow down the animation.
+                      usleep(100000);
+                      if (lastDisplayedProgress < newProgress) {
+                        lastDisplayedProgress++;
+                      }
+                    }
+                    // Put the progress percentage right below the animation.
+                    int posY = animation.height / 3;
+                    int posX = TEXT_CENTER_VALUE;
+                    drawProgress(lastDisplayedProgress, animation.progressFont, posX, posY);
+                }
+
                 handleViewport(frameDuration);
 
                 eglSwapBuffers(mDisplay, mSurface);
diff --git a/cmds/bootanimation/BootAnimation.h b/cmds/bootanimation/BootAnimation.h
index aee3853..b52222c 100644
--- a/cmds/bootanimation/BootAnimation.h
+++ b/cmds/bootanimation/BootAnimation.h
@@ -100,11 +100,13 @@
         int fps;
         int width;
         int height;
+        bool progressEnabled;
         Vector<Part> parts;
         String8 audioConf;
         String8 fileName;
         ZipFileRO* zip;
         Font clockFont;
+        Font progressFont;
     };
 
     // All callbacks will be called from this class's internal thread.
@@ -168,6 +170,7 @@
     bool movie();
     void drawText(const char* str, const Font& font, bool bold, int* x, int* y);
     void drawClock(const Font& font, const int xPos, const int yPos);
+    void drawProgress(int percent, const Font& font, const int xPos, const int yPos);
     void fadeFrame(int frameLeft, int frameBottom, int frameWidth, int frameHeight,
                    const Animation::Part& part, int fadedFramesCount);
     bool validClock(const Animation::Part& part);
diff --git a/cmds/bootanimation/FORMAT.md b/cmds/bootanimation/FORMAT.md
index f9b83c9..1678053 100644
--- a/cmds/bootanimation/FORMAT.md
+++ b/cmds/bootanimation/FORMAT.md
@@ -22,11 +22,14 @@
 
 The first line defines the general parameters of the animation:
 
-    WIDTH HEIGHT FPS
+    WIDTH HEIGHT FPS [PROGRESS]
 
   * **WIDTH:** animation width (pixels)
   * **HEIGHT:** animation height (pixels)
   * **FPS:** frames per second, e.g. 60
+  * **PROGRESS:** whether to show a progress percentage on the last part
+      + The percentage will be displayed with an x-coordinate of 'c', and a
+        y-coordinate set to 1/3 of the animation height.
 
 It is followed by a number of rows of the form:
 
@@ -77,6 +80,11 @@
   * Each row is divided in half: regular weight glyphs on the top half, bold glyphs on the bottom
   * For a NxM image each character glyph will be N/16 pixels wide and M/(12*2) pixels high
 
+## progress_font.png
+
+The file used to draw the boot progress in percentage on top of the boot animation. The font format
+follows the same specification as the one described for clock_font.png.
+
 ## loading and playing frames
 
 Each part is scanned and loaded directly from the zip archive. Within a part directory, every file