// read all the data structures
const size_t pcount = animation.parts.size();
void *cookie = NULL;
- ZipFileRO* mZip = animation.zip;
- if (!mZip->startIteration(&cookie)) {
+ ZipFileRO* zip = animation.zip;
+ if (!zip->startIteration(&cookie)) {
return false;
}
ZipEntryRO entry;
char name[ANIM_ENTRY_NAME_MAX];
- while ((entry = mZip->nextEntry(cookie)) != NULL) {
- const int foundEntryName = mZip->getEntryFileName(entry, name, ANIM_ENTRY_NAME_MAX);
+ while ((entry = zip->nextEntry(cookie)) != NULL) {
+ const int foundEntryName = zip->getEntryFileName(entry, name, ANIM_ENTRY_NAME_MAX);
if (foundEntryName > ANIM_ENTRY_NAME_MAX || foundEntryName == -1) {
ALOGE("Error fetching entry file name");
continue;
const String8 path(entryName.getPathDir());
const String8 leaf(entryName.getPathLeaf());
if (leaf.size() > 0) {
- for (size_t j=0 ; j<pcount ; j++) {
+ for (size_t j = 0; j < pcount; j++) {
if (path == animation.parts[j].path) {
uint16_t method;
// supports only stored png files
- if (mZip->getEntryInfo(entry, &method, NULL, NULL, NULL, NULL, NULL)) {
+ if (zip->getEntryInfo(entry, &method, NULL, NULL, NULL, NULL, NULL)) {
if (method == ZipFileRO::kCompressStored) {
- FileMap* map = mZip->createEntryFileMap(entry);
+ FileMap* map = zip->createEntryFileMap(entry);
if (map) {
Animation::Part& part(animation.parts.editItemAt(j));
if (leaf == "audio.wav") {
// a part may have at most one audio file
part.audioFile = map;
+ } else if (leaf == "trim.txt") {
+ part.trimData.setTo((char const*)map->getDataPtr(),
+ map->getDataLength());
} else {
Animation::Frame frame;
frame.name = leaf;
frame.map = map;
+ frame.trimWidth = animation.width;
+ frame.trimHeight = animation.height;
+ frame.trimX = 0;
+ frame.trimY = 0;
part.frames.add(frame);
}
}
}
}
- mZip->endIteration(cookie);
+ // If there is trimData present, override the positioning defaults.
+ for (Animation::Part& part : animation.parts) {
+ const char* trimDataStr = part.trimData.string();
+ for (size_t frameIdx = 0; frameIdx < part.frames.size(); frameIdx++) {
+ const char* endl = strstr(trimDataStr, "\n");
+ // No more trimData for this part.
+ if (endl == NULL) {
+ break;
+ }
+ String8 line(trimDataStr, endl - trimDataStr);
+ const char* lineStr = line.string();
+ trimDataStr = ++endl;
+ int width = 0, height = 0, x = 0, y = 0;
+ if (sscanf(lineStr, "%dx%d+%d+%d", &width, &height, &x, &y) == 4) {
+ Animation::Frame& frame(part.frames.editItemAt(frameIdx));
+ frame.trimWidth = width;
+ frame.trimHeight = height;
+ frame.trimX = x;
+ frame.trimY = y;
+ } else {
+ ALOGE("Error parsing trim.txt, line: %s", lineStr);
+ break;
+ }
+ }
+ }
+
+ zip->endIteration(cookie);
return true;
}
bool BootAnimation::playAnimation(const Animation& animation)
{
const size_t pcount = animation.parts.size();
- const int xc = (mWidth - animation.width) / 2;
- const int yc = ((mHeight - animation.height) / 2);
nsecs_t frameDuration = s2ns(1) / animation.fps;
-
- Region clearReg(Rect(mWidth, mHeight));
- clearReg.subtractSelf(Rect(xc, yc, xc+animation.width, yc+animation.height));
+ const int animationX = (mWidth - animation.width) / 2;
+ const int animationY = (mHeight - animation.height) / 2;
for (size_t i=0 ; i<pcount ; i++) {
const Animation::Part& part(animation.parts[i]);
initTexture(frame);
}
+ const int xc = animationX + frame.trimX;
+ const int yc = animationY + frame.trimY;
+ Region clearReg(Rect(mWidth, mHeight));
+ clearReg.subtractSelf(Rect(xc, yc, xc+frame.trimWidth, yc+frame.trimHeight));
if (!clearReg.isEmpty()) {
Region::const_iterator head(clearReg.begin());
Region::const_iterator tail(clearReg.end());
glEnable(GL_SCISSOR_TEST);
while (head != tail) {
const Rect& r2(*head++);
- glScissor(r2.left, mHeight - r2.bottom,
- r2.width(), r2.height());
+ glScissor(r2.left, mHeight - r2.bottom, r2.width(), r2.height());
glClear(GL_COLOR_BUFFER_BIT);
}
glDisable(GL_SCISSOR_TEST);
}
- // specify the y center as ceiling((mHeight - animation.height) / 2)
- // which is equivalent to mHeight - (yc + animation.height)
- glDrawTexiOES(xc, mHeight - (yc + animation.height),
- 0, animation.width, animation.height);
+ // specify the y center as ceiling((mHeight - frame.trimHeight) / 2)
+ // which is equivalent to mHeight - (yc + frame.trimHeight)
+ glDrawTexiOES(xc, mHeight - (yc + frame.trimHeight),
+ 0, frame.trimWidth, frame.trimHeight);
if (mClockEnabled && mTimeIsAccurate && part.clockPosY >= 0) {
drawTime(mClock, part.clockPosY);
}
--- /dev/null
+# bootanimation format
+
+## zipfile paths
+
+The system selects a boot animation zipfile from the following locations, in order:
+
+ /system/media/bootanimation-encrypted.zip (if getprop("vold.decrypt") = '1')
+ /system/media/bootanimation.zip
+ /oem/media/bootanimation.zip
+
+## zipfile layout
+
+The `bootanimation.zip` archive file includes:
+
+ desc.txt - a text file
+ part0 \
+ part1 \ directories full of PNG frames
+ ... /
+ partN /
+
+## desc.txt format
+
+The first line defines the general parameters of the animation:
+
+ WIDTH HEIGHT FPS
+
+ * **WIDTH:** animation width (pixels)
+ * **HEIGHT:** animation height (pixels)
+ * **FPS:** frames per second, e.g. 60
+
+It is followed by a number of rows of the form:
+
+ TYPE COUNT PAUSE PATH [#RGBHEX CLOCK]
+
+ * **TYPE:** a single char indicating what type of animation segment this is:
+ + `p` -- this part will play unless interrupted by the end of the boot
+ + `c` -- this part will play to completion, no matter what
+ * **COUNT:** how many times to play the animation, or 0 to loop forever until boot is complete
+ * **PAUSE:** number of FRAMES to delay after this part ends
+ * **PATH:** directory in which to find the frames for this part (e.g. `part0`)
+ * **RGBHEX:** _(OPTIONAL)_ a background color, specified as `#RRGGBB`
+ * **CLOCK:** _(OPTIONAL)_ the y-coordinate at which to draw the current time (for watches)
+
+There is also a special TYPE, `$SYSTEM`, that loads `/system/media/bootanimation.zip`
+and plays that.
+
+## loading and playing frames
+
+Each part is scanned and loaded directly from the zip archive. Within a part directory, every file
+(except `trim.txt` and `audio.wav`; see next sections) is expected to be a PNG file that represents
+one frame in that part (at the specified resolution). For this reason it is important that frames be
+named sequentially (e.g. `part000.png`, `part001.png`, ...) and added to the zip archive in that
+order.
+
+## trim.txt
+
+To save on memory, textures may be trimmed by their background color. trim.txt sequentially lists
+the trim output for each frame in its directory, so the frames may be properly positioned.
+Output should be of the form: `WxH+X+Y`. Example:
+
+ 713x165+388+914
+ 708x152+388+912
+ 707x139+388+911
+ 649x92+388+910
+
+If the file is not present, each frame is assumed to be the same size as the animation.
+
+## audio.wav
+
+Each part may optionally play a `wav` sample when it starts. To enable this for an animation,
+you must also include a `audio_conf.txt` file in the ZIP archive. Its format is as follows:
+
+ card=<ALSA card number>
+ device=<ALSA device number>
+ period_size=<period size>
+ period_count=<period count>
+
+This header is followed by zero or more mixer settings, each with the format:
+
+ mixer "<name>" = <value list>
+
+Here's an example `audio_conf.txt` from Shamu:
+
+ card=0
+ device=15
+ period_size=1024
+ period_count=4
+
+ mixer "QUAT_MI2S_RX Audio Mixer MultiMedia5" = 1
+ mixer "Playback Channel Map" = 0 220 157 195 0 0 0 0
+ mixer "QUAT_MI2S_RX Channels" = Two
+ mixer "BOOST_STUB Right Mixer right" = 1
+ mixer "BOOST_STUB Left Mixer left" = 1
+ mixer "Compress Playback 9 Volume" = 80 80
+
+You will probably need to get these mixer names and values out of `audio_platform_info.xml`
+and `mixer_paths.xml` for your device.
+
+## exiting
+
+The system will end the boot animation (first completing any incomplete or even entirely unplayed
+parts that are of type `c`) when the system is finished booting. (This is accomplished by setting
+the system property `service.bootanim.exit` to a nonzero string.)
+
+## protips
+
+### PNG compression
+
+Use `zopflipng` if you have it, otherwise `pngcrush` will do. e.g.:
+
+ for fn in *.png ; do
+ zopflipng -m ${fn}s ${fn}s.new && mv -f ${fn}s.new ${fn}
+ # or: pngcrush -q ....
+ done
+
+Some animations benefit from being reduced to 256 colors:
+
+ pngquant --force --ext .png *.png
+ # alternatively: mogrify -colors 256 anim-tmp/*/*.png
+
+### creating the ZIP archive
+
+ cd <path-to-pieces>
+ zip -0qry -i \*.txt \*.png \*.wav @ ../bootanimation.zip *.txt part*
+
+Note that the ZIP archive is not actually compressed! The PNG files are already as compressed
+as they can reasonably get, and there is unlikely to be any redundancy between files.
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