BufferMapper* DisplayPlane::mapBuffer(DataBuffer *buffer)
{
BufferManager *bm = Hwcomposer::getInstance().getBufferManager();
// invalidate buffer cache if cache is full
if ((int)mDataBuffers.size() >= mCacheCapacity) {
invalidateBufferCache();
}
BufferMapper *mapper = bm->map(*buffer);
if (!mapper) {
ELOGTRACE("failed to map buffer");
return NULL;
}
// add it to data buffers
ssize_t index = mDataBuffers.add(buffer->getKey(), mapper);
if (index < 0) {
ELOGTRACE("failed to add mapper");
bm->unmap(mapper);
return NULL;
}
return mapper;
}
void DisplayPlane::invalidateBufferCache()
{
BufferManager *bm = Hwcomposer::getInstance().getBufferManager();
BufferMapper* mapper;
RETURN_VOID_IF_NOT_INIT();
for (size_t i = 0; i < mDataBuffers.size(); i++) {
mapper = mDataBuffers.valueAt(i);
bm->unmap(mapper);
}
mDataBuffers.clear();
// reset current buffer
mCurrentDataBuffer = 0;
}
void DisplayPlane::updateActiveBuffers(BufferMapper *mapper)
{
BufferManager *bm = Hwcomposer::getInstance().getBufferManager();
// unmap the first entry (oldest buffer)
if (mActiveBuffers.size() >= MIN_DATA_BUFFER_COUNT) {
BufferMapper *oldest = mActiveBuffers.itemAt(0);
bm->unmap(oldest);
mActiveBuffers.removeAt(0);
}
// queue it to active buffers
if (!isActiveBuffer(mapper)) {
mapper->incRef();
mActiveBuffers.push_back(mapper);
}
}
void DisplayPlane::invalidateActiveBuffers()
{
BufferManager *bm = Hwcomposer::getInstance().getBufferManager();
BufferMapper* mapper;
RETURN_VOID_IF_NOT_INIT();
VLOGTRACE("invalidating active buffers");
for (size_t i = 0; i < mActiveBuffers.size(); i++) {
mapper = mActiveBuffers.itemAt(i);
// unmap it
bm->unmap(mapper);
}
// clear recorded data buffers
mActiveBuffers.clear();
}
