diff options
| -rw-r--r-- | firmware/font.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/firmware/font.c b/firmware/font.c index 2be9035..e6f90e4 100644 --- a/firmware/font.c +++ b/firmware/font.c @@ -93,8 +93,10 @@ static int buflibmove_callback(int handle, void* current, void* new) if (alloc->handle_locked) return BUFLIB_CB_CANNOT_MOVE; - alloc->font.bits += diff; - alloc->font.offset += diff; + if (alloc->font.bits) + alloc->font.bits += diff; + if (alloc->font.offset) + alloc->font.offset += diff; if (alloc->font.width) alloc->font.width += diff; @@ -102,8 +104,10 @@ static int buflibmove_callback(int handle, void* current, void* new) alloc->font.buffer_end += diff; alloc->font.buffer_position += diff; - alloc->font.cache._index += diff; - alloc->font.cache._lru._base += diff; + if (alloc->font.cache._index) + alloc->font.cache._index += diff; + if (alloc->font.cache._lru._base) + alloc->font.cache._lru._base += diff; return BUFLIB_CB_OK; } |