path: root/firmware/include
diff options
authorThomas Martitz <>2014-01-15 13:37:40 +0100
committerThomas Martitz <>2014-01-15 23:37:39 +0100
commitc23ce62829d98c2dc78f1fd8a8810cefd0f10402 (patch)
treec96a73b513350dabc3d33df2df376d86daa6cac9 /firmware/include
parent84c7d6133bf8a43688f1ac56d774fb94b1d3eed5 (diff)
fonts: Do not unload completely on USB.
The font engine can now perform cache lookups even if the font file is closed, if the font was disabled with the new font_disable_all() function. It is highly probable that the lookup succeeds but in the cache-miss case a blank, full-width glyph will be returned. Change-Id: I3c97e747d2a0ba30c7b495c6118c9f029d265b56
Diffstat (limited to 'firmware/include')
1 files changed, 9 insertions, 1 deletions
diff --git a/firmware/include/font_cache.h b/firmware/include/font_cache.h
index a4c959e336..1809720ed5 100644
--- a/firmware/include/font_cache.h
+++ b/firmware/include/font_cache.h
@@ -17,8 +17,10 @@
* KIND, either express or implied.
#ifndef _FONT_CACHE_H_
#define _FONT_CACHE_H_
+#include <stdbool.h>
#include "lru.h"
@@ -45,10 +47,16 @@ struct font_cache_entry
/* Create an auto sized font cache from buf */
void font_cache_create(
struct font_cache* fcache, void* buf, int buf_size, int bitmap_bytes_size);
-/* Get font cache entry */
+/* Get font cache entry for the given char_code
+ *
+ * cache_only: true if only a cache lookup should be performed and loading on miss should be avoided
+ *
+ * Note: With cache_only this can return NULL, which otherwise never happens */
struct font_cache_entry* font_cache_get(
struct font_cache* fcache,
unsigned short char_code,
+ bool cache_only,
void (*callback) (struct font_cache_entry* p, void *callback_data),
void *callback_data);