osd: add rolling refresh for hd systems

BossHobby · Jan 12, 2025 · 263fc54 · 263fc54
1 parent d62b68b
commit 263fc54
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Showing 3 changed files with 15 additions and 0 deletions.
diff --git a/src/driver/osd/osd.c b/src/driver/osd/osd.c
@@ -79,6 +79,18 @@ void osd_clear() {
     ;
 }
 
+void osd_mark_row_dirty() {
+  static uint8_t row = 0;
+
+  const uint16_t offset = row * cols;
+  for (uint32_t i = 0; i < cols; i++) {
+    display[offset + i].dirty = display[offset + i].val != ' ';
+  }
+  display_dirty = display_row_dirty[row] = true;
+
+  row = (row + 1) % rows;
+}
+
 uint8_t osd_clear_async() {
   static uint8_t state = 0;
 

diff --git a/src/driver/osd/osd.h b/src/driver/osd/osd.h
@@ -60,6 +60,7 @@ bool osd_is_ready();
 bool osd_update();
 
 void osd_clear();
+void osd_mark_row_dirty();
 uint8_t osd_clear_async();
 
 void osd_display_refresh();

diff --git a/src/osd/render.c b/src/osd/render.c
@@ -531,6 +531,8 @@ static void osd_display_regular() {
       // display warning if we can not detect a camera
       osd_start(OSD_ATTR_BLINK, 7, 7);
       osd_write_str("NO CAMERA SIGNAL");
+    } else if (osd_system == OSD_SYS_HD) {
+      osd_mark_row_dirty();
     }
     osd_state.element = 0;
     break;