terminal: add screen renderer

We don't want to expose the term_screen internals for rendering.
Therefore, provide an iterator that allows external renderers to draw
terminals.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/libsystemd-terminal/term.h b/src/libsystemd-terminal/term.h
index d5b934fc59..a3ca252e31 100644
--- a/src/libsystemd-terminal/term.h
+++ b/src/libsystemd-terminal/term.h
@@ -147,3 +147,15 @@ void term_screen_soft_reset(term_screen *screen);
 void term_screen_hard_reset(term_screen *screen);
 
 int term_screen_set_answerback(term_screen *screen, const char *answerback);
+
+int term_screen_draw(term_screen *screen,
+                     int (*draw_fn) (term_screen *screen,
+                                     void *userdata,
+                                     unsigned int x,
+                                     unsigned int y,
+                                     const term_attr *attr,
+                                     const uint32_t *ch,
+                                     size_t n_ch,
+                                     unsigned int ch_width),
+                     void *userdata,
+                     uint64_t *fb_age);