diff options
Diffstat (limited to 'src/entry.c')
| -rw-r--r-- | src/entry.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/src/entry.c b/src/entry.c index 0348d06..453f3c5 100644 --- a/src/entry.c +++ b/src/entry.c @@ -120,18 +120,19 @@ void entry_init(struct entry *entry, uint8_t *restrict buffer, uint32_t width, u * Cairo context, we can copy over just the important state (the * transformation matrix and clip rectangle) and perform a memcpy() * to initialise the other context. + * + * This memcpy can pretty expensive however, and isn't needed until + * we need to draw our second buffer (i.e. when the user presses a + * key). In order to minimise startup time, the memcpy() isn't + * performed here, but instead happens later, just after the first + * frame has been displayed on screen (and while the user is unlikely + * to press another key for the <10ms it takes to memcpy). */ cairo_matrix_t mat; cairo_get_matrix(cr, &mat); cairo_set_matrix(entry->cairo[1].cr, &mat); cairo_rectangle(entry->cairo[1].cr, 0, 0, width, height); cairo_clip(entry->cairo[1].cr); - - memcpy( - cairo_image_surface_get_data(entry->cairo[1].surface), - cairo_image_surface_get_data(entry->cairo[0].surface), - entry->image.width * entry->image.height * sizeof(uint32_t) - ); } void entry_destroy(struct entry *entry) |