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render: scroll: move comment to where it belongs

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Daniel Eklöf 2020-03-23 20:15:04 +01:00
parent 9166be8aed
commit 7958f8b5ef
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1 changed files with 10 additions and 12 deletions
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22
render.c
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@ -599,18 +599,6 @@ grid_render_scroll(struct terminal *term, struct buffer *buf,
did_shm_scroll = shm_scroll( did_shm_scroll = shm_scroll(
term->wl->shm, buf, dmg->scroll.lines * term->cell_height); term->wl->shm, buf, dmg->scroll.lines * term->cell_height);
/*
* When SHM scrolling succeeded, the scrolled in area is made
* up of newly allocated, zero-initialized memory. Thus we'll
* need to both copy the bottom scrolling region, and
* re-render the window margins.
*
* This is different from when we scroll with a simple
* memmove, since in that case, the scrolling region and
* margins are *copied*, and thus the original region+margin
* remains in place.
*/
if (!did_shm_scroll) if (!did_shm_scroll)
LOG_DBG("fast scroll failed"); LOG_DBG("fast scroll failed");
} else { } else {
@ -620,6 +608,16 @@ grid_render_scroll(struct terminal *term, struct buffer *buf,
dmb->scroll.region.start, scroll_region_lines, term->rows); dmb->scroll.region.start, scroll_region_lines, term->rows);
} }
/*
* When SHM scrolling succeeded, the scrolled in area is made up
* of newly allocated, zero-initialized memory. Thus we'll need to
* both copy the bottom scrolling region, and re-render the window
* margins.
*
* This is different from when we scroll with a simple memmove,
* since in that case, the scrolling region and margins are
* *copied*, and thus the original region+margin remains in place.
*/
if (did_shm_scroll) { if (did_shm_scroll) {
/* Restore bottom scrolling region */ /* Restore bottom scrolling region */