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vbox: only clear screen if virtual_fb_mode changed

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Fixes genodelabs/genode#4085
This commit is contained in:
Johannes Schlatow
2021-04-22 19:07:46 +02:00
committed by Norman Feske
parent a47fd36b9f
commit 8a4b52d9e3
1 changed files with 7 additions and 4 deletions
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11
repos/ports/src/virtualbox5/frontend/fb.h
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@@ -145,10 +145,13 @@ class Genodefb :
/* save the new bitmap reference */
_display->QuerySourceBitmap(screen, _display_bitmap.asOutParam());
bool ok = (w <= (ULONG)_fb_mode.area.w()) &&
(h <= (ULONG)_fb_mode.area.h());
bool const ok = (w <= (ULONG)_fb_mode.area.w()) &&
(h <= (ULONG)_fb_mode.area.h());
if (ok) {
bool const changed = (w != (ULONG)_virtual_fb_mode.area.w()) ||
(h != (ULONG)_virtual_fb_mode.area.h());
if (ok && changed) {
Genode::log("fb resize : [", screen, "] ",
_virtual_fb_mode.area, " -> ",
w, "x", h,
@@ -163,7 +166,7 @@ class Genodefb :
_virtual_fb_mode = Fb_Genode::Mode { .area = { w, h } };
result = S_OK;
} else {
} else if (changed) {
Genode::log("fb resize : [", screen, "] ",
_virtual_fb_mode.area, " -> ",
w, "x", h, " ignored"