From 9cb737b77d9cc43a9bed305cbb105928a3dda54b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>
Date: Wed, 30 Aug 2023 13:38:14 +0400
Subject: [PATCH] ui/vc: skip text console resize when possible
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This function is called on invalidate, on each cursor blink.
Avoid the extra copy when the console size didn't change.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230830093843.3531473-41-marcandre.lureau@redhat.com>
---
ui/console.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/ui/console.c b/ui/console.c
index 0a48ce9159..4ee3b77568 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -413,13 +413,19 @@ static void text_console_resize(QemuTextConsole *t)
{
QemuConsole *s = QEMU_CONSOLE(t);
TextCell *cells, *c, *c1;
- int w1, x, y, last_width;
+ int w1, x, y, last_width, w, h;
assert(s->scanout.kind == SCANOUT_SURFACE);
+ w = surface_width(s->surface) / FONT_WIDTH;
+ h = surface_height(s->surface) / FONT_HEIGHT;
+ if (w == t->width && h == t->height) {
+ return;
+ }
+
last_width = t->width;
- t->width = surface_width(s->surface) / FONT_WIDTH;
- t->height = surface_height(s->surface) / FONT_HEIGHT;
+ t->width = w;
+ t->height = h;
w1 = last_width;
if (t->width < w1)