From 64f921eff7bcb6e0f7eb3bb292e11b777a06b846 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petar=20Kapri=C5=A1?= <kayprish@bonsai.cool>
Date: Mon, 13 Oct 2025 22:06:43 +0200
Subject: [PATCH] Fix blit_plane

This edit will make sure blit_plane only acts if all workers have
completed their drawing, since it's not much use otherwise.
---
 visor.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/visor.c b/visor.c
index ff036c7..d8dace6 100644
--- a/visor.c
+++ b/visor.c
@@ -342,8 +342,17 @@ void blit_plane(GtkDrawingArea *da, cairo_t *cr, int width, int height, gpointer
 	(void) width;
 	(void) height;
 	(void) data;
-	cairo_set_source_surface(cr, surface, 0, 0);
-	cairo_paint(cr);
+	bool allWritersHadCompleted = true;
+	for (int32_t i = 0; i < thread_count; i++) {
+		if (!threads[i].complete) {
+			allWritersHadCompleted = false;
+			break;
+		}
+	}
+	if (allWritersHadCompleted) {
+		cairo_set_source_surface(cr, surface, 0, 0);
+		cairo_paint(cr);
+	}
 }
 
 void plane_resize(GtkWidget *widget)