From e3a07c33099c9a3db1ef90ccc1d0c50fb3bdb0df Mon Sep 17 00:00:00 2001
From: Romain Vimont <rom@rom1v.com>
Date: Thu, 13 Sep 2018 22:24:26 +0200
Subject: [PATCH] update-on-event

---
 app/src/scrcpy.c | 1 +
 app/src/screen.c | 4 ++++
 app/src/screen.h | 4 ++++
 3 files changed, 9 insertions(+)

diff --git a/app/src/scrcpy.c b/app/src/scrcpy.c
index 54a7f993..2e2e911d 100644
--- a/app/src/scrcpy.c
+++ b/app/src/scrcpy.c
@@ -88,6 +88,7 @@ static SDL_bool event_loop(void) {
                 switch (event.window.event) {
                     case SDL_WINDOWEVENT_EXPOSED:
                     case SDL_WINDOWEVENT_SIZE_CHANGED:
+                        screen_update_scale(&screen);
                         screen_render(&screen);
                         break;
                 }
diff --git a/app/src/screen.c b/app/src/screen.c
index 1ae6c36e..1666a783 100644
--- a/app/src/screen.c
+++ b/app/src/screen.c
@@ -313,3 +313,7 @@ void screen_resize_to_pixel_perfect(struct screen *screen) {
         LOGD("Resized to pixel-perfect");
     }
 }
+
+void screen_update_scale(struct screen *screen) {
+    render_set_scaled_logical_size(screen, screen->frame_size);
+}
diff --git a/app/src/screen.h b/app/src/screen.h
index 13103eaa..67dcb295 100644
--- a/app/src/screen.h
+++ b/app/src/screen.h
@@ -66,4 +66,8 @@ void screen_resize_to_fit(struct screen *screen);
 // resize window to 1:1 (pixel-perfect)
 void screen_resize_to_pixel_perfect(struct screen *screen);
 
+// recompute the scale in case the window moved from/to another screen with a
+// different HiDPI
+void screen_update_scale(struct screen *screen);
+
 #endif