From 94f4b1f36149e6cabbbfa6e9a82ca2df2505eb39 Mon Sep 17 00:00:00 2001
From: Timo Korvola <tkorvola@iki.fi>
Date: Mon, 2 Apr 2018 11:52:16 +0300
Subject: [PATCH] Fix expose handling.

It is not enough to just call SDL_RenderPresent.  The frame must be
rendered first, i.e., copied from texture.  This fixes fullscreen
toggling as well.
---
 src/sdl/sf_video.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/sdl/sf_video.c b/src/sdl/sf_video.c
index a4e6d14..3980da1 100644
--- a/src/sdl/sf_video.c
+++ b/src/sdl/sf_video.c
@@ -51,7 +51,6 @@ static int mywcslen( zchar *b)
   }
 
 static void myGrefresh() {
-    SDL_UpdateTexture(texture, NULL, sbuffer, sbpitch * sizeof(ulong));
     SDL_RenderClear(renderer);
     SDL_RenderCopy(renderer, texture, NULL, NULL);
     SDL_RenderPresent(renderer);
@@ -349,6 +348,7 @@ static void scroll( int x, int y, int w, int h, int n)
  */
 bool sf_flushdisplay() {
     if (dirty) {
+        SDL_UpdateTexture(texture, NULL, sbuffer, sbpitch * sizeof(ulong));
         myGrefresh();
         dirty = 0;
         return true;
@@ -597,7 +597,7 @@ static void handle_window_event(SDL_Event *e)
 {
     switch (e->window.event) {
     case SDL_WINDOWEVENT_EXPOSED:
-        SDL_RenderPresent(renderer);
+        myGrefresh();
     }
 }
 
-- 
2.34.1