Resizing windows in 1.2 should not trigger some init code :)

gfx/gl.c

@@ -784,7 +784,7 @@ static bool gl_frame(void *data, const void* frame, unsigned width, unsigned hei
    {
       gl->should_resize = false;
 
-      sdlwrap_set_video_mode(gl->win_width, gl->win_height, 0, g_settings.video.fullscreen);
+      sdlwrap_set_resize(gl->win_width, gl->win_height);
 
 #ifdef HAVE_FBO
       if (!gl->render_to_tex)

gfx/sdlwrap.c

@@ -170,6 +170,25 @@ bool sdlwrap_set_video_mode(
    return true;
 }
 
+// SDL 1.2 has an awkward model where you need to "confirm" window resizing.
+// SDL 1.3 luckily removes this quirk.
+void sdlwrap_set_resize(unsigned width, unsigned height)
+{
+#if SDL_MODERN
+   (void)width;
+   (void)height;
+   (void)bits;
+   (void)fullscreen;
+#else
+#ifndef __APPLE__ // Resizing on OSX is broken in 1.2 it seems :)
+   static const int resizable = SDL_RESIZABLE;
+#else
+   static const int resizable = 0;
+#endif
+   SDL_SetVideoMode(width, height, 0, SDL_OPENGL | (g_fullscreen ? SDL_FULLSCREEN : resizable));
+#endif
+}
+
 void sdlwrap_wm_set_caption(const char *str)
 {
 #if SDL_MODERN

gfx/sdlwrap.h

@@ -58,6 +58,8 @@ bool sdlwrap_key_pressed(int key);
 void sdlwrap_check_window(bool *quit,
       bool *resize, unsigned *width, unsigned *height, unsigned frame_count);
 
+void sdlwrap_set_resize(unsigned width, unsigned height);
+
 bool sdlwrap_get_wm_info(SDL_SysWMinfo *info);
 
 bool sdlwrap_window_has_focus(void);