[PATCH] ui/sdl2: Allow high-dpi

[Antonio Caggiano]

Add the SDL_WINDOW_ALLOW_HIGHDPI flag when creating a window and get the
drawable size instead of the window size when setting up the framebuffer
and the viewport.

Signed-off-by: Antonio Caggiano <quic_acaggian@quicinc.com>
---
 ui/sdl2-gl.c | 4 ++--
 ui/sdl2.c    | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/ui/sdl2-gl.c b/ui/sdl2-gl.c
index bbfa70eac3..251b7d56d6 100644
--- a/ui/sdl2-gl.c
+++ b/ui/sdl2-gl.c
@@ -53,7 +53,7 @@ static void sdl2_gl_render_surface(struct sdl2_console *scon)
     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
     sdl2_set_scanout_mode(scon, false);
 
-    SDL_GetWindowSize(scon->real_window, &ww, &wh);
+    SDL_GL_GetDrawableSize(scon->real_window, &ww, &wh);
     surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh);
 
     surface_gl_render_texture(scon->gls, scon->surface);
@@ -239,7 +239,7 @@ void sdl2_gl_scanout_flush(DisplayChangeListener *dcl,
 
     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 
-    SDL_GetWindowSize(scon->real_window, &ww, &wh);
+    SDL_GL_GetDrawableSize(scon->real_window, &ww, &wh);
     egl_fb_setup_default(&scon->win_fb, ww, wh);
     egl_fb_blit(&scon->win_fb, &scon->guest_fb, !scon->y0_top);
 
diff --git a/ui/sdl2.c b/ui/sdl2.c
index 9d703200bf..c9c83815ca 100644
--- a/ui/sdl2.c
+++ b/ui/sdl2.c
@@ -95,7 +95,7 @@ void sdl2_window_create(struct sdl2_console *scon)
     }
 #ifdef CONFIG_OPENGL
     if (scon->opengl) {
-        flags |= SDL_WINDOW_OPENGL;
+        flags |= SDL_WINDOW_OPENGL | SDL_WINDOW_ALLOW_HIGHDPI;
     }
 #endif
 
-- 
2.40.0