sdl, improve window resize handling

platform/common/menu_pico.c

@@ -156,6 +156,8 @@ static void copy_bg(int dir)
 
 static void menu_draw_prep(void)
 {
+	plat_video_menu_update();
+
 	if (menu_w == g_menuscreen_w && menu_h == g_menuscreen_h)
 		return;
 	menu_w = g_menuscreen_w, menu_h = g_menuscreen_h;

platform/common/plat_sdl.c

@@ -285,6 +285,19 @@ void plat_video_clear_buffers(void)
 	}
 }
 
+void plat_video_menu_update(void)
+{
+	// w/h might have changed due to resizing
+	plat_sdl_change_video_mode(g_menuscreen_w, g_menuscreen_h, 1);
+	resize_buffers();
+
+	// update pitch as it is needed by the menu bg scaler
+	if (plat_sdl_overlay || plat_sdl_gl_active)
+		g_menuscreen_pp = g_menuscreen_w;
+	else
+		g_menuscreen_pp = plat_sdl_screen->pitch / 2;
+}
+
 void plat_video_menu_enter(int is_rom_loaded)
 {
 	if (SDL_MUSTLOCK(plat_sdl_screen))
@@ -293,16 +306,13 @@ void plat_video_menu_enter(int is_rom_loaded)
 
 void plat_video_menu_begin(void)
 {
-	plat_sdl_change_video_mode(g_menuscreen_w, g_menuscreen_h, 1);
-	resize_buffers();
-	if (plat_sdl_overlay || plat_sdl_gl_active) {
-		g_menuscreen_pp = g_menuscreen_w;
+	plat_video_menu_update(); // just in case
+
+	if (plat_sdl_overlay || plat_sdl_gl_active)
 		g_menuscreen_ptr = shadow_fb;
-	}
 	else {
 		if (SDL_MUSTLOCK(plat_sdl_screen))
 			SDL_LockSurface(plat_sdl_screen);
-		g_menuscreen_pp = plat_sdl_screen->pitch / 2;
 		g_menuscreen_ptr = plat_sdl_screen->pixels;
 	}
 }

platform/gp2x/plat.c

@@ -147,6 +147,11 @@ void gp2x_make_fb_bufferable(int yes)
 }
 
 /* common */
+void plat_video_menu_update(void)
+{
+	// surface is always the screen
+}
+
 void plat_video_menu_enter(int is_rom_loaded)
 {
 	if (gp2x_current_bpp != 16 || gp2x_dev_id == GP2X_DEV_WIZ) {

platform/linux/emu.c

@@ -341,6 +341,10 @@ void pemu_forced_frame(int no_scale, int do_emu)
 
 	g_menubg_src_ptr = realloc(g_menubg_src_ptr, g_screen_height * g_screen_ppitch * 2);
 	memcpy(g_menubg_src_ptr, g_screen_ptr, g_screen_height * g_screen_ppitch * 2);
+	g_menubg_src_w = g_screen_width;
+	g_menubg_src_h = g_screen_height;
+	g_menubg_src_pp = g_screen_ppitch;
+
 	currentConfig.scaling = hs, currentConfig.vscaling = vs;
 }
 
@@ -480,9 +484,6 @@ void pemu_loop_end(void)
 	/* do one more frame for menu bg */
 	plat_video_set_shadow(320, 240);
 	pemu_forced_frame(0, 1);
-	g_menubg_src_w = g_screen_width;
-	g_menubg_src_h = g_screen_height;
-	g_menubg_src_pp = g_screen_ppitch;
 	if (ghost_buf) {
 		free(ghost_buf);
 		ghost_buf = NULL;

platform/pandora/plat.c

@@ -199,6 +199,10 @@ void plat_video_toggle_renderer(int change, int is_menu)
 		PicoDrawSetOutFormat(PDF_RGB555, 0);
 }
 
+void plat_video_menu_update(void)
+{
+}
+
 void plat_video_menu_enter(int is_rom_loaded)
 {
 }

platform/ps2/emu.c

@@ -868,6 +868,12 @@ void plat_video_wait_vsync(void)
 	gsKit_sync(gsGlobal);
 }
 
+/* update surface data */
+void plat_video_menu_update(void)
+{
+	// surface is always the screen
+}
+
 /* switch from emulation display to menu display */
 void plat_video_menu_enter(int is_rom_loaded)
 {

platform/psp/plat.c

@@ -98,6 +98,12 @@ void plat_video_wait_vsync(void)
 	sceDisplayWaitVblankStart();
 }
 
+/* update surface data */
+void plat_video_menu_update(void)
+{
+	// surface is always the screen
+}
+
 /* switch from emulation display to menu display */
 void plat_video_menu_enter(int is_rom_loaded)
 {