Fix T51889: new file or load factory settings results in broken UI.

Fix some cases that still assumed there to be a global DPI, instead of a per
window DPI that needs to be set before reading U.dpi.

source/blender/blenfont/BLF_api.h

@@ -38,7 +38,7 @@ struct rctf;
 struct ColorManagedDisplay;
 struct ResultBLF;
 
-int BLF_init(int points, int dpi);
+int BLF_init(void);
 void BLF_exit(void);
 void BLF_default_dpi(int dpi);
 void BLF_default_set(int fontid);

source/blender/blenfont/intern/blf.c

@@ -96,15 +96,16 @@ static FontBLF *blf_get(int fontid)
 	return NULL;
 }
 
-int BLF_init(int points, int dpi)
+int BLF_init(void)
 {
 	int i;
 
 	for (i = 0; i < BLF_MAX_FONT; i++)
 		global_font[i] = NULL;
 
-	global_font_points = points;
-	global_font_dpi = dpi;
+	global_font_points = 11;
+	global_font_dpi = 72;
+
 	return blf_font_init();
 }
 

source/blender/blenkernel/BKE_blender.h

@@ -50,7 +50,6 @@ void BKE_blender_version_string(
 
 void BKE_blender_userdef_set_data(struct UserDef *userdef);
 void BKE_blender_userdef_free_data(struct UserDef *userdef);
-void BKE_blender_userdef_refresh(void);
 
 void BKE_blender_userdef_set_app_template(struct UserDef *userdef);
 

source/blender/blenkernel/intern/blender.c

@@ -225,19 +225,6 @@ void BKE_blender_userdef_free_data(UserDef *userdef)
 #undef U
 }
 
-/**
- * Handle changes in settings that need refreshing.
- */
-void BKE_blender_userdef_refresh(void)
-{
-	/* prevent accidents */
-	if (U.pixelsize == 0) U.pixelsize = 1;
-	
-	BLF_default_dpi(U.pixelsize * U.dpi);
-	U.widget_unit = (U.pixelsize * U.dpi * 20 + 36) / 72;
-
-}
-
 /**
  * Write U from userdef.
  * This function defines which settings a template will override for the user preferences.

source/blender/editors/screen/screen_edit.c

@@ -1228,6 +1228,7 @@ void ED_screen_refresh(wmWindowManager *wm, wmWindow *win)
 		winrct.ymax = winsize_y - 1;
 		
 		/* header size depends on DPI, let's verify */
+		WM_window_set_dpi(win);
 		screen_refresh_headersizes();
 		
 		screen_test_scale(win->screen, winsize_x, winsize_y);

source/blender/windowmanager/WM_api.h

@@ -103,6 +103,7 @@ enum {
 
 struct wmWindow	*WM_window_open(struct bContext *C, const struct rcti *rect);
 struct wmWindow *WM_window_open_temp(struct bContext *C, int x, int y, int sizex, int sizey, int type);
+void             WM_window_set_dpi(wmWindow *win);
 			
 			/* returns true if draw method is triple buffer */
 bool		WM_is_draw_triple(struct wmWindow *win);

source/blender/windowmanager/intern/wm_files.c

@@ -342,8 +342,6 @@ static void wm_init_userdef(bContext *C, const bool read_userdef_from_memory)
 
 	/* update tempdir from user preferences */
 	BKE_tempdir_init(U.tempdir);
-
-	BKE_blender_userdef_refresh();
 }
 
 

source/blender/windowmanager/intern/wm_init_exit.c

@@ -181,7 +181,7 @@ void WM_init(bContext *C, int argc, const char **argv)
 	ED_file_init();         /* for fsmenu */
 	ED_node_init_butfuncs();
 	
-	BLF_init(11, U.dpi); /* Please update source/gamengine/GamePlayer/GPG_ghost.cpp if you change this */
+	BLF_init(); /* Please update source/gamengine/GamePlayer/GPG_ghost.cpp if you change this */
 	BLT_lang_init();
 
 	/* Enforce loading the UI for the initial homefile */

source/blender/windowmanager/intern/wm_window.c

@@ -375,7 +375,7 @@ void wm_window_title(wmWindowManager *wm, wmWindow *win)
 	}
 }
 
-static void wm_window_set_dpi(wmWindow *win)
+void WM_window_set_dpi(wmWindow *win)
 {
 	int auto_dpi = GHOST_GetDPIHint(win->ghostwin);
 
@@ -406,8 +406,10 @@ static void wm_window_set_dpi(wmWindow *win)
 	U.pixelsize = GHOST_GetNativePixelSize(win->ghostwin) * pixelsize;
 	U.dpi = dpi / pixelsize;
 	U.virtual_pixel = (pixelsize == 1) ? VIRTUAL_PIXEL_NATIVE : VIRTUAL_PIXEL_DOUBLE;
+	U.widget_unit = (U.pixelsize * U.dpi * 20 + 36) / 72;
 
-	BKE_blender_userdef_refresh();
+	/* update font drawing */
+	BLF_default_dpi(U.pixelsize * U.dpi);
 }
 
 /* belongs to below */
@@ -483,7 +485,7 @@ static void wm_window_ghostwindow_add(wmWindowManager *wm, const char *title, wm
 		}
 		
 		/* needed here, because it's used before it reads userdef */
-		wm_window_set_dpi(win);
+		WM_window_set_dpi(win);
 		
 		wm_window_swap_buffers(win);
 		
@@ -870,7 +872,7 @@ void wm_window_make_drawable(wmWindowManager *wm, wmWindow *win)
 		GHOST_ActivateWindowDrawingContext(win->ghostwin);
 		
 		/* this can change per window */
-		wm_window_set_dpi(win);
+		WM_window_set_dpi(win);
 	}
 }
 
@@ -1070,7 +1072,7 @@ static int ghost_event_proc(GHOST_EventHandle evt, GHOST_TUserDataPtr C_void_ptr
 					WM_jobs_stop(wm, win->screen, NULL);
 				}
 
-				wm_window_set_dpi(win);
+				WM_window_set_dpi(win);
 				
 				/* win32: gives undefined window size when minimized */
 				if (state != GHOST_kWindowStateMinimized) {
@@ -1157,11 +1159,10 @@ static int ghost_event_proc(GHOST_EventHandle evt, GHOST_TUserDataPtr C_void_ptr
 
 			case GHOST_kEventWindowDPIHintChanged:
 			{
-				wm_window_set_dpi(win);
+				WM_window_set_dpi(win);
 				/* font's are stored at each DPI level, without this we can easy load 100's of fonts */
 				BLF_cache_clear();
 
-				BKE_blender_userdef_refresh();
 				WM_main_add_notifier(NC_WINDOW, NULL);      /* full redraw */
 				WM_main_add_notifier(NC_SCREEN | NA_EDITED, NULL);    /* refresh region sizes */
 				break;
@@ -1247,7 +1248,7 @@ static int ghost_event_proc(GHOST_EventHandle evt, GHOST_TUserDataPtr C_void_ptr
 			{
 				// only update if the actual pixel size changes
 				float prev_pixelsize = U.pixelsize;
-				wm_window_set_dpi(win);
+				WM_window_set_dpi(win);
 
 				if (U.pixelsize != prev_pixelsize) {
 					// close all popups since they are positioned with the pixel

source/gameengine/GamePlayer/ghost/GPG_ghost.cpp

@@ -516,7 +516,7 @@ int main(
 #endif
 
 	// Setup builtin font for BLF (mostly copied from creator.c, wm_init_exit.c and interface_style.c)
-	BLF_init(11, U.dpi);
+	BLF_init();
 	BLT_lang_init();
 	BLT_lang_set("");