patch 8.1.2382: MS-Windows: When using VTP bold+inverse doesn't work

Problem:    MS-Windows: When using VTP bold+inverse doesn't work.
Solution:   Compare with the default colors. (Nobuhiro Takasaki, closes #5303)

src/os_win32.c

@@ -7414,34 +7414,14 @@ set_console_color_rgb(void)
 {
 # ifdef FEAT_TERMGUICOLORS
     DYN_CONSOLE_SCREEN_BUFFER_INFOEX csbi;
-    int id;
+    guicolor_T	fg, bg;
-    guicolor_T fg = INVALCOLOR;
+    int		ctermfg, ctermbg;
-    guicolor_T bg = INVALCOLOR;
-    int ctermfg;
-    int ctermbg;
 
     if (!USE_VTP)
 	return;
 
-    id = syn_name2id((char_u *)"Normal");
+    get_default_console_color(&ctermfg, &ctermbg, &fg, &bg);
-    if (id > 0 && p_tgc)
+
-	syn_id2colors(id, &fg, &bg);
-    if (fg == INVALCOLOR)
-    {
-	ctermfg = -1;
-	if (id > 0)
-	    syn_id2cterm_bg(id, &ctermfg, &ctermbg);
-	fg = ctermfg != -1 ? ctermtoxterm(ctermfg) : default_console_color_fg;
-	cterm_normal_fg_gui_color = fg;
-    }
-    if (bg == INVALCOLOR)
-    {
-	ctermbg = -1;
-	if (id > 0)
-	    syn_id2cterm_bg(id, &ctermfg, &ctermbg);
-	bg = ctermbg != -1 ? ctermtoxterm(ctermbg) : default_console_color_bg;
-	cterm_normal_bg_gui_color = bg;
-    }
     fg = (GetRValue(fg) << 16) | (GetGValue(fg) << 8) | GetBValue(fg);
     bg = (GetRValue(bg) << 16) | (GetGValue(bg) << 8) | GetBValue(bg);
 
@@ -7459,6 +7439,51 @@ set_console_color_rgb(void)
 # endif
 }
 
+# if defined(FEAT_TERMGUICOLORS) || defined(PROTO)
+    void
+get_default_console_color(
+    int *cterm_fg,
+    int *cterm_bg,
+    guicolor_T *gui_fg,
+    guicolor_T *gui_bg)
+{
+    int id;
+    guicolor_T guifg = INVALCOLOR;
+    guicolor_T guibg = INVALCOLOR;
+    int ctermfg = 0;
+    int ctermbg = 0;
+
+    id = syn_name2id((char_u *)"Normal");
+    if (id > 0 && p_tgc)
+	syn_id2colors(id, &guifg, &guibg);
+    if (guifg == INVALCOLOR)
+    {
+	ctermfg = -1;
+	if (id > 0)
+	    syn_id2cterm_bg(id, &ctermfg, &ctermbg);
+	guifg = ctermfg != -1 ? ctermtoxterm(ctermfg)
+						    : default_console_color_fg;
+	cterm_normal_fg_gui_color = guifg;
+	ctermfg = ctermfg < 0 ? 0 : ctermfg;
+    }
+    if (guibg == INVALCOLOR)
+    {
+	ctermbg = -1;
+	if (id > 0)
+	    syn_id2cterm_bg(id, &ctermfg, &ctermbg);
+	guibg = ctermbg != -1 ? ctermtoxterm(ctermbg)
+						    : default_console_color_bg;
+	cterm_normal_bg_gui_color = guibg;
+	ctermbg = ctermbg < 0 ? 0 : ctermbg;
+    }
+
+    *cterm_fg = ctermfg;
+    *cterm_bg = ctermbg;
+    *gui_fg = guifg;
+    *gui_bg = guibg;
+}
+# endif
+
     static void
 reset_console_color_rgb(void)
 {

src/proto/os_win32.pro

@@ -71,6 +71,7 @@ void used_file_arg(char *name, int literal, int full_path, int diff_mode);
 void set_alist_count(void);
 void fix_arg_enc(void);
 int mch_setenv(char *var, char *value, int x);
+void get_default_console_color(int *cterm_fg, int *cterm_bg, guicolor_T *gui_fg, guicolor_T *gui_bg);
 void control_console_color_rgb(void);
 int use_vtp(void);
 int is_term_win32(void);

src/screen.c

@@ -1777,6 +1777,33 @@ screen_start_highlight(int attr)
 		else
 		    attr = aep->ae_attr;
 	    }
+#if defined(FEAT_VTP) && defined(FEAT_TERMGUICOLORS)
+	    if (use_vtp())
+	    {
+		guicolor_T  defguifg, defguibg;
+		int	    defctermfg, defctermbg;
+
+		// If FG and BG are unset, the color is undefined when
+		// BOLD+INVERSE. Use Normal as the default value.
+		get_default_console_color(&defctermfg, &defctermbg, &defguifg,
+								    &defguibg);
+
+		if (p_tgc)
+		{
+		    if (aep == NULL || COLOR_INVALID(aep->ae_u.cterm.fg_rgb))
+			term_fg_rgb_color(defguifg);
+		    if (aep == NULL || COLOR_INVALID(aep->ae_u.cterm.bg_rgb))
+			term_bg_rgb_color(defguibg);
+		}
+		else if (t_colors >= 256)
+		{
+		    if (aep == NULL || aep->ae_u.cterm.fg_color == 0)
+			term_fg_color(defctermfg);
+		    if (aep == NULL || aep->ae_u.cterm.bg_color == 0)
+			term_bg_color(defctermbg);
+		}
+	    }
+#endif
 	    if ((attr & HL_BOLD) && *T_MD != NUL)	/* bold */
 		out_str(T_MD);
 	    else if (aep != NULL && cterm_normal_fg_bold && (

src/version.c

@@ -742,6 +742,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2382,
 /**/
     2381,
 /**/