Support config ventoy_left/ventoy_top/ventoy_color in theme.txt.

The configuration must be the first line in theme.txt and must be in the following format.
ventoy_left_top_color: "@5%@95%@#0000ff@"

The format is very strict:
1. ventoy_left_top_color must start with no space in front of.
2. left/top/color options must be around with 4 @

GRUB2/MOD_SRC/grub-2.04/grub-core/gfxmenu/theme_loader.c

@@ -295,6 +295,8 @@ theme_set_string (grub_gfxmenu_view_t view,
       if (! view->title_text)
         return grub_errno;
     }
+  else if (! grub_strcmp ("ventoy_left_top_color", name))
+      return grub_errno;
   else
     {
       return grub_error (GRUB_ERR_BAD_ARGUMENT,

GRUB2/MOD_SRC/grub-2.04/grub-core/ventoy/ventoy.c

@@ -280,6 +280,121 @@ static int ventoy_hwinfo_init(void)
     return 0;
 }
 
+static global_var_cfg g_global_vars[] = 
+{
+    { "gfxmode",            "1024x768",   NULL },
+    { ventoy_left_key,      "5%",         NULL },
+    { ventoy_top_key,       "95%",        NULL },
+    { ventoy_color_key,     "#0000ff",    NULL },
+    { NULL,                 NULL,         NULL }
+};
+
+static const char * ventoy_global_var_read_hook(struct grub_env_var *var, const char *val)
+{
+    int i;
+
+    for (i = 0; g_global_vars[i].name; i++)
+    {
+        if (grub_strcmp(g_global_vars[i].name, var->name) == 0)
+        {
+            return g_global_vars[i].value;
+        }
+    }
+
+    return val;
+}
+
+static char * ventoy_global_var_write_hook(struct grub_env_var *var, const char *val)
+{
+    int i;
+
+    for (i = 0; g_global_vars[i].name; i++)
+    {
+        if (grub_strcmp(g_global_vars[i].name, var->name) == 0)
+        {
+            grub_check_free(g_global_vars[i].value);
+            g_global_vars[i].value = grub_strdup(val);
+            break;
+        }
+    }
+
+    return grub_strdup(val);
+}
+
+int ventoy_global_var_init(void)
+{
+    int i;
+
+    for (i = 0; g_global_vars[i].name; i++)
+    {
+        g_global_vars[i].value = grub_strdup(g_global_vars[i].defval);
+        ventoy_env_export(g_global_vars[i].name, g_global_vars[i].defval);        
+        grub_register_variable_hook(g_global_vars[i].name, ventoy_global_var_read_hook, ventoy_global_var_write_hook);
+    }
+
+    return 0;
+}
+
+static ctrl_var_cfg g_ctrl_vars[] = 
+{
+    { "VTOY_WIN11_BYPASS_CHECK",  0 },
+    { "VTOY_LINUX_REMOUNT",       0 },
+    { "VTOY_SECONDARY_BOOT_MENU", 1 },
+    { NULL, 0 }
+};
+
+static const char * ventoy_ctrl_var_read_hook(struct grub_env_var *var, const char *val)
+{
+    int i;
+
+    for (i = 0; g_ctrl_vars[i].name; i++)
+    {
+        if (grub_strcmp(g_ctrl_vars[i].name, var->name) == 0)
+        {
+            return g_ctrl_vars[i].value ? "1" : "0";
+        }
+    }
+
+    return val;
+}
+
+static char * ventoy_ctrl_var_write_hook(struct grub_env_var *var, const char *val)
+{
+    int i;
+
+    for (i = 0; g_ctrl_vars[i].name; i++)
+    {
+        if (grub_strcmp(g_ctrl_vars[i].name, var->name) == 0)
+        {
+            if (val && val[0] == '1' && val[1] == 0)
+            {
+                g_ctrl_vars[i].value = 1;
+                return grub_strdup("1");
+            }
+            else
+            {
+                g_ctrl_vars[i].value = 0;
+                return grub_strdup("0");
+            }
+        }
+    }
+
+    return grub_strdup(val);
+}
+
+int ventoy_ctrl_var_init(void)
+{
+    int i;
+
+    for (i = 0; g_ctrl_vars[i].name; i++)
+    {
+        ventoy_env_export(g_ctrl_vars[i].name, g_ctrl_vars[i].value ? "1" : "0");
+        grub_register_variable_hook(g_ctrl_vars[i].name, ventoy_ctrl_var_read_hook, ventoy_ctrl_var_write_hook);
+    }
+
+    return 0;
+}
+
 GRUB_MOD_INIT(ventoy)
 {
     ventoy_hwinfo_init();

GRUB2/MOD_SRC/grub-2.04/grub-core/ventoy/ventoy_cmd.c

@@ -148,8 +148,6 @@ static char g_iso_vd_id_application[130];
 static int g_pager_flag = 0;
 static char g_old_pager[32];
 
-static char g_vtoy_gfxmode[64];
-
 const char *g_menu_class[img_type_max] = 
 {
     "vtoyiso", "vtoywim", "vtoyefi", "vtoyimg", "vtoyvhd", "vtoyvtoy"
@@ -364,6 +362,42 @@ static int ventoy_enum_video_mode(void)
     VENTOY_CMD_RETURN(GRUB_ERR_NONE);
 }
 
+static int ventoy_pre_parse_data(char *src, int size)
+{
+    char c;
+    char *pos = NULL;
+    char buf[256];
+
+    if (size < 20 || grub_strncmp(src, "ventoy_left_top_color", 21))
+    {
+        return 0;
+    }
+
+    pos = src + 21;
+    while (*pos && *pos != '\r' && *pos != '\n')
+    {
+        pos++;
+    }
+
+    c = *pos;
+    *pos = 0;
+
+    if (grub_strlen(src) > 200)
+    {
+        goto end;
+    }
+
+    grub_snprintf(buf, sizeof(buf), 
+        "regexp -s 1:%s -s 2:%s -s 3:%s \"@([^@]*)@([^@]*)@([^@]*)@\" \"%s\"", 
+        ventoy_left_key, ventoy_top_key, ventoy_color_key, src);
+
+    grub_script_execute_sourcecode(buf);
+
+end:    
+    *pos = c;
+    return 0;    
+}
+
 static grub_file_t ventoy_wrapper_open(grub_file_t rawFile, enum grub_file_type type)
 {
     int len;
@@ -397,6 +431,7 @@ static grub_file_t ventoy_wrapper_open(grub_file_t rawFile, enum grub_file_type
     }
 
     grub_file_read(rawFile, file->data, rawFile->size);
+    ventoy_pre_parse_data((char *)file->data, (int)rawFile->size);
     len = ventoy_fill_data(4096, (char *)file->data + rawFile->size);
 
     g_old_file = rawFile;
@@ -6231,82 +6266,6 @@ static const char * ventoy_menu_lang_read_hook(struct grub_env_var *var, const c
     return ventoy_get_vmenu_title(val);
 }
 
-static const char * ventoy_gfxmode_read_hook(struct grub_env_var *var, const char *val)
-{
-    (void)var;
-    (void)val;
-
-    return g_vtoy_gfxmode;
-}
-
-static char * ventoy_gfxmode_write_hook(struct grub_env_var *var, const char *val)
-{
-    (void)var;
-
-    grub_strncpy(g_vtoy_gfxmode, val, sizeof(g_vtoy_gfxmode) - 1);
-    return grub_strdup(val);
-}
-
-static ctrl_var_cfg g_ctrl_vars[] = 
-{
-    { "VTOY_WIN11_BYPASS_CHECK",  0 },
-    { "VTOY_LINUX_REMOUNT",       0 },
-    { "VTOY_SECONDARY_BOOT_MENU", 1 },
-    { NULL, 0 }
-};
-
-static const char * ventoy_ctrl_var_read_hook(struct grub_env_var *var, const char *val)
-{
-    int i;
-
-    for (i = 0; g_ctrl_vars[i].name; i++)
-    {
-        if (grub_strcmp(g_ctrl_vars[i].name, var->name) == 0)
-        {
-            return g_ctrl_vars[i].value ? "1" : "0";
-        }
-    }
-
-    return val;
-}
-
-static char * ventoy_ctrl_var_write_hook(struct grub_env_var *var, const char *val)
-{
-    int i;
-
-    for (i = 0; g_ctrl_vars[i].name; i++)
-    {
-        if (grub_strcmp(g_ctrl_vars[i].name, var->name) == 0)
-        {
-            if (val && val[0] == '1' && val[1] == 0)
-            {
-                g_ctrl_vars[i].value = 1;
-                return grub_strdup("1");
-            }
-            else
-            {
-                g_ctrl_vars[i].value = 0;
-                return grub_strdup("0");
-            }
-        }
-    }
-
-    return grub_strdup(val);
-}
-
-static int ventoy_ctrl_var_init(void)
-{
-    int i;
-
-    for (i = 0; g_ctrl_vars[i].name; i++)
-    {
-        ventoy_env_export(g_ctrl_vars[i].name, g_ctrl_vars[i].value ? "1" : "0");
-        grub_register_variable_hook(g_ctrl_vars[i].name, ventoy_ctrl_var_read_hook, ventoy_ctrl_var_write_hook);
-    }
-
-    return 0;
-}
-
 int ventoy_env_init(void)
 {
     int i;
@@ -6314,10 +6273,9 @@ int ventoy_env_init(void)
 
     grub_env_set("vtdebug_flag", "");
 
-    grub_register_variable_hook("gfxmode", ventoy_gfxmode_read_hook, ventoy_gfxmode_write_hook);
     grub_register_vtoy_menu_lang_hook(ventoy_menu_lang_read_hook);
-
     ventoy_ctrl_var_init();
+    ventoy_global_var_init();
 
     g_part_list_buf = grub_malloc(VTOY_PART_BUF_LEN);
     g_tree_script_buf = grub_malloc(VTOY_MAX_SCRIPT_BUF);

GRUB2/MOD_SRC/grub-2.04/grub-core/ventoy/ventoy_def.h

@@ -77,6 +77,10 @@
 #define VTOY_ARCH_CPIO  "ventoy_x86.cpio"
 #endif
 
+#define ventoy_left_key     "VTLE_LFT"
+#define ventoy_top_key      "VTLE_TOP"
+#define ventoy_color_key    "VTLE_CLR"
+
 #define ventoy_varg_4(arg) arg[0], arg[1], arg[2], arg[3]
 #define ventoy_varg_8(arg) arg[0], arg[1], arg[2], arg[3], arg[4], arg[5], arg[6], arg[7]
 
@@ -1256,6 +1260,13 @@ typedef struct systemd_menu_ctx
     int len;
 }systemd_menu_ctx;
 
+typedef struct global_var_cfg
+{
+    const char *name;
+    const char *defval;
+    char *value;
+}global_var_cfg;
+
 typedef struct ctrl_var_cfg
 {
     const char *name;
@@ -1284,6 +1295,8 @@ int ventoy_plugin_load_menu_lang(int init, const char *lang);
 const char *ventoy_get_vmenu_title(const char *vMenu);
 grub_err_t ventoy_cmd_cur_menu_lang(grub_extcmd_context_t ctxt, int argc, char **args);
 extern int ventoy_menu_push_key(int code);
+int ventoy_ctrl_var_init(void);
+int ventoy_global_var_init(void);
 
 #endif /* __VENTOY_DEF_H__ */
 

GRUB2/MOD_SRC/grub-2.04/grub-core/ventoy/ventoy_plugin.c

@@ -421,19 +421,19 @@ static int ventoy_plugin_theme_entry(VTOY_JSON *json, const char *isodisk)
     value = vtoy_json_get_string_ex(json->pstChild, "ventoy_left");
     if (value)
     {
-        ventoy_env_export("VTLE_LFT", value);
+        ventoy_env_export(ventoy_left_key, value);
     }
     
     value = vtoy_json_get_string_ex(json->pstChild, "ventoy_top");
     if (value)
     {
-        ventoy_env_export("VTLE_TOP", value);
+        ventoy_env_export(ventoy_top_key, value);
     }
     
     value = vtoy_json_get_string_ex(json->pstChild, "ventoy_color");
     if (value)
     {
-        ventoy_env_export("VTLE_CLR", value);
+        ventoy_env_export(ventoy_color_key, value);
     }
 
     node = vtoy_json_find_item(json->pstChild, JSON_TYPE_ARRAY, "fonts");