New API: GetScreenRect and define g_rcScr as a macro calling GetScreenRect

include/minigui.h

@@ -81,16 +81,26 @@ extern "C" {
      */
 
 /**
- * \var RECT g_rcScr
- * \brief Contains the rectangle of the whole screen.
+ * \fn RECT GUIAPI GetScreenRect (void);
+ * \brief Return the rectangle of the physical screen.
+ *
+ * Since 4.2.0
  */
-extern MG_EXPORT RECT g_rcScr;
+MG_EXPORT RECT GUIAPI GetScreenRect (void);
+
+/**
+ * \def g_rcScr
+ * \brief Contains the rectangle of the whole screen.
+ *
+ * \note Since 4.2.0, g_rcScr is defined a macro to call \a GetScreenRect.
+ */
+#define g_rcScr (GetScreenRect())
 
 /**
  * \def g_rcDesktop
  * \brief Contains the rectangle of desktop of the application.
  *
- * \a g_rcDesktop is defined as an alias (macro) of \a g_rcScr.
+ * \note This global variable is defined as an alias (macro) of \a g_rcScr.
  *
  * \sa g_rcScr
  */

src/newgal/newgal.c

@@ -65,6 +65,12 @@
 
 GAL_Surface* __gal_screen;
 
+RECT GUIAPI GetScreenRect (void)
+{
+    RECT rc = { 0, 0, __gal_screen->w, __gal_screen->h };
+    return rc;
+}
+
 BOOL GAL_ParseVideoMode (const char* mode, int* w, int* h, int* depth)
 {
     const char* tmp;