Introduce X11 toolkit and make message dialogs use it (#13855)

src/video/x11/SDL_x11settings.c

@@ -26,10 +26,6 @@
 #include "SDL_x11video.h"
 #include "SDL_x11settings.h"
 
-#define SDL_XSETTINGS_GDK_WINDOW_SCALING_FACTOR "Gdk/WindowScalingFactor"
-#define SDL_XSETTINGS_GDK_UNSCALED_DPI "Gdk/UnscaledDPI"
-#define SDL_XSETTINGS_XFT_DPI "Xft/DPI"
-
 static void UpdateContentScale(SDL_VideoDevice *_this)
 {
     if (_this) {

src/video/x11/SDL_x11settings.h

@@ -27,6 +27,10 @@
 #include <X11/Xlib.h>
 #include "xsettings-client.h"
 
+#define SDL_XSETTINGS_GDK_WINDOW_SCALING_FACTOR "Gdk/WindowScalingFactor"
+#define SDL_XSETTINGS_GDK_UNSCALED_DPI "Gdk/UnscaledDPI"
+#define SDL_XSETTINGS_XFT_DPI "Xft/DPI"
+
 typedef struct X11_SettingsData {
     XSettingsClient *xsettings;
 } SDLX11_SettingsData;

src/video/x11/SDL_x11sym.h

@@ -42,6 +42,7 @@ SDL_X11_SYM(int,XConvertSelection,(Display* a,Atom b,Atom c,Atom d,Window e,Time
 SDL_X11_SYM(Pixmap,XCreateBitmapFromData,(Display *dpy,Drawable d,_Xconst char *data,unsigned int width,unsigned int height))
 SDL_X11_SYM(Colormap,XCreateColormap,(Display* a,Window b,Visual* c,int d))
 SDL_X11_SYM(Cursor,XCreatePixmapCursor,(Display* a,Pixmap b,Pixmap c,XColor* d,XColor* e,unsigned int f,unsigned int g))
+SDL_X11_SYM(Cursor,XCreatePixmap,(Display* a,Drawable b,unsigned int d,unsigned int e,unsigned int f))
 SDL_X11_SYM(Cursor,XCreateFontCursor,(Display* a,unsigned int b))
 SDL_X11_SYM(XFontSet,XCreateFontSet,(Display* a, _Xconst char* b, char*** c, int* d, char** e))
 SDL_X11_SYM(GC,XCreateGC,(Display* a,Drawable b,unsigned long c,XGCValues* d))
@@ -68,6 +69,7 @@ SDL_X11_SYM(int,XFreeGC,(Display* a,GC b))
 SDL_X11_SYM(int,XFreeFont,(Display* a, XFontStruct* b))
 SDL_X11_SYM(int,XFreeModifiermap,(XModifierKeymap* a))
 SDL_X11_SYM(int,XFreePixmap,(Display* a,Pixmap b))
+SDL_X11_SYM(int,XFreeColormap,(Display* a,Colormap b))
 SDL_X11_SYM(void,XFreeStringList,(char** a))
 SDL_X11_SYM(char*,XGetAtomName,(Display *a,Atom b))
 SDL_X11_SYM(int,XGetInputFocus,(Display *a,Window *b,int *c))
@@ -102,6 +104,8 @@ SDL_X11_SYM(Display*,XOpenDisplay,(_Xconst char* a))
 SDL_X11_SYM(Status,XInitThreads,(void))
 SDL_X11_SYM(int,XPeekEvent,(Display* a,XEvent* b))
 SDL_X11_SYM(int,XPending,(Display* a))
+SDL_X11_SYM(XImage*,XGetImage,(Display* a,Drawable b,int c, int d,unsigned int e,unsigned int f,unsigned long g,int h))
+SDL_X11_SYM(void,XDestroyImage,(XImage *a))
 SDL_X11_SYM(int,XPutImage,(Display* a,Drawable b,GC c,XImage* d,int e,int f,int g,int h,unsigned int i,unsigned int j))
 SDL_X11_SYM(int,XQueryKeymap,(Display* a,char b[32]))
 SDL_X11_SYM(Bool,XQueryPointer,(Display* a,Window b,Window* c,Window* d,int* e,int* f,int* g,int* h,unsigned int* i))