get scale

TODO

@@ -52,11 +52,12 @@
 	[x] selected + tab == indent up
 	[x] selected +shift+tab == indent down
 [x] change alt+<number> to ctrl+<number>
-[ ] add multi cursor system
+[ ] doc: add multi cursor system
 [ ] add binding to open up a cheatsheet of keybinding, with a
     search feature
 [x] implement visual "ruler" at column 80
-[ ] show hidden files config and binding
+[ ] treeview: show hidden files config and binding
+[ ] treeview: add a config to hide files bsed on patterns (*.\.o etc)
 [ ] syntax: highlight FIXME TODO BUG FIX and IMPROVEMENT keywords
 [ ] do not open doc in new tab if current tab has an unchanged document
 [ ] doc: add auto close brackets and quotes

src/main.c

@@ -15,13 +15,15 @@
 
 SDL_Window *window;
 
-static double get_scale(void)
+static double get_scale(SDL_DisplayMode *dm)
 {
 	float dpi, s;
 	SDL_GetDisplayDPI(0, NULL, &dpi, NULL);
+	// TODO: get the current window's screen not the primary
+	printf("w: %d, h: %d\n", dm->w, dm->h);
 	s = (1.0/dpi)*25.4; // size of a point
 	// as per standard 14 point should be 3mm
-	return floor((FONT_14PT_SIZE_MM/(14*s))*10)/10.0;
+	return fmax(1.0, floor((FONT_14PT_SIZE_MM/(14*s))*10)/10.0);
 }
 
 static void get_exe_filename(char *buf, int sz)
@@ -70,12 +72,15 @@ int main(int argc, char **argv)
 #endif
 
 	SDL_DisplayMode dm;
-	SDL_GetCurrentDisplayMode(0, &dm);
+	SDL_GetDesktopDisplayMode(0, &dm);
 
 	window = SDL_CreateWindow(
 	    "", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
 	    dm.w * 0.8, dm.h * 0.8,
 	    SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI | SDL_WINDOW_HIDDEN);
+	int wd = SDL_GetWindowDisplayIndex(window);
+	printf("%d \n", wd);
+	SDL_GetDesktopDisplayMode(wd, &dm);
 	init_window_icon();
 	ren_init(window);
 
@@ -97,7 +102,9 @@ int main(int argc, char **argv)
 	lua_pushstring(L, SDL_GetPlatform());
 	lua_setglobal(L, "PLATFORM");
 
-	lua_pushnumber(L, get_scale());
+	double scale = get_scale(&dm);
+	printf("%f\n", scale);
+	lua_pushnumber(L, scale);
 	lua_setglobal(L, "SCALE");
 
 	char exename[2048];