replace uses of SDL_Window with RenWindow (#1319)

Since Renwindow contains our instance of SDL_Window we can use this
to simplify future logic to create separate window instances

src/api/system.c

@@ -7,6 +7,7 @@
 #include <sys/stat.h>
 #include "api.h"
 #include "../rencache.h"
+#include "../renwindow.h"
 #ifdef _WIN32
   #include <direct.h>
   #include <windows.h>
@@ -36,8 +37,7 @@
 #endif
 #endif
 
-extern SDL_Window *window;
+extern RenWindow window_renderer;
-
 
 static const char* button_name(int button) {
   switch (button) {
@@ -76,7 +76,7 @@ static SDL_HitTestResult SDLCALL hit_test(SDL_Window *window, const SDL_Point *p
   const int controls_width = hit_info->controls_width;
   int w, h;
 
-  SDL_GetWindowSize(window, &w, &h);
+  SDL_GetWindowSize(window_renderer.window, &w, &h);
 
   if (pt->y < hit_info->title_height &&
     #if RESIZE_FROM_TOP
@@ -326,7 +326,7 @@ top:
       return 3;
 
       case SDL_FINGERDOWN:
-      SDL_GetWindowSize(window, &w, &h);
+      SDL_GetWindowSize(window_renderer.window, &w, &h);
 
       lua_pushstring(L, "touchpressed");
       lua_pushinteger(L, (lua_Integer)(e.tfinger.x * w));
@@ -335,7 +335,7 @@ top:
       return 4;
 
     case SDL_FINGERUP:
-      SDL_GetWindowSize(window, &w, &h);
+      SDL_GetWindowSize(window_renderer.window, &w, &h);
 
       lua_pushstring(L, "touchreleased");
       lua_pushinteger(L, (lua_Integer)(e.tfinger.x * w));
@@ -351,7 +351,7 @@ top:
         e.tfinger.dx += event_plus.tfinger.dx;
         e.tfinger.dy += event_plus.tfinger.dy;
       }
-      SDL_GetWindowSize(window, &w, &h);
+      SDL_GetWindowSize(window_renderer.window, &w, &h);
 
       lua_pushstring(L, "touchmoved");
       lua_pushinteger(L, (lua_Integer)(e.tfinger.x * w));
@@ -415,7 +415,7 @@ static int f_set_cursor(lua_State *L) {
 
 static int f_set_window_title(lua_State *L) {
   const char *title = luaL_checkstring(L, 1);
-  SDL_SetWindowTitle(window, title);
+  SDL_SetWindowTitle(window_renderer.window, title);
   return 0;
 }
 
@@ -425,39 +425,39 @@ enum { WIN_NORMAL, WIN_MINIMIZED, WIN_MAXIMIZED, WIN_FULLSCREEN };
 
 static int f_set_window_mode(lua_State *L) {
   int n = luaL_checkoption(L, 1, "normal", window_opts);
-  SDL_SetWindowFullscreen(window,
+  SDL_SetWindowFullscreen(window_renderer.window,
     n == WIN_FULLSCREEN ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
-  if (n == WIN_NORMAL) { SDL_RestoreWindow(window); }
+  if (n == WIN_NORMAL) { SDL_RestoreWindow(window_renderer.window); }
-  if (n == WIN_MAXIMIZED) { SDL_MaximizeWindow(window); }
+  if (n == WIN_MAXIMIZED) { SDL_MaximizeWindow(window_renderer.window); }
-  if (n == WIN_MINIMIZED) { SDL_MinimizeWindow(window); }
+  if (n == WIN_MINIMIZED) { SDL_MinimizeWindow(window_renderer.window); }
   return 0;
 }
 
 
 static int f_set_window_bordered(lua_State *L) {
   int bordered = lua_toboolean(L, 1);
-  SDL_SetWindowBordered(window, bordered);
+  SDL_SetWindowBordered(window_renderer.window, bordered);
   return 0;
 }
 
 
 static int f_set_window_hit_test(lua_State *L) {
   if (lua_gettop(L) == 0) {
-    SDL_SetWindowHitTest(window, NULL, NULL);
+    SDL_SetWindowHitTest(window_renderer.window, NULL, NULL);
     return 0;
   }
   window_hit_info->title_height = luaL_checknumber(L, 1);
   window_hit_info->controls_width = luaL_checknumber(L, 2);
   window_hit_info->resize_border = luaL_checknumber(L, 3);
-  SDL_SetWindowHitTest(window, hit_test, window_hit_info);
+  SDL_SetWindowHitTest(window_renderer.window, hit_test, window_hit_info);
   return 0;
 }
 
 
 static int f_get_window_size(lua_State *L) {
   int x, y, w, h;
-  SDL_GetWindowSize(window, &w, &h);
+  SDL_GetWindowSize(window_renderer.window, &w, &h);
-  SDL_GetWindowPosition(window, &x, &y);
+  SDL_GetWindowPosition(window_renderer.window, &x, &y);
   lua_pushinteger(L, w);
   lua_pushinteger(L, h);
   lua_pushinteger(L, x);
@@ -471,22 +471,22 @@ static int f_set_window_size(lua_State *L) {
   double h = luaL_checknumber(L, 2);
   double x = luaL_checknumber(L, 3);
   double y = luaL_checknumber(L, 4);
-  SDL_SetWindowSize(window, w, h);
+  SDL_SetWindowSize(window_renderer.window, w, h);
-  SDL_SetWindowPosition(window, x, y);
+  SDL_SetWindowPosition(window_renderer.window, x, y);
   ren_resize_window();
   return 0;
 }
 
 
 static int f_window_has_focus(lua_State *L) {
-  unsigned flags = SDL_GetWindowFlags(window);
+  unsigned flags = SDL_GetWindowFlags(window_renderer.window);
   lua_pushboolean(L, flags & SDL_WINDOW_INPUT_FOCUS);
   return 1;
 }
 
 
 static int f_get_window_mode(lua_State *L) {
-  unsigned flags = SDL_GetWindowFlags(window);
+  unsigned flags = SDL_GetWindowFlags(window_renderer.window);
   if (flags & SDL_WINDOW_FULLSCREEN_DESKTOP) {
     lua_pushstring(L, "fullscreen");
   } else if (flags & SDL_WINDOW_MINIMIZED) {
@@ -524,8 +524,8 @@ static int f_raise_window(lua_State *L) {
     to allow the window to be focused. Also on wayland the raise window event
     may not always be obeyed.
   */
-  SDL_SetWindowInputFocus(window);
+  SDL_SetWindowInputFocus(window_renderer.window);
-  SDL_RaiseWindow(window);
+  SDL_RaiseWindow(window_renderer.window);
   return 0;
 }
 
@@ -901,7 +901,7 @@ static int f_fuzzy_match(lua_State *L) {
 
 static int f_set_window_opacity(lua_State *L) {
   double n = luaL_checknumber(L, 1);
-  int r = SDL_SetWindowOpacity(window, n);
+  int r = SDL_SetWindowOpacity(window_renderer.window, n);
   lua_pushboolean(L, r > -1);
   return 1;
 }

src/main.c

@@ -18,7 +18,7 @@
 #endif
 
 
-SDL_Window *window;
+static SDL_Window *window;
 
 static double get_scale(void) {
 #ifndef __APPLE__

src/renderer.c

@@ -20,7 +20,7 @@
 #define MAX_LOADABLE_GLYPHSETS 1024
 #define SUBPIXEL_BITMAPS_CACHED 3
 
-static RenWindow window_renderer = {0};
+RenWindow window_renderer = {0};
 static FT_Library library;
 
 // draw_rect_surface is used as a 1x1 surface to simplify ren_draw_rect with blending