pass RenWindow by argument (#1321)

* pass RenWindow to all renderer functions that need it

* pass RenWindow to all rencache functions that need it

src/api/renderer.c

@@ -90,7 +90,7 @@ static int f_font_load(lua_State *L) {
     return ret_code;
 
   RenFont** font = lua_newuserdata(L, sizeof(RenFont*));
-  *font = ren_font_load(filename, size, antialiasing, hinting, style);
+  *font = ren_font_load(&window_renderer, filename, size, antialiasing, hinting, style);
   if (!*font)
     return luaL_error(L, "failed to load font");
   luaL_setmetatable(L, API_TYPE_FONT);
@@ -130,7 +130,7 @@ static int f_font_copy(lua_State *L) {
   }
   for (int i = 0; i < FONT_FALLBACK_MAX && fonts[i]; ++i) {
     RenFont** font = lua_newuserdata(L, sizeof(RenFont*));
-    *font = ren_font_copy(fonts[i], size, antialiasing, hinting, style);
+    *font = ren_font_copy(&window_renderer, fonts[i], size, antialiasing, hinting, style);
     if (!*font)
       return luaL_error(L, "failed to copy font");
     luaL_setmetatable(L, API_TYPE_FONT);
@@ -198,7 +198,7 @@ static int f_font_get_width(lua_State *L) {
   size_t len;
   const char *text = luaL_checklstring(L, 2, &len);
 
-  lua_pushnumber(L, ren_font_group_get_width(fonts, text, len));
+  lua_pushnumber(L, ren_font_group_get_width(&window_renderer, fonts, text, len));
   return 1;
 }
 
@@ -217,7 +217,7 @@ static int f_font_get_size(lua_State *L) {
 static int f_font_set_size(lua_State *L) {
   RenFont* fonts[FONT_FALLBACK_MAX]; font_retrieve(L, fonts, 1);
   float size = luaL_checknumber(L, 2);
-  ren_font_group_set_size(fonts, size);
+  ren_font_group_set_size(&window_renderer, fonts, size);
   return 0;
 }
 
@@ -276,7 +276,7 @@ static int f_show_debug(lua_State *L) {
 
 static int f_get_size(lua_State *L) {
   int w, h;
-  ren_get_size(&w, &h);
+  ren_get_size(&window_renderer, &w, &h);
   lua_pushnumber(L, w);
   lua_pushnumber(L, h);
   return 2;
@@ -284,13 +284,13 @@ static int f_get_size(lua_State *L) {
 
 
 static int f_begin_frame(UNUSED lua_State *L) {
-  rencache_begin_frame();
+  rencache_begin_frame(&window_renderer);
   return 0;
 }
 
 
 static int f_end_frame(UNUSED lua_State *L) {
-  rencache_end_frame();
+  rencache_end_frame(&window_renderer);
   // clear the font reference table
   lua_newtable(L);
   lua_rawseti(L, LUA_REGISTRYINDEX, RENDERER_FONT_REF);
@@ -348,7 +348,7 @@ static int f_draw_text(lua_State *L) {
   float x = luaL_checknumber(L, 3);
   int y = luaL_checknumber(L, 4);
   RenColor color = checkcolor(L, 5, 255);
-  x = rencache_draw_text(fonts, text, len, x, y, color);
+  x = rencache_draw_text(&window_renderer, fonts, text, len, x, y, color);
   lua_pushnumber(L, x);
   return 1;
 }

src/api/system.c

@@ -37,8 +37,6 @@
 #endif
 #endif
 
-extern RenWindow window_renderer;
-
 static const char* button_name(int button) {
   switch (button) {
     case SDL_BUTTON_LEFT   : return "left";
@@ -188,7 +186,7 @@ top:
 
     case SDL_WINDOWEVENT:
       if (e.window.event == SDL_WINDOWEVENT_RESIZED) {
-        ren_resize_window();
+        ren_resize_window(&window_renderer);
         lua_pushstring(L, "resized");
         /* The size below will be in points. */
         lua_pushinteger(L, e.window.data1);
@@ -473,7 +471,7 @@ static int f_set_window_size(lua_State *L) {
   double y = luaL_checknumber(L, 4);
   SDL_SetWindowSize(window_renderer.window, w, h);
   SDL_SetWindowPosition(window_renderer.window, x, y);
-  ren_resize_window();
+  ren_resize_window(&window_renderer);
   return 0;
 }