fix whoops

src/core_lua.c

@@ -2216,7 +2216,12 @@ static int gl_scissor(lua_State *L)
 {
 	if (lua_toboolean(L, 1)) {
 		glEnable(GL_SCISSOR_TEST);
-		glScissor(luaL_checknumber(L, 2), screen->h - luaL_checknumber(L, 3) - luaL_checknumber(L, 5), luaL_checknumber(L, 4), luaL_checknumber(L, 5));
+		float x = luaL_checknumber(L, 2);
+		float y = luaL_checknumber(L, 3);
+		float w = luaL_checknumber(L, 4);
+		float h = luaL_checknumber(L, 5);
+		y = screen->h / screen_zoom - y - h;
+		glScissor(x, y, w, h);
 	} else glDisable(GL_SCISSOR_TEST);
 	return 0;
 }

src/main.c

@@ -459,8 +459,8 @@ bool on_event(SDL_Event *event)
 		}
 		return TRUE;
 	case SDL_MOUSEMOTION:
-		mousex = event->motion.x;
-		mousey = event->motion.y;
+		mousex = event->motion.x / screen_zoom;
+		mousey = event->motion.y / screen_zoom;
 
 		if (current_mousehandler != LUA_NOREF)
 		{

src/wait.c

@@ -46,13 +46,13 @@ static int draw_last_frame(lua_State *L)
 {
 	if (!bkg_t) return 0;
 
-	int w, h;
-	SDL_GetWindowSize(window, &w, &h);
+	float w = screen->w / screen_zoom;
+	float h = screen->h / screen_zoom;
 
 	GLfloat btexcoords[2*4] = {
-		0, (float)h/(float)bkg_realh,
-		(float)w/(float)bkg_realw, (float)h/(float)bkg_realh,
-		(float)w/(float)bkg_realw, 0,
+		0, (float)screen->h/(float)bkg_realh,
+		(float)screen->w/(float)bkg_realw, (float)screen->h/(float)bkg_realh,
+		(float)screen->w/(float)bkg_realw, 0,
 		0, 0
 	};
 	GLfloat bcolors[4*4] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
@@ -119,8 +119,8 @@ static int enable(lua_State *L)
 
 		SDL_GL_SwapWindow(window);
 
-		int w, h;
-		SDL_GetWindowSize(window, &w, &h);
+		float w = screen->w;
+		float h = screen->h;
 
 		bkg_w = w;
 		bkg_h = h;