lovr.graphics.isInitialized;

Returns whether the graphics module is initialized.  Used by the default
error handler to know if it's safe to try to render the error screen.

etc/boot.lua

@@ -167,7 +167,9 @@ function lovr.errhand(message)
   message = tostring(message) .. formatTraceback(debug.traceback('', 4))
   print('Error:\n' .. message)
 
-  if not lovr.graphics then return function() return 1 end end
+  if not lovr.graphics or not lovr.graphics.isInitialized() then
+    return function() return 1 end
+  end
 
   if lovr.audio then lovr.audio.stop() end
 

src/api/l_graphics.c

@@ -682,6 +682,12 @@ static int l_lovrGraphicsInitialize(lua_State* L) {
   return 0;
 }
 
+static int l_lovrGraphicsIsInitialized(lua_State* L) {
+  bool initialized = lovrGraphicsIsInitialized();
+  lua_pushboolean(L, initialized);
+  return 1;
+}
+
 static int l_lovrGraphicsSubmit(lua_State* L) {
   bool table = lua_istable(L, 1);
   int length = table ? luax_len(L, 1) : lua_gettop(L);
@@ -1492,6 +1498,7 @@ static int l_lovrGraphicsGetPass(lua_State* L) {
 
 static const luaL_Reg lovrGraphics[] = {
   { "initialize", l_lovrGraphicsInitialize },
+  { "isInitialized", l_lovrGraphicsIsInitialized },
   { "submit", l_lovrGraphicsSubmit },
   { "present", l_lovrGraphicsPresent },
   { "wait", l_lovrGraphicsWait },

src/modules/graphics/graphics.c

@@ -741,6 +741,10 @@ void lovrGraphicsDestroy() {
   memset(&state, 0, sizeof(state));
 }
 
+bool lovrGraphicsIsInitialized() {
+  return state.initialized;
+}
+
 void lovrGraphicsGetDevice(GraphicsDevice* device) {
   device->deviceId = state.device.deviceId;
   device->vendorId = state.device.vendorId;

src/modules/graphics/graphics.h

@@ -96,6 +96,7 @@ enum {
 
 bool lovrGraphicsInit(GraphicsConfig* config);
 void lovrGraphicsDestroy(void);
+bool lovrGraphicsIsInitialized(void);
 
 void lovrGraphicsGetDevice(GraphicsDevice* device);
 void lovrGraphicsGetFeatures(GraphicsFeatures* features);