Add C3D_FrameCounter() for retrieving the value of the frame counter

include/c3d/renderqueue.h

@@ -28,6 +28,7 @@ enum
 
 float C3D_FrameRate(float fps);
 void C3D_FrameSync(void);
+u32 C3D_FrameCounter(int id);
 
 bool C3D_FrameBegin(u8 flags);
 bool C3D_FrameDrawOn(C3D_RenderTarget* target);

source/renderqueue.c

@@ -120,6 +120,11 @@ void C3D_FrameSync(void)
 	} while (cur[0]==start[0] || cur[1]==start[1]);
 }
 
+u32 C3D_FrameCounter(int id)
+{
+	return frameCounter[id];
+}
+
 static bool C3Di_WaitAndClearQueue(s64 timeout)
 {
 	gxCmdQueue_s* queue = &C3Di_GetContext()->gxQueue;