display loop runs

game/graphics/sceGraphicsInterface.cpp

@@ -0,0 +1,33 @@
+#include "game/graphics/sceGraphicsInterface.h"
+#include "common/util/assert.h"
+#include "game/graphics/gfx.h"
+
+#include <cstdio>
+
+/*!
+ * Wait for rendering to complete.
+ * In the PC Port, this currently does nothing.
+ *
+ * From my current understanding, we can get away with this and just sync everything on vsync.
+ * However, there are two calls to this per frame.
+ *
+ * But I don't fully understand why they call sceGsSyncPath where they do (right before depth cue)
+ * so maybe the depth cue looks at the z-buffer of the last rendered frame when setting up the dma
+ * for the next frame?  The debug drawing also happens after this.
+ *
+ * The second call is right before swapping buffers/vsync, so that makes sense.
+ *
+ *
+ */
+u32 sceGsSyncPath(u32 mode, u32 timeout) {
+  assert(mode == 0 && timeout == 0);
+  return 0;
+}
+
+/*!
+ * Actual vsync.
+ */
+u32 sceGsSyncV(u32 mode) {
+  assert(mode == 0);
+  return Gfx::vsync();
+}