context reinit support

core/glframebuffer_mipmap.cpp

@@ -48,3 +48,9 @@ void FramebufferMipmap::create() {
 	for (int i = 0; i < fbo.size() - 1; ++i)
 		fbo[i]->blit(0, fbo[i + 1]->id(), 0, fbo[i]->rect(), fbo[i + 1]->rect(), GL_COLOR_BUFFER_BIT, GL_LINEAR);
 }
+
+
+void FramebufferMipmap::reinit() {
+	for (auto * f: fbo)
+		f->reinit();
+}