ZVISION: Make update screen delayed for updates.

3 files changed, 21 insertions, 2 deletions

diff --git a/engines/zvision/script_manager.cpp b/engines/zvision/script_manager.cpp
index e2397abc59..e30861aa98 100644
--- a/engines/zvision/script_manager.cpp
+++ b/engines/zvision/script_manager.cpp
@@ -462,6 +462,8 @@ void ScriptManager::do_changeLocation() {
 	assert(_nextLocation.world != 0);
 	debug(1, "Changing location to: %c %c %c %c %u", _nextLocation.world, _nextLocation.room, _nextLocation.node, _nextLocation.view, _nextLocation.offset);
 
+	_engine->setRenderDelay(2);
+
 	if (getStateValue(StateKey_World) != 'g' || getStateValue(StateKey_Room) != 'j') {
 		if (_nextLocation.world != 'g' || _nextLocation.room != 'j') {
 			setStateValue(StateKey_LastWorld, getStateValue(StateKey_World));
diff --git a/engines/zvision/zvision.cpp b/engines/zvision/zvision.cpp
index 39d61d9a89..65064d8a66 100644
--- a/engines/zvision/zvision.cpp
+++ b/engines/zvision/zvision.cpp
@@ -62,7 +62,8 @@ ZVision::ZVision(OSystem *syst, const ZVisionGameDescription *gameDesc)
 	  _saveManager(nullptr),
 	  _stringManager(nullptr),
 	  _cursorManager(nullptr),
-	  _aud_id(0) {
+	  _aud_id(0),
+	  _rendDelay(2) {
 
 	debug(1, "ZVision::ZVision");
 }
@@ -156,7 +157,10 @@ Common::Error ZVision::run() {
 		_renderManager->renderBackbufferToScreen();
 
 		// Update the screen
-		_system->updateScreen();
+		if (_rendDelay <= 0)
+			_system->updateScreen();
+		else
+			_rendDelay--;
 
 		// Calculate the frame delay based off a desired frame time
 		int delay = _desiredFrameTime - int32(_system->getMillis() - currentTime);
@@ -193,4 +197,12 @@ int ZVision::getAudioId() {
 	return _aud_id;
 }
 
+void ZVision::setRenderDelay(uint delay) {
+	_rendDelay = delay;
+}
+
+bool ZVision::canRender() {
+	return _rendDelay <= 0;
+}
+
 } // End of namespace ZVision
diff --git a/engines/zvision/zvision.h b/engines/zvision/zvision.h
index e7709283ae..05c5fcd3a4 100644
--- a/engines/zvision/zvision.h
+++ b/engines/zvision/zvision.h
@@ -109,6 +109,8 @@ private:
 
 	const Common::Rect _workingWindow_ZGI;
 	const Common::Rect _workingWindow_ZNM;
+
+	int _rendDelay;
 public:
 	uint32 getFeatures() const;
 	Common::Language getLanguage() const;
@@ -153,6 +155,9 @@ public:
 	Common::String generateSaveFileName(uint slot);
 	Common::String generateAutoSaveFileName();
 
+	void setRenderDelay(uint);
+	bool canRender();
+
 private:
 	void initialize();
 	void initFonts();