ZVISION: Implement Easter eggs and debug cheats

3 files changed, 130 insertions, 3 deletions

diff --git a/engines/zvision/core/events.cpp b/engines/zvision/core/events.cpp
index c977125f55..97565dd4d7 100644
--- a/engines/zvision/core/events.cpp
+++ b/engines/zvision/core/events.cpp
@@ -30,6 +30,8 @@
 #include "zvision/scripting/script_manager.h"
 #include "zvision/animation/rlf_animation.h"
 #include "zvision/core/menu.h"
+#include "zvision/utility/win_keys.h"
+#include "zvision/sound/zork_raw.h"
 
 #include "common/events.h"
 #include "common/system.h"
@@ -40,6 +42,86 @@
 
 namespace ZVision {
 
+void ZVision::cheatCodes(uint8 key) {
+	pushKeyToCheatBuf(key);
+
+	if (getGameId() == GID_GRANDINQUISITOR) {
+
+		if (checkCode("IMNOTDEAF")) {
+			// Unknow cheat
+			showDebugMsg(Common::String::format("IMNOTDEAF cheat or debug, not implemented"));
+		}
+
+		if (checkCode("3100OPB")) {
+			showDebugMsg(Common::String::format("Current location: %c%c%c%c",
+			                                    _scriptManager->getStateValue(StateKey_World),
+			                                    _scriptManager->getStateValue(StateKey_Room),
+			                                    _scriptManager->getStateValue(StateKey_Node),
+			                                    _scriptManager->getStateValue(StateKey_View)));
+		}
+
+		if (checkCode("KILLMENOW")) {
+			_scriptManager->changeLocation('g', 'j', 'd', 'e', 0);
+			_scriptManager->setStateValue(2201, 35);
+		}
+
+		if (checkCode("MIKESPANTS")) {
+			_scriptManager->changeLocation('g', 'j', 't', 'm', 0);
+		}
+	} else if (getGameId() == GID_NEMESIS) {
+
+		if (checkCode("CHLOE")) {
+			_scriptManager->changeLocation('t', 'm', '2', 'g', 0);
+			_scriptManager->setStateValue(224, 1);
+		}
+
+		if (checkCode("77MASSAVE")) {
+			showDebugMsg(Common::String::format("Current location: %c%c%c%c",
+			                                    _scriptManager->getStateValue(StateKey_World),
+			                                    _scriptManager->getStateValue(StateKey_Room),
+			                                    _scriptManager->getStateValue(StateKey_Node),
+			                                    _scriptManager->getStateValue(StateKey_View)));
+		}
+
+		if (checkCode("IDKFA")) {
+			_scriptManager->changeLocation('t', 'w', '3', 'f', 0);
+			_scriptManager->setStateValue(249, 1);
+		}
+
+		if (checkCode("309NEWDORMA")) {
+			_scriptManager->changeLocation('g', 'j', 'g', 'j', 0);
+		}
+
+		if (checkCode("HELLOSAILOR")) {
+			Location loc = _scriptManager->getCurrentLocation();
+			Audio::AudioStream *soundStream;
+			if (loc.world == 'v' && loc.room == 'b' && loc.node == '1' && loc.view == '0') {
+				soundStream = makeRawZorkStream("v000hpta.raw", this);
+			} else {
+				soundStream = makeRawZorkStream("v000hnta.raw", this);
+			}
+			Audio::SoundHandle handle;
+			_mixer->playStream(Audio::Mixer::kPlainSoundType, &handle, soundStream);
+		}
+	}
+
+	if (checkCode("FRAME"))
+		showDebugMsg(Common::String::format("FPS: ???, not implemented"));
+
+	if (checkCode("XYZZY"))
+		_scriptManager->setStateValue(StateKey_DebugCheats, 1 - _scriptManager->getStateValue(StateKey_DebugCheats));
+
+	if (checkCode("COMPUTERARCH"))
+		showDebugMsg(Common::String::format("COMPUTERARCH: var-viewer not implemented"));
+
+	if (_scriptManager->getStateValue(StateKey_DebugCheats) == 1)
+		if (checkCode("GO????"))
+			_scriptManager->changeLocation(getBufferedKey(3),
+			                               getBufferedKey(2),
+			                               getBufferedKey(1),
+			                               getBufferedKey(0), 0);
+}
+
 void ZVision::processEvents() {
 	while (_eventMan->pollEvent(_event)) {
 		switch (_event.type) {
@@ -72,7 +154,7 @@ void ZVision::processEvents() {
 			onMouseMove(_event.mouse);
 			break;
 
-		case Common::EVENT_KEYDOWN:
+		case Common::EVENT_KEYDOWN: {
 			switch (_event.kbd.keycode) {
 			case Common::KEYCODE_d:
 				if (_event.kbd.hasFlags(Common::KBD_CTRL)) {
@@ -89,8 +171,14 @@ void ZVision::processEvents() {
 				break;
 			}
 
+			uint8 vkKey = VKkey(_event.kbd.keycode);
+
+			_scriptManager->setStateValue(StateKey_KeyPress, vkKey);
+
 			_scriptManager->addEvent(_event);
-			break;
+			cheatCodes(vkKey);
+		}
+		break;
 		case Common::EVENT_KEYUP:
 			_scriptManager->addEvent(_event);
 			break;
diff --git a/engines/zvision/zvision.cpp b/engines/zvision/zvision.cpp
index 0b03cc351d..3518e01d68 100644
--- a/engines/zvision/zvision.cpp
+++ b/engines/zvision/zvision.cpp
@@ -100,6 +100,8 @@ ZVision::ZVision(OSystem *syst, const ZVisionGameDescription *gameDesc)
 	  _velocity(0) {
 
 	debug(1, "ZVision::ZVision");
+
+	memset(_cheatBuff, 0, sizeof(_cheatBuff));
 }
 
 ZVision::~ZVision() {
@@ -472,6 +474,34 @@ bool ZVision::ifQuit() {
 	}
 	return false;
 }
+
+void ZVision::pushKeyToCheatBuf(uint8 key) {
+	for (int i = 0; i < KEYBUF_SIZE - 1; i++)
+		_cheatBuff[i] = _cheatBuff[i + 1];
+
+	_cheatBuff[KEYBUF_SIZE - 1] = key;
+}
+
+bool ZVision::checkCode(const char *code) {
+	int codeLen = strlen(code);
+
+	if (codeLen > KEYBUF_SIZE)
+		return false;
+
+	for (int i = 0; i < codeLen; i++)
+		if (code[i] != _cheatBuff[KEYBUF_SIZE - codeLen + i] && code[i] != '?')
+			return false;
+
+	return true;
+}
+
+uint8 ZVision::getBufferedKey(uint8 pos) {
+	if (pos >= KEYBUF_SIZE)
+		return 0;
+	else
+		return _cheatBuff[KEYBUF_SIZE - pos - 1];
+}
+
 void ZVision::showDebugMsg(const Common::String &msg, int16 delay) {
 	uint16 msgid = _renderManager->createSubArea();
 	_renderManager->updateSubArea(msgid, msg);
diff --git a/engines/zvision/zvision.h b/engines/zvision/zvision.h
index 3c9e26b5ec..041a8574a6 100644
--- a/engines/zvision/zvision.h
+++ b/engines/zvision/zvision.h
@@ -85,7 +85,9 @@ private:
 		WORKING_WINDOW_HEIGHT = 344,
 
 		ROTATION_SCREEN_EDGE_OFFSET = 60,
-		MAX_ROTATION_SPEED = 400 // Pixels per second
+		MAX_ROTATION_SPEED = 400, // Pixels per second
+
+		KEYBUF_SIZE = 20
 	};
 
 	Console *_console;
@@ -122,6 +124,8 @@ private:
 	int _rendDelay;
 	int16 _velocity;
 	bool _halveDelay;
+
+	uint8 _cheatBuff[KEYBUF_SIZE];
 public:
 	uint32 getFeatures() const;
 	Common::Language getLanguage() const;
@@ -205,6 +209,11 @@ private:
 	void updateRotation();
 
 	void registerDefaultSettings();
+
+	void cheatCodes(uint8 key);
+	void pushKeyToCheatBuf(uint8 key);
+	bool checkCode(const char *code);
+	uint8 getBufferedKey(uint8 pos);
 };
 
 } // End of namespace ZVision