added detection entry for playable demo and some code differences

svn-id: r36044

4 files changed, 48 insertions, 21 deletions

diff --git a/engines/tucker/detection.cpp b/engines/tucker/detection.cpp
index f54342a516..57357ff504 100644
--- a/engines/tucker/detection.cpp
+++ b/engines/tucker/detection.cpp
@@ -87,6 +87,14 @@ static const Common::ADGameDescription tuckerGameDescriptions[] = {
 		Common::kPlatformPC,
 		Tucker::kGameFlagEncodedData
 	},
+	{
+		"tucker",
+		"Demo",
+		AD_ENTRY1s("infobar.txt", "010b055de42097b140d5bcb6e95a5c7c", 203),
+		Common::EN_ANY,
+		Common::kPlatformPC,
+		Common::ADGF_DEMO | Tucker::kGameFlagDemo,
+	},
 	AD_TABLE_END_MARKER
 };
 
@@ -103,11 +111,11 @@ static const Common::ADParams detectionParams = {
 
 static const Common::ADGameDescription tuckerDemoGameDescription = {
 	"tucker",
-	"Demo",
+	"Non-Interactive Demo",
 	AD_ENTRY1(0, 0),
 	Common::EN_ANY,
 	Common::kPlatformPC,
-	Common::ADGF_DEMO | Tucker::kGameFlagDemo
+	Common::ADGF_DEMO | Tucker::kGameFlagDemo | Tucker::kGameFlagIntroOnly
 };
 
 class TuckerMetaEngine : public Common::AdvancedMetaEngine {
diff --git a/engines/tucker/resource.cpp b/engines/tucker/resource.cpp
index 178b6fb793..d36024393c 100644
--- a/engines/tucker/resource.cpp
+++ b/engines/tucker/resource.cpp
@@ -342,7 +342,11 @@ void TuckerEngine::loadBudSpr(int startOffset) {
 			char filename[40];
 			switch (_flagsTable[137]) {
 			case 0:
-				sprintf(filename, "bud_%d.pcx", frame + 1);
+				if ((_gameFlags & kGameFlagDemo) != 0) {
+					sprintf(filename, "budl00_%d.pcx", frame + 1);
+				} else {
+					sprintf(filename, "bud_%d.pcx", frame + 1);
+				}
 				break;
 			case 1:
 				sprintf(filename, "peg_%d.pcx", frame + 1);
@@ -411,7 +415,8 @@ void TuckerEngine::loadCTable02(int fl) {
 		}
 		int start = 0;
 		_spriteAnimationsTable[entry].firstFrameIndex = i;
-		while (start != 999) {
+		// 9999 is also used as the end marker in the demo version
+		while (start != 999 && start != 9999) {
 			start = t.getNextInteger();
 			_spriteAnimationFramesTable[i] = start;
 			++i;
@@ -447,7 +452,7 @@ void TuckerEngine::loadLoc() {
 		copyLocBitmap(filename, 0, false);
 		Graphics::copyRect(_quadBackgroundGfxBuf + 89600, 320, _locationBackgroundGfxBuf, 640, 320, 140);
 	}
-	if (_locationNum == 1) {
+	if ((_gameFlags & kGameFlagDemo) == 0 && _locationNum == 1) {
 		_loadLocBufPtr = _quadBackgroundGfxBuf + 89600;
 		loadImage("rochpath.pcx", _loadLocBufPtr, 0);
 	}
@@ -477,7 +482,9 @@ void TuckerEngine::loadObj() {
 		return;
 	}
 	debug(2, "loadObj() partNum %d locationNum %d", _partNum, _locationNum);
-	handleNewPartSequence();
+	if ((_gameFlags & kGameFlagDemo) == 0) {
+		handleNewPartSequence();
+	}
 	_currentPartNum = _partNum;
 
 	char filename[40];
@@ -651,16 +658,20 @@ void TuckerEngine::loadData4() {
 
 void TuckerEngine::loadActionFile() {
 	char filename[40];
-	switch (_partNum) {
-	case 1:
-		strcpy(filename, "action1.c");
-		break;
-	case 2:
-		strcpy(filename, "action2.c");
-		break;
-	default:
-		strcpy(filename, "action3.c");
-		break;
+	if ((_gameFlags & kGameFlagDemo) != 0) {
+		strcpy(filename, "action.c");
+	} else {
+		switch (_partNum) {
+		case 1:
+			strcpy(filename, "action1.c");
+			break;
+		case 2:
+			strcpy(filename, "action2.c");
+			break;
+		default:
+			strcpy(filename, "action3.c");
+			break;
+		}
 	}
 	loadFile(filename, _loadTempBuf);
 
diff --git a/engines/tucker/tucker.cpp b/engines/tucker/tucker.cpp
index 84b430f7bd..2d17417b78 100644
--- a/engines/tucker/tucker.cpp
+++ b/engines/tucker/tucker.cpp
@@ -60,7 +60,7 @@ bool TuckerEngine::hasFeature(EngineFeature f) const {
 
 Common::Error TuckerEngine::go() {
 	handleIntroSequence();
-	if ((_gameFlags & kGameFlagDemo) == 0 && !shouldQuit()) {
+	if ((_gameFlags & kGameFlagIntroOnly) == 0 && !shouldQuit()) {
 		mainLoop();
 	}
 	return Common::kNoError;
@@ -130,7 +130,7 @@ void TuckerEngine::restart() {
 	_locationNum = 0;
 	_nextLocationNum = ConfMan.getInt("boot_param");
 	if (_nextLocationNum == 0) {
-		_nextLocationNum = kStartupLocation;
+		_nextLocationNum = (_gameFlags & kGameFlagDemo) == 0 ? kStartupLocationGame : kStartupLocationDemo;
 	}
 	_gamePaused = _gamePaused2 = false;
 	_gameDebug = false;
@@ -329,6 +329,10 @@ void TuckerEngine::mainLoop() {
 
 	openCompressedSoundFile();
 	loadCharSizeDta();
+	if ((_gameFlags & kGameFlagDemo) != 0) {
+		addObjectToInventory(30);
+		addObjectToInventory(12);
+	}
 	loadCharset();
 	loadPanel();
 	loadFile("infobar.txt", _infoBarBuf);
@@ -1523,7 +1527,9 @@ void TuckerEngine::drawData3() {
 void TuckerEngine::execData3PreUpdate() {
 	switch (_locationNum) {
 	case 1:
-		execData3PreUpdate_locationNum1();
+		if ((_gameFlags & kGameFlagDemo) == 0) {
+			execData3PreUpdate_locationNum1();
+		}
 		break;
 	case 2:
 		execData3PreUpdate_locationNum2();
diff --git a/engines/tucker/tucker.h b/engines/tucker/tucker.h
index 0050961827..c9decaa13a 100644
--- a/engines/tucker/tucker.h
+++ b/engines/tucker/tucker.h
@@ -175,7 +175,8 @@ enum {
 	kScreenHeight = 200,
 	kScreenPitch = 640,
 	kFadePaletteStep = 5,
-	kStartupLocation = 1,
+	kStartupLocationDemo = 9,
+	kStartupLocationGame = 1,
 	kDefaultCharSpeechSoundCounter = 1,
 	kMaxSoundVolume = 127,
 	kLastSaveSlot = 99
@@ -205,7 +206,8 @@ enum InputKey {
 enum GameFlag {
 	kGameFlagDemo = 1 << 0,
 	kGameFlagEncodedData = 1 << 1,
-	kGameFlagNoSubtitles = 1 << 2
+	kGameFlagNoSubtitles = 1 << 2,
+	kGameFlagIntroOnly = 1 << 3
 };
 
 inline int scaleMixerVolume(int volume, int max = 100) {