From b2d2bd6f2d4e33ffe545046540a386253d43f8b3 Mon Sep 17 00:00:00 2001
From: Paul Gilbert
Date: Wed, 2 Jan 2008 03:36:19 +0000
Subject: Room backgrounds now display in EGA mode

svn-id: r30138
---
 engines/lure/room.cpp    | 44 +++++++++++++++++++++++++++++++++++---------
 engines/lure/room.h      |  2 ++
 engines/lure/surface.cpp | 20 ++++++++++++++++----
 engines/lure/surface.h   |  1 +
 4 files changed, 54 insertions(+), 13 deletions(-)

diff --git a/engines/lure/room.cpp b/engines/lure/room.cpp
index 6576420f24..1252879659 100644
--- a/engines/lure/room.cpp
+++ b/engines/lure/room.cpp
@@ -37,7 +37,7 @@ static Room *int_room;
 
 RoomLayer::RoomLayer(uint16 screenId, bool backgroundLayer): 
 		Surface(FULL_SCREEN_WIDTH, FULL_SCREEN_HEIGHT) {
-	loadScreen(screenId);	
+	Disk &disk = Disk::getReference();
 	byte *screenData = data().data();
 	int cellY;
 	int cellIndex = 0;
@@ -45,6 +45,27 @@ RoomLayer::RoomLayer(uint16 screenId, bool backgroundLayer):
 	// Reset all the cells to unused
 	Common::set_to((uint8 *) _cells, (uint8 *) _cells + GRID_SIZE, 0xff);
 
+	// Load up the screen data
+	MemoryBlock *rawData = disk.getEntry(screenId);
+	loadScreen(rawData);
+
+	uint16 v = READ_BE_UINT16(rawData->data());
+	bool is5Bit = (v & 0xfffe) == 0x140;
+	delete rawData;
+
+	_paletteId = (screenId & 0xffe0) - 1;
+	if (is5Bit) {
+		uint16 roomNumber = Room::getReference().roomNumber();
+
+		if (roomNumber == 6)
+			_paletteId = 0x45ff;
+		else if (roomNumber == 49)
+			_paletteId = 0xf1ff;
+		else {
+			_paletteId = 0x40ff;
+		}
+	}
+
 	// Loop through each cell of the screen
 	for (cellY = 0; cellY < NUM_VERT_RECTS; ++cellY) {
 		for (int cellX = 0; cellX < NUM_HORIZ_RECTS; ++cellX) {
@@ -522,6 +543,7 @@ void Room::setRoomNumber(uint16 newRoomNumber, bool showOverlay) {
 	Resources &res = Resources::getReference();
 	Game &game = Game::getReference();
 	Mouse &mouse = Mouse::getReference();
+	bool isEGA = LureEngine::getReference().isEGA();
 
 	mouse.pushCursorNum(CURSOR_DISK);
 
@@ -560,7 +582,6 @@ void Room::setRoomNumber(uint16 newRoomNumber, bool showOverlay) {
 	_numLayers = _roomData->numLayers;
 	if (showOverlay) ++_numLayers;
 
-	uint16 paletteId = (_roomData->layers[0] & 0xffe0) - 1;
 	for (uint8 layerNum = 0; layerNum < _numLayers; ++layerNum) 
 		_layers[layerNum] = new RoomLayer(_roomData->layers[layerNum],
 			layerNum == 0);
@@ -569,11 +590,15 @@ void Room::setRoomNumber(uint16 newRoomNumber, bool showOverlay) {
 	layersPostProcess();
 
 	// Generate the palette for the room that will be faded in
-	//Palette p(MAIN_PALETTE_SIZE, NULL, RGB64);
-	Palette p(GAME_PALETTE_RESOURCE_ID);
-	Palette tempPalette(paletteId);
-	p.copyFrom(&tempPalette);
-	res.insertPaletteSubset(p);
+	Palette *p;
+	if (isEGA) {
+		p = new Palette(_layers[0]->paletteId());
+	} else {
+		p = new Palette(GAME_PALETTE_RESOURCE_ID);
+		Palette tempPalette(_layers[0]->paletteId());
+		p->copyFrom(&tempPalette);
+		res.insertPaletteSubset(*p);
+	}
 
 	// Set the new room number
 	res.fieldList().setField(ROOM_NUMBER, newRoomNumber);
@@ -603,11 +628,12 @@ void Room::setRoomNumber(uint16 newRoomNumber, bool showOverlay) {
 	_screen.update();
 
 	if (fadeFlag)
-		_screen.paletteFadeIn(&p);
+		_screen.paletteFadeIn(p);
 	else
-		_screen.setPalette(&p);
+		_screen.setPalette(p);
 
 	mouse.popCursor();
+	delete p;
 }
 
 // checkCursor
diff --git a/engines/lure/room.h b/engines/lure/room.h
index e208698a2e..057f47842e 100644
--- a/engines/lure/room.h
+++ b/engines/lure/room.h
@@ -48,6 +48,7 @@ namespace Lure {
 class RoomLayer: public Surface {
 private:
 	byte _cells[FULL_VERT_RECTS][FULL_HORIZ_RECTS];
+	uint16 _paletteId;
 public:
 	RoomLayer(uint16 screenId, bool backgroundLayer);
 	bool isOccupied(byte cellX, byte cellY) {
@@ -59,6 +60,7 @@ public:
 	void setCell(byte cellX, byte cellY, byte value) {
 		_cells[cellY][cellX] = value;
 	}
+	uint16 paletteId() { return _paletteId; }
 };
 
 enum CursorState {CS_NONE, CS_ACTION, CS_SEQUENCE, CS_TALKING, CS_BUMPED};
diff --git a/engines/lure/surface.cpp b/engines/lure/surface.cpp
index 30c633faf4..bc4eda9986 100644
--- a/engines/lure/surface.cpp
+++ b/engines/lure/surface.cpp
@@ -106,14 +106,26 @@ Surface::~Surface() {
 
 void Surface::loadScreen(uint16 resourceId) {
 	MemoryBlock *rawData = Disk::getReference().getEntry(resourceId);
-	PictureDecoder decoder;
-	MemoryBlock *tmpScreen = decoder.decode(rawData, FULL_SCREEN_HEIGHT * FULL_SCREEN_WIDTH + 1);
+	loadScreen(rawData);
 	delete rawData;
-	empty();
+}
+
+void Surface::loadScreen(MemoryBlock *rawData) {
+	PictureDecoder decoder;
+	uint16 v = READ_BE_UINT16(rawData->data());
+	bool is5Bit = (v & 0xfffe) == 0x140;
+	MemoryBlock *tmpScreen;
 
+	if (is5Bit) 
+		// 5-bit decompression
+		tmpScreen = decoder.egaDecode(rawData, FULL_SCREEN_HEIGHT * FULL_SCREEN_WIDTH + 1);
+	else
+		// VGA decompression
+		tmpScreen = decoder.vgaDecode(rawData, FULL_SCREEN_HEIGHT * FULL_SCREEN_WIDTH + 1);
+
+	empty();
 	_data->copyFrom(tmpScreen, 0, MENUBAR_Y_SIZE * FULL_SCREEN_WIDTH, 
 		(FULL_SCREEN_HEIGHT - MENUBAR_Y_SIZE) * FULL_SCREEN_WIDTH);
-	
 	delete tmpScreen;
 }
 
diff --git a/engines/lure/surface.h b/engines/lure/surface.h
index 71a184be87..789fec6f14 100644
--- a/engines/lure/surface.h
+++ b/engines/lure/surface.h
@@ -52,6 +52,7 @@ public:
 	MemoryBlock &data() { return *_data; }
 
 	void loadScreen(uint16 resourceId);
+	void loadScreen(MemoryBlock *data);
 	int writeChar(uint16 x, uint16 y, uint8 ascii, bool transparent, uint8 colour);
 	void writeString(uint16 x, uint16 y, Common::String line, bool transparent,
 		uint8 colour = DIALOG_TEXT_COLOUR, bool varLength = true);
-- 
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