Merge branch 'master' of https://github.com/scummvm/scummvm into mortevielle

Conflicts:
	engines/engines.mk

1 files changed, 1933 insertions, 0 deletions

diff --git a/engines/hopkins/graphics.cpp b/engines/hopkins/graphics.cpp
new file mode 100644
index 0000000000..ebc5cfa8da
--- /dev/null
+++ b/engines/hopkins/graphics.cpp
@@ -0,0 +1,1933 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "hopkins/graphics.h"
+
+#include "hopkins/files.h"
+#include "hopkins/globals.h"
+#include "hopkins/hopkins.h"
+
+#include "common/system.h"
+#include "graphics/palette.h"
+#include "graphics/decoders/pcx.h"
+#include "common/file.h"
+#include "common/rect.h"
+#include "engines/util.h"
+
+namespace Hopkins {
+
+GraphicsManager::GraphicsManager(HopkinsEngine *vm) {
+	_vm = vm;
+
+	_lockCounter = 0;
+	_initGraphicsFl = false;
+	_screenWidth = _screenHeight = 0;
+	_screenLineSize = 0;
+	_palettePixels = NULL;
+	_lineNbr = 0;
+	_videoPtr = NULL;
+	_scrollOffset = 0;
+	_scrollPosX = 0;
+	_largeScreenFl = false;
+	_oldScrollPosX = 0;
+	_backBuffer = NULL;
+	_frontBuffer = NULL;
+	_screenBuffer = NULL;
+	_backupScreen = NULL;
+	_showDirtyRects = false;
+
+	_lineNbr2 = 0;
+	_enlargedX = _enlargedY = 0;
+	_enlargedXFl = _enlargedYFl = false;
+	_fadeDefaultSpeed = 15;
+	_fadingFl = false;
+	_skipVideoLockFl = false;
+	_scrollStatus = 0;
+	_minX = 0;
+	_minY = 20;
+	_maxX = SCREEN_WIDTH * 2;
+	_maxY = SCREEN_HEIGHT - 20;
+	_posXClipped = _posYClipped = 0;
+	_clipX1 = _clipY1 = 0;
+	_clipFl = false;
+	_reduceX = _reducedY = 0;
+	_zoomOutFactor = 0;
+	_width = 0;
+	_specialWidth = 0;
+	_showZones = false;
+	_showLines = false;
+
+	Common::fill(&_paletteBuffer[0], &_paletteBuffer[PALETTE_SIZE * 2], 0);
+	Common::fill(&_colorTable[0], &_colorTable[PALETTE_EXT_BLOCK_SIZE], 0);
+	Common::fill(&_palette[0], &_palette[PALETTE_EXT_BLOCK_SIZE], 0);
+	Common::fill(&_oldPalette[0], &_oldPalette[PALETTE_EXT_BLOCK_SIZE], 0);
+
+	if (_vm->getIsDemo()) {
+		if (_vm->getPlatform() == Common::kPlatformLinux)
+			// CHECKME: Should be false?
+			_manualScroll = true;
+		else
+			_manualScroll = false;
+		_scrollSpeed = 16;
+	} else {
+		_manualScroll = false;
+		_scrollSpeed = 32;
+	}
+
+	_noFadingFl = false;
+}
+
+GraphicsManager::~GraphicsManager() {
+	_vm->_globals->freeMemory(_backBuffer);
+	_vm->_globals->freeMemory(_frontBuffer);
+	_vm->_globals->freeMemory(_screenBuffer);
+	_vm->_globals->freeMemory(_backupScreen);
+}
+
+void GraphicsManager::setGraphicalMode(int width, int height) {
+	if (!_initGraphicsFl) {
+		Graphics::PixelFormat pixelFormat16(2, 5, 6, 5, 0, 11, 5, 0, 0);
+		initGraphics(width, height, true, &pixelFormat16);
+
+		// Init surfaces
+		_backBuffer = _vm->_globals->allocMemory(SCREEN_WIDTH * 2 * SCREEN_HEIGHT);
+		_frontBuffer = _vm->_globals->allocMemory(SCREEN_WIDTH * 2 * SCREEN_HEIGHT);
+		_screenBuffer = _vm->_globals->allocMemory(SCREEN_WIDTH * 2 * SCREEN_HEIGHT);
+
+		_videoPtr = NULL;
+		_screenWidth = width;
+		_screenHeight = height;
+
+		_screenLineSize = SCREEN_WIDTH * 2;
+		_palettePixels = _paletteBuffer;
+		_lineNbr = width;
+
+		_initGraphicsFl = true;
+	} else {
+		error("setGraphicalMode called multiple times");
+	}
+}
+
+/**
+ * (try to) Lock Screen
+ */
+void GraphicsManager::lockScreen() {
+	if (!_skipVideoLockFl) {
+		if (_lockCounter++ == 0) {
+			_videoPtr = _screenBuffer;
+			_screenLineSize = SCREEN_WIDTH * 2;
+		}
+	}
+}
+
+/**
+ * (try to) Unlock Screen
+ */
+void GraphicsManager::unlockScreen() {
+	assert(_videoPtr);
+	if (--_lockCounter == 0) {
+		_videoPtr = NULL;
+	}
+}
+
+/**
+ * Clear Screen
+ */
+void GraphicsManager::clearScreen() {
+	lockScreen();
+	assert(_videoPtr);
+
+	Common::fill(_screenBuffer, _screenBuffer + _screenLineSize * _screenHeight, 0);
+	addRefreshRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
+	unlockScreen();
+}
+
+void GraphicsManager::clearVesaScreen() {
+	Common::fill(_backBuffer, _backBuffer + _screenLineSize * _screenHeight, 0);
+	Common::fill(_frontBuffer, _frontBuffer + _screenLineSize * _screenHeight, 0);
+	addDirtyRect(Common::Rect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT));
+}
+
+/**
+ * Load Image
+ */
+void GraphicsManager::loadImage(const Common::String &file) {
+	Common::String filename	= Common::String::format("%s.PCX", file.c_str());
+	loadScreen(filename);
+	initColorTable(165, 170, _palette);
+}
+
+/**
+ * Load VGA Image
+ */
+void GraphicsManager::loadVgaImage(const Common::String &file) {
+	setScreenWidth(SCREEN_WIDTH);
+	clearScreen();
+	loadPCX320(_backBuffer, file, _palette);
+	memcpy(_frontBuffer, _backBuffer, 64000);
+	setScreenWidth(320);
+	_maxX = 320;
+
+	copy16bFromSurfaceScaleX2(_frontBuffer);
+	addRefreshRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
+
+	fadeInBreakout();
+}
+
+/**
+ * Load Screen
+ */
+void GraphicsManager::loadScreen(const Common::String &file) {
+	Common::File f;
+	assert(!_videoPtr);
+
+	bool flag = true;
+	bool fileFoundFl = false;
+	_vm->_fileIO->searchCat(file, RES_PIC, fileFoundFl);
+	if (!fileFoundFl) {
+		if (!f.open(file))
+			error("loadScreen - %s", file.c_str());
+
+		f.seek(0, SEEK_END);
+		f.close();
+		flag = false;
+	}
+
+	scrollScreen(0);
+	loadPCX640(_backBuffer, file, _palette, flag);
+
+	_scrollPosX = 0;
+	_oldScrollPosX = 0;
+	clearPalette();
+
+	if (!_largeScreenFl) {
+		setScreenWidth(SCREEN_WIDTH);
+		_maxX = SCREEN_WIDTH;
+		clearScreen();
+
+		display8BitRect(_backBuffer, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0);
+	} else {
+		setScreenWidth(SCREEN_WIDTH * 2);
+		_maxX = SCREEN_WIDTH * 2;
+		clearScreen();
+
+		if (_manualScroll)
+			display8BitRect(_backBuffer, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0);
+	}
+
+	memcpy(_frontBuffer, _backBuffer, SCREEN_WIDTH * 2 * SCREEN_HEIGHT);
+}
+
+void GraphicsManager::initColorTable(int minIndex, int maxIndex, byte *palette) {
+	for (int idx = 0; idx < 256; ++idx)
+		_colorTable[idx] = idx;
+
+	translateSurface(_colorTable, palette, 256, minIndex, maxIndex);
+
+	for (int idx = 0; idx < 256; ++idx) {
+		byte v = _colorTable[idx];
+		if (v > 27 || !v)
+			_colorTable[idx] = 0;
+	}
+
+	_colorTable[0] = 1;
+}
+
+/**
+ * Scroll Screen
+ */
+void GraphicsManager::scrollScreen(int amount) {
+	int result = CLIP(amount, 0, SCREEN_WIDTH);
+	_vm->_events->_startPos.x = result;
+	_scrollOffset = result;
+	_scrollPosX = result;
+}
+
+void GraphicsManager::translateSurface(byte *destP, const byte *srcP, int count, int minThreshold, int maxThreshold) {
+	byte *destPosP = destP;
+	for (int idx = 0; idx < count; ++idx) {
+		int palIndex = *destPosP;
+		int srcOffset = 3 * palIndex;
+		int col1 = srcP[srcOffset] + srcP[srcOffset + 1] + srcP[srcOffset + 2];
+
+		for (int idx2 = 0; idx2 < 38; ++idx2) {
+			srcOffset = 3 * idx2;
+			int col2 = srcP[srcOffset] + srcP[srcOffset + 1] + srcP[srcOffset + 2];
+
+			col2 += minThreshold;
+			if (col2 < col1)
+				continue;
+
+			col2 -= maxThreshold;
+			if (col2 > col1)
+				continue;
+
+			*destPosP = (idx2 == 0) ? 1 : idx2;
+			break;
+		}
+		destPosP++;
+	}
+}
+
+void GraphicsManager::fillSurface(byte *surface, byte *col, int size) {
+	byte dataVal;
+
+	byte *dataP = surface;
+	for (int count = size - 1; count; count--){
+		dataVal = *dataP;
+		*dataP = col[dataVal];
+		dataP++;
+	}
+}
+
+void GraphicsManager::loadPCX640(byte *surface, const Common::String &file, byte *palette, bool typeFlag) {
+	Common::File f;
+	Graphics::PCXDecoder pcxDecoder;
+
+	// Clear the passed surface
+	memset(surface, 0, SCREEN_WIDTH * 2 * SCREEN_HEIGHT);
+
+	if (typeFlag) {
+		// Load PCX from within the PIC resource
+		if (!f.open("PIC.RES"))
+			error("Error opening PIC.RES.");
+		f.seek(_vm->_fileIO->_catalogPos);
+	} else {
+		// Load stand alone PCX file
+		if (!f.open(file))
+		  error("Error opening PCX %s.", file.c_str());
+	}
+
+	// Decode the PCX
+	if (!pcxDecoder.loadStream(f))
+		error("Error decoding PCX %s", file.c_str());
+
+	const Graphics::Surface *s = pcxDecoder.getSurface();
+
+	// Copy out the dimensions and pixels of the decoded surface
+	_largeScreenFl = s->w > SCREEN_WIDTH;
+	Common::copy((byte *)s->pixels, (byte *)s->pixels + (s->pitch * s->h), surface);
+
+	// Copy out the palette
+	const byte *palSrc = pcxDecoder.getPalette();
+	Common::copy((const byte *)palSrc, (const byte *)palSrc + PALETTE_BLOCK_SIZE, palette);
+
+	f.close();
+}
+
+void GraphicsManager::loadPCX320(byte *surface, const Common::String &file, byte *palette) {
+	Common::File f;
+	if (!f.open(file))
+		error("File not found - %s", file.c_str());
+
+	size_t filesize = f.size();
+
+	f.read(surface, 128);
+	int imageSize = filesize - 896;
+	byte *ptr = _vm->_globals->allocMemory(65024);
+	size_t curBufSize;
+	int imageNumb;
+	int imageDataSize;
+	if (imageSize >= 64000) {
+		imageNumb = imageSize / 64000 + 1;
+		imageDataSize = abs(64000 * (imageSize / 64000) - imageSize);
+		f.read(ptr, 64000);
+		curBufSize = 64000;
+	} else {
+		imageNumb = 1;
+		imageDataSize = imageSize;
+		f.read(ptr, imageSize);
+		curBufSize = imageSize;
+	}
+	imageNumb--;
+	size_t curByteIdx = 0;
+	for (int i = 0; i < 64000; i++) {
+		if (curByteIdx == curBufSize) {
+			curByteIdx = 0;
+			--imageNumb;
+			curBufSize = 64000;
+			if (!imageNumb)
+				curBufSize = imageDataSize;
+			f.read(ptr, curBufSize);
+		}
+		byte curByte = ptr[curByteIdx++];
+		if (curByte > 192) {
+			int repeatCount = curByte - 192;
+			if (curByteIdx == curBufSize) {
+				curByteIdx = 0;
+				--imageNumb;
+				curBufSize = 64000;
+				if (imageNumb == 1)
+					curBufSize = imageDataSize;
+				f.read(ptr, curBufSize);
+			}
+			curByte = ptr[curByteIdx++];
+			for (; repeatCount; repeatCount--)
+				surface[i++] = curByte;
+
+			--i;
+		} else {
+			surface[i] = curByte;
+		}
+	}
+
+	f.seek(filesize - 768);
+	f.read(palette, 768);
+	f.close();
+
+	_vm->_globals->freeMemory(ptr);
+}
+
+// Clear Palette
+void GraphicsManager::clearPalette() {
+	// As weird as it sounds, this is what the original Linux executable does,
+	// and not a full array clear.
+	_paletteBuffer[0] = 0;
+}
+
+void GraphicsManager::setScreenWidth(int pitch) {
+	_lineNbr = _lineNbr2 = pitch;
+}
+
+/**
+ * Copies data from a 8-bit palette surface into the 16-bit screen
+ */
+void GraphicsManager::display8BitRect(const byte *surface, int xs, int ys, int width, int height, int destX, int destY) {
+	lockScreen();
+
+	assert(_videoPtr);
+	const byte *srcP = xs + _lineNbr2 * ys + surface;
+	byte *destP = (byte *)_videoPtr + destX * 2 + _screenLineSize * destY;
+
+	for (int yp = 0; yp < height; ++yp) {
+		// Copy over the line, using the source pixels as lookups into the pixels palette
+		const byte *lineSrcP = srcP;
+		byte *lineDestP = destP;
+
+		for (int xp = 0; xp < width; ++xp) {
+			lineDestP[0] = _palettePixels[lineSrcP[0] * 2];
+			lineDestP[1] = _palettePixels[(lineSrcP[0] * 2) + 1];
+			lineDestP += 2;
+			lineSrcP++;
+		}
+		// Move to the start of the next line
+		srcP += _lineNbr2;
+		destP += _screenLineSize;
+	}
+
+	unlockScreen();
+	addRefreshRect(destX, destY, destX + width, destY + height);
+}
+
+void GraphicsManager::displayScaled8BitRect(const byte *surface, int xp, int yp, int width, int height, int destX, int destY) {
+	int xCtr;
+	const byte *palette;
+	int savedXCount;
+	byte *loopDestP;
+	const byte *loopSrcP;
+	int yCtr;
+
+	assert(_videoPtr);
+	const byte *srcP = surface + xp + 320 * yp;
+	byte *destP = (byte *)_videoPtr + 30 * _screenLineSize + destX + destX + destX + destX + _screenLineSize * 2 * destY;
+	int yCount = height;
+	int xCount = width;
+
+	do {
+		yCtr = yCount;
+		xCtr = xCount;
+		loopSrcP = srcP;
+		loopDestP = destP;
+		savedXCount = xCount;
+		palette = _palettePixels;
+
+		do {
+			destP[0] = destP[2] = destP[_screenLineSize] = destP[_screenLineSize + 2] = palette[2 * srcP[0]];
+			destP[1] = destP[3] = destP[_screenLineSize + 1] = destP[_screenLineSize + 3] = palette[(2 * srcP[0]) + 1];
+			++srcP;
+			destP += 4;
+			--xCtr;
+		} while (xCtr);
+
+		xCount = savedXCount;
+		destP = loopDestP + _screenLineSize * 2;
+		srcP = loopSrcP + 320;
+		yCount = yCtr - 1;
+	} while (yCtr != 1);
+
+	addRefreshRect(destX, destY, destX + width, destY + width);
+}
+
+/**
+ * Fade in. the step number is determine by parameter.
+ */
+void GraphicsManager::fadeIn(const byte *palette, int step, const byte *surface) {
+	byte palData2[PALETTE_BLOCK_SIZE];
+	int fadeStep;
+	if (step > 1)
+		fadeStep = step;
+	else
+		fadeStep = 2;
+	// Initialize temporary palette
+	Common::fill(&palData2[0], &palData2[PALETTE_BLOCK_SIZE], 0);
+
+	// Set current palette to black
+	setPaletteVGA256(palData2);
+
+	// Loop through fading in the palette
+	for (int fadeIndex = 0; fadeIndex < fadeStep; ++fadeIndex) {
+		for (int palOffset = 0; palOffset < PALETTE_BLOCK_SIZE; palOffset += 3) {
+			palData2[palOffset + 0] = fadeIndex * palette[palOffset + 0] / (fadeStep - 1);
+			palData2[palOffset + 1] = fadeIndex * palette[palOffset + 1] / (fadeStep - 1);
+			palData2[palOffset + 2] = fadeIndex * palette[palOffset + 2] / (fadeStep - 1);
+		}
+
+		// Set the transition palette and refresh the screen
+		setPaletteVGA256(palData2);
+		display8BitRect(surface, _vm->_events->_startPos.x, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0);
+		updateScreen();
+
+		// Added a delay in order to see the fading
+		_vm->_events->delay(20);
+	}
+
+	// Set the final palette
+	setPaletteVGA256(palette);
+
+	// Refresh the screen
+	display8BitRect(surface, _vm->_events->_startPos.x, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0);
+	updateScreen();
+}
+
+/**
+ * Fade out. the step number is determine by parameter.
+ */
+void GraphicsManager::fadeOut(const byte *palette, int step, const byte *surface) {
+	byte palData[PALETTE_BLOCK_SIZE];
+	if ((step > 1) && (palette) && (!_vm->_events->_escKeyFl)) {
+		int fadeStep = step;
+		for (int fadeIndex = 0; fadeIndex < fadeStep; fadeIndex++) {
+			for (int palOffset = 0; palOffset < PALETTE_BLOCK_SIZE; palOffset += 3) {
+				palData[palOffset + 0] = (fadeStep - fadeIndex - 1) * palette[palOffset + 0] / (fadeStep - 1);
+				palData[palOffset + 1] = (fadeStep - fadeIndex - 1) * palette[palOffset + 1] / (fadeStep - 1);
+				palData[palOffset + 2] = (fadeStep - fadeIndex - 1) * palette[palOffset + 2] / (fadeStep - 1);
+			}
+
+			setPaletteVGA256(palData);
+			display8BitRect(surface, _vm->_events->_startPos.x, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0);
+			updateScreen();
+
+			_vm->_events->delay(20);
+		}
+	}
+
+	// No initial palette, or end of fading
+	for (int i = 0; i < PALETTE_BLOCK_SIZE; i++)
+		palData[i] = 0;
+
+	setPaletteVGA256(palData);
+	display8BitRect(surface, _vm->_events->_startPos.x, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0);
+
+	updateScreen();
+}
+
+/**
+ * Short fade in. The step number is 1, the default step number is also set to 1.
+ */
+void GraphicsManager::fadeInShort() {
+	_fadeDefaultSpeed = 1;
+	fadeIn(_palette, 1, (const byte *)_frontBuffer);
+}
+
+/**
+ * Short fade out. The step number is 1, the default step number is also set to 1.
+ */
+void GraphicsManager::fadeOutShort() {
+	_fadeDefaultSpeed = 1;
+	fadeOut(_palette, 1, (const byte *)_frontBuffer);
+}
+
+/**
+ * Long fade in. The step number is 20, the default step number is also set to 15.
+ */
+void GraphicsManager::fadeInLong() {
+	_fadeDefaultSpeed = 15;
+	fadeIn(_palette, 20, (const byte *)_frontBuffer);
+}
+
+/**
+ * Long fade out. The step number is 20, the default step number is also set to 15.
+ */
+void GraphicsManager::fadeOutLong() {
+	_fadeDefaultSpeed = 15;
+	fadeOut(_palette, 20, (const byte *)_frontBuffer);
+}
+
+/**
+ * Fade in. The step number used is the default step number.
+ */
+void GraphicsManager::fadeInDefaultLength(const byte *surface) {
+	assert(surface);
+	fadeIn(_palette, _fadeDefaultSpeed, surface);
+}
+
+/**
+ * Fade out. The step number used is the default step number.
+ */
+void GraphicsManager::fadeOutDefaultLength(const byte *surface) {
+	assert(surface);
+	fadeOut(_palette, _fadeDefaultSpeed, surface);
+}
+
+/**
+ * Fade in used by for the breakout mini-game
+ */
+void GraphicsManager::fadeInBreakout() {
+	setPaletteVGA256(_palette);
+	copy16bFromSurfaceScaleX2(_frontBuffer);
+	updateScreen();
+}
+
+/**
+ * Fade out used by for the breakout mini-game
+ */
+void GraphicsManager::fadeOutBreakout() {
+	byte palette[PALETTE_EXT_BLOCK_SIZE];
+
+	memset(palette, 0, PALETTE_EXT_BLOCK_SIZE);
+	setPaletteVGA256(palette);
+	copy16bFromSurfaceScaleX2(_frontBuffer);
+	updateScreen();
+}
+
+void GraphicsManager::setPaletteVGA256(const byte *palette) {
+	changePalette(palette);
+}
+
+void GraphicsManager::setPaletteVGA256WithRefresh(const byte *palette, const byte *surface) {
+	changePalette(palette);
+	display8BitRect(surface, _vm->_events->_startPos.x, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0);
+	updateScreen();
+}
+
+void GraphicsManager::setColorPercentage(int palIndex, int r, int g, int b) {
+	int palOffset = 3 * palIndex;
+	_palette[palOffset] = 255 * r / 100;
+	_palette[palOffset + 1] = 255 * g / 100;
+	_palette[palOffset + 2] = 255 * b / 100;
+}
+
+void GraphicsManager::setColorPercentage2(int palIndex, int r, int g, int b) {
+	int rv = 255 * r / 100;
+	int gv = 255 * g / 100;
+	int bv = 255 * b / 100;
+
+	int palOffset = 3 * palIndex;
+	_palette[palOffset] = rv;
+	_palette[palOffset + 1] = gv;
+	_palette[palOffset + 2] = bv;
+
+	WRITE_UINT16(&_paletteBuffer[2 * palIndex], mapRGB(rv, gv, bv));
+}
+
+void GraphicsManager::changePalette(const byte *palette) {
+	const byte *srcP = &palette[0];
+	for (int idx = 0; idx < PALETTE_SIZE; ++idx, srcP += 3) {
+		WRITE_UINT16(&_paletteBuffer[2 * idx], mapRGB(srcP[0], srcP[1], srcP[2]));
+	}
+}
+
+uint16 GraphicsManager::mapRGB(byte r, byte g, byte b) {
+	Graphics::PixelFormat format = g_system->getScreenFormat();
+
+	return (r >> format.rLoss) << format.rShift
+			| (g >> format.gLoss) << format.gShift
+			| (b >> format.bLoss) << format.bShift;
+}
+
+void GraphicsManager::updateScreen() {
+	// Display any aras of the screen that need refreshing
+	displayDirtyRects();
+	displayRefreshRects();
+
+	// Extra checks for debug information
+	if (_showZones)
+		displayZones();
+
+	if (_showLines)
+		displayLines();
+
+	// Update the screen
+	g_system->updateScreen();
+}
+
+void GraphicsManager::copyWinscanVbe3(const byte *srcData, byte *destSurface) {
+	byte srcByte;
+	byte destLen1;
+	byte *destSlice1P;
+	byte destLen2;
+	byte *destSlice2P;
+
+	int rleValue = 0;
+	int destOffset = 0;
+	const byte *srcP = srcData;
+	for (;;) {
+		srcByte = srcP[0];
+		if (srcByte == kByteStop)
+			return;
+		if (srcByte == 211) {
+			destLen1 = srcP[1];
+			rleValue = srcP[2];
+			destSlice1P = destOffset + destSurface;
+			destOffset += destLen1;
+			memset(destSlice1P, rleValue, destLen1);
+			srcP += 3;
+		} else if (srcByte < 222) {
+			if (srcByte > 211) {
+				destLen2 = (byte)(srcP[0] + 45);
+				rleValue = srcP[1];
+				destSlice2P = destOffset + destSurface;
+				destOffset += destLen2;
+				memset(destSlice2P, rleValue, destLen2);
+				srcP += 2;
+			} else {
+				destSurface[destOffset] = srcByte;
+				++srcP;
+				++destOffset;
+			}
+		} else if (srcByte < kSetOffset) {
+			destOffset += (byte)(srcP[0] + 35);
+			srcP++;
+		} else if (srcByte == k8bVal) {
+			destOffset += srcP[1];
+			srcP += 2;
+		} else if (srcByte == k16bVal) {
+			destOffset += READ_LE_UINT16(srcP + 1);
+			srcP += 3;
+		} else {
+			destOffset += READ_LE_UINT32(srcP + 1);
+			srcP += 5;
+		}
+	}
+}
+
+void GraphicsManager::copyVideoVbe16(const byte *srcData) {
+	const byte *srcP = srcData;
+	int destOffset = 0;
+
+	lockScreen();
+	assert(_videoPtr);
+
+	for (;;) {
+		byte srcByte = srcP[0];
+		if (srcByte >= 222) {
+			if (srcByte == kByteStop)
+				break;
+
+			if (srcByte < kSetOffset) {
+				destOffset += srcByte - 221;
+				srcByte = *++srcP;
+			} else if (srcByte == k8bVal) {
+				destOffset += srcP[1];
+				srcByte = srcP[2];
+				srcP += 2;
+			} else if (srcByte == k16bVal) {
+				destOffset += READ_LE_UINT16(srcP + 1);
+				srcByte = srcP[3];
+				srcP += 3;
+			} else {
+				destOffset += READ_LE_UINT32(srcP + 1);
+				srcByte = srcP[5];
+				srcP += 5;
+			}
+		}
+
+		if (destOffset > SCREEN_WIDTH * SCREEN_HEIGHT) {
+			warning("HACK: Stopping anim, out of bounds - 0x%x %d", srcByte, destOffset);
+			break;
+		}
+
+		if (srcByte > 210) {
+			if (srcByte == 211) {
+				int pixelCount = srcP[1];
+				int pixelIndex = srcP[2];
+				byte *destP = (byte *)_videoPtr + destOffset * 2;
+				destOffset += pixelCount;
+
+				while (pixelCount--) {
+					destP[0] = _palettePixels[2 * pixelIndex];
+					destP[1] = _palettePixels[(2 * pixelIndex) + 1];
+					destP += 2;
+				}
+
+				srcP += 3;
+			} else {
+				int pixelCount = srcByte - 211;
+				int pixelIndex = srcP[1];
+				byte *destP = (byte *)_videoPtr + destOffset * 2;
+				destOffset += pixelCount;
+
+				while (pixelCount--) {
+					destP[0] = _palettePixels[2 * pixelIndex];
+					destP[1] = _palettePixels[(2 * pixelIndex) + 1];
+					destP += 2;
+				}
+
+				srcP += 2;
+			}
+		} else {
+			byte *destP = (byte *)_videoPtr + destOffset * 2;
+			destP[0] = _palettePixels[2 * srcByte];
+			destP[1] = _palettePixels[(2 * srcByte) + 1];
+			++srcP;
+			++destOffset;
+		}
+	}
+	unlockScreen();
+}
+
+void GraphicsManager::copyVideoVbe16a(const byte *srcData) {
+	byte srcByte;
+	int destOffset = 0;
+	const byte *srcP = srcData;
+
+	lockScreen();
+	for (;;) {
+		srcByte = srcP[0];
+		if (srcByte == kByteStop)
+			break;
+		if (srcP[0] > kByteStop) {
+			if (srcByte == k8bVal) {
+				destOffset += srcP[1];
+				srcByte = srcP[2];
+				srcP += 2;
+			} else if (srcByte == k16bVal) {
+				destOffset += READ_LE_UINT16(srcP + 1);
+				srcByte = srcP[3];
+				srcP += 3;
+			} else {
+				destOffset += READ_LE_UINT32(srcP + 1);
+				srcByte = srcP[5];
+				srcP += 5;
+			}
+		}
+
+		WRITE_LE_UINT16((byte *)_videoPtr + destOffset * 2, READ_LE_UINT16(_palettePixels + 2 * srcByte));
+		++srcP;
+		++destOffset;
+	}
+	unlockScreen();
+}
+
+void GraphicsManager::copySurfaceRect(const byte *srcSurface, byte *destSurface, int xs, int ys, int width, int height) {
+	const byte *srcP;
+	byte *destP;
+	int rowCount;
+	int rowCount2;
+
+	// TODO: This code in the original is potentially dangerous, as it doesn't clip the area to within
+	// the screen, and so thus can read areas outside of the allocated surface buffer
+	srcP = xs + _lineNbr2 * ys + srcSurface;
+	destP = destSurface;
+	rowCount = height;
+	do {
+		rowCount2 = rowCount;
+		if (width & 1) {
+			memcpy(destP, srcP, width);
+			srcP += width;
+			destP += width;
+		} else if (width & 2) {
+			for (int i = width >> 1; i; --i) {
+				destP[0] = srcP[0];
+				destP[1] = srcP[1];
+				srcP += 2;
+				destP += 2;
+			}
+		} else {
+			memcpy(destP, srcP, 4 * (width >> 2));
+			srcP += 4 * (width >> 2);
+			destP += 4 * (width >> 2);
+		}
+		srcP = _lineNbr2 + srcP - width;
+		rowCount = rowCount2 - 1;
+	} while (rowCount2 != 1);
+}
+
+/**
+ * Draws a sprite onto the screen
+ * @param surface		Destination surface
+ * @param spriteData	The raw data for a sprite set
+ * @param xp			X co-ordinate. For some reason, starts from 300 = first column
+ * @param yp			Y co-ordinate. FOr some reason, starts from 300 = top row
+ * @param spriteIndex	Index of the sprite to draw
+ */
+void GraphicsManager::drawVesaSprite(byte *surface, const byte *spriteData, int xp, int yp, int spriteIndex) {
+	// Get a pointer to the start of the desired sprite
+	const byte *spriteP = spriteData + 3;
+	for (int i = spriteIndex; i; --i)
+		spriteP += READ_LE_UINT32(spriteP) + 16;
+
+	_posXClipped = 0;
+	_posYClipped = 0;
+	_clipFl = false;
+
+	spriteP += 4;
+	int width = READ_LE_UINT16(spriteP);
+	spriteP += 2;
+	int height = READ_LE_UINT16(spriteP);
+
+	// Clip X
+	_clipX1 = width;
+	if ((xp + width) <= _minX + 300)
+		return;
+	if (xp < _minX + 300) {
+		_posXClipped = _minX + 300 - xp;
+		_clipFl = true;
+	}
+
+	// Clip Y
+	_clipY1 = height;
+	if (yp <= 0)
+		return;
+	if (yp < _minY + 300) {
+		_posYClipped = _minY + 300 - yp;
+		_clipFl = true;
+	}
+
+	// Clip X1
+	if (xp >= _maxX + 300)
+		return;
+	if (xp + width > _maxX + 300) {
+		int xAmount = width + 10 - (xp + width - (_maxX + 300));
+		if (xAmount <= 10)
+			return;
+
+		_clipX1 = xAmount - 10;
+		_clipFl = true;
+	}
+
+	// Clip Y1
+	if (yp >= _maxY + 300)
+		return;
+	if (yp + height > _maxY + 300) {
+		int yAmount = height + 10 - (yp + height - (_maxY + 300));
+		if (yAmount <= 10)
+			return;
+
+		// _clipY1 is always positive thanks to the previous check
+		_clipY1 = yAmount - 10;
+		_clipFl = true;
+	}
+
+	// Sprite display
+
+	// Set up source
+	spriteP += 6;
+	int srcOffset = READ_LE_UINT16(spriteP);
+	spriteP += 4;
+	const byte *srcP = spriteP;
+	spriteP += srcOffset;
+
+	// Set up surface destination
+	byte *destP = surface + (yp - 300) * _lineNbr2 + (xp - 300);
+
+	// Handling for clipped versus non-clipped
+	if (_clipFl) {
+		// Clipped version
+		for (int yc = 0; yc < _clipY1; ++yc, destP += _lineNbr2) {
+			byte *tempDestP = destP;
+			byte byteVal;
+			int xc = 0;
+
+			while ((byteVal = *srcP) != 253) {
+				++srcP;
+				width = READ_LE_UINT16(srcP);
+				srcP += 2;
+
+				if (byteVal == 254) {
+					// Copy pixel range
+					for (int xv = 0; xv < width; ++xv, ++xc, ++spriteP, ++tempDestP) {
+						if (_posYClipped == 0 && xc >= _posXClipped && xc < _clipX1)
+							*tempDestP = *spriteP;
+					}
+				} else {
+					// Skip over bytes
+					tempDestP += width;
+					xc += width;
+				}
+			}
+
+			if (_posYClipped > 0)
+				--_posYClipped;
+			srcP += 3;
+		}
+	} else {
+		// Non-clipped
+		for (int yc = 0; yc < height; ++yc, destP += _lineNbr2) {
+			byte *tempDestP = destP;
+			byte byteVal;
+
+			while ((byteVal = *srcP) != 253) {
+				++srcP;
+				width = READ_LE_UINT16(srcP);
+				srcP += 2;
+
+				if (byteVal == 254) {
+					// Copy pixel range
+					Common::copy(spriteP, spriteP + width, tempDestP);
+					spriteP += width;
+				}
+
+				tempDestP += width;
+			}
+
+			// Skip over control byte and width
+			srcP += 3;
+		}
+	}
+}
+
+void GraphicsManager::endDisplayBob() {
+	for (int idx = 1; idx <= 20; ++idx) {
+		if (_vm->_animMan->_animBqe[idx]._enabledFl)
+			_vm->_objectsMan->hideBob(idx);
+	}
+
+	_vm->_events->refreshScreenAndEvents();
+	_vm->_events->refreshScreenAndEvents();
+
+	for (int idx = 1; idx <= 20; ++idx) {
+		if (_vm->_animMan->_animBqe[idx]._enabledFl)
+			_vm->_objectsMan->resetBob(idx);
+	}
+
+	for (int idx = 1; idx < 36; ++idx) {
+		_vm->_objectsMan->_lockedAnims[idx]._enableFl = false;
+	}
+
+	for (int idx = 1; idx <= 20; ++idx) {
+		_vm->_animMan->_animBqe[idx]._enabledFl = false;
+	}
+}
+
+void GraphicsManager::displayAllBob() {
+	for (int idx = 1; idx <= 20; ++idx) {
+		if (_vm->_animMan->_animBqe[idx]._enabledFl)
+			_vm->_objectsMan->displayBob(idx);
+	}
+}
+
+void GraphicsManager::resetDirtyRects() {
+	_dirtyRects.clear();
+}
+
+void GraphicsManager::resetRefreshRects() {
+	_refreshRects.clear();
+}
+
+// Add a game area dirty rectangle
+void GraphicsManager::addDirtyRect(int x1, int y1, int x2, int y2) {
+	x1 = CLIP(x1, _minX, _maxX);
+	y1 = CLIP(y1, _minY, _maxY);
+	x2 = CLIP(x2, _minX, _maxX);
+	y2 = CLIP(y2, _minY, _maxY);
+
+	if ((x2 > x1) && (y2 > y1))
+		addRectToArray(_dirtyRects, Common::Rect(x1, y1, x2, y2));
+}
+
+// Add a refresh rect
+void GraphicsManager::addRefreshRect(int x1, int y1, int x2, int y2) {
+	x1 = MAX(x1, 0);
+	y1 = MAX(y1, 0);
+	x2 = MIN(x2, SCREEN_WIDTH);
+	y2 = MIN(y2, SCREEN_HEIGHT);
+
+	if ((x2 > x1) && (y2 > y1))
+		addRectToArray(_refreshRects, Common::Rect(x1, y1, x2, y2));
+}
+
+void GraphicsManager::addRectToArray(Common::Array<Common::Rect> &rects, const Common::Rect &newRect) {
+	// Scan for an intersection with existing rects
+	uint rectIndex;
+	for (rectIndex = 0; rectIndex < rects.size(); ++rectIndex) {
+		Common::Rect &r = rects[rectIndex];
+
+		if (r.intersects(newRect)) {
+			// Rect either intersects or is completely inside existing one, so extend existing one as necessary
+			r.extend(newRect);
+			break;
+		}
+	}
+	if (rectIndex == rects.size()) {
+		// Rect not intersecting any existing one, so add it in
+		assert(rects.size() < DIRTY_RECTS_SIZE);
+		rects.push_back(newRect);
+	}
+
+	// Take care of merging the existing rect list. This is done as a separate check even if
+	// a previous extending above has been done, since the merging of the new rect above may
+	// result in further rects now able to be merged
+
+	for (int srcIndex = rects.size() - 1; srcIndex > 0; --srcIndex) {
+		const Common::Rect &srcRect = rects[srcIndex];
+
+		// Loop through all the other rects to see if it intersects them
+		for (int destIndex = srcIndex - 1; destIndex >= 0; --destIndex) {
+			if (rects[destIndex].intersects(srcRect)) {
+				// Found an intersection, so extend the found one, and delete the original
+				rects[destIndex].extend(srcRect);
+				rects.remove_at(srcIndex);
+				break;
+			}
+		}
+	}
+}
+
+// Draw any game dirty rects onto the screen intermediate surface
+void GraphicsManager::displayDirtyRects() {
+	if (_dirtyRects.size() == 0)
+		return;
+
+	lockScreen();
+
+	// Refresh the entire screen
+	for (uint idx = 0; idx < _dirtyRects.size(); ++idx) {
+		Common::Rect &r = _dirtyRects[idx];
+		Common::Rect dstRect;
+
+		if (_vm->_events->_breakoutFl) {
+			displayScaled8BitRect(_frontBuffer, r.left, r.top, r.right - r.left, r.bottom - r.top, r.left, r.top);
+			dstRect.left = r.left * 2;
+			dstRect.top = r.top * 2 + 30;
+			dstRect.setWidth((r.right - r.left) * 2);
+			dstRect.setHeight((r.bottom - r.top) * 2);
+		} else if (r.right > _vm->_events->_startPos.x && r.left < _vm->_events->_startPos.x + SCREEN_WIDTH) {
+			r.left = MAX<int16>(r.left, _vm->_events->_startPos.x);
+			r.right = MIN<int16>(r.right, (int16)_vm->_events->_startPos.x + SCREEN_WIDTH);
+
+			display8BitRect(_frontBuffer, r.left, r.top, r.right - r.left, r.bottom - r.top, r.left - _vm->_events->_startPos.x, r.top);
+
+			dstRect.left = r.left - _vm->_events->_startPos.x;
+			dstRect.top = r.top;
+			dstRect.setWidth(r.right - r.left);
+			dstRect.setHeight(r.bottom - r.top);
+		}
+
+		// If it's a valid rect, then add it to the list of areas to refresh on the screen
+		if (dstRect.isValidRect() && dstRect.width() > 0 && dstRect.height() > 0)
+			addRectToArray(_refreshRects, dstRect);
+	}
+
+	unlockScreen();
+	resetDirtyRects();
+}
+
+void GraphicsManager::displayRefreshRects() {
+	Graphics::Surface *screenSurface = NULL;
+	if (_showDirtyRects) {
+		screenSurface = g_system->lockScreen();
+		g_system->copyRectToScreen(_screenBuffer, _screenLineSize, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
+	}
+
+	// Loop through copying over any  specified rects to the screen
+	for (uint idx = 0; idx < _refreshRects.size(); ++idx) {
+		const Common::Rect &r = _refreshRects[idx];
+
+		byte *srcP = _screenBuffer + _screenLineSize * r.top + (r.left * 2);
+		g_system->copyRectToScreen(srcP, _screenLineSize, r.left, r.top, r.width(), r.height());
+
+		if (_showDirtyRects)
+			screenSurface->frameRect(r, 0xffffff);
+	}
+
+	if (_showDirtyRects)
+		g_system->unlockScreen();
+
+	resetRefreshRects();
+}
+
+/**
+ * Display any zones for the current room
+ */
+void GraphicsManager::displayZones() {
+	Graphics::Surface *screenSurface = g_system->lockScreen();
+
+	for (int bobZoneId = 0; bobZoneId <= 48; bobZoneId++) {
+		int bobId = _vm->_linesMan->_bobZone[bobZoneId];
+		if (bobId) {
+			// Get the rectangle for the zone
+			Common::Rect r(_vm->_objectsMan->_bob[bobId]._oldX, _vm->_objectsMan->_bob[bobId]._oldY,
+				_vm->_objectsMan->_bob[bobId]._oldX + _vm->_objectsMan->_bob[bobId]._oldWidth,
+				_vm->_objectsMan->_bob[bobId]._oldY + _vm->_objectsMan->_bob[bobId]._oldHeight);
+				
+			displayDebugRect(screenSurface, r, 0xff0000);
+		}
+	}
+
+	for (int squareZoneId = 0; squareZoneId <= 99; squareZoneId++) {
+		if (_vm->_linesMan->_zone[squareZoneId]._enabledFl && _vm->_linesMan->_squareZone[squareZoneId]._enabledFl) {
+			Common::Rect r(_vm->_linesMan->_squareZone[squareZoneId]._left, _vm->_linesMan->_squareZone[squareZoneId]._top,
+				_vm->_linesMan->_squareZone[squareZoneId]._right, _vm->_linesMan->_squareZone[squareZoneId]._bottom);
+
+			displayDebugRect(screenSurface, r, 0x00ff00);
+		}
+	}
+
+	g_system->unlockScreen();
+}
+
+/**
+ * Display any zones for the current room
+ */
+void GraphicsManager::displayLines() {
+	Graphics::Surface *screenSurface = g_system->lockScreen();
+
+	uint16* pixels = (uint16*)screenSurface->pixels;
+
+	for (int lineIndex = 0; lineIndex < _vm->_linesMan->_linesNumb; lineIndex++) {	
+		int i = 0;
+		do {
+			int x = _vm->_linesMan->_lineItem[lineIndex]._lineData[i] - _scrollPosX;
+			int y = _vm->_linesMan->_lineItem[lineIndex]._lineData[i+1];
+			if (x >= 0 && x < SCREEN_WIDTH && y >= 0 && y < SCREEN_HEIGHT) {
+				pixels[ y * screenSurface->w + x ] = 0xffff;
+			}
+			i += 2;
+		}
+		while(_vm->_linesMan->_lineItem[lineIndex]._lineData[i] != -1);
+	}
+
+	g_system->unlockScreen();
+}
+
+
+void GraphicsManager::displayDebugRect(Graphics::Surface *surface, const Common::Rect &srcRect, uint32 color) {
+	Common::Rect r = srcRect;
+
+	// Move for scrolling offset and adjust to crop on-screen
+	r.translate(-_scrollPosX, 0);
+	r.left = MAX(r.left, (int16)0);
+	r.top = MAX(r.top, (int16)0);
+	r.right = MIN(r.right, (int16)SCREEN_WIDTH);
+	r.bottom = MIN(r.bottom, (int16)SCREEN_HEIGHT);
+				
+	// If there's an on-screen portion, display it
+	if (r.isValidRect())
+		surface->frameRect(r, color);
+}
+
+/**
+ * Fast Display of either a compressed or vesa sprite
+ */
+void GraphicsManager::fastDisplay(const byte *spriteData, int xp, int yp, int spriteIndex, bool addSegment) {
+	int width = _vm->_objectsMan->getWidth(spriteData, spriteIndex);
+	int height = _vm->_objectsMan->getHeight(spriteData, spriteIndex);
+
+	if (*spriteData == 78) {
+		drawCompressedSprite(_backBuffer, spriteData, xp + 300, yp + 300, spriteIndex, 0, 0, false);
+		drawCompressedSprite(_frontBuffer, spriteData, xp + 300, yp + 300, spriteIndex, 0, 0, false);
+	} else {
+		drawVesaSprite(_frontBuffer, spriteData, xp + 300, yp + 300, spriteIndex);
+		drawVesaSprite(_backBuffer, spriteData, xp + 300, yp + 300, spriteIndex);
+	}
+	if (addSegment)
+		addDirtyRect(xp, yp, xp + width, yp + height);
+}
+
+void GraphicsManager::fastDisplay2(const byte *objectData, int xp, int yp, int idx, bool addSegment) {
+	int width = _vm->_objectsMan->getWidth(objectData, idx);
+	int height = _vm->_objectsMan->getHeight(objectData, idx);
+	if (*objectData == 78) {
+		drawCompressedSprite(_backBuffer, objectData, xp + 300, yp + 300, idx, 0, 0, false);
+		drawCompressedSprite(_frontBuffer, objectData, xp + 300, yp + 300, idx, 0, 0, false);
+	} else {
+		drawVesaSprite(_frontBuffer, objectData, xp + 300, yp + 300, idx);
+		drawVesaSprite(_backBuffer, objectData, xp + 300, yp + 300, idx);
+	}
+	if (addSegment)
+		addDirtyRect(xp, yp, xp + width, yp + height);
+}
+
+/**
+ * Copy from surface to video buffer, scale 2x.
+ */
+void GraphicsManager::copy16bFromSurfaceScaleX2(const byte *surface) {
+	byte *palPtr;
+	int curPixel;
+
+	lockScreen();
+
+	assert(_videoPtr);
+	const byte *curSurface = surface;
+	byte *destPtr = 30 * _screenLineSize + (byte *)_videoPtr;
+	for (int y = 200; y; y--) {
+		byte *oldDestPtr = destPtr;
+		for (int x = 320; x; x--) {
+			curPixel = 2 * *curSurface;
+			palPtr = _palettePixels + curPixel;
+			destPtr[0] = destPtr[2] = destPtr[_screenLineSize] = destPtr[_screenLineSize + 2] = palPtr[0];
+			destPtr[1] = destPtr[3] = destPtr[_screenLineSize + 1] = destPtr[_screenLineSize + 3] = palPtr[1];
+			++curSurface;
+			destPtr += 4;
+		}
+		destPtr = _screenLineSize * 2 + oldDestPtr;
+	}
+
+	unlockScreen();
+}
+
+void GraphicsManager::restoreSurfaceRect(byte *destSurface, const byte *src, int xp, int yp, int width, int height) {
+	int yCtr;
+
+	byte *destP = xp + _lineNbr2 * yp + destSurface;
+	int yNext = height;
+	const byte *srcP = src;
+	do {
+		yCtr = yNext;
+		if (width & 1) {
+			memcpy(destP, srcP, width);
+			srcP += width;
+			destP += width;
+		} else if (width & 2) {
+			for (int i = width >> 1; i; --i) {
+				destP[0] = srcP[0];
+				destP[1] = srcP[1];
+				srcP += 2;
+				destP += 2;
+			}
+		} else {
+			memcpy(destP, srcP, 4 * (width >> 2));
+			srcP += 4 * (width >> 2);
+			destP += 4 * (width >> 2);
+		}
+		destP = _lineNbr2 + destP - width;
+		yNext = yCtr - 1;
+	} while (yCtr != 1);
+}
+
+/**
+ * Compute the value of a parameter plus a given percentage
+ */
+int GraphicsManager::zoomIn(int val, int percentage) {
+	if (val)
+		val += percentage * (long int)val / 100;
+
+	return val;
+}
+
+/**
+ * Compute the value of a parameter minus a given percentage
+ */
+int GraphicsManager::zoomOut(int val, int percentage) {
+	if (val)
+		val -= percentage * (long int)val / 100;
+
+	return val;
+}
+
+// Display 'Perfect?'
+void GraphicsManager::drawCompressedSprite(byte *surface, const byte *srcData, int xp300, int yp300, int frameIndex, int zoom1, int zoom2, bool flipFl) {
+	const byte *spriteStartP = srcData + 3;
+	for (int i = frameIndex; i; --i)
+		spriteStartP += READ_LE_UINT32(spriteStartP) + 16;
+
+	const byte *spriteSizeP = spriteStartP + 4;
+	int spriteWidth = READ_LE_INT16(spriteSizeP);
+	spriteSizeP += 2;
+	int spriteHeight2 = READ_LE_INT16(spriteSizeP);
+	int spriteHeight1 = spriteHeight2;
+	const byte *spritePixelsP = spriteSizeP + 10;
+	_posXClipped = 0;
+	_posYClipped = 0;
+	_clipX1 = 0;
+	_clipY1 = 0;
+	if ((xp300 <= _minX) || (yp300 <= _minY) || (xp300 >= _maxX + 300) || 	(yp300 >= _maxY + 300))
+		return;
+
+	// Clipped values are greater or equal to zero, thanks to the previous test
+	_clipX1 = _maxX + 300 - xp300;
+	_clipY1 = _maxY + 300 - yp300;
+
+	// _minX is never negative, and should be always 0
+	// The previous check insures that xp300 it's always greater to it
+	// After this check, posXClipped is always positive
+	if (xp300 < _minX + 300)
+		_posXClipped = _minX + 300 - xp300;
+
+	// Ditto.
+	if (yp300 < _minY + 300)
+		_posYClipped = _minY + 300 - yp300;
+
+	byte *dest1P = xp300 + _lineNbr2 * (yp300 - 300) - 300 + surface;
+	if (zoom2) {
+		_enlargedX = 0;
+		_enlargedY = 0;
+		_enlargedYFl = false;
+		_enlargedXFl = false;
+		_width = spriteWidth;
+		int zoomedWidth = zoomIn(spriteWidth, zoom2);
+		int zoomedHeight = zoomIn(spriteHeight1, zoom2);
+		if (flipFl) {
+			byte *clippedDestP = zoomedWidth + dest1P;
+			if (_posYClipped) {
+				if (_posYClipped < 0 || _posYClipped >= zoomedHeight)
+					return;
+				int hiddenHeight = 0;
+				while (zoomIn(++hiddenHeight, zoom2) < _posYClipped)
+					;
+				spritePixelsP += _width * hiddenHeight;
+				clippedDestP += _lineNbr2 * _posYClipped;
+				zoomedHeight -= _posYClipped;
+			}
+			if (zoomedHeight > _clipY1)
+				zoomedHeight = _clipY1;
+			if (_posXClipped) {
+				if (_posXClipped >= zoomedWidth)
+					return;
+				zoomedWidth -= _posXClipped;
+			}
+			if (zoomedWidth > _clipX1) {
+				int clippedZoomedWidth = zoomedWidth - _clipX1;
+				clippedDestP -= clippedZoomedWidth;
+				int closestWidth = 0;
+				while (zoomIn(++closestWidth, zoom2) < clippedZoomedWidth)
+					;
+				spritePixelsP += closestWidth;
+				zoomedWidth = _clipX1;
+			}
+			int curHeight;
+			do {
+				for (;;) {
+					curHeight = zoomedHeight;
+					byte *oldDestP = clippedDestP;
+					const byte *oldSpritePixelsP = spritePixelsP;
+					_enlargedXFl = false;
+					_enlargedX = 0;
+					for (int i = zoomedWidth; i; _enlargedXFl = false, i--) {
+						for (;;) {
+							if (*spritePixelsP)
+								*clippedDestP = *spritePixelsP;
+							--clippedDestP;
+							++spritePixelsP;
+							if (!_enlargedXFl)
+								_enlargedX += zoom2;
+							if (_enlargedX >= 0 && _enlargedX < 100)
+								break;
+							_enlargedX -= 100;
+							--spritePixelsP;
+							_enlargedXFl = true;
+							--i;
+							if (!i)
+								break;
+						}
+					}
+					spritePixelsP = _width + oldSpritePixelsP;
+					clippedDestP = _lineNbr2 + oldDestP;
+					if (!_enlargedYFl)
+						_enlargedY += zoom2;
+					if (_enlargedY  >= 0 && _enlargedY < 100)
+						break;
+					_enlargedY -= 100;
+					spritePixelsP = oldSpritePixelsP;
+					_enlargedYFl = true;
+					zoomedHeight = curHeight - 1;
+					if (curHeight == 1)
+						return;
+				}
+				_enlargedYFl = false;
+				zoomedHeight = curHeight - 1;
+			} while (curHeight != 1);
+		} else {
+			if (_posYClipped) {
+				if (_posYClipped >= zoomedHeight)
+					return;
+				int closerHeight = 0;
+				while (zoomIn(++closerHeight, zoom2) < _posYClipped)
+					;
+				spritePixelsP += _width * closerHeight;
+				dest1P += _lineNbr2 * _posYClipped;
+				zoomedHeight -= _posYClipped;
+			}
+			if (zoomedHeight > _clipY1)
+				zoomedHeight = _clipY1;
+			if (_posXClipped) {
+				if (_posXClipped >= zoomedWidth)
+					return;
+				int closerWidth = 0;
+				while (zoomIn(++closerWidth, zoom2) < _posXClipped)
+					;
+				spritePixelsP += closerWidth;
+				dest1P += _posXClipped;
+				zoomedWidth = zoomedWidth - _posXClipped;
+			}
+			if (zoomedWidth > _clipX1)
+				zoomedWidth = _clipX1;
+
+			int curHeight;
+			do {
+				for (;;) {
+					curHeight = zoomedHeight;
+					byte *oldDest1P = dest1P;
+					const byte *oldSpritePixelsP = spritePixelsP;
+					_enlargedXFl = false;
+					_enlargedX = 0;
+					for (int i = zoomedWidth; i; _enlargedXFl = false, i--) {
+						for (;;) {
+							if (*spritePixelsP)
+								*dest1P = *spritePixelsP;
+							++dest1P;
+							++spritePixelsP;
+							if (!_enlargedXFl)
+								_enlargedX += zoom2;
+							if (_enlargedX >= 0 && _enlargedX < 100)
+								break;
+							_enlargedX -= 100;
+							--spritePixelsP;
+							_enlargedXFl = true;
+							--i;
+							if (!i)
+								break;
+						}
+					}
+					spritePixelsP = _width + oldSpritePixelsP;
+					dest1P = _lineNbr2 + oldDest1P;
+					if (!_enlargedYFl)
+						_enlargedY += zoom2;
+					if (_enlargedY >= 0 && _enlargedY < 100)
+						break;
+					_enlargedY -= 100;
+					spritePixelsP = oldSpritePixelsP;
+					_enlargedYFl = true;
+					zoomedHeight = curHeight - 1;
+					if (curHeight == 1)
+						return;
+				}
+				_enlargedYFl = false;
+				zoomedHeight = curHeight - 1;
+			} while (curHeight != 1);
+		}
+	} else if (zoom1) {
+		_reduceX = 0;
+		_reducedY = 0;
+		_width = spriteWidth;
+		_zoomOutFactor = zoom1;
+		if (zoom1 < 100) {
+			int zoomedSpriteWidth = zoomOut(spriteWidth, _zoomOutFactor);
+			if (flipFl) {
+				byte *curDestP = zoomedSpriteWidth + dest1P;
+				do {
+					byte *oldDestP = curDestP;
+					_reducedY += _zoomOutFactor;
+					if (_reducedY >= 0 && _reducedY < 100) {
+						_reduceX = 0;
+						int curWidth = zoomedSpriteWidth;
+						for (int i = _width; i; i--) {
+							_reduceX += _zoomOutFactor;
+							if (_reduceX >= 0 && _reduceX < 100) {
+								if (curWidth >= _posXClipped && curWidth < _clipX1 && *spritePixelsP)
+									*curDestP = *spritePixelsP;
+								--curDestP;
+								++spritePixelsP;
+								--curWidth;
+							} else {
+								_reduceX -= 100;
+								++spritePixelsP;
+							}
+						}
+						curDestP = _lineNbr2 + oldDestP;
+					} else {
+						_reducedY -= 100;
+						spritePixelsP += _width;
+					}
+					--spriteHeight2;
+				} while (spriteHeight2);
+			} else {
+				do {
+					int oldSpriteHeight = spriteHeight2;
+					byte *oldDest1P = dest1P;
+					_reducedY += _zoomOutFactor;
+					if (_reducedY >= 0 && _reducedY < 100) {
+						_reduceX = 0;
+						int curX = 0;
+						for (int i = _width; i; i--) {
+							_reduceX += _zoomOutFactor;
+							if (_reduceX >= 0 && _reduceX < 100) {
+								if (curX >= _posXClipped && curX < _clipX1 && *spritePixelsP)
+									*dest1P = *spritePixelsP;
+								++dest1P;
+								++spritePixelsP;
+								++curX;
+							} else {
+								_reduceX -= 100;
+								++spritePixelsP;
+							}
+						}
+						spriteHeight2 = oldSpriteHeight;
+						dest1P = _lineNbr2 + oldDest1P;
+					} else {
+						_reducedY -= 100;
+						spritePixelsP += _width;
+					}
+					--spriteHeight2;
+				} while (spriteHeight2);
+			}
+		}
+	} else {
+		_width = spriteWidth;
+		if (flipFl) {
+			byte *dest2P = spriteWidth + dest1P;
+			_specialWidth = spriteWidth;
+			if (_posYClipped) {
+				if (_posYClipped >= spriteHeight1 || spriteHeight1 < 0)
+					return;
+				spritePixelsP += spriteWidth * _posYClipped;
+				dest2P += _lineNbr2 * _posYClipped;
+				spriteHeight1 -= _posYClipped;
+			}
+			if (spriteHeight1 > _clipY1)
+				spriteHeight1 = _clipY1;
+
+			if (_posXClipped >= spriteWidth)
+				return;
+			spriteWidth -= _posXClipped;
+
+			if (spriteWidth > _clipX1) {
+				int clippedWidth = spriteWidth - _clipX1;
+				spritePixelsP += clippedWidth;
+				dest2P -= clippedWidth;
+				spriteWidth = _clipX1;
+			}
+			int yCtr2;
+			do {
+				yCtr2 = spriteHeight1;
+				byte *destCopy2P = dest2P;
+				const byte *spritePixelsCopy2P = spritePixelsP;
+				for (int xCtr2 = spriteWidth; xCtr2; xCtr2--) {
+					if (*spritePixelsP)
+						*dest2P = *spritePixelsP;
+					++spritePixelsP;
+					--dest2P;
+				}
+				spritePixelsP = _specialWidth + spritePixelsCopy2P;
+				dest2P = _lineNbr2 + destCopy2P;
+				spriteHeight1 = yCtr2 - 1;
+			} while (yCtr2 != 1);
+		} else {
+			_specialWidth = spriteWidth;
+			if (_posYClipped) {
+				if (_posYClipped >= spriteHeight1 || spriteHeight1 < 0)
+					return;
+				spritePixelsP += spriteWidth * _posYClipped;
+				dest1P += _lineNbr2 * _posYClipped;
+				spriteHeight1 -= _posYClipped;
+			}
+			if (spriteHeight1 > _clipY1)
+				spriteHeight1 = _clipY1;
+			if (_posXClipped) {
+				if (_posXClipped >= spriteWidth)
+					return;
+				spritePixelsP += _posXClipped;
+				dest1P += _posXClipped;
+				spriteWidth -= _posXClipped;
+			}
+			if (spriteWidth > _clipX1)
+				spriteWidth = _clipX1;
+			int yCtr1;
+			do {
+				yCtr1 = spriteHeight1;
+				byte *dest1CopyP = dest1P;
+				const byte *spritePixelsCopyP = spritePixelsP;
+				for (int xCtr1 = spriteWidth; xCtr1; xCtr1--) {
+					if (*spritePixelsP)
+						*dest1P = *spritePixelsP;
+					++dest1P;
+					++spritePixelsP;
+				}
+				spritePixelsP = _specialWidth + spritePixelsCopyP;
+				dest1P = _lineNbr2 + dest1CopyP;
+				spriteHeight1 = yCtr1 - 1;
+			} while (yCtr1 != 1);
+		}
+	}
+}
+
+void GraphicsManager::copySurface(const byte *surface, int x1, int y1, int width, int height, byte *destSurface, int destX, int destY) {
+	int left = x1;
+	int top = y1;
+	int croppedWidth = width;
+	int croppedHeight = height;
+
+	if (x1 < _minX) {
+		croppedWidth = width - (_minX - x1);
+		left = _minX;
+	}
+	if (y1 < _minY) {
+		croppedHeight = height - (_minY - y1);
+		top = _minY;
+	}
+
+	if (top + croppedHeight > _maxY)
+		croppedHeight = _maxY - top;
+	if (left + croppedWidth > _maxX)
+		croppedWidth = _maxX - left;
+
+	if (croppedWidth > 0 && croppedHeight > 0) {
+		int height2 = croppedHeight;
+		copyRect(surface, left, top, croppedWidth, croppedHeight, destSurface, destX, destY);
+		addDirtyRect(left, top, left + croppedWidth, top + height2);
+	}
+}
+
+void GraphicsManager::copyRect(const byte *srcSurface, int x1, int y1, uint16 width, int height, byte *destSurface, int destX, int destY) {
+	const byte *srcP = x1 + _lineNbr2 * y1 + srcSurface;
+	byte *destP = destX + _lineNbr2 * destY + destSurface;
+	int yp = height;
+	int yCurrent;
+	do {
+		yCurrent = yp;
+		memcpy(destP, srcP, 4 * (width >> 2));
+		const byte *src2P = (srcP + 4 * (width >> 2));
+		byte *dest2P = (destP + 4 * (width >> 2));
+		int pitch = width - 4 * (width >> 2);
+		memcpy(dest2P, src2P, pitch);
+		destP = (dest2P + pitch + _lineNbr2 - width);
+		srcP = (src2P + pitch + _lineNbr2 - width);
+		yp = yCurrent - 1;
+	} while (yCurrent != 1);
+}
+
+// Display Font
+void GraphicsManager::displayFont(byte *surface, const byte *spriteData, int xp, int yp, int characterIndex, int color) {
+	const byte *spriteDataP = spriteData + 3;
+	for (int i = characterIndex; i; --i)
+		spriteDataP += READ_LE_UINT32(spriteDataP) + 16;
+
+	int spriteWidth = 0;
+	int spriteHeight = 0;
+	const byte *spriteSizeP = spriteDataP + 4;
+	spriteWidth = READ_LE_INT16(spriteSizeP);
+	spriteSizeP += 2;
+	spriteHeight = READ_LE_INT16(spriteSizeP);
+	const byte *spritePixelsP = spriteSizeP + 10;
+	byte *destP = surface + xp + _lineNbr2 * yp;
+	_width = spriteWidth;
+
+	int yCtr;
+	do {
+		yCtr = spriteHeight;
+		byte *destLineP = destP;
+		for (int xCtr = spriteWidth; xCtr; xCtr--) {
+			byte destByte = *spritePixelsP;
+			if (*spritePixelsP) {
+				if (destByte == 252)
+					destByte = color;
+				*destP = destByte;
+			}
+
+			++destP;
+			++spritePixelsP;
+		}
+		destP = _lineNbr2 + destLineP;
+		spriteHeight = yCtr - 1;
+	} while (yCtr != 1);
+}
+
+void GraphicsManager::initScreen(const Common::String &file, int mode, bool initializeScreen) {
+	Common::String filename = file + ".ini";
+	bool fileFoundFl = false;
+
+	byte *ptr = _vm->_fileIO->searchCat(filename, RES_INI, fileFoundFl);
+
+	if (!fileFoundFl) {
+		ptr = _vm->_fileIO->loadFile(filename);
+	}
+
+	if (!mode) {
+		filename = file + ".spr";
+		_vm->_globals->_levelSpriteBuf = _vm->_globals->freeMemory(_vm->_globals->_levelSpriteBuf);
+		if (initializeScreen) {
+			fileFoundFl = false;
+			_vm->_globals->_levelSpriteBuf = _vm->_fileIO->searchCat(filename, RES_SLI, fileFoundFl);
+			if (!fileFoundFl) {
+				_vm->_globals->_levelSpriteBuf = _vm->_fileIO->loadFile(filename);
+			} else {
+				_vm->_globals->_levelSpriteBuf = _vm->_fileIO->loadFile("RES_SLI.RES");
+			}
+		}
+	}
+	if (READ_BE_UINT24(ptr) != MKTAG24('I', 'N', 'I')) {
+		error("Invalid INI File %s", file.c_str());
+	} else {
+		bool doneFlag = false;
+		int dataOffset = 1;
+
+		do {
+			int dataVal1 = _vm->_script->handleOpcode(ptr + 20 * dataOffset);
+			if (_vm->shouldQuit())
+				return;
+
+			if (dataVal1 == 2)
+				dataOffset =  _vm->_script->handleGoto((ptr + 20 * dataOffset));
+			if (dataVal1 == 3)
+				dataOffset =  _vm->_script->handleIf(ptr, dataOffset);
+			if (dataOffset == -1)
+				error("Error, defective IFF");
+			if (dataVal1 == 1 || dataVal1 == 4)
+				++dataOffset;
+			if (!dataVal1 || dataVal1 == 5)
+				doneFlag = true;
+		} while (!doneFlag);
+	}
+	_vm->_globals->freeMemory(ptr);
+	_vm->_globals->_answerBuffer = _vm->_globals->freeMemory(_vm->_globals->_answerBuffer);
+
+	filename = file + ".rep";
+	fileFoundFl = false;
+	byte *dataP = _vm->_fileIO->searchCat(filename, RES_REP, fileFoundFl);
+	if (!fileFoundFl)
+		dataP = _vm->_fileIO->loadFile(filename);
+
+	_vm->_globals->_answerBuffer = dataP;
+	_vm->_objectsMan->_forceZoneFl = true;
+	_vm->_objectsMan->_changeVerbFl = false;
+}
+
+void GraphicsManager::displayScreen(bool initPalette) {
+	if (initPalette)
+		initColorTable(50, 65, _palette);
+
+	if (_lineNbr == SCREEN_WIDTH)
+		fillSurface(_frontBuffer, _colorTable, SCREEN_WIDTH * SCREEN_HEIGHT);
+	else if (_lineNbr == (SCREEN_WIDTH * 2))
+		fillSurface(_frontBuffer, _colorTable, SCREEN_WIDTH * SCREEN_HEIGHT * 2);
+
+	display8BitRect(_frontBuffer, _vm->_events->_startPos.x, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0);
+	memcpy(_backBuffer, _frontBuffer, 614399);
+	updateScreen();
+}
+
+void GraphicsManager::copyWinscanVbe(const byte *src, byte *dest) {
+	int destOffset = 0;
+	const byte *srcPtr = src;
+	for (;;) {
+		byte byteVal = *srcPtr;
+		if (byteVal == kByteStop)
+			return;
+		if (*srcPtr > kByteStop) {
+			if (byteVal == k8bVal) {
+				destOffset += srcPtr[1];
+				byteVal = srcPtr[2];
+				srcPtr += 2;
+			} else if (byteVal == k16bVal) {
+				destOffset += READ_LE_UINT16(srcPtr + 1);
+				byteVal = srcPtr[3];
+				srcPtr += 3;
+			} else {
+				destOffset += READ_LE_UINT32(srcPtr + 1);
+				byteVal = srcPtr[5];
+				srcPtr += 5;
+			}
+		}
+		dest[destOffset] = byteVal;
+		++srcPtr;
+		++destOffset;
+	}
+}
+
+// Reduce Screen
+void GraphicsManager::reduceScreenPart(const byte *srcSurface, byte *destSurface, int xp, int yp, int width, int height, int zoom) {
+	const byte *srcP = xp + _lineNbr2 * yp + srcSurface;
+	byte *destP = destSurface;
+	_zoomOutFactor = zoom;
+	_width = width;
+	_reduceX = 0;
+	_reducedY = 0;
+	if (zoom < 100) {
+		for (int yCtr = 0; yCtr < height; ++yCtr, srcP += _lineNbr2) {
+			_reducedY += _zoomOutFactor;
+			if (_reducedY < 100) {
+				_reduceX = 0;
+				const byte *lineSrcP = srcP;
+
+				for (int xCtr = 0; xCtr < _width; ++xCtr) {
+					_reduceX += _zoomOutFactor;
+					if (_reduceX < 100) {
+						*destP++ = *lineSrcP++;
+					} else {
+						_reduceX -= 100;
+						++lineSrcP;
+					}
+				}
+			} else {
+				_reducedY -= 100;
+			}
+		}
+	}
+}
+
+/**
+ * Draw horizontal line
+ */
+void GraphicsManager::drawHorizontalLine(byte *surface, int xp, int yp, uint16 width, byte col) {
+	memset(surface + xp + _lineNbr2 * yp, col, width);
+}
+
+/**
+ * Draw vertical line
+ */
+void GraphicsManager::drawVerticalLine(byte *surface, int xp, int yp, int height, byte col) {
+	byte *destP = surface + xp + _lineNbr2 * yp;
+
+	for (int yCtr = height; yCtr; yCtr--) {
+		*destP = col;
+		destP += _lineNbr2;
+	}
+}
+
+/**
+ * Backup the current screen
+ */
+void GraphicsManager::backupScreen() {
+	// Allocate a new data block for the screen, if necessary
+	if (_vm->_graphicsMan->_backupScreen == NULL)
+		_vm->_graphicsMan->_backupScreen = _vm->_globals->allocMemory(SCREEN_WIDTH * 2 * SCREEN_HEIGHT);
+
+	// Backup the screen
+	Common::copy(_vm->_graphicsMan->_backBuffer, _vm->_graphicsMan->_backBuffer +
+		SCREEN_WIDTH * 2 * SCREEN_HEIGHT, _vm->_graphicsMan->_backupScreen);
+}
+
+/**
+ * Restore a previously backed up screen
+ */
+void GraphicsManager::restoreScreen() {
+	assert(_vm->_graphicsMan->_backupScreen);
+
+	// Restore the screen and free the buffer
+	Common::copy(_vm->_graphicsMan->_backupScreen, _vm->_graphicsMan->_backupScreen +
+		SCREEN_WIDTH * 2 * SCREEN_HEIGHT, _vm->_graphicsMan->_backBuffer);
+	_vm->_globals->freeMemory(_vm->_graphicsMan->_backupScreen);
+	_backupScreen = NULL;
+}
+
+} // End of namespace Hopkins