1 files changed, 255 insertions, 0 deletions
diff --git a/engines/dm/text.cpp b/engines/dm/text.cpp
new file mode 100644
index 0000000000..825c86a3b9
--- /dev/null
+++ b/engines/dm/text.cpp
@@ -0,0 +1,255 @@
+/* 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.
+*
+*/
+
+/*
+* Based on the Reverse Engineering work of Christophe Fontanel,
+* maintainer of the Dungeon Master Encyclopaedia (http://dmweb.free.fr/)
+*/
+
+#include "common/system.h"
+
+#include "dm/text.h"
+
+namespace DM {
+
+TextMan::TextMan(DMEngine *vm) : _vm(vm) {
+	_messageAreaCursorColumn = 0;
+	_messageAreaCursorRow = 0;
+	for (uint16 i = 0; i < 4; ++i)
+		_messageAreaRowExpirationTime[i] = 0;
+
+	_bitmapMessageAreaNewRow = new byte[320 * 7];
+	_isScrolling = false;
+	_startedScrollingAt = -1;
+	_messageAreaCopy = new byte[320 * 7 * 4];
+}
+
+TextMan::~TextMan() {
+	delete[] _bitmapMessageAreaNewRow;
+	delete[] _messageAreaCopy;
+}
+
+void TextMan::printTextToBitmap(byte *destBitmap, uint16 destByteWidth, int16 destX, int16 destY,
+								Color textColor, Color bgColor, const char *text, uint16 destHeight) {
+	if ((destX -= 1) < 0) // fixes missalignment, to be checked
+		destX = 0;
+	if ((destY -= 4) < 0) // fixes missalignment, to be checked
+		destY = 0;
+
+	uint16 destPixelWidth = destByteWidth * 2;
+
+	uint16 textLength = strlen(text);
+	uint16 nextX = destX;
+	uint16 nextY = destY;
+	byte *srcBitmap = _vm->_displayMan->getNativeBitmapOrGraphic(kDMGraphicIdxFont);
+
+	byte *tmp = _vm->_displayMan->_tmpBitmap;
+	for (uint16 i = 0; i < (kDMFontLetterWidth + 1) * kDMFontLetterHeight * 128; ++i)
+		tmp[i] = srcBitmap[i] ? textColor : bgColor;
+
+	srcBitmap = tmp;
+
+	for (const char *begin = text, *end = text + textLength; begin != end; ++begin) {
+		if (nextX + kDMFontLetterWidth + 1 >= destPixelWidth || (*begin == '\n')) {
+			nextX = destX;
+			nextY += kDMFontLetterHeight + 1;
+		}
+		if (nextY + kDMFontLetterHeight >= destHeight)
+			break;
+
+		uint16 srcX = (1 + 5) * *begin; // 1 + 5 is not the letter width, arbitrary choice of the unpacking code
+
+		Box box((nextX == destX) ? (nextX + 1) : nextX, nextX + kDMFontLetterWidth + 1, nextY, nextY + kDMFontLetterHeight - 1);
+		_vm->_displayMan->blitToBitmap(srcBitmap, destBitmap, box, (nextX == destX) ? (srcX + 1) : srcX, 0, 6 * 128 / 2, destByteWidth, kDMColorNoTransparency,
+									   kDMFontLetterHeight, destHeight);
+
+		nextX += kDMFontLetterWidth + 1;
+	}
+}
+
+void TextMan::printToLogicalScreen(uint16 destX, uint16 destY, Color textColor, Color bgColor, const char *text) {
+	printTextToBitmap(_vm->_displayMan->_bitmapScreen, _vm->_displayMan->_screenWidth / 2, destX, destY, textColor, bgColor, text, _vm->_displayMan->_screenHeight);
+}
+
+void TextMan::printToViewport(int16 posX, int16 posY, Color textColor, const char *text, Color bgColor) {
+	printTextToBitmap(_vm->_displayMan->_bitmapViewport, k112_byteWidthViewport, posX, posY, textColor, bgColor, text, k136_heightViewport);
+}
+
+void TextMan::printWithTrailingSpaces(byte *destBitmap, int16 destByteWidth, int16 destX, int16 destY, Color textColor,
+									  Color bgColor, const char *text, int16 requiredTextLength, int16 destHeight) {
+	Common::String str = text;
+	for (int16 i = str.size(); i < requiredTextLength; ++i)
+		str += ' ';
+	printTextToBitmap(destBitmap, destByteWidth, destX, destY, textColor, bgColor, str.c_str(), destHeight);
+}
+
+void TextMan::printLineFeed() {
+	printMessage(kDMColorBlack, "\n");
+}
+
+void TextMan::printMessage(Color color, const char *string, bool printWithScroll) {
+	uint16 characterIndex;
+	Common::String wrkString;
+
+	while (*string) {
+		if (*string == '\n') { /* New line */
+			string++;
+			if ((_messageAreaCursorColumn != 0) || (_messageAreaCursorRow != 0)) {
+				_messageAreaCursorColumn = 0;
+				createNewRow();
+			}
+		} else if (*string == ' ') {
+			string++;
+			if (_messageAreaCursorColumn != 53) {
+				printString(color, " "); // I'm not sure if this is like the original
+			}
+		} else {
+			characterIndex = 0;
+			do {
+				wrkString += *string++;
+				characterIndex++;
+			} while (*string && (*string != ' ') && (*string != '\n')); /* End of string, space or New line */
+			wrkString += '\0';
+			if (_messageAreaCursorColumn + characterIndex > 53) {
+				_messageAreaCursorColumn = 2;
+				createNewRow();
+			}
+			printString(color, wrkString.c_str());
+		}
+	}
+}
+
+void TextMan::createNewRow() {
+	if (_messageAreaCursorRow == 3) {
+		isTextScrolling(&_textScroller, true);
+		memset(_bitmapMessageAreaNewRow, kDMColorBlack, 320 * 7);
+		_isScrolling = true;
+		setScrollerCommand(&_textScroller, 1);
+
+		for (uint16 rowIndex = 0; rowIndex < 3; rowIndex++)
+			_messageAreaRowExpirationTime[rowIndex] = _messageAreaRowExpirationTime[rowIndex + 1];
+
+		_messageAreaRowExpirationTime[3] = -1;
+	} else
+		_messageAreaCursorRow++;
+}
+
+void TextMan::printString(Color color, const char* string) {
+	int16 stringLength = strlen(string);
+	if (isTextScrolling(&_textScroller, false))
+		printToLogicalScreen(_messageAreaCursorColumn * 6, (_messageAreaCursorRow * 7 - 1) + 177, color, kDMColorBlack, string);
+	else {
+		printTextToBitmap(_bitmapMessageAreaNewRow, k160_byteWidthScreen, _messageAreaCursorColumn * 6, 0, color, kDMColorBlack, string, 7);
+		_isScrolling = true;
+		if (isTextScrolling(&_textScroller, false))
+			setScrollerCommand(&_textScroller, 1);
+	}
+	_messageAreaCursorColumn += stringLength;
+	_messageAreaRowExpirationTime[_messageAreaCursorRow] = _vm->_gameTime + 200;
+
+}
+
+void TextMan::initialize() {
+	moveCursor(0, 3);
+	for (uint16 i = 0; i < 4; ++i)
+		_messageAreaRowExpirationTime[i] = -1;
+}
+
+void TextMan::moveCursor(int16 column, int16 row) {
+	if (column < 0)
+		column = 0;
+	else if (column >= 53)
+		column = 52;
+
+	_messageAreaCursorColumn = column;
+	if (row < 0)
+		row = 0;
+	else if (row >= 4)
+		row = 3;
+
+	_messageAreaCursorRow = row;
+}
+
+void TextMan::clearExpiredRows() {
+	_vm->_displayMan->_useByteBoxCoordinates = false;
+	Box displayBox;
+	displayBox._rect.left = 0;
+	displayBox._rect.right = 319;
+	for (uint16 rowIndex = 0; rowIndex < 4; rowIndex++) {
+		int32 expirationTime = _messageAreaRowExpirationTime[rowIndex];
+		if ((expirationTime == -1) || (expirationTime > _vm->_gameTime) || _isScrolling)
+			continue;
+		displayBox._rect.top = 172 + (rowIndex * 7);
+		displayBox._rect.bottom = displayBox._rect.top + 6;
+		isTextScrolling(&_textScroller, true);
+		_vm->_displayMan->fillBoxBitmap(_vm->_displayMan->_bitmapScreen, displayBox, kDMColorBlack, k160_byteWidthScreen, k200_heightScreen);
+		_messageAreaRowExpirationTime[rowIndex] = -1;
+	}
+}
+
+void TextMan::printEndGameString(int16 x, int16 y, Color textColor, const char* text) {
+	char modifiedString[50];
+
+	char *wrkStringPtr = modifiedString;
+	*wrkStringPtr = *text++;
+	while (*wrkStringPtr) {
+		if ((*wrkStringPtr >= 'A') && (*wrkStringPtr <= 'Z'))
+			*wrkStringPtr -= 64; /* Use the same font as the one used for scrolls */
+
+		wrkStringPtr++;
+		*wrkStringPtr = *text++;
+	}
+	printToLogicalScreen(x, y, textColor, kDMColorDarkestGray, modifiedString);
+}
+
+void TextMan::clearAllRows() {
+	isTextScrolling(&_textScroller, true);
+
+	Box tmpBox(0, 319, 169, 199);
+	_vm->_displayMan->fillScreenBox(tmpBox, kDMColorBlack);
+
+	_messageAreaCursorRow = 3;
+	_messageAreaCursorColumn = 0;
+	for (int16 rowIndex = 0; rowIndex < 4; rowIndex++)
+		_messageAreaRowExpirationTime[rowIndex] = -1;
+}
+
+void TextMan::updateMessageArea() {
+	if (_isScrolling) {
+		if (_startedScrollingAt == -1) {
+			_startedScrollingAt = g_system->getMillis();
+			memcpy(_messageAreaCopy, _vm->_displayMan->_bitmapScreen + (200 - 7 * 4) * 320, 320 * 7 * 4);
+		}
+
+		int linesToCopy = (g_system->getMillis() - _startedScrollingAt) / 50;
+		if (linesToCopy >= 7) {
+			linesToCopy = 7;
+			_startedScrollingAt = -1;
+			_isScrolling = false;
+		}
+		memcpy(_vm->_displayMan->_bitmapScreen + (200 - 7 * 4) * 320, _messageAreaCopy + linesToCopy * 320,
+				320 * (7 * 4 - linesToCopy));
+		memcpy(_vm->_displayMan->_bitmapScreen + (200 - linesToCopy) * 320, _bitmapMessageAreaNewRow, 320 * linesToCopy);
+	}
+}
+
+}