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text.cpp

/* 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.
 *
 * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-11-1/engines/kyra/text.cpp $
 * $Id: text.cpp 30944 2008-02-23 22:50:18Z sev $
 *
 */



#include "kyra/kyra.h"
#include "kyra/screen.h"
#include "kyra/text.h"

#include "common/events.h"
#include "common/system.h"
#include "common/endian.h"

namespace Kyra {

TextDisplayer::TextDisplayer(KyraEngine *vm, Screen *screen) {
      _screen = screen;
      _vm = vm;

      _talkCoords.y = 0x88;
      _talkCoords.x = 0;
      _talkCoords.w = 0;
      _talkMessageY = 0xC;
      _talkMessageH = 0;
      _talkMessagePrinted = false;
}

void TextDisplayer::setTalkCoords(uint16 y) {
      debugC(9, kDebugLevelMain, "TextDisplayer::setTalkCoords(%d)", y);
      _talkCoords.y = y;
}

int TextDisplayer::getCenterStringX(const char *str, int x1, int x2) {
      debugC(9, kDebugLevelMain, "TextDisplayer::getCenterStringX('%s', %d, %d)", str, x1, x2);
      _screen->_charWidth = -2;
      Screen::FontId curFont = _screen->setFont(Screen::FID_8_FNT);
      int strWidth = _screen->getTextWidth(str);
      _screen->setFont(curFont);
      _screen->_charWidth = 0;
      int w = x2 - x1 + 1;
      return x1 + (w - strWidth) / 2;
}

int TextDisplayer::getCharLength(const char *str, int len) {
      debugC(9, kDebugLevelMain, "TextDisplayer::getCharLength('%s', %d)", str, len);
      int charsCount = 0;
      if (*str) {
            _screen->_charWidth = -2;
            Screen::FontId curFont = _screen->setFont(Screen::FID_8_FNT);
            int i = 0;
            while (i <= len && *str) {
                  uint c = *str++;
                  c &= 0xFF;
                  if (c >= 0x7F && _vm->gameFlags().lang == Common::JA_JPN) {
                        c = READ_LE_UINT16(str - 1);
                        ++str;
                  }
                  i += _screen->getCharWidth(*str++);
                  ++charsCount;
            }
            _screen->setFont(curFont);
            _screen->_charWidth = 0;
      }
      return charsCount;
}

int TextDisplayer::dropCRIntoString(char *str, int offs) {
      debugC(9, kDebugLevelMain, "TextDisplayer::dropCRIntoString('%s', %d)", str, offs);
      int pos = 0;
      str += offs;
      while (*str) {
            if (*str == ' ') {
                  *str = '\r';
                  return pos;
            }
            ++str;
            ++pos;
      }
      return 0;
}

char *TextDisplayer::preprocessString(const char *str) {
      debugC(9, kDebugLevelMain, "TextDisplayer::preprocessString('%s')", str);
      if (str != _talkBuffer) {
            assert(strlen(str) < sizeof(_talkBuffer) - 1);
            strcpy(_talkBuffer, str);
      }
      char *p = _talkBuffer;
      while (*p) {
            if (*p == '\r') {
                  return _talkBuffer;
            }
            ++p;
      }
      p = _talkBuffer;
      Screen::FontId curFont = _screen->setFont(Screen::FID_8_FNT);
      _screen->_charWidth = -2;
      int textWidth = _screen->getTextWidth(p);
      _screen->_charWidth = 0;
      if (textWidth > 176) {
            if (textWidth > 352) {
                  int count = getCharLength(p, textWidth / 3);
                  int offs = dropCRIntoString(p, count);
                  p += count + offs;
                  _screen->_charWidth = -2;
                  textWidth = _screen->getTextWidth(p);
                  _screen->_charWidth = 0;
                  count = getCharLength(p, textWidth / 2);
                  dropCRIntoString(p, count);
            } else {
                  int count = getCharLength(p, textWidth / 2);
                  dropCRIntoString(p, count);
            }
      }
      _screen->setFont(curFont);
      return _talkBuffer;
}

int TextDisplayer::buildMessageSubstrings(const char *str) {
      debugC(9, kDebugLevelMain, "TextDisplayer::buildMessageSubstrings('%s')", str);
      int currentLine = 0;
      int pos = 0;
      while (*str) {
            if (*str == '\r') {
                  assert(currentLine < TALK_SUBSTRING_NUM);
                  _talkSubstrings[currentLine * TALK_SUBSTRING_LEN + pos] = '\0';
                  ++currentLine;
                  pos = 0;
            } else {
                  _talkSubstrings[currentLine * TALK_SUBSTRING_LEN + pos] = *str;
                  ++pos;
                  if (pos > TALK_SUBSTRING_LEN - 2) {
                        pos = TALK_SUBSTRING_LEN - 2;
                  }
            }
            ++str;
      }
      _talkSubstrings[currentLine * TALK_SUBSTRING_LEN + pos] = '\0';
      return currentLine + 1;
}

int TextDisplayer::getWidestLineWidth(int linesCount) {
      debugC(9, kDebugLevelMain, "TextDisplayer::getWidestLineWidth(%d)", linesCount);
      int maxWidth = 0;
      Screen::FontId curFont = _screen->setFont(Screen::FID_8_FNT);
      _screen->_charWidth = -2;
      for (int l = 0; l < linesCount; ++l) {
            int w = _screen->getTextWidth(&_talkSubstrings[l * TALK_SUBSTRING_LEN]);
            if (maxWidth < w) {
                  maxWidth = w;
            }
      }
      _screen->setFont(curFont);
      _screen->_charWidth = 0;
      return maxWidth;
}

void TextDisplayer::calcWidestLineBounds(int &x1, int &x2, int w, int cx) {
      debugC(9, kDebugLevelMain, "TextDisplayer::calcWidestLineBounds(%d, %d)", w, cx);
      x1 = cx - w / 2;
      if (x1 + w >= Screen::SCREEN_W - 12) {
            x1 = Screen::SCREEN_W - 12 - w - 1;
      } else if (x1 < 12) {
            x1 = 12;
      }
      x2 = x1 + w + 1;
}

void TextDisplayer::restoreTalkTextMessageBkgd(int srcPage, int dstPage) {
      debugC(9, kDebugLevelMain, "TextDisplayer::restoreTalkTextMessageBkgd(%d, %d)", srcPage, dstPage);
      if (_talkMessagePrinted) {
            _talkMessagePrinted = false;
            _screen->copyRegion(_talkCoords.x, _talkCoords.y, _talkCoords.x, _talkMessageY, _talkCoords.w, _talkMessageH, srcPage, dstPage);
      }
}

void TextDisplayer::printTalkTextMessage(const char *text, int x, int y, uint8 color, int srcPage, int dstPage) {
      debugC(9, kDebugLevelMain, "TextDisplayer::printTalkTextMessage('%s', %d, %d, %d, %d, %d)", text, x, y, color, srcPage, dstPage);
      char *str = preprocessString(text);
      int lineCount = buildMessageSubstrings(str);
      int top = y - lineCount * 10;
      if (top < 0) {
            top = 0;
      }
      _talkMessageY = top;
      _talkMessageH = lineCount * 10;
      int w = getWidestLineWidth(lineCount);
      int x1, x2;
      calcWidestLineBounds(x1, x2, w, x);
      _talkCoords.x = x1;
      _talkCoords.w = w + 2;
      _screen->copyRegion(_talkCoords.x, _talkMessageY, _talkCoords.x, _talkCoords.y, _talkCoords.w, _talkMessageH, srcPage, dstPage);
      int curPage = _screen->_curPage;
      _screen->_curPage = srcPage;
      for (int i = 0; i < lineCount; ++i) {
            top = i * 10 + _talkMessageY;
            char *msg = &_talkSubstrings[i * TALK_SUBSTRING_LEN];
            int left = getCenterStringX(msg, x1, x2);
            printText(msg, left, top, color, 0xC, 0);
      }
      _screen->_curPage = curPage;
      _talkMessagePrinted = true;
}

void TextDisplayer::printIntroTextMessage(const char *text, int x, int y, uint8 col1, uint8 col2, uint8 col3, int dstPage, Screen::FontId font) {
      debugC(9, kDebugLevelMain, "TextDisplayer::printIntroTextMessage('%s', %d, %d, %d, %d, %d, %d, %d)",
                  text, x, y, col1, col2, col3, dstPage, font);
      char *str = preprocessString(text);
      int lineCount = buildMessageSubstrings(str);
      int top = y - lineCount * 10;
      if (top < 0) {
            top = 0;
      }
      _talkMessageY = top;
      _talkMessageH = lineCount * 10;
      int w = getWidestLineWidth(lineCount);
      int x1, x2;
      calcWidestLineBounds(x1, x2, w, x);
      _talkCoords.x = x1;
      _talkCoords.w = w + 2;
      int curPage = _screen->setCurPage(dstPage);

      for (int i = 0; i < lineCount; ++i) {
            top = i * 10 + _talkMessageY;
            char *msg = &_talkSubstrings[i * TALK_SUBSTRING_LEN];
            int left = getCenterStringX(msg, x1, x2);
            printText(msg, left, top, col1, col2, col3, font);
      }
      _screen->_curPage = curPage;
      _talkMessagePrinted = true;
}

void TextDisplayer::printText(const char *str, int x, int y, uint8 c0, uint8 c1, uint8 c2, Screen::FontId font) {
      debugC(9, kDebugLevelMain, "TextDisplayer::printText('%s', %d, %d, %d, %d, %d)", str, x, y, c0, c1, c2);
      uint8 colorMap[] = { 0, 15, 12, 12 };
      colorMap[3] = c1;
      _screen->setTextColor(colorMap, 0, 3);
      Screen::FontId curFont = _screen->setFont(font);
      _screen->_charWidth = -2;
      _screen->printText(str, x, y, c0, c2);
      _screen->_charWidth = 0;
      _screen->setFont(curFont);
}

void TextDisplayer::printCharacterText(const char *text, int8 charNum, int charX) {
      debugC(9, kDebugLevelMain, "TextDisplayer::printCharacterText('%s', %d, %d)", text, charNum, charX);
      uint8 colorTable[] = {0x0F, 0x9, 0x0C9, 0x80, 0x5, 0x81, 0x0E, 0xD8, 0x55, 0x3A, 0x3a};
      int top, left, x1, x2, w, x;
      char *msg;

      uint8 color = colorTable[charNum];
      text = preprocessString(text);
      int lineCount = buildMessageSubstrings(text);
      w = getWidestLineWidth(lineCount);
      x = charX;
      calcWidestLineBounds(x1, x2, w, x);

      for (int i = 0; i < lineCount; ++i) {
            top = i * 10 + _talkMessageY;
            msg = &_talkSubstrings[i * TALK_SUBSTRING_LEN];
            left = getCenterStringX(msg, x1, x2);
            printText(msg, left, top, color, 0xC, 0);
      }
}
} // end of namespace Kyra

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