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verbs.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001-2004 The ScummVM project
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/scumm/verbs.cpp,v 1.114 2004/11/21 14:48:17 fingolfin Exp $
 *
 */

#include "stdafx.h"
#include "scumm/charset.h"
#include "scumm/intern.h"
#include "scumm/object.h"
#include "scumm/resource.h"
#include "scumm/scumm.h"
#include "scumm/verbs.h"

namespace Scumm {

enum {
      kInventoryUpArrow = 4,
      kInventoryDownArrow = 5,
      kSentenceLine = 6
};

void ScummEngine_v2::initV2MouseOver() {
      int i;
      int arrow_color, color, hi_color;

      if (_version == 1) {
            color = 16;
            hi_color = 7;
            arrow_color = 6;
      } else {
            color = 13;
            hi_color = 14;
            arrow_color = 1;
      }

      v2_mouseover_box = -1;

      // Inventory items

      for (i = 0; i < 2; i++) {
            v2_mouseover_boxes[2 * i].rect.left = 0;
            v2_mouseover_boxes[2 * i].rect.right = 144;
            v2_mouseover_boxes[2 * i].rect.top = 32 + 8 * i;
            v2_mouseover_boxes[2 * i].rect.bottom = v2_mouseover_boxes[2 * i].rect.top + 8;

            v2_mouseover_boxes[2 * i].color = color;
            v2_mouseover_boxes[2 * i].hicolor = hi_color;


            v2_mouseover_boxes[2 * i + 1].rect.left = 176;
            v2_mouseover_boxes[2 * i + 1].rect.right = 320;
            v2_mouseover_boxes[2 * i + 1].rect.top = v2_mouseover_boxes[2 * i].rect.top;
            v2_mouseover_boxes[2 * i + 1].rect.bottom = v2_mouseover_boxes[2 * i].rect.bottom;

            v2_mouseover_boxes[2 * i + 1].color = color;
            v2_mouseover_boxes[2 * i + 1].hicolor = hi_color;
      }

      // Inventory arrows

      v2_mouseover_boxes[kInventoryUpArrow].rect.left = 144;
      v2_mouseover_boxes[kInventoryUpArrow].rect.right = 176;
      v2_mouseover_boxes[kInventoryUpArrow].rect.top = 32;
      v2_mouseover_boxes[kInventoryUpArrow].rect.bottom = 40;

      v2_mouseover_boxes[kInventoryUpArrow].color = arrow_color;
      v2_mouseover_boxes[kInventoryUpArrow].hicolor = hi_color;

      v2_mouseover_boxes[kInventoryDownArrow].rect.left = 144;
      v2_mouseover_boxes[kInventoryDownArrow].rect.right = 176;
      v2_mouseover_boxes[kInventoryDownArrow].rect.top = 40;
      v2_mouseover_boxes[kInventoryDownArrow].rect.bottom = 48;

      v2_mouseover_boxes[kInventoryDownArrow].color = arrow_color;
      v2_mouseover_boxes[kInventoryDownArrow].hicolor = hi_color;

      // Sentence line

      v2_mouseover_boxes[kSentenceLine].rect.left = 0;
      v2_mouseover_boxes[kSentenceLine].rect.right = 320;
      v2_mouseover_boxes[kSentenceLine].rect.top = 0;
      v2_mouseover_boxes[kSentenceLine].rect.bottom = 8;

      v2_mouseover_boxes[kSentenceLine].color = color;
      v2_mouseover_boxes[kSentenceLine].hicolor = hi_color;
}

void ScummEngine::checkV2MouseOver(Common::Point pos) {
      VirtScreen *vs = &virtscr[kVerbVirtScreen];
      Common::Rect rect;
      byte *ptr, *dst;
      int i, x, y, new_box = -1;

      // Don't do anything unless the inventory is active
      if (!(_userState & 64)) {
            v2_mouseover_box = -1;
            return;
      }

      if (_cursor.state > 0) {
            for (i = 0; i < ARRAYSIZE(v2_mouseover_boxes); i++) {
                  if (v2_mouseover_boxes[i].rect.contains(pos.x, pos.y - vs->topline)) {
                        new_box = i;
                        break;
                  }
            }
      }

      if (new_box != v2_mouseover_box) {
            if (v2_mouseover_box != -1) {
                  rect = v2_mouseover_boxes[v2_mouseover_box].rect;

                  dst = ptr = vs->getPixels(rect.left, rect.top);

                  // Remove highlight.
                  for (y = rect.height() - 1; y >= 0; y--) {
                        for (x = rect.width() - 1; x >= 0; x--) {
                              if (dst[x] == v2_mouseover_boxes[v2_mouseover_box].hicolor)
                                    dst[x] = v2_mouseover_boxes[v2_mouseover_box].color;
                        }
                        dst += vs->pitch;
                  }

                  markRectAsDirty(kVerbVirtScreen, rect);
            }

            if (new_box != -1) {
                  rect = v2_mouseover_boxes[new_box].rect;

                  dst = ptr = vs->getPixels(rect.left, rect.top);

                  // Apply highlight
                  for (y = rect.height() - 1; y >= 0; y--) {
                        for (x = rect.width() - 1; x >= 0; x--) {
                              if (dst[x] == v2_mouseover_boxes[new_box].color)
                                    dst[x] = v2_mouseover_boxes[new_box].hicolor;
                        }
                        dst += vs->pitch;
                  }

                  markRectAsDirty(kVerbVirtScreen, rect);
            }

            v2_mouseover_box = new_box;
      }
}

void ScummEngine::checkV2Inventory(int x, int y) {
      int object = 0;

      y -= virtscr[kVerbVirtScreen].topline;

      if ((y < 34) || !(_mouseButStat & MBS_LEFT_CLICK)) 
            return;

      if (v2_mouseover_boxes[kInventoryUpArrow].rect.contains(x, y)) {
            if (_inventoryOffset >= 2) {
                  _inventoryOffset -= 2;
                  redrawV2Inventory();
            }
      } else if (v2_mouseover_boxes[kInventoryDownArrow].rect.contains(x, y)) {
            if (_inventoryOffset + 4 < getInventoryCount(_scummVars[VAR_EGO])) {
                  _inventoryOffset += 2;
                  redrawV2Inventory();
            }
      }

      for (object = 0; object < 4; object++) {
            if (v2_mouseover_boxes[object].rect.contains(x, y)) {
                  break;
            }
      }

      if (object >= 4)
            return;

      object = findInventory(_scummVars[VAR_EGO], object + 1 + _inventoryOffset);
      if (object > 0) {
            runInputScript(3, object, 0);
      }
}

void ScummEngine::redrawV2Inventory() {
      VirtScreen *vs = &virtscr[kVerbVirtScreen];
      int i;
      int max_inv;
      Common::Rect inventoryBox;

      v2_mouseover_box = -1;

      if (!(_userState & 64)) // Don't draw inventory unless active
            return;

      // Clear on all invocations
      inventoryBox.top = vs->topline + 32;
      inventoryBox.bottom = vs->topline + virtscr[2].h;
      inventoryBox.left = 0;
      inventoryBox.right = vs->w;
      restoreBG(inventoryBox);

      _string[1].charset = 1;

      max_inv = getInventoryCount(_scummVars[VAR_EGO]) - _inventoryOffset;
      if (max_inv > 4)
            max_inv = 4;
      for (i = 0; i < max_inv; i++) {
            int obj = findInventory(_scummVars[VAR_EGO], i + 1 + _inventoryOffset);
            if (obj == 0)
                  break;
            
            _string[1].ypos = v2_mouseover_boxes[i].rect.top + vs->topline;
            _string[1].xpos = v2_mouseover_boxes[i].rect.left;

            _string[1].color = v2_mouseover_boxes[i].color;

            const byte *tmp = getObjOrActorName(obj);
            assert(tmp);

            // Prevent inventory entries from overflowing by truncating the text
            // after 144/8 = 18 chars
            byte msg[18 + 1];
            msg[18] = 0;
            strncpy((char *)msg, (const char *)tmp, 18);
            
            // Draw it
            drawString(1, msg);
      }


      // If necessary, draw "up" arrow
      if (_inventoryOffset > 0) {
            _string[1].xpos = v2_mouseover_boxes[kInventoryUpArrow].rect.left;
            _string[1].ypos = v2_mouseover_boxes[kInventoryUpArrow].rect.top + vs->topline;
            _string[1].color = v2_mouseover_boxes[kInventoryUpArrow].color;
            drawString(1, (const byte *)" \1\2");
      }

      // If necessary, draw "down" arrow
      if (_inventoryOffset + 4 < getInventoryCount(_scummVars[VAR_EGO])) {
            _string[1].xpos = v2_mouseover_boxes[kInventoryDownArrow].rect.left;
            _string[1].ypos = v2_mouseover_boxes[kInventoryDownArrow].rect.top + vs->topline;
            _string[1].color = v2_mouseover_boxes[kInventoryDownArrow].color;
            drawString(1, (const byte *)" \3\4");
      }
}

void ScummEngine::redrawVerbs() {
      if (_version <= 2 && !(_userState & 128)) // Don't draw verbs unless active
            return;

      int i, verb = 0;
      if (_cursor.state > 0)
            verb = findVerbAtPos(_mouse.x, _mouse.y);

      for (i = _numVerbs-1; i >= 0; i--) {
            if (i == verb && _verbs[verb].hicolor)
                  drawVerb(i, 1);
            else
                  drawVerb(i, 0);
      }
      _verbMouseOver = verb;
}

void ScummEngine::checkExecVerbs() {
      int i, over;
      VerbSlot *vs;

      if (_userPut <= 0 || _mouseButStat == 0)
            return;

      if (_mouseButStat < MBS_MAX_KEY) {
            /* Check keypresses */
            vs = &_verbs[1];
            for (i = 1; i < _numVerbs; i++, vs++) {
                  if (vs->verbid && vs->saveid == 0 && vs->curmode == 1) {
                        if (_mouseButStat == vs->key) {
                              // Trigger verb as if the user clicked it
                              runInputScript(1, vs->verbid, 1);
                              return;
                        }
                  }
            }
            
            if (_gameId == GID_INDY4 && _mouseButStat >= '0' && _mouseButStat <= '9') {
                  // To support keyboard fighting in FOA, we need to remap the number keys.
                  // FOA apparently expects PC scancode values (see script 46 if you want
                  // to know where I got these numbers from).
                  static const int numpad[10] = {
                              '0',
                              335, 336, 337,
                              331, 332, 333,
                              327, 328, 329
                        };
                  _mouseButStat = numpad[_mouseButStat - '0'];
            }
            
            // Generic keyboard input
            runInputScript(4, _mouseButStat, 1);
      } else if (_mouseButStat & MBS_MOUSE_MASK) {
            VirtScreen *zone = findVirtScreen(_mouse.y);
            byte code = _mouseButStat & MBS_LEFT_CLICK ? 1 : 2;
            if (_version <= 2 && zone->number == 2 && _mouse.y <= zone->topline + 8) {
                  // Click into V2 sentence line
                  runInputScript(5, 0, 0);
            } else if (_version <= 2 && zone->number == 2 && _mouse.y > zone->topline + 32) {
                  // Click into V2 inventory
                  checkV2Inventory(_mouse.x, _mouse.y);
            } else {
                  over = findVerbAtPos(_mouse.x, _mouse.y);
                  if (over != 0) {
                        // Verb was clicked
                        runInputScript(1, _verbs[over].verbid, code);
                  } else {
                        // Scene was clicked
                        runInputScript((zone->number == 0) ? 2 : 1, 0, code);
                  }
            }
      }
}

void ScummEngine::verbMouseOver(int verb) {
      // Don't do anything unless verbs are active
      if (_version <= 2 && !(_userState & 128))
            return;

      if (_gameId == GID_FT)
            return;

      if (_verbMouseOver == verb)
            return;

      if (_verbs[_verbMouseOver].type != kImageVerbType) {
            drawVerb(_verbMouseOver, 0);
            _verbMouseOver = verb;
      }

      if (_verbs[verb].type != kImageVerbType && _verbs[verb].hicolor) {
            drawVerb(verb, 1);
            _verbMouseOver = verb;
      }
}

int ScummEngine::findVerbAtPos(int x, int y) const {
      if (!_numVerbs)
            return 0;

      VerbSlot *vs;
      int i = _numVerbs - 1;

      vs = &_verbs[i];
      do {
            if (vs->curmode != 1 || !vs->verbid || vs->saveid || y < vs->curRect.top || y >= vs->curRect.bottom)
                  continue;
            if (vs->center) {
                  if (x < -(vs->curRect.right - 2 * vs->curRect.left) || x >= vs->curRect.right)
                        continue;
            } else {
                  if (x < vs->curRect.left || x >= vs->curRect.right)
                        continue;
            }

            return i;
      } while (--vs, --i);

      return 0;
}

void ScummEngine::drawVerb(int verb, int mode) {
      VerbSlot *vs;
      bool tmp;

      if (!verb)
            return;

      vs = &_verbs[verb];

      if (!vs->saveid && vs->curmode && vs->verbid) {
            if (vs->type == kImageVerbType) {
                  drawVerbBitmap(verb, vs->curRect.left, vs->curRect.top);
                  return;
            }
            
            restoreVerbBG(verb);

            _string[4].charset = vs->charset_nr;
            _string[4].xpos = vs->curRect.left;
            _string[4].ypos = vs->curRect.top;
            _string[4].right = _screenWidth - 1;
            _string[4].center = vs->center;

            if (vs->curmode == 2)
                  _string[4].color = vs->dimcolor;
            else if (mode && vs->hicolor)
                  _string[4].color = vs->hicolor;
            else
                  _string[4].color = vs->color;

            // FIXME For the future: Indy3 and under inv scrolling
            /*
               if (verb >= 31 && verb <= 36) 
               verb += _inventoryOffset;
             */

            const byte *msg = getResourceAddress(rtVerb, verb);
            if (!msg)
                  return;

            tmp = _charset->_center;
            _charset->_center = 0;
            drawString(4, msg);
            _charset->_center = tmp;

            vs->curRect.right = _charset->_str.right;
            vs->curRect.bottom = _charset->_str.bottom;
            vs->oldRect = _charset->_str;
            _charset->_str.left = _charset->_str.right;
      } else if (_gameId != GID_FT) {
            restoreVerbBG(verb);
      }
}

void ScummEngine::restoreVerbBG(int verb) {

      VerbSlot *vs;

      vs = &_verbs[verb];

      if (_gameId == GID_FT) {
            restoreBG(vs->curRect, vs->bkcolor);
      } else if (vs->oldRect.left != -1) {
            restoreBG(vs->oldRect, vs->bkcolor);
            vs->oldRect.left = -1;
      }
}

void ScummEngine::drawVerbBitmap(int verb, int x, int y) {
      VirtScreen *vs;
      VerbSlot *vst;
      bool twobufs;
      const byte *imptr = 0;
      int ydiff, xstrip;
      int imgw, imgh;
      int i, tmp;
      byte *obim;
      const ImageHeader *imhd;
      uint32 size;

      if ((vs = findVirtScreen(y)) == NULL)
            return;

      gdi.disableZBuffer();

      twobufs = vs->hasTwoBuffers;
      vs->hasTwoBuffers = 0;

      xstrip = x / 8;
      ydiff = y - vs->topline;

      obim = getResourceAddress(rtVerb, verb);
      assert(obim);
      if (_features & GF_OLD_BUNDLE) {
            imgw = obim[0];
            imgh = obim[1] / 8;
            imptr = obim + 2;
      } else if (_features & GF_SMALL_HEADER) {
            size = READ_LE_UINT32(obim);

            imgw = (*(obim + size + 11));
            imgh = (*(obim + size + 17)) / 8;
            imptr = getObjectImage(obim, 1);
      } else {
            imhd = (const ImageHeader *)findResourceData(MKID('IMHD'), obim);
            if (_version >= 7) {
                  imgw = READ_LE_UINT16(&imhd->v7.width) / 8;
                  imgh = READ_LE_UINT16(&imhd->v7.height) / 8;
            } else {
                  imgw = READ_LE_UINT16(&imhd->old.width) / 8;
                  imgh = READ_LE_UINT16(&imhd->old.height) / 8;
            }
            imptr = getObjectImage(obim, 1);
      }
      assert(imptr);
      if (_version == 1) {
            gdi._C64ObjectMode = true;
            gdi.decodeC64Gfx(imptr, gdi._C64ObjectMap, imgw * imgh * 3);
      }
      for (i = 0; i < imgw; i++) {
            tmp = xstrip + i;
            gdi.drawBitmap(imptr, vs, tmp, ydiff, imgw * 8, imgh * 8, i, 1, Gdi::dbAllowMaskOr);
      }

      vst = &_verbs[verb];
      vst->curRect.right = vst->curRect.left + imgw * 8;
      vst->curRect.bottom = vst->curRect.top + imgh * 8;
      vst->oldRect = vst->curRect;

      gdi.enableZBuffer();

      vs->hasTwoBuffers = twobufs;
}

int ScummEngine::getVerbSlot(int id, int mode) const {
      int i;
      for (i = 1; i < _numVerbs; i++) {
            if (_verbs[i].verbid == id && _verbs[i].saveid == mode) {
                  return i;
            }
      }
      return 0;
}

void ScummEngine::killVerb(int slot) {
      VerbSlot *vs;

      if (slot == 0)
            return;

      vs = &_verbs[slot];
      vs->verbid = 0;
      vs->curmode = 0;

      nukeResource(rtVerb, slot);

      if (_version <= 6 && vs->saveid == 0) {
            drawVerb(slot, 0);
            verbMouseOver(0);
      }
      vs->saveid = 0;
}

void ScummEngine::setVerbObject(uint room, uint object, uint verb) {
      const byte *obimptr;
      const byte *obcdptr;
      uint32 size, size2;
      FindObjectInRoom foir;
      int i;

      if (_heversion >= 70) { // Windows titles. Here we always ignore room
            room = getObjectRoom(object);
      }

      if (whereIsObject(object) == WIO_FLOBJECT)
            error("Can't grab verb image from flobject");

      if (_features & GF_OLD_BUNDLE) {
            for (i = (_numLocalObjects-1); i > 0; i--) {
                  if (_objs[i].obj_nr == object) {
                        findObjectInRoom(&foir, foImageHeader, object, room);
                        size = READ_LE_UINT16(foir.obim);
                        byte *ptr = createResource(rtVerb, verb, size + 2);
                        obcdptr = getResourceAddress(rtRoom, room) + getOBCDOffs(object);
                        ptr[0] = *(obcdptr + 9);      // Width
                        ptr[1] = *(obcdptr + 15);     // Height
                        memcpy(ptr + 2, foir.obim, size);
                        return;
                  }
            }
      } else if (_features & GF_SMALL_HEADER) {
            for (i = (_numLocalObjects-1); i > 0; i--) {
                  if (_objs[i].obj_nr == object) {
                        // FIXME - the only thing we need from the OBCD is the image size!
                        // So we could use almost the same code (save for offsets)
                        // as in the GF_OLD_BUNDLE code. But of course that would break save games
                        // unless we insert special conversion code... <sigh>
                        findObjectInRoom(&foir, foImageHeader, object, room);
                        size = READ_LE_UINT32(foir.obim);
                        obcdptr = getResourceAddress(rtRoom, room) + getOBCDOffs(object);
                        size2 = READ_LE_UINT32(obcdptr);
                        createResource(rtVerb, verb, size + size2);
                        obimptr = getResourceAddress(rtRoom, room) - foir.roomptr + foir.obim;
                        obcdptr = getResourceAddress(rtRoom, room) + getOBCDOffs(object);
                        memcpy(getResourceAddress(rtVerb, verb), obimptr, size);
                        memcpy(getResourceAddress(rtVerb, verb) + size, obcdptr, size2);
                        return;
                  }
            }
      } else {
            findObjectInRoom(&foir, foImageHeader, object, room);
            size = READ_BE_UINT32(foir.obim + 4);
            createResource(rtVerb, verb, size);
            obimptr = getResourceAddress(rtRoom, room) - foir.roomptr + foir.obim;
            memcpy(getResourceAddress(rtVerb, verb), obimptr, size);
      }
}

} // End of namespace Scumm

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