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vga_s1.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/agos/vga_s1.cpp $
 * $Id: vga_s1.cpp 30944 2008-02-23 22:50:18Z sev $
 *
 */



#include "agos/agos.h"
#include "agos/intern.h"
#include "agos/vga.h"

namespace AGOS {

void AGOSEngine_Simon1::setupVideoOpcodes(VgaOpcodeProc *op) {
      AGOSEngine::setupVideoOpcodes(op);

      op[11] = &AGOSEngine::vc11_clearPathFinder;
      op[17] = &AGOSEngine::vc17_setPathfinderItem;
      op[22] = &AGOSEngine::vc22_setPaletteNew;
      op[32] = &AGOSEngine::vc32_copyVar;
      op[37] = &AGOSEngine::vc37_addToSpriteY;
      op[48] = &AGOSEngine::vc48_setPathFinder;
      op[59] = &AGOSEngine::vc59_ifSpeech;
      op[60] = &AGOSEngine::vc60_stopAnimation;
      op[61] = &AGOSEngine::vc61_setMaskImage;
      op[62] = &AGOSEngine::vc62_fastFadeOut;
      op[63] = &AGOSEngine::vc63_fastFadeIn;
}

void AGOSEngine::vc11_clearPathFinder() {
      memset(&_pathFindArray, 0, sizeof(_pathFindArray));
}

void AGOSEngine::vc17_setPathfinderItem() {
      uint16 a = vcReadNextWord();
      _pathFindArray[a - 1] = (const uint16 *)_vcPtr;

      int end = (getGameType() == GType_FF || getGameType() == GType_PP) ? 9999 : 999;
      while (readUint16Wrapper(_vcPtr) != end)
            _vcPtr += 4;
      _vcPtr += 2;
}

void AGOSEngine::vc22_setPaletteNew() {
      byte *offs, *palptr = 0, *src;
      uint16 a = 0, b, num, palSize = 0;

      a = vcReadNextWord();
      b = vcReadNextWord();

      if (getGameType() == GType_FF || getGameType() == GType_PP) {
            num = 256;
            palSize = 768;

            palptr = _displayPalette;
      } else {
            num = a == 0 ? 32 : 16;
            palSize = 96;

            palptr = &_displayPalette[(a * 64)];
      }

      offs = _curVgaFile1 + 6;
      src = offs + b * palSize;

      do {
            palptr[0] = src[0] * 4;
            palptr[1] = src[1] * 4;
            palptr[2] = src[2] * 4;
            palptr[3] = 0;

            palptr += 4;
            src += 3;
      } while (--num);

      _paletteFlag = 2;
      _vgaSpriteChanged++;
}

void AGOSEngine::vc32_copyVar() {
      uint16 a = vcReadVar(vcReadNextWord());
      vcWriteVar(vcReadNextWord(), a);
}

void AGOSEngine::vc37_addToSpriteY() {
      VgaSprite *vsp = findCurSprite();
      vsp->y += vcReadVar(vcReadNextWord());

      vsp->windowNum |= 0x8000;
      dirtyBackGround();
      _vgaSpriteChanged++;
}

void AGOSEngine::vc45_setSpriteX() {
      VgaSprite *vsp = findCurSprite();
      vsp->x = vcReadVar(vcReadNextWord());

      vsp->windowNum |= 0x8000;
      dirtyBackGround();
      _vgaSpriteChanged++;
}

void AGOSEngine::vc46_setSpriteY() {
      VgaSprite *vsp = findCurSprite();
      vsp->y = vcReadVar(vcReadNextWord());

      vsp->windowNum |= 0x8000;
      dirtyBackGround();
      _vgaSpriteChanged++;
}

void AGOSEngine::vc47_addToVar() {
      uint16 var = vcReadNextWord();
      vcWriteVar(var, vcReadVar(var) + vcReadVar(vcReadNextWord()));
}

void AGOSEngine::vc48_setPathFinder() {
      uint16 a = (uint16)_variableArrayPtr[12];
      const uint16 *p = _pathFindArray[a - 1];

      if (getGameType() == GType_FF || getGameType() == GType_PP) {
            VgaSprite *vsp = findCurSprite();
            int16 x, y, ydiff;
            int16 x1, y1, x2, y2;
            uint pos = 0;

            x = vsp->x;
            while (x >= (int16)readUint16Wrapper(p + 2)) {
                  p += 2;
                  pos++;
            }

            x1 = readUint16Wrapper(p);
            y1 = readUint16Wrapper(p + 1);
            x2 = readUint16Wrapper(p + 2);
            y2 = readUint16Wrapper(p + 3);

            if (x2 != 9999) {
                  ydiff = y2 - y1;
                  if (ydiff < 0) {
                        ydiff = -ydiff;
                        x = vsp->x & 7;
                        ydiff *= x;
                        ydiff /= 8;
                        ydiff = -ydiff;
                  } else {
                        x = vsp->x & 7;
                        ydiff *= x;
                        ydiff /= 8;
                  }
                  y1 += ydiff;
            }

            y = vsp->y;
            vsp->y = y1;
            checkScrollY(y1 - y, y1);

            _variableArrayPtr[11] = x1;
            _variableArrayPtr[13] = pos;
      } else {
            uint b = (uint16)_variableArray[13];
            p += b * 2 + 1;
            int c = _variableArray[14];

            int step;
            int y1, y2;
            int16 *vp;

            step = 2;
            if (c < 0) {
                  c = -c;
                  step = -2;
            }

            vp = &_variableArray[20];

            do {
                  y2 = readUint16Wrapper(p);
                  p += step;
                  y1 = readUint16Wrapper(p) - y2;

                  vp[0] = y1 / 2;
                  vp[1] = y1 - (y1 / 2);

                  vp += 2;
            } while (--c);
      }
}

void AGOSEngine::vc59_ifSpeech() {
      if (!_sound->isVoiceActive())
            vcSkipNextInstruction();
}

void AGOSEngine::vc61_setMaskImage() {
      VgaSprite *vsp = findCurSprite();

      vsp->image = vcReadVarOrWord();
      vsp->x += vcReadNextWord();
      vsp->y += vcReadNextWord();
      vsp->flags = kDFMasked | kDFSkipStoreBG;

      vsp->windowNum |= 0x8000;
      dirtyBackGround();
      _vgaSpriteChanged++;
}

} // End of namespace AGOS

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