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


#include "common/endian.h"
#include "common/stream.h"

#include "cine/cine.h"
#include "cine/various.h"

namespace Cine {

uint16 bgVar0;
byte *additionalBgTable[9];
byte currentAdditionalBgIdx = 0, currentAdditionalBgIdx2 = 0;

void loadCtHigh(byte * currentPtr) {
      memcpy(page3Raw, currentPtr, 320 * 200);
}

byte loadCt(const char *ctName) {
      uint16 header[32];
      byte *ptr, *dataPtr;

      if (currentCtName != ctName)
            strcpy(currentCtName, ctName);

      ptr = dataPtr = readBundleFile(findFileInBundle(ctName));

      if (g_cine->getGameType() == Cine::GType_OS) {
            uint16 bpp = READ_BE_UINT16(ptr); ptr += 2;
            if (bpp == 8) {
                  ptr += 3 * 256;
                  loadCtHigh(ptr);
            } else {
                  ptr += 32;
                  gfxResetRawPage(page3Raw);
                  gfxConvertSpriteToRaw(page3Raw, ptr, 160, 200);
            }
      } else {
            loadRelatedPalette(ctName);

            assert(strstr(ctName, ".NEO"));

            Common::MemoryReadStream readS(ptr, 32);

            for (int i = 0; i < 16; i++) {
                  header[i] = readS.readUint16BE();
            }

            gfxConvertSpriteToRaw(page3Raw, ptr + 0x80, 160, 200);
      }

      free(dataPtr);
      return 0;
}

void loadBgHigh(const char *currentPtr) {
      memcpy(palette256, currentPtr, 256 * 3);
      currentPtr += 256 * 3;

      memcpy(page2Raw, currentPtr, 320 * 200);

      colorMode256 = 1;
}

byte loadBg(const char *bgName) {
      byte *ptr, *dataPtr;

      if (currentBgName[0] != bgName)
            strcpy(currentBgName[0], bgName);

      byte fileIdx = findFileInBundle(bgName);
      ptr = dataPtr = readBundleFile(fileIdx);

      uint16 bpp = READ_BE_UINT16(ptr); ptr += 2;
      if (bpp == 8) {
            loadBgHigh((const char *)ptr);
      } else {
            colorMode256 = 0;

            for (int i = 0; i < 16; i++) {
                  tempPalette[i] = READ_BE_UINT16(ptr);
                  ptr += 2;
            }

            if (g_cine->getGameType() == Cine::GType_FW) {
                  loadRelatedPalette(bgName);
            }

            gfxResetRawPage(page2Raw);
            gfxConvertSpriteToRaw(page2Raw, ptr, 160, 200);
      }
      free(dataPtr);
      return 0;
}

void addBackground(const char *bgName, uint16 bgIdx) {
      byte *ptr, *dataPtr;

      strcpy(currentBgName[bgIdx], bgName);

      byte fileIdx = findFileInBundle(bgName);
      ptr = dataPtr = readBundleFile(fileIdx);

      additionalBgTable[bgIdx] = (byte *) malloc(320 * 200);

      uint16 bpp = READ_BE_UINT16(ptr); ptr += 2;
      if (bpp == 8) {
            ptr += 3 * 256;
            memcpy(additionalBgTable[bgIdx], ptr, 320 * 200);
      } else {
            ptr += 32;
            gfxConvertSpriteToRaw(additionalBgTable[bgIdx], ptr, 160, 200);
      }
      free(dataPtr);
}

} // End of namespace Cine

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