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/* 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.
*
*/
#include "sherlock/saveload.h"
#include "sherlock/graphics.h"
#include "sherlock/sherlock.h"
#include "common/system.h"
#include "graphics/scaler.h"
#include "graphics/thumbnail.h"
namespace Sherlock {
SaveManager::SaveManager(SherlockEngine *vm, const Common::String &target) :
_vm(vm), _target(target) {
_saveThumb = nullptr;
}
SaveManager::~SaveManager() {
if (_saveThumb) {
_saveThumb->free();
delete _saveThumb;
}
}
/**
* Shows the in-game dialog interface for loading and saving games
*/
void SaveManager::show() {
createSavegameList();
// TODO
}
/**
* Build up a savegame list, with empty slots given an explicit Empty message
*/
void SaveManager::createSavegameList() {
_savegames.clear();
for (int idx = 0; idx < NUM_SAVEGAME_SLOTS; ++idx)
_savegames.push_back("-EMPTY");
SaveStateList saveList = getSavegameList(_target);
for (uint idx = 0; idx < saveList.size(); ++idx)
_savegames[saveList[idx].getSaveSlot()] = saveList[idx].getDescription();
}
/**
* Load a list of savegames
*/
SaveStateList SaveManager::getSavegameList(const Common::String &target) {
Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
Common::StringArray filenames;
Common::String saveDesc;
Common::String pattern = Common::String::format("%s.0??", target.c_str());
SherlockSavegameHeader header;
filenames = saveFileMan->listSavefiles(pattern);
sort(filenames.begin(), filenames.end()); // Sort to get the files in numerical order
SaveStateList saveList;
for (Common::StringArray::const_iterator file = filenames.begin(); file != filenames.end(); ++file) {
const char *ext = strrchr(file->c_str(), '.');
int slot = ext ? atoi(ext + 1) : -1;
if (slot >= 0 && slot < NUM_SAVEGAME_SLOTS) {
Common::InSaveFile *in = g_system->getSavefileManager()->openForLoading(*file);
if (in) {
readSavegameHeader(in, header);
saveList.push_back(SaveStateDescriptor(slot, header._saveName));
header._thumbnail->free();
delete header._thumbnail;
delete in;
}
}
}
return saveList;
}
const char *const SAVEGAME_STR = "SHLK";
#define SAVEGAME_STR_SIZE 4
bool SaveManager::readSavegameHeader(Common::InSaveFile *in, SherlockSavegameHeader &header) {
char saveIdentBuffer[SAVEGAME_STR_SIZE + 1];
header._thumbnail = nullptr;
// Validate the header Id
in->read(saveIdentBuffer, SAVEGAME_STR_SIZE + 1);
if (strncmp(saveIdentBuffer, SAVEGAME_STR, SAVEGAME_STR_SIZE))
return false;
header._version = in->readByte();
if (header._version > SHERLOCK_SAVEGAME_VERSION)
return false;
// Read in the string
header._saveName.clear();
char ch;
while ((ch = (char)in->readByte()) != '\0') header._saveName += ch;
// Get the thumbnail
header._thumbnail = Graphics::loadThumbnail(*in);
if (!header._thumbnail)
return false;
// Read in save date/time
header._year = in->readSint16LE();
header._month = in->readSint16LE();
header._day = in->readSint16LE();
header._hour = in->readSint16LE();
header._minute = in->readSint16LE();
header._totalFrames = in->readUint32LE();
return true;
}
void SaveManager::writeSavegameHeader(Common::OutSaveFile *out, SherlockSavegameHeader &header) {
// Write out a savegame header
out->write(SAVEGAME_STR, SAVEGAME_STR_SIZE + 1);
out->writeByte(SHERLOCK_SAVEGAME_VERSION);
// Write savegame name
out->write(header._saveName.c_str(), header._saveName.size());
out->writeByte('\0');
// Handle the thumbnail. If there's already one set by the game, create one
if (!_saveThumb)
createThumbnail();
Graphics::saveThumbnail(*out, *_saveThumb);
_saveThumb->free();
delete _saveThumb;
_saveThumb = nullptr;
// Write out the save date/time
TimeDate td;
g_system->getTimeAndDate(td);
out->writeSint16LE(td.tm_year + 1900);
out->writeSint16LE(td.tm_mon + 1);
out->writeSint16LE(td.tm_mday);
out->writeSint16LE(td.tm_hour);
out->writeSint16LE(td.tm_min);
out->writeUint32LE(_vm->_events->getFrameCounter());
}
/**
* Creates a thumbnail for the current on-screen contents
*/
void SaveManager::createThumbnail() {
if (_saveThumb) {
_saveThumb->free();
delete _saveThumb;
}
uint8 thumbPalette[PALETTE_SIZE];
_vm->_screen->getPalette(thumbPalette);
_saveThumb = new Graphics::Surface();
::createThumbnail(_saveThumb, (const byte *)_vm->_screen->getPixels(), SHERLOCK_SCREEN_WIDTH, SHERLOCK_SCREEN_HEIGHT, thumbPalette);
}
} // End of namespace Sherlock
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