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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.
*
* $URL$
* $Id$
*
*/
/*
* This code is based on Broken Sword 2.5 engine
*
* Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
*
* Licensed under GNU GPL v2
*
*/
// -----------------------------------------------------------------------------
// Includes
// -----------------------------------------------------------------------------
#include "sword25/gfx/image/b25sloader.h"
#include "sword25/gfx/image/pngloader.h"
namespace Sword25 {
#define BS_LOG_PREFIX "B25SLOADER"
// -----------------------------------------------------------------------------
namespace {
unsigned int FindEmbeddedPNG(const byte *FileDataPtr, unsigned int FileSize) {
if (memcmp(FileDataPtr, "BS25SAVEGAME", 12))
return 0;
#if 0
// Einen Stringstream mit dem Anfang der Datei intialisieren. 512 Byte sollten hierf�r gen�gen.
istringstream StringStream(string(FileDataPtr, FileDataPtr + min(static_cast<unsigned int>(512), FileSize)));
// Headerinformationen der Spielstandes einlesen.
string Marker, VersionID;
unsigned int CompressedGamedataSize, UncompressedGamedataSize;
StringStream >> Marker >> VersionID >> CompressedGamedataSize >> UncompressedGamedataSize;
if (!StringStream.good()) return 0;
// Testen, ob wir tats�chlich einen Spielstand haben.
if (Marker == "BS25SAVEGAME") {
// Offset zum PNG innerhalb des Spielstandes berechnen und zur�ckgeben.
return static_cast<unsigned int>(StringStream.tellg()) + CompressedGamedataSize + 1;
}
#else
warning("STUB:FindEmbeddedPNG()");
#endif
return 0;
}
}
// -----------------------------------------------------------------------------
bool B25SLoader::IsCorrectImageFormat(const byte *FileDataPtr, unsigned int FileSize) {
// PNG innerhalb des Spielstandes finden und den Methodenaufruf zu BS_PNGLoader weiterreichen.
unsigned int PNGOffset = FindEmbeddedPNG(FileDataPtr, FileSize);
if (PNGOffset > 0) {
return PNGLoader::DoIsCorrectImageFormat(FileDataPtr + PNGOffset, FileSize - PNGOffset);
}
return false;
}
// -----------------------------------------------------------------------------
bool B25SLoader::DecodeImage(const byte *FileDataPtr, unsigned int FileSize, GraphicEngine::COLOR_FORMATS ColorFormat, byte *&UncompressedDataPtr,
int &Width, int &Height, int &Pitch) {
// PNG innerhalb des Spielstandes finden und den Methodenaufruf zu BS_PNGLoader weiterreichen.
unsigned int PNGOffset = FindEmbeddedPNG(FileDataPtr, FileSize);
if (PNGOffset > 0) {
return PNGLoader::DoDecodeImage(FileDataPtr + PNGOffset, FileSize - PNGOffset, ColorFormat, UncompressedDataPtr, Width, Height, Pitch);
}
return false;
}
// -----------------------------------------------------------------------------
bool B25SLoader::ImageProperties(const byte *FileDataPtr, unsigned int FileSize, GraphicEngine::COLOR_FORMATS &ColorFormat, int &Width, int &Height) {
// PNG innerhalb des Spielstandes finden und den Methodenaufruf zu BS_PNGLoader weiterreichen.
unsigned int PNGOffset = FindEmbeddedPNG(FileDataPtr, FileSize);
if (PNGOffset > 0) {
return PNGLoader::DoImageProperties(FileDataPtr + PNGOffset, FileSize - PNGOffset, ColorFormat, Width, Height);
}
return false;
}
} // End of namespace Sword25
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