diff options
Diffstat (limited to 'engines/sword25/gfx/image/b25sloader.cpp')
| -rw-r--r-- | engines/sword25/gfx/image/b25sloader.cpp | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/engines/sword25/gfx/image/b25sloader.cpp b/engines/sword25/gfx/image/b25sloader.cpp new file mode 100644 index 0000000000..513e74ccea --- /dev/null +++ b/engines/sword25/gfx/image/b25sloader.cpp @@ -0,0 +1,119 @@ +/* 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 { +static Common::String LoadString(Common::ReadStream &In, uint MaxSize = 999) { + Common::String Result; + + char ch = (char)In.readByte(); + while ((ch != '\0') && (ch != ' ')) { + Result += ch; + if (Result.size() >= MaxSize) break; + ch = (char)In.readByte(); + } + + return Result; +} + +uint FindEmbeddedPNG(const byte *FileDataPtr, uint FileSize) { + if (memcmp(FileDataPtr, "BS25SAVEGAME", 12)) + return 0; + + // Read in the header + Common::MemoryReadStream stream(FileDataPtr, FileSize); + + // Headerinformationen der Spielstandes einlesen. + uint compressedGamedataSize; + LoadString(stream); + LoadString(stream); + Common::String gameSize = LoadString(stream); + compressedGamedataSize = atoi(gameSize.c_str()); + LoadString(stream); + + // Return the offset of where the thumbnail starts + return static_cast<uint>(stream.pos() + compressedGamedataSize); +} +} + +// ----------------------------------------------------------------------------- + +bool B25SLoader::IsCorrectImageFormat(const byte *FileDataPtr, uint FileSize) { + // PNG innerhalb des Spielstandes finden und den Methodenaufruf zu BS_PNGLoader weiterreichen. + uint PNGOffset = FindEmbeddedPNG(FileDataPtr, FileSize); + if (PNGOffset > 0) { + return PNGLoader::DoIsCorrectImageFormat(FileDataPtr + PNGOffset, FileSize - PNGOffset); + } + + return false; +} + +// ----------------------------------------------------------------------------- + +bool B25SLoader::DecodeImage(const byte *FileDataPtr, uint 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. + uint 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, uint FileSize, GraphicEngine::COLOR_FORMATS &ColorFormat, int &Width, int &Height) { + // PNG innerhalb des Spielstandes finden und den Methodenaufruf zu BS_PNGLoader weiterreichen. + uint PNGOffset = FindEmbeddedPNG(FileDataPtr, FileSize); + if (PNGOffset > 0) { + return PNGLoader::DoImageProperties(FileDataPtr + PNGOffset, FileSize - PNGOffset, ColorFormat, Width, Height); + } + + return false; +} + +} // End of namespace Sword25 |