/* ScummVM - Scumm Interpreter * Copyright (C) 2001 Ludvig Strigeus * Copyright (C) 2001-2005 The ScummVM project * * 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 file 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * $Header$ * */ #include "common/stdafx.h" #include "common/scummsys.h" #include "common/system.h" #include "common/savefile.h" #include "common/scaler.h" #include "scumm.h" namespace Scumm { #define THMB_VERSION 1 #if !defined(__GNUC__) #pragma START_PACK_STRUCTS #endif struct ThumbnailHeader { uint32 type; uint32 size; byte version; uint16 width, height; byte bpp; } GCC_PACK; #if !defined(__GNUC__) #pragma END_PACK_STRUCTS #endif inline void colorToRGB(uint16 color, uint8 &r, uint8 &g, uint8 &b) { r = (((color >> 11) & 0x1F) << 3); g = (((color >> 5) & 0x3F) << 2); b = ((color&0x1F) << 3); } Graphics::Surface *ScummEngine::loadThumbnail(Common::InSaveFile *file) { ThumbnailHeader header; file->read(&header.type, 4); // We also accept the bad 'BMHT' header here, for the sake of compatibility // with some older savegames which were written incorrectly due to a bug in // ScummVM which wrote the thumb header type incorrectly on LE systems. if (header.type != MKID('THMB') && header.type != MKID('BMHT')) return 0; header.size = file->readUint32BE(); header.version = file->readByte(); if (header.version > THMB_VERSION) { file->skip(header.size - 9); warning("Loading a newer thumbnail version"); return 0; } header.width = file->readUint16BE(); header.height = file->readUint16BE(); header.bpp = file->readByte(); // TODO: support other bpp values than 2 if (header.bpp != 2) { file->skip(header.size - 14); return 0; } Graphics::Surface *thumb = new Graphics::Surface(); thumb->create(header.width, header.height, sizeof(uint16)); uint16* pixels = (uint16 *)thumb->pixels; for (int y = 0; y < thumb->h; ++y) { for (int x = 0; x < thumb->w; ++x) { uint8 r, g, b; colorToRGB(file->readUint16BE(), r, g, b); // converting to current OSystem Color *pixels++ = _system->RGBToColor(r, g, b); } } return thumb; } void ScummEngine::saveThumbnail(Common::OutSaveFile *file) { Graphics::Surface thumb; #ifndef DISABLE_HQ_SCALERS // fcn has dep on HQ_SCALERS: thumbnail gets created as empty if (!createThumbnailFromScreen(&thumb)) #endif thumb.create(kThumbnailWidth, kThumbnailHeight2, sizeof(uint16)); ThumbnailHeader header; header.type = MKID('THMB'); header.size = sizeof(header) + thumb.w*thumb.h*thumb.bytesPerPixel; header.version = THMB_VERSION; header.width = thumb.w; header.height = thumb.h; header.bpp = thumb.bytesPerPixel; file->write(&header.type, 4); file->writeUint32BE(header.size); file->writeByte(header.version); file->writeUint16BE(header.width); file->writeUint16BE(header.height); file->writeByte(header.bpp); // TODO: for later this shouldn't be casted to uint16... uint16* pixels = (uint16 *)thumb.pixels; for (uint16 p = 0; p < thumb.w*thumb.h; ++p, ++pixels) file->writeUint16BE(*pixels); thumb.free(); } } // end of namespace Scumm