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Diffstat (limited to 'engines/parallaction/iff.cpp')
| -rw-r--r-- | engines/parallaction/iff.cpp | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/engines/parallaction/iff.cpp b/engines/parallaction/iff.cpp deleted file mode 100644 index 43dcac3697..0000000000 --- a/engines/parallaction/iff.cpp +++ /dev/null @@ -1,276 +0,0 @@ -/* 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. - * - * $URL$ - * $Id$ - * - */ - - -#include "common/iff_container.h" -#include "common/stream.h" -#include "common/util.h" -#include "parallaction/iff.h" - -namespace Parallaction { - - -void IFFParser::setInputStream(Common::SeekableReadStream *stream) { - destroy(); - - assert(stream); - _stream = stream; - _startOffset = 0; - _endOffset = _stream->size(); - - _formType = 0; - _formSize = (uint32)-1; - - if (_stream->size() < 12) { - // this file is too small to be a valid IFF container - return; - } - - if (_stream->readUint32BE() != ID_FORM) { - // no FORM header was found - return; - } - - _formSize = _stream->readUint32BE(); - _formType = _stream->readUint32BE(); -} - -void IFFParser::destroy() { - _stream = 0; - _startOffset = _endOffset = 0; -} - -uint32 IFFParser::getFORMSize() const { - return _formSize; -} - -Common::IFF_ID IFFParser::getFORMType() const { - return _formType; -} - -uint32 IFFParser::moveToIFFBlock(Common::IFF_ID chunkName) { - uint32 size = (uint32)-1; - - _stream->seek(_startOffset + 0x0C); - - while ((uint)_stream->pos() < _endOffset) { - uint32 chunk = _stream->readUint32BE(); - uint32 size_temp = _stream->readUint32BE(); - - if (chunk != chunkName) { - _stream->seek((size_temp + 1) & (~1), SEEK_CUR); - assert((uint)_stream->pos() <= _endOffset); - } else { - size = size_temp; - break; - } - } - - return size; -} - -uint32 IFFParser::getIFFBlockSize(Common::IFF_ID chunkName) { - uint32 size = moveToIFFBlock(chunkName); - return size; -} - -bool IFFParser::loadIFFBlock(Common::IFF_ID chunkName, void *loadTo, uint32 ptrSize) { - uint32 chunkSize = moveToIFFBlock(chunkName); - - if (chunkSize == (uint32)-1) { - return false; - } - - uint32 loadSize = 0; - loadSize = MIN(ptrSize, chunkSize); - _stream->read(loadTo, loadSize); - return true; -} - -Common::SeekableReadStream *IFFParser::getIFFBlockStream(Common::IFF_ID chunkName) { - uint32 chunkSize = moveToIFFBlock(chunkName); - - if (chunkSize == (uint32)-1) { - return 0; - } - - uint32 pos = _stream->pos(); - return new Common::SeekableSubReadStream(_stream, pos, pos + chunkSize, false); -} - - -// ILBM decoder implementation - -ILBMDecoder::ILBMDecoder(Common::SeekableReadStream *in, bool disposeStream) : _in(in), _disposeStream(disposeStream), _hasHeader(false), _bodySize((uint32)-1), _paletteSize((uint32)-1) { - assert(in); - _parser.setInputStream(in); - - if (_parser.getFORMType() != ID_ILBM) { - return; - } - - _hasHeader = _parser.loadIFFBlock(ID_BMHD, &_header, sizeof(_header)); - if (!_hasHeader) { - return; - } - - _header.width = TO_BE_16(_header.width); - _header.height = TO_BE_16(_header.height); - - _paletteSize = _parser.getIFFBlockSize(ID_CMAP); - _bodySize = _parser.getIFFBlockSize(ID_BODY); -} - - -ILBMDecoder::~ILBMDecoder() { - if (_disposeStream) { - delete _in; - } -} - -uint32 ILBMDecoder::getWidth() { - assert(_hasHeader); - return _header.width; -} - -uint32 ILBMDecoder::getHeight() { - assert(_hasHeader); - return _header.height; -} - -uint32 ILBMDecoder::getNumColors() { - assert(_hasHeader); - return (1 << _header.depth); -} - -byte *ILBMDecoder::getPalette() { - assert(_paletteSize != (uint32)-1); - byte *palette = new byte[_paletteSize]; - assert(palette); - _parser.loadIFFBlock(ID_CMAP, palette, _paletteSize); - return palette; -} - -byte *ILBMDecoder::getBitmap(uint32 numPlanes, bool packPlanes) { - assert(_bodySize != (uint32)-1); - assert(numPlanes == 1 || numPlanes == 2 || numPlanes == 3 || numPlanes == 4 || numPlanes == 5 || numPlanes == 8); - - numPlanes = MIN(numPlanes, (uint32)_header.depth); - if (numPlanes > 4) { - packPlanes = false; - } - - uint32 bitmapSize = _header.width * _header.height; - uint32 bitmapWidth = _header.width; - if (packPlanes) { - bitmapSize /= (8 / numPlanes); - bitmapWidth /= (8 / numPlanes); - } - - Common::SeekableReadStream *bodyStream = _parser.getIFFBlockStream(ID_BODY); - assert(bodyStream); - - byte *bitmap = (byte*)calloc(bitmapSize, 1); - assert(bitmap); - - switch (_header.pack) { - case 1: { // PackBits compressed bitmap - Graphics::PackBitsReadStream stream(*bodyStream); - - byte *out = bitmap; - - // setup a buffer to hold enough data to build a line in the output - uint32 scanWidth = ((_header.width + 15)/16) << 1; - byte *scanBuffer = (byte*)malloc(scanWidth * _header.depth); - - for (uint i = 0; i < _header.height; ++i) { - byte *s = scanBuffer; - for (uint32 j = 0; j < _header.depth; ++j) { - stream.read(s, scanWidth); - s += scanWidth; - } - - planarToChunky(out, bitmapWidth, scanBuffer, scanWidth, numPlanes, packPlanes); - out += bitmapWidth; - } - - free(scanBuffer); - break; - } - default: - error("only RLE compressed ILBM files are supported"); - break; - } - - delete bodyStream; - - return bitmap; -} - - -void ILBMDecoder::planarToChunky(byte *out, uint32 width, byte *in, uint32 planeWidth, uint32 nPlanes, bool packPlanes) { - byte pix, ofs, bit; - byte *s; - - uint32 pixels = width; - if (packPlanes) { - pixels *= (8 / nPlanes); - } - - for (uint32 x = 0; x < pixels; ++x) { - - pix = 0; - ofs = x >> 3; - bit = 0x80 >> (x & 7); - - // first build a pixel by scanning all the usable planes in the input - s = in; - for (uint32 plane = 0; plane < nPlanes; ++plane) { - if (s[ofs] & bit) { - pix |= (1 << plane); - } - s += planeWidth; - } - - - // then output the pixel according to the requested packing - if (!packPlanes) { - out[x] = pix; - } else - if (nPlanes == 1) { - out[x/8] |= (pix << (x & 7)); - } else - if (nPlanes == 2) { - out[x/4] |= (pix << ((x & 3) << 1)); - } else - if (nPlanes == 4) { - out[x/2] |= (pix << ((x & 1) << 2)); - } - } - -} - - -} // End of namespace Parallaction |