mirror of
https://github.com/libretro/scummvm.git
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271 lines
7.5 KiB
C++
271 lines
7.5 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef COMMON_IFF_CONTAINER_H
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#define COMMON_IFF_CONTAINER_H
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#include "common/scummsys.h"
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#include "common/endian.h"
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#include "common/func.h"
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#include "common/stream.h"
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#include "common/textconsole.h"
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namespace Common {
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typedef uint32 IFF_ID;
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#define ID_FORM MKTAG('F','O','R','M')
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/* EA IFF 85 group identifier */
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#define ID_CAT MKTAG('C','A','T',' ')
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/* EA IFF 85 group identifier */
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#define ID_LIST MKTAG('L','I','S','T')
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/* EA IFF 85 group identifier */
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#define ID_PROP MKTAG('P','R','O','P')
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/* EA IFF 85 group identifier */
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#define ID_END MKTAG('E','N','D',' ')
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/* unofficial END-of-FORM identifier (see Amiga RKM Devices Ed.3
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page 376) */
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#define ID_ILBM MKTAG('I','L','B','M')
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/* EA IFF 85 raster bitmap form */
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#define ID_DEEP MKTAG('D','E','E','P')
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/* Chunky pixel image files (Used in TV Paint) */
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#define ID_RGB8 MKTAG('R','G','B','8')
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/* RGB image forms, Turbo Silver (Impulse) */
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#define ID_RGBN MKTAG('R','G','B','N')
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/* RGB image forms, Turbo Silver (Impulse) */
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#define ID_PBM MKTAG('P','B','M',' ')
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/* 256-color chunky format (DPaint 2 ?) */
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#define ID_ACBM MKTAG('A','C','B','M')
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/* Amiga Contiguous Bitmap (AmigaBasic) */
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#define ID_8SVX MKTAG('8','S','V','X')
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/* Amiga 8 bits voice */
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/* generic */
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#define ID_FVER MKTAG('F','V','E','R')
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/* AmigaOS version string */
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#define ID_JUNK MKTAG('J','U','N','K')
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/* always ignore this chunk */
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#define ID_ANNO MKTAG('A','N','N','O')
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/* EA IFF 85 Generic Annotation chunk */
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#define ID_AUTH MKTAG('A','U','T','H')
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/* EA IFF 85 Generic Author chunk */
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#define ID_CHRS MKTAG('C','H','R','S')
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/* EA IFF 85 Generic character string chunk */
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#define ID_NAME MKTAG('N','A','M','E')
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/* EA IFF 85 Generic Name of art, music, etc. chunk */
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#define ID_TEXT MKTAG('T','E','X','T')
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/* EA IFF 85 Generic unformatted ASCII text chunk */
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#define ID_copy MKTAG('(','c',')',' ')
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/* EA IFF 85 Generic Copyright text chunk */
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/* IFF chunks */
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#define ID_BMHD MKTAG('B','M','H','D')
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/* IFF BitmapHeader */
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#define ID_CMAP MKTAG('C','M','A','P')
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/* IFF 8bit RGB colormap */
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#define ID_GRAB MKTAG('G','R','A','B')
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/* IFF "hotspot" coordiantes */
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#define ID_DEST MKTAG('D','E','S','T')
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/* IFF destination image info */
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#define ID_SPRT MKTAG('S','P','R','T')
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/* IFF sprite identifier */
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#define ID_CAMG MKTAG('C','A','M','G')
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/* Amiga viewportmodes */
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#define ID_BODY MKTAG('B','O','D','Y')
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/* IFF image data */
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#define ID_CRNG MKTAG('C','R','N','G')
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/* color cycling */
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#define ID_CCRT MKTAG('C','C','R','T')
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/* color cycling */
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#define ID_CLUT MKTAG('C','L','U','T')
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/* Color Lookup Table chunk */
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#define ID_DPI MKTAG('D','P','I',' ')
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/* Dots per inch chunk */
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#define ID_DPPV MKTAG('D','P','P','V')
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/* DPaint perspective chunk (EA) */
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#define ID_DRNG MKTAG('D','R','N','G')
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/* DPaint IV enhanced color cycle chunk (EA) */
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#define ID_EPSF MKTAG('E','P','S','F')
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/* Encapsulated Postscript chunk */
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#define ID_CMYK MKTAG('C','M','Y','K')
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/* Cyan, Magenta, Yellow, & Black color map (Soft-Logik) */
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#define ID_CNAM MKTAG('C','N','A','M')
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/* Color naming chunk (Soft-Logik) */
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#define ID_PCHG MKTAG('P','C','H','G')
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/* Line by line palette control information (Sebastiano Vigna) */
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#define ID_PRVW MKTAG('P','R','V','W')
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/* A mini duplicate IFF used for preview (Gary Bonham) */
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#define ID_XBMI MKTAG('X','B','M','I')
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/* eXtended BitMap Information (Soft-Logik) */
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#define ID_CTBL MKTAG('C','T','B','L')
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/* Newtek Dynamic Ham color chunk */
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#define ID_DYCP MKTAG('D','Y','C','P')
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/* Newtek Dynamic Ham chunk */
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#define ID_SHAM MKTAG('S','H','A','M')
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/* Sliced HAM color chunk */
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#define ID_ABIT MKTAG('A','B','I','T')
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/* ACBM body chunk */
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#define ID_DCOL MKTAG('D','C','O','L')
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/* unofficial direct color */
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#define ID_DPPS MKTAG('D','P','P','S')
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/* ? */
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#define ID_TINY MKTAG('T','I','N','Y')
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/* ? */
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#define ID_DPPV MKTAG('D','P','P','V')
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/* ? */
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/* 8SVX chunks */
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#define ID_VHDR MKTAG('V','H','D','R')
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/* 8SVX Voice8Header */
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/**
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* Represents a IFF chunk available to client code.
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*
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* Client code must *not* deallocate _stream when done.
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*/
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struct IFFChunk {
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IFF_ID _type;
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uint32 _size;
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ReadStream *_stream;
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IFFChunk(IFF_ID type, uint32 size, ReadStream *stream) : _type(type), _size(size), _stream(stream) {
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assert(_stream);
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}
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};
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/**
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* Parser for IFF containers.
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*/
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class IFFParser {
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/**
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* This private class implements IFF chunk navigation.
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*/
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class IFFChunkNav : public ReadStream {
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protected:
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ReadStream *_input;
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uint32 _bytesRead;
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public:
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IFF_ID id;
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uint32 size;
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IFFChunkNav() : _input(0) {
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}
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void setInputStream(ReadStream *input) {
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_input = input;
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size = _bytesRead = 0;
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}
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void incBytesRead(uint32 inc) {
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_bytesRead += inc;
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if (_bytesRead > size) {
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error("Chunk overread");
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}
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}
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void readHeader() {
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id = _input->readUint32BE();
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size = _input->readUint32BE();
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_bytesRead = 0;
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}
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bool hasReadAll() const {
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return (size - _bytesRead) == 0;
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}
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void feed() {
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if (size % 2) {
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size++;
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}
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while (!hasReadAll()) {
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readByte();
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}
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}
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// ReadStream implementation
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bool eos() const { return _input->eos(); }
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bool err() const { return _input->err(); }
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void clearErr() { _input->clearErr(); }
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uint32 read(void *dataPtr, uint32 dataSize) {
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incBytesRead(dataSize);
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return _input->read(dataPtr, dataSize);
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}
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};
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protected:
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IFFChunkNav _formChunk; ///< The root chunk of the file.
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IFFChunkNav _chunk; ///< The current chunk.
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uint32 _formSize;
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IFF_ID _formType;
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ReadStream *_stream;
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bool _disposeStream;
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void setInputStream(ReadStream *stream);
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public:
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IFFParser(ReadStream *stream, bool disposeStream = false);
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~IFFParser();
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/**
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* Callback type for the parser.
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*/
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typedef Functor1< IFFChunk&, bool > IFFCallback;
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/**
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* Parse the IFF container, invoking the callback on each chunk encountered.
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* The callback can interrupt the parsing by returning 'true'.
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*/
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void parse(IFFCallback &callback);
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};
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/**
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* Decode a given PackBits encoded stream.
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*
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* PackBits is an RLE compression algorithm introduced by Apple. It is also
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* used to encode ILBM and PBM subtypes of IFF files, and some flavors of
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* TIFF.
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*
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* As there is no compression across row boundaries in the above formats,
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* read() will extract a *new* line on each call, discarding any alignment
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* or padding.
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*/
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class PackBitsReadStream : public Common::ReadStream {
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protected:
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Common::ReadStream *_input;
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public:
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PackBitsReadStream(Common::ReadStream &input);
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~PackBitsReadStream();
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virtual bool eos() const;
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uint32 read(void *dataPtr, uint32 dataSize);
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};
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} // namespace Common
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#endif
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