//
// Stream.h
//
-// Copyright 1996 Derek B. Noonburg
+// Copyright 1996-2003 Glyph & Cog, LLC
//
//========================================================================
#ifndef STREAM_H
#define STREAM_H
-#ifdef __GNUC__
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif
#include "gtypes.h"
#include "Object.h"
+#ifndef NO_DECRYPTION
+class Decrypt;
+#endif
+class BaseStream;
+
//------------------------------------------------------------------------
enum StreamKind {
strCCITTFax,
strDCT,
strFlate,
+ strJBIG2,
+ strJPX,
strWeird // internal-use stream types
};
// Reset stream to beginning.
virtual void reset() = 0;
+ // Close down the stream.
+ virtual void close();
+
// Get next char from stream.
virtual int getChar() = 0;
// Get current position in file.
virtual int getPos() = 0;
- // Go to a position in the stream.
- virtual void setPos(int pos1);
+ // Go to a position in the stream. If <dir> is negative, the
+ // position is from the end of the file; otherwise the position is
+ // from the start of the file.
+ virtual void setPos(Guint pos, int dir = 0) = 0;
// Get PostScript command for the filter(s).
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
// Does this stream type potentially contain non-printable chars?
virtual GBool isBinary(GBool last = gTrue) = 0;
- // Get the base FileStream or SubStream of this stream.
- virtual Stream *getBaseStream() = 0;
-
- // Get the base file of this stream.
- virtual FILE *getFile() = 0;
+ // Get the BaseStream of this stream.
+ virtual BaseStream *getBaseStream() = 0;
// Get the dictionary associated with this stream.
virtual Dict *getDict() = 0;
// Returns the new stream.
Stream *addFilters(Object *dict);
+ // Tell this stream to ignore any length limitation -- this only
+ // applies to BaseStream subclasses, and is used as a hack to work
+ // around broken PDF files with incorrect stream lengths.
+ virtual void ignoreLength() {}
+
private:
Stream *makeFilter(char *name, Stream *str, Object *params);
int ref; // reference count
};
+//------------------------------------------------------------------------
+// BaseStream
+//
+// This is the base class for all streams that read directly from a file.
+//------------------------------------------------------------------------
+
+class BaseStream: public Stream {
+public:
+
+ BaseStream(Object *dictA);
+ virtual ~BaseStream();
+ virtual Stream *makeSubStream(Guint start, GBool limited,
+ Guint length, Object *dict) = 0;
+ virtual void setPos(Guint pos, int dir = 0) = 0;
+ virtual GBool isBinary(GBool last = gTrue) { return last; }
+ virtual BaseStream *getBaseStream() { return this; }
+ virtual Dict *getDict() { return dict.getDict(); }
+
+ // Get/set position of first byte of stream within the file.
+ virtual Guint getStart() = 0;
+ virtual void moveStart(int delta) = 0;
+
+#ifndef NO_DECRYPTION
+ // Set decryption for this stream.
+ virtual void doDecryption(Guchar *fileKey, int keyLength,
+ int objNum, int objGen);
+#endif
+
+#ifndef NO_DECRYPTION
+protected:
+
+ Decrypt *decrypt;
+#endif
+
+private:
+
+ Object dict;
+};
+
+//------------------------------------------------------------------------
+// FilterStream
+//
+// This is the base class for all streams that filter another stream.
+//------------------------------------------------------------------------
+
+class FilterStream: public Stream {
+public:
+
+ FilterStream(Stream *strA);
+ virtual ~FilterStream();
+ virtual void close();
+ virtual int getPos() { return str->getPos(); }
+ virtual void setPos(Guint pos, int dir = 0);
+ virtual BaseStream *getBaseStream() { return str->getBaseStream(); }
+ virtual Dict *getDict() { return str->getDict(); }
+ virtual void ignoreLength() { str->ignoreLength(); }
+
+protected:
+
+ Stream *str;
+};
+
//------------------------------------------------------------------------
// ImageStream
//------------------------------------------------------------------------
// Create an image stream object for an image with the specified
// parameters. Note that these are the actual image parameters,
// which may be different from the predictor parameters.
- ImageStream(Stream *str, int width, int nComps, int nBits);
+ ImageStream(Stream *strA, int widthA, int nCompsA, int nBitsA);
~ImageStream();
// at least nComps elements. Returns false at end of file.
GBool getPixel(Guchar *pix);
+ // Returns a pointer to the next line of pixels. Returns NULL at
+ // end of file.
+ Guchar *getLine();
+
// Skip an entire line from the image.
void skipLine();
// Create a predictor object. Note that the parameters are for the
// predictor, and may not match the actual image parameters.
- StreamPredictor(Stream *str, int predictor,
- int width, int nComps, int nBits);
+ StreamPredictor(Stream *strA, int predictorA,
+ int widthA, int nCompsA, int nBitsA);
~StreamPredictor();
// FileStream
//------------------------------------------------------------------------
-class FileStream: public Stream {
+#define fileStreamBufSize 256
+
+class FileStream: public BaseStream {
public:
- FileStream(FILE *f1, int start1, int length1, Object *dict1);
+ FileStream(FILE *fA, Guint startA, GBool limitedA,
+ Guint lengthA, Object *dictA);
virtual ~FileStream();
+ virtual Stream *makeSubStream(Guint startA, GBool limitedA,
+ Guint lengthA, Object *dictA);
virtual StreamKind getKind() { return strFile; }
virtual void reset();
+ virtual void close();
virtual int getChar()
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
virtual int lookChar()
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
virtual int getPos() { return bufPos + (bufPtr - buf); }
- virtual void setPos(int pos1);
- virtual GBool isBinary(GBool last = gTrue) { return last; }
- virtual Stream *getBaseStream() { return this; }
- virtual FILE *getFile() { return f; }
- virtual Dict *getDict() { return dict.getDict(); }
-
- // Check for a PDF header on this stream. Skip past some garbage
- // if necessary.
- GBool checkHeader();
-
- // Get position of first byte of stream within the file.
- int getStart() { return start; }
+ virtual void setPos(Guint pos, int dir = 0);
+ virtual void ignoreLength() { limited = gFalse; }
+ virtual Guint getStart() { return start; }
+ virtual void moveStart(int delta);
private:
GBool fillBuf();
FILE *f;
- int start;
- int length;
- char buf[256];
+ Guint start;
+ GBool limited;
+ Guint length;
+ char buf[fileStreamBufSize];
char *bufPtr;
char *bufEnd;
- int bufPos;
+ Guint bufPos;
int savePos;
- Object dict;
+ GBool saved;
+};
+
+//------------------------------------------------------------------------
+// MemStream
+//------------------------------------------------------------------------
+
+class MemStream: public BaseStream {
+public:
+
+ MemStream(char *bufA, Guint startA, Guint lengthA, Object *dictA);
+ virtual ~MemStream();
+ virtual Stream *makeSubStream(Guint start, GBool limited,
+ Guint lengthA, Object *dictA);
+ virtual StreamKind getKind() { return strWeird; }
+ virtual void reset();
+ virtual void close();
+ virtual int getChar()
+ { return (bufPtr < bufEnd) ? (*bufPtr++ & 0xff) : EOF; }
+ virtual int lookChar()
+ { return (bufPtr < bufEnd) ? (*bufPtr & 0xff) : EOF; }
+ virtual int getPos() { return (int)(bufPtr - buf); }
+ virtual void setPos(Guint pos, int dir = 0);
+ virtual Guint getStart() { return start; }
+ virtual void moveStart(int delta);
+#ifndef NO_DECRYPTION
+ virtual void doDecryption(Guchar *fileKey, int keyLength,
+ int objNum, int objGen);
+#endif
+
+private:
+
+ char *buf;
+ Guint start;
+ Guint length;
+ char *bufEnd;
+ char *bufPtr;
+ GBool needFree;
};
//------------------------------------------------------------------------
-// SubStream
+// EmbedStream
+//
+// This is a special stream type used for embedded streams (inline
+// images). It reads directly from the base stream -- after the
+// EmbedStream is deleted, reads from the base stream will proceed where
+// the BaseStream left off. Note that this is very different behavior
+// that creating a new FileStream (using makeSubStream).
//------------------------------------------------------------------------
-class SubStream: public Stream {
+class EmbedStream: public BaseStream {
public:
- SubStream(Stream *str1, Object *dict1);
- virtual ~SubStream();
+ EmbedStream(Stream *strA, Object *dictA, GBool limitedA, Guint lengthA);
+ virtual ~EmbedStream();
+ virtual Stream *makeSubStream(Guint start, GBool limitedA,
+ Guint lengthA, Object *dictA);
virtual StreamKind getKind() { return str->getKind(); }
virtual void reset() {}
- virtual int getChar() { return str->getChar(); }
- virtual int lookChar() { return str->lookChar(); }
+ virtual int getChar();
+ virtual int lookChar();
virtual int getPos() { return str->getPos(); }
- virtual GBool isBinary(GBool last = gTrue) { return last; }
- virtual Stream *getBaseStream() { return this; }
- virtual FILE *getFile() { return str->getFile(); }
- virtual Dict *getDict() { return dict.getDict(); }
+ virtual void setPos(Guint pos, int dir = 0);
+ virtual Guint getStart();
+ virtual void moveStart(int delta);
private:
Stream *str;
- Object dict;
+ GBool limited;
+ Guint length;
};
//------------------------------------------------------------------------
// ASCIIHexStream
//------------------------------------------------------------------------
-class ASCIIHexStream: public Stream {
+class ASCIIHexStream: public FilterStream {
public:
- ASCIIHexStream(Stream *str1);
+ ASCIIHexStream(Stream *strA);
virtual ~ASCIIHexStream();
virtual StreamKind getKind() { return strASCIIHex; }
virtual void reset();
virtual int getChar()
{ int c = lookChar(); buf = EOF; return c; }
virtual int lookChar();
- virtual int getPos() { return str->getPos(); }
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
- virtual Stream *getBaseStream() { return str->getBaseStream(); }
- virtual FILE *getFile() { return str->getFile(); }
- virtual Dict *getDict() { return str->getDict(); }
private:
- Stream *str;
int buf;
GBool eof;
};
// ASCII85Stream
//------------------------------------------------------------------------
-class ASCII85Stream: public Stream {
+class ASCII85Stream: public FilterStream {
public:
- ASCII85Stream(Stream *str1);
+ ASCII85Stream(Stream *strA);
virtual ~ASCII85Stream();
virtual StreamKind getKind() { return strASCII85; }
virtual void reset();
virtual int getChar()
{ int ch = lookChar(); ++index; return ch; }
virtual int lookChar();
- virtual int getPos() { return str->getPos(); }
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
- virtual Stream *getBaseStream() { return str->getBaseStream(); }
- virtual FILE *getFile() { return str->getFile(); }
- virtual Dict *getDict() { return str->getDict(); }
private:
- Stream *str;
int c[5];
int b[4];
int index, n;
// LZWStream
//------------------------------------------------------------------------
-class LZWStream: public Stream {
+class LZWStream: public FilterStream {
public:
- LZWStream(Stream *str1, int predictor1, int columns1, int colors1,
- int bits1, int early1);
+ LZWStream(Stream *strA, int predictor, int columns, int colors,
+ int bits, int earlyA);
virtual ~LZWStream();
virtual StreamKind getKind() { return strLZW; }
virtual void reset();
virtual int getChar();
virtual int lookChar();
virtual int getRawChar();
- virtual int getPos() { return str->getPos(); }
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
- virtual Stream *getBaseStream() { return str->getBaseStream(); }
- virtual FILE *getFile() { return str->getFile(); }
- virtual Dict *getDict() { return str->getDict(); }
private:
- Stream *str; // stream
StreamPredictor *pred; // predictor
int early; // early parameter
- char zCmd[256]; // uncompress command
- FILE *zPipe; // uncompress pipe
- char *zName; // .Z file name (in zCmd)
+ GBool eof; // true if at eof
int inputBuf; // input buffer
int inputBits; // number of bits in input buffer
- int inCodeBits; // size of input code
- char buf[256]; // buffer
- char *bufPtr; // next char to read
- char *bufEnd; // end of buffer
-
- void dumpFile(FILE *f);
+ struct { // decoding table
+ int length;
+ int head;
+ Guchar tail;
+ } table[4097];
+ int nextCode; // next code to be used
+ int nextBits; // number of bits in next code word
+ int prevCode; // previous code used in stream
+ int newChar; // next char to be added to table
+ Guchar seqBuf[4097]; // buffer for current sequence
+ int seqLength; // length of current sequence
+ int seqIndex; // index into current sequence
+ GBool first; // first code after a table clear
+
+ GBool processNextCode();
+ void clearTable();
int getCode();
- GBool fillBuf();
};
//------------------------------------------------------------------------
// RunLengthStream
//------------------------------------------------------------------------
-class RunLengthStream: public Stream {
+class RunLengthStream: public FilterStream {
public:
- RunLengthStream(Stream *str1);
+ RunLengthStream(Stream *strA);
virtual ~RunLengthStream();
virtual StreamKind getKind() { return strRunLength; }
virtual void reset();
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
virtual int lookChar()
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
- virtual int getPos() { return str->getPos(); }
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
- virtual Stream *getBaseStream() { return str->getBaseStream(); }
- virtual FILE *getFile() { return str->getFile(); }
- virtual Dict *getDict() { return str->getDict(); }
private:
- Stream *str;
char buf[128]; // buffer
char *bufPtr; // next char to read
char *bufEnd; // end of buffer
struct CCITTCodeTable;
-class CCITTFaxStream: public Stream {
+class CCITTFaxStream: public FilterStream {
public:
- CCITTFaxStream(Stream *str, int encoding, GBool endOfLine,
- GBool byteAlign, int columns, int rows,
- GBool endOfBlock, GBool black);
+ CCITTFaxStream(Stream *strA, int encodingA, GBool endOfLineA,
+ GBool byteAlignA, int columnsA, int rowsA,
+ GBool endOfBlockA, GBool blackA);
virtual ~CCITTFaxStream();
virtual StreamKind getKind() { return strCCITTFax; }
virtual void reset();
virtual int getChar()
{ int c = lookChar(); buf = EOF; return c; }
virtual int lookChar();
- virtual int getPos() { return str->getPos(); }
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
- virtual Stream *getBaseStream() { return str->getBaseStream(); }
- virtual FILE *getFile() { return str->getFile(); }
- virtual Dict *getDict() { return str->getDict(); }
private:
- Stream *str; // stream
int encoding; // 'K' parameter
GBool endOfLine; // 'EndOfLine' parameter
GBool byteAlign; // 'EncodedByteAlign' parameter
// DCT component info
struct DCTCompInfo {
int id; // component ID
- GBool inScan; // is this component in the current scan?
int hSample, vSample; // horiz/vert sampling resolutions
int quantTable; // quantization table number
- int dcHuffTable, acHuffTable; // Huffman table numbers
int prevDC; // DC coefficient accumulator
};
+struct DCTScanInfo {
+ GBool comp[4]; // comp[i] is set if component i is
+ // included in this scan
+ int numComps; // number of components in the scan
+ int dcHuffTable[4]; // DC Huffman table numbers
+ int acHuffTable[4]; // AC Huffman table numbers
+ int firstCoeff, lastCoeff; // first and last DCT coefficient
+ int ah, al; // successive approximation parameters
+};
+
// DCT Huffman decoding table
struct DCTHuffTable {
Guchar firstSym[17]; // first symbol for this bit length
Guchar sym[256]; // symbols
};
-class DCTStream: public Stream {
+class DCTStream: public FilterStream {
public:
- DCTStream(Stream *str1);
+ DCTStream(Stream *strA);
virtual ~DCTStream();
virtual StreamKind getKind() { return strDCT; }
virtual void reset();
virtual int getChar();
virtual int lookChar();
- virtual int getPos() { return str->getPos(); }
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
- virtual Stream *getBaseStream() { return str->getBaseStream(); }
- virtual FILE *getFile() { return str->getFile(); }
- virtual Dict *getDict() { return str->getDict(); }
Stream *getRawStream() { return str; }
private:
- Stream *str; // stream
+ GBool progressive; // set if in progressive mode
+ GBool interleaved; // set if in interleaved mode
int width, height; // image size
int mcuWidth, mcuHeight; // size of min coding unit, in data units
+ int bufWidth, bufHeight; // frameBuf size
DCTCompInfo compInfo[4]; // info for each component
+ DCTScanInfo scanInfo; // info for the current scan
int numComps; // number of components in image
int colorXform; // need YCbCr-to-RGB transform?
+ GBool gotJFIFMarker; // set if APP0 JFIF marker was present
GBool gotAdobeMarker; // set if APP14 Adobe marker was present
int restartInterval; // restart interval, in MCUs
Guchar quantTables[4][64]; // quantization tables
DCTHuffTable acHuffTables[4]; // AC Huffman tables
int numDCHuffTables; // number of DC Huffman tables
int numACHuffTables; // number of AC Huffman tables
- Guchar *rowBuf[4][32]; // buffer for one MCU
+ Guchar *rowBuf[4][32]; // buffer for one MCU (non-progressive mode)
+ int *frameBuf[4]; // buffer for frame (progressive mode)
int comp, x, y, dy; // current position within image/MCU
int restartCtr; // MCUs left until restart
int restartMarker; // next restart marker
+ int eobRun; // number of EOBs left in the current run
int inputBuf; // input buffer for variable length codes
int inputBits; // number of valid bits in input buffer
void restart();
GBool readMCURow();
- GBool readDataUnit(DCTHuffTable *dcHuffTable, DCTHuffTable *acHuffTable,
- Guchar quantTable[64], int *prevDC, Guchar data[64]);
+ void readScan();
+ GBool readDataUnit(DCTHuffTable *dcHuffTable,
+ DCTHuffTable *acHuffTable,
+ int *prevDC, int data[64]);
+ GBool readProgressiveDataUnit(DCTHuffTable *dcHuffTable,
+ DCTHuffTable *acHuffTable,
+ int *prevDC, int data[64]);
+ void decodeImage();
+ void transformDataUnit(Guchar *quantTable,
+ int dataIn[64], Guchar dataOut[64]);
int readHuffSym(DCTHuffTable *table);
int readAmp(int size);
int readBit();
GBool readHeader();
- GBool readFrameInfo();
+ GBool readBaselineSOF();
+ GBool readProgressiveSOF();
GBool readScanInfo();
GBool readQuantTables();
GBool readHuffmanTables();
GBool readRestartInterval();
+ GBool readJFIFMarker();
GBool readAdobeMarker();
GBool readTrailer();
int readMarker();
// Huffman code table entry
struct FlateCode {
- int len; // code length in bits
- int code; // code word
- int val; // value represented by this code
+ Gushort len; // code length, in bits
+ Gushort val; // value represented by this code
};
-// Huffman code table
struct FlateHuffmanTab {
- int start[flateMaxHuffman+2]; // indexes of first code of each length
- FlateCode *codes; // codes, sorted by length and code word
+ FlateCode *codes;
+ int maxLen;
};
// Decoding info for length and distance code words
int first; // first length/distance
};
-class FlateStream: public Stream {
+class FlateStream: public FilterStream {
public:
- FlateStream(Stream *str1, int predictor1, int columns1,
- int colors1, int bits1);
+ FlateStream(Stream *strA, int predictor, int columns,
+ int colors, int bits);
virtual ~FlateStream();
virtual StreamKind getKind() { return strFlate; }
virtual void reset();
virtual int getChar();
virtual int lookChar();
virtual int getRawChar();
- virtual int getPos() { return str->getPos(); }
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
- virtual Stream *getBaseStream() { return str->getBaseStream(); }
- virtual FILE *getFile() { return str->getFile(); }
- virtual Dict *getDict() { return str->getDict(); }
private:
- Stream *str; // stream
StreamPredictor *pred; // predictor
Guchar buf[flateWindow]; // output data buffer
int index; // current index into output buffer
int remain; // number valid bytes in output buffer
int codeBuf; // input buffer
int codeSize; // number of bits in input buffer
- FlateCode // literal and distance codes
- allCodes[flateMaxLitCodes + flateMaxDistCodes];
+ int // literal and distance code lengths
+ codeLengths[flateMaxLitCodes + flateMaxDistCodes];
FlateHuffmanTab litCodeTab; // literal code table
FlateHuffmanTab distCodeTab; // distance code table
GBool compressedBlock; // set if reading a compressed block
GBool startBlock();
void loadFixedCodes();
GBool readDynamicCodes();
- void compHuffmanCodes(FlateHuffmanTab *tab, int n);
+ void compHuffmanCodes(int *lengths, int n, FlateHuffmanTab *tab);
int getHuffmanCodeWord(FlateHuffmanTab *tab);
int getCodeWord(int bits);
};
// EOFStream
//------------------------------------------------------------------------
-class EOFStream: public Stream {
+class EOFStream: public FilterStream {
public:
- EOFStream(Stream *str1);
+ EOFStream(Stream *strA);
virtual ~EOFStream();
virtual StreamKind getKind() { return strWeird; }
virtual void reset() {}
virtual int getChar() { return EOF; }
virtual int lookChar() { return EOF; }
- virtual int getPos() { return str->getPos(); }
- virtual GString *getPSFilter(char *indent) { return NULL; }
+ virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
- virtual Stream *getBaseStream() { return str->getBaseStream(); }
- virtual FILE *getFile() { return str->getFile(); }
- virtual Dict *getDict() { return str->getDict(); }
-
-private:
-
- Stream *str;
};
//------------------------------------------------------------------------
// FixedLengthEncoder
//------------------------------------------------------------------------
-class FixedLengthEncoder: public Stream {
+class FixedLengthEncoder: public FilterStream {
public:
- FixedLengthEncoder(Stream *str1, int length1);
+ FixedLengthEncoder(Stream *strA, int lengthA);
~FixedLengthEncoder();
virtual StreamKind getKind() { return strWeird; }
virtual void reset();
virtual int getChar();
virtual int lookChar();
- virtual int getPos() { return str->getPos(); }
- virtual GString *getPSFilter(char *indent) { return NULL; }
- virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
- virtual Stream *getBaseStream() { return str->getBaseStream(); }
- virtual FILE *getFile() { return str->getFile(); }
- virtual Dict *getDict() { return str->getDict(); }
+ virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
+ virtual GBool isBinary(GBool last = gTrue);
virtual GBool isEncoder() { return gTrue; }
private:
- Stream *str;
int length;
int count;
};
+//------------------------------------------------------------------------
+// ASCIIHexEncoder
+//------------------------------------------------------------------------
+
+class ASCIIHexEncoder: public FilterStream {
+public:
+
+ ASCIIHexEncoder(Stream *strA);
+ virtual ~ASCIIHexEncoder();
+ virtual StreamKind getKind() { return strWeird; }
+ virtual void reset();
+ virtual int getChar()
+ { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
+ virtual int lookChar()
+ { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
+ virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
+ virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
+ virtual GBool isEncoder() { return gTrue; }
+
+private:
+
+ char buf[4];
+ char *bufPtr;
+ char *bufEnd;
+ int lineLen;
+ GBool eof;
+
+ GBool fillBuf();
+};
+
//------------------------------------------------------------------------
// ASCII85Encoder
//------------------------------------------------------------------------
-class ASCII85Encoder: public Stream {
+class ASCII85Encoder: public FilterStream {
public:
- ASCII85Encoder(Stream *str1);
+ ASCII85Encoder(Stream *strA);
virtual ~ASCII85Encoder();
virtual StreamKind getKind() { return strWeird; }
virtual void reset();
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
virtual int lookChar()
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
- virtual int getPos() { return str->getPos(); }
- virtual GString *getPSFilter(char *indent) { return NULL; }
+ virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
- virtual Stream *getBaseStream() { return str->getBaseStream(); }
- virtual FILE *getFile() { return str->getFile(); }
- virtual Dict *getDict() { return str->getDict(); }
virtual GBool isEncoder() { return gTrue; }
private:
- Stream *str;
char buf[8];
char *bufPtr;
char *bufEnd;
// RunLengthEncoder
//------------------------------------------------------------------------
-class RunLengthEncoder: public Stream {
+class RunLengthEncoder: public FilterStream {
public:
- RunLengthEncoder(Stream *str1);
+ RunLengthEncoder(Stream *strA);
virtual ~RunLengthEncoder();
virtual StreamKind getKind() { return strWeird; }
virtual void reset();
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
virtual int lookChar()
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
- virtual int getPos() { return str->getPos(); }
- virtual GString *getPSFilter(char *indent) { return NULL; }
- virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
- virtual Stream *getBaseStream() { return str->getBaseStream(); }
- virtual FILE *getFile() { return str->getFile(); }
- virtual Dict *getDict() { return str->getDict(); }
+ virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
+ virtual GBool isBinary(GBool last = gTrue) { return gTrue; }
virtual GBool isEncoder() { return gTrue; }
private:
- Stream *str;
char buf[131];
char *bufPtr;
char *bufEnd;
https://www.fi.muni.cz/~kas/git / evince.git / blobdiff