591 lines
20 KiB
C
591 lines
20 KiB
C
/*****************************************************************************
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* "Gif-Lib" - Yet another gif library. *
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* *
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* Written by: Gershon Elber Ver 0.1, Jul. 1989 *
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******************************************************************************
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* Program to dump GIF file into EPSON type printers *
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* Options: *
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* -q : quite printing mode. *
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* -d factor : use dithering of matrix of size factor by factor. *
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* -t level : set the threshold level of white in the result (0..100). *
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* -m mapping : methods for mapping the 24bits colors into 1 BW bit. *
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* -p printer : specify printer to print to (lpt1: by default). *
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* -n : nice mode : uses double density to achieve better quality. *
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* -i : invert the image. *
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* -h : on line help. *
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******************************************************************************
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* History: *
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* 15 Jul 89 - Version 1.0 by Gershon Elber. *
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* 22 Dec 89 - Fix problems with const strings been modified (Version 1.1). *
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*****************************************************************************/
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#ifdef __MSDOS__
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#include <graphics.h>
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#include <stdlib.h>
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#include <alloc.h>
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#include <io.h>
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#include <dos.h>
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#include <bios.h>
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#endif /* __MSDOS__ */
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <fcntl.h>
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#include "gif_lib.h"
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#include "getarg.h"
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#define PROGRAM_NAME "Gif2Epsn"
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#define C2BW_BACK_GROUND 0 /*Methods to map 24bits Colors to 1 BW bit.*/
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#define C2BW_GREY_LEVELS 1
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#define C2BW_DITHER 2
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#define C2BW_NUM_METHODS 3 /* Always hold # of methods. */
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#define DEFAULT_THRESHOLD 5000 /* Color -> BW threshold level. */
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#define DITHER_MIN_MATRIX 2
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#define DITHER_MAX_MATRIX 4
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/* The epson specific are defined here: */
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#define EPSON_WIDTH 80 /* 80 char per line. */
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#define EPSON_PIXEL_2_CHAR 8 /* 8 pixels per char, in REG_DENSITY. */
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#define EPSON_ESC "\033" /* Actually regular escape char. */
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#define EPSON_RESET "\033@" /* Reset the printer. */
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#define EPSON_VERTICAL_SPACE "\033A\010" /* 8/72 inch vertically. */
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#define EPSON_REG_DENSITY "\033K" /* 640 pixels per 7.5" (line). */
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#define EPSON_DUAL_DENSITY "\033L" /* 1280 pixels per 7.5" (line). */
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#ifdef __MSDOS__
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extern unsigned int
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_stklen = 16384; /* Increase default stack size. */
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#endif /* __MSDOS__ */
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#ifdef SYSV
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static char *VersionStr =
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"Gif library module,\t\tGershon Elber\n\
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(C) Copyright 1989 Gershon Elber, Non commercial use only.\n";
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static char
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*CtrlStr = "Gif2Epsn q%- d%-DitherSize!d t%-BWThreshold!d m%-Mapping!d i%- n%- p%-PrinterName!s h%- GifFile!*s";
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#else
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static char
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*VersionStr =
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PROGRAM_NAME
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GIF_LIB_VERSION
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" Gershon Elber, "
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__DATE__ ", " __TIME__ "\n"
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"(C) Copyright 1989 Gershon Elber, Non commercial use only.\n";
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static char
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*CtrlStr =
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PROGRAM_NAME
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" q%- d%-DitherSize!d t%-BWThreshold!d m%-Mapping!d i%- n%- p%-PrinterName!s h%- GifFile!*s";
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#endif /* SYSV */
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static char
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*PrinterName = NULL;
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/* Make some variables global, so we could access them faster: */
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static int
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ImageNum = 0,
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BackGround = 0,
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DitherSize = 2, DitherFlag = FALSE,
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BWThresholdFlag = FALSE, Threshold,
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BWThreshold = DEFAULT_THRESHOLD, /* Color -> BW mapping threshold. */
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Mapping, MappingFlag = FALSE,
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InvertFlag = FALSE,
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NiceFlag = FALSE,
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PrinterFlag = FALSE,
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HelpFlag = FALSE,
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ColorToBWMapping = C2BW_BACK_GROUND,
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InterlacedOffset[] = { 0, 4, 2, 1 }, /* The way Interlaced image should */
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InterlacedJumps[] = { 8, 8, 4, 2 }; /* be read - offsets and jumps... */
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static GifColorType
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*ColorMap;
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static void EvalDitheredScanline(GifRowType *ScreenBuffer, int Row,
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int RowSize, GifRowType *DitherBuffer);
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static void DumpScreen2Epsn(GifRowType *ScreenBuffer,
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int ScreenWidth, int ScreenHeight);
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static void PutString(FILE *Prt, int DirectPrint, char *Str, int Len);
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static void PutString2(FILE *Prt, int DirectPrint, char *Str, int Len);
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/******************************************************************************
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* Interpret the command line and scan the given GIF file. *
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******************************************************************************/
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void main(int argc, char **argv)
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{
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int i, j, Error, NumFiles, Size, Row, Col, Width, Height, ExtCode, Count;
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GifRecordType RecordType;
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GifByteType *Extension;
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char **FileName = NULL;
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GifRowType *ScreenBuffer;
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GifFileType *GifFile;
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if ((Error = GAGetArgs(argc, argv, CtrlStr,
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&GifQuitePrint, &DitherFlag, &DitherSize,
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&BWThresholdFlag, &Threshold,
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&MappingFlag, &Mapping, &InvertFlag,
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&NiceFlag, &PrinterFlag, &PrinterName, &HelpFlag,
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&NumFiles, &FileName)) != FALSE ||
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(NumFiles > 1 && !HelpFlag)) {
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if (Error)
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GAPrintErrMsg(Error);
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else if (NumFiles > 1)
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GIF_MESSAGE("Error in command line parsing - one GIF file please.");
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GAPrintHowTo(CtrlStr);
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exit(1);
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}
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if (HelpFlag) {
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fprintf(stderr, VersionStr);
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GAPrintHowTo(CtrlStr);
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exit(0);
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}
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if (!PrinterFlag) PrinterName = "";
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if (DitherFlag) {
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/* Make sure we are o.k.: */
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if (DitherSize > DITHER_MAX_MATRIX) DitherSize = DITHER_MAX_MATRIX;
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if (DitherSize < DITHER_MIN_MATRIX) DitherSize = DITHER_MAX_MATRIX;
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}
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/* As Threshold is in [0..100] range and BWThreshold is [0..25500]: */
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if (BWThresholdFlag) {
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if (Threshold > 100 || Threshold < 0)
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GIF_EXIT("Threshold not in 0..100 percent.");
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BWThreshold = Threshold * 255;
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if (BWThreshold == 0) BWThreshold = 1; /* Overcome divide by zero! */
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}
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/* No message is emitted, but mapping method is clipped to exists method.*/
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if (MappingFlag) ColorToBWMapping = Mapping % C2BW_NUM_METHODS;
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if (NumFiles == 1) {
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if ((GifFile = DGifOpenFileName(*FileName)) == NULL) {
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PrintGifError();
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exit(-1);
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}
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}
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else {
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/* Use the stdin instead: */
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#ifdef __MSDOS__
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setmode(0, O_BINARY);
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#endif /* __MSDOS__ */
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if ((GifFile = DGifOpenFileHandle(0)) == NULL) {
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PrintGifError();
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exit(-1);
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}
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}
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/* Allocate the screen as vector of column of rows. We cannt allocate */
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/* the all screen at once, as this broken minded CPU can allocate up to */
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/* 64k at a time and our image can be bigger than that: */
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/* Note this screen is device independent - its the screen as defined by */
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/* the GIF file parameters itself. */
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if ((ScreenBuffer = (GifRowType *)
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malloc(GifFile -> SHeight * sizeof(GifRowType *))) == NULL)
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GIF_EXIT("Failed to allocate memory required, aborted.");
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Size = GifFile -> SWidth * sizeof(GifPixelType);/* Size in bytes one row.*/
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if ((ScreenBuffer[0] = (GifRowType) malloc(Size)) == NULL) /* First row. */
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GIF_EXIT("Failed to allocate memory required, aborted.");
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for (i = 0; i < GifFile -> SWidth; i++) /* Set its color to BackGround. */
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ScreenBuffer[0][i] = GifFile -> SBackGroundColor;
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for (i = 1; i < GifFile -> SHeight; i++) {
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/* Allocate the other rows, andset their color to background too: */
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if ((ScreenBuffer[i] = (GifRowType) malloc(Size)) == NULL)
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GIF_EXIT("Failed to allocate memory required, aborted.\n");
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memcpy(ScreenBuffer[i], ScreenBuffer[0], Size);
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}
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/* Scan the content of the GIF file and load the image(s) in: */
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do {
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if (DGifGetRecordType(GifFile, &RecordType) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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switch (RecordType) {
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case IMAGE_DESC_RECORD_TYPE:
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if (DGifGetImageDesc(GifFile) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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Row = GifFile -> ITop; /* Image Position relative to Screen. */
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Col = GifFile -> ILeft;
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Width = GifFile -> IWidth;
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Height = GifFile -> IHeight;
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GifQprintf("\n%s: Image %d at (%d, %d) [%dx%d]: ",
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PROGRAM_NAME, ++ImageNum, Col, Row, Width, Height);
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if (GifFile -> ILeft + GifFile -> IWidth > GifFile -> SWidth ||
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GifFile -> ITop + GifFile -> IHeight > GifFile -> SHeight) {
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fprintf(stderr, "Image %d is not confined to screen dimension, aborted.\n");
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exit(-2);
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}
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if (GifFile -> IInterlace) {
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/* Need to perform 4 passes on the images: */
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for (Count = i = 0; i < 4; i++)
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for (j = Row + InterlacedOffset[i]; j < Row + Height;
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j += InterlacedJumps[i]) {
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GifQprintf("\b\b\b\b%-4d", Count++);
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if (DGifGetLine(GifFile, &ScreenBuffer[j][Col],
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Width) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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}
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}
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else {
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for (i = 0; i < Height; i++) {
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GifQprintf("\b\b\b\b%-4d", i);
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if (DGifGetLine(GifFile, &ScreenBuffer[Row++][Col],
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Width) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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}
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}
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break;
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case EXTENSION_RECORD_TYPE:
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/* Skip any extension blocks in file: */
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if (DGifGetExtension(GifFile, &ExtCode, &Extension) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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while (Extension != NULL) {
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if (DGifGetExtensionNext(GifFile, &Extension) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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}
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break;
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case TERMINATE_RECORD_TYPE:
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break;
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default: /* Should be traps by DGifGetRecordType. */
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break;
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}
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}
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while (RecordType != TERMINATE_RECORD_TYPE);
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/* Lets display it - set the global variables required and do it: */
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BackGround = GifFile -> SBackGroundColor;
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ColorMap = (GifFile -> IColorMap ? GifFile -> IColorMap :
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GifFile -> SColorMap);
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DumpScreen2Epsn(ScreenBuffer, GifFile -> SWidth, GifFile -> SHeight);
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if (DGifCloseFile(GifFile) == GIF_ERROR) {
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PrintGifError();
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exit(-1);
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}
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}
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/*****************************************************************************
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* Routine to evaluate dithered scanlines out of given ones, using Size *
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* dithering matrix, starting from Row. The given scanlines are NOT modified. *
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*****************************************************************************/
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static void EvalDitheredScanline(GifRowType *ScreenBuffer, int Row,
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int RowSize, GifRowType *DitherBuffer)
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{
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static char Dither2[2][2] = { /* See Foley & Van Dam pp. 597-601. */
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{ 1, 3 },
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{ 4, 2 }
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};
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static char Dither3[3][3] = {
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{ 7, 9, 5 },
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{ 2, 1, 4 },
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{ 6, 3, 8 }
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};
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static char Dither4[4][4] = {
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{ 1, 9, 3, 11 },
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{ 13, 5, 15, 7 },
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{ 4, 12, 2, 10 },
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{ 16, 8, 14, 6 }
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};
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int i, j, k, Level;
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long Intensity;
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GifColorType *ColorMapEntry;
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/* Scan the Rows (Size rows) evaluate intensity every Size pixel and use */
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/* the dither matrix to set the dithered result; */
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for (i = 0; i <= RowSize - DitherSize; i += DitherSize) {
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Intensity = 0;
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for (j = Row; j < Row + DitherSize; j++)
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for (k = 0; k < DitherSize; k++) {
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ColorMapEntry = &ColorMap[ScreenBuffer[j][i+k]];
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Intensity += 30 * ((int) ColorMapEntry->Red) +
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59 * ((int) ColorMapEntry->Green) +
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11 * ((int) ColorMapEntry->Blue);
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}
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/* Find the intensity level (between 0 and Size^2) of our matrix: */
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/* Expression is "Intensity * BWThreshold / (25500 * DefThresh)" */
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/* but to prevent from overflow in the long evaluation we do this: */
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Level = ((Intensity / 2550) * ((long) DEFAULT_THRESHOLD) /
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(((long) BWThreshold) * 10));
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switch (DitherSize) {
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case 2:
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for (j = 0; j < DitherSize; j++)
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for (k = 0; k < DitherSize; k++)
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DitherBuffer[j][i+k] = Dither2[j][k] <= Level;
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break;
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case 3:
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for (j = 0; j < DitherSize; j++)
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for (k = 0; k < DitherSize; k++)
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DitherBuffer[j][i+k] = Dither3[j][k] <= Level;
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break;
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case 4:
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for (j = 0; j < DitherSize; j++)
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for (k = 0; k < DitherSize; k++)
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DitherBuffer[j][i+k] = Dither4[j][k] <= Level;
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break;
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}
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}
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}
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/******************************************************************************
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* The real dumping routine. Few things are taken into account: *
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* 1. The Nice flag. If TRUE each pixel is printed twice in double density. *
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* 2. The Invert flag. If TRUE each pixel before drawn is inverted. *
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* 3. The rendering mode and dither matrix flag if dithering is selected. *
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* The image is drawn from ScreenBuffer ScreenTop/Left in the bottom/right *
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* directions. *
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* Unfortunatelly, there is a BUG in DOS that does not handle ctrl-Z *
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* correctly if we open lptx: device in binary mode (should treat it as any *
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* other char). Therefore I had to write to it directly using biosprint. I *
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* dont like it either, and if you have better way to do it, let me know. *
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******************************************************************************/
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static void DumpScreen2Epsn(GifRowType *ScreenBuffer,
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int ScreenWidth, int ScreenHeight)
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{
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int i, j, p, Size, LeftCWidth, Len, DirectPrint = 0,
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DitheredLinesLeft = 0, DitheredLinesCount = 0, MapInvert[2];
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char LinePrefixLen[2]; /* Length of scan line. */
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GifByteType *EpsonBuffer;
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GifPixelType *Line;
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GifRowType *DitherBuffer;
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GifColorType *ColorMapEntry;
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FILE *Prt = NULL;
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#ifdef __MSDOS__
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for (i = 0; i < strlen(PrinterName); i++)
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if (islower(PrinterName[i]))
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PrinterName[i] = toupper(PrinterName[i]);
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if (strcmp(PrinterName, "LPT1") == 0 ||
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strcmp(PrinterName, "PRN") == 0)
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DirectPrint = 1;
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else if (strcmp(PrinterName, "LPT2") == 0)
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DirectPrint = 2;
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else if (strcmp(PrinterName, "LPT3") == 0)
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DirectPrint = 3;
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#endif /* __MSDOS__ */
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if (!DirectPrint) {
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#ifdef __MSDOS__
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if (strlen(PrinterName) == 0) {
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setmode(1, O_BINARY); /* Make sure it is in binary mode. */
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Prt = stdout;
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}
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else if ((Prt = fopen(PrinterName, "wb")) == NULL ||
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setvbuf(Prt, NULL, _IOFBF, GIF_FILE_BUFFER_SIZE))
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#else
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if (strlen(PrinterName) == 0)
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Prt = stdout;
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else if ((Prt = fopen(PrinterName, "w")) == NULL)
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#endif /* __MSDOS__ */
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GIF_EXIT("Failed to open output (printer) file.");
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}
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if ((EpsonBuffer = (GifByteType *) malloc(ScreenWidth)) == NULL)
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GIF_EXIT("Failed to allocate memory required, aborted.");
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/* Allocate the buffer to save the dithered information. */
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if (ColorToBWMapping == C2BW_DITHER) {
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if ((DitherBuffer = (GifRowType *)
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malloc(DITHER_MAX_MATRIX * sizeof(GifRowType *))) != NULL) {
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Size = ScreenWidth * sizeof(GifPixelType); /* Size of one row. */
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for (i = 0; i < DITHER_MAX_MATRIX; i++) {
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if ((DitherBuffer[i] = (GifRowType) malloc(Size)) == NULL) {
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DitherBuffer = NULL;
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break;
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}
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}
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}
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if (DitherBuffer == NULL)
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GIF_EXIT("Failed to allocate memory required, aborted.");
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}
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else
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DitherBuffer = NULL;
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/* Reset the printer, and make sure no space between adjacent lines: */
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PutString(Prt, DirectPrint, EPSON_RESET, 2);
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PutString(Prt, DirectPrint, EPSON_VERTICAL_SPACE, 3);
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/* Prepar left spacing to begin with, so image will be in the middle. */
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LeftCWidth = (EPSON_WIDTH - (ScreenWidth / EPSON_PIXEL_2_CHAR)) / 2;
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if (InvertFlag) { /* Make the inversion as fast a possible. */
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MapInvert[0] = 1;
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MapInvert[1] = 0;
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}
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else {
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MapInvert[0] = 0;
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MapInvert[1] = 1;
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}
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for (i = 0, p = 0; i < ScreenHeight; i++, p++) {
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GifQprintf("\b\b\b\b%-4d", ScreenHeight - i);
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Line = ScreenBuffer[i];
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/* If 8 lines were accumulated in printer buffer - dump them out. */
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if (p == 8) {
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for (Len = ScreenWidth-1; Len >= 0; Len--)
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if (EpsonBuffer[Len]) break;
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/* Only in case this line is not empty: */
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if (Len++ >= 0) {
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/* Make the left space, so image will be centered: */
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for (j = 0; j < LeftCWidth; j++)
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PutString(Prt, DirectPrint, " ", 1);
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/* Full printer line is ready to be dumped - send it out: */
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if (NiceFlag) {
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PutString(Prt, DirectPrint, EPSON_DUAL_DENSITY, 2);
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LinePrefixLen[0] = (Len * 2) % 256;
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LinePrefixLen[1] = (Len * 2) / 256;
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PutString(Prt, DirectPrint, LinePrefixLen, 2);
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PutString2(Prt, DirectPrint, (char *) EpsonBuffer, Len);
|
|
}
|
|
else {
|
|
PutString(Prt, DirectPrint, EPSON_REG_DENSITY, 2);
|
|
LinePrefixLen[0] = Len % 256;
|
|
LinePrefixLen[1] = Len / 256;
|
|
PutString(Prt, DirectPrint, LinePrefixLen, 2);
|
|
PutString(Prt, DirectPrint, (char *) EpsonBuffer, Len);
|
|
}
|
|
}
|
|
PutString(Prt, DirectPrint, "\015\012", 2);
|
|
p = 0;
|
|
}
|
|
|
|
/* We decide right here what method to map Colors to BW so the inner */
|
|
/* loop will be independent of it (and therefore faster): */
|
|
switch(ColorToBWMapping) {
|
|
case C2BW_BACK_GROUND:
|
|
for (j = 0; j < ScreenWidth; j++)
|
|
EpsonBuffer[j] = (EpsonBuffer[j] << 1) +
|
|
MapInvert[Line[j] != BackGround];
|
|
break;
|
|
case C2BW_GREY_LEVELS:
|
|
for (j = 0; j < ScreenWidth; j++) {
|
|
ColorMapEntry = &ColorMap[Line[j]];
|
|
/* For the transformation from RGB to BW, see Folley & */
|
|
/* Van Dam pp 613: The Y channel is the BW we need: */
|
|
/* As colors are 255 maximum, the result can be up to */
|
|
/* 25500 which is still in range of our 16 bits integers */
|
|
EpsonBuffer[j] = (EpsonBuffer[j] << 1) +
|
|
MapInvert[(30 * (int) ColorMapEntry->Red) +
|
|
59 * ((int) ColorMapEntry->Green) +
|
|
11 * ((int) ColorMapEntry->Blue) >
|
|
BWThreshold];
|
|
}
|
|
break;
|
|
case C2BW_DITHER:
|
|
if (DitheredLinesLeft-- == 0) {
|
|
EvalDitheredScanline(ScreenBuffer,
|
|
(i < ScreenHeight - DitherSize ? i :
|
|
ScreenHeight - DitherSize),
|
|
ScreenWidth, DitherBuffer);
|
|
DitheredLinesLeft = DitherSize - 1;
|
|
DitheredLinesCount = 0;
|
|
}
|
|
Line = DitherBuffer[DitheredLinesCount++];
|
|
for (j = 0; j < ScreenWidth; j++)
|
|
EpsonBuffer[j] = (EpsonBuffer[j] << 1) +
|
|
MapInvert[Line[j]];
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If buffer in incomplete - complete it and dump it out: */
|
|
if (p != 0) {
|
|
for (Len = ScreenWidth - 1; Len >= 0; Len--)
|
|
if (EpsonBuffer[Len]) break;
|
|
if (Len++ >= 0) {
|
|
i = 8 - p; /* Amount to shift. */
|
|
for (j = 0; j < ScreenWidth; j++) EpsonBuffer[j] <<= i;
|
|
|
|
/* Make the left space, so image will be centered: */
|
|
for (j = 0; j < LeftCWidth; j++)
|
|
PutString(Prt, DirectPrint, " ", 1);
|
|
|
|
if (NiceFlag) {
|
|
PutString(Prt, DirectPrint, EPSON_DUAL_DENSITY, 2);
|
|
LinePrefixLen[0] = (Len * 2) % 256;
|
|
LinePrefixLen[1] = (Len * 2) / 256;
|
|
PutString(Prt, DirectPrint, LinePrefixLen, 2);
|
|
PutString2(Prt, DirectPrint, (char *) EpsonBuffer, Len);
|
|
}
|
|
else {
|
|
PutString(Prt, DirectPrint, EPSON_REG_DENSITY, 2);
|
|
LinePrefixLen[0] = Len % 256;
|
|
LinePrefixLen[1] = Len / 256;
|
|
PutString(Prt, DirectPrint, LinePrefixLen, 2);
|
|
PutString(Prt, DirectPrint, (char *) EpsonBuffer, Len);
|
|
}
|
|
}
|
|
PutString(Prt, DirectPrint, "\015\012", 2);
|
|
}
|
|
|
|
fclose(Prt);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Dumps the string of given length, to Prt. No char in Str has special *
|
|
* meaning, and even zero (NULL) chars are dumped. *
|
|
* If however DirectPrint is non zero, string is dumped to specifed lpt port. *
|
|
******************************************************************************/
|
|
static void PutString(FILE *Prt, int DirectPrint, char *Str, int Len)
|
|
{
|
|
int i;
|
|
|
|
if (DirectPrint) {
|
|
#ifdef __MSDOS__
|
|
for (i = 0; i < Len; i++) biosprint(0, Str[i], DirectPrint - 1);
|
|
#else
|
|
GIF_EXIT("Can not print directly to a printer if not MSDOS.");
|
|
#endif /* __MSDOS__ */
|
|
}
|
|
else
|
|
for (i = 0; i < Len; i++) fputc(Str[i], Prt);
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Dumps the string of given length, to Prt. No char in Str has special *
|
|
* meaning, and even zero (NULL) chars are dumped. Every char is dumped twice. *
|
|
* If however DirectPrint is non zero, string is dumped to specifed lpt port. *
|
|
******************************************************************************/
|
|
static void PutString2(FILE *Prt, int DirectPrint, char *Str, int Len)
|
|
{
|
|
int i;
|
|
|
|
if (DirectPrint) {
|
|
#ifdef __MSDOS__
|
|
for (i = 0; i < Len; i++) {
|
|
biosprint(0, Str[i], DirectPrint - 1);
|
|
biosprint(0, Str[i], DirectPrint - 1);
|
|
}
|
|
#else
|
|
GIF_EXIT("Can not print directly to a printer if not MSDOS.");
|
|
#endif /* __MSDOS__ */
|
|
}
|
|
else
|
|
for (i = 0; i < Len; i++) {
|
|
fputc(Str[i], Prt);
|
|
fputc(Str[i], Prt);
|
|
}
|
|
}
|