www.pudn.com > giflib12.zip > GIF2PS.C

/***************************************************************************** 
*   "Gif-Lib" - Yet another gif library.				     * 
*									     * 
* Written by:  Gershon Elber				Ver 0.1, Jul. 1989   * 
****************************************************************************** 
* Program to dump GIF file into PostScript type printers		     * 
* Options:								     * 
* -q : quite printing mode.						     * 
* -x : force image to be horizontal.					     * 
* -y : force image to be vertical.					     * 
* -s x y : force image to be of given size.				     * 
* -p x y : force image to be positioned at given position in page.	     * 
* -i : invert the image.						     * 
* -n n : number of copies.						     * 
* -h : on line help.							     * 
****************************************************************************** 
* History:								     * 
* 22 Dec 89 - Version 1.0 by Gershon Elber.				     * 
*****************************************************************************/ 
 
#ifdef __MSDOS__ 
#include  
#include  
#include  
#include  
#include  
#include  
#endif /* __MSDOS__ */ 
 
#include  
#include  
#include  
#include  
#include "gif_lib.h" 
#include "getarg.h" 
 
#define PROGRAM_NAME	"Gif2PS" 
 
#define PAGE_WIDTH      7.5		    /* All dimensions are in inches. */ 
#define PAGE_HEIGHT     9.0 
#define FULL_PAGE_WIDTH 8.5 
#define FULL_PAGE_HEIGHT 11.0 
 
#define UNKNOWN_ORIENT		0 
#define HORIZONTAL_ORIENT	1  
#define VERTICAL_ORIENT		2 
 
#ifdef __MSDOS__ 
extern unsigned int 
    _stklen = 16384;			     /* Increase default stack size. */ 
#endif /* __MSDOS__ */ 
 
#ifdef SYSV 
static char *VersionStr = 
        "Gif library module,\t\tGershon Elber\n\ 
	(C) Copyright 1989 Gershon Elber, Non commercial use only.\n"; 
static char 
    *CtrlStr = "Gif2PS q%- x%- y%- s%-SizeX|SizeY!F!F p%-PosX|PosY!F!F i%- n%-#Copies!d h%- GifFile!*s"; 
#else 
static char 
    *VersionStr = 
	PROGRAM_NAME 
	GIF_LIB_VERSION 
	"	Gershon Elber,	" 
	__DATE__ ",   " __TIME__ "\n" 
	"(C) Copyright 1989 Gershon Elber, Non commercial use only.\n"; 
static char 
    *CtrlStr = 
	PROGRAM_NAME 
	" q%- x%- y%- s%-SizeX|SizeY!F!F p%-PosX|PosY!F!F i%- n%-#Copies!d h%- GifFile!*s"; 
#endif /* SYSV */ 
 
/* Make some variables global, so we could access them faster: */ 
static int 
    ImageNum = 0, 
    BackGround = 0, 
    ForceXFlag = FALSE, 
    ForceYFlag = FALSE, 
    SizeFlag = FALSE, 
    PosFlag = FALSE, 
    InvertFlag = FALSE, 
    NumCopiesFlag = FALSE, 
    HelpFlag = FALSE, 
    NumOfCopies = 1, 
    InterlacedOffset[] = { 0, 4, 2, 1 }, /* The way Interlaced image should. */ 
    InterlacedJumps[] = { 8, 8, 4, 2 },    /* be read - offsets and jumps... */ 
    PSOrientation; 
static double PSSizeX, PSSizeY, PSPosX, PSPosY; 
static GifColorType 
    *ColorMap; 
 
static void DumpScreen2PS(GifRowType *ScreenBuffer, 
					int ScreenWidth, int ScreenHeight); 
static void PutString(unsigned char *Line, int Len); 
 
/****************************************************************************** 
* Interpret the command line and scan the given GIF file.		      * 
******************************************************************************/ 
void main(int argc, char **argv) 
{ 
    int	i, j, Error, NumFiles, Size, Row, Col, Width, Height, ExtCode, Count; 
    GifRecordType RecordType; 
    GifByteType *Extension; 
    char **FileName = NULL; 
    GifRowType *ScreenBuffer; 
    GifFileType *GifFile; 
 
    if ((Error = GAGetArgs(argc, argv, CtrlStr,&GifQuitePrint, 
		&ForceXFlag, &ForceYFlag, &SizeFlag, &PSSizeX, &PSSizeY, 
		&PosFlag, &PSPosX, &PSPosY, 
		&InvertFlag, &NumCopiesFlag, &NumOfCopies, &HelpFlag, 
		&NumFiles, &FileName)) != FALSE || 
		(NumFiles > 1 && !HelpFlag)) { 
	if (Error) 
	    GAPrintErrMsg(Error); 
	else if (NumFiles > 1) 
	    GIF_MESSAGE("Error in command line parsing - one GIF file please."); 
	GAPrintHowTo(CtrlStr); 
	exit(1); 
    } 
 
    if (HelpFlag) { 
	fprintf(stderr, VersionStr); 
	GAPrintHowTo(CtrlStr); 
	exit(0); 
    } 
 
    if (ForceXFlag) 
        PSOrientation = HORIZONTAL_ORIENT; 
    else if (ForceYFlag) 
        PSOrientation = VERTICAL_ORIENT; 
    else 
	PSOrientation = UNKNOWN_ORIENT; 
 
    if (NumFiles == 1) { 
	if ((GifFile = DGifOpenFileName(*FileName)) == NULL) { 
	    PrintGifError(); 
	    exit(-1); 
	} 
    } 
    else { 
	/* Use the stdin instead: */ 
 
#ifdef __MSDOS__ 
	setmode(0, O_BINARY); 
#endif /* __MSDOS__ */ 
	if ((GifFile = DGifOpenFileHandle(0)) == NULL) { 
	    PrintGifError(); 
	    exit(-1); 
	} 
    } 
 
    /* Allocate the screen as vector of column of rows. We cannt allocate    */ 
    /* the all screen at once, as this broken minded CPU can allocate up to  */ 
    /* 64k at a time and our image can be bigger than that:		     */ 
    /* Note this screen is device independent - its the screen as defined by */ 
    /* the GIF file parameters itself.					     */ 
    if ((ScreenBuffer = (GifRowType *) 
	malloc(GifFile -> SHeight * sizeof(GifRowType *))) == NULL) 
	    GIF_EXIT("Failed to allocate memory required, aborted."); 
 
    Size = GifFile -> SWidth * sizeof(GifPixelType);/* Size in bytes one row.*/ 
    if ((ScreenBuffer[0] = (GifRowType) malloc(Size)) == NULL) /* First row. */ 
	GIF_EXIT("Failed to allocate memory required, aborted."); 
 
    for (i = 0; i < GifFile -> SWidth; i++) /* Set its color to BackGround. */ 
	ScreenBuffer[0][i] = GifFile -> SBackGroundColor; 
    for (i = 1; i < GifFile -> SHeight; i++) { 
	/* Allocate the other rows, and set their color to background too:  */ 
	if ((ScreenBuffer[i] = (GifRowType) malloc(Size)) == NULL) 
	    GIF_EXIT("Failed to allocate memory required, aborted."); 
 
	memcpy(ScreenBuffer[i], ScreenBuffer[0], Size); 
    } 
 
    /* Scan the content of the GIF file and load the image(s) in: */ 
    do { 
	if (DGifGetRecordType(GifFile, &RecordType) == GIF_ERROR) { 
	    PrintGifError(); 
	    exit(-1); 
	} 
	switch (RecordType) { 
	    case IMAGE_DESC_RECORD_TYPE: 
		if (DGifGetImageDesc(GifFile) == GIF_ERROR) { 
		    PrintGifError(); 
		    exit(-1); 
		} 
		Row = GifFile -> ITop; /* Image Position relative to Screen. */ 
		Col = GifFile -> ILeft; 
		Width = GifFile -> IWidth; 
		Height = GifFile -> IHeight; 
		GifQprintf("\n%s: Image %d at (%d, %d) [%dx%d]:     ", 
		    PROGRAM_NAME, ++ImageNum, Col, Row, Width, Height); 
		if (GifFile -> ILeft + GifFile -> IWidth > GifFile -> SWidth || 
		   GifFile -> ITop + GifFile -> IHeight > GifFile -> SHeight) { 
		    fprintf(stderr, "Image %d is not confined to screen dimension, aborted.\n"); 
		    exit(-2); 
		} 
		if (GifFile -> IInterlace) { 
		    /* Need to perform 4 passes on the images: */ 
 		    for (Count = i = 0; i < 4; i++) 
			for (j = Row + InterlacedOffset[i]; j < Row + Height; 
						 j += InterlacedJumps[i]) { 
			    GifQprintf("\b\b\b\b%-4d", Count++); 
			    if (DGifGetLine(GifFile, &ScreenBuffer[j][Col], 
				Width) == GIF_ERROR) { 
				PrintGifError(); 
				exit(-1); 
			    } 
			} 
		} 
		else { 
		    for (i = 0; i < Height; i++) { 
			GifQprintf("\b\b\b\b%-4d", i); 
			if (DGifGetLine(GifFile, &ScreenBuffer[Row++][Col], 
				Width) == GIF_ERROR) { 
			    PrintGifError(); 
			    exit(-1); 
			} 
		    } 
		} 
		break; 
	    case EXTENSION_RECORD_TYPE: 
		/* Skip any extension blocks in file: */ 
		if (DGifGetExtension(GifFile, &ExtCode, &Extension) == GIF_ERROR) { 
		    PrintGifError(); 
		    exit(-1); 
		} 
		while (Extension != NULL) { 
		    if (DGifGetExtensionNext(GifFile, &Extension) == GIF_ERROR) { 
			PrintGifError(); 
			exit(-1); 
		    } 
		} 
		break; 
	    case TERMINATE_RECORD_TYPE: 
		break; 
	    default:		    /* Should be traps by DGifGetRecordType. */ 
		break; 
	} 
    } 
    while (RecordType != TERMINATE_RECORD_TYPE); 
 
    /* Lets display it - set the global variables required and do it: */ 
    BackGround = GifFile -> SBackGroundColor; 
    ColorMap = (GifFile -> IColorMap ? GifFile -> IColorMap : 
				       GifFile -> SColorMap); 
    DumpScreen2PS(ScreenBuffer, GifFile -> SWidth, GifFile -> SHeight); 
 
    if (DGifCloseFile(GifFile) == GIF_ERROR) { 
	PrintGifError(); 
	exit(-1); 
    } 
} 
 
/****************************************************************************** 
* The real dumping routine.						      * 
******************************************************************************/ 
static void DumpScreen2PS(GifRowType *ScreenBuffer, 
					int ScreenWidth, int ScreenHeight) 
{ 
    int i, j; 
    double Aspect; 
    GifByteType *OutLine, Data; 
    GifPixelType *Line; 
    GifColorType *ColorMapEntry; 
 
    /* If user did not enforce orientation, pick the best one. */ 
    if (PSOrientation == UNKNOWN_ORIENT) 
	if (ScreenWidth > ScreenHeight) 
	    PSOrientation = VERTICAL_ORIENT; 
	else 
	    PSOrientation = HORIZONTAL_ORIENT; 
 
    Aspect = ((double) ScreenHeight) / ((double) ScreenWidth); 
 
    if (!SizeFlag) 
	switch (PSOrientation) { 
            case HORIZONTAL_ORIENT: 
	        if (Aspect > PAGE_HEIGHT / PAGE_WIDTH) { 
		    PSSizeX = PAGE_HEIGHT / Aspect;  
		    PSSizeY = PAGE_HEIGHT; 
		} 
		else { 
		    PSSizeX = PAGE_WIDTH; 
		    PSSizeY = PAGE_WIDTH * Aspect; 
		} 
		break; 
	    case VERTICAL_ORIENT: 
	        if (1 / Aspect > PAGE_HEIGHT / PAGE_WIDTH) { 
		    PSSizeX = PAGE_HEIGHT * Aspect;  
		    PSSizeY = PAGE_HEIGHT; 
		} 
		else { 
		    PSSizeX = PAGE_WIDTH; 
		    PSSizeY = PAGE_WIDTH / Aspect; 
		} 
		break; 
	} 
    else { 
	if (PAGE_WIDTH < PSSizeX) { 
	    GIF_MESSAGE("X Size specified is too big, page size selected."); 
	    PSSizeX = PAGE_WIDTH; 
	} 
	if (PAGE_HEIGHT < PSSizeY) { 
	    GIF_MESSAGE("Y Size specified is too big, page size selected."); 
	    PSSizeX = PAGE_HEIGHT; 
	} 
    } 
 
    if (!PosFlag) { 
	PSPosX = (FULL_PAGE_WIDTH - PSSizeX) / 2; 
	PSPosY = (FULL_PAGE_HEIGHT - PSSizeY) / 2; 
    } 
    else { 
	if (PSPosX + PSSizeX > PAGE_WIDTH || PSPosY + PSSizeY > PAGE_HEIGHT) 
	    GIF_EXIT("Requested position will put image out of page, aborted."); 
    } 
 
    /* Time to dump out the PostScript header: */ 
    printf("%%!\n"); 
    printf("%%%%Creator: %s\n", PROGRAM_NAME); 
    printf("/#copies %d def\n", NumOfCopies); 
    printf("gsave\n"); 
    printf("72 72 scale\t\t\t\t%% Lets talk inches.\n"); 
    printf("/oneline %d string def\t\t\t%% Allocate one scan line.\n", 
	   ScreenWidth); 
    printf("/drawimage {\n"); 
    printf("\t%d %d 8 [%d 0 0 %d 0 %d]\n", ScreenWidth, ScreenHeight, 
	   ScreenWidth, -ScreenHeight, ScreenHeight); 
    printf("\t{ currentfile oneline readhexstring pop } image\n"); 
    printf("} def\n"); 
    switch (PSOrientation) { 
        case HORIZONTAL_ORIENT: 
	    printf("%lf %lf translate\n", PSPosX, PSPosY); 
	    printf("%lf %lf scale\n", PSSizeX, PSSizeY); 
	    break; 
	case VERTICAL_ORIENT: 
	    printf("%lf %lf translate\n", PSPosX + PSSizeX, PSPosY); 
	    printf("90 rotate\n"); 
	    printf("%lf %lf scale\n", PSSizeY, PSSizeX); 
	    break; 
    } 
    printf("drawimage\n"); 
 
    if ((OutLine = (GifByteType *) malloc(sizeof(GifByteType) * ScreenWidth)) 
								== NULL) 
	GIF_EXIT("Failed to allocate memory required, aborted."); 
 
    for (i = 0; i < ScreenHeight; i++) { 
	GifQprintf("\b\b\b\b%-4d", ScreenHeight - i); 
 
	Line = ScreenBuffer[i]; 
	for (j = 0; j < ScreenWidth; j++) { 
	    ColorMapEntry = &ColorMap[Line[j]]; 
	    Data = (30 * ((unsigned int) ColorMapEntry->Red) + 
		    59 * ((unsigned int) ColorMapEntry->Green) + 
		    11 * ((unsigned int) ColorMapEntry->Blue)) / 100; 
	    OutLine[j] = InvertFlag ? 255 - Data : Data; 
	} 
 
	PutString(OutLine, ScreenWidth); 
    } 
    free(OutLine); 
 
    printf("\nshowpage\n"); 
    printf("grestore\n"); 
} 
 
/****************************************************************************** 
* Dumps the string of given length as 2 hexdigits per byte 39 bytes per line. * 
******************************************************************************/ 
static void PutString(unsigned char *Line, int Len) 
{ 
    int i; 
    static Counter = 0; 
    static char *Hex = "0123456789ABCDEF"; 
 
    for (i = 0; i < Len; i++) { 
	if (++Counter % 40 == 0) { 
	    putchar('\n'); 
	    Counter = 1; 
	} 
	putchar(Hex[Line[i] >> 4]); 
	putchar(Hex[Line[i] & 0x0f]); 
    } 
}