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- /*****************************************************************************
- * "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 <graphics.h>
- #include <stdlib.h>
- #include <alloc.h>
- #include <io.h>
- #include <dos.h>
- #include <bios.h>
- #endif /* __MSDOS__ */
-
- #include <stdio.h>
- #include <ctype.h>
- #include <string.h>
- #include <fcntl.h>
- #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]);
- }
- }
-