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/*****************************************************************************
* "Gifinfo" *
* *
* Written by: Martin Edlman Ver 0.1.0, Jul. 1989 *
******************************************************************************
* Program to display information (size and comments) in GIF file. *
* uses libungif on Linux. Not tried on other systems. *
* Options: *
* -h : on-line help. *
* -f : format output string *
* \h - height *
* \w - width *
* \c - comment *
* \f - file name *
* Example: -f 'Image \f:\n Size: \wx\h\n Comment: \c\n' *
******************************************************************************
* History: *
* 21 Jun 99 - Version 1.0 by Martin Edlman. *
*****************************************************************************/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef __MSDOS__
#include <graphics.h>
#include <alloc.h>
#include <io.h>
#include <dos.h>
#include <bios.h>
#endif /* __MSDOS__ */
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif /* HAVE_FCNTL_H */
#include "gif_lib.h"
#include "getarg.h"
#define PROGRAM_NAME "GifInfo"
#define DEFAULTFORMAT "Size: \\wx\\h\\nComment: \\c\\n"
#ifdef __MSDOS__
extern unsigned int
_stklen = 16384; /* Increase default stack size. */
#endif /* __MSDOS__ */
#ifdef SYSV
static char *VersionStr =
"Gif toolkit module,\t\tMartin Edlman\n\
(C) Copyright 1999 Martin Edlman.\n";
static char
*CtrlStr = "GifInfo f%-Format!s h%- GifFile!*s";
#else
static char
*VersionStr =
PROGRAM_NAME
GIF_LIB_VERSION
" Martin Edlman, "
__DATE__ ", " __TIME__ "\n"
"(C) Copyright 1999 Martin Edlman.\n";
static char
*CtrlStr =
PROGRAM_NAME
" f%-Format!s h%- GifFile!*s";
#endif /* SYSV */
/* Make some variables global, so we could access them faster: */
static int
HelpFlag = FALSE;
/******************************************************************************
* Interpret the command line and scan the given GIF file. *
******************************************************************************/
int main(int argc, char **argv)
{
int i, Error, NumFiles, NumFormats, Size, Width=0, Height=0, ExtCode;
GifRecordType RecordType;
GifByteType *Extension;
char *Format = NULL, *Comment;
char **FileName = NULL;
GifRowType RowBuffer;
GifFileType *GifFile;
if ((Error = GAGetArgs(argc, argv, CtrlStr, &NumFormats, &Format,
&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(EXIT_FAILURE);
}
if (Format == NULL) {
Format = malloc(strlen(DEFAULTFORMAT)+1);
strcpy(Format, DEFAULTFORMAT);
}
if (HelpFlag) {
fprintf(stderr, VersionStr);
GAPrintHowTo(CtrlStr);
printf("Format: quoted text string used for formating of information\n");
printf(" Special characters for various information can be used\n");
printf(" \\f - filename of GIF file\n");
printf(" \\c - comment\n");
printf(" \\w - width of image\n");
printf(" \\h - height of image\n");
printf(" \\n - new line\n");
printf(" \\\\ - backslash\n");
printf("Default format will be used if not specified with -f:\n");
printf(" %s\n\n", DEFAULTFORMAT);
exit(EXIT_SUCCESS);
}
if (NumFiles == 1) {
if ((GifFile = DGifOpenFileName(*FileName)) == NULL) {
PrintGifError();
exit(EXIT_FAILURE);
}
}
else {
/* Use the stdin instead: */
#ifdef __MSDOS__
setmode(0, O_BINARY);
#endif /* __MSDOS__ */
if ((GifFile = DGifOpenFileHandle(0)) == NULL) {
PrintGifError();
exit(EXIT_FAILURE);
}
}
Comment = (char*) malloc(1);
strcpy(Comment, "\0");
/* Allocate memory or one row which will be used as trash during reading
image*/
Size = GifFile->SWidth * sizeof(GifPixelType);/* Size in bytes one row.*/
if ((RowBuffer = (GifRowType) malloc(Size)) == NULL) /* First row. */
GIF_EXIT("Failed to allocate memory required, aborted.");
/* Scan the content of the GIF file and load the image(s) in: */
do {
if (DGifGetRecordType(GifFile, &RecordType) == GIF_ERROR) {
PrintGifError();
exit(EXIT_FAILURE);
}
switch (RecordType) {
case IMAGE_DESC_RECORD_TYPE:
if (DGifGetImageDesc(GifFile) == GIF_ERROR) {
PrintGifError();
exit(EXIT_FAILURE);
}
Width = GifFile->Image.Width;
Height = GifFile->Image.Height;
if (GifFile->Image.Left + GifFile->Image.Width > GifFile->SWidth ||
GifFile->Image.Top + GifFile->Image.Height > GifFile->SHeight) {
fprintf(stderr, "Image %d is not confined to screen dimension, aborted.\n", GifFile->ImageCount);
exit(EXIT_FAILURE);
}
/* We don't care about Interlaced as image is not interesting, read sequentialy */
for (i = 0; i < Height; i++) {
GifQprintf("\b\b\b\b%-4d", i);
if (DGifGetLine(GifFile, &RowBuffer[0], Width) == GIF_ERROR) {
PrintGifError();
exit(EXIT_FAILURE);
}
}
break;
case EXTENSION_RECORD_TYPE:
/* Skip any extension blocks in file except comments: */
if (DGifGetExtension(GifFile, &ExtCode, &Extension) == GIF_ERROR) {
PrintGifError();
exit(EXIT_FAILURE);
}
while (Extension != NULL) {
if(ExtCode == COMMENT_EXT_FUNC_CODE) {
Extension[Extension[0]+1] = '\000'; /* Convert gif's pascal-like string */
Comment = (char*) realloc(Comment, strlen(Comment) + Extension[0] + 1);
strcat(Comment, (char*)Extension+1);
}
if (DGifGetExtensionNext(GifFile, &Extension) == GIF_ERROR) {
PrintGifError();
exit(EXIT_FAILURE);
}
}
break;
case TERMINATE_RECORD_TYPE:
break;
default: /* Should be traps by DGifGetRecordType. */
break;
}
}
while (RecordType != TERMINATE_RECORD_TYPE);
while (Format[0] != '\0') {
if (Format[0] == '\\') {
Format++;
switch (Format[0]) {
case 'w': printf("%i", Width); break;
case 'h': printf("%i", Height); break;
case 'c': printf("%s", Comment); break;
case 'f': printf("%s", *FileName); break;
case 'n': printf("\n"); break;
default: printf("%c", Format[0]); break;
}
}
else {
printf("%c", Format[0]);
}
Format++;
}
if (DGifCloseFile(GifFile) == GIF_ERROR) {
PrintGifError();
exit(EXIT_FAILURE);
}
return 0;
}
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