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/*****************************************************************************
giffix - attempt to fix a truncated GIF
SPDX-License-Identifier: MIT
*****************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdbool.h>
#include "gif_lib.h"
#include "getarg.h"
#define PROGRAM_NAME "giffix"
__attribute__((__section__(".tizen.build-id")))
static char
VersionStr[] =
PROGRAM_NAME
VERSION_COOKIE
" Gershon Elber, "
__DATE__ ", " __TIME__ "\n"
"(C) Copyright 1989 Gershon Elber.\n";
static char
*CtrlStr =
PROGRAM_NAME
" v%- h%- GifFile!*s";
static void QuitGifError(GifFileType *GifFileIn, GifFileType *GifFileOut);
/******************************************************************************
Interpret the command line and scan the given GIF file.
******************************************************************************/
int main(int argc, char **argv)
{
int i, j, NumFiles, ExtCode, Row, Col, Width, Height, ErrorCode,
DarkestColor = 0, ColorIntens = 10000;
bool Error, HelpFlag = false;
GifRecordType RecordType;
GifByteType *Extension;
char **FileName = NULL;
GifRowType LineBuffer;
ColorMapObject *ColorMap;
GifFileType *GifFileIn = NULL, *GifFileOut = NULL;
int ImageNum = 0;
if ((Error = GAGetArgs(argc, argv, CtrlStr, &GifNoisyPrint, &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 (HelpFlag) {
(void)fprintf(stderr, VersionStr, GIFLIB_MAJOR, GIFLIB_MINOR);
GAPrintHowTo(CtrlStr);
exit(EXIT_SUCCESS);
}
if (NumFiles == 1) {
if ((GifFileIn = DGifOpenFileName(*FileName, &ErrorCode)) == NULL) {
PrintGifError(ErrorCode);
exit(EXIT_FAILURE);
}
}
else
{
/* Use stdin instead: */
if ((GifFileIn = DGifOpenFileHandle(0, &ErrorCode)) == NULL) {
PrintGifError(ErrorCode);
exit(EXIT_FAILURE);
}
}
/* Open stdout for the output file: */
if ((GifFileOut = EGifOpenFileHandle(1, &ErrorCode)) == NULL) {
PrintGifError(ErrorCode);
exit(EXIT_FAILURE);
}
/* Dump out exactly same screen information: */
/* coverity[var_deref_op] */
if (EGifPutScreenDesc(GifFileOut,
GifFileIn->SWidth, GifFileIn->SHeight,
GifFileIn->SColorResolution, GifFileIn->SBackGroundColor,
GifFileIn->SColorMap) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if ((LineBuffer = (GifRowType) malloc(GifFileIn->SWidth)) == NULL)
GIF_EXIT("Failed to allocate memory required, aborted.");
/* Scan the content of the GIF file and load the image(s) in: */
do {
if (DGifGetRecordType(GifFileIn, &RecordType) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
switch (RecordType) {
case IMAGE_DESC_RECORD_TYPE:
if (DGifGetImageDesc(GifFileIn) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (GifFileIn->Image.Interlace)
GIF_EXIT("Cannot fix interlaced images.");
Row = GifFileIn->Image.Top; /* Image Position relative to Screen. */
Col = GifFileIn->Image.Left;
Width = GifFileIn->Image.Width;
Height = GifFileIn->Image.Height;
GifQprintf("\n%s: Image %d at (%d, %d) [%dx%d]: ",
PROGRAM_NAME, ++ImageNum, Col, Row, Width, Height);
if (Width > GifFileIn->SWidth)
GIF_EXIT("Image is wider than total");
/* Put the image descriptor to out file: */
if (EGifPutImageDesc(GifFileOut, Col, Row, Width, Height,
false, GifFileIn->Image.ColorMap) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
/* Find the darkest color in color map to use as a filler. */
ColorMap = (GifFileIn->Image.ColorMap ? GifFileIn->Image.ColorMap :
GifFileIn->SColorMap);
for (i = 0; i < ColorMap->ColorCount; i++) {
j = ((int) ColorMap->Colors[i].Red) * 30 +
((int) ColorMap->Colors[i].Green) * 59 +
((int) ColorMap->Colors[i].Blue) * 11;
if (j < ColorIntens) {
ColorIntens = j;
DarkestColor = i;
}
}
/* Load the image, and dump it. */
for (i = 0; i < Height; i++) {
GifQprintf("\b\b\b\b%-4d", i);
if (DGifGetLine(GifFileIn, LineBuffer, Width)
== GIF_ERROR) break;
if (EGifPutLine(GifFileOut, LineBuffer, Width)
== GIF_ERROR) QuitGifError(GifFileIn, GifFileOut);
}
if (i < Height) {
fprintf(stderr,"\nFollowing error occurred (and ignored):");
PrintGifError(GifFileIn->Error);
/* Fill in with the darkest color in color map. */
for (j = 0; j < Width; j++)
LineBuffer[j] = DarkestColor;
for (; i < Height; i++)
if (EGifPutLine(GifFileOut, LineBuffer, Width)
== GIF_ERROR) QuitGifError(GifFileIn, GifFileOut);
}
break;
case EXTENSION_RECORD_TYPE:
/* pass through extension records */
if (DGifGetExtension(GifFileIn, &ExtCode, &Extension) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (EGifPutExtensionLeader(GifFileOut, ExtCode) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (Extension != NULL)
if (EGifPutExtensionBlock(GifFileOut,
Extension[0],
Extension + 1) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
while (Extension != NULL) {
if (DGifGetExtensionNext(GifFileIn, &Extension)==GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (Extension != NULL)
if (EGifPutExtensionBlock(GifFileOut,
Extension[0],
Extension + 1) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
}
if (EGifPutExtensionTrailer(GifFileOut) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
break;
case TERMINATE_RECORD_TYPE:
break;
default: /* Should be trapped by DGifGetRecordType. */
break;
}
}
while (RecordType != TERMINATE_RECORD_TYPE);
if (DGifCloseFile(GifFileIn, &ErrorCode) == GIF_ERROR) {
PrintGifError(ErrorCode);
exit(EXIT_FAILURE);
}
if (EGifCloseFile(GifFileOut, &ErrorCode) == GIF_ERROR) {
PrintGifError(ErrorCode);
exit(EXIT_FAILURE);
}
return 0;
}
/******************************************************************************
Close both input and output file (if open), and exit.
******************************************************************************/
static void QuitGifError(GifFileType *GifFileIn, GifFileType *GifFileOut)
{
fprintf(stderr, "\nFollowing unrecoverable error occurred:");
if (GifFileIn != NULL) {
PrintGifError(GifFileIn->Error);
EGifCloseFile(GifFileIn, NULL);
}
if (GifFileOut != NULL) {
PrintGifError(GifFileOut->Error);
EGifCloseFile(GifFileOut, NULL);
}
exit(EXIT_FAILURE);
}
/* end */
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