/******************************************************************************
* Interpret the command line and scan the given GIF file. *
******************************************************************************/
int main(int argc, char **argv)
{
int Error, NumFiles, ExtCode, CodeSize, ImageNum = 0,
ImageNFlag = FALSE, ImageN, HelpFlag = FALSE, HasGIFOutput;
GifRecordType RecordType;
GifByteType *Extension, *CodeBlock;
char **FileName = NULL, *ColorFileName, *TranslateFileName;
GifFileType *GifFileIn = NULL, *GifFileOut = NULL;
if ((Error = GAGetArgs(argc, argv, CtrlStr, &GifQuietPrint, &SaveFlag,
&TranslateFlag, &TranslateFileName,
&LoadFlag, &ColorFileName,
&GammaFlag, &Gamma, &ImageNFlag, &ImageN,
&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) {
fprintf(stderr, VersionStr);
GAPrintHowTo(CtrlStr);
exit(EXIT_SUCCESS);
}
if (SaveFlag + LoadFlag + GammaFlag + TranslateFlag > 1)
GIF_EXIT("Can not handle more than one of -s -l, -t, or -g at the same time.");
if (NumFiles == 1) {
if ((GifFileIn = DGifOpenFileName(*FileName)) == NULL)
QuitGifError(GifFileIn, GifFileOut);
}
else {
/* Use stdin instead: */
if ((GifFileIn = DGifOpenFileHandle(0)) == NULL)
QuitGifError(GifFileIn, GifFileOut);
}
if (SaveFlag) {
/* We are dumping out the color map as text file to stdout: */
ColorFile = stdout;
}
else {
if (TranslateFlag) {
/* We are loading new color map from specified file: */
if ((TranslateFile = fopen(TranslateFileName, "rt")) == NULL)
GIF_EXIT("Failed to open specified color translation file.");
}
if (LoadFlag) {
/* We are loading new color map from specified file: */
if ((ColorFile = fopen(ColorFileName, "rt")) == NULL)
GIF_EXIT("Failed to open specified color map file.");
}
}
if ((HasGIFOutput = (LoadFlag || TranslateFlag || GammaFlag)) != 0) {
/* Open stdout for GIF output file: */
if ((GifFileOut = EGifOpenFileHandle(1)) == NULL)
QuitGifError(GifFileIn, GifFileOut);
}
if (!ImageNFlag) {
/* We are suppose to modify the screen color map, so do it: */
GifFileIn->SColorMap = ModifyColorMap(GifFileIn->SColorMap);
if (!HasGIFOutput) {
/* We can quit here, as we have the color map: */
if (GifFileIn != NULL) DGifCloseFile(GifFileIn);
fclose(ColorFile);
exit(EXIT_SUCCESS);
}
}
/* And dump out its new possible repositioned screen information: */
if (HasGIFOutput)
if (EGifPutScreenDesc(GifFileOut,
GifFileIn->SWidth, GifFileIn->SHeight,
GifFileIn->SColorResolution, GifFileIn->SBackGroundColor,
GifFileIn->SColorMap) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
/* 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 ((++ImageNum == ImageN) && ImageNFlag) {
/* We are suppose to modify this image color map, do it: */
GifFileIn->SColorMap =ModifyColorMap(GifFileIn->SColorMap);
if (!HasGIFOutput) {
/* We can quit here, as we have the color map: */
if (GifFileIn != NULL) DGifCloseFile(GifFileIn);
fclose(ColorFile);
exit(EXIT_SUCCESS);
}
}
if (HasGIFOutput)
if (EGifPutImageDesc(GifFileOut,
GifFileIn->Image.Left, GifFileIn->Image.Top,
GifFileIn->Image.Width, GifFileIn->Image.Height,
GifFileIn->Image.Interlace,
GifFileIn->Image.ColorMap) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (!TranslateFlag || (ImageNFlag && (ImageN != ImageNum)))
{
/* Now read image itself in decoded form as we don't */
/* really care what we have there, and this is much */
/* faster. */
if (DGifGetCode(GifFileIn, &CodeSize, &CodeBlock) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (HasGIFOutput)
if (EGifPutCode(GifFileOut, CodeSize, CodeBlock) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
while (CodeBlock != NULL) {
if (DGifGetCodeNext(GifFileIn, &CodeBlock) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (HasGIFOutput)
if (EGifPutCodeNext(GifFileOut, CodeBlock) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
}
}
else /* we need to mung pixels intices */
{
int i;
register GifPixelType *cp;
GifPixelType *Line
= (GifPixelType *) malloc(GifFileIn->Image.Width *
sizeof(GifPixelType));
for (i = 0; i < GifFileIn->Image.Height; i++) {
if (DGifGetLine(GifFileIn, Line,GifFileIn->Image.Width)
== GIF_ERROR) {
QuitGifError(GifFileIn, GifFileOut);
}
/* translation step goes here */
for (cp = Line; cp < Line+GifFileIn->Image.Width; cp++)
*cp = Translation[*cp];
if (EGifPutLine(GifFileOut,
Line, GifFileIn->Image.Width)
== GIF_ERROR) {
QuitGifError(GifFileIn, GifFileOut);
}
}
free((char *) Line);
}
break;
case EXTENSION_RECORD_TYPE:
/* Skip any extension blocks in file: */
if (DGifGetExtension(GifFileIn, &ExtCode, &Extension) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (HasGIFOutput)
if (EGifPutExtension(GifFileOut, ExtCode, Extension[0],
Extension) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
/* No support to more than one extension blocks, so discard: */
while (Extension != NULL) {
if (DGifGetExtensionNext(GifFileIn, &Extension) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
}
break;
case TERMINATE_RECORD_TYPE:
break;
default: /* Should be traps by DGifGetRecordType. */
break;
}
}
while (RecordType != TERMINATE_RECORD_TYPE);
if (DGifCloseFile(GifFileIn) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (HasGIFOutput)
if (EGifCloseFile(GifFileOut) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
return 0;
}
/******************************************************************************
Main sequence
******************************************************************************/
int main(int argc, char **argv)
{
GifFileType *GifFileIn = NULL, *GifFileOut = NULL;
GifRecordType RecordType;
int CodeSize, ExtCode, ErrorCode;
GifByteType *CodeBlock, *Extension;
/*
* Command-line processing goes here.
*/
/* Use stdin as input (note this also read screen descriptor in: */
if ((GifFileIn = DGifOpenFileHandle(0, &ErrorCode)) == NULL) {
PrintGifError(ErrorCode);
exit(EXIT_FAILURE);
}
/* Use the stdout as output: */
if ((GifFileOut = EGifOpenFileHandle(1, &ErrorCode)) == NULL) {
PrintGifError(ErrorCode);
exit(EXIT_FAILURE);
}
/* And dump out its screen information: */
if (EGifPutScreenDesc(GifFileOut,
GifFileIn->SWidth, GifFileIn->SHeight,
GifFileIn->SColorResolution, GifFileIn->SBackGroundColor,
GifFileIn->SColorMap) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
/* Scan the content of the input 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);
/* Put image descriptor to out file: */
if (EGifPutImageDesc(GifFileOut,
GifFileIn->Image.Left, GifFileIn->Image.Top,
GifFileIn->Image.Width, GifFileIn->Image.Height,
GifFileIn->Image.Interlace,
GifFileIn->Image.ColorMap) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
/* Now read image itself in decoded form as we dont really */
/* care what we have there, and this is much faster. */
if (DGifGetCode(GifFileIn, &CodeSize, &CodeBlock) == GIF_ERROR ||
EGifPutCode(GifFileOut, CodeSize, CodeBlock) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
while (CodeBlock != NULL) {
if (DGifGetCodeNext(GifFileIn, &CodeBlock) == GIF_ERROR ||
EGifPutCodeNext(GifFileOut, CodeBlock) == 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 (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);
if (GifFileIn != NULL) {
EGifCloseFile(GifFileIn, NULL);
}
exit(EXIT_FAILURE);
}
if (EGifCloseFile(GifFileOut, &ErrorCode) == GIF_ERROR)
{
PrintGifError(ErrorCode);
if (GifFileOut != NULL) {
EGifCloseFile(GifFileOut, NULL);
}
exit(EXIT_FAILURE);
}
return 0;
}
/******************************************************************************
* Perform the assembly operation - take few input files into one output. *
******************************************************************************/
static void DoAssembly(int NumFiles, char **FileNames)
{
int i, ExtCode, CodeSize;
GifRecordType RecordType;
GifByteType *Extension, *CodeBlock;
GifFileType *GifFileIn = NULL, *GifFileOut = NULL;
/* Open stdout for the output file: */
if ((GifFileOut = EGifOpenFileHandle(1)) == NULL)
QuitGifError(GifFileIn, GifFileOut);
/* Scan the content of the GIF file and load the image(s) in: */
for (i = 0; i < NumFiles; i++) {
if ((GifFileIn = DGifOpenFileName(FileNames[i])) == NULL)
QuitGifError(GifFileIn, GifFileOut);
/* And dump out screen descriptor iff its first image. */
if (i == 0)
if (EGifPutScreenDesc(GifFileOut,
GifFileIn -> SWidth, GifFileIn -> SHeight,
GifFileIn -> SColorResolution, GifFileIn -> SBackGroundColor,
GifFileIn -> SBitsPerPixel, GifFileIn -> SColorMap) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
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);
/* Put image descriptor to out file: */
if (EGifPutImageDesc(GifFileOut,
GifFileIn -> ILeft, GifFileIn -> ITop,
GifFileIn -> IWidth, GifFileIn -> IHeight,
GifFileIn -> IInterlace, GifFileIn -> IBitsPerPixel,
GifFileIn -> IColorMap) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
/* Now read image itself in decoded form as we dont */
/* dont care what is there, and this is much faster. */
if (DGifGetCode(GifFileIn, &CodeSize, &CodeBlock) == GIF_ERROR
|| EGifPutCode(GifFileOut, CodeSize, CodeBlock) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
while (CodeBlock != NULL)
if (DGifGetCodeNext(GifFileIn, &CodeBlock) == GIF_ERROR ||
EGifPutCodeNext(GifFileOut, CodeBlock) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
break;
case EXTENSION_RECORD_TYPE:
/* Skip any extension blocks in file: */
if (DGifGetExtension(GifFileIn, &ExtCode, &Extension)
== GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (EGifPutExtension(GifFileOut, ExtCode, Extension[0],
Extension) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
/* No support to more than one extension blocks, discard.*/
while (Extension != NULL)
if (DGifGetExtensionNext(GifFileIn, &Extension)
== GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
break;
case TERMINATE_RECORD_TYPE:
break;
default: /* Should be traps by DGifGetRecordType. */
break;
}
}
while (RecordType != TERMINATE_RECORD_TYPE);
if (DGifCloseFile(GifFileIn) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
}
if (EGifCloseFile(GifFileOut) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
}
/******************************************************************************
* Perform the disassembly operation - take one input files into few output. *
******************************************************************************/
static int DoDisassemblyNum(const char *InFileName, char *OutFileName, int FileNum)
{
int ExtCode, CodeSize, FileEmpty;
GifRecordType RecordType;
char CrntFileName[80], *p;
GifByteType *Extension, *CodeBlock;
GifFileType *GifFileIn = NULL, *GifFileOut = NULL;
int ErrorCode;
/* If name has type postfix, strip it out, and make sure name is less */
/* or equal to 6 chars, so we will have 2 chars in name for numbers. */
//strupr(OutFileName); /* Make sure all is upper case */
#if 0
printf("OutFileName : %s\n", OutFileName);
if ((p = strrchr(OutFileName, '.')) != NULL && strlen(p) <= 4) p[0] = 0;
if ((p = strrchr(OutFileName, '/')) != NULL ||
(p = strrchr(OutFileName, '\\')) != NULL ||
(p = strrchr(OutFileName, ':')) != NULL) {
if (strlen(p) > 7) p[7] = 0; /* p includes the '/', '\\', ':' char */
}
else {
/* Only name is given for current directory: */
//if (strlen(OutFileName) > 6) OutFileName[6] = 0;
}
printf("OutFileName : %s\n", OutFileName);
#endif
/* Open input file: */
if (InFileName != NULL) {
if ((GifFileIn = DGifOpenFileName(InFileName, &ErrorCode)) == NULL)
return QuitGifError(GifFileIn, GifFileOut);
}
else {
/* Use the stdin instead: */
if ((GifFileIn = DGifOpenFileHandle(0, &ErrorCode)) == NULL)
return QuitGifError(GifFileIn, GifFileOut);
}
/* Scan the content of GIF file and dump image(s) to seperate file(s): */
//sprintf(CrntFileName, "%s_%02d.gif", OutFileName, FileNum);
sprintf(CrntFileName, "%s", OutFileName);
if ((GifFileOut = EGifOpenFileName(CrntFileName, TRUE, &ErrorCode)) == NULL)
return QuitGifError(GifFileIn, GifFileOut);
FileEmpty = TRUE;
/* And dump out its exactly same screen information: */
if (EGifPutScreenDesc(GifFileOut,
GifFileIn->SWidth, GifFileIn->SHeight,
GifFileIn->SColorResolution, GifFileIn->SBackGroundColor,
GifFileIn->SColorMap) == GIF_ERROR)
return QuitGifError(GifFileIn, GifFileOut);
do {
if (DGifGetRecordType(GifFileIn, &RecordType) == GIF_ERROR)
return QuitGifError(GifFileIn, GifFileOut);
switch (RecordType) {
case IMAGE_DESC_RECORD_TYPE:
FileEmpty = FALSE;
if (DGifGetImageDesc(GifFileIn) == GIF_ERROR)
return QuitGifError(GifFileIn, GifFileOut);
/* Put same image descriptor to out file: */
if (EGifPutImageDesc(GifFileOut,
GifFileIn->Image.Left, GifFileIn->Image.Top,
GifFileIn->Image.Width, GifFileIn->Image.Height,
GifFileIn->Image.Interlace,
GifFileIn->Image.ColorMap) == GIF_ERROR)
return QuitGifError(GifFileIn, GifFileOut);
/* Now read image itself in decoded form as we dont */
/* really care what is there, and this is much faster. */
if (DGifGetCode(GifFileIn, &CodeSize, &CodeBlock) == GIF_ERROR
|| EGifPutCode(GifFileOut, CodeSize, CodeBlock) == GIF_ERROR)
return QuitGifError(GifFileIn, GifFileOut);
while (CodeBlock != NULL)
if (DGifGetCodeNext(GifFileIn, &CodeBlock) == GIF_ERROR ||
EGifPutCodeNext(GifFileOut, CodeBlock) == GIF_ERROR)
return QuitGifError(GifFileIn, GifFileOut);
break;
case EXTENSION_RECORD_TYPE:
FileEmpty = FALSE;
/* Skip any extension blocks in file: */
if (DGifGetExtension(GifFileIn, &ExtCode, &Extension)
== GIF_ERROR)
return QuitGifError(GifFileIn, GifFileOut);
if (EGifPutExtension(GifFileOut, ExtCode, Extension[0],
Extension) == GIF_ERROR)
return QuitGifError(GifFileIn, GifFileOut);
/* No support to more than one extension blocks, discard */
while (Extension != NULL)
if (DGifGetExtensionNext(GifFileIn, &Extension)
== GIF_ERROR)
return QuitGifError(GifFileIn, GifFileOut);
break;
case TERMINATE_RECORD_TYPE:
break;
default: /* Should be traps by DGifGetRecordType */
break;
}
}
while (RecordType != IMAGE_DESC_RECORD_TYPE &&
RecordType != TERMINATE_RECORD_TYPE);
if (EGifCloseFile(GifFileOut, &ErrorCode) == GIF_ERROR)
return QuitGifError(GifFileIn, GifFileOut);
if (FileEmpty) {
/* Might happen on last file - delete it if so: */
unlink(CrntFileName);
}
if (DGifCloseFile(GifFileIn, &ErrorCode) == GIF_ERROR)
return QuitGifError(GifFileIn, GifFileOut);
}
/******************************************************************************
* Interpret the command line and scan the given GIF file. *
******************************************************************************/
int main(int argc, char **argv)
{
int i, Error, NumFiles, ExtCode, CodeSize, ImageNum = 0,
ImageFlag = FALSE, ImageNFlag = FALSE, ImageN, ImageX1, ImageY1,
ImageX2, ImageY2, ImageWidth, ImageDepth,
Complement = FALSE, HelpFlag = FALSE;
GifRecordType RecordType;
GifByteType *Extension, *CodeBlock;
char **FileName = NULL;
GifRowType Line;
GifFileType *GifFileIn = NULL, *GifFileOut = NULL;
/* Same image dimension vars for both Image & ImageN as only one allowed.*/
if ((Error = GAGetArgs(argc, argv, CtrlStr, &GifQuietPrint, &Complement,
&ImageFlag, &ImageX1, &ImageY1, &ImageX2, &ImageY2,
&ImageNFlag, &ImageN, &ImageX1, &ImageY1, &ImageX2, &ImageY2,
&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) {
fprintf(stderr, VersionStr);
GAPrintHowTo(CtrlStr);
exit(EXIT_SUCCESS);
}
/* Test to make sure exactly one of ImageFlag & ImageNFlag is set: */
if ((ImageFlag && ImageNFlag) || (!ImageFlag && !ImageNFlag)) {
GIF_MESSAGE("Exactly one of [-i ...] && [-n ...] please.");
GAPrintHowTo(CtrlStr);
exit(EXIT_FAILURE);
}
if (ImageFlag) ImageN = 1; /* Its first image we are after. */
/* Make sure the first coordinates of clipping box are smaller: */
if (ImageX1 > ImageX2) {
i = ImageX1;
ImageX1 = ImageX2;
ImageX2 = i;
}
if (ImageY1 > ImageY2) {
i = ImageX1;
ImageY1 = ImageY2;
ImageY2 = i;
}
if (NumFiles == 1) {
if ((GifFileIn = DGifOpenFileName(*FileName)) == NULL)
QuitGifError(GifFileIn, GifFileOut);
}
else {
/* Use the stdin instead: */
if ((GifFileIn = DGifOpenFileHandle(0)) == NULL)
QuitGifError(GifFileIn, GifFileOut);
}
/* Open stdout for the output file: */
if ((GifFileOut = EGifOpenFileHandle(1)) == NULL)
QuitGifError(GifFileIn, GifFileOut);
/* Width and depth of clipped image. */
if (!Complement)
ImageWidth = ImageX2 - ImageX1 + 1;
else
ImageWidth = GifFileIn->SWidth
- (ImageX2 != ImageX1) * (ImageX2 - ImageX1 + 1);
if (!Complement)
ImageDepth = ImageY2 - ImageY1 + 1;
else
ImageDepth = GifFileIn->SHeight
- (ImageY2 != ImageY1) * (ImageY2 - ImageY1 + 1);
/* And dump out exactly same screen information: */
if (EGifPutScreenDesc(GifFileOut,
GifFileIn->SWidth, GifFileIn->SHeight,
GifFileIn->SColorResolution, GifFileIn->SBackGroundColor,
GifFileIn->SColorMap) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
/* 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 (++ImageNum == ImageN) {
/* We can handle only non interlaced images here: */
if (GifFileIn->Image.Interlace)
GIF_EXIT("Image to clip is interlaced - use GifInter first.");
/* This is the image we should clip - test sizes and */
/* dump out new clipped screen descriptor if o.k. */
if (GifFileIn->Image.Width <= ImageX2 ||
GifFileIn->Image.Height <= ImageY2)
GIF_EXIT("Image is smaller than given clip dimensions.");
/* Put the image descriptor to out file: */
if (EGifPutImageDesc(GifFileOut,
GifFileIn->Image.Left, GifFileIn->Image.Top,
ImageWidth, ImageDepth,
FALSE, GifFileIn->Image.ColorMap) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
/* o.k. - read the image and clip it: */
Line = (GifRowType) malloc(GifFileIn->Image.Width *
sizeof(GifPixelType));
GifQprintf("\n%s: Image %d at (%d, %d) [%dx%d]: ",
PROGRAM_NAME, ImageNum,
GifFileIn->Image.Left, GifFileIn->Image.Top,
GifFileIn->Image.Width, GifFileIn->Image.Height);
/* Skip lines below ImageY1: */
for (i = 0; i < ImageY1; i++) {
if (DGifGetLine(GifFileIn, Line, GifFileIn->Image.Width)
== GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (Complement) {
if (ImageX1 == ImageX2) {
/* don't remove any vertical band */
if (EGifPutLine(GifFileOut, Line,
ImageWidth) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
}
else
{
if (EGifPutLine(GifFileOut, Line,
ImageX1) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (EGifPutLine(GifFileOut,
&Line[ImageX2 + 1],
GifFileIn->SWidth - (ImageX2 + 1)
) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
}
}
GifQprintf("\b\b\b\b%-4d", i);
}
/* Clip the lines from ImageY1 to ImageY2 (to X1 - X2): */
for (i = ImageY1; i <= ImageY2; i++) {
if (DGifGetLine(GifFileIn, Line, GifFileIn->Image.Width)
== GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (!Complement)
if (EGifPutLine(GifFileOut, &Line[ImageX1],
ImageWidth) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
GifQprintf("\b\b\b\b%-4d", i);
}
/* Skip lines above ImageY2: */
for (i = ImageY2 + 1; i < GifFileIn->Image.Height; i++) {
if (DGifGetLine(GifFileIn, Line, GifFileIn->Image.Width)
== GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (Complement) {
if (ImageX1 == ImageX2) {
/* don't remove any vertical band */
if (EGifPutLine(GifFileOut, Line,
ImageWidth) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
}
else
{
if (EGifPutLine(GifFileOut, Line,
ImageX1) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (EGifPutLine(GifFileOut,
&Line[ImageX2 + 1],
GifFileIn->SWidth - (ImageX2 + 1)
) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
}
}
GifQprintf("\b\b\b\b%-4d", i);
}
free((char *) Line);
}
else {
/* Copy the image as is (we dont modify this one): */
if (EGifPutImageDesc(GifFileOut,
GifFileIn->Image.Left, GifFileIn->Image.Top,
GifFileIn->Image.Width, GifFileIn->Image.Height,
GifFileIn->Image.Interlace,
GifFileIn->Image.ColorMap) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
/* Now read image itself in decoded form as we dont */
/* really care what is there, and this is much faster. */
if (DGifGetCode(GifFileIn, &CodeSize, &CodeBlock) == GIF_ERROR
|| EGifPutCode(GifFileOut, CodeSize, CodeBlock) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
while (CodeBlock != NULL)
if (DGifGetCodeNext(GifFileIn, &CodeBlock) == GIF_ERROR ||
EGifPutCodeNext(GifFileOut, CodeBlock) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
}
break;
case EXTENSION_RECORD_TYPE:
/* Skip any extension blocks in file: */
if (DGifGetExtension(GifFileIn, &ExtCode, &Extension) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (EGifPutExtension(GifFileOut, ExtCode, Extension[0],
Extension) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
/* No support to more than one extension blocks, so discard: */
while (Extension != NULL) {
if (DGifGetExtensionNext(GifFileIn, &Extension) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
}
break;
case TERMINATE_RECORD_TYPE:
break;
default: /* Should be traps by DGifGetRecordType. */
break;
}
}
while (RecordType != TERMINATE_RECORD_TYPE);
if (DGifCloseFile(GifFileIn) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
if (EGifCloseFile(GifFileOut) == GIF_ERROR)
QuitGifError(GifFileIn, GifFileOut);
return 0;
}
