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/*****************************************************************************
* "Gif-Lib" - Yet another gif library. *
* *
* Written by: Gershon Elber Ver 0.1, Jul. 1989 *
******************************************************************************
* Program to convert RLE (utah raster toolkit) file to GIF format. *
* Options: *
* -q : quiet printing mode. *
* -c #colors : in power of two, i.e. 7 will allow upto 128 colors in output. *
* -h : on-line help. *
******************************************************************************
* History: *
* 5 Jan 90 - Version 1.0 by Gershon Elber. *
*****************************************************************************/
#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"
#include "rle.h" /* The rle tool kit header files. */
#define PROGRAM_NAME "Rle2Gif"
#ifdef __MSDOS__
extern unsigned int
_stklen = 16384; /* Increase default stack size. */
#endif /* __MSDOS__ */
#ifdef SYSV
static char *VersionStr =
"Gif toolkit module,\t\tGershon Elber\n\
(C) Copyright 1989 Gershon Elber.\n";
static char
*CtrlStr = "Rle2Gif q%- c%-#Colors!d h%- RleFile!*s";
#else
static char
*VersionStr =
PROGRAM_NAME
GIF_LIB_VERSION
" Gershon Elber, "
__DATE__ ", " __TIME__ "\n"
"(C) Copyright 1989 Gershon Elber.\n";
static char
*CtrlStr =
PROGRAM_NAME
" q%- c%-#Colors!d h%- RleFile!*s";
#endif /* SYSV */
/* Make some variables global, so we could access them faster: */
static int
ColorFlag = FALSE,
ExpNumOfColors = 8,
HelpFlag = FALSE,
ColorMapSize = 256;
static void LoadRle(char *FileName,
GifByteType **RedBuffer,
GifByteType **GreenBuffer,
GifByteType **BlueBuffer,
int *Width, int *Height);
static void SaveGif(GifByteType *OutputBuffer,
ColorMapObject *OutputColorMap,
int ExpColorMapSize, int Width, int Height);
static void QuitGifError(GifFileType *GifFile);
/******************************************************************************
* Interpret the command line and scan the given GIF file. *
******************************************************************************/
int main(int argc, char **argv)
{
int i, j, Error, NumFiles, Width, Height;
char **FileName = NULL;
GifByteType *RedBuffer = NULL, *GreenBuffer = NULL, *BlueBuffer = NULL,
*OutputBuffer = NULL;
ColorMapObject *OutputColorMap = NULL;
if ((Error = GAGetArgs(argc, argv, CtrlStr, &GifQuietPrint,
&ColorFlag, &ExpNumOfColors, &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);
}
ColorMapSize = 1 << ExpNumOfColors;
if (NumFiles == 1) {
LoadRle(*FileName,
&RedBuffer, &GreenBuffer, &BlueBuffer, &Width, &Height);
}
else {
LoadRle(NULL,
&RedBuffer, &GreenBuffer, &BlueBuffer, &Width, &Height);
}
if ((OutputColorMap = MakeMapObject(ColorMapSize, NULL)) == NULL ||
(OutputBuffer = (GifByteType *) malloc(Width * Height *
sizeof(GifByteType))) == NULL)
GIF_EXIT("Failed to allocate memory required, aborted.");
if (QuantizeBuffer(Width, Height, &ColorMapSize,
RedBuffer, GreenBuffer, BlueBuffer,
OutputBuffer, OutputColorMap->Colors) == GIF_ERROR)
QuitGifError(NULL);
free((char *) RedBuffer);
free((char *) GreenBuffer);
free((char *) BlueBuffer);
SaveGif(OutputBuffer, OutputColorMap, ExpNumOfColors, Width, Height);
return 0;
}
/******************************************************************************
* Load RLE file into internal frame buffer. *
******************************************************************************/
static void LoadRle(char *FileName,
GifByteType **RedBuffer,
GifByteType **GreenBuffer,
GifByteType **BlueBuffer,
int *Width, int *Height)
{
int i, j, k, Size;
GifByteType *OutputPtr[3];
rle_hdr in_hdr;
rle_pixel **rows, *ptr;
if (FileName != NULL) {
if ((in_hdr.rle_file = fopen(FileName, "r")) == NULL)
GIF_EXIT("Can't open input file name.");
}
else
in_hdr.rle_file = stdin;
rle_get_setup_ok( &in_hdr, "rle2gif", FileName );
*Width = in_hdr.xmax - in_hdr.xmin + 1;
*Height = in_hdr.ymax - in_hdr.ymin + 1;
if (in_hdr.ncolors != 3)
GIF_EXIT("Input Rle file does not hold 3 (RGB) colors, aborted.");
Size = *Width * *Height * sizeof(GifByteType);
if (rle_row_alloc(&in_hdr, &rows) ||
(*RedBuffer = (GifByteType *) malloc(Size)) == NULL ||
(*GreenBuffer = (GifByteType *) malloc(Size)) == NULL ||
(*BlueBuffer = (GifByteType *) malloc(Size)) == NULL)
GIF_EXIT("Failed to allocate memory required, aborted.");
OutputPtr[0] = *RedBuffer;
OutputPtr[1] = *GreenBuffer;
OutputPtr[2] = *BlueBuffer;
for (i = 0; i < *Height; i++) {
rle_getrow(&in_hdr, rows); /* Get one scan line (3 colors). */
for (j = 0; j < 3; j++) { /* Copy the 3 colors to the given buffers. */
ptr = &rows[j][in_hdr.xmin];
for (k = 0; k < *Width; k++)
*OutputPtr[j]++ = *ptr++;
}
}
}
/******************************************************************************
* Save the GIF resulting image. *
******************************************************************************/
static void SaveGif(GifByteType *OutputBuffer,
ColorMapObject *OutputColorMap,
int ExpColorMapSize, int Width, int Height)
{
int i;
GifFileType *GifFile;
GifByteType *Ptr = OutputBuffer + Width * (Height - 1);
/* Open stdout for the output file: */
if ((GifFile = EGifOpenFileHandle(1)) == NULL)
QuitGifError(GifFile);
if (EGifPutScreenDesc(GifFile,
Width, Height, ExpColorMapSize, 0,
OutputColorMap) == GIF_ERROR ||
EGifPutImageDesc(GifFile,
0, 0, Width, Height, FALSE, NULL) ==
GIF_ERROR)
QuitGifError(GifFile);
GifQprintf("\n%s: Image 1 at (%d, %d) [%dx%d]: ",
PROGRAM_NAME, GifFile->Image.Left, GifFile->Image.Top,
GifFile->Image.Width, GifFile->Image.Height);
for (i = 0; i < Height; i++) {
if (EGifPutLine(GifFile, Ptr, Width) == GIF_ERROR)
QuitGifError(GifFile);
GifQprintf("\b\b\b\b%-4d", Height - i - 1);
Ptr -= Width;
}
if (EGifCloseFile(GifFile) == GIF_ERROR)
QuitGifError(GifFile);
}
/******************************************************************************
* Close output file (if open), and exit. *
******************************************************************************/
static void QuitGifError(GifFileType *GifFile)
{
PrintGifError();
if (GifFile != NULL) EGifCloseFile(GifFile);
exit(EXIT_FAILURE);
}
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