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G/UTIL/RLE2GIF.C
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234
G/UTIL/RLE2GIF.C
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/*****************************************************************************
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* "Gif-Lib" - Yet another gif library. *
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* *
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* Written by: Gershon Elber Ver 0.1, Jul. 1989 *
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******************************************************************************
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* Program to convert RLE (utah raster toolkit) file to GIF format. *
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* Options: *
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* -q : quite printing mode. *
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* -c #colors : in power of two, i.e. 7 will allow upto 128 colors in output. *
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* -h : on line help. *
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******************************************************************************
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* History: *
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* 5 Jan 90 - Version 1.0 by Gershon Elber. *
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*****************************************************************************/
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#ifdef __MSDOS__
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#include <graphics.h>
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#include <stdlib.h>
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#include <alloc.h>
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#include <io.h>
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#include <dos.h>
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#include <bios.h>
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#endif /* __MSDOS__ */
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <fcntl.h>
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#include "gif_lib.h"
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#include "getarg.h"
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#include "rle.h" /* The rle tool kit header files. */
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#define PROGRAM_NAME "Rle2Gif"
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#ifdef __MSDOS__
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extern unsigned int
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_stklen = 16384; /* Increase default stack size. */
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#endif /* __MSDOS__ */
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#ifdef SYSV
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static char *VersionStr =
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"Gif library module,\t\tGershon Elber\n\
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(C) Copyright 1989 Gershon Elber, Non commercial use only.\n";
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static char
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*CtrlStr = "Rle2Gif q%- c%-#Colors!d h%- RleFile!*s";
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#else
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static char
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*VersionStr =
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PROGRAM_NAME
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GIF_LIB_VERSION
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" Gershon Elber, "
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__DATE__ ", " __TIME__ "\n"
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"(C) Copyright 1989 Gershon Elber, Non commercial use only.\n";
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static char
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*CtrlStr =
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PROGRAM_NAME
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" q%- c%-#Colors!d h%- RleFile!*s";
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#endif /* SYSV */
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/* Make some variables global, so we could access them faster: */
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static int
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ColorFlag = FALSE,
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ExpNumOfColors = 8,
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HelpFlag = FALSE,
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ColorMapSize = 256;
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static void LoadRle(char *FileName,
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GifByteType **RedBuffer,
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GifByteType **GreenBuffer,
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GifByteType **BlueBuffer,
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int *Width, int *Height);
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static void SaveGif(GifByteType *OutputBuffer,
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GifColorType *OutputColorMap,
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int ExpColorMapSize, int Width, int Height);
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static void QuitGifError(GifFileType *GifFile);
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/******************************************************************************
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* Interpret the command line and scan the given GIF file. *
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******************************************************************************/
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void main(int argc, char **argv)
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{
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int i, j, Error, NumFiles, Width, Height;
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char **FileName = NULL;
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GifByteType *RedBuffer = NULL, *GreenBuffer = NULL, *BlueBuffer = NULL,
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*OutputBuffer = NULL;
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GifColorType *OutputColorMap = NULL;
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if ((Error = GAGetArgs(argc, argv, CtrlStr, &GifQuitePrint,
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&ColorFlag, &ExpNumOfColors, &HelpFlag,
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&NumFiles, &FileName)) != FALSE ||
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(NumFiles > 1 && !HelpFlag)) {
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if (Error)
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GAPrintErrMsg(Error);
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else if (NumFiles > 1)
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GIF_MESSAGE("Error in command line parsing - one GIF file please.");
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GAPrintHowTo(CtrlStr);
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exit(1);
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}
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if (HelpFlag) {
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fprintf(stderr, VersionStr);
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GAPrintHowTo(CtrlStr);
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exit(0);
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}
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ColorMapSize = 1 << ExpNumOfColors;
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if (NumFiles == 1) {
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LoadRle(*FileName,
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&RedBuffer, &GreenBuffer, &BlueBuffer, &Width, &Height);
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}
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else {
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LoadRle(NULL,
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&RedBuffer, &GreenBuffer, &BlueBuffer, &Width, &Height);
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}
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if ((OutputColorMap = (GifColorType *) malloc(ColorMapSize *
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sizeof(GifColorType))) == NULL ||
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(OutputBuffer = (GifByteType *) malloc(Width * Height *
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sizeof(GifByteType))) == NULL)
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GIF_EXIT("Failed to allocate memory required, aborted.");
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if (QuantizeBuffer(Width, Height, &ColorMapSize,
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RedBuffer, GreenBuffer, BlueBuffer,
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OutputBuffer, OutputColorMap) == GIF_ERROR)
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QuitGifError(NULL);
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free((char *) RedBuffer);
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free((char *) GreenBuffer);
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free((char *) BlueBuffer);
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SaveGif(OutputBuffer, OutputColorMap, ExpNumOfColors, Width, Height);
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}
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/******************************************************************************
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* Load RLE file into internal frame buffer. *
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******************************************************************************/
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static void LoadRle(char *FileName,
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GifByteType **RedBuffer,
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GifByteType **GreenBuffer,
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GifByteType **BlueBuffer,
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int *Width, int *Height)
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{
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int i, j, k, Size;
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GifByteType *OutputPtr[3];
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rle_hdr in_hdr;
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rle_pixel **rows, *ptr;
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if (FileName != NULL) {
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if ((in_hdr.rle_file = fopen(FileName, "r")) == NULL)
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GIF_EXIT("Can't open input file name.");
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}
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else
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in_hdr.rle_file = stdin;
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rle_get_setup_ok( &in_hdr, "rle2gif", FileName );
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*Width = in_hdr.xmax - in_hdr.xmin + 1;
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*Height = in_hdr.ymax - in_hdr.ymin + 1;
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if (in_hdr.ncolors != 3)
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GIF_EXIT("Input Rle file does not hold 3 (RGB) colors, aborted.");
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Size = *Width * *Height * sizeof(GifByteType);
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if (rle_row_alloc(&in_hdr, &rows) ||
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(*RedBuffer = (GifByteType *) malloc(Size)) == NULL ||
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(*GreenBuffer = (GifByteType *) malloc(Size)) == NULL ||
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(*BlueBuffer = (GifByteType *) malloc(Size)) == NULL)
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GIF_EXIT("Failed to allocate memory required, aborted.");
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OutputPtr[0] = *RedBuffer;
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OutputPtr[1] = *GreenBuffer;
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OutputPtr[2] = *BlueBuffer;
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for (i = 0; i < *Height; i++) {
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rle_getrow(&in_hdr, rows); /* Get one scan line (3 colors). */
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for (j = 0; j < 3; j++) { /* Copy the 3 colors to the given buffers. */
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ptr = &rows[j][in_hdr.xmin];
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for (k = 0; k < *Width; k++)
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*OutputPtr[j]++ = *ptr++;
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}
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}
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}
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/******************************************************************************
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* Save the GIF resulting image. *
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******************************************************************************/
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static void SaveGif(GifByteType *OutputBuffer,
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GifColorType *OutputColorMap,
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int ExpColorMapSize, int Width, int Height)
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{
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int i;
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GifFileType *GifFile;
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GifByteType *Ptr = OutputBuffer + Width * (Height - 1);
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/* Open stdout for the output file: */
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if ((GifFile = EGifOpenFileHandle(1)) == NULL)
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QuitGifError(GifFile);
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if (EGifPutScreenDesc(GifFile,
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Width, Height, ExpColorMapSize, 0, ExpColorMapSize,
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OutputColorMap) == GIF_ERROR ||
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EGifPutImageDesc(GifFile,
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0, 0, Width, Height, FALSE, ExpColorMapSize, NULL) ==
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GIF_ERROR)
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QuitGifError(GifFile);
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GifQprintf("\n%s: Image 1 at (%d, %d) [%dx%d]: ",
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PROGRAM_NAME, GifFile -> ILeft, GifFile -> ITop,
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GifFile -> IWidth, GifFile -> IHeight);
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for (i = 0; i < Height; i++) {
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if (EGifPutLine(GifFile, Ptr, Width) == GIF_ERROR)
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QuitGifError(GifFile);
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GifQprintf("\b\b\b\b%-4d", Height - i - 1);
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Ptr -= Width;
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}
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if (EGifCloseFile(GifFile) == GIF_ERROR)
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QuitGifError(GifFile);
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}
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/******************************************************************************
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* Close output file (if open), and exit. *
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******************************************************************************/
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static void QuitGifError(GifFileType *GifFile)
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{
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PrintGifError();
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if (GifFile != NULL) EGifCloseFile(GifFile);
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exit(1);
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}
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