www.pudn.com > giflib12.zip > GIF2IRIS.C

/***************************************************************************** 
*   "Gif-Lib" - Yet another gif library.				     * 
*									     * 
* Written by:  Gershon Elber			UNIX Ver 0.1,	Jul. 1989    * 
****************************************************************************** 
* Program to display GIF file under X11 window system.			     * 
* Options:								     * 
* -q : quite printing mode.						     * 
* -f : force the process to be in foreground.				     * 
* -p PosX PosY : defines the position where to put the image.		     * 
* -h : on line help.							     * 
****************************************************************************** 
* History:								     * 
* 13 mar 90 - Version 1.0 by Gershon Elber.				     * 
*****************************************************************************/ 
 
#ifdef __MSDOS__ 
#include  
#include  
#include  
#include  
#include  
#include  
#endif /* __MSDOS__ */ 
 
#include "gl.h" 
#include "device.h" 
 
#include  
#include  
#include  
#include  
#include "gif_lib.h" 
#include "getarg.h" 
 
#define PROGRAM_NAME	"Gif2Iris" 
 
#define ABS(x)		((x) > 0 ? (x) : (-(x))) 
 
#ifdef __MSDOS__ 
extern unsigned int 
    _stklen = 16384;			     /* Increase default stack size. */ 
#endif /* __MSDOS__ */ 
#ifdef SYSV 
static char *VersionStr = 
        "Gif library module,\t\tGershon Elber\n\ 
	(C) Copyright 1989 Gershon Elber, Non commercial use only.\n"; 
static char 
    *CtrlStr = "Gif2Iris q%- f%- p%-PosX|PosY!d!d h%- GifFile!*s"; 
#else 
static char 
    *VersionStr = 
	PROGRAM_NAME 
	GIF_LIB_VERSION 
	"	Gershon Elber,	" 
	__DATE__ ",   " __TIME__ "\n" 
	"(C) Copyright 1989 Gershon Elber, Non commercial use only.\n"; 
static char 
    *CtrlStr = 
	PROGRAM_NAME 
	" q%- f%- p%-PosX|PosY!d!d h%- GifFile!*s"; 
#endif /* SYSV */ 
 
/* Make some variables global, so we could access them faster: */ 
static int 
    PosFlag = FALSE, 
    HelpFlag = FALSE, 
    ForeGroundFlag = FALSE, 
    ColorMapSize = 0, 
    BackGround = 0, 
    IrisPosX = 0, 
    IrisPosY = 0, 
    InterlacedOffset[] = { 0, 4, 2, 1 }, /* The way Interlaced image should. */ 
    InterlacedJumps[] = { 8, 8, 4, 2 };    /* be read - offsets and jumps... */ 
static GifColorType 
    *ColorMap; 
 
static void Screen2Iris(GifRowType *ScreenBuffer, 
			int ScreenWidth, int ScreenHeight); 
 
/****************************************************************************** 
* Interpret the command line and scan the given GIF file.		      * 
******************************************************************************/ 
void main(int argc, char **argv) 
{ 
    int	i, j, Error, NumFiles, ImageNum = 0, Size, Row, Col, Width, Height, 
        ExtCode, Count; 
    GifRecordType RecordType; 
    GifByteType *Extension; 
    char **FileName = NULL; 
    GifRowType *ScreenBuffer; 
    GifFileType *GifFile; 
 
    if ((Error = GAGetArgs(argc, argv, CtrlStr, 
		&GifQuitePrint, &ForeGroundFlag, 
		&PosFlag, &IrisPosX, &IrisPosY, 
		&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(1); 
    } 
 
    if (HelpFlag) { 
	fprintf(stderr, VersionStr); 
	GAPrintHowTo(CtrlStr); 
	exit(0); 
    } 
 
    if (NumFiles == 1) { 
	if ((GifFile = DGifOpenFileName(*FileName)) == NULL) { 
	    PrintGifError(); 
	    exit(-1); 
	} 
    } 
    else { 
	/* Use the stdin instead: */ 
 
#ifdef __MSDOS__ 
	setmode(0, O_BINARY); 
#endif /* __MSDOS__ */ 
	if ((GifFile = DGifOpenFileHandle(0)) == NULL) { 
	    PrintGifError(); 
	    exit(-1); 
	} 
    } 
 
    /* Allocate the screen as vector of column of rows. We cannt allocate    */ 
    /* the all screen at once, as this broken minded CPU can allocate up to  */ 
    /* 64k at a time and our image can be bigger than that:		     */ 
    /* Note this screen is device independent - its the screen as defined by */ 
    /* the GIF file parameters itself.					     */ 
    if ((ScreenBuffer = (GifRowType *) 
	malloc(GifFile -> SHeight * sizeof(GifRowType *))) == NULL) 
	    GIF_EXIT("Failed to allocate memory required, aborted."); 
 
    Size = GifFile -> SWidth * sizeof(GifPixelType);/* Size in bytes one row.*/ 
    if ((ScreenBuffer[0] = (GifRowType) malloc(Size)) == NULL) /* First row. */ 
	GIF_EXIT("Failed to allocate memory required, aborted."); 
 
    for (i = 0; i < GifFile -> SWidth; i++)  /* Set its color to BackGround. */ 
	ScreenBuffer[0][i] = GifFile -> SBackGroundColor; 
    for (i = 1; i < GifFile -> SHeight; i++) { 
	/* Allocate the other rows, and set their color to background too: */ 
	if ((ScreenBuffer[i] = (GifRowType) malloc(Size)) == NULL) 
	    GIF_EXIT("Failed to allocate memory required, aborted."); 
 
	memcpy(ScreenBuffer[i], ScreenBuffer[0], Size); 
    } 
 
    /* Scan the content of the GIF file and load the image(s) in: */ 
    do { 
	if (DGifGetRecordType(GifFile, &RecordType) == GIF_ERROR) { 
	    PrintGifError(); 
	    exit(-1); 
	} 
	switch (RecordType) { 
	    case IMAGE_DESC_RECORD_TYPE: 
		if (DGifGetImageDesc(GifFile) == GIF_ERROR) { 
		    PrintGifError(); 
		    exit(-1); 
		} 
		Row = GifFile -> ITop; /* Image Position relative to Screen. */ 
		Col = GifFile -> ILeft; 
		Width = GifFile -> IWidth; 
		Height = GifFile -> IHeight; 
		GifQprintf("\n%s: Image %d at (%d, %d) [%dx%d]:     ", 
		    PROGRAM_NAME, ++ImageNum, Col, Row, Width, Height); 
		if (GifFile -> ILeft + GifFile -> IWidth > GifFile -> SWidth || 
		   GifFile -> ITop + GifFile -> IHeight > GifFile -> SHeight) { 
		    fprintf(stderr, "Image %d is not confined to screen dimension, aborted.\n"); 
		    exit(-2); 
		} 
		if (GifFile -> IInterlace) { 
		    /* Need to perform 4 passes on the images: */ 
		    for (Count = i = 0; i < 4; i++) 
			for (j = Row + InterlacedOffset[i]; j < Row + Height; 
						 j += InterlacedJumps[i]) { 
			    GifQprintf("\b\b\b\b%-4d", Count++); 
			    if (DGifGetLine(GifFile, &ScreenBuffer[j][Col], 
				Width) == GIF_ERROR) { 
				PrintGifError(); 
				exit(-1); 
			    } 
			} 
		} 
		else { 
		    for (i = 0; i < Height; i++) { 
			GifQprintf("\b\b\b\b%-4d", i); 
			if (DGifGetLine(GifFile, &ScreenBuffer[Row++][Col], 
				Width) == GIF_ERROR) { 
			    PrintGifError(); 
			    exit(-1); 
			} 
		    } 
		} 
		break; 
	    case EXTENSION_RECORD_TYPE: 
		/* Skip any extension blocks in file: */ 
		if (DGifGetExtension(GifFile, &ExtCode, &Extension) == GIF_ERROR) { 
		    PrintGifError(); 
		    exit(-1); 
		} 
		while (Extension != NULL) { 
		    if (DGifGetExtensionNext(GifFile, &Extension) == GIF_ERROR) { 
			PrintGifError(); 
			exit(-1); 
		    } 
		} 
		break; 
	    case TERMINATE_RECORD_TYPE: 
		break; 
	    default:		    /* Should be traps by DGifGetRecordType. */ 
		break; 
	} 
    } 
    while (RecordType != TERMINATE_RECORD_TYPE); 
 
    /* Lets display it - set the global variables required and do it: */ 
    BackGround = GifFile -> SBackGroundColor; 
    ColorMap = (GifFile -> IColorMap ? GifFile -> IColorMap : 
				       GifFile -> SColorMap); 
    ColorMapSize = 1 << (GifFile -> IColorMap ? GifFile -> IBitsPerPixel : 
				                GifFile -> SBitsPerPixel); 
    GifQprintf("\n"); 
    Screen2Iris(ScreenBuffer, GifFile -> SWidth, GifFile -> SHeight); 
 
    if (DGifCloseFile(GifFile) == GIF_ERROR) { 
	PrintGifError(); 
	exit(-1); 
    } 
} 
 
/****************************************************************************** 
* The real display routine.						      * 
******************************************************************************/ 
static void Screen2Iris(GifRowType *ScreenBuffer, 
			int ScreenWidth, int ScreenHeight) 
{ 
    short Val; 
    int i, j; 
    unsigned long *IrisScreenBuffer, *PBuffer; 
 
    if (ScreenWidth > XMAXSCREEN + 1 || 
	ScreenHeight > YMAXSCREEN + 1) 
	GIF_EXIT("Input image is too big."); 
 
    if (PosFlag) 
	prefposition(IrisPosX, IrisPosX + ScreenWidth - 1, 
		     IrisPosY, IrisPosY + ScreenHeight - 1); 
    else 
	prefsize(ScreenWidth, ScreenHeight); 
    if (ForeGroundFlag) 
	foreground(); 
 
    winopen(PROGRAM_NAME); 
    RGBmode(); 
    gconfig(); 
    if ((IrisScreenBuffer = (unsigned long *) 
	 malloc(ScreenWidth * ScreenHeight * sizeof(unsigned long))) == NULL) 
	GIF_EXIT("Failed to allocate memory required, aborted."); 
 
    PBuffer = IrisScreenBuffer; 
    for (i = ScreenHeight - 1; i >= 0; i--) 
	for (j = 0; j < ScreenWidth; j++) 
	    *PBuffer++ = ColorMap[ScreenBuffer[i][j]].Red + 
		         (ColorMap[ScreenBuffer[i][j]].Green << 8) + 
		         (ColorMap[ScreenBuffer[i][j]].Blue << 16); 
 
    reshapeviewport(); 
    lrectwrite(0, 0, ScreenWidth - 1, ScreenHeight - 1, IrisScreenBuffer); 
 
    while (TRUE) { 
	if (qread(&Val) == REDRAW) { 
	    reshapeviewport(); 
	    lrectwrite(0, 0, ScreenWidth - 1, ScreenHeight - 1, 
		                                       IrisScreenBuffer); 
	} 
    } 
}