external/giflib 4.1.6

1 files changed, 486 insertions, 0 deletions

diff --git a/giflib-4.1.6/util/giftext.c b/giflib-4.1.6/util/giftext.c
new file mode 100644
index 0000000..07afff1
--- /dev/null
+++ b/giflib-4.1.6/util/giftext.c
@@ -0,0 +1,486 @@
+/*****************************************************************************
+*   "Gif-Lib" - Yet another gif library.				     *
+*									     *
+* Written by:  Gershon Elber				Ver 0.1, Jun. 1989   *
+******************************************************************************
+* Program to dump GIF file content as TEXT information			     *
+* Options:								     *
+* -q : quiet printing mode.						     *
+* -c : include the color maps as well.					     *
+* -e : include encoded information packed as bytes as well.		     *
+* -z : include encoded information (12bits) codes as result from the zl alg. *
+* -p : dump pixel information instead of encoded information.		     *
+* -r : same as -p but dump one pixel as one byte in binary form with no      *
+*      other information. This will create a file of size Width by Height.   *
+* -h : on-line help.							     *
+******************************************************************************
+* History:								     *
+* 28 Jun 89 - Version 1.0 by Gershon Elber.				     *
+* 21 Dec 89 - Fix segmentation fault problem in PrintCodeBlock (Version 1.1) *
+* 25 Dec 89 - Add the -r flag for raw output.                                *
+*****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#ifdef __MSDOS__
+#include <stdlib.h>
+#include <alloc.h>
+#include <conio.h>
+#include <io.h>
+#endif /* __MSDOS__ */
+
+#ifndef __MSDOS__
+#include <stdlib.h>
+#endif
+#include <stdio.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include "gif_lib.h"
+#include "getarg.h"
+
+#define PROGRAM_NAME	"GifText"
+
+#define MAKE_PRINTABLE(c)  (isprint(c) ? (c) : ' ')
+
+#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 = "GifText q%- c%- e%- z%- p%- r%- h%- GifFile!*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%- e%- z%- p%- r%- h%- GifFile!*s";
+#endif /* SYSV */
+
+static void PrintCodeBlock(GifFileType *GifFile, GifByteType *CodeBlock, int Reset);
+static void PrintPixelBlock(GifByteType *PixelBlock, int Len, int Reset);
+static void PrintExtBlock(GifByteType *Extension, int Reset);
+static void PrintLZCodes(GifFileType *GifFile);
+
+/******************************************************************************
+* Interpret the command line and scan the given GIF file.		      *
+******************************************************************************/
+int main(int argc, char **argv)
+{
+    int i, j, ExtCode, CodeSize, Error, NumFiles, Len,
+	ColorMapFlag = FALSE, EncodedFlag = FALSE, LZCodesFlag = FALSE,
+	PixelFlag = FALSE, HelpFlag = FALSE, RawFlag = FALSE, ImageNum = 1;
+    char *GifFileName, **FileName = NULL;
+    GifPixelType *Line;
+    GifRecordType RecordType;
+    GifByteType *CodeBlock, *Extension;
+    GifFileType *GifFile;
+
+    if ((Error = GAGetArgs(argc, argv, CtrlStr,
+		&GifQuietPrint, &ColorMapFlag, &EncodedFlag,
+		&LZCodesFlag, &PixelFlag, &RawFlag, &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 (NumFiles == 1) {
+	GifFileName = *FileName;
+	if ((GifFile = DGifOpenFileName(*FileName)) == NULL) {
+	    PrintGifError();
+	    exit(EXIT_FAILURE);
+	}
+    }
+    else {
+	/* Use the stdin instead: */
+	GifFileName = "Stdin";
+	if ((GifFile = DGifOpenFileHandle(0)) == NULL) {
+	    PrintGifError();
+	    exit(EXIT_FAILURE);
+	}
+    }
+
+    /* Because we write binary data - make sure no text will be written. */
+    if (RawFlag) {
+	ColorMapFlag = EncodedFlag = LZCodesFlag = PixelFlag = FALSE;
+#ifdef __MSDOS__
+	setmode(1, O_BINARY);             /* Make sure it is in binary mode. */
+#endif /* __MSDOS__ */
+    }
+    else {
+	printf("\n%s:\n\n\tScreen Size - Width = %d, Height = %d.\n",
+	       GifFileName, GifFile->SWidth, GifFile->SHeight);
+	printf("\tColorResolution = %d, BitsPerPixel = %d, BackGround = %d.\n",
+	       GifFile->SColorResolution,
+	       GifFile->SColorMap ? GifFile->SColorMap->BitsPerPixel : 0,
+	       GifFile->SBackGroundColor);
+	if (GifFile->SColorMap)
+	    printf("\tHas Global Color Map.\n\n");
+	else
+	    printf("\tNo Global Color Map.\n\n");
+	if (ColorMapFlag && GifFile->SColorMap) {
+	    printf("\tGlobal Color Map:\n");
+	    Len = GifFile->SColorMap->ColorCount;
+	    for (i = 0; i < Len; i+=4) {
+		for (j = 0; j < 4 && j < Len; j++) {
+		    printf("%3d: %02xh %02xh %02xh   ", i + j,
+			   GifFile->SColorMap->Colors[i + j].Red,
+			   GifFile->SColorMap->Colors[i + j].Green,
+			   GifFile->SColorMap->Colors[i + j].Blue);
+		}
+		printf("\n");
+	    }
+	}
+    }
+
+    do {
+	if (DGifGetRecordType(GifFile, &RecordType) == GIF_ERROR) {
+	    PrintGifError();
+	    exit(EXIT_FAILURE);
+	}
+	switch (RecordType) {
+	    case IMAGE_DESC_RECORD_TYPE:
+		if (DGifGetImageDesc(GifFile) == GIF_ERROR) {
+		    PrintGifError();
+		    exit(EXIT_FAILURE);
+		}
+		if (!RawFlag) {
+		    printf("\nImage #%d:\n\n\tImage Size - Left = %d, Top = %d, Width = %d, Height = %d.\n",
+			   ImageNum++, GifFile->Image.Left, GifFile->Image.Top,
+			   GifFile->Image.Width, GifFile->Image.Height);
+		    printf("\tImage is %s",
+			   GifFile->Image.Interlace ? "Interlaced" :
+						    "Non Interlaced");
+		    if (GifFile->Image.ColorMap != NULL)
+			printf(", BitsPerPixel = %d.\n",
+				GifFile->Image.ColorMap->BitsPerPixel);
+		    else
+			printf(".\n");
+		    if (GifFile->Image.ColorMap)
+			printf("\tImage Has Color Map.\n");
+		    else
+			printf("\tNo Image Color Map.\n");
+		    if (ColorMapFlag && GifFile->Image.ColorMap) {
+			Len = 1 << GifFile->Image.ColorMap->BitsPerPixel;
+			for (i = 0; i < Len; i+=4) {
+			    for (j = 0; j < 4 && j < Len; j++) {
+				printf("%3d: %02xh %02xh %02xh   ", i + j,
+				       GifFile->Image.ColorMap->Colors[i + j].Red,
+				       GifFile->Image.ColorMap->Colors[i + j].Green,
+				       GifFile->Image.ColorMap->Colors[i + j].Blue);
+			    }
+			    printf("\n");
+			}
+		    }
+		}
+
+		if (EncodedFlag) {
+		    if (DGifGetCode(GifFile, &CodeSize, &CodeBlock) == GIF_ERROR) {
+			PrintGifError();
+			exit(EXIT_FAILURE);
+		    }
+		    printf("\nImage LZ compressed Codes (Code Size = %d):\n",
+			   CodeSize);
+		    PrintCodeBlock(GifFile, CodeBlock, TRUE);
+		    while (CodeBlock != NULL) {
+			if (DGifGetCodeNext(GifFile, &CodeBlock) == GIF_ERROR) {
+			    PrintGifError();
+			    exit(EXIT_FAILURE);
+			}
+			PrintCodeBlock(GifFile, CodeBlock, FALSE);
+		    }
+		}
+		else if (LZCodesFlag) {
+		    PrintLZCodes(GifFile);
+		}
+		else if (PixelFlag) {
+		    Line = (GifPixelType *) malloc(GifFile->Image.Width *
+						sizeof(GifPixelType));
+		    for (i = 0; i < GifFile->Image.Height; i++) {
+			if (DGifGetLine(GifFile, Line, GifFile->Image.Width)
+			    == GIF_ERROR) {
+			    PrintGifError();
+			    exit(EXIT_FAILURE);
+			}
+			PrintPixelBlock(Line, GifFile->Image.Width, i == 0);
+		    }
+		    PrintPixelBlock(NULL, GifFile->Image.Width, FALSE);
+		    free((char *) Line);
+		}
+		else if (RawFlag) {
+		    Line = (GifPixelType *) malloc(GifFile->Image.Width *
+						sizeof(GifPixelType));
+		    for (i = 0; i < GifFile->Image.Height; i++) {
+			if (DGifGetLine(GifFile, Line, GifFile->Image.Width)
+			    == GIF_ERROR) {
+			    PrintGifError();
+			    exit(EXIT_FAILURE);
+			}
+			fwrite(Line, 1, GifFile->Image.Width, stdout);
+		    }
+		    free((char *) Line);
+		}
+		else {
+		    /* Skip the image: */
+		    if (DGifGetCode(GifFile, &CodeSize, &CodeBlock) == GIF_ERROR) {
+			PrintGifError();
+			exit(EXIT_FAILURE);
+		    }
+		    while (CodeBlock != NULL) {
+			if (DGifGetCodeNext(GifFile, &CodeBlock) == GIF_ERROR) {
+			    PrintGifError();
+			    exit(EXIT_FAILURE);
+			}
+		    }
+
+		}
+		break;
+	    case EXTENSION_RECORD_TYPE:
+		if (DGifGetExtension(GifFile, &ExtCode, &Extension) == GIF_ERROR) {
+		    PrintGifError();
+		    exit(EXIT_FAILURE);
+		}
+		if (!RawFlag) {
+		    putchar('\n');
+		    switch (ExtCode)
+		    {
+		    case COMMENT_EXT_FUNC_CODE:
+			printf("GIF89 comment");
+			break;
+		    case GRAPHICS_EXT_FUNC_CODE:
+			printf("GIF89 graphics control");
+			break;
+		    case PLAINTEXT_EXT_FUNC_CODE:
+			printf("GIF89 plaintext");
+			break;
+		    case APPLICATION_EXT_FUNC_CODE:
+			printf("GIF89 application block");
+			break;
+		    default:
+			printf("Extension record of unknown type");
+			break;
+		    }
+		    printf(" (Ext Code = %d [%c]):\n",
+			   ExtCode, MAKE_PRINTABLE(ExtCode));
+		    PrintExtBlock(Extension, TRUE);
+		}
+		for (;;) {
+		    if (DGifGetExtensionNext(GifFile, &Extension) == GIF_ERROR) {
+			PrintGifError();
+			exit(EXIT_FAILURE);
+		    }
+		    if (Extension == NULL)
+			break;
+		    PrintExtBlock(Extension, FALSE);
+		}
+		break;
+	    case TERMINATE_RECORD_TYPE:
+		break;
+	    default:		     /* Should be traps by DGifGetRecordType */
+		break;
+	}
+    }
+    while (RecordType != TERMINATE_RECORD_TYPE);
+
+    if (DGifCloseFile(GifFile) == GIF_ERROR) {
+	PrintGifError();
+	exit(EXIT_FAILURE);
+    }
+
+    if (!RawFlag) printf("\nGif file terminated normally.\n");
+
+    return 0;
+}
+
+/******************************************************************************
+* Print the given CodeBlock - a string in pascal notation (size in first      *
+* place). Save local information so printing can be performed continuously,   *
+* or reset to start state if Reset. If CodeBlock is NULL, output is flushed   *
+******************************************************************************/
+static void PrintCodeBlock(GifFileType *GifFile, GifByteType *CodeBlock, int Reset)
+{
+    static int CrntPlace = 0, Print = TRUE;
+    static long CodeCount = 0;
+    int i, Percent, Len;
+    long NumBytes;
+
+    if (Reset || CodeBlock == NULL) {
+	if (CodeBlock == NULL) {
+	    if (CrntPlace > 0) {
+		if (Print) printf("\n");
+		CodeCount += CrntPlace - 16;
+	    }
+	    if (GifFile->Image.ColorMap)
+		NumBytes = ((((long) GifFile->Image.Width) * GifFile->Image.Height)
+				* GifFile->Image.ColorMap->BitsPerPixel) / 8;
+	    else
+		NumBytes = ((((long) GifFile->Image.Width) * GifFile->Image.Height)
+				* GifFile->SColorMap->BitsPerPixel) / 8;
+	    Percent = 100 * CodeCount / NumBytes;
+	    printf("\nCompression ratio: %ld/%ld (%d%%).\n",
+			CodeCount, NumBytes, Percent);
+	    return;
+	}
+	CrntPlace = 0;
+	CodeCount = 0;
+	Print = TRUE;
+    }
+
+    Len = CodeBlock[0];
+    for (i = 1; i <= Len; i++) {
+	if (CrntPlace == 0) {
+	    if (Print) printf("\n%05lxh:  ", CodeCount);
+	    CodeCount += 16;
+	}
+#ifdef __MSDOS__
+	if (kbhit() && ((c = getch()) == 'q' || c == 'Q')) Print = FALSE;
+#endif /* __MSDOS__ */
+	if (Print) printf(" %02xh", CodeBlock[i]);
+	if (++CrntPlace >= 16) CrntPlace = 0;
+    }
+}
+
+/******************************************************************************
+* Print the given Extension - a string in pascal notation (size in first      *
+* place). Save local information so printing can be performed continuously,   *
+* or reset to start state if Reset. If Extension is NULL, output is flushed   *
+******************************************************************************/
+static void PrintExtBlock(GifByteType *Extension, int Reset)
+{
+    static int CrntPlace = 0, Print = TRUE;
+    static long ExtCount = 0;
+    static char HexForm[49], AsciiForm[17];
+    int i, Len;
+
+    if (Reset || Extension == NULL) {
+	if (Extension == NULL) {
+	    if (CrntPlace > 0) {
+		HexForm[CrntPlace * 3] = 0;
+		AsciiForm[CrntPlace] = 0;
+		if (Print) printf("\n%05lx: %-49s  %-17s\n",
+				ExtCount, HexForm, AsciiForm);
+		return;
+	    }
+	    else if (Print)
+		printf("\n");
+	}
+	CrntPlace = 0;
+	ExtCount = 0;
+	Print = TRUE;
+    }
+
+    if (!Print) return;
+
+    Len = Extension[0];
+    for (i = 1; i <= Len; i++) {
+	sprintf(&HexForm[CrntPlace * 3], " %02x", Extension[i]);
+	sprintf(&AsciiForm[CrntPlace], "%c", MAKE_PRINTABLE(Extension[i]));
+#ifdef __MSDOS__
+	if (kbhit() && ((c = getch()) == 'q' || c == 'Q')) Print = FALSE;
+#endif /* __MSDOS__ */
+	if (++CrntPlace == 16) {
+	    HexForm[CrntPlace * 3] = 0;
+	    AsciiForm[CrntPlace] = 0;
+	    if (Print) printf("\n%05lx: %-49s  %-17s",
+				ExtCount, HexForm, AsciiForm);
+	    ExtCount += 16;
+	    CrntPlace = 0;
+	}
+    }
+}
+
+/******************************************************************************
+* Print the given PixelBlock of length Len.				      *
+* Save local information so printing can be performed continuously,           *
+* or reset to start state if Reset. If PixelBlock is NULL, output is flushed  *
+******************************************************************************/
+static void PrintPixelBlock(GifByteType *PixelBlock, int Len, int Reset)
+{
+    static int CrntPlace = 0, Print = TRUE;
+    static long ExtCount = 0;
+    static char HexForm[49], AsciiForm[17];
+    int i;
+
+    if (Reset || PixelBlock == NULL) {
+	if (PixelBlock == NULL) {
+	    if (CrntPlace > 0) {
+		HexForm[CrntPlace * 3] = 0;
+		AsciiForm[CrntPlace] = 0;
+		if (Print) printf("\n%05lx: %-49s  %-17s\n",
+				ExtCount, HexForm, AsciiForm);
+	    }
+	    else if (Print)
+		printf("\n");
+	}
+	CrntPlace = 0;
+	ExtCount = 0;
+	Print = TRUE;
+	if (PixelBlock == NULL) return;
+    }
+
+    if (!Print) return;
+
+    for (i = 0; i < Len; i++) {
+	sprintf(&HexForm[CrntPlace * 3], " %02x", PixelBlock[i]);
+	sprintf(&AsciiForm[CrntPlace], "%c", MAKE_PRINTABLE(PixelBlock[i]));
+#ifdef __MSDOS__
+	if (kbhit() && ((c = getch()) == 'q' || c == 'Q')) Print = FALSE;
+#endif /* __MSDOS__ */
+	if (++CrntPlace == 16) {
+	    HexForm[CrntPlace * 3] = 0;
+	    AsciiForm[CrntPlace] = 0;
+	    if (Print) printf("\n%05lx: %-49s  %-17s",
+				ExtCount, HexForm, AsciiForm);
+	    ExtCount += 16;
+	    CrntPlace = 0;
+	}
+    }
+}
+
+/******************************************************************************
+* Print the image as LZ codes (each 12bits), until EOF marker is reached.     *
+******************************************************************************/
+static void PrintLZCodes(GifFileType *GifFile)
+{
+    int Code, Print = TRUE, CrntPlace = 0;
+    long CodeCount = 0;
+
+    do {
+	if (Print && CrntPlace == 0) printf("\n%05lx:", CodeCount);
+	if (DGifGetLZCodes(GifFile, &Code) == GIF_ERROR) {
+	    PrintGifError();
+	    exit(EXIT_FAILURE);
+	}
+	if (Print && Code >= 0)
+	    printf(" %03x", Code);	      /* EOF Code is returned as -1. */
+	CodeCount++;
+	if (++CrntPlace >= 16) CrntPlace = 0;
+#ifdef __MSDOS__
+	if (kbhit() && ((c = getch()) == 'q' || c == 'Q')) Print = FALSE;
+#endif /* __MSDOS__ */
+    }
+    while (Code >= 0);
+}