--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gif_lib.h	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,284 @@
+/* Synched up with: Not in FSF. */
+
+/******************************************************************************
+* In order to make life a little bit easier when using the GIF file format,   *
+* this library was written, and which does all the dirty work...	      *
+*									      *
+*					Written by Gershon Elber,  Jun. 1989  *
+*					Hacks by Eric S. Raymond,  Sep. 1992  *
+*******************************************************************************
+* History:								      *
+* 14 Jun 89 - Version 1.0 by Gershon Elber.				      *
+*  3 Sep 90 - Version 1.1 by Gershon Elber (Support for Gif89, Unique names). *
+* 15 Sep 90 - Version 2.0 by Eric S. Raymond (Changes to suoport GIF slurp)   *
+******************************************************************************/
+
+#ifndef GIF_LIB_H
+#define GIF_LIB_H
+
+#define GIF_LIB_VERSION	" Version 2.0, "
+
+#define	GIF_ERROR	0
+#define GIF_OK		1
+
+#ifndef TRUE
+#define TRUE		1
+#define FALSE		0
+#endif
+
+#ifndef NULL
+#define NULL		0
+#endif /* NULL */
+
+#define GIF_FILE_BUFFER_SIZE 16384  /* Files uses bigger buffers than usual. */
+
+typedef	int		GifBooleanType;
+typedef	unsigned char	GifPixelType;
+typedef unsigned char *	GifRowType;
+typedef unsigned char	GifByteType;
+
+#define GIF_MESSAGE(Msg) fprintf(stderr, "\n%s: %s\n", PROGRAM_NAME, Msg)
+#define GIF_EXIT(Msg)	{ GIF_MESSAGE(Msg); exit(-3); }
+
+#ifdef SYSV
+#define VoidPtr char *
+#else
+#define VoidPtr void *
+#endif /* SYSV */
+
+typedef struct GifColorType {
+    GifByteType Red, Green, Blue;
+} GifColorType;
+
+typedef struct ColorMapObject
+{
+    int	ColorCount;
+    int BitsPerPixel;
+    GifColorType *Colors;		/* on malloc(3) heap */
+}
+ColorMapObject;
+
+typedef struct GifImageDesc {
+    int Left, Top, Width, Height,	/* Current image dimensions. */
+	Interlace;			/* Sequential/Interlaced lines. */
+    ColorMapObject *ColorMap;		/* The local color map */
+} GifImageDesc;
+
+typedef struct GifFileType {
+    int SWidth, SHeight,		/* Screen dimensions. */
+	SColorResolution, 		/* How many colors can we generate? */
+	SBackGroundColor;		/* I hope you understand this one... */
+    ColorMapObject *SColorMap;		/* NULL if not exists. */
+    int ImageCount;			/* Number of current image */
+    GifImageDesc Image;			/* Block describing current image */
+    struct SavedImage *SavedImages;	/* Use this to accumulate file state */
+    VoidPtr Private;	  		/* Don't mess with this! */
+} GifFileType;
+
+typedef enum {
+    UNDEFINED_RECORD_TYPE,
+    SCREEN_DESC_RECORD_TYPE,
+    IMAGE_DESC_RECORD_TYPE,		/* Begin with ',' */
+    EXTENSION_RECORD_TYPE,		/* Begin with '!' */
+    TERMINATE_RECORD_TYPE		/* Begin with ';' */
+} GifRecordType;
+
+/* DumpScreen2Gif routine constants identify type of window/screen to dump.  */
+/* Note all values below 1000 are reserved for the IBMPC different display   */
+/* devices (it has many!) and are compatible with the numbering TC2.0        */
+/* (Turbo C 2.0 compiler for IBM PC) gives to these devices.		     */
+typedef enum {
+    GIF_DUMP_SGI_WINDOW = 1000,
+    GIF_DUMP_X_WINDOW = 1001
+} GifScreenDumpType;
+
+/******************************************************************************
+* O.K., here are the routines one can access in order to encode GIF file:     *
+* (GIF_LIB file EGIF_LIB.C).						      *
+******************************************************************************/
+
+GifFileType *EGifOpenFileName(char *GifFileName, int GifTestExistance);
+GifFileType *EGifOpenFileHandle(int GifFileHandle);
+int EGifSpew(GifFileType *GifFile);
+void EGifSetGifVersion(char *Version);
+int EGifPutScreenDesc(GifFileType *GifFile,
+	int GifWidth, int GifHeight, int GifColorRes, int GifBackGround,
+	ColorMapObject *GifColorMap);
+int EGifPutImageDesc(GifFileType *GifFile,
+	int GifLeft, int GifTop, int Width, int GifHeight, int GifInterlace,
+	ColorMapObject *GifColorMap);
+int EGifPutLine(GifFileType *GifFile, GifPixelType *GifLine, int GifLineLen);
+int EGifPutPixel(GifFileType *GifFile, GifPixelType GifPixel);
+int EGifPutComment(GifFileType *GifFile, char *GifComment);
+int EGifPutExtension(GifFileType *GifFile, int GifExtCode, int GifExtLen,
+							VoidPtr GifExtension);
+int EGifPutCode(GifFileType *GifFile, int GifCodeSize,
+						   GifByteType *GifCodeBlock);
+int EGifPutCodeNext(GifFileType *GifFile, GifByteType *GifCodeBlock);
+int EGifCloseFile(GifFileType *GifFile);
+
+#define	E_GIF_ERR_OPEN_FAILED	1		/* And EGif possible errors. */
+#define	E_GIF_ERR_WRITE_FAILED	2
+#define E_GIF_ERR_HAS_SCRN_DSCR	3
+#define E_GIF_ERR_HAS_IMAG_DSCR	4
+#define E_GIF_ERR_NO_COLOR_MAP	5
+#define E_GIF_ERR_DATA_TOO_BIG	6
+#define E_GIF_ERR_NOT_ENOUGH_MEM 7
+#define E_GIF_ERR_DISK_IS_FULL	8
+#define E_GIF_ERR_CLOSE_FAILED	9
+#define E_GIF_ERR_NOT_WRITEABLE	10
+
+/******************************************************************************
+* O.K., here are the routines one can access in order to decode GIF file:     *
+* (GIF_LIB file DGIF_LIB.C).						      *
+******************************************************************************/
+
+GifFileType *DGifOpenFileName(const char *GifFileName);
+GifFileType *DGifOpenFileHandle(int GifFileHandle);
+int DGifSlurp(GifFileType *GifFile);
+int DGifGetScreenDesc(GifFileType *GifFile);
+int DGifGetRecordType(GifFileType *GifFile, GifRecordType *GifType);
+int DGifGetImageDesc(GifFileType *GifFile);
+int DGifGetLine(GifFileType *GifFile, GifPixelType *GifLine, int GifLineLen);
+int DGifGetPixel(GifFileType *GifFile, GifPixelType GifPixel);
+int DGifGetComment(GifFileType *GifFile, char *GifComment);
+int DGifGetExtension(GifFileType *GifFile, int *GifExtCode,
+						GifByteType **GifExtension);
+int DGifGetExtensionNext(GifFileType *GifFile, GifByteType **GifExtension);
+int DGifGetCode(GifFileType *GifFile, int *GifCodeSize,
+						GifByteType **GifCodeBlock);
+int DGifGetCodeNext(GifFileType *GifFile, GifByteType **GifCodeBlock);
+int DGifGetLZCodes(GifFileType *GifFile, int *GifCode);
+int DGifCloseFile(GifFileType *GifFile);
+
+#define	D_GIF_ERR_OPEN_FAILED	101		/* And DGif possible errors. */
+#define	D_GIF_ERR_READ_FAILED	102
+#define	D_GIF_ERR_NOT_GIF_FILE	103
+#define D_GIF_ERR_NO_SCRN_DSCR	104
+#define D_GIF_ERR_NO_IMAG_DSCR	105
+#define D_GIF_ERR_NO_COLOR_MAP	106
+#define D_GIF_ERR_WRONG_RECORD	107
+#define D_GIF_ERR_DATA_TOO_BIG	108
+#define D_GIF_ERR_NOT_ENOUGH_MEM 109
+#define D_GIF_ERR_CLOSE_FAILED	110
+#define D_GIF_ERR_NOT_READABLE	111
+#define D_GIF_ERR_IMAGE_DEFECT	112
+#define D_GIF_ERR_EOF_TOO_SOON	113
+
+/******************************************************************************
+* O.K., here are the routines from GIF_LIB file QUANTIZE.C.		      *
+******************************************************************************/
+int QuantizeBuffer(unsigned int Width, unsigned int Height, int *ColorMapSize,
+	GifByteType *RedInput, GifByteType *GreenInput, GifByteType *BlueInput,
+	GifByteType *OutputBuffer, GifColorType *OutputColorMap);
+
+
+/******************************************************************************
+* O.K., here are the routines from GIF_LIB file QPRINTF.C.		      *
+******************************************************************************/
+extern int GifQuietPrint;
+
+#ifdef USE_VARARGS
+extern void GifQprintf();
+#else
+extern void GifQprintf(char *Format, ...);
+#endif /* USE_VARARGS */
+
+/******************************************************************************
+* O.K., here are the routines from GIF_LIB file GIF_ERR.C.		      *
+******************************************************************************/
+#ifdef emacs
+extern CONST char *EmacsPrintGifError(void);
+#else
+extern void PrintGifError(void);
+#endif
+extern int GifLastError(void);
+
+/******************************************************************************
+* O.K., here are the routines from GIF_LIB file DEV2GIF.C.		      *
+******************************************************************************/
+extern int DumpScreen2Gif(char *FileName,
+			  int ReqGraphDriver,
+			  int ReqGraphMode1,
+			  int ReqGraphMode2,
+			  int ReqGraphMode3);
+
+/*****************************************************************************
+ *
+ * Everything below this point is new after version 1.2, supporting `slurp
+ * mode' for doing I/O in two big belts with all the image-bashing in core.
+ *
+ *****************************************************************************/
+
+/******************************************************************************
+* Color Map handling from ALLOCGIF.C					      *
+******************************************************************************/
+
+extern ColorMapObject *MakeMapObject(int ColorCount, GifColorType *ColorMap);
+extern void FreeMapObject(ColorMapObject *Objet);
+extern ColorMapObject *UnionColorMap(ColorMapObject *ColorIn1,
+			      ColorMapObject *ColorIn2,
+			      GifPixelType ColorTransIn2[]);
+extern int BitSize(int n);
+
+/******************************************************************************
+* Support for the in-core structures allocation (slurp mode).		      *
+******************************************************************************/
+
+/* This is the in-core version of an extension record */
+typedef struct {
+    int		ByteCount;
+    GifByteType	*Bytes;		/* on malloc(3) heap */
+} ExtensionBlock;
+
+/* This holds an image header, its unpacked raster bits, and extensions */
+typedef struct SavedImage {
+    GifImageDesc	ImageDesc;
+
+    GifPixelType	*RasterBits;		/* on malloc(3) heap */
+
+    int			Function;
+    int			ExtensionBlockCount;
+    ExtensionBlock	*ExtensionBlocks;	/* on malloc(3) heap */
+} SavedImage;
+
+extern void ApplyTranslation(SavedImage *Image, GifPixelType Translation[]);
+
+extern void MakeExtension(SavedImage *New, int Function);
+extern int AddExtensionBlock(SavedImage *New, int Len, char ExtData[]);
+extern void FreeExtension(SavedImage *Image);
+
+extern SavedImage *MakeSavedImage(GifFileType *GifFile, SavedImage *CopyFrom);
+extern void FreeSavedImages(GifFileType *GifFile);
+
+/******************************************************************************
+* The library's internal utility font					      *
+******************************************************************************/
+
+#define GIF_FONT_WIDTH	8
+#define GIF_FONT_HEIGHT	8
+extern unsigned char AsciiTable[][GIF_FONT_WIDTH];
+
+extern void DrawText(SavedImage *Image,
+		     const int x, const int y,
+		     const char *legend,
+		     const int color);
+
+extern void DrawBox(SavedImage *Image,
+		     const int x, const int y,
+		     const int w, const int d,
+		     const int color);
+
+void DrawRectangle(SavedImage *Image,
+		     const int x, const int y,
+		     const int w, const int d,
+		     const int color);
+
+extern void DrawBoxedText(SavedImage *Image,
+		     const int x, const int y,
+		     const char *legend,
+		     const int border,
+		     const int bg,
+		     const int fg);
+
+#endif /* GIF_LIB_H */