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- /******************************************************************************
- * 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) *
- * 26 Jun 96 - Version 3.0 by Eric S. Raymond (Full GIF89 support) *
- * 17 Dec 98 - Version 4.0 by Toshio Kuratomi (Fix extension writing code) *
- ******************************************************************************/
-
- #ifndef GIF_LIB_H
- #define GIF_LIB_H
-
- #define GIF_LIB_VERSION " Version 4.0, "
-
- #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 UserData; /* hook to attach user data (TVT) */
- 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;
-
- /* func type to read gif data from arbitrary sources (TVT) */
- typedef int (*InputFunc)(GifFileType*,GifByteType*,int);
-
- /* func type to write gif data ro arbitrary targets.
- * Returns count of bytes written. (MRB)
- */
- typedef int (*OutputFunc)(GifFileType *, const GifByteType *, int);
- /******************************************************************************
- * GIF89 extension function codes *
- ******************************************************************************/
-
- #define COMMENT_EXT_FUNC_CODE 0xfe /* comment */
- #define GRAPHICS_EXT_FUNC_CODE 0xf9 /* graphics control */
- #define PLAINTEXT_EXT_FUNC_CODE 0x01 /* plaintext */
- #define APPLICATION_EXT_FUNC_CODE 0xff /* application block */
-
- /******************************************************************************
- * 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);
- GifFileType *EgifOpen(void *userPtr, OutputFunc writeFunc);
- 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);
- GifFileType *DGifOpen( void* userPtr, InputFunc readFunc ); /* new one (TVT) */
- 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. *
- ******************************************************************************/
- extern void PrintGifError(void);
- 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 *Object);
- 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;
- char *Bytes; /* on malloc(3) heap */
- int Function; /* Holds the type of the Extension block. */
- } ExtensionBlock;
-
- /* This holds an image header, its unpacked raster bits, and extensions */
- typedef struct SavedImage {
- GifImageDesc ImageDesc;
-
- char *RasterBits; /* on malloc(3) heap */
-
- int Function; /* DEPRECATED: Use ExtensionBlocks[x].Function
- * instead */
- 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 */
-