/****************************************************************************** * 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 * ******************************************************************************* * History: * * 14 Jun 89 - Version 1.0 by Gershon Elber. * * 3 Sep 90 - Version 1.1 by Gershon Elber (Support for Gif89, Unique names). * ******************************************************************************/ #ifndef GIF_LIB_H #define GIF_LIB_H #define GIF_LIB_VERSION " Version 1.2, " #define GIF_ERROR 0 #define GIF_OK 1 #ifndef TRUE #define TRUE 1 #define FALSE 0 #endif #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; /* Note entries prefixed with S are of Screen information, while entries */ /* prefixed with I are of the current defined Image. */ typedef struct GifFileType { int SWidth, SHeight, /* Screen dimensions. */ SColorResolution, SBitsPerPixel, /* How many colors can we generate? */ SBackGroundColor, /* I hope you understand this one... */ ILeft, ITop, IWidth, IHeight, /* Current image dimensions. */ IInterlace, /* Sequential/Interlaced lines. */ IBitsPerPixel; /* How many colors this image has? */ GifColorType *SColorMap, *IColorMap; /* NULL if not exists. */ VoidPtr Private; /* The regular user should not mess with this one! */ } 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). * ******************************************************************************/ #ifdef __cplusplus extern "C" { #endif GifFileType *EGifOpenFileName(char *GifFileName, int GifTestExistance); GifFileType *EGifOpenFileHandle(int GifFileHandle); void EGifSetGifVersion(char *Version); int EGifPutScreenDesc(GifFileType *GifFile, int GifWidth, int GifHeight, int GifColorRes, int GifBackGround, int GifBitsPerPixel, GifColorType *GifColorMap); int EGifPutImageDesc(GifFileType *GifFile, int GifLeft, int GifTop, int Width, int GifHeight, int GifInterlace, int GifBitsPerPixel, GifColorType *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); #ifdef __cplusplus } #endif #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). * ******************************************************************************/ #ifdef __cplusplus extern "C" { #endif GifFileType *DGifOpenFileName(char *GifFileName); GifFileType *DGifOpenFileHandle(int GifFileHandle); 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); #ifdef __cplusplus } #endif #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. * ******************************************************************************/ #ifdef __cplusplus extern "C" { #endif int QuantizeBuffer(unsigned int Width, unsigned int Height, int *ColorMapSize, GifByteType *RedInput, GifByteType *GreenInput, GifByteType *BlueInput, GifByteType *OutputBuffer, GifColorType *OutputColorMap); #ifdef __cplusplus } #endif /****************************************************************************** * O.k. here are the routines from GIF_LIB file QPRINTF.C. * ******************************************************************************/ extern int GifQuitePrint; #ifdef __cplusplus extern "C" { #endif #ifdef USE_VARARGS void GifQprintf(); #else void GifQprintf(char *Format, ...); #endif /* USE_VARARGS */ /****************************************************************************** * O.k. here are the routines from GIF_LIB file GIF_ERR.C. * ******************************************************************************/ void PrintGifError(void); int GifLastError(void); /****************************************************************************** * O.k. here are the routines from GIF_LIB file DEV2GIF.C. * ******************************************************************************/ int DumpScreen2Gif(char *FileName, int ReqGraphDriver, int ReqGraphMode1, int ReqGraphMode2, int ReqGraphMode3); #ifdef __cplusplus } #endif #endif /* GIF_LIB_H */