208 lines
7.5 KiB
C
208 lines
7.5 KiB
C
/******************************************************************************
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* In order to make life a little bit easier when using the GIF file format, *
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* this library was written, and which does all the dirty work... *
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* *
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* Written by Gershon Elber, Jun. 1989 *
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*******************************************************************************
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* History: *
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* 14 Jun 89 - Version 1.0 by Gershon Elber. *
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* 3 Sep 90 - Version 1.1 by Gershon Elber (Support for Gif89, Unique names). *
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******************************************************************************/
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#ifndef GIF_LIB_H
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#define GIF_LIB_H
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#define GIF_LIB_VERSION " Version 1.2, "
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#define GIF_ERROR 0
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#define GIF_OK 1
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#ifndef TRUE
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#define TRUE 1
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#define FALSE 0
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#endif
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#define GIF_FILE_BUFFER_SIZE 16384 /* Files uses bigger buffers than usual. */
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typedef int GifBooleanType;
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typedef unsigned char GifPixelType;
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typedef unsigned char * GifRowType;
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typedef unsigned char GifByteType;
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#define GIF_MESSAGE(Msg) fprintf(stderr, "\n%s: %s\n", PROGRAM_NAME, Msg)
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#define GIF_EXIT(Msg) { GIF_MESSAGE(Msg); exit(-3); }
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#ifdef SYSV
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#define VoidPtr char *
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#else
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#define VoidPtr void *
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#endif /* SYSV */
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typedef struct GifColorType {
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GifByteType Red, Green, Blue;
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} GifColorType;
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/* Note entries prefixed with S are of Screen information, while entries */
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/* prefixed with I are of the current defined Image. */
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typedef struct GifFileType {
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int SWidth, SHeight, /* Screen dimensions. */
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SColorResolution, SBitsPerPixel, /* How many colors can we generate? */
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SBackGroundColor, /* I hope you understand this one... */
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ILeft, ITop, IWidth, IHeight, /* Current image dimensions. */
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IInterlace, /* Sequential/Interlaced lines. */
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IBitsPerPixel; /* How many colors this image has? */
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GifColorType *SColorMap, *IColorMap; /* NULL if not exists. */
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VoidPtr Private; /* The regular user should not mess with this one! */
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} GifFileType;
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typedef enum {
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UNDEFINED_RECORD_TYPE,
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SCREEN_DESC_RECORD_TYPE,
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IMAGE_DESC_RECORD_TYPE, /* Begin with ',' */
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EXTENSION_RECORD_TYPE, /* Begin with '!' */
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TERMINATE_RECORD_TYPE /* Begin with ';' */
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} GifRecordType;
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/* DumpScreen2Gif routine constants identify type of window/screen to dump. */
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/* Note all values below 1000 are reserved for the IBMPC different display */
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/* devices (it has many!) and are compatible with the numbering TC2.0 */
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/* (Turbo C 2.0 compiler for IBM PC) gives to these devices. */
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typedef enum {
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GIF_DUMP_SGI_WINDOW = 1000,
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GIF_DUMP_X_WINDOW = 1001
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} GifScreenDumpType;
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/******************************************************************************
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* O.k. here are the routines one can access in order to encode GIF file: *
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* (GIF_LIB file EGIF_LIB.C). *
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******************************************************************************/
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#ifdef __cplusplus
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extern "C" {
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#endif
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GifFileType *EGifOpenFileName(char *GifFileName, int GifTestExistance);
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GifFileType *EGifOpenFileHandle(int GifFileHandle);
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void EGifSetGifVersion(char *Version);
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int EGifPutScreenDesc(GifFileType *GifFile,
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int GifWidth, int GifHeight, int GifColorRes, int GifBackGround,
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int GifBitsPerPixel, GifColorType *GifColorMap);
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int EGifPutImageDesc(GifFileType *GifFile,
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int GifLeft, int GifTop, int Width, int GifHeight, int GifInterlace,
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int GifBitsPerPixel, GifColorType *GifColorMap);
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int EGifPutLine(GifFileType *GifFile, GifPixelType *GifLine, int GifLineLen);
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int EGifPutPixel(GifFileType *GifFile, GifPixelType GifPixel);
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int EGifPutComment(GifFileType *GifFile, char *GifComment);
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int EGifPutExtension(GifFileType *GifFile, int GifExtCode, int GifExtLen,
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VoidPtr GifExtension);
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int EGifPutCode(GifFileType *GifFile, int GifCodeSize,
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GifByteType *GifCodeBlock);
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int EGifPutCodeNext(GifFileType *GifFile, GifByteType *GifCodeBlock);
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int EGifCloseFile(GifFileType *GifFile);
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#ifdef __cplusplus
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}
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#endif
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#define E_GIF_ERR_OPEN_FAILED 1 /* And EGif possible errors. */
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#define E_GIF_ERR_WRITE_FAILED 2
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#define E_GIF_ERR_HAS_SCRN_DSCR 3
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#define E_GIF_ERR_HAS_IMAG_DSCR 4
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#define E_GIF_ERR_NO_COLOR_MAP 5
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#define E_GIF_ERR_DATA_TOO_BIG 6
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#define E_GIF_ERR_NOT_ENOUGH_MEM 7
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#define E_GIF_ERR_DISK_IS_FULL 8
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#define E_GIF_ERR_CLOSE_FAILED 9
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#define E_GIF_ERR_NOT_WRITEABLE 10
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/******************************************************************************
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* O.k. here are the routines one can access in order to decode GIF file: *
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* (GIF_LIB file DGIF_LIB.C). *
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******************************************************************************/
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#ifdef __cplusplus
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extern "C" {
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#endif
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GifFileType *DGifOpenFileName(char *GifFileName);
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GifFileType *DGifOpenFileHandle(int GifFileHandle);
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int DGifGetScreenDesc(GifFileType *GifFile);
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int DGifGetRecordType(GifFileType *GifFile, GifRecordType *GifType);
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int DGifGetImageDesc(GifFileType *GifFile);
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int DGifGetLine(GifFileType *GifFile, GifPixelType *GifLine, int GifLineLen);
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int DGifGetPixel(GifFileType *GifFile, GifPixelType GifPixel);
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int DGifGetComment(GifFileType *GifFile, char *GifComment);
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int DGifGetExtension(GifFileType *GifFile, int *GifExtCode,
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GifByteType **GifExtension);
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int DGifGetExtensionNext(GifFileType *GifFile, GifByteType **GifExtension);
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int DGifGetCode(GifFileType *GifFile, int *GifCodeSize,
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GifByteType **GifCodeBlock);
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int DGifGetCodeNext(GifFileType *GifFile, GifByteType **GifCodeBlock);
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int DGifGetLZCodes(GifFileType *GifFile, int *GifCode);
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int DGifCloseFile(GifFileType *GifFile);
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#ifdef __cplusplus
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}
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#endif
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#define D_GIF_ERR_OPEN_FAILED 101 /* And DGif possible errors. */
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#define D_GIF_ERR_READ_FAILED 102
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#define D_GIF_ERR_NOT_GIF_FILE 103
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#define D_GIF_ERR_NO_SCRN_DSCR 104
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#define D_GIF_ERR_NO_IMAG_DSCR 105
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#define D_GIF_ERR_NO_COLOR_MAP 106
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#define D_GIF_ERR_WRONG_RECORD 107
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#define D_GIF_ERR_DATA_TOO_BIG 108
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#define D_GIF_ERR_NOT_ENOUGH_MEM 109
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#define D_GIF_ERR_CLOSE_FAILED 110
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#define D_GIF_ERR_NOT_READABLE 111
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#define D_GIF_ERR_IMAGE_DEFECT 112
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#define D_GIF_ERR_EOF_TOO_SOON 113
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/******************************************************************************
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* O.k. here are the routines from GIF_LIB file QUANTIZE.C. *
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******************************************************************************/
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#ifdef __cplusplus
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extern "C" {
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#endif
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int QuantizeBuffer(unsigned int Width, unsigned int Height, int *ColorMapSize,
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GifByteType *RedInput, GifByteType *GreenInput, GifByteType *BlueInput,
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GifByteType *OutputBuffer, GifColorType *OutputColorMap);
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#ifdef __cplusplus
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}
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#endif
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/******************************************************************************
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* O.k. here are the routines from GIF_LIB file QPRINTF.C. *
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******************************************************************************/
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extern int GifQuitePrint;
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef USE_VARARGS
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void GifQprintf();
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#else
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void GifQprintf(char *Format, ...);
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#endif /* USE_VARARGS */
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/******************************************************************************
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* O.k. here are the routines from GIF_LIB file GIF_ERR.C. *
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******************************************************************************/
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void PrintGifError(void);
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int GifLastError(void);
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/******************************************************************************
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* O.k. here are the routines from GIF_LIB file DEV2GIF.C. *
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******************************************************************************/
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int DumpScreen2Gif(char *FileName, int ReqGraphDriver, int ReqGraphMode1,
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int ReqGraphMode2,
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int ReqGraphMode3);
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#ifdef __cplusplus
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}
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#endif
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#endif /* GIF_LIB_H */
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