| /****************************************************************************** |
| * 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_ 1 |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif /* __cplusplus */ |
| |
| #define GIF_LIB_VERSION " Version 4.1, " |
| |
| #define GIF_ERROR 0 |
| #define GIF_OK 1 |
| |
| #ifndef TRUE |
| #define TRUE 1 |
| #endif /* TRUE */ |
| #ifndef FALSE |
| #define FALSE 0 |
| #endif /* FALSE */ |
| |
| #ifndef NULL |
| #define NULL 0 |
| #endif /* NULL */ |
| |
| #define GIF_STAMP "GIFVER" /* First chars in file - GIF stamp. */ |
| #define GIF_STAMP_LEN sizeof(GIF_STAMP) - 1 |
| #define GIF_VERSION_POS 3 /* Version first character in stamp. */ |
| #define GIF87_STAMP "GIF87a" /* First chars in file - GIF stamp. */ |
| #define GIF89_STAMP "GIF89a" /* First chars in file - GIF stamp. */ |
| |
| #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; |
| #ifdef _GBA_OPTMEM |
| typedef unsigned short GifPrefixType; |
| typedef short GifWord; |
| #else |
| typedef unsigned int GifPrefixType; |
| typedef int GifWord; |
| #endif |
| |
| #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 { |
| GifWord Left, Top, Width, Height, /* Current image dimensions. */ |
| Interlace; /* Sequential/Interlaced lines. */ |
| ColorMapObject *ColorMap; /* The local color map */ |
| } GifImageDesc; |
| |
| typedef struct GifFileType { |
| GifWord 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(const char *GifFileName, |
| int GifTestExistance); |
| GifFileType *EGifOpenFileHandle(int GifFileHandle); |
| GifFileType *EGifOpen(void *userPtr, OutputFunc writeFunc); |
| |
| int EGifSpew(GifFileType * GifFile); |
| void EGifSetGifVersion(const char *Version); |
| int EGifPutScreenDesc(GifFileType * GifFile, |
| int GifWidth, int GifHeight, int GifColorRes, |
| int GifBackGround, |
| const ColorMapObject * GifColorMap); |
| int EGifPutImageDesc(GifFileType * GifFile, int GifLeft, int GifTop, |
| int Width, int GifHeight, int GifInterlace, |
| const ColorMapObject * GifColorMap); |
| int EGifPutLine(GifFileType * GifFile, GifPixelType * GifLine, |
| int GifLineLen); |
| int EGifPutPixel(GifFileType * GifFile, GifPixelType GifPixel); |
| int EGifPutComment(GifFileType * GifFile, const char *GifComment); |
| int EGifPutExtensionFirst(GifFileType * GifFile, int GifExtCode, |
| int GifExtLen, const VoidPtr GifExtension); |
| int EGifPutExtensionNext(GifFileType * GifFile, int GifExtCode, |
| int GifExtLen, const VoidPtr GifExtension); |
| int EGifPutExtensionLast(GifFileType * GifFile, int GifExtCode, |
| int GifExtLen, const VoidPtr GifExtension); |
| int EGifPutExtension(GifFileType * GifFile, int GifExtCode, int GifExtLen, |
| const VoidPtr GifExtension); |
| int EGifPutCode(GifFileType * GifFile, int GifCodeSize, |
| const GifByteType * GifCodeBlock); |
| int EGifPutCodeNext(GifFileType * GifFile, |
| const 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). |
| *****************************************************************************/ |
| #ifndef _GBA_NO_FILEIO |
| GifFileType *DGifOpenFileName(const char *GifFileName); |
| GifFileType *DGifOpenFileHandle(int GifFileHandle); |
| int DGifSlurp(GifFileType * GifFile); |
| #endif /* _GBA_NO_FILEIO */ |
| GifFileType *DGifOpen(void *userPtr, InputFunc readFunc); /* new one |
| * (TVT) */ |
| 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 HAVE_STDARG_H |
| extern void GifQprintf(char *Format, ...); |
| #elif defined (HAVE_VARARGS_H) |
| extern void GifQprintf(); |
| #endif /* HAVE_STDARG_H */ |
| |
| /****************************************************************************** |
| * O.K., here are the routines from GIF_LIB file GIF_ERR.C. |
| ******************************************************************************/ |
| #ifndef _GBA_NO_FILEIO |
| extern void PrintGifError(void); |
| #endif /* _GBA_NO_FILEIO */ |
| extern int GifLastError(void); |
| |
| /****************************************************************************** |
| * O.K., here are the routines from GIF_LIB file DEV2GIF.C. |
| ******************************************************************************/ |
| extern int DumpScreen2Gif(const char *FileName, |
| int ReqGraphDriver, |
| long ReqGraphMode1, |
| long ReqGraphMode2, |
| long 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, |
| const GifColorType * ColorMap); |
| extern void FreeMapObject(ColorMapObject * Object); |
| extern ColorMapObject *UnionColorMap(const ColorMapObject * ColorIn1, |
| const 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; |
| unsigned 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, |
| unsigned char ExtData[]); |
| extern void FreeExtension(SavedImage * Image); |
| extern SavedImage *MakeSavedImage(GifFileType * GifFile, |
| const 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]; |
| |
| #ifdef _WIN32 |
| extern void DrawGifText(SavedImage * Image, |
| #else |
| extern void DrawGifText(SavedImage * Image, |
| #endif |
| 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); |
| |
| #ifdef __cplusplus |
| } |
| #endif /* __cplusplus */ |
| #endif /* _GIF_LIB_H */ |
