| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 3 | * |
| 4 | * This code is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License version 2 only, as |
| 6 | * published by the Free Software Foundation. Sun designates this |
| 7 | * particular file as subject to the "Classpath" exception as provided |
| 8 | * by Sun in the LICENSE file that accompanied this code. |
| 9 | * |
| 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 13 | * version 2 for more details (a copy is included in the LICENSE file that |
| 14 | * accompanied this code). |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License version |
| 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | * |
| 20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 21 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 22 | * have any questions. |
| 23 | */ |
| 24 | |
| 25 | #ifndef _GIF_LIB_PRIVATE_H |
| 26 | #define _GIF_LIB_PRIVATE_H |
| 27 | |
| 28 | #include "gif_lib.h" |
| 29 | |
| 30 | #define PROGRAM_NAME "LIBUNGIF" |
| 31 | |
| 32 | #ifdef SYSV |
| 33 | #define VersionStr "Gif library module,\t\tEric S. Raymond\n\ |
| 34 | (C) Copyright 1997 Eric S. Raymond\n" |
| 35 | #else |
| 36 | #define VersionStr PROGRAM_NAME " IBMPC " GIF_LIB_VERSION \ |
| 37 | " Eric S. Raymond, " __DATE__ ", " \ |
| 38 | __TIME__ "\n" "(C) Copyright 1997 Eric S. Raymond\n" |
| 39 | #endif /* SYSV */ |
| 40 | |
| 41 | #define LZ_MAX_CODE 4095 /* Biggest code possible in 12 bits. */ |
| 42 | #define LZ_BITS 12 |
| 43 | |
| 44 | #define FLUSH_OUTPUT 4096 /* Impossible code, to signal flush. */ |
| 45 | #define FIRST_CODE 4097 /* Impossible code, to signal first. */ |
| 46 | #define NO_SUCH_CODE 4098 /* Impossible code, to signal empty. */ |
| 47 | |
| 48 | #define FILE_STATE_WRITE 0x01 |
| 49 | #define FILE_STATE_SCREEN 0x02 |
| 50 | #define FILE_STATE_IMAGE 0x04 |
| 51 | #define FILE_STATE_READ 0x08 |
| 52 | |
| 53 | #define IS_READABLE(Private) (Private->FileState & FILE_STATE_READ) |
| 54 | #define IS_WRITEABLE(Private) (Private->FileState & FILE_STATE_WRITE) |
| 55 | |
| 56 | typedef struct GifFilePrivateType { |
| 57 | int FileState, FileHandle, /* Where all this data goes to! */ |
| 58 | BitsPerPixel, /* Bits per pixel (Codes uses at least this + 1). */ |
| 59 | ClearCode, /* The CLEAR LZ code. */ |
| 60 | EOFCode, /* The EOF LZ code. */ |
| 61 | RunningCode, /* The next code algorithm can generate. */ |
| 62 | RunningBits, /* The number of bits required to represent RunningCode. */ |
| 63 | MaxCode1, /* 1 bigger than max. possible code, in RunningBits bits. */ |
| 64 | LastCode, /* The code before the current code. */ |
| 65 | CrntCode, /* Current algorithm code. */ |
| 66 | StackPtr, /* For character stack (see below). */ |
| 67 | CrntShiftState; /* Number of bits in CrntShiftDWord. */ |
| 68 | unsigned long CrntShiftDWord; /* For bytes decomposition into codes. */ |
| 69 | unsigned long PixelCount; /* Number of pixels in image. */ |
| 70 | FILE *File; /* File as stream. */ |
| 71 | InputFunc Read; /* function to read gif input (TVT) */ |
| 72 | OutputFunc Write; /* function to write gif output (MRB) */ |
| 73 | GifByteType Buf[256]; /* Compressed input is buffered here. */ |
| 74 | GifByteType Stack[LZ_MAX_CODE]; /* Decoded pixels are stacked here. */ |
| 75 | GifByteType Suffix[LZ_MAX_CODE + 1]; /* So we can trace the codes. */ |
| 76 | unsigned int Prefix[LZ_MAX_CODE + 1]; |
| 77 | } GifFilePrivateType; |
| 78 | |
| 79 | extern int _GifError; |
| 80 | |
| 81 | #endif /* _GIF_LIB_PRIVATE_H */ |