Initial community commit

Src/external_dependencies/giflib/gif_lib_private.h

@@ -0,0 +1,59 @@
+/****************************************************************************
+
+gif_lib_private.h - internal giflib routines and structures
+
+****************************************************************************/
+
+#ifndef _GIF_LIB_PRIVATE_H
+#define _GIF_LIB_PRIVATE_H
+
+#include "gif_lib.h"
+#include "gif_hash.h"
+
+#define EXTENSION_INTRODUCER      0x21
+#define DESCRIPTOR_INTRODUCER     0x2c
+#define TERMINATOR_INTRODUCER     0x3b
+
+#define LZ_MAX_CODE         4095    /* Biggest code possible in 12 bits. */
+#define LZ_BITS             12
+
+#define FLUSH_OUTPUT        4096    /* Impossible code, to signal flush. */
+#define FIRST_CODE          4097    /* Impossible code, to signal first. */
+#define NO_SUCH_CODE        4098    /* Impossible code, to signal empty. */
+
+#define FILE_STATE_WRITE    0x01
+#define FILE_STATE_SCREEN   0x02
+#define FILE_STATE_IMAGE    0x04
+#define FILE_STATE_READ     0x08
+
+#define IS_READABLE(Private)    (Private->FileState & FILE_STATE_READ)
+#define IS_WRITEABLE(Private)   (Private->FileState & FILE_STATE_WRITE)
+
+typedef struct GifFilePrivateType {
+    GifWord FileState, FileHandle,  /* Where all this data goes to! */
+      BitsPerPixel,     /* Bits per pixel (Codes uses at least this + 1). */
+      ClearCode,   /* The CLEAR LZ code. */
+      EOFCode,     /* The EOF LZ code. */
+      RunningCode, /* The next code algorithm can generate. */
+      RunningBits, /* The number of bits required to represent RunningCode. */
+      MaxCode1,    /* 1 bigger than max. possible code, in RunningBits bits. */
+      LastCode,    /* The code before the current code. */
+      CrntCode,    /* Current algorithm code. */
+      StackPtr,    /* For character stack (see below). */
+      CrntShiftState;    /* Number of bits in CrntShiftDWord. */
+    unsigned long CrntShiftDWord;   /* For bytes decomposition into codes. */
+    unsigned long PixelCount;   /* Number of pixels in image. */
+    FILE *File;    /* File as stream. */
+    InputFunc Read;     /* function to read gif input (TVT) */
+    OutputFunc Write;   /* function to write gif output (MRB) */
+    GifByteType Buf[256];   /* Compressed input is buffered here. */
+    GifByteType Stack[LZ_MAX_CODE]; /* Decoded pixels are stacked here. */
+    GifByteType Suffix[LZ_MAX_CODE + 1];    /* So we can trace the codes. */
+    GifPrefixType Prefix[LZ_MAX_CODE + 1];
+    GifHashTableType *HashTable;
+    bool gif89;
+} GifFilePrivateType;
+
+#endif /* _GIF_LIB_PRIVATE_H */
+
+/* end */