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annotate src/dmzlib.h @ 949:6ed9465f3913

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Initial import of separated zlib decoding routines lifted from Sean Barrett's stb_image module (which is public domain). Still needs work to be more in line with DMLib standards.
author Matti Hamalainen <ccr@tnsp.org>
date Thu, 26 Feb 2015 18:28:32 +0200
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children 985225a93aeb
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949
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1 /*
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2 * DMLib
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3 * -- ZLib implementation
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4 * Public domain zlib decode v0.2 by Sean Barrett 2006-11-18
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5 * Modified and reformatted for DMLib by Matti 'ccr' Hamalainen
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6 */
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7 #ifndef DMZLIB_H
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8 #define DMZLIB_H
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9
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10 #include "dmlib.h"
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11
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12 #ifdef __cplusplus
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13 extern "C" {
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14 #endif
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15
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16 // fast-way is faster to check than jpeg huffman, but slow way is slower
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17 #define STBI__ZFAST_BITS 9 // accelerate all cases in default tables
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18 #define STBI__ZFAST_SIZE (1 << STBI__ZFAST_BITS)
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19 #define STBI__ZFAST_MASK (STBI__ZFAST_SIZE - 1)
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20
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21
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22 typedef struct
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23 {
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24 Uint16 fast[STBI__ZFAST_SIZE];
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25 Uint16 firstCode[16];
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26 int maxCode[17];
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27 Uint16 firstSymbol[16];
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28 Uint8 size[288];
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29 Uint16 value[288];
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30 } DMZHuffmanContext;
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31
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32
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33 typedef struct
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34 {
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35 Uint8 *zbuffer, *zbuffer_end;
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36
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37 int num_bits;
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38 Uint32 code_buffer;
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39
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40 char *zout, *zout_start, *zout_end;
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41 int z_expandable;
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42
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43 DMZHuffmanContext z_length, z_distance;
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44 } DMZLibContext;
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45
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46
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47 void dmZLibInit();
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48
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49 char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen);
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50 char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen);
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51 char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer,
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52 int len, int initial_size, int *outlen, BOOL parse_header);
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53 int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen);
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54 char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen);
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55 int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
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56
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57
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58 #ifdef __cplusplus
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59 }
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60 #endif
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61
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62 #endif // DMZLIB_H