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REDESIGN: Compresion API

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Now it compresses/decompresses valid DEFLATE streams instead of zlib streams. It uses the minimal and efficient libraries: sdefl/sinfl.
This commit is contained in:
Ray
2021-01-12 21:15:11 +01:00
parent dfa11e22cf
commit 5d1d590692
4 changed files with 1185 additions and 4 deletions
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26
src/core.c
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@@ -150,6 +150,14 @@
#include "external/msf_gif.h" // Support GIF recording
#endif
#if defined(SUPPORT_COMPRESSION_API)
#define SINFL_IMPLEMENTATION
#include "external/sinfl.h"
#define SDEFL_IMPLEMENTATION
#include "external/sdefl.h"
#endif
#include <stdlib.h> // Required for: srand(), rand(), atexit()
#include <stdio.h> // Required for: sprintf() [Used in OpenURL()]
#include <string.h> // Required for: strrchr(), strcmp(), strlen()
@@ -2558,8 +2566,13 @@ unsigned char *CompressData(unsigned char *data, int dataLength, int *compDataLe
unsigned char *compData = NULL;
#if defined(SUPPORT_COMPRESSION_API)
// TODO: WARNING: This function actually codes (and compresses) a valid zlib stream
compData = stbi_zlib_compress(data, dataLength, compDataLength, COMPRESSION_QUALITY_DEFLATE);
// Compress data and generate a valid DEFLATE stream
struct sdefl sdefl = { 0 };
int bounds = sdefl_bound(dataLength);
compData = (unsigned char *)RL_CALLOC(bounds, 1);
*compDataLength = sdeflate(&sdefl, compData, data, dataLength, COMPRESSION_QUALITY_DEFLATE); // Compression level 8, same as stbwi
TraceLog(LOG_INFO, "SYSTEM: Data compressed: Original size: %i -> Comp. size: %i\n", dataLength, compDataLength);
#endif
return compData;
@@ -2571,8 +2584,13 @@ unsigned char *DecompressData(unsigned char *compData, int compDataLength, int *
char *data = NULL;
#if defined(SUPPORT_COMPRESSION_API)
// TODO: WARNING: This function actually decodes (and decompresses) a valid zlib stream
data = stbi_zlib_decode_malloc((char *)compData, compDataLength, dataLength);
// Decompress data from a valid DEFLATE stream
data = RL_CALLOC(MAX_DECOMPRESSION_SIZE*1024*1024, 0);
int length = sinflate(data, compData, compDataLength);
RL_REALLOC(data, length);
*dataLength = length;
TraceLog(LOG_INFO, "SYSTEM: Data compressed: Original size: %i -> Comp. size: %i\n", dataLength, compDataLength);
#endif
return (unsigned char *)data;