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Add GZIP compression support

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- Fix a wrong call in PoolByteArray::compress
This commit is contained in:
George Marques
2017-07-13 14:41:10 -03:00
parent fca9c75f2b
commit 0f765c86e5
6 changed files with 24 additions and 14 deletions
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27
core/io/compression.cpp
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@@ -52,23 +52,22 @@ int Compression::compress(uint8_t *p_dst, const uint8_t *p_src, int p_src_size,
}
} break;
case MODE_DEFLATE: {
case MODE_DEFLATE:
case MODE_GZIP: {
int window_bits = p_mode == MODE_DEFLATE ? 15 : 15 + 16;
z_stream strm;
strm.zalloc = zipio_alloc;
strm.zfree = zipio_free;
strm.opaque = Z_NULL;
int level = GLOBAL_GET("compression/zlib/compression_level");
int err = deflateInit(&strm, level);
int level = p_mode == MODE_DEFLATE ? GLOBAL_GET("compression/zlib/compression_level") : GLOBAL_GET("compression/gzip/compression_level");
int err = deflateInit2(&strm, level, Z_DEFLATED, window_bits, 8, Z_DEFAULT_STRATEGY);
if (err != Z_OK)
return -1;
strm.avail_in = p_src_size;
int aout = deflateBound(&strm, p_src_size);
/*if (aout>p_src_size) {
deflateEnd(&strm);
return -1;
}*/
strm.avail_out = aout;
strm.next_in = (Bytef *)p_src;
strm.next_out = p_dst;
@@ -100,13 +99,16 @@ int Compression::get_max_compressed_buffer_size(int p_src_size, Mode p_mode) {
return ss;
} break;
case MODE_DEFLATE: {
case MODE_DEFLATE:
case MODE_GZIP: {
int window_bits = p_mode == MODE_DEFLATE ? 15 : 15 + 16;
z_stream strm;
strm.zalloc = zipio_alloc;
strm.zfree = zipio_free;
strm.opaque = Z_NULL;
int err = deflateInit(&strm, Z_DEFAULT_COMPRESSION);
int err = deflateInit2(&strm, Z_DEFAULT_COMPRESSION, Z_DEFLATED, window_bits, 8, Z_DEFAULT_STRATEGY);
if (err != Z_OK)
return -1;
int aout = deflateBound(&strm, p_src_size);
@@ -138,7 +140,10 @@ int Compression::decompress(uint8_t *p_dst, int p_dst_max_size, const uint8_t *p
}
return ret_size;
} break;
case MODE_DEFLATE: {
case MODE_DEFLATE:
case MODE_GZIP: {
int window_bits = p_mode == MODE_DEFLATE ? 15 : 15 + 16;
z_stream strm;
strm.zalloc = zipio_alloc;
@@ -146,7 +151,7 @@ int Compression::decompress(uint8_t *p_dst, int p_dst_max_size, const uint8_t *p
strm.opaque = Z_NULL;
strm.avail_in = 0;
strm.next_in = Z_NULL;
int err = inflateInit(&strm);
int err = inflateInit2(&strm, window_bits);
ERR_FAIL_COND_V(err != Z_OK, -1);
strm.avail_in = p_src_size;