diff options
Diffstat (limited to 'core/io/compression.cpp')
| -rw-r--r-- | core/io/compression.cpp | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/core/io/compression.cpp b/core/io/compression.cpp new file mode 100644 index 0000000000..156767d241 --- /dev/null +++ b/core/io/compression.cpp @@ -0,0 +1,91 @@ +/*************************************************************************/ +/* compression.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* http://www.godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ +/* */ +/* Permission is hereby granted, free of charge, to any person obtaining */ +/* a copy of this software and associated documentation files (the */ +/* "Software"), to deal in the Software without restriction, including */ +/* without limitation the rights to use, copy, modify, merge, publish, */ +/* distribute, sublicense, and/or sell copies of the Software, and to */ +/* permit persons to whom the Software is furnished to do so, subject to */ +/* the following conditions: */ +/* */ +/* The above copyright notice and this permission notice shall be */ +/* included in all copies or substantial portions of the Software. */ +/* */ +/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ +/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ +/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ +/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ +/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ +/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/*************************************************************************/ +#include "compression.h"
+
+#include "fastlz.h"
+#include "os/copymem.h"
+
+int Compression::compress(uint8_t *p_dst, const uint8_t *p_src, int p_src_size,Mode p_mode) {
+
+ switch(p_mode) {
+ case MODE_FASTLZ: {
+
+ if (p_src_size<16) {
+ uint8_t src[16];
+ zeromem(&src[p_src_size],16-p_src_size);
+ copymem(src,p_src,p_src_size);
+ return fastlz_compress(src,16,p_dst);
+ } else {
+ return fastlz_compress(p_src,p_src_size,p_dst);
+ }
+
+ } break;
+ }
+
+ ERR_FAIL_V(-1);
+}
+
+int Compression::get_max_compressed_buffer_size(int p_src_size,Mode p_mode){
+
+ switch(p_mode) {
+ case MODE_FASTLZ: {
+
+
+ int ss = p_src_size+p_src_size*6/100;
+ if (ss<66)
+ ss=66;
+ return ss;
+
+ } break;
+ }
+
+ ERR_FAIL_V(-1);
+
+}
+
+
+
+void Compression::decompress(uint8_t *p_dst, int p_dst_max_size, const uint8_t *p_src, int p_src_size,Mode p_mode){
+
+ switch(p_mode) {
+ case MODE_FASTLZ: {
+
+ if (p_dst_max_size<16) {
+ uint8_t dst[16];
+ fastlz_decompress(p_src,p_src_size,dst,16);
+ copymem(p_dst,dst,p_dst_max_size);
+ } else {
+ fastlz_decompress(p_src,p_src_size,p_dst,p_dst_max_size);
+ }
+ return;
+ } break;
+ }
+
+ ERR_FAIL();
+}
|