From af7d5902062546e961a24e133c09f8ea49ae42db Mon Sep 17 00:00:00 2001
From: George Marques <george@gmarqu.es>
Date: Mon, 19 Jun 2017 02:46:29 -0300
Subject: Add basic compression functions to PoolBaseArray

---
 core/variant_call.cpp | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

(limited to 'core/variant_call.cpp')

diff --git a/core/variant_call.cpp b/core/variant_call.cpp
index 9ead727a80..6936a362e1 100644
--- a/core/variant_call.cpp
+++ b/core/variant_call.cpp
@@ -30,6 +30,7 @@
 #include "variant.h"
 
 #include "core_string_names.h"
+#include "io/compression.h"
 #include "object.h"
 #include "os/os.h"
 #include "script_language.h"
@@ -509,6 +510,44 @@ struct _VariantCall {
 		r_ret = s;
 	}
 
+	static void _call_PoolByteArray_compress(Variant &r_ret, Variant &p_self, const Variant **p_args) {
+
+		PoolByteArray *ba = reinterpret_cast<PoolByteArray *>(p_self._data._mem);
+		PoolByteArray compressed;
+		Compression::Mode mode = (Compression::Mode)(int)(*p_args[0]);
+
+		compressed.resize(Compression::get_max_compressed_buffer_size(ba->size()));
+		int result = Compression::compress(compressed.write().ptr(), ba->read().ptr(), ba->size(), mode);
+
+		result = result >= 0 ? result : 0;
+		compressed.resize(result);
+
+		r_ret = compressed;
+	}
+
+	static void _call_PoolByteArray_decompress(Variant &r_ret, Variant &p_self, const Variant **p_args) {
+
+		PoolByteArray *ba = reinterpret_cast<PoolByteArray *>(p_self._data._mem);
+		PoolByteArray decompressed;
+		Compression::Mode mode = (Compression::Mode)(int)(*p_args[1]);
+
+		int buffer_size = (int)(*p_args[0]);
+
+		if (buffer_size < 0) {
+			r_ret = decompressed;
+			ERR_EXPLAIN("Decompression buffer size is less than zero");
+			ERR_FAIL();
+		}
+
+		decompressed.resize(buffer_size);
+		int result = Compression::decompress(decompressed.write().ptr(), buffer_size, ba->read().ptr(), ba->size(), mode);
+
+		result = result >= 0 ? result : 0;
+		decompressed.resize(result);
+
+		r_ret = decompressed;
+	}
+
 	VCALL_LOCALMEM0R(PoolByteArray, size);
 	VCALL_LOCALMEM2(PoolByteArray, set);
 	VCALL_LOCALMEM1R(PoolByteArray, get);
@@ -1552,6 +1591,8 @@ void register_variant_methods() {
 
 	ADDFUNC0(POOL_BYTE_ARRAY, STRING, PoolByteArray, get_string_from_ascii, varray());
 	ADDFUNC0(POOL_BYTE_ARRAY, STRING, PoolByteArray, get_string_from_utf8, varray());
+	ADDFUNC1(POOL_BYTE_ARRAY, POOL_BYTE_ARRAY, PoolByteArray, compress, INT, "compression_mode", varray(0));
+	ADDFUNC2(POOL_BYTE_ARRAY, POOL_BYTE_ARRAY, PoolByteArray, decompress, INT, "buffer_size", INT, "compression_mode", varray(0));
 
 	ADDFUNC0(POOL_INT_ARRAY, INT, PoolIntArray, size, varray());
 	ADDFUNC2(POOL_INT_ARRAY, NIL, PoolIntArray, set, INT, "idx", INT, "integer", varray());
-- 
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