ADDED small compression API

 - ADDED: CompressData()
 - ADDED: DecompressData()

1 files changed, 37 insertions, 0 deletions

diff --git a/src/core.c b/src/core.c
index 44ac12b5..1506a4fa 100644
--- a/src/core.c
+++ b/src/core.c
@@ -74,6 +74,11 @@
 *       Allow scale all the drawn content to match the high-DPI equivalent size (only PLATFORM_DESKTOP)
 *       NOTE: This flag is forced on macOS, since most displays are high-DPI
 *
+*   #define SUPPORT_COMPRESSION_API
+*       Support CompressData() and DecompressData() functions, those functions use zlib implementation
+*       provided by stb_image and stb_image_write libraries, so, those libraries must be enabled on textures module
+*       for linkage
+*
 *   DEPENDENCIES:
 *       rglfw    - Manage graphic device, OpenGL context and inputs on PLATFORM_DESKTOP (Windows, Linux, OSX. FreeBSD, OpenBSD, NetBSD, DragonFly)
 *       raymath  - 3D math functionality (Vector2, Vector3, Matrix, Quaternion)
@@ -252,6 +257,12 @@
     #include <emscripten/html5.h>       // Emscripten HTML5 library
 #endif
 
+#if defined(SUPPORT_COMPRESSION_API)
+    // NOTE: Those declarations require stb_image and stb_image_write definitions, included in textures module
+    unsigned char *stbi_zlib_compress(unsigned char *data, int data_len, int *out_len, int quality);
+    char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen);
+#endif
+
 //----------------------------------------------------------------------------------
 // Defines and Macros
 //----------------------------------------------------------------------------------
@@ -2019,6 +2030,32 @@ long GetFileModTime(const char *fileName)
     return 0;
 }
 
+// Compress data (DEFLATE algorythm)
+unsigned char *CompressData(unsigned char *data, int dataLength, int *compDataLength)
+{
+    #define COMPRESSION_QUALITY_DEFLATE  8
+    
+    unsigned char *compData = NULL;
+    
+#if defined(SUPPORT_COMPRESSION_API)
+    compData = stbi_zlib_compress(data, dataLength, compDataLength, COMPRESSION_QUALITY_DEFLATE);
+#endif
+
+    return compData;
+}
+
+// Decompress data (DEFLATE algorythm)
+char *DecompressData(char *compData, int compDataLength, int *dataLength)
+{
+    char *data = NULL;
+    
+#if defined(SUPPORT_COMPRESSION_API)
+    data = stbi_zlib_decode_malloc(compData, compDataLength, dataLength);
+#endif
+
+    return data;
+}
+
 // Save integer value to storage file (to defined position)
 // NOTE: Storage positions is directly related to file memory layout (4 bytes each integer)
 void StorageSaveValue(int position, int value)