Enabling linux build (in progress)

27 files changed, 637 insertions, 44 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dc7a4927..e7eb682a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,7 @@ cmake_minimum_required (VERSION 3.6)
 set(PLATFORM_WIN32 FALSE CACHE INTERNAL "")
 set(PLATFORM_UNIVERSAL_WINDOWS FALSE CACHE INTERNAL "")
 set(PLATFORM_ANDROID FALSE CACHE INTERNAL "")
+set(PLATFORM_LINUX FALSE CACHE INTERNAL "")
 set(D3D11_SUPPORTED FALSE CACHE INTERNAL "D3D11 is not spported")
 set(D3D12_SUPPORTED FALSE CACHE INTERNAL "D3D12 is not spported")
 set(GL_SUPPORTED FALSE CACHE INTERNAL "GL is not spported")
@@ -13,12 +14,18 @@ set(CMAKE_OBJECT_PATH_MAX 4096)
 if(WIN32)
 	if(${CMAKE_SYSTEM_NAME} STREQUAL "WindowsStore")
 		set(PLATFORM_UNIVERSAL_WINDOWS TRUE CACHE INTERNAL "Target platform: Windows Store")
+		message("Target platform: Universal Windows")
 	else()
 		set(PLATFORM_WIN32 TRUE CACHE INTERNAL "Target platform: Win32") #WIN32 is a variable, so we cannot use string "WIN32"
+		message("Target platform: Win32")
 	endif()
 else()
 	if(${CMAKE_SYSTEM_NAME} STREQUAL "Android")
 		set(PLATFORM_ANDROID TRUE CACHE INTERNAL "Target platform: Android")
+		message("Target platform: Android")
+	elseif(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
+		set(PLATFORM_LINUX TRUE CACHE INTERNAL "Target platform: Linux")
+		message("Target Platform: Linux")
 	else()
 		message(FATAL_ERROR "Unsupported platform")
 	endif()
@@ -38,6 +45,9 @@ elseif(PLATFORM_UNIVERSAL_WINDOWS)
 elseif(PLATFORM_ANDROID)
 	set(GLES_SUPPORTED TRUE CACHE INTERNAL "OpenGLES supported on Android platform")
 	target_compile_definitions(BuildSettings INTERFACE PLATFORM_ANDROID=1)
+elseif(PLATFORM_LINUX)
+	set(GL_SUPPORTED TRUE CACHE INTERNAL "OpenGL supported on Linux platform")
+	target_compile_definitions(BuildSettings INTERFACE PLATFORM_LINUX=1)
 else()
 	message(FATAL_ERROR "No PLATFORM_XXX variable defined. Make sure that 'DiligentCore' folder is processed first")
 endif()
@@ -71,6 +81,16 @@ if(MSVC)
 	# does not work as expected
 endif(MSVC)
 
+if(PLATFORM_LINUX)
+	if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
+		# Without -fPIC option GCC fails to link static libraries into dynamic library:
+		#  -fPIC  
+		#      If supported for the target machine, emit position-independent code, suitable for 
+		#      dynamic linking and avoiding any limit on the size of the global offset table.
+		target_compile_options(BuildSettings INTERFACE -fPIC)
+	endif()
+endif()
+
 if("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
 	set(ARCH 64 CACHE INTERNAL "64-bit architecture")
 else()
diff --git a/Common/include/StringTools.h b/Common/include/StringTools.h
index 6bf713de..74b6e7dd 100644
--- a/Common/include/StringTools.h
+++ b/Common/include/StringTools.h
@@ -70,7 +70,7 @@ inline std::wstring WidenString(const std::string &Str)
 
 inline int StrCmpNoCase(const char* Str1, const char* Str2, size_t NumChars)
 {
-#ifdef PLATFORM_ANDROID
+#if defined(PLATFORM_ANDROID) || defined(PLATFORM_LINUX)
 #   define _strnicmp strncasecmp
 #endif
 
@@ -79,7 +79,7 @@ inline int StrCmpNoCase(const char* Str1, const char* Str2, size_t NumChars)
 
 inline int StrCmpNoCase(const char* Str1, const char* Str2)
 {
-#ifdef PLATFORM_ANDROID
+#if defined(PLATFORM_ANDROID) || defined(PLATFORM_LINUX)
 #   define _stricmp strcasecmp
 #endif
 
diff --git a/External/CMakeLists.txt b/External/CMakeLists.txt
index 14890b34..55616bd8 100644
--- a/External/CMakeLists.txt
+++ b/External/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required (VERSION 3.6)
 
-if(PLATFORM_WIN32)
+if(PLATFORM_WIN32 OR PLATFORM_LINUX)
 	add_subdirectory(glew)
 endif()
 
diff --git a/External/glew/CMakeLists.txt b/External/glew/CMakeLists.txt
index 28f2a493..1562088e 100644
--- a/External/glew/CMakeLists.txt
+++ b/External/glew/CMakeLists.txt
@@ -16,7 +16,8 @@ set_common_target_properties(glew-static)
 
 target_compile_definitions(glew-static 
 PUBLIC
-	-DGLEW_STATIC
+	GLEW_STATIC
+	GLEW_NO_GLU
 )
 
 target_include_directories(glew-static 
diff --git a/Graphics/GraphicsEngine/interface/Sampler.h b/Graphics/GraphicsEngine/interface/Sampler.h
index a36eeae0..bc8a649d 100644
--- a/Graphics/GraphicsEngine/interface/Sampler.h
+++ b/Graphics/GraphicsEngine/interface/Sampler.h
@@ -26,6 +26,7 @@
 /// \file
 /// Definition of the Diligent::ISampler interface and related data structures
 
+#include <cfloat>
 #include "DeviceObject.h"
 
 namespace Diligent
diff --git a/Graphics/GraphicsEngineOpenGL/CMakeLists.txt b/Graphics/GraphicsEngineOpenGL/CMakeLists.txt
index 4ce567d0..bc4b423a 100644
--- a/Graphics/GraphicsEngineOpenGL/CMakeLists.txt
+++ b/Graphics/GraphicsEngineOpenGL/CMakeLists.txt
@@ -94,6 +94,8 @@ elseif(PLATFORM_ANDROID)
 	set(APPEND INCLUDE include/RenderDeviceGLESImpl.h)
 
 	set(APPEND INTERFACE interface/RenderDeviceGLES.h)
+elseif(PLATFORM_LINUX)
+	set(APPEND INCLUDE include/GLContextLinux.h)
 else()
 	message(FATAL_ERROR "Unknown platform")
 endif()
@@ -151,6 +153,8 @@ elseif(PLATFORM_ANDROID)
 	target_compile_definitions(GraphicsEngineOpenGL-static PRIVATE BUILDING_DLL USE_GL3_STUB=0)
 	target_compile_definitions(GraphicsEngineOpenGL-shared PRIVATE BUILDING_DLL USE_GL3_STUB=0)
 	set_target_properties(GraphicsEngineOpenGL-shared PROPERTIES CXX_VISIBILITY_PRESET hidden) # -fvisibility=hidden
+elseif(PLATFORM_LINUX)
+	set(PRIVATE_DEPENDENCIES ${PRIVATE_DEPENDENCIES} glew-static)
 else()
 	message(FATAL_ERROR "Unknown platform")
 endif()
diff --git a/Graphics/GraphicsEngineOpenGL/include/GLContext.h b/Graphics/GraphicsEngineOpenGL/include/GLContext.h
index 2db25f4c..d5ca746e 100644
--- a/Graphics/GraphicsEngineOpenGL/include/GLContext.h
+++ b/Graphics/GraphicsEngineOpenGL/include/GLContext.h
@@ -23,10 +23,12 @@
 
 #pragma once
 
-#ifdef PLATFORM_WIN32
-#include "GLContextWindows.h"
-#endif
-
-#ifdef ANDROID
-#include "GLContextAndroid.h"
+#if defined(PLATFORM_WIN32)
+#   include "GLContextWindows.h"
+#elif defined(PLATFORM_ANDROID)
+#   include "GLContextAndroid.h"
+#elif defined(PLATFORM_LINUX)
+#   include "GLContextLinux.h"
+#else
+#   error Unsupported platform
 #endif
diff --git a/Graphics/GraphicsEngineOpenGL/include/GLContextAndroid.h b/Graphics/GraphicsEngineOpenGL/include/GLContextAndroid.h
index d2892c1e..68270a8f 100644
--- a/Graphics/GraphicsEngineOpenGL/include/GLContextAndroid.h
+++ b/Graphics/GraphicsEngineOpenGL/include/GLContextAndroid.h
@@ -51,7 +51,7 @@ namespace Diligent
         void Suspend();
         EGLint Resume( ANativeWindow* window );
 
-        const SwapChainDesc& GetSwapChainDesc(){ return SwapChainAttribs_; }
+        const SwapChainDesc& GetSwapChainDesc()const{ return SwapChainAttribs_; }
         
         NativeGLContextType GetCurrentNativeGLContext();
 
diff --git a/Graphics/GraphicsEngineOpenGL/include/GLContextLinux.h b/Graphics/GraphicsEngineOpenGL/include/GLContextLinux.h
new file mode 100644
index 00000000..ff6796cb
--- /dev/null
+++ b/Graphics/GraphicsEngineOpenGL/include/GLContextLinux.h
@@ -0,0 +1,52 @@
+/*     Copyright 2015-2017 Egor Yusov
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  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 OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+#pragma once
+
+namespace Diligent
+{
+
+    struct ContextInitInfo
+    {
+        SwapChainDesc SwapChainAttribs;
+        void *pNativeWndHandle = nullptr;
+    };
+
+    class GLContext
+    {
+    public:
+        typedef void* NativeGLContextType;
+
+        GLContext(const ContextInitInfo &Info, struct DeviceCaps &DeviceCaps) {}
+        ~GLContext() {}
+        void SwapBuffers() {}
+
+        const SwapChainDesc& GetSwapChainDesc()const{ return m_SwapChainAttribs; }
+
+        NativeGLContextType GetCurrentNativeGLContext() { return nullptr; }
+
+    private:
+        void* m_Context;
+        SwapChainDesc m_SwapChainAttribs;
+    };
+}
diff --git a/Graphics/GraphicsEngineOpenGL/include/GLContextWindows.h b/Graphics/GraphicsEngineOpenGL/include/GLContextWindows.h
index adc2984a..38895afa 100644
--- a/Graphics/GraphicsEngineOpenGL/include/GLContextWindows.h
+++ b/Graphics/GraphicsEngineOpenGL/include/GLContextWindows.h
@@ -41,7 +41,7 @@ namespace Diligent
         ~GLContext();
         void SwapBuffers();
 
-        const SwapChainDesc& GetSwapChainDesc(){ return m_SwapChainAttribs; }
+        const SwapChainDesc& GetSwapChainDesc()const{ return m_SwapChainAttribs; }
 
         NativeGLContextType GetCurrentNativeGLContext();
 
diff --git a/Graphics/GraphicsEngineOpenGL/include/pch.h b/Graphics/GraphicsEngineOpenGL/include/pch.h
index 9e6faac7..dd037ed6 100644
--- a/Graphics/GraphicsEngineOpenGL/include/pch.h
+++ b/Graphics/GraphicsEngineOpenGL/include/pch.h
@@ -35,35 +35,48 @@
 #include <unordered_set>
 #include <algorithm>
 
-// Must be defined to use static version of glew
-#ifdef PLATFORM_WIN32
+#if defined(PLATFORM_WIN32)
+
 #   ifndef GLEW_STATIC
-#       define GLEW_STATIC
+#       define GLEW_STATIC // Must be defined to use static version of glew
 #   endif
-    #include "glew.h"
+#   include "glew.h"
     // Glew includes <windows.h>
-    #define NOMINMAX
-    #include "wglew.h"
-    #include <GL/GL.h>
-#endif
+#   define NOMINMAX
+#   include "wglew.h"
+#   include <GL/GL.h>
 
+#elif defined(PLATFORM_LINUX)
 
-#ifdef ANDROID
-#ifndef USE_GL3_STUB
-    #define USE_GL3_STUB 0
-#endif
-    #if USE_GL3_STUB
-        #include "gl3stub.h"
-        #include <GLES2/gl2platform.h>
-    #else
-        #include <GLES3/gl3.h>
-        #include <GLES3/gl3ext.h>
-    #endif
+#   ifndef GLEW_STATIC
+#       define GLEW_STATIC // Must be defined to use static version of glew
+#   endif
+#   ifndef GLEW_NO_GLU
+#       define GLEW_NO_GLU
+#   endif
+
+#   include "glew.h"
+
+#   elif defined(PLATFORM_ANDROID)
+
+#   ifndef USE_GL3_STUB
+#       define USE_GL3_STUB 0
+#   endif
+#   if USE_GL3_STUB
+#       include "gl3stub.h"
+#       include <GLES2/gl2platform.h>
+#   else
+#       include <GLES3/gl3.h>
+#       include <GLES3/gl3ext.h>
+#   endif
+
+#else
+#   error Unsupported platform
 #endif
 
 #include "Errors.h"
 
-#ifdef ANDROID
+#ifdef PLATFORM_ANDROID
     // GLStubs must be included after GLFeatures!
     #include "GLStubs.h"
 #endif
diff --git a/Graphics/GraphicsEngineOpenGL/interface/BaseInterfacesGL.h b/Graphics/GraphicsEngineOpenGL/interface/BaseInterfacesGL.h
index cad22936..45a281d7 100644
--- a/Graphics/GraphicsEngineOpenGL/interface/BaseInterfacesGL.h
+++ b/Graphics/GraphicsEngineOpenGL/interface/BaseInterfacesGL.h
@@ -23,20 +23,20 @@
 
 #pragma once
 
-#ifdef ANDROID
+#if defined(PLATFORM_ANDROID)
     #include "RenderDeviceGLES.h"
     namespace Diligent
     {
         using IGLDeviceBaseInterface = IRenderDeviceGLES;
     }
-#endif
-
-#ifdef PLATFORM_WIN32
+#elif defined(PLATFORM_WIN32) || defined(PLATFORM_LINUX)
     #include "RenderDeviceGL.h"
     namespace Diligent
     {
         using IGLDeviceBaseInterface = IRenderDeviceGL;
     }
+#else
+#   error Unsupported platform
 #endif
 
 #include "DeviceContextGL.h"
diff --git a/Graphics/GraphicsEngineOpenGL/interface/RenderDeviceFactoryOpenGL.h b/Graphics/GraphicsEngineOpenGL/interface/RenderDeviceFactoryOpenGL.h
index 8876b9ae..cbf67c8a 100644
--- a/Graphics/GraphicsEngineOpenGL/interface/RenderDeviceFactoryOpenGL.h
+++ b/Graphics/GraphicsEngineOpenGL/interface/RenderDeviceFactoryOpenGL.h
@@ -35,7 +35,7 @@
 
 #   define API_QUALIFIER
 
-#elif defined(PLATFORM_ANDROID)
+#elif defined(PLATFORM_ANDROID) || defined(PLATFORM_LINUX)
 
 #   ifdef ENGINE_DLL
 #       ifdef BUILDING_DLL
diff --git a/Graphics/GraphicsEngineOpenGL/src/RenderDeviceFactoryOpenGL.cpp b/Graphics/GraphicsEngineOpenGL/src/RenderDeviceFactoryOpenGL.cpp
index a18ca767..aa19f8ee 100644
--- a/Graphics/GraphicsEngineOpenGL/src/RenderDeviceFactoryOpenGL.cpp
+++ b/Graphics/GraphicsEngineOpenGL/src/RenderDeviceFactoryOpenGL.cpp
@@ -39,10 +39,12 @@
 namespace Diligent
 {
 
-#if defined(PLATFORM_WIN32) || defined(PLATFORM_UNIVERSAL_WINDOWS)
+#if defined(PLATFORM_WIN32) || defined(PLATFORM_UNIVERSAL_WINDOWS) || defined(PLATFORM_LINUX)
     typedef RenderDeviceGLImpl TRenderDeviceGLImpl;
 #elif defined(PLATFORM_ANDROID)
     typedef RenderDeviceGLESImpl TRenderDeviceGLImpl;
+#else
+#   error Unsupported platform
 #endif
 
 /// Engine factory for OpenGL implementation
diff --git a/Graphics/GraphicsEngineOpenGL/src/Texture2DArray_OGL.cpp b/Graphics/GraphicsEngineOpenGL/src/Texture2DArray_OGL.cpp
index b199439d..44507f58 100644
--- a/Graphics/GraphicsEngineOpenGL/src/Texture2DArray_OGL.cpp
+++ b/Graphics/GraphicsEngineOpenGL/src/Texture2DArray_OGL.cpp
@@ -48,7 +48,7 @@ Texture2DArray_OGL::Texture2DArray_OGL( IReferenceCounters *pRefCounters,
     if( m_Desc.SampleCount > 1 )
     {
         //                                                              format          width         height          depth
-        glTexStorage3DMultisample(m_BindTarget, m_Desc.SampleCount, m_GLTexFormat, m_Desc.Width, m_Desc.Height, m_Desc.ArraySize, TRUE);
+        glTexStorage3DMultisample(m_BindTarget, m_Desc.SampleCount, m_GLTexFormat, m_Desc.Width, m_Desc.Height, m_Desc.ArraySize, GL_TRUE);
         // The last parameter specifies whether the image will use identical sample locations and the same number of 
         // samples for all texels in the image, and the sample locations will not depend on the internal format or size 
         // of the image.
diff --git a/Platforms/CMakeLists.txt b/Platforms/CMakeLists.txt
index 77fa5ce6..d51bdb08 100644
--- a/Platforms/CMakeLists.txt
+++ b/Platforms/CMakeLists.txt
@@ -15,6 +15,9 @@ elseif(PLATFORM_UNIVERSAL_WINDOWS)
 elseif(PLATFORM_ANDROID)
 	add_subdirectory(Android)
 	add_library(TargetPlatform ALIAS AndroidPlatform)
+elseif(PLATFORM_LINUX)
+	add_subdirectory(Linux)
+	add_library(TargetPlatform ALIAS LinuxPlatform)
 else()
 	message(FATAL_ERROR "No PLATFORM_XXX variable defined. Make sure that 'DiligentCore' folder is processed first")
 endif()
diff --git a/Platforms/Linux/CMakeLists.txt b/Platforms/Linux/CMakeLists.txt
new file mode 100644
index 00000000..220160af
--- /dev/null
+++ b/Platforms/Linux/CMakeLists.txt
@@ -0,0 +1,39 @@
+cmake_minimum_required (VERSION 3.6)
+
+project(LinuxPlatform CXX)
+
+set(INCLUDE 
+	include/LinuxDebug.h
+	include/LinuxFileSystem.h
+	include/LinuxPlatformDefinitions.h
+	include/LinuxPlatformMisc.h
+)
+
+set(SOURCE 
+	src/LinuxDebug.cpp
+	src/LinuxFileSystem.cpp
+)
+
+add_library(LinuxPlatform ${SOURCE} ${INCLUDE})
+set_common_target_properties(LinuxPlatform)
+
+target_include_directories(LinuxPlatform 
+PUBLIC
+	include
+)
+
+target_link_libraries(LinuxPlatform 
+PRIVATE 
+	BuildSettings 
+	Common 
+PUBLIC
+	PlatformInterface
+	BasicPlatform
+)
+
+source_group("src" FILES ${SOURCE})
+source_group("include" FILES ${INCLUDE})
+
+set_target_properties(LinuxPlatform PROPERTIES
+	FOLDER Core/Platforms
+)
diff --git a/Platforms/Linux/include/LinuxDebug.h b/Platforms/Linux/include/LinuxDebug.h
new file mode 100644
index 00000000..1c24f6d1
--- /dev/null
+++ b/Platforms/Linux/include/LinuxDebug.h
@@ -0,0 +1,32 @@
+/*     Copyright 2015-2017 Egor Yusov
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  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 OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+#pragma once
+
+#include "../Basic/include/BasicPlatformDebug.h"
+
+struct LinuxDebug : public BasicPlatformDebug
+{
+    static void AssertionFailed( const Diligent::Char *Message, const char *Function, const char *File, int Line );
+    static void OutputDebugMessage( DebugMessageSeverity Severity, const Diligent::Char *Message );
+};
diff --git a/Platforms/Linux/include/LinuxFileSystem.h b/Platforms/Linux/include/LinuxFileSystem.h
new file mode 100644
index 00000000..0fa33a54
--- /dev/null
+++ b/Platforms/Linux/include/LinuxFileSystem.h
@@ -0,0 +1,66 @@
+/*     Copyright 2015-2017 Egor Yusov
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  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 OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+#pragma once
+
+#include "../Basic/include/BasicFileSystem.h"
+
+#include <memory>
+#include <vector>
+
+class LinuxFile : public BasicFile
+{
+public:
+    LinuxFile( const FileOpenAttribs &OpenAttribs );
+    ~LinuxFile();
+
+    void Read( Diligent::IDataBlob *pData );
+
+    bool Read( void* Data, size_t BufferSize );
+
+    bool Write( const void *Data, size_t BufferSize );
+
+    size_t GetSize();
+
+    size_t GetPos();
+
+    void SetPos(size_t Offset, FilePosOrigin Origin);
+
+private:
+    //FILE *m_pFile;
+};
+
+struct LinuxFileSystem : public BasicFileSystem
+{
+public:
+    static LinuxFile* OpenFile( const FileOpenAttribs &OpenAttribs );
+    static inline Diligent::Char GetSlashSymbol(){ return '/'; }
+
+    static bool FileExists( const Diligent::Char *strFilePath );
+    static bool PathExists( const Diligent::Char *strPath );
+    
+    static bool CreateDirectory( const Diligent::Char *strPath );
+    static void ClearDirectory( const Diligent::Char *strPath );
+    static void DeleteFile( const Diligent::Char *strPath );
+    static std::vector<std::unique_ptr<FindFileData>> Search(const Diligent::Char *SearchPattern);
+};
diff --git a/Platforms/Linux/include/LinuxPlatformDefinitions.h b/Platforms/Linux/include/LinuxPlatformDefinitions.h
new file mode 100644
index 00000000..454c7446
--- /dev/null
+++ b/Platforms/Linux/include/LinuxPlatformDefinitions.h
@@ -0,0 +1,30 @@
+/*     Copyright 2015-2017 Egor Yusov
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  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 OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+#pragma once
+
+#include <cstddef>
+
+template <typename _CountofType, std::size_t _SizeOfArray>
+char (*__countof_helper(_CountofType (&_Array)[_SizeOfArray]))[_SizeOfArray];
+#define _countof(_Array) (sizeof(*__countof_helper(_Array)) + 0)
diff --git a/Platforms/Linux/include/LinuxPlatformMisc.h b/Platforms/Linux/include/LinuxPlatformMisc.h
new file mode 100644
index 00000000..a961f468
--- /dev/null
+++ b/Platforms/Linux/include/LinuxPlatformMisc.h
@@ -0,0 +1,43 @@
+/*     Copyright 2015-2017 Egor Yusov
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  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 OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+#pragma once
+
+#include "../Basic/include/BasicPlatformMisc.h"
+#include "DebugUtilities.h"
+
+struct LinuxMisc : public BasicPlatformMisc
+{
+    static Diligent::Uint32 GetMSB(Diligent::Uint32 Val)
+    {
+        if( Val == 0 )return 32;
+
+        // Returns the number of leading 0-bits in x, starting at the 
+        // most significant bit position. If x is 0, the result is undefined.
+        auto LeadingZeros = __builtin_clz(Val);
+        auto MSB = 31 - LeadingZeros;
+        VERIFY_EXPR(MSB == BasicPlatformMisc::GetMSB(Val));
+
+        return MSB;
+    }
+};
diff --git a/Platforms/Linux/src/LinuxDebug.cpp b/Platforms/Linux/src/LinuxDebug.cpp
new file mode 100644
index 00000000..2ffb7a12
--- /dev/null
+++ b/Platforms/Linux/src/LinuxDebug.cpp
@@ -0,0 +1,50 @@
+/*     Copyright 2015-2017 Egor Yusov
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  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 OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+#include "LinuxDebug.h"
+#include "FormatMessage.h"
+#include "FileSystem.h"
+//#include <Linux/log.h>
+#include <csignal>
+#include <cassert>
+
+void LinuxDebug :: AssertionFailed( const Diligent::Char *Message, const char *Function, const char *File, int Line )
+{
+    assert(false);
+    //std::string FileName;
+    //FileSystem::SplitFilePath( File, nullptr, &FileName );
+    //std::stringstream msgss;
+    //Diligent::FormatMsg( msgss, "\nDebug assertion failed in ", Function, "(), file ", FileName, ", line ", Line, ":\n", Message);
+    //auto FullMsg = msgss.str();
+    //OutputDebugMessage( DebugMessageSeverity::Error, FullMsg.c_str() );
+
+    //raise( SIGTRAP );
+};
+
+
+void LinuxDebug::OutputDebugMessage( DebugMessageSeverity Severity, const Diligent::Char *Message )
+{
+    assert(false);
+    //static const Linux_LogPriority Priorities[] = { Linux_LOG_INFO, Linux_LOG_WARN, Linux_LOG_ERROR, Linux_LOG_FATAL };
+    //__Linux_log_print( Priorities[static_cast<int>(Severity)], "Graphics Engine", "%s", Message );
+}
diff --git a/Platforms/Linux/src/LinuxFileSystem.cpp b/Platforms/Linux/src/LinuxFileSystem.cpp
new file mode 100644
index 00000000..2ac59630
--- /dev/null
+++ b/Platforms/Linux/src/LinuxFileSystem.cpp
@@ -0,0 +1,190 @@
+/*     Copyright 2015-2017 Egor Yusov
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  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 OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+#include "LinuxFileSystem.h"
+#include "Errors.h"
+#include "DebugUtilities.h"
+
+LinuxFile::LinuxFile( const FileOpenAttribs &OpenAttribs ) : 
+    BasicFile(OpenAttribs, LinuxFileSystem::GetSlashSymbol())/*,
+    m_pFile(nullptr)*/
+{
+    //auto OpenModeStr = GetOpenModeStr();
+
+    //for (;; )
+    //{
+    //    errno_t err = fopen_s(&m_pFile, m_OpenAttribs.strFilePath, OpenModeStr.c_str());
+    //    if (err == 0)
+    //    {
+    //        break;
+    //    }
+    //    else if (err == ENFILE || // Too many files open in system 
+    //        err == EMFILE)  // Too many open files 
+    //    {
+    //        // No more file descriptors are available: we have to wait
+    //        //g_SystemMetricsStream << "Failed to open file " << FileName;
+    //        //g_SystemMetricsStream << "\nWaiting 50 ms...\n";
+    //        //Sleep(50);
+    //        continue;
+    //    }
+    //    else
+    //    {
+    //        char errstr[128];
+    //        strerror_s(errstr, _countof(errstr), err);
+    //        LOG_ERROR_AND_THROW("Failed to open file ", m_OpenAttribs.strFilePath,
+    //            "\nThe following error occured: ", errstr);
+    //    }
+    //}
+}
+
+LinuxFile::~LinuxFile()
+{
+    //if( m_pFile )
+    //{
+    //    fclose( m_pFile );
+    //    m_pFile = nullptr;
+    //}
+}
+
+void LinuxFile::Read( Diligent::IDataBlob *pData )
+{
+#if 0
+    auto FullPath = m_OpenAttribs.strFilePath;
+    std::vector<Diligent::Uint8> Data;
+    bool b = JNIHelper::GetInstance()->ReadFile( FullPath, &Data );
+    if( b )
+    {
+        pData->Resize( Data.size() );
+        memcpy( pData->GetDataPtr(), Data.data(), Data.size() );
+    }
+    else
+    {
+        LOG_ERROR_MESSAGE( "Unable to open file ", m_OpenAttribs.strFilePath, "\nFull path: ", FullPath );
+    }
+#endif
+    UNSUPPORTED("Not implemented")
+}
+
+size_t LinuxFile::GetSize()
+{
+    UNSUPPORTED( "Not implemented" );
+
+    return 0;
+}
+
+bool LinuxFile::Read( void *Data, size_t BufferSize )
+{
+    UNSUPPORTED( "Not implemented" );
+
+    //VERIFY( m_pFile, "File not opened" );
+    //auto OrigPos = ftell( m_pFile );
+    //fseek( m_pFile, 0, SEEK_END );
+    //auto FileSize = ftell( m_pFile );
+    //fseek( m_pFile, 0, SEEK_SET );
+    //Data.resize( FileSize );
+    //auto ItemsRead = fread( Data.data(), FileSize, 1, m_pFile );
+    //fseek( m_pFile, OrigPos, SEEK_SET );
+    //return ItemsRead == 1;
+    return false;
+}
+
+bool LinuxFile::Write( const void *Data, size_t BufferSize )
+{
+    UNSUPPORTED( "Not implemented" );
+
+    return false;
+}
+
+size_t LinuxFile::GetPos()
+{
+    UNSUPPORTED( "Not implemented" );
+
+    return 0;
+}
+
+void LinuxFile::SetPos(size_t Offset, FilePosOrigin Origin)
+{
+    UNSUPPORTED( "Not implemented" );
+}
+
+
+LinuxFile* LinuxFileSystem::OpenFile( const FileOpenAttribs &OpenAttribs )
+{
+    LinuxFile *pFile = nullptr;
+#if 0
+    try
+    {
+        pFile = new LinuxFile( OpenAttribs );
+    }
+    catch( const std::runtime_error &err )
+    {
+
+    }
+#endif
+    UNSUPPORTED("Not implemented")
+    return pFile;
+}
+
+
+bool LinuxFileSystem::FileExists( const Diligent::Char *strFilePath )
+{
+#if 0
+    FileOpenAttribs OpenAttribs;
+    OpenAttribs.strFilePath = strFilePath;
+    BasicFile DummyFile( OpenAttribs, LinuxFileSystem::GetSlashSymbol() );
+    const auto& Path = DummyFile.GetPath();
+    std::vector<Diligent::Uint8> Data;
+    bool b = JNIHelper::GetInstance()->ReadFile( Path.c_str(), &Data );
+    return b;
+#endif
+    UNSUPPORTED("Not implemented")
+    return false;
+}
+
+bool LinuxFileSystem::PathExists( const Diligent::Char *strPath )
+{
+    UNSUPPORTED( "Not implemented" );
+    return false;
+}
+    
+bool LinuxFileSystem::CreateDirectory( const Diligent::Char *strPath )
+{
+    UNSUPPORTED( "Not implemented" );
+    return false;
+}
+
+void LinuxFileSystem::ClearDirectory( const Diligent::Char *strPath )
+{
+    UNSUPPORTED( "Not implemented" );
+}
+
+void LinuxFileSystem::DeleteFile( const Diligent::Char *strPath )
+{
+    UNSUPPORTED( "Not implemented" );
+}
+    
+std::vector<std::unique_ptr<FindFileData>> LinuxFileSystem::Search(const Diligent::Char *SearchPattern)
+{
+    UNSUPPORTED( "Not implemented" );
+    return std::vector<std::unique_ptr<FindFileData>>();
+}
diff --git a/Platforms/interface/FileSystem.h b/Platforms/interface/FileSystem.h
index 91f20e58..f9ce26f3 100644
--- a/Platforms/interface/FileSystem.h
+++ b/Platforms/interface/FileSystem.h
@@ -42,4 +42,13 @@
     #include "../Android/include/AndroidFileSystem.h"
     typedef AndroidFileSystem FileSystem;
     typedef AndroidFile       CFile;
+
+#elif defined ( PLATFORM_LINUX )
+
+    #include "../Linux/include/LinuxFileSystem.h"
+    typedef LinuxFileSystem FileSystem;
+    typedef LinuxFile       CFile;
+
+#elif
+    #error Unsupported platform
 #endif
diff --git a/Platforms/interface/PlatformDebug.h b/Platforms/interface/PlatformDebug.h
index 994f6849..0e00e76c 100644
--- a/Platforms/interface/PlatformDebug.h
+++ b/Platforms/interface/PlatformDebug.h
@@ -36,4 +36,11 @@
 #elif defined ( PLATFORM_ANDROID )
     #include "../Android/include/AndroidDebug.h"
     typedef AndroidDebug PlatformDebug;
+
+#elif defined ( PLATFORM_LINUX )
+    #include "../Linux/include/LinuxDebug.h"
+    typedef LinuxDebug PlatformDebug;
+
+#else
+    #error Unsupported platform
 #endif
diff --git a/Platforms/interface/PlatformDefinitions.h b/Platforms/interface/PlatformDefinitions.h
index 6d1adcec..3f8638e2 100644
--- a/Platforms/interface/PlatformDefinitions.h
+++ b/Platforms/interface/PlatformDefinitions.h
@@ -24,18 +24,21 @@
 #pragma once
 
 #if defined(ANDROID)
-#   if defined (PLATFORM_UNIVERSAL_WINDOWS) || defined (PLATFORM_WIN32) 
-#       error Conflicting platform macros
-#   endif
 #   ifndef PLATFORM_ANDROID
 #       define PLATFORM_ANDROID
 #   endif
-#elif !defined (PLATFORM_UNIVERSAL_WINDOWS) && !defined (PLATFORM_WIN32) 
+#endif
+
+#if !defined(PLATFORM_WIN32) && !defined(PLATFORM_UNIVERSAL_WINDOWS) && !defined(PLATFORM_ANDROID) && !defined(PLATFORM_LINUX)
     #error Platform is not defined
 #endif
 
 #if defined( PLATFORM_WIN32 )
 
+#   if defined(PLATFORM_UNIVERSAL_WINDOWS) || defined(PLATFORM_ANDROID) || defined(PLATFORM_LINUX) 
+#       error Conflicting platform macros
+#   endif
+
 #   include "..\Win32\include\Win32PlatformDefinitions.h"
 
 #   define OPENGL_SUPPORTED 1
@@ -44,13 +47,21 @@
 
 #elif defined( PLATFORM_UNIVERSAL_WINDOWS )
 
+#   if defined(PLATFORM_WIN32) || defined(PLATFORM_ANDROID) || defined(PLATFORM_LINUX) 
+#       error Conflicting platform macros
+#   endif
+
 #   include "..\UWP\include\UWPDefinitions.h"
 
 #   define OPENGL_SUPPORTED 0
 #   define D3D11_SUPPORTED 1
 #   define D3D12_SUPPORTED 1
 
-#elif defined ( PLATFORM_ANDROID )
+#elif defined( PLATFORM_ANDROID )
+
+#   if defined (PLATFORM_WIN32) || defined(PLATFORM_UNIVERSAL_WINDOWS) || defined (PLATFORM_LINUX) 
+#       error Conflicting platform macros
+#   endif
 
 #   include "../Android/include/AndroidPlatformDefinitions.h"
 
@@ -58,4 +69,16 @@
 #   define D3D11_SUPPORTED 0
 #   define D3D12_SUPPORTED 0
 
+#elif defined( PLATFORM_LINUX )
+
+#   if defined(PLATFORM_WIN32) || defined(PLATFORM_UNIVERSAL_WINDOWS) || defined(PLATFORM_ANDROID) 
+#       error Conflicting platform macros
+#   endif
+
+#   include "../Linux/include/LinuxPlatformDefinitions.h"
+
+#   define OPENGL_SUPPORTED 1
+#   define D3D11_SUPPORTED 0
+#   define D3D12_SUPPORTED 0
+
 #endif
diff --git a/Platforms/interface/PlatformMisc.h b/Platforms/interface/PlatformMisc.h
index fbcbcff6..b4d10aaa 100644
--- a/Platforms/interface/PlatformMisc.h
+++ b/Platforms/interface/PlatformMisc.h
@@ -32,4 +32,10 @@
 #elif defined ( PLATFORM_ANDROID )
     #include "../Android/include/AndroidPlatformMisc.h"
     typedef AndroidMisc PlatformMisc;
+
+#elif defined ( PLATFORM_LINUX )
+    #include "../Linux/include/LinuxPlatformMisc.h"
+    typedef LinuxMisc PlatformMisc;
+#else
+    #error Unsupported platform
 #endif