From 4b5159394c7d3953f0196e28cd0f9f9a6017464a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Branimir=20Karad=C5=BEi=C4=87?= <branimirkaradzic@gmail.com>
Date: Sun, 1 Jun 2014 15:26:36 -0700
Subject: [PATCH] Added shared library support.

---
 include/bgfx.c99.h | 32 ++++++++++++++++++++--------
 premake/bgfx.lua   | 52 ++++++++++++++++++++++++++++++++++++++++++++++
 src/bgfx.cpp       |  2 --
 3 files changed, 75 insertions(+), 11 deletions(-)

diff --git a/include/bgfx.c99.h b/include/bgfx.c99.h
index b8e0cfc77..99595c708 100644
--- a/include/bgfx.c99.h
+++ b/include/bgfx.c99.h
@@ -253,16 +253,38 @@ typedef enum bgfx_fatal
 
 } bgfx_fatal_t;
 
+#ifndef BGFX_SHARED_LIB_BUILD
+#    define BGFX_SHARED_LIB_BUILD 0
+#endif // BGFX_SHARED_LIB_BUILD
+
+#ifndef BGFX_SHARED_LIB_USE
+#    define BGFX_SHARED_LIB_USE 0
+#endif // BGFX_SHARED_LIB_USE
+
 #if defined(_MSC_VER)
 #   define BGFX_VTBL_CALL __stdcall
 #   define BGFX_VTBL_THIS  // passed via ecx
 #   define BGFX_VTBL_THIS_ // passed via ecx
+#   if BGFX_SHARED_LIB_BUILD
+#       define BGFX_SHARED_LIB_API __declspec(dllexport)
+#   elif BGFX_SHARED_LIB_USE
+#       define BGFX_SHARED_LIB_API __declspec(dllimport)
+#   else
+#       define BGFX_SHARED_LIB_API
+#   endif // BGFX_SHARED_LIB_*
 #else
-#   define BGFX_VTBL_CALL _cdecl
+#   define BGFX_VTBL_CALL
 #   define BGFX_VTBL_THIS  BGFX_VTBL_INTEFRACE _this
 #   define BGFX_VTBL_THIS_ BGFX_VTBL_INTEFRACE _this,
+#   define BGFX_SHARED_LIB_API
 #endif // defined(_MSC_VER)
 
+#if defined(__cplusplus)
+#   define BGFX_C_API extern "C" BGFX_SHARED_LIB_API
+#else
+#   define BGFX_C_API BGFX_SHARED_LIB_API
+#endif // defined(__cplusplus)
+
 /**
  */
 typedef struct bgfx_callback_interface
@@ -355,12 +377,6 @@ typedef struct bgfx_reallocator_vtbl
 
 } bgfx_reallocator_vtbl_t;
 
-#if defined(__cplusplus)
-#    define BGFX_C_API extern "C"
-#else
-#    define BGFX_C_API
-#endif // defined(__cplusplus)
-
 /**
  *  Start vertex declaration.
  */
@@ -1283,6 +1299,4 @@ BGFX_C_API void bgfx_discard();
  */
 BGFX_C_API void bgfx_save_screen_shot(const char* _filePath);
 
-#undef BGFX_C_API
-
 #endif // BGFX_C99_H_HEADER_GUARD
diff --git a/premake/bgfx.lua b/premake/bgfx.lua
index 9b0a65edd..c2f8795e4 100644
--- a/premake/bgfx.lua
+++ b/premake/bgfx.lua
@@ -53,3 +53,55 @@ project "bgfx"
 	}
 
 	copyLib()
+
+project "bgfx-shared-lib"
+	uuid "09986168-e9d9-11e3-9c8e-f2aef940a72a"
+	kind "SharedLib"
+
+	includedirs {
+		BGFX_DIR .. "../bx/include",
+	}
+
+	defines {
+		"BGFX_SHARED_LIB_BUILD=1",
+--		"BGFX_CONFIG_RENDERER_OPENGL=1",
+	}
+
+	configuration { "Debug" }
+		defines {
+			"BGFX_CONFIG_DEBUG=1",
+		}
+
+	configuration { "windows" }
+		includedirs {
+			"$(DXSDK_DIR)/include",
+		}
+
+	configuration { "osx or ios*" }
+		files {
+			BGFX_DIR .. "src/**.mm",
+		}
+
+	configuration { "vs* or linux or mingw or osx or ios*" }
+		includedirs {
+			--nacl has GLES2 headers modified...
+			BGFX_DIR .. "3rdparty/khronos",
+		}
+
+	configuration {}
+
+	includedirs {
+		BGFX_DIR .. "include",
+	}
+
+	files {
+		BGFX_DIR .. "include/**.h",
+		BGFX_DIR .. "src/**.cpp",
+		BGFX_DIR .. "src/**.h",
+	}
+
+	excludes {
+		BGFX_DIR .. "src/**.bin.h",
+	}
+
+	copyLib()
diff --git a/src/bgfx.cpp b/src/bgfx.cpp
index 0fd5ee571..3c87c4b27 100644
--- a/src/bgfx.cpp
+++ b/src/bgfx.cpp
@@ -2619,8 +2619,6 @@ BX_STATIC_ASSERT(sizeof(bgfx::TransientVertexBuffer) == sizeof(bgfx_transient_ve
 BX_STATIC_ASSERT(sizeof(bgfx::InstanceDataBuffer)    == sizeof(bgfx_instance_data_buffer_t) );
 BX_STATIC_ASSERT(sizeof(bgfx::TextureInfo)           == sizeof(bgfx_texture_info_t) );
 
-#define BGFX_C_API extern "C"
-
 BGFX_C_API void bgfx_vertex_decl_begin(bgfx_vertex_decl_t* _decl, bgfx_renderer_type_t _renderer)
 {
 	bgfx::VertexDecl* decl = (bgfx::VertexDecl*)_decl;