From 94c5d2b9e85add3412169a93bd6f40a5f84c21e4 Mon Sep 17 00:00:00 2001
From: Joshua Brookover <josh@jalb.me>
Date: Fri, 16 Sep 2016 01:21:37 -0500
Subject: [PATCH] OVR support via BGFX_USE_OVR

---
 CMakeLists.txt   |  6 ++++++
 cmake/bgfx.cmake |  6 +++++-
 cmake/ovr.cmake  | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100644 cmake/ovr.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c3a74df..f66694d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -19,6 +19,12 @@ endif()
 option( BGFX_BUILD_TOOLS    "Build bgfx tools."    ON )
 option( BGFX_BUILD_EXAMPLES "Build bgfx examples." ON )
 
+option( BGFX_USE_OVR "Build with OVR support." OFF )
+
+if( BGFX_USE_OVR )
+	include( cmake/ovr.cmake )
+endif()
+
 include( cmake/shared.cmake )
 include( cmake/bx.cmake )
 include( cmake/bgfx.cmake )
diff --git a/cmake/bgfx.cmake b/cmake/bgfx.cmake
index 3665a32..0e353a3 100755
--- a/cmake/bgfx.cmake
+++ b/cmake/bgfx.cmake
@@ -40,6 +40,11 @@ target_include_directories( bgfx PUBLIC ${BGFX_DIR}/include )
 # bgfx depends on bx
 target_link_libraries( bgfx PUBLIC bx )
 
+# ovr support
+if( BGFX_USE_OVR )
+	target_link_libraries( bgfx PUBLIC ovr )
+endif()
+
 # Link against psapi in Visual Studio
 if( MSVC )
 	target_link_libraries( bgfx PUBLIC psapi )
@@ -61,7 +66,6 @@ endif()
 # Excluded files from compilation
 set_source_files_properties( ${BGFX_DIR}/src/amalgamated.cpp PROPERTIES HEADER_FILE_ONLY ON )
 set_source_files_properties( ${BGFX_DIR}/src/amalgamated.mm PROPERTIES HEADER_FILE_ONLY ON )
-set_source_files_properties( ${BGFX_DIR}/src/hmd_ovr.cpp PROPERTIES HEADER_FILE_ONLY ON )
 set_source_files_properties( ${BGFX_DIR}/src/glcontext_ppapi.cpp PROPERTIES HEADER_FILE_ONLY ON )
 set_source_files_properties( ${BGFX_DIR}/src/glcontext_glx.cpp PROPERTIES HEADER_FILE_ONLY ON )
 set_source_files_properties( ${BGFX_DIR}/src/glcontext_egl.cpp PROPERTIES HEADER_FILE_ONLY ON )
diff --git a/cmake/ovr.cmake b/cmake/ovr.cmake
new file mode 100644
index 0000000..3854e9d
--- /dev/null
+++ b/cmake/ovr.cmake
@@ -0,0 +1,47 @@
+# bgfx.cmake - bgfx building in cmake
+# Written in 2016 by Joshua Brookover <josh@jalb.me>
+
+# To the extent possible under law, the author(s) have dedicated all copyright
+# and related and neighboring rights to this software to the public domain
+# worldwide. This software is distributed without any warranty.
+
+# You should have received a copy of the CC0 Public Domain Dedication along with
+# this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+# The ovr location is customizable via cache variable BGFX_OVR_DIR
+if( NOT BGFX_OVR_DIR )
+	set( BGFX_OVR_DIR "${CMAKE_CURRENT_SOURCE_DIR}/LibOVR" CACHE STRING "Location of LibOVR." )
+endif()
+
+# Ensure the directory exists
+if( NOT IS_DIRECTORY ${BGFX_OVR_DIR} )
+	message( SEND_ERROR "Could not load LibOVR, directory does not exist. ${BGFX_OVR_DIR}" )
+	return()
+endif()
+
+# Create the ovr target
+add_library( ovr INTERFACE )
+
+# Add include directory of ovr
+target_include_directories( ovr INTERFACE ${BGFX_OVR_DIR}/Include )
+
+# Add bgfx configuration define
+target_compile_definitions( ovr INTERFACE "BGFX_CONFIG_USE_OVR=1" )
+
+# Build system specific configurations
+if( CMAKE_SIZEOF_VOID_P EQUAL 8 )
+	set( ARCH "x64" )
+else()
+	set( ARCH "Win32" )
+endif()
+if( MSVC10 )
+	target_link_libraries( ovr INTERFACE ${BGFX_OVR_DIR}/Lib/Windows/${ARCH}/Release/VS2010/LibOVR.lib )
+elseif( MSVC11 )
+	target_link_libraries( ovr INTERFACE ${BGFX_OVR_DIR}/Lib/Windows/${ARCH}/Release/VS2012/LibOVR.lib )
+elseif( MSVC12 )
+	target_link_libraries( ovr INTERFACE ${BGFX_OVR_DIR}/Lib/Windows/${ARCH}/Release/VS2013/LibOVR.lib )
+elseif( MSVC14 )
+	target_link_libraries( ovr INTERFACE ${BGFX_OVR_DIR}/Lib/Windows/${ARCH}/Release/VS2015/LibOVR.lib )
+else()
+	message( STATUS "OVR not supported on this platform." )
+endif()