Configure Doxyfile according to the value of USE_OPENGL variable.

Docs/Doxyfile.in

@@ -717,7 +717,7 @@ EXCLUDE_SYMLINKS       = NO
 
 EXCLUDE_PATTERNS       = */*API*.cpp \
                          */*API*.h \
-                         */OpenGL/*
+                         */@EXCLUDE_GRAPHICS_API@/*
 
 # The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names 
 # (namespaces, classes, functions, etc.) that should be excluded from the 

Source/CMakeLists.txt

@@ -179,6 +179,17 @@ if (NOT URHO3D_BUILD_TYPE STREQUAL URHO3D_EXPORTS_BUILD_TYPE OR ${CMAKE_SOURCE_D
     configure_file (${CMAKE_SOURCE_DIR}/Engine/Urho3D.h.in ${CMAKE_BINARY_DIR}/Engine/Urho3D.h) 
 endif ()
 
+# Generate platform specific Doxyfile automatically
+if (NOT USE_OPENGL EQUAL DOXYFILE_USE_OPENGL OR ${PROJECT_ROOT_DIR}/Docs/Doxyfile.in IS_NEWER_THAN ${PROJECT_ROOT_DIR}/Doxyfile)
+    set (DOXYFILE_USE_OPENGL ${USE_OPENGL} CACHE INTERNAL "USE_OPENGL flag when Doxyfile was last generated")
+    if (USE_OPENGL)
+        set (EXCLUDE_GRAPHICS_API Direct3D9)
+    else ()
+        set (EXCLUDE_GRAPHICS_API OpenGL)
+    endif ()
+    configure_file (${PROJECT_ROOT_DIR}/Docs/Doxyfile.in ${PROJECT_ROOT_DIR}/Doxyfile) 
+endif ()
+
 # Reference supported build options that are potentially not being referenced due to platform or build type branching to suppress "unused variable" warning
 if (ENABLE_SAMPLES AND ENABLE_EXTRAS AND ENABLE_TOOLS AND ENABLE_MINIDUMPS AND ENABLE_SAFE_LUA AND USE_MKLINK AND USE_STATIC_RUNTIME AND SCP_TO_TARGET AND ANDROID_ABI)
 endif()

cmake_android.bat

@@ -46,6 +46,5 @@ if "%use_mklink%" == "1" (
     if exist android-Build\CMakeCache.txt. del /F android-Build\CMakeCache.txt
     if exist android-Build\CMakeFiles. rd /S /Q android-Build\CMakeFiles
 ) 
-cmake -E copy_if_different Docs\Doxyfile.in Doxyfile
 echo on
 cmake -E chdir %build% cmake -G "Unix Makefiles" -DANDROID=1 -DCMAKE_TOOLCHAIN_FILE=%source%\CMake\Toolchains\android.toolchain.cmake -DLIBRARY_OUTPUT_PATH_ROOT=.  %* %source%

cmake_gcc.sh

@@ -119,9 +119,6 @@ msg "Native build" && cmake -E chdir Build cmake $OPT -G $GENERATOR $PLATFORM $@
 [ $ANDROID_NDK ] && msg "Android build" && cmake -E chdir android-Build cmake $OPT -G $GENERATOR -DANDROID=1 -DCMAKE_TOOLCHAIN_FILE=$SOURCE/CMake/Toolchains/android.toolchain.cmake -DLIBRARY_OUTPUT_PATH_ROOT=. $@ $SOURCE && post_cmake android-Build
 unset IFS
 
-# Assume GCC user uses OpenGL, comment out below sed if this is not true
-sed 's/OpenGL/Direct3D9/g' Docs/Doxyfile.in >Doxyfile
-
 # Create symbolic links in the build directories
 if [ $ANDROID_NDK ]; then
     for dir in CoreData Data; do

cmake_macosx.sh

@@ -34,9 +34,6 @@ cmake -E make_directory $BUILD
 # Create project with the Xcode generator
 cmake -E chdir $BUILD cmake -G "Xcode" $@ $SOURCE
 
-# Apple always uses OpenGL
-sed 's/OpenGL/Direct3D9/g' Docs/Doxyfile.in >Doxyfile
-
 if [ $1 == "-DIOS=1" ]; then
     # Due to a bug in the CMake/Xcode generator where it has wrongly assumed the IOS bundle structure to be the same as MacOSX bundle structure,
     # below temporary fix is required in order to solve the auto-linking issue when dependent libraries are changed

cmake_mingw.bat

@@ -22,6 +22,5 @@
 
 @echo off
 cmake -E make_directory Build
-cmake -E copy_if_different Docs\Doxyfile.in Doxyfile
 echo on
 cmake -E chdir Build cmake -G "MinGW Makefiles" %* ..\Source

cmake_vs2008.bat

@@ -32,6 +32,5 @@ if not "%1" == "" (
     shift
     goto loop
 )
-cmake -E copy_if_different Docs\Doxyfile.in Doxyfile
 echo on
 cmake -E chdir Build cmake -G "Visual Studio %version%%arch%" %* ..\Source