1 files changed, 65 insertions, 0 deletions
diff --git a/Source/cmake/FindOpenGL.cmake b/Source/cmake/FindOpenGL.cmake
new file mode 100644
index 000000000..60721cdb9
--- /dev/null
+++ b/Source/cmake/FindOpenGL.cmake
@@ -0,0 +1,65 @@
+# - Try to Find OpenGL
+# Once done, this will define
+#
+#  OPENGL_FOUND - system has OpenGL installed.
+#  OPENGL_INCLUDE_DIRS - directories which contain the OpenGL headers.
+#  OPENGL_LIBRARIES - libraries required to link against OpenGL.
+#  OPENGL_DEFINITIONS - Compiler switches required for using OpenGL.
+#
+# Copyright (C) 2015 Igalia S.L.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1.  Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+# 2.  Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND ITS CONTRIBUTORS ``AS
+# IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR ITS
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+find_package(PkgConfig)
+
+pkg_check_modules(PC_OPENGL gl)
+
+if (PC_OPENGL_FOUND)
+    set(OPENGL_DEFINITIONS ${PC_OPENGL_CFLAGS_OTHER})
+endif ()
+
+find_path(OPENGL_INCLUDE_DIRS NAMES GL/gl.h
+    HINTS ${PC_OPENGL_INCLUDEDIR} ${PC_OPENGL_INCLUDE_DIRS}
+)
+
+set(OPENGL_NAMES ${OPENGL_NAMES} gl GL)
+find_library(OPENGL_LIBRARIES NAMES ${OPENGL_NAMES}
+    HINTS ${PC_OPENGL_LIBDIR} ${PC_OPENGL_LIBRARY_DIRS}
+)
+
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(OPENGL DEFAULT_MSG OPENGL_INCLUDE_DIRS OPENGL_LIBRARIES)
+
+mark_as_advanced(OPENGL_INCLUDE_DIRS OPENGL_LIBRARIES)
+
+if (OPENGL_FOUND)
+    # We don't use find_package for GLX because it is part of -lGL, unlike EGL. We need to
+    # have OPENGL_INCLUDE_DIRS as part of the directories check_include_files() looks for in
+    # case OpenGL is installed into a non-standard location.
+    include(CMakePushCheckState)
+    CMAKE_PUSH_CHECK_STATE()
+    set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} ${OPENGL_INCLUDE_DIRS})
+    include(CheckIncludeFiles)
+    check_include_files("GL/glx.h" GLX_FOUND)
+    CMAKE_POP_CHECK_STATE()
+endif ()