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Moved GL version check out of FindGLEW.cmake

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This allows us to make use of this even when
we are not using GLEW.
This commit is contained in:
David G Yu 2020-03-03 15:04:24 -08:00
parent b738fa1225
commit 16a5c3993f
2 changed files with 30 additions and 22 deletions
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30
CMakeLists.txt
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@ -428,6 +428,36 @@ if(GLEW_FOUND)
add_definitions( -DOSD_USES_GLEW ) add_definitions( -DOSD_USES_GLEW )
endif() endif()
macro(osd_detect_gl_version header)
if (EXISTS "${header}")
file(STRINGS "${header}" VERSION_4_2 REGEX "^#define GL_VERSION_4_2.*$")
if (VERSION_4_2)
set(OPENGL_4_2_FOUND TRUE)
else ()
message(WARNING "OpenGL 4.2 dependent features not enabled")
endif ()
file(STRINGS "${header}" VERSION_4_3 REGEX "^#define GL_VERSION_4_3.*$")
if (VERSION_4_3)
SET(OPENGL_4_3_FOUND TRUE)
else ()
message(WARNING "OpenGL 4.3 dependent features not enabled")
endif ()
endif ()
endmacro()
if(GLEW_FOUND AND GLEW_INCLUDE_DIR)
osd_detect_gl_version(${GLEW_INCLUDE_DIR}/GL/glew.h)
elseif(OPENGL_FOUND AND OPENGL_INCLUDE_DIR)
osd_detect_gl_version(${OPENGL_INCLUDE_DIR}/GL/glext.h)
endif()
# note : (GLSL transform feedback kernels require GL 4.2) # note : (GLSL transform feedback kernels require GL 4.2)
if(GLEW_FOUND AND OPENGL_4_2_FOUND) if(GLEW_FOUND AND OPENGL_4_2_FOUND)
add_definitions( add_definitions(

22
cmake/FindGLEW.cmake
View File

@ -100,28 +100,6 @@ if (${CMAKE_HOST_UNIX})
DOC "The GLEW library") DOC "The GLEW library")
endif () endif ()
if (GLEW_INCLUDE_DIR AND EXISTS "${GLEW_INCLUDE_DIR}/GL/glew.h")
file(STRINGS "${GLEW_INCLUDE_DIR}/GL/glew.h" GLEW_4_2 REGEX "^#define GL_VERSION_4_2.*$")
if (GLEW_4_2)
set(OPENGL_4_2_FOUND TRUE)
else ()
message(WARNING
"glew-1.7.0 or newer needed for supporting OpenGL 4.2 dependent features"
)
endif ()
file(STRINGS "${GLEW_INCLUDE_DIR}/GL/glew.h" GLEW_4_3 REGEX "^#define GL_VERSION_4_3.*$")
if (GLEW_4_3)
SET(OPENGL_4_3_FOUND TRUE)
else ()
message(WARNING
"glew-1.9.0 or newer needed for supporting OpenGL 4.3 dependent features"
)
endif ()
endif ()
find_package_handle_standard_args(GLEW find_package_handle_standard_args(GLEW
REQUIRED_VARS REQUIRED_VARS
GLEW_INCLUDE_DIR GLEW_INCLUDE_DIR