MapleShrine/mkxp
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Eliminate GLEW dependency

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GL entrypoint resolution is now done manually. This has a couple
immediate benefits, such as not having to retrieve hundreds of
functions pointers that we'll never use. It's also nice to have
an exact overview of all the entrypoints used by mkxp.

This change allows mkxp to run fine with core contexts, not sure
how relevant that is going to be in the future.

What's noteworthy is that  _all_ entrypoints, even the ones core
in 1.1 and guaranteed to be in every libGL, are resolved
dynamically.
This has the added benefit of not having to link directly against
libGL anymore, which also cleans up the output of `ldd` quite
a bit (SDL2 loads most system deps dynamically at runtime).

GL headers are still required at build time.
This commit is contained in:
Jonas Kulla 2014-05-30 23:01:35 +02:00
parent 640b01e518
commit 6c481e5eb8
16 changed files with 470 additions and 272 deletions
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7
CMakeLists.txt
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@ -84,10 +84,8 @@ pkg_check_modules(SDL2_TTF REQUIRED SDL2_ttf)
pkg_check_modules(SDL2_IMAGE REQUIRED SDL2_image)
pkg_check_modules(SDL_SOUND REQUIRED SDL_sound)
find_package(GLEW 1.9.0 REQUIRED)
find_package(Boost 1.49 COMPONENTS program_options REQUIRED)
find_package(OpenAL REQUIRED)
find_package(OpenGL REQUIRED)
find_package(ZLIB REQUIRED)
## Setup main source ##
@ -135,6 +133,7 @@ set(MAIN_HEADERS
src/al-util.h
src/boost-hash.h
src/debugwriter.h
src/gl-fun.h
)
set(MAIN_SOURCE
@ -164,6 +163,7 @@ set(MAIN_SOURCE
src/tileatlas.cpp
src/perftimer.cpp
src/sharedstate.cpp
src/gl-fun.cpp
)
source_group("MKXP Source" FILES ${MAIN_SOURCE} ${MAIN_HEADERS})
@ -352,7 +352,6 @@ target_include_directories(${PROJECT_NAME} PRIVATE
${PHYSFS_INCLUDE_DIRS}
${SDL2_INCLUDE_DIRS} # Blindly assume other SDL bits are in same directory
${Boost_INCLUDE_DIR}
${GLEW_INCLUDE_DIR}/GL
${MRI_INCLUDE_DIRS}
${OPENAL_INCLUDE_DIR}
)
@ -368,8 +367,6 @@ target_link_libraries(${PROJECT_NAME}
${Boost_LIBRARIES}
${MRI_LIBRARIES}
${OPENAL_LIBRARY}
${OPENGL_gl_LIBRARY}
${GLEW_LIBRARY}
${ZLIB_LIBRARY}
${PLATFORM_LIBRARIES}