Comments (18)
ArEnSc
commented on April 28, 2024
Hey I would be down to help you out with this. This can further help me get my feet wet with this project =)
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ArEnSc
commented on April 28, 2024
So do windowless context's allow this to happen? I am guessing its more prominently used for GUI kits if anything ? http://www.ecere.com/wordpress/wp-content/uploads/2007/11/argb.png
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mosra
commented on April 28, 2024
Windowless application does not create a window, which means it can't respond to keyboard or mouse events or draw anything on the screen. The image you posted is (as far as I can tell) just an borderless transparent window.
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ArEnSc
commented on April 28, 2024
Okay so this is what I have so far.
I am going to integrate that into a WindowlessCglApplication.* in a bit.
I am having two issues
- The number of pixel formats returned for OpenGL 4.0 is 0 and context creation works without error.
Is this supposed to happen or is this an API bug ?
I tried OpenGL 3.2 it returns 2 formats and also creates the context without error.
The next issue is I am not sure how to modify your cmaketexts
These are my guesses.
else()
option(WITH_GLXAPPLICATION "Build GlxApplication library" OFF)
cmake_dependent_option(WITH_WINDOWLESSGLXAPPLICATION "Build WindowlessGlxApplication library" OFF "NOT WITH_MAGNUMINFO;NOT WITH_DISTANCEFIELDCONVERTER" ON)
cmake_dependent_option(WITH_XEGLAPPLICATION "Build XEglApplication library" OFF "TARGET_GLES" OFF)
cmake_dependent_option(WITH_GLUTAPPLICATION "Build GlutApplication library" OFF "NOT TARGET_GLES" OFF)
option(WITH_SDL2APPLICATION "Build Sdl2Application library" OFF)
option(WITH_WINDOWLESSCGLAPPLICATION "Build WindowlessCglApplication" OFF)
endif()
I know for a the compile flag I essentially need the osx opengl flag right?
# Windowless CGL application
if(WITH_WINDOWLESSCGLAPPLICATION)
add_library(MagnumWindowlessCglApplication STATIC WindowlessCglApplication.cpp)
set_target_properties(MagnumWindowlessGlxApplication PROPERTIES COMPILE_FLAGS ?)
install(FILES WindowlessGlxApplication.h DESTINATION ${MAGNUM_INCLUDE_INSTALL_DIR}/Platform)
install(TARGETS MagnumWindowlessGlxApplication
RUNTIME DESTINATION ${MAGNUM_BINARY_INSTALL_DIR}
LIBRARY DESTINATION ${MAGNUM_LIBRARY_INSTALL_DIR}
ARCHIVE DESTINATION ${MAGNUM_LIBRARY_INSTALL_DIR})
endif()
// Class variables
CGLContextObj context;
CGLPixelFormatObj pix;
/* Check version */
int nPix = 0;
GLint major, minor;
CGLGetVersion(&major, &minor);
if(major == 2 && minor < 1)
{
std::cout << "Platform::WindowlessCglApplication::tryCreateContext(): GL version 2.1 or greater is required";
return false;
}
CGLPixelFormatAttribute pfAttributesGL4[4] = {
kCGLPFAAccelerated,
kCGLPFAOpenGLProfile,
(CGLPixelFormatAttribute) kCGLOGLPVersion_GL4_Core,
(CGLPixelFormatAttribute) 0
};
CGLError cglError = CGLChoosePixelFormat(pfAttributesGL4,&pix,&nPix);
error(cglError);
if (cglError == kCGLBadPixelFormat)
{
std::cout << "Platform::WindowlessCglApplication::tryCreateContext(): GL version 4.0 has failed trying GL version 3.2" << std::endl;
CGLPixelFormatAttribute pfAttributesGL3_2[4] = {
kCGLPFAAccelerated,
kCGLPFAOpenGLProfile,
(CGLPixelFormatAttribute) kCGLOGLPVersion_3_2_Core,
(CGLPixelFormatAttribute) 0
};
cglError = CGLChoosePixelFormat(pfAttributesGL3_2,&pix,&nPix);
if (cglError == kCGLBadPixelFormat)
{
std::cout << "Platform::WindowlessCglApplication::tryCreateContext(): GL version 3.2 has failed trying GL version 3.0" << std::endl;
CGLPixelFormatAttribute pfAttributesGL3[4] = {
kCGLPFAAccelerated,
kCGLPFAOpenGLProfile,
(CGLPixelFormatAttribute) kCGLOGLPVersion_GL3_Core,
(CGLPixelFormatAttribute) 0
};
cglError = CGLChoosePixelFormat(pfAttributesGL3,&pix,&nPix);
if (cglError == kCGLBadPixelFormat)
{
std::cout << "Platform::WindowlessCglApplication::tryCreateContext(): GL version 3.0 has failed trying GL version Legacy" << std::endl;
CGLPixelFormatAttribute pfAttributesLegacy[4] = {
kCGLPFAAccelerated,
kCGLPFAOpenGLProfile,
(CGLPixelFormatAttribute) kCGLOGLPVersion_Legacy,
(CGLPixelFormatAttribute) 0
};
cglError = CGLChoosePixelFormat(pfAttributesLegacy,&pix,&nPix);
if(cglError == kCGLBadPixelFormat)
{
std::cout << "Platform::WindowlessCglApplication::tryCreateContext(): Context could not be created" << std::endl;
return false;
}
}
}
}
cglError = CGLCreateContext(pix, NULL, &context);
error(cglError);
cglError = CGLSetCurrentContext(context);
error(cglError);
std::cout << "Number of Pixel Formats " << nPix << std::endl;
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mosra
commented on April 28, 2024
To clarify things up:
Add new option into root CMakeLists.txt like this:
option(WITH_WINDOWLESSCGLAPPLICATION "Build WindowlessCglApplication library" OFF)
And add new block into src/Magnum/Platform/CMakeLists.txt:
# Windowless CGL application
if(WITH_WINDOWLESSCGLAPPLICATION)
add_library(MagnumWindowlessCglApplication STATIC WindowlessCglApplication.cpp)
install(FILES WindowlessCglApplication.h DESTINATION ${MAGNUM_INCLUDE_INSTALL_DIR}/Platform)
install(TARGETS MagnumWindowlessCglApplication
RUNTIME DESTINATION ${MAGNUM_BINARY_INSTALL_DIR}
LIBRARY DESTINATION ${MAGNUM_LIBRARY_INSTALL_DIR}
ARCHIVE DESTINATION ${MAGNUM_LIBRARY_INSTALL_DIR})
endif()
I'm not sure about the GL 4.0 issue, it might be a bug.
Thanks for the work!
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mosra
commented on April 28, 2024
You might also want to try compiling and running magnum-info to easily verify that everything works as expected. Modify lines 183-185 in src/Magnum/Platform/CMakeLists.txt to make use of the new WindowlessCglApplication library:
...
elseif(CORRADE_TARGET_NACL)
target_link_libraries(magnum-info MagnumWindowlessNaClApplication ppapi_cpp ppapi)
elseif(APPLE)
target_link_libraries(magnum-info MagnumWindowlessCglApplication ???)
else()
...
I don't know what exact libraries are needed to be linked (hence the ???). Then include proper header in src/Magnum/Platform/magnum-info.cpp (modify lines 44-48), e.g.:
#ifdef __APPLE__
#include "Magnum/Platform/WindowlessCglApplication.h"
#elif defined(CORRADE_TARGET_NACL)
#include "Magnum/Platform/WindowlessNaClApplication.h"
#else
#include "Magnum/Platform/WindowlessGlxApplication.h"
#endif
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ArEnSc
commented on April 28, 2024
for the ??? it requires the cocoa opengl-framework so do you have a previously existing flag that you want me to use like ${OSX_OPENGL}?
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mosra
commented on April 28, 2024
No, I don't have anything like that. Something like this might be enough (just a wild guess, though):
find_library(COCOA_FRAMEWORK Cocoa)
target_link_libraries(magnum-info MagnumWindowlessCglApplication ${COCOA_FRAMEWORK})
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ArEnSc
commented on April 28, 2024
Ill send the pull request sometime this week sorry for the delay there are a few other projects going on =D
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mosra
commented on April 28, 2024
Awesome, thank you! :-)
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epreston
commented on April 28, 2024
I noticed in @ArEnSc code above uses the kCGLOGLPVersion_GL4_Core constant. It appears that it hasn't been implemented yet. I ran into the same issue, it looks like we are supposed to use kCGLOGLPVersion_3_2_Core and query if we have a 3.3 or 4.1 context coming back.
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epreston
commented on April 28, 2024
I'm updating an offline renderer as well. :-)
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ArEnSc
commented on April 28, 2024
Sorry for the 2 month wait
Anyways
I took into consideration of what epreston said above.
Also I ran magnum-info
Determining if the function XOpenDisplay exists in the /opt/local/lib/libX11.dylib;/opt/local/lib/libXext.dylib failed with the following output:
Determining if the function dnet_ntoa exists in the dnet failed with the following output:
Determining if the function dnet_ntoa exists in the dnet_stub failed with the following output:
Determining if the function gethostbyname exists failed with the following output:
Determining if the function gethostbyname exists in the nsl failed with the following output:
Determining if the function gethostbyname exists in the bsd failed with the following output:
Determining if the function connect exists failed with the following output:
Determining if the function connect exists in the socket failed with the following output:
Determining if the function remove exists failed with the following output:
Determining if the function remove exists in the posix failed with the following output:
Determining if the function shmat exists failed with the following output:
Determining if the function shmat exists in the ipc failed with the following output:
there is this issue with it
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mosra
commented on April 28, 2024
This was output from magnum-info? From the XOpenDisplay string it looks like it is still using WindowlessGlxApplication instead of your new WindowlessCglApplication. Did you change the includes and linked the right libraries as I said above?
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ArEnSc
commented on April 28, 2024
I did link the libraries and perform the includes you said above.
#ifdef __APPLE__
#include "Magnum/Platform/WindowlessCglApplication.h"
#elif defined(CORRADE_TARGET_NACL)
#include "Magnum/Platform/WindowlessNaClApplication.h"
#else
#include "Magnum/Platform/WindowlessGlxApplication.h"
#endifif(WITH_MAGNUMINFO)
if(NOT UNIX AND NOT CORRADE_TARGET_NACL)
message(FATAL_ERROR "magnum-info is not available on this platform. Set WITH_MAGNUMINFO to OFF to skip building it.")
endif()
add_executable(magnum-info magnum-info.cpp)
if(UNIX AND NOT CORRADE_TARGET_NACL)
target_link_libraries(magnum-info MagnumWindowlessGlxApplication ${X11_LIBRARIES})
elseif(CORRADE_TARGET_NACL)
target_link_libraries(magnum-info MagnumWindowlessNaClApplication ppapi_cpp ppapi)
elseif(APPLE)
find_library(COCOA_FRAMEWORK Cocoa)
find_library(OpenGL_LIBRARY OpenGL)
target_link_libraries(magnum-info MagnumWindowlessCglApplication ${COCOA_LIBRARY} ${OpenGL_LIBRARY} )
endif()
target_link_libraries(magnum-info Magnum)
install(TARGETS magnum-info DESTINATION ${MAGNUM_BINARY_INSTALL_DIR})
if(CORRADE_TARGET_NACL)
install(FILES magnum-info-nacl.html DESTINATION ${MAGNUM_DATA_INSTALL_DIR} RENAME magnum-info.html)
install(FILES magnum-info-nacl.nmf DESTINATION ${MAGNUM_DATA_INSTALL_DIR} RENAME magnum-info.nmf)
endif()
endif()Info says this:
-- The C compiler identification is Clang 5.1.0
-- The CXX compiler identification is Clang 5.1.0
-- Found Corrade: /usr/lib/libCorradeUtility.dylib
-- Found OpenGL: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/OpenGL.framework
-- LIB_SUFFIX variable is not defined. It will be autodetected now.
-- You can set it manually with -DLIB_SUFFIX=<value> (64 for example)
-- LIB_SUFFIX autodetected as '', libraries will be installed into /usr/lib
-- Looking for XOpenDisplay in /opt/local/lib/libX11.dylib;/opt/local/lib/libXext.dylib
CMake Error at /opt/local/share/cmake-2.8/Modules/CMakeCInformation.cmake:37 (get_filename_component):
get_filename_component called with incorrect number of arguments
Call Stack (most recent call first):
CMakeLists.txt:3 (PROJECT)
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Looking for XOpenDisplay in /opt/local/lib/libX11.dylib;/opt/local/lib/libXext.dylib - not found
-- Looking for dnet_ntoa in dnet
CMake Error at /opt/local/share/cmake-2.8/Modules/CMakeCInformation.cmake:37 (get_filename_component):
get_filename_component called with incorrect number of arguments
Call Stack (most recent call first):
CMakeLists.txt:3 (PROJECT)
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Looking for dnet_ntoa in dnet - not found
-- Looking for dnet_ntoa in dnet_stub
CMake Error at /opt/local/share/cmake-2.8/Modules/CMakeCInformation.cmake:37 (get_filename_component):
get_filename_component called with incorrect number of arguments
Call Stack (most recent call first):
CMakeLists.txt:3 (PROJECT)
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Looking for dnet_ntoa in dnet_stub - not found
-- Looking for gethostbyname
CMake Error at /opt/local/share/cmake-2.8/Modules/CMakeCInformation.cmake:37 (get_filename_component):
get_filename_component called with incorrect number of arguments
Call Stack (most recent call first):
CMakeLists.txt:3 (PROJECT)
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Looking for gethostbyname - not found
-- Looking for gethostbyname in nsl
CMake Error at /opt/local/share/cmake-2.8/Modules/CMakeCInformation.cmake:37 (get_filename_component):
get_filename_component called with incorrect number of arguments
Call Stack (most recent call first):
CMakeLists.txt:3 (PROJECT)
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Looking for gethostbyname in nsl - not found
-- Looking for gethostbyname in bsd
CMake Error at /opt/local/share/cmake-2.8/Modules/CMakeCInformation.cmake:37 (get_filename_component):
get_filename_component called with incorrect number of arguments
Call Stack (most recent call first):
CMakeLists.txt:3 (PROJECT)
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Looking for gethostbyname in bsd - not found
-- Looking for connect
CMake Error at /opt/local/share/cmake-2.8/Modules/CMakeCInformation.cmake:37 (get_filename_component):
get_filename_component called with incorrect number of arguments
Call Stack (most recent call first):
CMakeLists.txt:3 (PROJECT)
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Looking for connect - not found
-- Looking for connect in socket
CMake Error at /opt/local/share/cmake-2.8/Modules/CMakeCInformation.cmake:37 (get_filename_component):
get_filename_component called with incorrect number of arguments
Call Stack (most recent call first):
CMakeLists.txt:3 (PROJECT)
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Looking for connect in socket - not found
-- Looking for remove
CMake Error at /opt/local/share/cmake-2.8/Modules/CMakeCInformation.cmake:37 (get_filename_component):
get_filename_component called with incorrect number of arguments
Call Stack (most recent call first):
CMakeLists.txt:3 (PROJECT)
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Looking for remove - not found
-- Looking for remove in posix
CMake Error at /opt/local/share/cmake-2.8/Modules/CMakeCInformation.cmake:37 (get_filename_component):
get_filename_component called with incorrect number of arguments
Call Stack (most recent call first):
CMakeLists.txt:3 (PROJECT)
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Looking for remove in posix - not found
-- Looking for shmat
CMake Error at /opt/local/share/cmake-2.8/Modules/CMakeCInformation.cmake:37 (get_filename_component):
get_filename_component called with incorrect number of arguments
Call Stack (most recent call first):
CMakeLists.txt:3 (PROJECT)
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Looking for shmat - not found
-- Looking for shmat in ipc
CMake Error at /opt/local/share/cmake-2.8/Modules/CMakeCInformation.cmake:37 (get_filename_component):
get_filename_component called with incorrect number of arguments
Call Stack (most recent call first):
CMakeLists.txt:3 (PROJECT)
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Looking for shmat in ipc - not found
-- Found X11: /opt/local/lib/libX11.dylib
-- Configuring incomplete, errors occurred!from magnum.
epreston
commented on April 28, 2024
In the cmake script, do the test for APPLE before the test for UNIX. Apple may be presented as a unix in cmake. My offline CGL renderer, uses frame buffer objects, part of the standard 3.0 and beyond. You will get a compatible forward context (3.3 or 4.1) when using the 3_2_Core constant.
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mosra
commented on April 28, 2024
Any progress with this? Or is here anybody else who could pick up what's already done and finish it? Thanks :)
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mosra
commented on April 28, 2024
Finished and merged in #59. Thank you for your work.
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Related Issues (20)
- Update vcpkg packages to include EmscriptenApplication on Emscripten HOT 2
- Failing to link Magnum::Math? HOT 3
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- undefined symbol: flextGLInit HOT 4
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