This is currently supported on Linux and macOS. iOS and Android are not
supported at all, Windows support could be added with some changes to the libusb
backend. The Visual Studio and Xcode projects do not use this feature.
Based on Valve Software's hid.cpp, written in collaboration with Andrew Eikum.
Braden Obrzut
https://hg.libsdl.org/SDL/file/7dc39b047055/CMakeLists.txt#l911
I believe the following should also be specified there:
set(SDL_VIDEO_OPENGL_ES 1)
set(SDL_VIDEO_RENDER_OGL_ES 1)
As it is now GLES1 support is missing when building for Android despite it linking to the library.
Ozkan Sezer
A horde of strict aliasing violation warnings are emitted from joystick
layer, and also from a few other places. This happens with gcc-4.4.7 on
Linux CentOS 6.10. Some other sysjoystick would possibly have the same
warnings.
Attached my full log here. Example entry:
src/joystick/SDL_joystick.c: In function 'SDL_GetJoystickGUIDInfo':
src/joystick/SDL_joystick.c:1094: warning: dereferencing pointer '({anonymous})' does break strict-aliasing rules
tschwinger
Respect the BUILD_SHARED_LIBS variable when defined, and build either shared or static libs, which is CMake's default behavior (See https://cmake.org/cmake/help/latest/variable/BUILD_SHARED_LIBS.html).
If the variable is not defined, the current behavior remains unchanged and both variants are built where the platform supports it. This way, it remains possible to build both in one shot, which seems convenient for distro builds and useful to promote some consistency between them.
tschwinger
Followup to #3651
As already noted by Ryan, no framework is being built, so we better install to lib/cmake.
That code was originally part of a patch submitted by David Demelier, whose credit BTW got lost (I combined his patch for #3572 with fixes for #2576 and #3613 resulting in #3651 because things started to depend on another).
I tested that the configuration files are found correctly in the new location on MacOS X based on a hint to the root (see https://cmake.org/cmake/help/latest/command/find_package.html#search-procedure).
Manuel Sabogal
I noticed that the current Android.mk builds a libhidapi.so library for Android but the CMake build hasn't been updated to do so. I'll attach a patch that fixes this issue.
This lets you build a custom embedded device that roughly offers the "this
process is going to the background NOW" semantics of SDL on a mobile device.
From Tom Black:
I'm having problems initializing the sensor module. I'm compiling with a standard ./configure && make && sudo make install, and the module says it's enabled, but SDL_Init(SDL_INIT_EVERYTHING) is failing with SDL_GetError() returning "SDL not built with sensor support".
Author: Micha? Janiszewski <janisozaur+signed@gmail.com>
Date: Fri Sep 28 20:38:04 2018 +0200
CMake: fix building tests on Linux
In case where libunwind.h has been found, it will be used by compiler,
but linker wasn't updated to reflect use of this new library.
add HAVE_ENDPOINTVOLUME_H, HAVE_MMDEVICEAPI_H and HAVE_AUDIOCLIENT_H
in SDL_config.h.in, SDL_config.h.cmake, SDL_config_windows.h, and in
SDL_config_winrt.h.
Wayde Reitsma
After attempting to use SDL2 in the way described in this bug, I found the main issue was the includes not being added to the compiler command.
I found the issue was that the target_include_directories commands for the SDL2, SDL2-static and SDL2main targets only sets the public includes for installations using the INSTALL_INTERFACE generator expression.
I have written a patch to CMakeLists.txt that fixes this issue by adding another item to the target_include_directories commands, utilizing the BUILD_INTERFACE generator expression to correctly add the include directory during builds.
Previously the include path was {INSTALL_PREFIX}/include,
it is now {INSTALL_PREFIX}/include/SDL2 to be consistent with
the other build and package configuration systems.
Fixes#4128.
Eric Wasylishen
Patch to support building the tests with cmake.
Disabled by default, use: "cmake .. -DSDL_TEST=YES" to enable the tests.
Tested on macOS 10.13 with the ninja, makefile, and Xcode generators, and Windows 10 with the Visual Studio 2017 generator.
XAudio2 doesn't have capture support, so WASAPI was to replace it; the holdout
was WinRT, which still needed it as its primary audio target until the WASAPI
code code be made to work.
The support matrix now looks like:
WinXP: directsound by default, winmm as a fallback for buggy drivers.
Vista+: WASAPI (directsound and winmm as fallbacks for debugging).
WinRT: WASAPI
Andrey
Seems latest google angle library successfully built & tested under macOS'es.
https://github.com/google/angle
We need to use GLES2 to implement true cross-platform code.
Mate Nagy
There is a typo in CMakeLists.txt that makes CMake exit with failure.
Change that causes the problem: (Notice the double ending brackets)
${SDL2_SOURCE_DIR}/src/video/*.c)
+ ${SDL2_SOURCE_DIR}/src/video/yuv2rgb/*.c)
Fix:
Just remove the first ending bracket resulting in:
${SDL2_SOURCE_DIR}/src/video/*.c
${SDL2_SOURCE_DIR}/src/video/yuv2rgb/*.c)
New functions get and set the YUV colorspace conversion mode:
SDL_SetYUVConversionMode()
SDL_GetYUVConversionMode()
SDL_GetYUVConversionModeForResolution()
SDL_ConvertPixels() converts between all supported RGB and YUV formats, with SSE acceleration for converting from planar YUV formats (YV12, NV12, etc) to common RGB/RGBA formats.
Added a new test program, testyuv, to verify correctness and speed of YUV conversion functionality.
Ozkan Sezer
In my cross-build environment with cmake-2.8.12.1, cmake does not add
SDL_coreaudio.m to its makefiles and the result is a failure. The fix
is simple: set the language to C for it as it is done at other places
in CMakeLists.txt.
