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Add runtime platform selection

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This adds compile-time support for multiple platforms and runtime
detection of them.  Window system related platform functions are now
called from shared code via the function pointer struct _GLFWplatform.

The timer, thread and module loading platform functions are still called
directly by name and the implementation chosen at link-time.  These
functions are the same for any backend on a given OS, including the Null
backend.

The platforms are now enabled via CMake dependent options following the
GLFW_BUILD_<platform> pattern instead of a mix of automagic and ad-hoc
option names.  There is no longer any option for the Null backend as it
is now always enabled.

Much of the struct stitching work in platform.h was based on an earlier
experimental branch for runtime platform selection by @ronchaine.

Every platform function related to windows, contexts, monitors, input,
event processing and Vulkan have been renamed so that multiple sets of
them can exist without colliding.  Calls to these are now routed through
the _glfw.platform struct member.  These changes makes up most of this
commit.

For Wayland and X11 the client library loading and display creation is
used to detect a running compositor/server.  The XDG_SESSION_TYPE
environment variable is ignored for now, as X11 is still by far the more
complete implementation.

Closes #1655
Closes #1958
This commit is contained in:
Camilla Löwy
2021-07-13 21:50:09 +02:00
parent ff9d9515f6
commit 56a4cb0a3a
56 changed files with 2698 additions and 1235 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/CMakeLists.txt
+51 -52
View File
@@ -2,8 +2,23 @@
add_library(glfw ${GLFW_LIBRARY_TYPE}
"${GLFW_SOURCE_DIR}/include/GLFW/glfw3.h"
"${GLFW_SOURCE_DIR}/include/GLFW/glfw3native.h"
internal.h mappings.h context.c init.c input.c monitor.c
vulkan.c window.c)
internal.h platform.h mappings.h
context.c init.c input.c monitor.c platform.c vulkan.c window.c
egl_context.c osmesa_context.c null_platform.h null_joystick.h
null_init.c null_monitor.c null_window.c null_joystick.c)
# The time, thread and module code is shared between all backends on a given OS,
# including the null backend, which still needs those bits to be functional
if (APPLE)
target_sources(glfw PRIVATE cocoa_time.h cocoa_time.c posix_thread.h
posix_module.c posix_thread.c)
elseif (WIN32)
target_sources(glfw PRIVATE win32_time.h win32_thread.h win32_module.c
win32_time.c win32_thread.c)
else()
target_sources(glfw PRIVATE posix_time.h posix_thread.h posix_module.c
posix_time.c posix_thread.c)
endif()
add_custom_target(update_mappings
COMMAND "${CMAKE_COMMAND}" -P "${GLFW_SOURCE_DIR}/CMake/GenerateMappings.cmake" mappings.h.in mappings.h
@@ -14,56 +29,40 @@ add_custom_target(update_mappings
set_target_properties(update_mappings PROPERTIES FOLDER "GLFW3")
if (_GLFW_COCOA)
if (GLFW_BUILD_COCOA)
target_compile_definitions(glfw PRIVATE _GLFW_COCOA)
target_sources(glfw PRIVATE cocoa_platform.h cocoa_joystick.h cocoa_time.h
posix_thread.h cocoa_init.m cocoa_joystick.m
cocoa_monitor.m cocoa_window.m cocoa_time.c
posix_thread.c nsgl_context.m egl_context.c
osmesa_context.c)
elseif (_GLFW_WIN32)
target_sources(glfw PRIVATE cocoa_platform.h cocoa_joystick.h cocoa_init.m
cocoa_joystick.m cocoa_monitor.m cocoa_window.m
nsgl_context.m)
endif()
if (GLFW_BUILD_WIN32)
target_compile_definitions(glfw PRIVATE _GLFW_WIN32)
target_sources(glfw PRIVATE win32_platform.h win32_joystick.h win32_time.h
win32_thread.h win32_init.c win32_joystick.c
win32_monitor.c win32_time.c win32_thread.c
win32_window.c wgl_context.c egl_context.c
osmesa_context.c)
elseif (_GLFW_X11)
target_sources(glfw PRIVATE win32_platform.h win32_joystick.h win32_init.c
win32_joystick.c win32_monitor.c win32_window.c
wgl_context.c)
endif()
if (GLFW_BUILD_X11)
target_compile_definitions(glfw PRIVATE _GLFW_X11)
target_sources(glfw PRIVATE x11_platform.h xkb_unicode.h posix_time.h
posix_thread.h x11_init.c x11_monitor.c
x11_window.c xkb_unicode.c posix_time.c
posix_thread.c glx_context.c egl_context.c
osmesa_context.c)
elseif (_GLFW_WAYLAND)
target_sources(glfw PRIVATE x11_platform.h xkb_unicode.h x11_init.c
x11_monitor.c x11_window.c xkb_unicode.c
glx_context.c)
endif()
if (GLFW_BUILD_WAYLAND)
target_compile_definitions(glfw PRIVATE _GLFW_WAYLAND)
target_sources(glfw PRIVATE wl_platform.h posix_time.h posix_thread.h
xkb_unicode.h wl_init.c wl_monitor.c wl_window.c
posix_time.c posix_thread.c xkb_unicode.c
egl_context.c osmesa_context.c)
elseif (_GLFW_OSMESA)
target_compile_definitions(glfw PRIVATE _GLFW_OSMESA)
target_sources(glfw PRIVATE null_platform.h null_joystick.h posix_time.h
posix_thread.h null_init.c null_monitor.c
null_window.c null_joystick.c posix_time.c
posix_thread.c egl_context.c osmesa_context.c)
target_sources(glfw PRIVATE wl_platform.h xkb_unicode.h wl_init.c
wl_monitor.c wl_window.c xkb_unicode.c)
endif()
if (WIN32)
target_sources(glfw PRIVATE win32_module.c)
else()
target_sources(glfw PRIVATE posix_module.c)
endif()
if (_GLFW_X11 OR _GLFW_WAYLAND)
if (GLFW_BUILD_X11 OR GLFW_BUILD_WAYLAND)
if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
target_sources(glfw PRIVATE linux_joystick.h linux_joystick.c)
else()
target_sources(glfw PRIVATE null_joystick.h null_joystick.c)
endif()
endif()
if (_GLFW_WAYLAND)
if (GLFW_BUILD_WAYLAND)
include(CheckIncludeFiles)
include(CheckFunctionExists)
check_include_files(xkbcommon/xkbcommon-compose.h HAVE_XKBCOMMON_COMPOSE_H)
@@ -161,11 +160,11 @@ if (GLFW_VULKAN_STATIC)
list(APPEND glfw_PKG_DEPS "vulkan")
endif()
if (_GLFW_WIN32)
if (GLFW_BUILD_WIN32)
list(APPEND glfw_PKG_LIBS "-lgdi32")
endif()
if (_GLFW_COCOA)
if (GLFW_BUILD_COCOA)
target_link_libraries(glfw PRIVATE "-framework Cocoa"
"-framework IOKit"
"-framework CoreFoundation")
@@ -174,7 +173,7 @@ if (_GLFW_COCOA)
set(glfw_PKG_LIBS "-framework Cocoa -framework IOKit -framework CoreFoundation")
endif()
if (_GLFW_WAYLAND)
if (GLFW_BUILD_WAYLAND)
pkg_check_modules(Wayland REQUIRED
wayland-client>=0.2.7
wayland-cursor>=0.2.7
@@ -192,7 +191,7 @@ if (_GLFW_WAYLAND)
endif()
endif()
if (_GLFW_X11)
if (GLFW_BUILD_X11)
find_package(X11 REQUIRED)
target_include_directories(glfw PRIVATE "${X11_X11_INCLUDE_PATH}")
@@ -251,11 +250,11 @@ endif()
# Make GCC warn about declarations that VS 2010 and 2012 won't accept for all
# source files that VS will build (Clang ignores this because we set -std=c99)
if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
set_source_files_properties(context.c init.c input.c monitor.c vulkan.c
window.c win32_init.c win32_joystick.c
win32_module.c win32_monitor.c win32_time.c win32_thread.c
win32_window.c wgl_context.c egl_context.c
osmesa_context.c PROPERTIES
set_source_files_properties(context.c init.c input.c monitor.c platform.c vulkan.c
window.c null_init.c null_joystick.c null_monitor.c
null_window.c win32_init.c win32_joystick.c win32_module.c
win32_monitor.c win32_time.c win32_thread.c win32_window.c
wgl_context.c egl_context.c osmesa_context.c PROPERTIES
COMPILE_FLAGS -Wdeclaration-after-statement)
endif()
@@ -276,7 +275,7 @@ elseif (CMAKE_C_COMPILER_ID STREQUAL "GNU" OR
target_compile_options(glfw PRIVATE "-Wall")
endif()
if (_GLFW_WIN32)
if (GLFW_BUILD_WIN32)
target_compile_definitions(glfw PRIVATE UNICODE _UNICODE)
endif()
@@ -318,7 +317,7 @@ if (MSVC90)
endif()
# Workaround for -std=c99 on Linux disabling _DEFAULT_SOURCE (POSIX 2008 and more)
if (_GLFW_X11 OR _GLFW_WAYLAND OR _GLFW_OSMESA)
if (GLFW_BUILD_X11 OR GLFW_BUILD_WAYLAND)
if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
target_compile_definitions(glfw PRIVATE _DEFAULT_SOURCE)
endif()