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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/x11_init.c
+143 -50
View File
@@ -1007,7 +1007,7 @@ static Cursor createHiddenCursor(void)
{
unsigned char pixels[16 * 16 * 4] = { 0 };
GLFWimage image = { 16, 16, pixels };
return _glfwCreateCursorX11(&image, 0, 0);
return _glfwCreateNativeCursorX11(&image, 0, 0);
}
// Create a helper window for IPC
@@ -1070,7 +1070,7 @@ void _glfwInputErrorX11(int error, const char* message)
// Creates a native cursor object from the specified image and hotspot
//
Cursor _glfwCreateCursorX11(const GLFWimage* image, int xhot, int yhot)
Cursor _glfwCreateNativeCursorX11(const GLFWimage* image, int xhot, int yhot)
{
int i;
Cursor cursor;
@@ -1109,8 +1109,92 @@ Cursor _glfwCreateCursorX11(const GLFWimage* image, int xhot, int yhot)
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
int _glfwPlatformInit(void)
GLFWbool _glfwConnectX11(int platformID, _GLFWplatform* platform)
{
const _GLFWplatform x11 =
{
GLFW_PLATFORM_X11,
_glfwInitX11,
_glfwTerminateX11,
_glfwGetCursorPosX11,
_glfwSetCursorPosX11,
_glfwSetCursorModeX11,
_glfwSetRawMouseMotionX11,
_glfwRawMouseMotionSupportedX11,
_glfwCreateCursorX11,
_glfwCreateStandardCursorX11,
_glfwDestroyCursorX11,
_glfwSetCursorX11,
_glfwGetScancodeNameX11,
_glfwGetKeyScancodeX11,
_glfwSetClipboardStringX11,
_glfwGetClipboardStringX11,
#if defined(__linux__)
_glfwInitJoysticksLinux,
_glfwTerminateJoysticksLinux,
_glfwPollJoystickLinux,
_glfwGetMappingNameLinux,
_glfwUpdateGamepadGUIDLinux,
#else
_glfwInitJoysticksNull,
_glfwTerminateJoysticksNull,
_glfwPollJoystickNull,
_glfwGetMappingNameNull,
_glfwUpdateGamepadGUIDNull,
#endif
_glfwFreeMonitorX11,
_glfwGetMonitorPosX11,
_glfwGetMonitorContentScaleX11,
_glfwGetMonitorWorkareaX11,
_glfwGetVideoModesX11,
_glfwGetVideoModeX11,
_glfwGetGammaRampX11,
_glfwSetGammaRampX11,
_glfwCreateWindowX11,
_glfwDestroyWindowX11,
_glfwSetWindowTitleX11,
_glfwSetWindowIconX11,
_glfwGetWindowPosX11,
_glfwSetWindowPosX11,
_glfwGetWindowSizeX11,
_glfwSetWindowSizeX11,
_glfwSetWindowSizeLimitsX11,
_glfwSetWindowAspectRatioX11,
_glfwGetFramebufferSizeX11,
_glfwGetWindowFrameSizeX11,
_glfwGetWindowContentScaleX11,
_glfwIconifyWindowX11,
_glfwRestoreWindowX11,
_glfwMaximizeWindowX11,
_glfwShowWindowX11,
_glfwHideWindowX11,
_glfwRequestWindowAttentionX11,
_glfwFocusWindowX11,
_glfwSetWindowMonitorX11,
_glfwWindowFocusedX11,
_glfwWindowIconifiedX11,
_glfwWindowVisibleX11,
_glfwWindowMaximizedX11,
_glfwWindowHoveredX11,
_glfwFramebufferTransparentX11,
_glfwGetWindowOpacityX11,
_glfwSetWindowResizableX11,
_glfwSetWindowDecoratedX11,
_glfwSetWindowFloatingX11,
_glfwSetWindowOpacityX11,
_glfwSetWindowMousePassthroughX11,
_glfwPollEventsX11,
_glfwWaitEventsX11,
_glfwWaitEventsTimeoutX11,
_glfwPostEmptyEventX11,
_glfwGetEGLPlatformX11,
_glfwGetEGLNativeDisplayX11,
_glfwGetEGLNativeWindowX11,
_glfwGetRequiredInstanceExtensionsX11,
_glfwGetPhysicalDevicePresentationSupportX11,
_glfwCreateWindowSurfaceX11,
};
// HACK: If the application has left the locale as "C" then both wide
// character text input and explicit UTF-8 input via XIM will break
// This sets the CTYPE part of the current locale from the environment
@@ -1119,16 +1203,67 @@ int _glfwPlatformInit(void)
setlocale(LC_CTYPE, "");
#if defined(__CYGWIN__)
_glfw.x11.xlib.handle = _glfwPlatformLoadModule("libX11-6.so");
void* module = _glfwPlatformLoadModule("libX11-6.so");
#else
_glfw.x11.xlib.handle = _glfwPlatformLoadModule("libX11.so.6");
void* module = _glfwPlatformLoadModule("libX11.so.6");
#endif
if (!_glfw.x11.xlib.handle)
if (!module)
{
_glfwInputError(GLFW_PLATFORM_ERROR, "X11: Failed to load Xlib");
if (platformID == GLFW_PLATFORM_X11)
_glfwInputError(GLFW_PLATFORM_ERROR, "X11: Failed to load Xlib");
return GLFW_FALSE;
}
PFN_XInitThreads XInitThreads = (PFN_XInitThreads)
_glfwPlatformGetModuleSymbol(module, "XInitThreads");
PFN_XrmInitialize XrmInitialize = (PFN_XrmInitialize)
_glfwPlatformGetModuleSymbol(module, "XrmInitialize");
PFN_XOpenDisplay XOpenDisplay = (PFN_XOpenDisplay)
_glfwPlatformGetModuleSymbol(module, "XOpenDisplay");
if (!XInitThreads || !XrmInitialize || !XOpenDisplay)
{
if (platformID == GLFW_PLATFORM_X11)
_glfwInputError(GLFW_PLATFORM_ERROR, "X11: Failed to load Xlib entry point");
_glfwPlatformFreeModule(module);
return GLFW_FALSE;
}
XInitThreads();
XrmInitialize();
Display* display = XOpenDisplay(NULL);
if (!display)
{
if (platformID == GLFW_PLATFORM_X11)
{
const char* name = getenv("DISPLAY");
if (name)
{
_glfwInputError(GLFW_PLATFORM_UNAVAILABLE,
"X11: Failed to open display %s", name);
}
else
{
_glfwInputError(GLFW_PLATFORM_UNAVAILABLE,
"X11: The DISPLAY environment variable is missing");
}
}
_glfwPlatformFreeModule(module);
return GLFW_FALSE;
}
_glfw.x11.display = display;
_glfw.x11.xlib.handle = module;
*platform = x11;
return GLFW_TRUE;
}
int _glfwInitX11(void)
{
_glfw.x11.xlib.AllocClassHint = (PFN_XAllocClassHint)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XAllocClassHint");
_glfw.x11.xlib.AllocSizeHints = (PFN_XAllocSizeHints)
@@ -1217,8 +1352,6 @@ int _glfwPlatformInit(void)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XGrabPointer");
_glfw.x11.xlib.IconifyWindow = (PFN_XIconifyWindow)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XIconifyWindow");
_glfw.x11.xlib.InitThreads = (PFN_XInitThreads)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XInitThreads");
_glfw.x11.xlib.InternAtom = (PFN_XInternAtom)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XInternAtom");
_glfw.x11.xlib.LookupString = (PFN_XLookupString)
@@ -1233,8 +1366,6 @@ int _glfwPlatformInit(void)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XMoveWindow");
_glfw.x11.xlib.NextEvent = (PFN_XNextEvent)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XNextEvent");
_glfw.x11.xlib.OpenDisplay = (PFN_XOpenDisplay)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XOpenDisplay");
_glfw.x11.xlib.OpenIM = (PFN_XOpenIM)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XOpenIM");
_glfw.x11.xlib.PeekEvent = (PFN_XPeekEvent)
@@ -1323,8 +1454,6 @@ int _glfwPlatformInit(void)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XrmGetResource");
_glfw.x11.xrm.GetStringDatabase = (PFN_XrmGetStringDatabase)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XrmGetStringDatabase");
_glfw.x11.xrm.Initialize = (PFN_XrmInitialize)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XrmInitialize");
_glfw.x11.xrm.UniqueQuark = (PFN_XrmUniqueQuark)
_glfwPlatformGetModuleSymbol(_glfw.x11.xlib.handle, "XrmUniqueQuark");
_glfw.x11.xlib.UnregisterIMInstantiateCallback = (PFN_XUnregisterIMInstantiateCallback)
@@ -1337,27 +1466,6 @@ int _glfwPlatformInit(void)
if (_glfw.x11.xlib.utf8LookupString && _glfw.x11.xlib.utf8SetWMProperties)
_glfw.x11.xlib.utf8 = GLFW_TRUE;
XInitThreads();
XrmInitialize();
_glfw.x11.display = XOpenDisplay(NULL);
if (!_glfw.x11.display)
{
const char* display = getenv("DISPLAY");
if (display)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"X11: Failed to open display %s", display);
}
else
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"X11: The DISPLAY environment variable is missing");
}
return GLFW_FALSE;
}
_glfw.x11.screen = DefaultScreen(_glfw.x11.display);
_glfw.x11.root = RootWindow(_glfw.x11.display, _glfw.x11.screen);
_glfw.x11.context = XUniqueContext();
@@ -1385,7 +1493,7 @@ int _glfwPlatformInit(void)
return GLFW_TRUE;
}
void _glfwPlatformTerminate(void)
void _glfwTerminateX11(void)
{
if (_glfw.x11.helperWindowHandle)
{
@@ -1479,18 +1587,3 @@ void _glfwPlatformTerminate(void)
}
}
const char* _glfwPlatformGetVersionString(void)
{
return _GLFW_VERSION_NUMBER " X11 GLX EGL OSMesa"
#if defined(_POSIX_MONOTONIC_CLOCK)
" monotonic"
#endif
#if defined(__linux__)
" evdev"
#endif
#if defined(_GLFW_BUILD_DLL)
" shared"
#endif
;
}