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Add support for XDG_SESSION_TYPE env variable

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Related to #2439
This commit is contained in:
Camilla Löwy
2024-02-15 20:55:28 +01:00
parent 690a15f929
commit 14e653358b
3 changed files with 27 additions and 0 deletions
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19
src/platform.c
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@@ -27,6 +27,9 @@
#include "internal.h"
#include <string.h>
#include <stdlib.h>
// These construct a string literal from individual numeric constants
#define _GLFW_CONCAT_VERSION(m, n, r) #m "." #n "." #r
#define _GLFW_MAKE_VERSION(m, n, r) _GLFW_CONCAT_VERSION(m, n, r)
@@ -80,6 +83,22 @@ GLFWbool _glfwSelectPlatform(int desiredID, _GLFWplatform* platform)
return GLFW_FALSE;
}
#if defined(_GLFW_WAYLAND) && defined(_GLFW_X11)
if (desiredID == GLFW_ANY_PLATFORM)
{
const char* const session = getenv("XDG_SESSION_TYPE");
if (session)
{
// Only follow XDG_SESSION_TYPE if it is set correctly and the
// environment looks plausble; otherwise fall back to detection
if (strcmp(session, "wayland") == 0 && getenv("WAYLAND_DISPLAY"))
desiredID = GLFW_PLATFORM_WAYLAND;
else if (strcmp(session, "x11") == 0 && getenv("DISPLAY"))
desiredID = GLFW_PLATFORM_X11;
}
}
#endif
if (desiredID == GLFW_ANY_PLATFORM)
{
// If there is exactly one platform available for auto-selection, let it emit the