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render/egl: add support for EGL_KHR_display_reference
See the spec at [1]. tl;dr EGL has terrible defaults: eglTerminate() may have side-effects on completely unrelated EGLDisplay objects. This extension allows us to opt-in to get the sane behavior: eglTerminate() only free's our own EGLDisplay without affecting others. [1]: https://registry.khronos.org/EGL/extensions/KHR/EGL_KHR_display_reference.txt
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2ad25b1460
commit
5206cea566
2 changed files with 15 additions and 2 deletions
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@ -24,6 +24,7 @@ struct wlr_egl {
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bool EXT_device_query;
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bool KHR_platform_gbm;
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bool EXT_platform_device;
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bool KHR_display_reference;
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} exts;
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struct {
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16
render/egl.c
16
render/egl.c
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@ -207,9 +207,10 @@ static struct wlr_egl *egl_create(void) {
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egl->exts.KHR_platform_gbm = check_egl_ext(client_exts_str,
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"EGL_KHR_platform_gbm");
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egl->exts.EXT_platform_device = check_egl_ext(client_exts_str,
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"EGL_EXT_platform_device");
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egl->exts.KHR_display_reference = check_egl_ext(client_exts_str,
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"EGL_KHR_display_reference");
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if (check_egl_ext(client_exts_str, "EGL_EXT_device_base") || check_egl_ext(client_exts_str, "EGL_EXT_device_enumeration")) {
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load_egl_proc(&egl->procs.eglQueryDevicesEXT, "eglQueryDevicesEXT");
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@ -351,8 +352,19 @@ static bool egl_init_display(struct wlr_egl *egl, EGLDisplay display) {
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static bool egl_init(struct wlr_egl *egl, EGLenum platform,
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void *remote_display) {
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EGLint display_attribs[3] = {0};
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size_t display_attribs_len = 0;
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if (egl->exts.KHR_display_reference) {
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display_attribs[display_attribs_len++] = EGL_TRACK_REFERENCES_KHR;
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display_attribs[display_attribs_len++] = EGL_TRUE;
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}
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display_attribs[display_attribs_len++] = EGL_NONE;
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assert(display_attribs_len < sizeof(display_attribs) / sizeof(display_attribs[0]));
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EGLDisplay display = egl->procs.eglGetPlatformDisplayEXT(platform,
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remote_display, NULL);
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remote_display, display_attribs);
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if (display == EGL_NO_DISPLAY) {
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wlr_log(WLR_ERROR, "Failed to create EGL display");
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return false;
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