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Wayland: Fix EGL buffer swap blocking indefinitely

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When the swap interval was nonzero, EGL on Wayland would wait
indefinitely for a frame callback on a suspended window, causing
applications that call eglSwapBuffers to halt.

This re-implements the wait for a surface frame so that we can add
a reasonable timeout, while setting the EGL swap interval to zero.  That
allows applications to make progress despite the window being suspended.

Some insights for how to structure this workaround were gleaned from
dri2_wl_swap_buffers_with_damage in Mesa.

This initial implementation still has a race between glfwHideWindow and
glfwSwapBuffers when rendering on a separate thread.  This could lead to
a window becoming visible again after being hidden on the main thread.

Related to #1350
Fixes #2582
Fixes #2640
Fixes #2719
Fixes #2723
Fixes #2800
Fixes #2827
This commit is contained in:
Camilla Löwy
2026-02-17 19:44:39 +01:00
parent 54b18d5547
commit fdd14e65b1
9 changed files with 166 additions and 2 deletions
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27
src/wl_platform.h
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@@ -51,6 +51,10 @@ typedef void (* PFN_wl_display_disconnect)(struct wl_display*);
typedef int (* PFN_wl_display_roundtrip)(struct wl_display*);
typedef int (* PFN_wl_display_get_fd)(struct wl_display*);
typedef int (* PFN_wl_display_prepare_read)(struct wl_display*);
typedef struct wl_event_queue* (* PFN_wl_display_create_queue)(struct wl_display*);
typedef void (* PFN_wl_event_queue_destroy)(struct wl_event_queue*);
typedef int (* PFN_wl_display_prepare_read_queue)(struct wl_display*,struct wl_event_queue*);
typedef int (* PFN_wl_display_dispatch_queue_pending)(struct wl_display*,struct wl_event_queue*);
typedef void (* PFN_wl_proxy_marshal)(struct wl_proxy*,uint32_t,...);
typedef int (* PFN_wl_proxy_add_listener)(struct wl_proxy*,void(**)(void),void*);
typedef void (* PFN_wl_proxy_destroy)(struct wl_proxy*);
@@ -62,6 +66,9 @@ typedef void (* PFN_wl_proxy_set_tag)(struct wl_proxy*,const char*const*);
typedef const char* const* (* PFN_wl_proxy_get_tag)(struct wl_proxy*);
typedef uint32_t (* PFN_wl_proxy_get_version)(struct wl_proxy*);
typedef struct wl_proxy* (* PFN_wl_proxy_marshal_flags)(struct wl_proxy*,uint32_t,const struct wl_interface*,uint32_t,uint32_t,...);
typedef void* (* PFN_wl_proxy_create_wrapper)(void*);
typedef void (* PFN_wl_proxy_wrapper_destroy)(void*);
typedef void (* PFN_wl_proxy_set_queue)(struct wl_proxy*,struct wl_event_queue*);
#define wl_display_flush _glfw.wl.client.display_flush
#define wl_display_cancel_read _glfw.wl.client.display_cancel_read
#define wl_display_dispatch_pending _glfw.wl.client.display_dispatch_pending
@@ -70,6 +77,10 @@ typedef struct wl_proxy* (* PFN_wl_proxy_marshal_flags)(struct wl_proxy*,uint32_
#define wl_display_roundtrip _glfw.wl.client.display_roundtrip
#define wl_display_get_fd _glfw.wl.client.display_get_fd
#define wl_display_prepare_read _glfw.wl.client.display_prepare_read
#define wl_display_create_queue _glfw.wl.client.display_create_queue
#define wl_display_prepare_read_queue _glfw.wl.client.display_prepare_read_queue
#define wl_display_dispatch_queue_pending _glfw.wl.client.display_dispatch_queue_pending
#define wl_event_queue_destroy _glfw.wl.client.event_queue_destroy
#define wl_proxy_marshal _glfw.wl.client.proxy_marshal
#define wl_proxy_add_listener _glfw.wl.client.proxy_add_listener
#define wl_proxy_destroy _glfw.wl.client.proxy_destroy
@@ -81,6 +92,9 @@ typedef struct wl_proxy* (* PFN_wl_proxy_marshal_flags)(struct wl_proxy*,uint32_
#define wl_proxy_set_tag _glfw.wl.client.proxy_set_tag
#define wl_proxy_get_version _glfw.wl.client.proxy_get_version
#define wl_proxy_marshal_flags _glfw.wl.client.proxy_marshal_flags
#define wl_proxy_create_wrapper _glfw.wl.client.proxy_create_wrapper
#define wl_proxy_wrapper_destroy _glfw.wl.client.proxy_wrapper_destroy
#define wl_proxy_set_queue _glfw.wl.client.proxy_set_queue
struct wl_shm;
struct wl_output;
@@ -364,7 +378,11 @@ typedef struct _GLFWwindowWayland
struct wl_callback* callback;
struct {
struct wl_event_queue* queue;
struct wl_egl_window* window;
struct wl_callback* callback;
struct wl_surface* wrapper;
int interval;
} egl;
struct {
@@ -537,6 +555,10 @@ typedef struct _GLFWlibraryWayland
PFN_wl_display_roundtrip display_roundtrip;
PFN_wl_display_get_fd display_get_fd;
PFN_wl_display_prepare_read display_prepare_read;
PFN_wl_display_create_queue display_create_queue;
PFN_wl_display_prepare_read_queue display_prepare_read_queue;
PFN_wl_display_dispatch_queue_pending display_dispatch_queue_pending;
PFN_wl_event_queue_destroy event_queue_destroy;
PFN_wl_proxy_marshal proxy_marshal;
PFN_wl_proxy_add_listener proxy_add_listener;
PFN_wl_proxy_destroy proxy_destroy;
@@ -548,6 +570,9 @@ typedef struct _GLFWlibraryWayland
PFN_wl_proxy_set_tag proxy_set_tag;
PFN_wl_proxy_get_version proxy_get_version;
PFN_wl_proxy_marshal_flags proxy_marshal_flags;
PFN_wl_proxy_create_wrapper proxy_create_wrapper;
PFN_wl_proxy_wrapper_destroy proxy_wrapper_destroy;
PFN_wl_proxy_set_queue proxy_set_queue;
} client;
struct {
@@ -706,3 +731,5 @@ void _glfwUpdateBufferScaleFromOutputsWayland(_GLFWwindow* window);
void _glfwAddSeatListenerWayland(struct wl_seat* seat);
void _glfwAddDataDeviceListenerWayland(struct wl_data_device* device);
GLFWbool _glfwWaitForEGLFrameWayland(_GLFWwindow* window);