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Wayland: Fix momentum scrolling not working on compositors that send a stop frame with no axis information

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Fixes #9653
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Kovid Goyal 2026-03-13 08:47:45 +05:30
parent 5585b773bf
commit 98931d99b0
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GPG key ID: 06BC317B515ACE7C
3 changed files with 12 additions and 1 deletions
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2
docs/changelog.rst
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@ -180,6 +180,8 @@ Detailed list of changes
- X11: Fix a regression that caused some high res scroll devices to be treated as line based scroll devices (:iss:`9649`)
- Wayland: Fix momentum scrolling not working on compositors that send a stop frame with no axis information (:iss:`9653`)
0.46.0 [2026-03-11]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

10
glfw/wl_init.c vendored
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@ -206,27 +206,35 @@ pointer_handle_frame(void *data UNUSED, struct wl_pointer *pointer UNUSED) {
_GLFWwindow* window = _glfw.wl.pointerFocus;
if (!window) return;
GLFWScrollEvent ev = {.keyboard_modifiers=_glfw.wl.xkb.states.modifiers};
bool found = false;
if (info.discrete.y_axis_type != AXIS_EVENT_UNKNOWN) {
ev.unscaled.y = info.discrete.y;
if (info.discrete.y_axis_type == AXIS_EVENT_VALUE120) ev.offset_type = GLFW_SCROLL_OFFEST_V120;
found = true;
} else if (info.continuous.y_axis_type != AXIS_EVENT_UNKNOWN) {
ev.offset_type = GLFW_SCROLL_OFFEST_HIGHRES;
ev.unscaled.y = info.continuous.y;
found = true;
}
if (info.discrete.x_axis_type != AXIS_EVENT_UNKNOWN) {
ev.unscaled.x = info.discrete.x;
if (info.discrete.x_axis_type == AXIS_EVENT_VALUE120) ev.offset_type = GLFW_SCROLL_OFFEST_V120;
found = true;
} else if (info.continuous.x_axis_type != AXIS_EVENT_UNKNOWN) {
ev.offset_type = GLFW_SCROLL_OFFEST_HIGHRES;
ev.unscaled.x = info.continuous.x;
found = true;
}
bool stopped = info.y_stop_received || info.x_stop_received;
if (!found && stopped) ev.offset_type = window->wl.prev_frame_offset_type;
ev.unscaled.x *= -1;
const double scale = ev.offset_type == GLFW_SCROLL_OFFEST_HIGHRES ? _glfwWaylandWindowScale(window) : 1;
ev.x_offset = scale * ev.unscaled.x; ev.y_offset = scale * ev.unscaled.y;
glfw_handle_scroll_event_for_momentum(
window, &ev, info.y_stop_received || info.x_stop_received, info.source_type == WL_POINTER_AXIS_SOURCE_FINGER);
window, &ev, stopped, info.source_type == WL_POINTER_AXIS_SOURCE_FINGER);
window->wl.prev_frame_offset_type = ev.offset_type;
/* clear pointer_curr_axis_info for next frame */
memset(&info, 0, sizeof(info));
}

1
glfw/wl_platform.h vendored
View file

@ -212,6 +212,7 @@ typedef struct _GLFWwindowWayland
uint32_t source_type;
monotonic_t x_start_time, x_stop_time, y_stop_time, y_start_time;
} pointer_curr_axis_info;
GLFWOffsetType prev_frame_offset_type;
_GLFWcursor* currentCursor;
double cursorPosX, cursorPosY, allCursorPosX, allCursorPosY;