Merge pull request #935 from agx/cursor-output-transform

wlr_cursor: transform absolute coordinates

backend/wayland/wl_seat.c

@@ -74,25 +74,11 @@ static void pointer_handle_motion(void *data, struct wl_pointer *wl_pointer,
 	}
 
 	struct wlr_output *wlr_output = &pointer->output->wlr_output;
-
-	struct wlr_box box = {
-		.x = wl_fixed_to_int(sx),
-		.y = wl_fixed_to_int(sy),
-	};
-	wlr_box_transform(&box, wlr_output->transform, wlr_output->width,
-		wlr_output->height, &box);
-	box.x /= wlr_output->scale;
-	box.y /= wlr_output->scale;
-
-	int output_width, output_height;
-	wlr_output_effective_resolution(&pointer->output->wlr_output,
-		&output_width, &output_height);
-
 	struct wlr_event_pointer_motion_absolute event = {
 		.device = &pointer->input_device->wlr_input_device,
 		.time_msec = time,
-		.x = (double)box.x / output_width,
-		.y = (double)box.y / output_height,
+		.x = wl_fixed_to_double(sx) / wlr_output->width,
+		.y = wl_fixed_to_double(sy) / wlr_output->height,
 	};
 	wlr_signal_emit_safe(&pointer->wlr_pointer.events.motion_absolute, &event);
 }

backend/x11/input_device.c

@@ -32,21 +32,11 @@ static void x11_handle_pointer_position(struct wlr_x11_output *output,
 		int16_t x, int16_t y, xcb_timestamp_t time) {
 	struct wlr_x11_backend *x11 = output->x11;
 	struct wlr_output *wlr_output = &output->wlr_output;
-
-	struct wlr_box box = { .x = x, .y = y };
-	wlr_box_transform(&box, wlr_output->transform, wlr_output->width,
-		wlr_output->height, &box);
-	box.x /= wlr_output->scale;
-	box.y /= wlr_output->scale;
-
-	int output_width, output_height;
-	wlr_output_effective_resolution(wlr_output, &output_width, &output_height);
-
 	struct wlr_event_pointer_motion_absolute event = {
 		.device = &output->pointer_dev,
 		.time_msec = time,
-		.x = (double)box.x / output_width,
-		.y = (double)box.y / output_height,
+		.x = (double)x / wlr_output->width,
+		.y = (double)y / wlr_output->height,
 	};
 	wlr_signal_emit_safe(&output->pointer.events.motion_absolute, &event);
 

types/wlr_cursor.c

@@ -330,11 +330,75 @@ static void handle_pointer_motion(struct wl_listener *listener, void *data) {
 	wlr_signal_emit_safe(&device->cursor->events.motion, event);
 }
 
+static void apply_output_transform(double *x, double *y,
+		enum wl_output_transform transform) {
+	double dx, dy;
+	double width = 1.0, height = 1.0;
+
+	switch (transform) {
+	case WL_OUTPUT_TRANSFORM_NORMAL:
+		dx = *x;
+		dy = *y;
+		break;
+	case WL_OUTPUT_TRANSFORM_90:
+		dx = *y;
+		dy = width - *x;
+		break;
+	case WL_OUTPUT_TRANSFORM_180:
+		dx = width - *x;
+		dy = height - *y;
+		break;
+	case WL_OUTPUT_TRANSFORM_270:
+		dx = height - *y;
+		dy = *x;
+		break;
+	case WL_OUTPUT_TRANSFORM_FLIPPED:
+		dx = width - *x;
+		dy = *y;
+		break;
+	case WL_OUTPUT_TRANSFORM_FLIPPED_90:
+		dx = height - *y;
+		dy = width - *x;
+		break;
+	case WL_OUTPUT_TRANSFORM_FLIPPED_180:
+		dx = *x;
+		dy = height - *y;
+		break;
+	case WL_OUTPUT_TRANSFORM_FLIPPED_270:
+		dx = *y;
+		dy = *x;
+		break;
+	}
+	*x = dx;
+	*y = dy;
+}
+
+
+static struct wlr_output *get_mapped_output(struct wlr_cursor_device *cursor_device) {
+	if (cursor_device->mapped_output) {
+		return cursor_device->mapped_output;
+	}
+
+	struct wlr_cursor *cursor = cursor_device->cursor;
+	assert(cursor);
+	if (cursor->state->mapped_output) {
+		return cursor->state->mapped_output;
+	}
+	return NULL;
+}
+
+
 static void handle_pointer_motion_absolute(struct wl_listener *listener,
 		void *data) {
 	struct wlr_event_pointer_motion_absolute *event = data;
 	struct wlr_cursor_device *device =
 		wl_container_of(listener, device, motion_absolute);
+
+	struct wlr_output *output =
+		get_mapped_output(device);
+	if (output) {
+		apply_output_transform(&event->x, &event->y, output->transform);
+	}
 	wlr_signal_emit_safe(&device->cursor->events.motion_absolute, event);
 }
 
@@ -362,6 +426,12 @@ static void handle_touch_down(struct wl_listener *listener, void *data) {
 	struct wlr_event_touch_down *event = data;
 	struct wlr_cursor_device *device;
 	device = wl_container_of(listener, device, touch_down);
+
+	struct wlr_output *output =
+		get_mapped_output(device);
+	if (output) {
+		apply_output_transform(&event->x, &event->y, output->transform);
+	}
 	wlr_signal_emit_safe(&device->cursor->events.touch_down, event);
 }
 
@@ -369,6 +439,12 @@ static void handle_touch_motion(struct wl_listener *listener, void *data) {
 	struct wlr_event_touch_motion *event = data;
 	struct wlr_cursor_device *device;
 	device = wl_container_of(listener, device, touch_motion);
+
+	struct wlr_output *output =
+		get_mapped_output(device);
+	if (output) {
+		apply_output_transform(&event->x, &event->y, output->transform);
+	}
 	wlr_signal_emit_safe(&device->cursor->events.touch_motion, event);
 }
 
@@ -383,6 +459,12 @@ static void handle_tablet_tool_tip(struct wl_listener *listener, void *data) {
 	struct wlr_event_tablet_tool_tip *event = data;
 	struct wlr_cursor_device *device;
 	device = wl_container_of(listener, device, tablet_tool_tip);
+
+	struct wlr_output *output =
+		get_mapped_output(device);
+	if (output) {
+		apply_output_transform(&event->x, &event->y, output->transform);
+	}
 	wlr_signal_emit_safe(&device->cursor->events.tablet_tool_tip, event);
 }
 
@@ -390,6 +472,12 @@ static void handle_tablet_tool_axis(struct wl_listener *listener, void *data) {
 	struct wlr_event_tablet_tool_axis *event = data;
 	struct wlr_cursor_device *device;
 	device = wl_container_of(listener, device, tablet_tool_axis);
+
+	struct wlr_output *output =
+		get_mapped_output(device);
+	if (output) {
+		apply_output_transform(&event->x, &event->y, output->transform);
+	}
 	wlr_signal_emit_safe(&device->cursor->events.tablet_tool_axis, event);
 }
 
@@ -406,6 +494,12 @@ static void handle_tablet_tool_proximity(struct wl_listener *listener,
 	struct wlr_event_tablet_tool_proximity *event = data;
 	struct wlr_cursor_device *device;
 	device = wl_container_of(listener, device, tablet_tool_proximity);
+
+	struct wlr_output *output =
+		get_mapped_output(device);
+	if (output) {
+		apply_output_transform(&event->x, &event->y, output->transform);
+	}
 	wlr_signal_emit_safe(&device->cursor->events.tablet_tool_proximity, event);
 }