From a7446792a1a0fd9fe3391f041d7bbfe9e2b11255 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Sun, 22 Oct 2017 23:19:21 -0400
Subject: [PATCH 01/14] Consider scale factor when rendering views

---
 include/rootston/config.h       |  1 +
 include/rootston/view.h         |  1 +
 include/wlr/types/wlr_surface.h |  6 +++++-
 rootston/config.c               |  4 ++++
 rootston/output.c               |  3 +++
 types/wlr_output.c              |  4 ++--
 types/wlr_surface.c             | 19 ++++++++++++++++---
 7 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/include/rootston/config.h b/include/rootston/config.h
index 75c04619..e0466117 100644
--- a/include/rootston/config.h
+++ b/include/rootston/config.h
@@ -8,6 +8,7 @@ struct output_config {
 	char *name;
 	enum wl_output_transform transform;
 	int x, y;
+	int scale;
 	struct wl_list link;
 	struct {
 		int width, height;
diff --git a/include/rootston/view.h b/include/rootston/view.h
index 993ff654..4a5e8d08 100644
--- a/include/rootston/view.h
+++ b/include/rootston/view.h
@@ -48,6 +48,7 @@ enum roots_view_type {
 
 struct roots_view {
 	struct roots_desktop *desktop;
+	struct roots_output *output;
 	double x, y;
 	float rotation;
 	// TODO: Something for roots-enforced width/height
diff --git a/include/wlr/types/wlr_surface.h b/include/wlr/types/wlr_surface.h
index ea4184aa..e1a07566 100644
--- a/include/wlr/types/wlr_surface.h
+++ b/include/wlr/types/wlr_surface.h
@@ -1,10 +1,10 @@
 #ifndef WLR_TYPES_WLR_SURFACE_H
 #define WLR_TYPES_WLR_SURFACE_H
-
 #include <wayland-server.h>
 #include <pixman.h>
 #include <stdint.h>
 #include <stdbool.h>
+#include <wlr/types/wlr_output.h>
 
 struct wlr_frame_callback {
 	struct wl_resource *resource;
@@ -135,4 +135,8 @@ struct wlr_surface *wlr_surface_get_main_surface(struct wlr_surface *surface);
  */
 struct wlr_subsurface *wlr_surface_subsurface_at(struct wlr_surface *surface,
 		double sx, double sy, double *sub_x, double *sub_y);
+
+void wlr_surface_send_enter(struct wlr_surface *surface,
+		struct wlr_output *output);
+
 #endif
diff --git a/rootston/config.c b/rootston/config.c
index 18138ab0..983117ba 100644
--- a/rootston/config.c
+++ b/rootston/config.c
@@ -220,6 +220,7 @@ static int config_ini_handler(void *user, const char *section, const char *name,
 			oc = calloc(1, sizeof(struct output_config));
 			oc->name = strdup(output_name);
 			oc->transform = WL_OUTPUT_TRANSFORM_NORMAL;
+			oc->scale = 1;
 			wl_list_insert(&config->outputs, &oc->link);
 		}
 
@@ -227,6 +228,9 @@ static int config_ini_handler(void *user, const char *section, const char *name,
 			oc->x = strtol(value, NULL, 10);
 		} else if (strcmp(name, "y") == 0) {
 			oc->y = strtol(value, NULL, 10);
+		} else if (strcmp(name, "scale") == 0) {
+			oc->scale = strtol(value, NULL, 10);
+			assert(oc->scale >= 1);
 		} else if (strcmp(name, "rotate") == 0) {
 			if (strcmp(value, "90") == 0) {
 				oc->transform = WL_OUTPUT_TRANSFORM_90;
diff --git a/rootston/output.c b/rootston/output.c
index baa7b6cc..faf39e74 100644
--- a/rootston/output.c
+++ b/rootston/output.c
@@ -27,6 +27,8 @@ static void render_surface(struct wlr_surface *surface,
 
 		if (wlr_output_layout_intersects(desktop->layout, wlr_output,
 				lx, ly, lx + width, ly + height)) {
+			// TODO: accomodate for mismatched scale, which can happen, for
+			// example, when a view is rendered over two outputs
 			float matrix[16];
 
 			float translate_origin[16];
@@ -217,6 +219,7 @@ void output_add_notify(struct wl_listener *listener, void *data) {
 		if (output_config->mode.width) {
 			set_mode(wlr_output, output_config);
 		}
+		wlr_output->scale = output_config->scale;
 		wlr_output_transform(wlr_output, output_config->transform);
 		wlr_output_layout_add(desktop->layout,
 				wlr_output, output_config->x, output_config->y);
diff --git a/types/wlr_output.c b/types/wlr_output.c
index 44d24ae3..2f5e3086 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -29,8 +29,7 @@ static void wl_output_send_to_resource(struct wl_resource *resource) {
 	if (version >= WL_OUTPUT_MODE_SINCE_VERSION) {
 		struct wlr_output_mode *mode;
 		wl_list_for_each(mode, &output->modes, link) {
-			// TODO: mode->flags should just be preferred
-			uint32_t flags = mode->flags;
+			uint32_t flags = mode->flags & ~WL_OUTPUT_MODE_PREFERRED;
 			if (output->current_mode == mode) {
 				flags |= WL_OUTPUT_MODE_CURRENT;
 			}
@@ -45,6 +44,7 @@ static void wl_output_send_to_resource(struct wl_resource *resource) {
 		}
 	}
 	if (version >= WL_OUTPUT_SCALE_SINCE_VERSION) {
+		wlr_log(L_DEBUG, "Sending scale");
 		wl_output_send_scale(resource, output->scale);
 	}
 	if (version >= WL_OUTPUT_DONE_SINCE_VERSION) {
diff --git a/types/wlr_surface.c b/types/wlr_surface.c
index 2a8c4d04..28f3d05b 100644
--- a/types/wlr_surface.c
+++ b/types/wlr_surface.c
@@ -649,14 +649,14 @@ void wlr_surface_get_matrix(struct wlr_surface *surface,
 		float (*matrix)[16],
 		const float (*projection)[16],
 		const float (*transform)[16]) {
-	int width = surface->texture->width / surface->current->scale;
-	int height = surface->texture->height / surface->current->scale;
+	int width = surface->texture->width;
+	int height = surface->texture->height;
 	float scale[16];
 	wlr_matrix_identity(matrix);
 	if (transform) {
 		wlr_matrix_mul(matrix, transform, matrix);
 	}
-	wlr_matrix_scale(&scale, width, height, 1);
+	wlr_matrix_scale(&scale, width, height, surface->current->scale);
 	wlr_matrix_mul(matrix, &scale, matrix);
 	wlr_matrix_mul(projection, matrix, matrix);
 }
@@ -894,3 +894,16 @@ struct wlr_subsurface *wlr_surface_subsurface_at(struct wlr_surface *surface,
 
 	return NULL;
 }
+
+void wlr_surface_send_enter(struct wlr_surface *surface,
+		struct wlr_output *output) {
+	struct wl_client *client = wl_resource_get_client(surface->resource);
+	struct wl_resource *resource;
+	wl_resource_for_each(resource, &output->wl_resources) {
+		if (client == wl_resource_get_client(resource)) {
+			wlr_log(L_DEBUG, "sending output enter");
+			wl_surface_send_enter(surface->resource, resource);
+			break;
+		}
+	}
+}

From 9861add146af54836ca85dd5769ab3b966346432 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Tue, 24 Oct 2017 08:37:30 -0400
Subject: [PATCH 02/14] Send surface enter output events to clients

---
 rootston/desktop.c |  32 +++-
 types/wlr_output.c | 442 ++++++++++++++++++++-------------------------
 2 files changed, 226 insertions(+), 248 deletions(-)

diff --git a/rootston/desktop.c b/rootston/desktop.c
index f93d1df8..37022ca4 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -45,14 +45,35 @@ void view_get_size(struct roots_view *view, struct wlr_box *box) {
 	box->height = view->wlr_surface->current->height;
 }
 
+static void view_update_output(struct roots_view *view) {
+	struct roots_desktop *desktop = view->desktop;
+	struct roots_output *output = NULL, *_output;
+	struct wlr_box box;
+	view_get_size(view, &box);
+	wl_list_for_each(_output, &desktop->outputs, link) {
+		if (!wlr_output_layout_intersects(desktop->layout, _output->wlr_output,
+			view->x, view->y, view->x + box.width, view->x + box.height)) {
+			continue;
+		}
+		if (output == NULL
+				|| output->wlr_output->scale < _output->wlr_output->scale) {
+			output = _output;
+		}
+	}
+	if (output && output != view->output) {
+		view->output = output;
+		wlr_surface_send_enter(view->wlr_surface, output->wlr_output);
+	}
+}
+
 void view_set_position(struct roots_view *view, double x, double y) {
 	if (view->set_position) {
 		view->set_position(view, x, y);
-		return;
+	} else {
+		view->x = x;
+		view->y = y;
 	}
-
-	view->x = x;
-	view->y = y;
+	view_update_output(view);
 }
 
 void view_activate(struct roots_view *view, bool activate) {
@@ -65,6 +86,7 @@ void view_resize(struct roots_view *view, uint32_t width, uint32_t height) {
 	if (view->resize) {
 		view->resize(view, width, height);
 	}
+	view_update_output(view);
 }
 
 void view_close(struct roots_view *view) {
@@ -111,6 +133,8 @@ void view_setup(struct roots_view *view) {
 
 	struct roots_input *input = view->desktop->server->input;
 	set_view_focus(input, view->desktop, view);
+	wlr_seat_keyboard_notify_enter(input->wl_seat, view->wlr_surface);
+	view_update_output(view);
 }
 
 void view_teardown(struct roots_view *view) {
diff --git a/types/wlr_output.c b/types/wlr_output.c
index 2f5e3086..dd7e8d6a 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -5,7 +5,6 @@
 #include <tgmath.h>
 #include <time.h>
 #include <wayland-server.h>
-#include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_surface.h>
 #include <wlr/interfaces/wlr_output.h>
@@ -136,9 +135,7 @@ static void wlr_output_update_matrix(struct wlr_output *output) {
 }
 
 void wlr_output_enable(struct wlr_output *output, bool enable) {
-	if (output->impl->enable) {
-		output->impl->enable(output, enable);
-	}
+	output->impl->enable(output, enable);
 }
 
 bool wlr_output_set_mode(struct wlr_output *output,
@@ -191,19 +188,192 @@ void wlr_output_set_position(struct wlr_output *output, int32_t lx,
 	}
 }
 
+static bool set_cursor(struct wlr_output *output, const uint8_t *buf,
+		int32_t stride, uint32_t width, uint32_t height, int32_t hotspot_x,
+		int32_t hotspot_y) {
+	if (output->impl->set_cursor
+			&& output->impl->set_cursor(output, buf, stride, width, height,
+				hotspot_x, hotspot_y, true)) {
+		output->cursor.is_sw = false;
+		return true;
+	}
+
+	wlr_log(L_INFO, "Falling back to software cursor");
+
+	output->cursor.is_sw = true;
+	output->cursor.width = width;
+	output->cursor.height = height;
+
+	if (!output->cursor.renderer) {
+		output->cursor.renderer = wlr_gles2_renderer_create(output->backend);
+		if (!output->cursor.renderer) {
+			return false;
+		}
+	}
+
+	if (!output->cursor.texture) {
+		output->cursor.texture =
+			wlr_render_texture_create(output->cursor.renderer);
+		if (!output->cursor.texture) {
+			return false;
+		}
+	}
+
+	return wlr_texture_upload_pixels(output->cursor.texture,
+		WL_SHM_FORMAT_ARGB8888, stride, width, height, buf);
+}
+
+bool wlr_output_set_cursor(struct wlr_output *output,
+		const uint8_t *buf, int32_t stride, uint32_t width, uint32_t height,
+		int32_t hotspot_x, int32_t hotspot_y) {
+	if (output->cursor.surface) {
+		wl_list_remove(&output->cursor.surface_commit.link);
+		wl_list_remove(&output->cursor.surface_destroy.link);
+		output->cursor.surface = NULL;
+	}
+
+	output->cursor.hotspot_x = hotspot_x;
+	output->cursor.hotspot_y = hotspot_y;
+
+	return set_cursor(output, buf, stride, width, height, hotspot_x, hotspot_y);
+}
+
+static inline int64_t timespec_to_msec(const struct timespec *a) {
+	return (int64_t)a->tv_sec * 1000 + a->tv_nsec / 1000000;
+}
+
+static void commit_cursor_surface(struct wlr_output *output,
+		struct wlr_surface *surface) {
+	if (output->cursor.is_sw) {
+		return;
+	}
+
+	struct wl_shm_buffer *buffer = wl_shm_buffer_get(surface->current->buffer);
+	if (buffer == NULL) {
+		return;
+	}
+
+	uint32_t format = wl_shm_buffer_get_format(buffer);
+	if (format != WL_SHM_FORMAT_ARGB8888) {
+		return;
+	}
+
+	void *buffer_data = wl_shm_buffer_get_data(buffer);
+	int32_t width = wl_shm_buffer_get_width(buffer);
+	int32_t height = wl_shm_buffer_get_height(buffer);
+	int32_t stride = wl_shm_buffer_get_stride(buffer);
+	wl_shm_buffer_begin_access(buffer);
+	wlr_output_set_cursor(output, buffer_data, stride/4, width, height,
+		output->cursor.hotspot_x - surface->current->sx,
+		output->cursor.hotspot_y - surface->current->sy);
+	wl_shm_buffer_end_access(buffer);
+}
+
+static void handle_cursor_surface_commit(struct wl_listener *listener,
+		void *data) {
+	struct wlr_output *output = wl_container_of(listener, output,
+		cursor.surface_commit);
+	struct wlr_surface *surface = data;
+
+	commit_cursor_surface(output, surface);
+
+	struct timespec now;
+	clock_gettime(CLOCK_MONOTONIC, &now);
+
+	struct wlr_frame_callback *cb, *cnext;
+	wl_list_for_each_safe(cb, cnext, &surface->current->frame_callback_list,
+			link) {
+		wl_callback_send_done(cb->resource, timespec_to_msec(&now));
+		wl_resource_destroy(cb->resource);
+	}
+}
+
+static void handle_cursor_surface_destroy(struct wl_listener *listener,
+		void *data) {
+	struct wlr_output *output = wl_container_of(listener, output,
+		cursor.surface_destroy);
+
+	wl_list_remove(&output->cursor.surface_commit.link);
+	wl_list_remove(&output->cursor.surface_destroy.link);
+	output->cursor.surface = NULL;
+}
+
+void wlr_output_set_cursor_surface(struct wlr_output *output,
+		struct wlr_surface *surface, int32_t hotspot_x, int32_t hotspot_y) {
+	if (surface && strcmp(surface->role, "wl_pointer-cursor") != 0) {
+		return;
+	}
+
+	output->cursor.hotspot_x = hotspot_x;
+	output->cursor.hotspot_y = hotspot_y;
+
+	if (surface && surface == output->cursor.surface) {
+		if (output->impl->set_cursor && !output->cursor.is_sw) {
+			// Only update the hotspot
+			output->impl->set_cursor(output, NULL, 0, 0, 0, hotspot_x,
+				hotspot_y, false);
+		}
+		return;
+	}
+
+	if (output->cursor.surface) {
+		wl_list_remove(&output->cursor.surface_commit.link);
+		wl_list_remove(&output->cursor.surface_destroy.link);
+		output->cursor.surface = NULL;
+	}
+
+	// Disable hardware cursor
+	// TODO: support hardware cursors
+	output->cursor.is_sw = true;
+	if (output->impl->set_cursor) {
+		output->impl->set_cursor(output, NULL, 0, 0, 0, hotspot_x, hotspot_y,
+			true);
+	}
+
+	//output->cursor.is_sw = output->impl->set_cursor == NULL;
+	output->cursor.surface = surface;
+
+	if (surface != NULL) {
+		wl_signal_add(&surface->events.commit, &output->cursor.surface_commit);
+		wl_signal_add(&surface->events.destroy,
+			&output->cursor.surface_destroy);
+		commit_cursor_surface(output, surface);
+	} else {
+		set_cursor(output, NULL, 0, 0, 0, hotspot_x, hotspot_y);
+	}
+}
+
+bool wlr_output_move_cursor(struct wlr_output *output, int x, int y) {
+	output->cursor.x = x;
+	output->cursor.y = y;
+
+	if (output->cursor.is_sw) {
+		return true;
+	}
+
+	if (!output->impl->move_cursor) {
+		return false;
+	}
+
+	return output->impl->move_cursor(output, x, y);
+}
+
 void wlr_output_init(struct wlr_output *output, struct wlr_backend *backend,
 		const struct wlr_output_impl *impl) {
-	assert(impl->make_current && impl->swap_buffers && impl->transform);
 	output->backend = backend;
 	output->impl = impl;
 	wl_list_init(&output->modes);
 	output->transform = WL_OUTPUT_TRANSFORM_NORMAL;
 	output->scale = 1;
-	wl_list_init(&output->cursors);
 	wl_signal_init(&output->events.frame);
 	wl_signal_init(&output->events.swap_buffers);
 	wl_signal_init(&output->events.resolution);
 	wl_signal_init(&output->events.destroy);
+
+	wl_list_init(&output->cursor.surface_commit.link);
+	output->cursor.surface_commit.notify = handle_cursor_surface_commit;
+	wl_list_init(&output->cursor.surface_destroy.link);
+	output->cursor.surface_destroy.notify = handle_cursor_surface_destroy;
 }
 
 void wlr_output_destroy(struct wlr_output *output) {
@@ -213,6 +383,9 @@ void wlr_output_destroy(struct wlr_output *output) {
 
 	wl_signal_emit(&output->events.destroy, output);
 
+	wlr_texture_destroy(output->cursor.texture);
+	wlr_renderer_destroy(output->cursor.renderer);
+
 	struct wlr_output_mode *mode, *tmp_mode;
 	wl_list_for_each_safe(mode, tmp_mode, &output->modes, link) {
 		free(mode);
@@ -227,7 +400,6 @@ void wlr_output_destroy(struct wlr_output *output) {
 
 void wlr_output_effective_resolution(struct wlr_output *output,
 		int *width, int *height) {
-	// TODO: Scale factor
 	if (output->transform % 2 == 1) {
 		*width = output->height;
 		*height = output->width;
@@ -241,62 +413,27 @@ void wlr_output_make_current(struct wlr_output *output) {
 	output->impl->make_current(output);
 }
 
-static void output_cursor_get_box(struct wlr_output_cursor *cursor,
-		struct wlr_box *box) {
-	box->x = cursor->x - cursor->hotspot_x;
-	box->y = cursor->y - cursor->hotspot_y;
-	box->width = cursor->width;
-	box->height = cursor->height;
-}
-
-static void output_cursor_render(struct wlr_output_cursor *cursor) {
-	struct wlr_texture *texture = cursor->texture;
-	struct wlr_renderer *renderer = cursor->renderer;
-	if (cursor->surface != NULL) {
-		// Some clients commit a cursor surface with a NULL buffer to hide it.
-		if (!wlr_surface_has_buffer(cursor->surface)) {
-			return;
-		}
-		texture = cursor->surface->texture;
-		renderer = cursor->surface->renderer;
-	}
-
-	if (texture == NULL || renderer == NULL) {
-		return;
-	}
-
-	struct wlr_box output_box;
-	output_box.x = output_box.y = 0;
-	output_box.width = cursor->output->width;
-	output_box.height = cursor->output->height;
-
-	struct wlr_box cursor_box;
-	output_cursor_get_box(cursor, &cursor_box);
-
-	struct wlr_box intersection;
-	struct wlr_box *intersection_ptr = &intersection;
-	if (!wlr_box_intersection(&output_box, &cursor_box, &intersection_ptr)) {
-		return;
-	}
-
-	glViewport(0, 0, cursor->output->width, cursor->output->height);
-	glEnable(GL_BLEND);
-	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-
-	float matrix[16];
-	wlr_texture_get_matrix(texture, &matrix,
-		&cursor->output->transform_matrix, cursor->x - cursor->hotspot_x,
-		cursor->y - cursor->hotspot_y);
-	wlr_render_with_matrix(renderer, texture, &matrix);
-}
-
 void wlr_output_swap_buffers(struct wlr_output *output) {
-	struct wlr_output_cursor *cursor;
-	wl_list_for_each(cursor, &output->cursors, link) {
-		if (output->hardware_cursor == cursor) {
-			continue;
+	if (output->cursor.is_sw) {
+		glViewport(0, 0, output->width, output->height);
+		glEnable(GL_BLEND);
+		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+		struct wlr_texture *texture = output->cursor.texture;
+		struct wlr_renderer *renderer = output->cursor.renderer;
+		if (output->cursor.surface) {
+			texture = output->cursor.surface->texture;
+			renderer = output->cursor.surface->renderer;
+		}
+
+		// We check texture->valid because some clients set a cursor surface
+		// with a NULL buffer to hide it
+		if (renderer && texture && texture->valid) {
+			float matrix[16];
+			wlr_texture_get_matrix(texture, &matrix, &output->transform_matrix,
+				output->cursor.x, output->cursor.y);
+			wlr_render_with_matrix(renderer, texture, &matrix);
 		}
-		output_cursor_render(cursor);
 	}
 
 	wl_signal_emit(&output->events.swap_buffers, &output);
@@ -317,186 +454,3 @@ uint32_t wlr_output_get_gamma_size(struct wlr_output *output) {
 	}
 	return output->impl->get_gamma_size(output);
 }
-
-static void output_cursor_reset(struct wlr_output_cursor *cursor) {
-	if (cursor->surface != NULL) {
-		wl_list_remove(&cursor->surface_commit.link);
-		wl_list_remove(&cursor->surface_destroy.link);
-		cursor->surface = NULL;
-	}
-}
-
-bool wlr_output_cursor_set_image(struct wlr_output_cursor *cursor,
-		const uint8_t *pixels, int32_t stride, uint32_t width, uint32_t height,
-		int32_t hotspot_x, int32_t hotspot_y) {
-	output_cursor_reset(cursor);
-
-	cursor->width = width;
-	cursor->height = height;
-	cursor->hotspot_x = hotspot_x;
-	cursor->hotspot_y = hotspot_y;
-
-	if (cursor->output->hardware_cursor == NULL &&
-			cursor->output->impl->set_cursor) {
-		int ok = cursor->output->impl->set_cursor(cursor->output, pixels,
-			stride, width, height, hotspot_x, hotspot_y, true);
-		if (ok) {
-			cursor->output->hardware_cursor = cursor;
-			return true;
-		}
-	}
-
-	wlr_log(L_INFO, "Falling back to software cursor");
-
-	if (cursor->renderer == NULL) {
-		cursor->renderer = wlr_gles2_renderer_create(cursor->output->backend);
-		if (cursor->renderer == NULL) {
-			return false;
-		}
-	}
-
-	if (cursor->texture == NULL) {
-		cursor->texture = wlr_render_texture_create(cursor->renderer);
-		if (cursor->texture == NULL) {
-			return false;
-		}
-	}
-
-	return wlr_texture_upload_pixels(cursor->texture, WL_SHM_FORMAT_ARGB8888,
-		stride, width, height, pixels);
-}
-
-static void output_cursor_commit(struct wlr_output_cursor *cursor) {
-	cursor->width = cursor->surface->current->width;
-	cursor->height = cursor->surface->current->height;
-
-	// TODO: if hardware cursor, upload pixels
-}
-
-static inline int64_t timespec_to_msec(const struct timespec *a) {
-	return (int64_t)a->tv_sec * 1000 + a->tv_nsec / 1000000;
-}
-
-static void output_cursor_handle_commit(struct wl_listener *listener,
-		void *data) {
-	struct wlr_output_cursor *cursor = wl_container_of(listener, cursor,
-		surface_commit);
-	struct wlr_surface *surface = data;
-
-	output_cursor_commit(cursor);
-
-	struct timespec now;
-	clock_gettime(CLOCK_MONOTONIC, &now);
-
-	struct wlr_frame_callback *cb, *cnext;
-	wl_list_for_each_safe(cb, cnext, &surface->current->frame_callback_list,
-			link) {
-		wl_callback_send_done(cb->resource, timespec_to_msec(&now));
-		wl_resource_destroy(cb->resource);
-	}
-}
-
-static void output_cursor_handle_destroy(struct wl_listener *listener,
-		void *data) {
-	struct wlr_output_cursor *cursor = wl_container_of(listener, cursor,
-		surface_destroy);
-	output_cursor_reset(cursor);
-}
-
-void wlr_output_cursor_set_surface(struct wlr_output_cursor *cursor,
-		struct wlr_surface *surface, int32_t hotspot_x, int32_t hotspot_y) {
-	if (surface && strcmp(surface->role, "wl_pointer-cursor") != 0) {
-		return;
-	}
-
-	if (surface) {
-		cursor->width = surface->current->width;
-		cursor->height = surface->current->height;
-	}
-	cursor->hotspot_x = hotspot_x;
-	cursor->hotspot_y = hotspot_y;
-
-	if (surface && surface == cursor->surface) {
-		if (cursor->output->hardware_cursor == cursor &&
-				cursor->output->impl->set_cursor) {
-			// If the surface hasn't changed and it's an hardware cursor, only
-			// update the hotspot
-			cursor->output->impl->set_cursor(cursor->output, NULL, 0, 0, 0,
-				hotspot_x, hotspot_y, false);
-		}
-		return;
-	}
-
-	output_cursor_reset(cursor);
-
-	// Disable hardware cursor for surfaces
-	// TODO: support hardware cursors
-	if (cursor->output->hardware_cursor == cursor &&
-			cursor->output->impl->set_cursor) {
-		cursor->output->impl->set_cursor(cursor->output, NULL, 0, 0, 0, 0, 0,
-			true);
-		cursor->output->hardware_cursor = NULL;
-	}
-
-	cursor->surface = surface;
-
-	if (surface != NULL) {
-		wl_signal_add(&surface->events.commit, &cursor->surface_commit);
-		wl_signal_add(&surface->events.destroy, &cursor->surface_destroy);
-		output_cursor_commit(cursor);
-	} else {
-		// TODO: if hardware cursor, disable cursor
-	}
-}
-
-bool wlr_output_cursor_move(struct wlr_output_cursor *cursor, int x, int y) {
-	cursor->x = x;
-	cursor->y = y;
-
-	if (cursor->output->hardware_cursor != cursor) {
-		return true;
-	}
-
-	if (!cursor->output->impl->move_cursor) {
-		return false;
-	}
-	return cursor->output->impl->move_cursor(cursor->output, x, y);
-}
-
-struct wlr_output_cursor *wlr_output_cursor_create(struct wlr_output *output) {
-	struct wlr_output_cursor *cursor =
-		calloc(1, sizeof(struct wlr_output_cursor));
-	if (cursor == NULL) {
-		return NULL;
-	}
-	cursor->output = output;
-	wl_list_init(&cursor->surface_commit.link);
-	cursor->surface_commit.notify = output_cursor_handle_commit;
-	wl_list_init(&cursor->surface_destroy.link);
-	cursor->surface_destroy.notify = output_cursor_handle_destroy;
-	wl_list_insert(&output->cursors, &cursor->link);
-	return cursor;
-}
-
-void wlr_output_cursor_destroy(struct wlr_output_cursor *cursor) {
-	if (cursor == NULL) {
-		return;
-	}
-	output_cursor_reset(cursor);
-	if (cursor->output->hardware_cursor == cursor) {
-		// If this cursor was the hardware cursor, disable it
-		if (cursor->output->impl->set_cursor) {
-			cursor->output->impl->set_cursor(cursor->output, NULL, 0, 0, 0, 0,
-				0, true);
-		}
-		cursor->output->hardware_cursor = NULL;
-	}
-	if (cursor->texture != NULL) {
-		wlr_texture_destroy(cursor->texture);
-	}
-	if (cursor->renderer != NULL) {
-		wlr_renderer_destroy(cursor->renderer);
-	}
-	wl_list_remove(&cursor->link);
-	free(cursor);
-}

From a6930cd8ea2424f12aafc8d0b67426d0e5161c44 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Wed, 25 Oct 2017 22:37:02 -0400
Subject: [PATCH 03/14] Handle output enter/leave correctly

---
 include/rootston/view.h         |  5 ++-
 include/wlr/types/wlr_surface.h |  3 ++
 rootston/desktop.c              | 59 ++++++++++++++++++---------------
 rootston/xdg_shell_v6.c         |  2 +-
 types/wlr_output.c              |  1 -
 types/wlr_surface.c             | 13 +++++++-
 6 files changed, 51 insertions(+), 32 deletions(-)

diff --git a/include/rootston/view.h b/include/rootston/view.h
index 4a5e8d08..79d61ba6 100644
--- a/include/rootston/view.h
+++ b/include/rootston/view.h
@@ -48,7 +48,6 @@ enum roots_view_type {
 
 struct roots_view {
 	struct roots_desktop *desktop;
-	struct roots_output *output;
 	double x, y;
 	float rotation;
 	// TODO: Something for roots-enforced width/height
@@ -72,14 +71,14 @@ struct roots_view {
 	// configure event from the xdg_shell
 	// If not then this should follow the typical type/impl pattern we use
 	// elsewhere
-	void (*get_size)(struct roots_view *view, struct wlr_box *box);
+	void (*get_size)(const struct roots_view *view, struct wlr_box *box);
 	void (*activate)(struct roots_view *view, bool active);
 	void (*resize)(struct roots_view *view, uint32_t width, uint32_t height);
 	void (*set_position)(struct roots_view *view, double x, double y);
 	void (*close)(struct roots_view *view);
 };
 
-void view_get_size(struct roots_view *view, struct wlr_box *box);
+void view_get_size(const struct roots_view *view, struct wlr_box *box);
 void view_activate(struct roots_view *view, bool active);
 void view_resize(struct roots_view *view, uint32_t width, uint32_t height);
 void view_set_position(struct roots_view *view, double x, double y);
diff --git a/include/wlr/types/wlr_surface.h b/include/wlr/types/wlr_surface.h
index e1a07566..cea53109 100644
--- a/include/wlr/types/wlr_surface.h
+++ b/include/wlr/types/wlr_surface.h
@@ -139,4 +139,7 @@ struct wlr_subsurface *wlr_surface_subsurface_at(struct wlr_surface *surface,
 void wlr_surface_send_enter(struct wlr_surface *surface,
 		struct wlr_output *output);
 
+void wlr_surface_send_leave(struct wlr_surface *surface,
+		struct wlr_output *output);
+
 #endif
diff --git a/rootston/desktop.c b/rootston/desktop.c
index 37022ca4..0cc2180d 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -35,45 +35,52 @@ void view_destroy(struct roots_view *view) {
 	free(view);
 }
 
-void view_get_size(struct roots_view *view, struct wlr_box *box) {
+void view_get_size(const struct roots_view *view, struct wlr_box *box) {
 	if (view->get_size) {
 		view->get_size(view, box);
-		return;
+	} else {
+		box->width = view->wlr_surface->current->width;
+		box->height = view->wlr_surface->current->height;
 	}
-	box->x = box->y = 0;
-	box->width = view->wlr_surface->current->width;
-	box->height = view->wlr_surface->current->height;
+	box->x = view->x;
+	box->y = view->y;
 }
 
-static void view_update_output(struct roots_view *view) {
+static void view_update_output(const struct roots_view *view,
+		const struct wlr_box *before) {
 	struct roots_desktop *desktop = view->desktop;
-	struct roots_output *output = NULL, *_output;
+	struct roots_output *output;
 	struct wlr_box box;
 	view_get_size(view, &box);
-	wl_list_for_each(_output, &desktop->outputs, link) {
-		if (!wlr_output_layout_intersects(desktop->layout, _output->wlr_output,
-			view->x, view->y, view->x + box.width, view->x + box.height)) {
-			continue;
+	wl_list_for_each(output, &desktop->outputs, link) {
+		bool intersected = before->x != -1 && wlr_output_layout_intersects(
+				desktop->layout, output->wlr_output,
+				before->x, before->y, before->x + before->width,
+				before->y + before->height);
+		bool intersects = wlr_output_layout_intersects(
+				desktop->layout, output->wlr_output,
+				view->x, view->y, view->x + box.width, view->y + box.height);
+		if (intersected && !intersects) {
+			wlr_log(L_DEBUG, "Leaving output %s", output->wlr_output->name);
+			wlr_surface_send_leave(view->wlr_surface, output->wlr_output);
 		}
-		if (output == NULL
-				|| output->wlr_output->scale < _output->wlr_output->scale) {
-			output = _output;
+		if (!intersected && intersects) {
+			wlr_log(L_DEBUG, "Entering output %s", output->wlr_output->name);
+			wlr_surface_send_enter(view->wlr_surface, output->wlr_output);
 		}
 	}
-	if (output && output != view->output) {
-		view->output = output;
-		wlr_surface_send_enter(view->wlr_surface, output->wlr_output);
-	}
 }
 
 void view_set_position(struct roots_view *view, double x, double y) {
+	struct wlr_box before;
+	view_get_size(view, &before);
 	if (view->set_position) {
 		view->set_position(view, x, y);
 	} else {
 		view->x = x;
 		view->y = y;
 	}
-	view_update_output(view);
+	view_update_output(view, &before);
 }
 
 void view_activate(struct roots_view *view, bool activate) {
@@ -83,10 +90,12 @@ void view_activate(struct roots_view *view, bool activate) {
 }
 
 void view_resize(struct roots_view *view, uint32_t width, uint32_t height) {
+	struct wlr_box before;
+	view_get_size(view, &before);
 	if (view->resize) {
 		view->resize(view, width, height);
 	}
-	view_update_output(view);
+	view_update_output(view, &before);
 }
 
 void view_close(struct roots_view *view) {
@@ -96,8 +105,8 @@ void view_close(struct roots_view *view) {
 }
 
 bool view_center(struct roots_view *view) {
-	struct wlr_box size;
-	view_get_size(view, &size);
+	struct wlr_box box;
+	view_get_size(view, &box);
 
 	struct roots_desktop *desktop = view->desktop;
 	struct wlr_cursor *cursor = desktop->server->input->cursor;
@@ -122,16 +131,14 @@ bool view_center(struct roots_view *view) {
 
 	double view_x = (double)(width - size.width) / 2 + l_output->x;
 	double view_y = (double)(height - size.height) / 2 + l_output->y;
-
 	view_set_position(view, view_x, view_y);
 
 	return true;
 }
 
-void view_setup(struct roots_view *view) {
-	view_center(view);
-
+void view_initialize(struct roots_view *view) {
 	struct roots_input *input = view->desktop->server->input;
+	view_center(view);
 	set_view_focus(input, view->desktop, view);
 	wlr_seat_keyboard_notify_enter(input->wl_seat, view->wlr_surface);
 	view_update_output(view);
diff --git a/rootston/xdg_shell_v6.c b/rootston/xdg_shell_v6.c
index 704ccb1e..2d83019f 100644
--- a/rootston/xdg_shell_v6.c
+++ b/rootston/xdg_shell_v6.c
@@ -10,7 +10,7 @@
 #include "rootston/server.h"
 #include "rootston/input.h"
 
-static void get_size(struct roots_view *view, struct wlr_box *box) {
+static void get_size(const struct roots_view *view, struct wlr_box *box) {
 	assert(view->type == ROOTS_XDG_SHELL_V6_VIEW);
 	struct wlr_xdg_surface_v6 *surf = view->xdg_surface_v6;
 	// TODO: surf->geometry can be NULL
diff --git a/types/wlr_output.c b/types/wlr_output.c
index dd7e8d6a..d6efd9bf 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -43,7 +43,6 @@ static void wl_output_send_to_resource(struct wl_resource *resource) {
 		}
 	}
 	if (version >= WL_OUTPUT_SCALE_SINCE_VERSION) {
-		wlr_log(L_DEBUG, "Sending scale");
 		wl_output_send_scale(resource, output->scale);
 	}
 	if (version >= WL_OUTPUT_DONE_SINCE_VERSION) {
diff --git a/types/wlr_surface.c b/types/wlr_surface.c
index 28f3d05b..a21be8de 100644
--- a/types/wlr_surface.c
+++ b/types/wlr_surface.c
@@ -901,9 +901,20 @@ void wlr_surface_send_enter(struct wlr_surface *surface,
 	struct wl_resource *resource;
 	wl_resource_for_each(resource, &output->wl_resources) {
 		if (client == wl_resource_get_client(resource)) {
-			wlr_log(L_DEBUG, "sending output enter");
 			wl_surface_send_enter(surface->resource, resource);
 			break;
 		}
 	}
 }
+
+void wlr_surface_send_leave(struct wlr_surface *surface,
+		struct wlr_output *output) {
+	struct wl_client *client = wl_resource_get_client(surface->resource);
+	struct wl_resource *resource;
+	wl_resource_for_each(resource, &output->wl_resources) {
+		if (client == wl_resource_get_client(resource)) {
+			wl_surface_send_leave(surface->resource, resource);
+			break;
+		}
+	}
+}

From bafb97087121dbeab83ffc7d2e571d4c53d1f000 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Wed, 25 Oct 2017 22:46:20 -0400
Subject: [PATCH 04/14] View view_at (and pointer events) for hidpi

---
 rootston/desktop.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/rootston/desktop.c b/rootston/desktop.c
index 0cc2180d..f7f12eff 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -61,11 +61,9 @@ static void view_update_output(const struct roots_view *view,
 				desktop->layout, output->wlr_output,
 				view->x, view->y, view->x + box.width, view->y + box.height);
 		if (intersected && !intersects) {
-			wlr_log(L_DEBUG, "Leaving output %s", output->wlr_output->name);
 			wlr_surface_send_leave(view->wlr_surface, output->wlr_output);
 		}
 		if (!intersected && intersects) {
-			wlr_log(L_DEBUG, "Entering output %s", output->wlr_output->name);
 			wlr_surface_send_enter(view->wlr_surface, output->wlr_output);
 		}
 	}
@@ -167,14 +165,15 @@ struct roots_view *view_at(struct roots_desktop *desktop, double lx, double ly,
 			continue;
 		}
 
-		double view_sx = lx - view->x;
-		double view_sy = ly - view->y;
+		int scale = view->wlr_surface->current->scale;
+		double view_sx = (lx - view->x) / (double)scale;
+		double view_sy = (ly - view->y) / (double)scale;
 
 		struct wlr_box box = {
 			.x = 0,
 			.y = 0,
-			.width = view->wlr_surface->current->buffer_width,
-			.height = view->wlr_surface->current->buffer_height,
+			.width = view->wlr_surface->current->buffer_width * scale,
+			.height = view->wlr_surface->current->buffer_height * scale,
 		};
 		if (view->rotation != 0.0) {
 			// Coordinates relative to the center of the view

From c8f97a3a2c43948147e4225e09437884a848fa9d Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Wed, 25 Oct 2017 23:03:30 -0400
Subject: [PATCH 05/14] Use surface matrix for software cursors

A similar change should probably be applied to hardware cursors, though
more complicated. Also, this doesn't actually fix the issue where the
cursor is too small when over a scale=2 surface. Apparently they don't
set their cursor scales to 2. Seems like a client bug? idk
---
 types/wlr_output.c  | 13 +++++++++++--
 types/wlr_surface.c |  2 +-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/types/wlr_output.c b/types/wlr_output.c
index d6efd9bf..4bc9d6aa 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -429,8 +429,17 @@ void wlr_output_swap_buffers(struct wlr_output *output) {
 		// with a NULL buffer to hide it
 		if (renderer && texture && texture->valid) {
 			float matrix[16];
-			wlr_texture_get_matrix(texture, &matrix, &output->transform_matrix,
-				output->cursor.x, output->cursor.y);
+			if (output->cursor.surface) {
+				float translation[16];
+				wlr_matrix_translate(&translation,
+						output->cursor.x, output->cursor.y, 0);
+				wlr_surface_get_matrix(output->cursor.surface,
+						&matrix, &output->transform_matrix, &translation);
+			} else {
+				wlr_texture_get_matrix(texture,
+						&matrix, &output->transform_matrix,
+						output->cursor.x, output->cursor.y);
+			}
 			wlr_render_with_matrix(renderer, texture, &matrix);
 		}
 	}
diff --git a/types/wlr_surface.c b/types/wlr_surface.c
index a21be8de..a6f91d47 100644
--- a/types/wlr_surface.c
+++ b/types/wlr_surface.c
@@ -656,7 +656,7 @@ void wlr_surface_get_matrix(struct wlr_surface *surface,
 	if (transform) {
 		wlr_matrix_mul(matrix, transform, matrix);
 	}
-	wlr_matrix_scale(&scale, width, height, surface->current->scale);
+	wlr_matrix_scale(&scale, width, height, 1);
 	wlr_matrix_mul(matrix, &scale, matrix);
 	wlr_matrix_mul(projection, matrix, matrix);
 }

From 8c0929cfb3e97a71a00210fc299fb7c65703e053 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Wed, 25 Oct 2017 23:27:12 -0400
Subject: [PATCH 06/14] Fix backwards bit banging

---
 types/wlr_output.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/types/wlr_output.c b/types/wlr_output.c
index 4bc9d6aa..7a56eab6 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -28,7 +28,7 @@ static void wl_output_send_to_resource(struct wl_resource *resource) {
 	if (version >= WL_OUTPUT_MODE_SINCE_VERSION) {
 		struct wlr_output_mode *mode;
 		wl_list_for_each(mode, &output->modes, link) {
-			uint32_t flags = mode->flags & ~WL_OUTPUT_MODE_PREFERRED;
+			uint32_t flags = mode->flags & WL_OUTPUT_MODE_PREFERRED;
 			if (output->current_mode == mode) {
 				flags |= WL_OUTPUT_MODE_CURRENT;
 			}

From 7f76f463181872f39356e5a4d6e2e34fd9a0a1bb Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Wed, 25 Oct 2017 23:48:54 -0400
Subject: [PATCH 07/14] Adjust rendering to compensate for disparate scale

Something about my math is off, but I'm not certain what. Would
appreciate a second opinion.
---
 rootston/output.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/rootston/output.c b/rootston/output.c
index faf39e74..37af1e2d 100644
--- a/rootston/output.c
+++ b/rootston/output.c
@@ -20,29 +20,35 @@ static void render_surface(struct wlr_surface *surface,
 		struct roots_desktop *desktop, struct wlr_output *wlr_output,
 		struct timespec *when, double lx, double ly, float rotation) {
 	if (surface->texture->valid) {
-		int width = surface->current->buffer_width;
-		int height = surface->current->buffer_height;
+		float scale_factor = (float)wlr_output->scale / surface->current->scale;
+		int width = surface->current->buffer_width * scale_factor;
+		int height = surface->current->buffer_height * scale_factor;
 		double ox = lx, oy = ly;
 		wlr_output_layout_output_coords(desktop->layout, wlr_output, &ox, &oy);
 
 		if (wlr_output_layout_intersects(desktop->layout, wlr_output,
 				lx, ly, lx + width, ly + height)) {
-			// TODO: accomodate for mismatched scale, which can happen, for
-			// example, when a view is rendered over two outputs
 			float matrix[16];
 
 			float translate_origin[16];
 			wlr_matrix_translate(&translate_origin,
 				(int)ox + width / 2, (int)oy + height / 2, 0);
+
 			float rotate[16];
 			wlr_matrix_rotate(&rotate, rotation);
+
 			float translate_center[16];
 			wlr_matrix_translate(&translate_center, -width / 2, -height / 2, 0);
+
+			float scale[16];
+			wlr_matrix_scale(&scale, width, height, 1);
+
 			float transform[16];
 			wlr_matrix_mul(&translate_origin, &rotate, &transform);
 			wlr_matrix_mul(&transform, &translate_center, &transform);
-			wlr_surface_get_matrix(surface, &matrix,
-					&wlr_output->transform_matrix, &transform);
+			wlr_matrix_mul(&transform, &scale, &transform);
+			wlr_matrix_mul(&wlr_output->transform_matrix, &transform, &matrix);
+
 			wlr_render_with_matrix(desktop->server->renderer,
 					surface->texture, &matrix);
 

From ed74f473d60bb577aca9c7309664ae07d3ccf09b Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Wed, 1 Nov 2017 08:57:30 -0400
Subject: [PATCH 08/14] Fix various rebase-related bugs

---
 rootston/desktop.c |  10 +-
 types/wlr_output.c | 454 ++++++++++++++++++++++++---------------------
 2 files changed, 252 insertions(+), 212 deletions(-)

diff --git a/rootston/desktop.c b/rootston/desktop.c
index f7f12eff..a724a40c 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -127,19 +127,21 @@ bool view_center(struct roots_view *view) {
 	int width, height;
 	wlr_output_effective_resolution(output, &width, &height);
 
-	double view_x = (double)(width - size.width) / 2 + l_output->x;
-	double view_y = (double)(height - size.height) / 2 + l_output->y;
+	double view_x = (double)(width - box.width) / 2 + l_output->x;
+	double view_y = (double)(height - box.height) / 2 + l_output->y;
 	view_set_position(view, view_x, view_y);
 
 	return true;
 }
 
-void view_initialize(struct roots_view *view) {
+void view_setup(struct roots_view *view) {
 	struct roots_input *input = view->desktop->server->input;
 	view_center(view);
 	set_view_focus(input, view->desktop, view);
 	wlr_seat_keyboard_notify_enter(input->wl_seat, view->wlr_surface);
-	view_update_output(view);
+	struct wlr_box before;
+	view_get_size(view, &before);
+	view_update_output(view, &before);
 }
 
 void view_teardown(struct roots_view *view) {
diff --git a/types/wlr_output.c b/types/wlr_output.c
index 7a56eab6..44d24ae3 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -5,6 +5,7 @@
 #include <tgmath.h>
 #include <time.h>
 #include <wayland-server.h>
+#include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_surface.h>
 #include <wlr/interfaces/wlr_output.h>
@@ -28,7 +29,8 @@ static void wl_output_send_to_resource(struct wl_resource *resource) {
 	if (version >= WL_OUTPUT_MODE_SINCE_VERSION) {
 		struct wlr_output_mode *mode;
 		wl_list_for_each(mode, &output->modes, link) {
-			uint32_t flags = mode->flags & WL_OUTPUT_MODE_PREFERRED;
+			// TODO: mode->flags should just be preferred
+			uint32_t flags = mode->flags;
 			if (output->current_mode == mode) {
 				flags |= WL_OUTPUT_MODE_CURRENT;
 			}
@@ -134,7 +136,9 @@ static void wlr_output_update_matrix(struct wlr_output *output) {
 }
 
 void wlr_output_enable(struct wlr_output *output, bool enable) {
-	output->impl->enable(output, enable);
+	if (output->impl->enable) {
+		output->impl->enable(output, enable);
+	}
 }
 
 bool wlr_output_set_mode(struct wlr_output *output,
@@ -187,192 +191,19 @@ void wlr_output_set_position(struct wlr_output *output, int32_t lx,
 	}
 }
 
-static bool set_cursor(struct wlr_output *output, const uint8_t *buf,
-		int32_t stride, uint32_t width, uint32_t height, int32_t hotspot_x,
-		int32_t hotspot_y) {
-	if (output->impl->set_cursor
-			&& output->impl->set_cursor(output, buf, stride, width, height,
-				hotspot_x, hotspot_y, true)) {
-		output->cursor.is_sw = false;
-		return true;
-	}
-
-	wlr_log(L_INFO, "Falling back to software cursor");
-
-	output->cursor.is_sw = true;
-	output->cursor.width = width;
-	output->cursor.height = height;
-
-	if (!output->cursor.renderer) {
-		output->cursor.renderer = wlr_gles2_renderer_create(output->backend);
-		if (!output->cursor.renderer) {
-			return false;
-		}
-	}
-
-	if (!output->cursor.texture) {
-		output->cursor.texture =
-			wlr_render_texture_create(output->cursor.renderer);
-		if (!output->cursor.texture) {
-			return false;
-		}
-	}
-
-	return wlr_texture_upload_pixels(output->cursor.texture,
-		WL_SHM_FORMAT_ARGB8888, stride, width, height, buf);
-}
-
-bool wlr_output_set_cursor(struct wlr_output *output,
-		const uint8_t *buf, int32_t stride, uint32_t width, uint32_t height,
-		int32_t hotspot_x, int32_t hotspot_y) {
-	if (output->cursor.surface) {
-		wl_list_remove(&output->cursor.surface_commit.link);
-		wl_list_remove(&output->cursor.surface_destroy.link);
-		output->cursor.surface = NULL;
-	}
-
-	output->cursor.hotspot_x = hotspot_x;
-	output->cursor.hotspot_y = hotspot_y;
-
-	return set_cursor(output, buf, stride, width, height, hotspot_x, hotspot_y);
-}
-
-static inline int64_t timespec_to_msec(const struct timespec *a) {
-	return (int64_t)a->tv_sec * 1000 + a->tv_nsec / 1000000;
-}
-
-static void commit_cursor_surface(struct wlr_output *output,
-		struct wlr_surface *surface) {
-	if (output->cursor.is_sw) {
-		return;
-	}
-
-	struct wl_shm_buffer *buffer = wl_shm_buffer_get(surface->current->buffer);
-	if (buffer == NULL) {
-		return;
-	}
-
-	uint32_t format = wl_shm_buffer_get_format(buffer);
-	if (format != WL_SHM_FORMAT_ARGB8888) {
-		return;
-	}
-
-	void *buffer_data = wl_shm_buffer_get_data(buffer);
-	int32_t width = wl_shm_buffer_get_width(buffer);
-	int32_t height = wl_shm_buffer_get_height(buffer);
-	int32_t stride = wl_shm_buffer_get_stride(buffer);
-	wl_shm_buffer_begin_access(buffer);
-	wlr_output_set_cursor(output, buffer_data, stride/4, width, height,
-		output->cursor.hotspot_x - surface->current->sx,
-		output->cursor.hotspot_y - surface->current->sy);
-	wl_shm_buffer_end_access(buffer);
-}
-
-static void handle_cursor_surface_commit(struct wl_listener *listener,
-		void *data) {
-	struct wlr_output *output = wl_container_of(listener, output,
-		cursor.surface_commit);
-	struct wlr_surface *surface = data;
-
-	commit_cursor_surface(output, surface);
-
-	struct timespec now;
-	clock_gettime(CLOCK_MONOTONIC, &now);
-
-	struct wlr_frame_callback *cb, *cnext;
-	wl_list_for_each_safe(cb, cnext, &surface->current->frame_callback_list,
-			link) {
-		wl_callback_send_done(cb->resource, timespec_to_msec(&now));
-		wl_resource_destroy(cb->resource);
-	}
-}
-
-static void handle_cursor_surface_destroy(struct wl_listener *listener,
-		void *data) {
-	struct wlr_output *output = wl_container_of(listener, output,
-		cursor.surface_destroy);
-
-	wl_list_remove(&output->cursor.surface_commit.link);
-	wl_list_remove(&output->cursor.surface_destroy.link);
-	output->cursor.surface = NULL;
-}
-
-void wlr_output_set_cursor_surface(struct wlr_output *output,
-		struct wlr_surface *surface, int32_t hotspot_x, int32_t hotspot_y) {
-	if (surface && strcmp(surface->role, "wl_pointer-cursor") != 0) {
-		return;
-	}
-
-	output->cursor.hotspot_x = hotspot_x;
-	output->cursor.hotspot_y = hotspot_y;
-
-	if (surface && surface == output->cursor.surface) {
-		if (output->impl->set_cursor && !output->cursor.is_sw) {
-			// Only update the hotspot
-			output->impl->set_cursor(output, NULL, 0, 0, 0, hotspot_x,
-				hotspot_y, false);
-		}
-		return;
-	}
-
-	if (output->cursor.surface) {
-		wl_list_remove(&output->cursor.surface_commit.link);
-		wl_list_remove(&output->cursor.surface_destroy.link);
-		output->cursor.surface = NULL;
-	}
-
-	// Disable hardware cursor
-	// TODO: support hardware cursors
-	output->cursor.is_sw = true;
-	if (output->impl->set_cursor) {
-		output->impl->set_cursor(output, NULL, 0, 0, 0, hotspot_x, hotspot_y,
-			true);
-	}
-
-	//output->cursor.is_sw = output->impl->set_cursor == NULL;
-	output->cursor.surface = surface;
-
-	if (surface != NULL) {
-		wl_signal_add(&surface->events.commit, &output->cursor.surface_commit);
-		wl_signal_add(&surface->events.destroy,
-			&output->cursor.surface_destroy);
-		commit_cursor_surface(output, surface);
-	} else {
-		set_cursor(output, NULL, 0, 0, 0, hotspot_x, hotspot_y);
-	}
-}
-
-bool wlr_output_move_cursor(struct wlr_output *output, int x, int y) {
-	output->cursor.x = x;
-	output->cursor.y = y;
-
-	if (output->cursor.is_sw) {
-		return true;
-	}
-
-	if (!output->impl->move_cursor) {
-		return false;
-	}
-
-	return output->impl->move_cursor(output, x, y);
-}
-
 void wlr_output_init(struct wlr_output *output, struct wlr_backend *backend,
 		const struct wlr_output_impl *impl) {
+	assert(impl->make_current && impl->swap_buffers && impl->transform);
 	output->backend = backend;
 	output->impl = impl;
 	wl_list_init(&output->modes);
 	output->transform = WL_OUTPUT_TRANSFORM_NORMAL;
 	output->scale = 1;
+	wl_list_init(&output->cursors);
 	wl_signal_init(&output->events.frame);
 	wl_signal_init(&output->events.swap_buffers);
 	wl_signal_init(&output->events.resolution);
 	wl_signal_init(&output->events.destroy);
-
-	wl_list_init(&output->cursor.surface_commit.link);
-	output->cursor.surface_commit.notify = handle_cursor_surface_commit;
-	wl_list_init(&output->cursor.surface_destroy.link);
-	output->cursor.surface_destroy.notify = handle_cursor_surface_destroy;
 }
 
 void wlr_output_destroy(struct wlr_output *output) {
@@ -382,9 +213,6 @@ void wlr_output_destroy(struct wlr_output *output) {
 
 	wl_signal_emit(&output->events.destroy, output);
 
-	wlr_texture_destroy(output->cursor.texture);
-	wlr_renderer_destroy(output->cursor.renderer);
-
 	struct wlr_output_mode *mode, *tmp_mode;
 	wl_list_for_each_safe(mode, tmp_mode, &output->modes, link) {
 		free(mode);
@@ -399,6 +227,7 @@ void wlr_output_destroy(struct wlr_output *output) {
 
 void wlr_output_effective_resolution(struct wlr_output *output,
 		int *width, int *height) {
+	// TODO: Scale factor
 	if (output->transform % 2 == 1) {
 		*width = output->height;
 		*height = output->width;
@@ -412,36 +241,62 @@ void wlr_output_make_current(struct wlr_output *output) {
 	output->impl->make_current(output);
 }
 
+static void output_cursor_get_box(struct wlr_output_cursor *cursor,
+		struct wlr_box *box) {
+	box->x = cursor->x - cursor->hotspot_x;
+	box->y = cursor->y - cursor->hotspot_y;
+	box->width = cursor->width;
+	box->height = cursor->height;
+}
+
+static void output_cursor_render(struct wlr_output_cursor *cursor) {
+	struct wlr_texture *texture = cursor->texture;
+	struct wlr_renderer *renderer = cursor->renderer;
+	if (cursor->surface != NULL) {
+		// Some clients commit a cursor surface with a NULL buffer to hide it.
+		if (!wlr_surface_has_buffer(cursor->surface)) {
+			return;
+		}
+		texture = cursor->surface->texture;
+		renderer = cursor->surface->renderer;
+	}
+
+	if (texture == NULL || renderer == NULL) {
+		return;
+	}
+
+	struct wlr_box output_box;
+	output_box.x = output_box.y = 0;
+	output_box.width = cursor->output->width;
+	output_box.height = cursor->output->height;
+
+	struct wlr_box cursor_box;
+	output_cursor_get_box(cursor, &cursor_box);
+
+	struct wlr_box intersection;
+	struct wlr_box *intersection_ptr = &intersection;
+	if (!wlr_box_intersection(&output_box, &cursor_box, &intersection_ptr)) {
+		return;
+	}
+
+	glViewport(0, 0, cursor->output->width, cursor->output->height);
+	glEnable(GL_BLEND);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+	float matrix[16];
+	wlr_texture_get_matrix(texture, &matrix,
+		&cursor->output->transform_matrix, cursor->x - cursor->hotspot_x,
+		cursor->y - cursor->hotspot_y);
+	wlr_render_with_matrix(renderer, texture, &matrix);
+}
+
 void wlr_output_swap_buffers(struct wlr_output *output) {
-	if (output->cursor.is_sw) {
-		glViewport(0, 0, output->width, output->height);
-		glEnable(GL_BLEND);
-		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-
-		struct wlr_texture *texture = output->cursor.texture;
-		struct wlr_renderer *renderer = output->cursor.renderer;
-		if (output->cursor.surface) {
-			texture = output->cursor.surface->texture;
-			renderer = output->cursor.surface->renderer;
-		}
-
-		// We check texture->valid because some clients set a cursor surface
-		// with a NULL buffer to hide it
-		if (renderer && texture && texture->valid) {
-			float matrix[16];
-			if (output->cursor.surface) {
-				float translation[16];
-				wlr_matrix_translate(&translation,
-						output->cursor.x, output->cursor.y, 0);
-				wlr_surface_get_matrix(output->cursor.surface,
-						&matrix, &output->transform_matrix, &translation);
-			} else {
-				wlr_texture_get_matrix(texture,
-						&matrix, &output->transform_matrix,
-						output->cursor.x, output->cursor.y);
-			}
-			wlr_render_with_matrix(renderer, texture, &matrix);
+	struct wlr_output_cursor *cursor;
+	wl_list_for_each(cursor, &output->cursors, link) {
+		if (output->hardware_cursor == cursor) {
+			continue;
 		}
+		output_cursor_render(cursor);
 	}
 
 	wl_signal_emit(&output->events.swap_buffers, &output);
@@ -462,3 +317,186 @@ uint32_t wlr_output_get_gamma_size(struct wlr_output *output) {
 	}
 	return output->impl->get_gamma_size(output);
 }
+
+static void output_cursor_reset(struct wlr_output_cursor *cursor) {
+	if (cursor->surface != NULL) {
+		wl_list_remove(&cursor->surface_commit.link);
+		wl_list_remove(&cursor->surface_destroy.link);
+		cursor->surface = NULL;
+	}
+}
+
+bool wlr_output_cursor_set_image(struct wlr_output_cursor *cursor,
+		const uint8_t *pixels, int32_t stride, uint32_t width, uint32_t height,
+		int32_t hotspot_x, int32_t hotspot_y) {
+	output_cursor_reset(cursor);
+
+	cursor->width = width;
+	cursor->height = height;
+	cursor->hotspot_x = hotspot_x;
+	cursor->hotspot_y = hotspot_y;
+
+	if (cursor->output->hardware_cursor == NULL &&
+			cursor->output->impl->set_cursor) {
+		int ok = cursor->output->impl->set_cursor(cursor->output, pixels,
+			stride, width, height, hotspot_x, hotspot_y, true);
+		if (ok) {
+			cursor->output->hardware_cursor = cursor;
+			return true;
+		}
+	}
+
+	wlr_log(L_INFO, "Falling back to software cursor");
+
+	if (cursor->renderer == NULL) {
+		cursor->renderer = wlr_gles2_renderer_create(cursor->output->backend);
+		if (cursor->renderer == NULL) {
+			return false;
+		}
+	}
+
+	if (cursor->texture == NULL) {
+		cursor->texture = wlr_render_texture_create(cursor->renderer);
+		if (cursor->texture == NULL) {
+			return false;
+		}
+	}
+
+	return wlr_texture_upload_pixels(cursor->texture, WL_SHM_FORMAT_ARGB8888,
+		stride, width, height, pixels);
+}
+
+static void output_cursor_commit(struct wlr_output_cursor *cursor) {
+	cursor->width = cursor->surface->current->width;
+	cursor->height = cursor->surface->current->height;
+
+	// TODO: if hardware cursor, upload pixels
+}
+
+static inline int64_t timespec_to_msec(const struct timespec *a) {
+	return (int64_t)a->tv_sec * 1000 + a->tv_nsec / 1000000;
+}
+
+static void output_cursor_handle_commit(struct wl_listener *listener,
+		void *data) {
+	struct wlr_output_cursor *cursor = wl_container_of(listener, cursor,
+		surface_commit);
+	struct wlr_surface *surface = data;
+
+	output_cursor_commit(cursor);
+
+	struct timespec now;
+	clock_gettime(CLOCK_MONOTONIC, &now);
+
+	struct wlr_frame_callback *cb, *cnext;
+	wl_list_for_each_safe(cb, cnext, &surface->current->frame_callback_list,
+			link) {
+		wl_callback_send_done(cb->resource, timespec_to_msec(&now));
+		wl_resource_destroy(cb->resource);
+	}
+}
+
+static void output_cursor_handle_destroy(struct wl_listener *listener,
+		void *data) {
+	struct wlr_output_cursor *cursor = wl_container_of(listener, cursor,
+		surface_destroy);
+	output_cursor_reset(cursor);
+}
+
+void wlr_output_cursor_set_surface(struct wlr_output_cursor *cursor,
+		struct wlr_surface *surface, int32_t hotspot_x, int32_t hotspot_y) {
+	if (surface && strcmp(surface->role, "wl_pointer-cursor") != 0) {
+		return;
+	}
+
+	if (surface) {
+		cursor->width = surface->current->width;
+		cursor->height = surface->current->height;
+	}
+	cursor->hotspot_x = hotspot_x;
+	cursor->hotspot_y = hotspot_y;
+
+	if (surface && surface == cursor->surface) {
+		if (cursor->output->hardware_cursor == cursor &&
+				cursor->output->impl->set_cursor) {
+			// If the surface hasn't changed and it's an hardware cursor, only
+			// update the hotspot
+			cursor->output->impl->set_cursor(cursor->output, NULL, 0, 0, 0,
+				hotspot_x, hotspot_y, false);
+		}
+		return;
+	}
+
+	output_cursor_reset(cursor);
+
+	// Disable hardware cursor for surfaces
+	// TODO: support hardware cursors
+	if (cursor->output->hardware_cursor == cursor &&
+			cursor->output->impl->set_cursor) {
+		cursor->output->impl->set_cursor(cursor->output, NULL, 0, 0, 0, 0, 0,
+			true);
+		cursor->output->hardware_cursor = NULL;
+	}
+
+	cursor->surface = surface;
+
+	if (surface != NULL) {
+		wl_signal_add(&surface->events.commit, &cursor->surface_commit);
+		wl_signal_add(&surface->events.destroy, &cursor->surface_destroy);
+		output_cursor_commit(cursor);
+	} else {
+		// TODO: if hardware cursor, disable cursor
+	}
+}
+
+bool wlr_output_cursor_move(struct wlr_output_cursor *cursor, int x, int y) {
+	cursor->x = x;
+	cursor->y = y;
+
+	if (cursor->output->hardware_cursor != cursor) {
+		return true;
+	}
+
+	if (!cursor->output->impl->move_cursor) {
+		return false;
+	}
+	return cursor->output->impl->move_cursor(cursor->output, x, y);
+}
+
+struct wlr_output_cursor *wlr_output_cursor_create(struct wlr_output *output) {
+	struct wlr_output_cursor *cursor =
+		calloc(1, sizeof(struct wlr_output_cursor));
+	if (cursor == NULL) {
+		return NULL;
+	}
+	cursor->output = output;
+	wl_list_init(&cursor->surface_commit.link);
+	cursor->surface_commit.notify = output_cursor_handle_commit;
+	wl_list_init(&cursor->surface_destroy.link);
+	cursor->surface_destroy.notify = output_cursor_handle_destroy;
+	wl_list_insert(&output->cursors, &cursor->link);
+	return cursor;
+}
+
+void wlr_output_cursor_destroy(struct wlr_output_cursor *cursor) {
+	if (cursor == NULL) {
+		return;
+	}
+	output_cursor_reset(cursor);
+	if (cursor->output->hardware_cursor == cursor) {
+		// If this cursor was the hardware cursor, disable it
+		if (cursor->output->impl->set_cursor) {
+			cursor->output->impl->set_cursor(cursor->output, NULL, 0, 0, 0, 0,
+				0, true);
+		}
+		cursor->output->hardware_cursor = NULL;
+	}
+	if (cursor->texture != NULL) {
+		wlr_texture_destroy(cursor->texture);
+	}
+	if (cursor->renderer != NULL) {
+		wlr_renderer_destroy(cursor->renderer);
+	}
+	wl_list_remove(&cursor->link);
+	free(cursor);
+}

From ca8cf7d48dc8de94494e23292c1687c1dad766f2 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Thu, 2 Nov 2017 23:17:39 -0400
Subject: [PATCH 09/14] Rethink HiDPI output layouts, fixes everything

Except for subsurfaces not rendering at the right scale. But that part
is (somewhat) easy.
---
 rootston/desktop.c | 9 ++++-----
 rootston/output.c  | 2 ++
 types/wlr_output.c | 5 ++++-
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/rootston/desktop.c b/rootston/desktop.c
index a724a40c..f87be11e 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -167,15 +167,14 @@ struct roots_view *view_at(struct roots_desktop *desktop, double lx, double ly,
 			continue;
 		}
 
-		int scale = view->wlr_surface->current->scale;
-		double view_sx = (lx - view->x) / (double)scale;
-		double view_sy = (ly - view->y) / (double)scale;
+		double view_sx = lx - view->x;
+		double view_sy = ly - view->y;
 
 		struct wlr_box box = {
 			.x = 0,
 			.y = 0,
-			.width = view->wlr_surface->current->buffer_width * scale,
-			.height = view->wlr_surface->current->buffer_height * scale,
+			.width = view->wlr_surface->current->buffer_width,
+			.height = view->wlr_surface->current->buffer_height,
 		};
 		if (view->rotation != 0.0) {
 			// Coordinates relative to the center of the view
diff --git a/rootston/output.c b/rootston/output.c
index 37af1e2d..c21c6781 100644
--- a/rootston/output.c
+++ b/rootston/output.c
@@ -25,6 +25,8 @@ static void render_surface(struct wlr_surface *surface,
 		int height = surface->current->buffer_height * scale_factor;
 		double ox = lx, oy = ly;
 		wlr_output_layout_output_coords(desktop->layout, wlr_output, &ox, &oy);
+		ox *= wlr_output->scale;
+		oy *= wlr_output->scale;
 
 		if (wlr_output_layout_intersects(desktop->layout, wlr_output,
 				lx, ly, lx + width, ly + height)) {
diff --git a/types/wlr_output.c b/types/wlr_output.c
index 44d24ae3..82e805b4 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -227,7 +227,6 @@ void wlr_output_destroy(struct wlr_output *output) {
 
 void wlr_output_effective_resolution(struct wlr_output *output,
 		int *width, int *height) {
-	// TODO: Scale factor
 	if (output->transform % 2 == 1) {
 		*width = output->height;
 		*height = output->width;
@@ -235,6 +234,8 @@ void wlr_output_effective_resolution(struct wlr_output *output,
 		*width = output->width;
 		*height = output->height;
 	}
+	*width /= output->scale;
+	*height /= output->scale;
 }
 
 void wlr_output_make_current(struct wlr_output *output) {
@@ -450,6 +451,8 @@ void wlr_output_cursor_set_surface(struct wlr_output_cursor *cursor,
 }
 
 bool wlr_output_cursor_move(struct wlr_output_cursor *cursor, int x, int y) {
+	x *= cursor->output->scale;
+	y *= cursor->output->scale;
 	cursor->x = x;
 	cursor->y = y;
 

From 975b9dc365d5a7bec531522320a1506323575525 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Thu, 2 Nov 2017 23:33:06 -0400
Subject: [PATCH 10/14] Fix view centering on HiDPI outputs

---
 rootston/desktop.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/rootston/desktop.c b/rootston/desktop.c
index f87be11e..fe95426f 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -126,6 +126,8 @@ bool view_center(struct roots_view *view) {
 
 	int width, height;
 	wlr_output_effective_resolution(output, &width, &height);
+	width /= output->scale;
+	height /= output->scale;
 
 	double view_x = (double)(width - box.width) / 2 + l_output->x;
 	double view_y = (double)(height - box.height) / 2 + l_output->y;

From 6d8e1abfc0a266e8ff1a8c9ba1a004faeaac79d5 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Sat, 4 Nov 2017 01:35:12 -0400
Subject: [PATCH 11/14] Improve input sensitivity

We now use doubles until the last minute, which makes it so we can move
the pointer more precisely. This also includes a fix for tablet tools,
which move absolutely and sometimes do not update the X or Y axis.
---
 backend/libinput/tablet_tool.c | 2 ++
 include/wlr/types/wlr_output.h | 5 +++--
 rootston/cursor.c              | 9 +++++++++
 types/wlr_cursor.c             | 4 ++--
 types/wlr_output.c             | 6 ++++--
 5 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/backend/libinput/tablet_tool.c b/backend/libinput/tablet_tool.c
index 3caaf3f7..3d5fafc3 100644
--- a/backend/libinput/tablet_tool.c
+++ b/backend/libinput/tablet_tool.c
@@ -70,6 +70,8 @@ void handle_tablet_tool_axis(struct libinput_event *event,
 		wlr_event.updated_axes |= WLR_TABLET_TOOL_AXIS_WHEEL;
 		wlr_event.wheel_delta = libinput_event_tablet_tool_get_wheel_delta(tevent);
 	}
+	wlr_log(L_DEBUG, "Tablet tool axis event %d @ %f,%f",
+			wlr_event.updated_axes, wlr_event.x_mm, wlr_event.y_mm);
 	wl_signal_emit(&wlr_dev->tablet_tool->events.axis, &wlr_event);
 }
 
diff --git a/include/wlr/types/wlr_output.h b/include/wlr/types/wlr_output.h
index e6323f9c..df123639 100644
--- a/include/wlr/types/wlr_output.h
+++ b/include/wlr/types/wlr_output.h
@@ -14,7 +14,7 @@ struct wlr_output_mode {
 
 struct wlr_output_cursor {
 	struct wlr_output *output;
-	int32_t x, y;
+	double x, y;
 	bool enabled;
 	uint32_t width, height;
 	int32_t hotspot_x, hotspot_y;
@@ -95,7 +95,8 @@ bool wlr_output_cursor_set_image(struct wlr_output_cursor *cursor,
 	int32_t hotspot_x, int32_t hotspot_y);
 void wlr_output_cursor_set_surface(struct wlr_output_cursor *cursor,
 	struct wlr_surface *surface, int32_t hotspot_x, int32_t hotspot_y);
-bool wlr_output_cursor_move(struct wlr_output_cursor *cursor, int x, int y);
+bool wlr_output_cursor_move(struct wlr_output_cursor *cursor,
+	double x, double y);
 void wlr_output_cursor_destroy(struct wlr_output_cursor *cursor);
 
 #endif
diff --git a/rootston/cursor.c b/rootston/cursor.c
index 31001a9f..aa8e5122 100644
--- a/rootston/cursor.c
+++ b/rootston/cursor.c
@@ -378,11 +378,20 @@ static void handle_touch_motion(struct wl_listener *listener, void *data) {
 static void handle_tool_axis(struct wl_listener *listener, void *data) {
 	struct roots_input *input = wl_container_of(listener, input, cursor_tool_axis);
 	struct wlr_event_tablet_tool_axis *event = data;
+
 	if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_X) &&
 			(event->updated_axes & WLR_TABLET_TOOL_AXIS_Y)) {
 		wlr_cursor_warp_absolute(input->cursor, event->device,
 			event->x_mm / event->width_mm, event->y_mm / event->height_mm);
 		cursor_update_position(input, event->time_msec);
+	} else if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_X)) {
+		wlr_cursor_warp_absolute(input->cursor, event->device,
+			event->x_mm / event->width_mm, -1);
+		cursor_update_position(input, event->time_msec);
+	} else if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_Y)) {
+		wlr_cursor_warp_absolute(input->cursor, event->device,
+			-1, event->y_mm / event->height_mm);
+		cursor_update_position(input, event->time_msec);
 	}
 }
 
diff --git a/types/wlr_cursor.c b/types/wlr_cursor.c
index 83d36d14..dfaccb53 100644
--- a/types/wlr_cursor.c
+++ b/types/wlr_cursor.c
@@ -261,8 +261,8 @@ void wlr_cursor_warp_absolute(struct wlr_cursor *cur,
 		mapping = wlr_output_layout_get_box(cur->state->layout, NULL);
 	}
 
-	double x = mapping->width * x_mm + mapping->x;
-	double y = mapping->height * y_mm + mapping->y;
+	double x = x_mm > 0 ? mapping->width * x_mm + mapping->x : cur->x;
+	double y = y_mm > 0 ? mapping->height * y_mm + mapping->y : cur->y;
 
 	wlr_cursor_warp_unchecked(cur, x, y);
 }
diff --git a/types/wlr_output.c b/types/wlr_output.c
index ff8b07be..3ad69ce3 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -472,9 +472,11 @@ void wlr_output_cursor_set_surface(struct wlr_output_cursor *cursor,
 	}
 }
 
-bool wlr_output_cursor_move(struct wlr_output_cursor *cursor, int x, int y) {
+bool wlr_output_cursor_move(struct wlr_output_cursor *cursor,
+		double x, double y) {
 	x *= cursor->output->scale;
 	y *= cursor->output->scale;
+	wlr_log(L_DEBUG, "Moving cursor to %f,%f", x, y);
 	cursor->x = x;
 	cursor->y = y;
 
@@ -486,7 +488,7 @@ bool wlr_output_cursor_move(struct wlr_output_cursor *cursor, int x, int y) {
 	if (!cursor->output->impl->move_cursor) {
 		return false;
 	}
-	return cursor->output->impl->move_cursor(cursor->output, x, y);
+	return cursor->output->impl->move_cursor(cursor->output, (int)x, (int)y);
 }
 
 struct wlr_output_cursor *wlr_output_cursor_create(struct wlr_output *output) {

From 2f6cfe4057fbef41977159e24fea0d19fbeeb052 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Sat, 4 Nov 2017 11:47:34 -0400
Subject: [PATCH 12/14] Fix software cursors on scaled outputs

There was an issue where it would only work within the boundaries of the
unscaled resolution.
---
 backend/wayland/output.c | 2 +-
 types/wlr_output.c       | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/backend/wayland/output.c b/backend/wayland/output.c
index 90f8b39a..c4301617 100644
--- a/backend/wayland/output.c
+++ b/backend/wayland/output.c
@@ -249,7 +249,7 @@ struct wlr_output *wlr_wl_output_create(struct wlr_backend *_backend) {
 	wlr_output_init(&output->wlr_output, &backend->backend, &output_impl);
 	struct wlr_output *wlr_output = &output->wlr_output;
 
-	wlr_output_update_size(wlr_output, 640, 480);
+	wlr_output_update_size(wlr_output, 1280, 720);
 	strncpy(wlr_output->make, "wayland", sizeof(wlr_output->make));
 	strncpy(wlr_output->model, "wayland", sizeof(wlr_output->model));
 	snprintf(wlr_output->name, sizeof(wlr_output->name), "WL-%d",
diff --git a/types/wlr_output.c b/types/wlr_output.c
index 3ad69ce3..df02afec 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -270,6 +270,8 @@ static void output_cursor_render(struct wlr_output_cursor *cursor) {
 	output_box.x = output_box.y = 0;
 	wlr_output_effective_resolution(cursor->output, &output_box.width,
 		&output_box.height);
+	output_box.width *= cursor->output->scale;
+	output_box.height *= cursor->output->scale;
 
 	struct wlr_box cursor_box;
 	output_cursor_get_box(cursor, &cursor_box);
@@ -476,7 +478,6 @@ bool wlr_output_cursor_move(struct wlr_output_cursor *cursor,
 		double x, double y) {
 	x *= cursor->output->scale;
 	y *= cursor->output->scale;
-	wlr_log(L_DEBUG, "Moving cursor to %f,%f", x, y);
 	cursor->x = x;
 	cursor->y = y;
 

From 75fd9b8426953d98c57fc0f598bf3a3ace602c0c Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Thu, 9 Nov 2017 08:40:15 -0500
Subject: [PATCH 13/14] Remove extraneous keyboard send_enter

---
 rootston/desktop.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/rootston/desktop.c b/rootston/desktop.c
index df8a79f2..2448ffac 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -150,7 +150,6 @@ void view_setup(struct roots_view *view) {
 	struct roots_input *input = view->desktop->server->input;
 	view_center(view);
 	set_view_focus(input, view->desktop, view);
-	wlr_seat_keyboard_notify_enter(input->wl_seat, view->wlr_surface);
 	struct wlr_box before;
 	view_get_size(view, &before);
 	view_update_output(view, &before);

From aafb00a15fd84b6d40f2efa52333eea5633b14e5 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Fri, 10 Nov 2017 08:21:23 -0500
Subject: [PATCH 14/14] Fix centering views on scaled outputs

---
 rootston/desktop.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/rootston/desktop.c b/rootston/desktop.c
index 2448ffac..78bd271a 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -136,8 +136,6 @@ bool view_center(struct roots_view *view) {
 
 	int width, height;
 	wlr_output_effective_resolution(output, &width, &height);
-	width /= output->scale;
-	height /= output->scale;
 
 	double view_x = (double)(width - box.width) / 2 + l_output->x;
 	double view_y = (double)(height - box.height) / 2 + l_output->y;