Add virtual pointer backend

include/pointer.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2019 Andri Yngvason
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <neatvnc.h>
+#include "wlr-virtual-pointer-unstable-v1.h"
+
+struct pointer {
+	struct nvnc* vnc;
+	struct zwlr_virtual_pointer_manager_v1* manager;
+	struct zwlr_virtual_pointer_v1* pointer;
+
+	enum nvnc_button_mask current_mask;
+
+	uint32_t current_x;
+	uint32_t current_y;
+
+	uint32_t width;
+	uint32_t height;
+};
+
+int pointer_init(struct pointer* self);
+void pointer_destroy(struct pointer* self);
+
+void pointer_set(struct pointer* self, uint32_t x, uint32_t y,
+		 enum nvnc_button_mask button_mask);

meson.build

@@ -46,6 +46,7 @@ sources = [
 	'src/shm.c',
 	'src/screencopy.c',
 	'src/output.c',
+	'src/pointer.c',
 ]
 
 dependencies = [

src/main.c

@@ -33,12 +33,14 @@
 
 #include "wlr-export-dmabuf-unstable-v1.h"
 #include "wlr-screencopy-unstable-v1.h"
+#include "wlr-virtual-pointer-unstable-v1.h"
 #include "render.h"
 #include "dmabuf.h"
 #include "screencopy.h"
 #include "strlcpy.h"
 #include "logging.h"
 #include "output.h"
+#include "pointer.h"
 
 enum frame_capture_backend_type {
 	FRAME_CAPTURE_BACKEND_NONE = 0,
@@ -57,6 +59,7 @@ struct wayvnc {
 	struct dmabuf_capture dmabuf_backend;
 	struct screencopy screencopy_backend;
 	struct frame_capture* capture_backend;
+	struct pointer pointer_backend;
 
 	uv_poll_t wayland_poller;
 	uv_prepare_t flusher;
@@ -138,6 +141,14 @@ static void registry_add(void* data, struct wl_registry* registry,
 					 2);
 		return;
 	}
+
+	if (strcmp(interface, zwlr_virtual_pointer_manager_v1_interface.name) == 0) {
+		self->pointer_backend.manager =
+			wl_registry_bind(registry, id,
+					 &zwlr_virtual_pointer_manager_v1_interface,
+					 1);
+		return;
+	}
 }
 
 static void registry_remove(void* data, struct wl_registry* registry,
@@ -157,7 +168,11 @@ static void registry_remove(void* data, struct wl_registry* registry,
 void wayvnc_destroy(struct wayvnc* self)
 {
 	output_list_destroy(&self->outputs);
+	zwlr_virtual_pointer_manager_v1_destroy(self->pointer_backend.manager);
+	if (self->dmabuf_backend.manager) {
+		pointer_destroy(&self->pointer_backend);
 		zwlr_export_dmabuf_manager_v1_destroy(self->dmabuf_backend.manager);
+	}
 	wl_display_disconnect(self->display);
 }
 
@@ -195,6 +210,14 @@ static int init_wayland(struct wayvnc* self)
 	self->screencopy_backend.frame_capture.on_done = on_capture_done;
 	self->screencopy_backend.frame_capture.userdata = self;
 
+	if (self->pointer_backend.manager) {
+		self->pointer_backend.vnc = self->nvnc;
+		pointer_init(&self->pointer_backend);
+	} else {
+		log_error("Compositor does not support %s.\n",
+			  zwlr_virtual_pointer_manager_v1_interface.name);
+	}
+
 	return 0;
 
 export_manager_failure:
@@ -271,6 +294,17 @@ uint32_t fourcc_from_gl_format(uint32_t format)
 	return DRM_FORMAT_INVALID;
 }
 
+static void on_pointer_event(struct nvnc_client* client, uint16_t x, uint16_t y,
+			     enum nvnc_button_mask button_mask)
+{
+	// TODO: Have a seat per client
+
+	struct nvnc* nvnc = nvnc_get_server(client);
+	struct wayvnc* wayvnc = nvnc_get_userdata(nvnc);
+
+	pointer_set(&wayvnc->pointer_backend, x, y, button_mask);
+}
+
 int init_nvnc(struct wayvnc* self, const char* addr, uint16_t port)
 {
 	self->nvnc = nvnc_open(addr, port);
@@ -289,6 +323,9 @@ int init_nvnc(struct wayvnc* self, const char* addr, uint16_t port)
 			    self->selected_output->height,
 			    format);
 
+	if (self->pointer_backend.manager)
+		nvnc_set_pointer_fn(self->nvnc, on_pointer_event);
+
 	return 0;
 }
 
@@ -493,6 +530,12 @@ int main(int argc, char* argv[])
 	self.dmabuf_backend.fc.wl_output = out->wl_output;
 	self.screencopy_backend.frame_capture.wl_output = out->wl_output;
 
+	if (self.pointer_backend.manager) {
+		self.pointer_backend.width = out->width;
+		self.pointer_backend.height = out->height;
+	}
+
+
 	if (renderer_init(&self.renderer, self.selected_output->width,
 			  self.selected_output->height) < 0) {
 		log_error("Failed to initialise renderer\n");

src/pointer.c

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2019 Andri Yngvason
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <stdint.h>
+#include <wayland-client-protocol.h>
+#include <wayland-client.h>
+#include <time.h>
+#include <linux/input-event-codes.h>
+
+#include "pointer.h"
+#include "wlr-virtual-pointer-unstable-v1.h"
+
+static inline uint32_t gettime_ms(void)
+{
+	struct timespec ts = { 0 };
+	clock_gettime(CLOCK_MONOTONIC, &ts);
+	return ts.tv_sec * 1000UL + ts.tv_nsec / 1000000UL;
+}
+
+int pointer_init(struct pointer* self)
+{
+	self->pointer =
+		zwlr_virtual_pointer_manager_v1_create_virtual_pointer(self->manager, NULL);
+
+	zwlr_virtual_pointer_v1_axis_source(self->pointer,
+					    WL_POINTER_AXIS_SOURCE_WHEEL);
+	return 0;
+}
+
+void pointer_destroy(struct pointer* self)
+{
+	zwlr_virtual_pointer_v1_destroy(self->pointer);
+}
+
+static void pointer_set_button_mask(struct pointer* self, uint32_t t,
+				    enum nvnc_button_mask mask)
+{
+	enum nvnc_button_mask diff = self->current_mask ^ mask;
+
+	if (diff & NVNC_BUTTON_LEFT)
+		zwlr_virtual_pointer_v1_button(self->pointer, t, BTN_LEFT,
+					       !!(mask & NVNC_BUTTON_LEFT));
+	if (diff & NVNC_BUTTON_MIDDLE)
+		zwlr_virtual_pointer_v1_button(self->pointer, t, BTN_MIDDLE,
+					       !!(mask & NVNC_BUTTON_MIDDLE));
+	if (diff & NVNC_BUTTON_RIGHT)
+		zwlr_virtual_pointer_v1_button(self->pointer, t, BTN_RIGHT,
+					       !!(mask & NVNC_BUTTON_RIGHT));
+
+	if ((diff & NVNC_SCROLL_UP) && !(mask & NVNC_SCROLL_UP))
+		zwlr_virtual_pointer_v1_axis(self->pointer, t,
+					     WL_POINTER_AXIS_VERTICAL_SCROLL,
+					     1);
+
+	if ((diff & NVNC_SCROLL_DOWN) && !(mask & NVNC_SCROLL_DOWN))
+		zwlr_virtual_pointer_v1_axis(self->pointer, t,
+					     WL_POINTER_AXIS_VERTICAL_SCROLL,
+					     1);
+	
+	self->current_mask = mask;
+}
+
+void pointer_set(struct pointer* self, uint32_t x, uint32_t y,
+		 enum nvnc_button_mask button_mask)
+{
+	uint32_t t = gettime_ms();
+
+	if (x != self->current_x || y != self->current_y)
+		zwlr_virtual_pointer_v1_motion_absolute(self->pointer, t, x, y,
+							self->width,
+							self->height);
+
+	self->current_x = x;
+	self->current_y = y;
+
+	if (button_mask != self->current_mask)
+		pointer_set_button_mask(self, t, button_mask);
+}