xref: /OK3568_Linux_fs/buildroot/package/gstreamer1/gst1-plugins-bad/0032-waylandsink-Support-pointer-and-touch.patch (revision 4882a59341e53eb6f0b4789bf948001014eff981)

From 75c7ee95b6d561ee0030cfe5d7680b1fb48041b1 Mon Sep 17 00:00:00 2001
From: Jeffy Chen <jeffy.chen@rock-chips.com>
Date: Thu, 5 May 2022 17:56:46 +0800
Subject: [PATCH 32/41] waylandsink: Support pointer and touch

Based on weston's client window and simple-egl.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
---
 gst-libs/gst/wayland/gstwldisplay.c | 293 ++++++++++++++++++++++++++++
 gst-libs/gst/wayland/gstwldisplay.h |   4 +
 gst-libs/gst/wayland/gstwlwindow.c  |  17 ++
 gst-libs/gst/wayland/gstwlwindow.h  |   4 +
 gst-libs/gst/wayland/meson.build    |   7 +-
 5 files changed, 322 insertions(+), 3 deletions(-)

diff --git a/gst-libs/gst/wayland/gstwldisplay.c b/gst-libs/gst/wayland/gstwldisplay.c
index 3e11211..b860a8c 100644
--- a/gst-libs/gst/wayland/gstwldisplay.c
+++ b/gst-libs/gst/wayland/gstwldisplay.c
@@ -23,6 +23,7 @@
 #endif

 #include "gstwldisplay.h"
+#include "gstwlwindow.h"

 #include "fullscreen-shell-unstable-v1-client-protocol.h"
 #include "linux-dmabuf-unstable-v1-client-protocol.h"
@@ -30,6 +31,9 @@
 #include "xdg-shell-client-protocol.h"

 #include <errno.h>
+#include <linux/input.h>
+
+#include <wayland-cursor.h>

 #define GST_CAT_DEFAULT gst_wl_display_debug
 GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
@@ -41,6 +45,13 @@ typedef struct _GstWlDisplayPrivate
   struct wl_display *display_wrapper;
   struct wl_event_queue *queue;

+  struct wl_list input_list;
+
+  struct wl_cursor_theme *cursor_theme;
+  struct wl_cursor *default_cursor;
+  struct wl_surface *cursor_surface;
+  struct wl_surface *touch_surface;
+
   /* globals */
   struct wl_registry *registry;
   struct wl_compositor *compositor;
@@ -72,6 +83,14 @@ G_DEFINE_TYPE_WITH_CODE (GstWlDisplay, gst_wl_display, G_TYPE_OBJECT,
         "wldisplay", 0, "wldisplay library");
     );

+void
+gst_wl_display_set_touch_surface (GstWlDisplay * self,
+    struct wl_surface *touch_surface)
+{
+  GstWlDisplayPrivate *priv = gst_wl_display_get_instance_private (self);
+  priv->touch_surface = touch_surface;
+}
+
 gboolean
 gst_wl_display_support_afbc (GstWlDisplay * self)
 {
@@ -88,6 +107,18 @@ gst_wl_display_support_nv12_10le40 (GstWlDisplay * self)

 static void gst_wl_display_finalize (GObject * gobject);

+struct input
+{
+  GstWlDisplay *display;
+  struct wl_seat *seat;
+  struct wl_pointer *pointer;
+  struct wl_touch *touch;
+
+  void *pointer_focus;
+
+  struct wl_list link;
+};
+
 static void
 gst_wl_display_class_init (GstWlDisplayClass * klass)
 {
@@ -117,6 +148,30 @@ gst_wl_ref_wl_buffer (gpointer key, gpointer value, gpointer user_data)
   g_object_ref (value);
 }

+static void
+input_destroy (struct input *input)
+{
+  if (input->touch)
+    wl_touch_destroy (input->touch);
+  if (input->pointer)
+    wl_pointer_destroy (input->pointer);
+
+  wl_list_remove (&input->link);
+  wl_seat_destroy (input->seat);
+  free (input);
+}
+
+static void
+display_destroy_inputs (GstWlDisplay * self)
+{
+  GstWlDisplayPrivate *priv = gst_wl_display_get_instance_private (self);
+  struct input *tmp;
+  struct input *input;
+
+  wl_list_for_each_safe (input, tmp, &priv->input_list, link)
+      input_destroy (input);
+}
+
 static void
 gst_wl_display_finalize (GObject * gobject)
 {
@@ -127,6 +182,14 @@ gst_wl_display_finalize (GObject * gobject)
   if (priv->thread)
     g_thread_join (priv->thread);

+  display_destroy_inputs (self);
+
+  if (priv->cursor_surface)
+    wl_surface_destroy (priv->cursor_surface);
+
+  if (priv->cursor_theme)
+    wl_cursor_theme_destroy (priv->cursor_theme);
+
   /* to avoid buffers being unregistered from another thread
    * at the same time, take their ownership */
   g_mutex_lock (&priv->buffers_mutex);
@@ -284,6 +347,222 @@ static const struct xdg_wm_base_listener xdg_wm_base_listener = {
   handle_xdg_wm_base_ping
 };

+static void
+display_set_cursor (GstWlDisplay *self, struct wl_pointer *pointer,
+    uint32_t serial)
+{
+  GstWlDisplayPrivate *priv = gst_wl_display_get_instance_private (self);
+  struct wl_buffer *buffer;
+  struct wl_cursor_image *image;
+
+  if (!priv->default_cursor)
+    return;
+
+  if (!priv->cursor_surface) {
+      priv->cursor_surface =
+          wl_compositor_create_surface (priv->compositor);
+      if (!priv->cursor_surface)
+        return;
+  }
+
+  image = priv->default_cursor->images[0];
+  buffer = wl_cursor_image_get_buffer (image);
+  if (!buffer)
+    return;
+
+  wl_pointer_set_cursor (pointer, serial,
+      priv->cursor_surface, image->hotspot_x, image->hotspot_y);
+  wl_surface_attach (priv->cursor_surface, buffer, 0, 0);
+  wl_surface_damage (priv->cursor_surface, 0, 0,
+      image->width, image->height);
+  wl_surface_commit (priv->cursor_surface);
+}
+
+static void
+pointer_handle_enter (void *data, struct wl_pointer *pointer,
+    uint32_t serial, struct wl_surface *surface,
+    wl_fixed_t sx_w, wl_fixed_t sy_w)
+{
+  struct input *input = data;
+  GstWlDisplay *self = input->display;
+  GstWlDisplayPrivate *priv = gst_wl_display_get_instance_private (self);
+  GstWlWindow *window;
+
+  if (!surface) {
+    /* enter event for a window we've just destroyed */
+    return;
+  }
+
+  if (surface != priv->touch_surface) {
+    /* Ignoring input event from other surfaces */
+    return;
+  }
+
+  window = wl_surface_get_user_data (surface);
+  if (!window || !gst_wl_window_is_toplevel (window)) {
+    /* Ignoring input event from subsurface */
+    return;
+  }
+
+  input->pointer_focus = window;
+  display_set_cursor (self, pointer, serial);
+}
+
+static void
+pointer_handle_leave (void *data, struct wl_pointer *pointer,
+    uint32_t serial, struct wl_surface *surface)
+{
+  struct input *input = data;
+
+  if (input->pointer_focus) {
+    input->pointer_focus = NULL;
+    wl_pointer_set_cursor (pointer, serial, NULL, 0, 0);
+  }
+}
+
+static void
+pointer_handle_motion (void *data, struct wl_pointer *pointer,
+    uint32_t time, wl_fixed_t sx, wl_fixed_t sy)
+{
+}
+
+static void
+pointer_handle_button (void *data, struct wl_pointer *pointer, uint32_t serial,
+    uint32_t time, uint32_t button, uint32_t state)
+{
+  struct input *input = data;
+  GstWlWindow *window;
+
+  window = input->pointer_focus;
+  if (!window)
+    return;
+
+  if (button == BTN_LEFT && state == WL_POINTER_BUTTON_STATE_PRESSED)
+    gst_wl_window_toplevel_move (window, input->seat, serial);
+}
+
+static void
+pointer_handle_axis (void *data, struct wl_pointer *wl_pointer,
+    uint32_t time, uint32_t axis, wl_fixed_t value)
+{
+}
+
+static const struct wl_pointer_listener pointer_listener = {
+  pointer_handle_enter,
+  pointer_handle_leave,
+  pointer_handle_motion,
+  pointer_handle_button,
+  pointer_handle_axis,
+};
+
+static void
+touch_handle_down (void *data, struct wl_touch *wl_touch,
+    uint32_t serial, uint32_t time, struct wl_surface *surface,
+    int32_t id, wl_fixed_t x_w, wl_fixed_t y_w)
+{
+  struct input *input = data;
+  GstWlDisplay *self = input->display;
+  GstWlDisplayPrivate *priv = gst_wl_display_get_instance_private (self);
+  GstWlWindow *window;
+
+  if (!surface) {
+    /* enter event for a window we've just destroyed */
+    return;
+  }
+
+  if (surface != priv->touch_surface) {
+    /* Ignoring input event from other surfaces */
+    return;
+  }
+
+  window = wl_surface_get_user_data (surface);
+  if (!window || !gst_wl_window_is_toplevel (window)) {
+    /* Ignoring input event from subsurface */
+    return;
+  }
+
+  gst_wl_window_toplevel_move (window, input->seat, serial);
+}
+
+static void
+touch_handle_up (void *data, struct wl_touch *wl_touch,
+    uint32_t serial, uint32_t time, int32_t id)
+{
+}
+
+static void
+touch_handle_motion (void *data, struct wl_touch *wl_touch,
+    uint32_t time, int32_t id, wl_fixed_t x_w, wl_fixed_t y_w)
+{
+}
+
+static void
+touch_handle_frame (void *data, struct wl_touch *wl_touch)
+{
+}
+
+static void
+touch_handle_cancel (void *data, struct wl_touch *wl_touch)
+{
+}
+
+static const struct wl_touch_listener touch_listener = {
+  touch_handle_down,
+  touch_handle_up,
+  touch_handle_motion,
+  touch_handle_frame,
+  touch_handle_cancel,
+};
+
+static void
+seat_handle_capabilities (void *data, struct wl_seat *seat,
+    enum wl_seat_capability caps)
+{
+  struct input *input = data;
+
+  if ((caps & WL_SEAT_CAPABILITY_POINTER) && !input->pointer) {
+    input->pointer = wl_seat_get_pointer (seat);
+    wl_pointer_add_listener (input->pointer, &pointer_listener, input);
+  } else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && input->pointer) {
+    wl_pointer_destroy (input->pointer);
+    input->pointer = NULL;
+  }
+
+  if ((caps & WL_SEAT_CAPABILITY_TOUCH) && !input->touch) {
+    input->touch = wl_seat_get_touch (seat);
+    wl_touch_add_listener (input->touch, &touch_listener, input);
+  } else if (!(caps & WL_SEAT_CAPABILITY_TOUCH) && input->touch) {
+    wl_touch_destroy (input->touch);
+    input->touch = NULL;
+  }
+}
+
+static const struct wl_seat_listener seat_listener = {
+  seat_handle_capabilities,
+};
+
+static void
+display_add_input (GstWlDisplay *self, uint32_t id)
+{
+  GstWlDisplayPrivate *priv = gst_wl_display_get_instance_private (self);
+  struct input *input;
+
+  input = calloc (1, sizeof (*input));
+  if (input == NULL) {
+    GST_ERROR ("Error out of memory");
+    return;
+  }
+
+  input->display = self;
+
+  input->seat = wl_registry_bind (priv->registry, id, &wl_seat_interface, 1);
+
+  wl_seat_add_listener (input->seat, &seat_listener, input);
+  wl_seat_set_user_data (input->seat, input);
+
+  wl_list_insert (priv->input_list.prev, &input->link);
+}
+
 static void
 registry_handle_global (void *data, struct wl_registry *registry,
     uint32_t id, const char *interface, uint32_t version)
@@ -307,6 +586,18 @@ registry_handle_global (void *data, struct wl_registry *registry,
   } else if (g_strcmp0 (interface, "wl_shm") == 0) {
     priv->shm = wl_registry_bind (registry, id, &wl_shm_interface, 1);
     wl_shm_add_listener (priv->shm, &shm_listener, self);
+
+    priv->cursor_theme = wl_cursor_theme_load (NULL, 32, priv->shm);
+    if (!priv->cursor_theme) {
+      GST_ERROR ("Error loading default cursor theme");
+    } else {
+      priv->default_cursor =
+          wl_cursor_theme_get_cursor (priv->cursor_theme, "left_ptr");
+      if (!priv->default_cursor)
+        GST_ERROR ("Error loading default left cursor pointer");
+    }
+  } else if (g_strcmp0 (interface, "wl_seat") == 0) {
+    display_add_input (self, id);
   } else if (g_strcmp0 (interface, "wp_viewporter") == 0) {
     priv->viewporter =
         wl_registry_bind (registry, id, &wp_viewporter_interface, 1);
@@ -400,6 +691,8 @@ gst_wl_display_new_existing (struct wl_display * display,
   priv->display_wrapper = wl_proxy_create_wrapper (display);
   priv->own_display = take_ownership;

+  wl_list_init (&priv->input_list);
+
   priv->queue = wl_display_create_queue (priv->display);
   wl_proxy_set_queue ((struct wl_proxy *) priv->display_wrapper, priv->queue);
   priv->registry = wl_display_get_registry (priv->display_wrapper);
diff --git a/gst-libs/gst/wayland/gstwldisplay.h b/gst-libs/gst/wayland/gstwldisplay.h
index c130b79..c6b4c8d 100644
--- a/gst-libs/gst/wayland/gstwldisplay.h
+++ b/gst-libs/gst/wayland/gstwldisplay.h
@@ -35,6 +35,10 @@ struct _GstWlDisplay
   GObject parent_instance;
 };

+GST_WL_API
+void gst_wl_display_set_touch_surface (GstWlDisplay * self,
+    struct wl_surface *touch_surface);
+
 GST_WL_API
 gboolean gst_wl_display_support_afbc (GstWlDisplay * self);

diff --git a/gst-libs/gst/wayland/gstwlwindow.c b/gst-libs/gst/wayland/gstwlwindow.c
index df60a67..f55778d 100644
--- a/gst-libs/gst/wayland/gstwlwindow.c
+++ b/gst-libs/gst/wayland/gstwlwindow.c
@@ -96,6 +96,19 @@ static void gst_wl_window_finalize (GObject * gobject);

 static void gst_wl_window_update_borders (GstWlWindow * self);

+void
+gst_wl_window_toplevel_move (GstWlWindow * self,
+    struct wl_seat *seat, uint32_t serial)
+{
+  GstWlWindowPrivate *priv;
+
+  if (!gst_wl_window_is_toplevel (self))
+    return;
+
+  priv = gst_wl_window_get_instance_private (self);
+  xdg_toplevel_move (priv->xdg_toplevel, seat, serial);
+}
+
 static void
 handle_xdg_toplevel_close (void *data, struct xdg_toplevel *xdg_toplevel)
 {
@@ -227,6 +240,8 @@ gst_wl_window_new_internal (GstWlDisplay * display, GMutex * render_lock)
   priv->area_surface = wl_compositor_create_surface (compositor);
   priv->video_surface = wl_compositor_create_surface (compositor);

+  gst_wl_display_set_touch_surface (display, priv->area_surface);
+
   priv->area_surface_wrapper = wl_proxy_create_wrapper (priv->area_surface);
   priv->video_surface_wrapper = wl_proxy_create_wrapper (priv->video_surface);

@@ -368,6 +383,8 @@ gst_wl_window_new_toplevel (GstWlDisplay * display, const GstVideoInfo * info,
   self = gst_wl_window_new_internal (display, render_lock);
   priv = gst_wl_window_get_instance_private (self);

+  wl_surface_set_user_data (priv->area_surface, self);
+
   xdg_wm_base = gst_wl_display_get_xdg_wm_base (display);
   fullscreen_shell = gst_wl_display_get_fullscreen_shell_v1 (display);

diff --git a/gst-libs/gst/wayland/gstwlwindow.h b/gst-libs/gst/wayland/gstwlwindow.h
index 8f02f00..9425666 100644
--- a/gst-libs/gst/wayland/gstwlwindow.h
+++ b/gst-libs/gst/wayland/gstwlwindow.h
@@ -47,6 +47,10 @@ struct _GstWlWindow
   GObject parent_instance;
 };

+GST_WL_API
+void gst_wl_window_toplevel_move (GstWlWindow * self,
+        struct wl_seat *seat, uint32_t serial);
+
 GST_WL_API
 void gst_wl_window_ensure_crop (GstWlWindow * self,
         gint x, gint y, gint w, gint h);
diff --git a/gst-libs/gst/wayland/meson.build b/gst-libs/gst/wayland/meson.build
index 3aa63cb..9c958d7 100644
--- a/gst-libs/gst/wayland/meson.build
+++ b/gst-libs/gst/wayland/meson.build
@@ -1,10 +1,11 @@
 wl_req = '>= 1.15'
 wl_client_dep = dependency('wayland-client', version: wl_req, required: get_option('wayland'))
+wl_cursor_dep = dependency('wayland-cursor', version: wl_req, required: get_option('wayland'))
 libdrm_dep = dependency('libdrm', version: '>= 2.4.55', required: get_option('wayland'))
 wl_protocol_dep = dependency('wayland-protocols', version: wl_req, required: get_option('wayland'))
 wl_scanner = find_program('wayland-scanner', required: get_option('wayland'))
 # Also used in ext/wayland
-use_wayland = wl_protocol_dep.found() and wl_client_dep.found() and wl_scanner.found() and libdrm_dep.found()
+use_wayland = wl_protocol_dep.found() and wl_client_dep.found() and wl_cursor_dep.found() and wl_scanner.found() and libdrm_dep.found()

 if use_wayland
   wl_sources = [
@@ -74,7 +75,7 @@ if use_wayland
     darwin_versions : osxversion,
     install : true,
     dependencies : [gst_dep, gstallocators_dep, gstvideo_dep, libdrm_dep,
-                    wl_client_dep, wl_protocol_dep]
+                    wl_client_dep, wl_cursor_dep, wl_protocol_dep]
   )

   pkg_name = 'gstreamer-wayland-1.0'
@@ -90,7 +91,7 @@ if use_wayland
   gstwayland_dep = declare_dependency(link_with : gstwayland,
     include_directories : [libsinc],
     dependencies : [gst_dep, gstallocators_dep, gstvideo_dep, libdrm_dep,
-                    wl_client_dep, wl_protocol_dep])
+                    wl_client_dep, wl_cursor_dep, wl_protocol_dep])

   install_headers(wl_headers, subdir: 'gstreamer-1.0/gst/wayland')
   meson.override_dependency(pkg_name, gstwayland_dep)
--
2.20.1