Move the code launching the screenshooter client and implementing
the screenshot protocol out of libweston, and make screenshooter.c
a generic way to hook screenshoot protocols into weston.
A new header weston.h is added, with an entry point for the shells
to init the screenshooter.
---
 Makefile.am           |   9 ++-
 desktop-shell/shell.c |   1 +
 src/compositor.h      |   5 +-
 src/screenshooter.c   | 173 ++++++++------------------------------------------
 src/weston.c          | 160 ++++++++++++++++++++++++++++++++++++++++++++++
 src/weston.h          |  36 +++++++++++
 6 files changed, 233 insertions(+), 151 deletions(-)
 create mode 100644 src/weston.h

diff --git a/Makefile.am b/Makefile.am
index 0ea322b..b1d1044 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -96,8 +96,6 @@ libweston_@ABI_VERSION@_la_SOURCES =                  \
        src/weston-egl-ext.h
 
 nodist_libweston_@ABI_VERSION@_la_SOURCES =            \
-       protocol/screenshooter-protocol.c               \
-       protocol/screenshooter-server-protocol.h        \
        protocol/text-cursor-position-protocol.c        \
        protocol/text-cursor-position-server-protocol.h \
        protocol/text-protocol.c                        \
@@ -124,6 +122,7 @@ weston_LDADD = $(COMPOSITOR_LIBS) $(LIBUNWIND_LIBS) \
 
 weston_SOURCES =                                       \
        src/weston.c                                    \
+       src/weston.h                                    \
        src/compositor-x11.h                            \
        src/compositor-wayland.h                        \
        src/compositor-drm.h                            \
@@ -133,6 +132,12 @@ weston_SOURCES =                                   \
        src/compositor-rpi.h                            \
        shared/helpers.h
 
+nodist_weston_SOURCES =                                        \
+       protocol/screenshooter-protocol.c               \
+       protocol/screenshooter-server-protocol.h
+
+BUILT_SOURCES += $(nodist_weston_SOURCES)
+
 # Track this dependency explicitly instead of using BUILT_SOURCES.  We
 # add BUILT_SOURCES to CLEANFILES, but we want to keep git-version.h
 # in case we're building from tarballs.
diff --git a/desktop-shell/shell.c b/desktop-shell/shell.c
index c0c7ca9..c1cc192 100644
--- a/desktop-shell/shell.c
+++ b/desktop-shell/shell.c
@@ -36,6 +36,7 @@
 #include <sys/types.h>
 
 #include "shell.h"
+#include "weston.h"
 #include "desktop-shell-server-protocol.h"
 #include "workspaces-server-protocol.h"
 #include "shared/config-parser.h"
diff --git a/src/compositor.h b/src/compositor.h
index 3e8ed80..2def1a0 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -1466,7 +1466,10 @@ int
 tty_activate_vt(struct tty *tty, int vt);
 
 void
-screenshooter_create(struct weston_compositor *ec);
+weston_recorder_start(struct weston_compositor *ec,
+                     struct weston_output *output);
+void
+weston_recorder_stop(struct weston_compositor *ec);
 
 enum weston_screenshooter_outcome {
        WESTON_SCREENSHOOTER_SUCCESS,
diff --git a/src/screenshooter.c b/src/screenshooter.c
index b7b8dce..efe7c8f 100644
--- a/src/screenshooter.c
+++ b/src/screenshooter.c
@@ -34,19 +34,10 @@
 #include <sys/uio.h>
 
 #include "compositor.h"
-#include "screenshooter-server-protocol.h"
 #include "shared/helpers.h"
 
 #include "wcap/wcap-decode.h"
 
-struct screenshooter {
-       struct weston_compositor *ec;
-       struct wl_global *global;
-       struct wl_client *client;
-       struct weston_process process;
-       struct wl_listener destroy_listener;
-};
-
 struct screenshooter_frame_listener {
        struct wl_listener listener;
        struct weston_buffer *buffer;
@@ -216,98 +207,6 @@ weston_screenshooter_shoot(struct weston_output *output,
        return 0;
 }
 
-static void
-screenshooter_done(void *data, enum weston_screenshooter_outcome outcome)
-{
-       struct wl_resource *resource = data;
-
-       switch (outcome) {
-       case WESTON_SCREENSHOOTER_SUCCESS:
-               screenshooter_send_done(resource);
-               break;
-       case WESTON_SCREENSHOOTER_NO_MEMORY:
-               wl_resource_post_no_memory(resource);
-               break;
-       default:
-               break;
-       }
-}
-
-static void
-screenshooter_shoot(struct wl_client *client,
-                   struct wl_resource *resource,
-                   struct wl_resource *output_resource,
-                   struct wl_resource *buffer_resource)
-{
-       struct weston_output *output =
-               wl_resource_get_user_data(output_resource);
-       struct weston_buffer *buffer =
-               weston_buffer_from_resource(buffer_resource);
-
-       if (buffer == NULL) {
-               wl_resource_post_no_memory(resource);
-               return;
-       }
-
-       weston_screenshooter_shoot(output, buffer, screenshooter_done, 
resource);
-}
-
-struct screenshooter_interface screenshooter_implementation = {
-       screenshooter_shoot
-};
-
-static void
-bind_shooter(struct wl_client *client,
-            void *data, uint32_t version, uint32_t id)
-{
-       struct screenshooter *shooter = data;
-       struct wl_resource *resource;
-
-       resource = wl_resource_create(client,
-                                     &screenshooter_interface, 1, id);
-
-       if (client != shooter->client) {
-               wl_resource_post_error(resource, 
WL_DISPLAY_ERROR_INVALID_OBJECT,
-                                      "screenshooter failed: permission 
denied");
-               return;
-       }
-
-       wl_resource_set_implementation(resource, &screenshooter_implementation,
-                                      data, NULL);
-}
-
-static void
-screenshooter_sigchld(struct weston_process *process, int status)
-{
-       struct screenshooter *shooter =
-               container_of(process, struct screenshooter, process);
-
-       shooter->client = NULL;
-}
-
-static void
-screenshooter_binding(struct weston_seat *seat, uint32_t time, uint32_t key,
-                     void *data)
-{
-       struct screenshooter *shooter = data;
-       char *screenshooter_exe;
-       int ret;
-
-       ret = asprintf(&screenshooter_exe, "%s/%s",
-                      weston_config_get_libexec_dir(),
-                      "/weston-screenshooter");
-       if (ret < 0) {
-               weston_log("Could not construct screenshooter path.\n");
-               return;
-       }
-
-       if (!shooter->client)
-               shooter->client = weston_client_launch(shooter->ec,
-                                       &shooter->process,
-                                       screenshooter_exe, 
screenshooter_sigchld);
-       free(screenshooter_exe);
-}
-
 struct weston_recorder {
        struct weston_output *output;
        uint32_t *frame, *rect;
@@ -559,14 +458,11 @@ weston_recorder_destroy(struct weston_recorder *recorder)
        weston_recorder_free(recorder);
 }
 
-static void
-recorder_binding(struct weston_seat *seat, uint32_t time, uint32_t key, void 
*data)
+static struct weston_recorder *
+get_recorder(struct weston_compositor *ec)
 {
-       struct weston_compositor *ec = seat->compositor;
        struct weston_output *output;
        struct wl_listener *listener = NULL;
-       struct weston_recorder *recorder;
-       static const char filename[] = "capture.wcap";
 
        wl_list_for_each(output, &ec->output_list, link) {
                listener = wl_signal_get(&output->frame_signal,
@@ -576,59 +472,40 @@ recorder_binding(struct weston_seat *seat, uint32_t time, 
uint32_t key, void *da
        }
 
        if (listener) {
-               recorder = container_of(listener, struct weston_recorder,
-                                       frame_listener);
+               return container_of(listener, struct weston_recorder,
+                                   frame_listener);
+       }
+       return NULL;
+}
 
-               weston_log(
-                       "stopping recorder, total file size %dM, %d frames\n",
-                       recorder->total / (1024 * 1024), recorder->count);
+WL_EXPORT void
+weston_recorder_start(struct weston_compositor *ec,
+                     struct weston_output *output)
+{
+       struct weston_recorder *recorder = get_recorder(ec);
+       static const char filename[] = "capture.wcap";
 
-               recorder->destroying = 1;
-               weston_output_schedule_repaint(recorder->output);
+       if (recorder) {
+               // Already running, do nothing;
+               return;
        } else {
-               if (seat->keyboard && seat->keyboard->focus &&
-                   seat->keyboard->focus->output)
-                       output = seat->keyboard->focus->output;
-               else
-                       output = container_of(ec->output_list.next,
-                                             struct weston_output, link);
-
                weston_log("starting recorder for output %s, file %s\n",
                           output->name, filename);
                weston_recorder_create(output, filename);
        }
 }
 
-static void
-screenshooter_destroy(struct wl_listener *listener, void *data)
-{
-       struct screenshooter *shooter =
-               container_of(listener, struct screenshooter, destroy_listener);
-
-       wl_global_destroy(shooter->global);
-       free(shooter);
-}
-
 WL_EXPORT void
-screenshooter_create(struct weston_compositor *ec)
+weston_recorder_stop(struct weston_compositor *ec)
 {
-       struct screenshooter *shooter;
+       struct weston_recorder *recorder = get_recorder(ec);
 
-       shooter = malloc(sizeof *shooter);
-       if (shooter == NULL)
-               return;
-
-       shooter->ec = ec;
-       shooter->client = NULL;
-
-       shooter->global = wl_global_create(ec->wl_display,
-                                          &screenshooter_interface, 1,
-                                          shooter, bind_shooter);
-       weston_compositor_add_key_binding(ec, KEY_S, MODIFIER_SUPER,
-                                         screenshooter_binding, shooter);
-       weston_compositor_add_key_binding(ec, KEY_R, MODIFIER_SUPER,
-                                         recorder_binding, shooter);
+       if (recorder) {
+               weston_log(
+                       "stopping recorder, total file size %dM, %d frames\n",
+                       recorder->total / (1024 * 1024), recorder->count);
 
-       shooter->destroy_listener.notify = screenshooter_destroy;
-       wl_signal_add(&ec->destroy_signal, &shooter->destroy_listener);
+               recorder->destroying = 1;
+               weston_output_schedule_repaint(recorder->output);
+       }
 }
diff --git a/src/weston.c b/src/weston.c
index b103137..4c7faab 100644
--- a/src/weston.c
+++ b/src/weston.c
@@ -37,6 +37,7 @@
 #include <sys/wait.h>
 #include <sys/time.h>
 #include <sys/socket.h>
+#include <linux/input.h>
 
 #ifdef HAVE_LIBUNWIND
 #define UNW_LOCAL_ONLY
@@ -44,10 +45,12 @@
 #endif
 
 #include "compositor.h"
+#include "weston.h"
 #include "../shared/os-compatibility.h"
 #include "../shared/helpers.h"
 #include "git-version.h"
 #include "version.h"
+#include "screenshooter-server-protocol.h"
 
 #include "compositor-wayland.h"
 #include "compositor-x11.h"
@@ -59,6 +62,14 @@
 
 #define WINDOW_TITLE "Weston Compositor"
 
+struct screenshooter {
+       struct weston_compositor *ec;
+       struct wl_global *global;
+       struct wl_client *client;
+       struct weston_process process;
+       struct wl_listener destroy_listener;
+};
+
 static struct wl_list child_process_list;
 static struct weston_compositor *segv_compositor;
 
@@ -165,6 +176,155 @@ vlog_continue(const char *fmt, va_list argp)
        return vfprintf(weston_logfile, fmt, argp);
 }
 
+static void
+screenshooter_done(void *data, enum weston_screenshooter_outcome outcome)
+{
+       struct wl_resource *resource = data;
+
+       switch (outcome) {
+       case WESTON_SCREENSHOOTER_SUCCESS:
+               screenshooter_send_done(resource);
+               break;
+       case WESTON_SCREENSHOOTER_NO_MEMORY:
+               wl_resource_post_no_memory(resource);
+               break;
+       default:
+               break;
+       }
+}
+
+static void
+screenshooter_shoot(struct wl_client *client,
+                   struct wl_resource *resource,
+                   struct wl_resource *output_resource,
+                   struct wl_resource *buffer_resource)
+{
+       struct weston_output *output =
+               wl_resource_get_user_data(output_resource);
+       struct weston_buffer *buffer =
+               weston_buffer_from_resource(buffer_resource);
+
+       if (buffer == NULL) {
+               wl_resource_post_no_memory(resource);
+               return;
+       }
+
+       weston_screenshooter_shoot(output, buffer, screenshooter_done, 
resource);
+}
+
+struct screenshooter_interface screenshooter_implementation = {
+       screenshooter_shoot
+};
+
+static void
+bind_shooter(struct wl_client *client,
+            void *data, uint32_t version, uint32_t id)
+{
+       struct screenshooter *shooter = data;
+       struct wl_resource *resource;
+
+       resource = wl_resource_create(client,
+                                     &screenshooter_interface, 1, id);
+
+       if (client != shooter->client) {
+               wl_resource_post_error(resource, 
WL_DISPLAY_ERROR_INVALID_OBJECT,
+                                      "screenshooter failed: permission 
denied");
+               return;
+       }
+
+       wl_resource_set_implementation(resource, &screenshooter_implementation,
+                                      data, NULL);
+}
+
+static void
+screenshooter_sigchld(struct weston_process *process, int status)
+{
+       struct screenshooter *shooter =
+               container_of(process, struct screenshooter, process);
+
+       shooter->client = NULL;
+}
+
+static void
+screenshooter_binding(struct weston_seat *seat, uint32_t time, uint32_t key,
+                     void *data)
+{
+       struct screenshooter *shooter = data;
+       char *screenshooter_exe;
+       int ret;
+
+       ret = asprintf(&screenshooter_exe, "%s/%s",
+                      weston_config_get_libexec_dir(),
+                      "weston-screenshooter");
+       if (ret < 0) {
+               weston_log("Could not construct screenshooter path.\n");
+               return;
+       }
+
+       if (!shooter->client)
+               shooter->client = weston_client_launch(shooter->ec,
+                                       &shooter->process,
+                                       screenshooter_exe, 
screenshooter_sigchld);
+       free(screenshooter_exe);
+}
+
+static void
+recorder_binding(struct weston_seat *seat, uint32_t time, uint32_t key, void 
*data)
+{
+       struct weston_compositor *ec = seat->compositor;
+       struct weston_output *output;
+       int *running = data;
+
+       if (*running == 1) {
+               weston_recorder_stop(ec);
+               *running = 0;
+       } else {
+               if (seat->keyboard && seat->keyboard->focus &&
+                   seat->keyboard->focus->output)
+                       output = seat->keyboard->focus->output;
+               else
+                       output = container_of(ec->output_list.next,
+                                             struct weston_output, link);
+
+               weston_recorder_start(ec, output);
+               *running = 1;
+       }
+}
+
+static void
+screenshooter_destroy(struct wl_listener *listener, void *data)
+{
+       struct screenshooter *shooter =
+               container_of(listener, struct screenshooter, destroy_listener);
+
+       wl_global_destroy(shooter->global);
+       free(shooter);
+}
+
+WL_EXPORT void
+screenshooter_create(struct weston_compositor *ec)
+{
+       static int recorder_running = 0;
+       struct screenshooter *shooter;
+
+       shooter = malloc(sizeof *shooter);
+       if (shooter == NULL)
+               return;
+
+       shooter->ec = ec;
+       shooter->client = NULL;
+
+       shooter->global = wl_global_create(ec->wl_display,
+                                          &screenshooter_interface, 1,
+                                          shooter, bind_shooter);
+       weston_compositor_add_key_binding(ec, KEY_S, MODIFIER_SUPER,
+                                         screenshooter_binding, shooter);
+       weston_compositor_add_key_binding(ec, KEY_R, MODIFIER_SUPER,
+                                         recorder_binding, &recorder_running);
+
+       shooter->destroy_listener.notify = screenshooter_destroy;
+       wl_signal_add(&ec->destroy_signal, &shooter->destroy_listener);
+}
 
 #ifdef HAVE_LIBUNWIND
 
diff --git a/src/weston.h b/src/weston.h
new file mode 100644
index 0000000..52929cd
--- /dev/null
+++ b/src/weston.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright © 2010-2011 Intel Corporation
+ * Copyright © 2008-2011 Kristian Høgsberg
+ * Copyright © 2012-2015 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef WESTON_WESTON_H
+#define WESTON_WESTON_H
+
+struct weston_compositor;
+
+void
+screenshooter_create(struct weston_compositor *ec);
+
+#endif
-- 
2.4.4

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