screenshooter: Add agl-screenshooter protocol

Just like weston, we add a private protocol. Underneath we make use of
the weston renderer to get a hold of the pixels and transfer them to a
user-supplied buffer. This only brings up the server side implementation
of the protocol.

Bug-AGL: SPEC-3580

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Change-Id: I02a07ad5eb492ef2ecad74efb34d1453ebcbedc0

3 files changed, 140 insertions, 0 deletions

diff --git a/src/ivi-compositor.h b/src/ivi-compositor.h
index 6969a7d..4506a5a 100644
--- a/src/ivi-compositor.h
+++ b/src/ivi-compositor.h
@@ -377,5 +377,7 @@ ivi_layout_find_with_app_id(const char *app_id, struct ivi_compositor *ivi);
 void
 shell_advertise_app_state(struct ivi_compositor *ivi, const char *app_id,
 			  const char *data, uint32_t app_state);
+void
+ivi_screenshooter_create(struct ivi_compositor *ivi);
 
 #endif
diff --git a/src/main.c b/src/main.c
index 99512d5..164b45b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1493,6 +1493,7 @@ int main(int argc, char *argv[])
 
 	ivi_shell_create_global(&ivi);
 	ivi_launch_shell_client(&ivi);
+	ivi_screenshooter_create(&ivi);
 	ivi_agl_systemd_notify(&ivi);
 
 	wl_display_run(display);
diff --git a/src/screenshooter.c b/src/screenshooter.c
new file mode 100644
index 0000000..ef3d32e
--- /dev/null
+++ b/src/screenshooter.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright © 2020 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.
+ */
+
+#include "ivi-compositor.h"
+#include "shared/helpers.h"
+
+#include <libweston/libweston.h>
+#include "agl-screenshooter-server-protocol.h"
+#include <libweston/weston-log.h>
+
+struct screenshooter {
+	struct ivi_compositor *ivi;
+	struct wl_global *global;
+	struct wl_client *client;
+	struct wl_listener destroy_listener;
+};
+
+static void
+screenshooter_done(void *data, enum weston_screenshooter_outcome outcome)
+{
+	struct wl_resource *resource = data;
+
+	if (outcome == WESTON_SCREENSHOOTER_NO_MEMORY) {
+		wl_resource_post_no_memory(resource);
+		return;
+	}
+
+	agl_screenshooter_send_done(resource, outcome);
+}
+
+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 =
+		weston_head_from_resource(output_resource)->output;
+	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);
+}
+
+static void
+screenshooter_destructor_destroy(struct wl_client *client,
+		                 struct wl_resource *global_resource)
+{
+	wl_resource_destroy(global_resource);
+}
+
+struct agl_screenshooter_interface screenshooter_implementation = {
+	screenshooter_shoot,
+	screenshooter_destructor_destroy
+};
+
+static void
+bind_shooter(struct wl_client *client,
+	     void *data, uint32_t version, uint32_t id)
+{
+	struct screenshooter *shooter = data;
+	struct wl_resource *resource;
+	bool debug_enabled = true;
+
+	resource = wl_resource_create(client,
+				      &agl_screenshooter_interface, 1, id);
+
+	if (!debug_enabled && !shooter->client) {
+		wl_resource_post_error(resource, WL_DISPLAY_ERROR_INVALID_OBJECT,
+				       "screenshooter failed: permission denied. "\
+				       "Debug must be enabled");
+		return;
+	}
+
+	wl_resource_set_implementation(resource, &screenshooter_implementation,
+				       data, NULL);
+}
+
+static void
+screenshooter_destroy(struct wl_listener *listener, void *data)
+{
+	struct screenshooter *shooter =
+		container_of(listener, struct screenshooter, destroy_listener);
+
+	wl_list_remove(&shooter->destroy_listener.link);
+
+	wl_global_destroy(shooter->global);
+	free(shooter);
+}
+
+void
+ivi_screenshooter_create(struct ivi_compositor *ivi)
+{
+	struct weston_compositor *ec = ivi->compositor;
+	struct screenshooter *shooter;
+
+	shooter = zalloc(sizeof(*shooter));
+	if (shooter == NULL)
+		return;
+
+	shooter->ivi = ivi;
+	shooter->global = wl_global_create(ec->wl_display,
+					   &agl_screenshooter_interface, 1,
+					   shooter, bind_shooter);
+
+	shooter->destroy_listener.notify = screenshooter_destroy;
+	wl_signal_add(&ec->destroy_signal, &shooter->destroy_listener);
+
+	weston_log("Screenshooter interface created\n");
+}