Migrate to cacheable cursors.

protocols/ssh/Makefile.am

@@ -42,12 +42,14 @@ lib_LTLIBRARIES = libguac-client-ssh.la
 
 libguac_client_ssh_la_SOURCES = \
     src/ibar.c                  \
+    src/cursor.c                \
     src/ssh_client.c            \
     src/ssh_handlers.c          \
     src/terminal.c              \
     src/terminal_handlers.c
 
 noinst_HEADERS =                \
+    include/cursor.h            \
     include/ibar.h              \
     include/ssh_client.h        \
     include/ssh_handlers.h      \

protocols/ssh/include/cursor.h

@@ -0,0 +1,89 @@
+
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is libguac-client-ssh.
+ *
+ * The Initial Developer of the Original Code is
+ * Michael Jumper.
+ * Portions created by the Initial Developer are Copyright (C) 2011
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef _GUAC_SSH_CURSOR_H
+#define _GUAC_SSH_CURSOR_H
+
+#include <guacamole/client.h>
+
+typedef struct guac_ssh_cursor {
+
+    /**
+     * A buffer allocated with guac_client_alloc_buffer() that contains the
+     * cursor image.
+     */
+    guac_layer* buffer;
+
+    /**
+     * The width of the cursor in pixels.
+     */
+    int width;
+
+    /**
+     * The height of the cursor in pixels.
+     */
+    int height;
+
+    /**
+     * The X coordinate of the cursor hotspot.
+     */
+    int hotspot_x;
+
+    /**
+     * The Y coordinate of the cursor hotspot.
+     */
+    int hotspot_y;
+
+} guac_ssh_cursor;
+
+/**
+ * Allocates a new cursor, pre-populating the cursor with a newly-allocated
+ * buffer.
+ */
+guac_ssh_cursor* guac_ssh_cursor_alloc(guac_client* client);
+
+/**
+ * Frees the buffer associated with this cursor as well as the cursor itself.
+ */
+void guac_ssh_cursor_free(guac_client* client, guac_ssh_cursor* cursor);
+
+/**
+ * Set the remote cursor.
+ */
+void guac_ssh_set_cursor(guac_client* client, guac_ssh_cursor* cursor);
+
+#endif

protocols/ssh/include/ibar.h

@@ -67,10 +67,11 @@ extern const cairo_format_t guac_ssh_ibar_format;
 extern unsigned char guac_ssh_ibar[];
 
 /**
- * Set the cursor of the remote display to the embedded cursor graphic.
+ * Creates a new I-bar cursor, returning the corresponding cursor object.
  *
  * @param client The guac_client to send the cursor to.
+ * @return A new cursor which must be free'd via guac_ssh_cursor_free()/
  */
-void guac_ssh_set_ibar(guac_client* client);
+guac_ssh_cursor* guac_ssh_create_ibar(guac_client* client);
 
 #endif

protocols/ssh/include/ssh_client.h

@@ -46,6 +46,7 @@
 #include "ssh_client.h"
 #include "ssh_handlers.h"
 #include "terminal.h"
+#include "cursor.h"
 
 typedef struct ssh_guac_client_data {
 
@@ -62,6 +63,16 @@ typedef struct ssh_guac_client_data {
     int mod_ctrl;
     int mouse_mask;
 
+    /**
+     * The cached I-bar cursor.
+     */
+    guac_ssh_cursor* ibar_cursor;
+
+    /**
+     * The current cursor, used to avoid re-setting the cursor.
+     */
+    guac_ssh_cursor* current_cursor;
+
 } ssh_guac_client_data;
 
 int ssh_guac_client_auth(guac_client* client, const char* password);

protocols/ssh/src/cursor.c

@@ -0,0 +1,74 @@
+
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is libguac-client-ssh.
+ *
+ * The Initial Developer of the Original Code is
+ * Michael Jumper.
+ * Portions created by the Initial Developer are Copyright (C) 2011
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <stdlib.h>
+
+#include <guacamole/client.h>
+#include <guacamole/protocol.h>
+
+#include "cursor.h"
+
+guac_ssh_cursor* guac_ssh_cursor_alloc(guac_client* client) {
+
+    /* Alloc new cursor, initialize buffer */
+    guac_ssh_cursor* cursor = malloc(sizeof(guac_ssh_cursor));
+    cursor->buffer = guac_client_alloc_buffer(client);
+
+    return cursor;
+
+}
+
+void guac_ssh_cursor_free(guac_client* client, guac_ssh_cursor* cursor) {
+
+    /* Free buffer */
+    guac_client_free_buffer(client, cursor->buffer);
+
+    /* Free cursor */
+    free(cursor);
+
+}
+
+void guac_ssh_set_cursor(guac_client* client, guac_ssh_cursor* cursor) {
+
+    /* Set cursor */
+    guac_protocol_send_cursor(client->socket,
+            cursor->hotspot_x, cursor->hotspot_y,
+            cursor->buffer,
+            0, 0, cursor->width, cursor->height);
+
+}
+

protocols/ssh/src/ibar.c

@@ -40,6 +40,8 @@
 #include <guacamole/protocol.h>
 #include <guacamole/socket.h>
 
+#include "cursor.h"
+
 /* Macros for prettying up the embedded image. */
 #define X 0x00,0x00,0x00,0xFF
 #define U 0x80,0x80,0x80,0xFF
@@ -77,13 +79,12 @@ unsigned char guac_ssh_ibar[] = {
 };
 
 
-void guac_ssh_set_ibar(guac_client* client) {
+guac_ssh_cursor* guac_ssh_create_ibar(guac_client* client) {
 
     guac_socket* socket = client->socket;
+    guac_ssh_cursor* cursor = guac_ssh_cursor_alloc(client);
 
     /* Draw to buffer */
-    guac_layer* cursor = guac_client_alloc_buffer(client);
-
     cairo_surface_t* graphic = cairo_image_surface_create_for_data(
             guac_ssh_ibar,
             guac_ssh_ibar_format,
@@ -91,20 +92,17 @@ void guac_ssh_set_ibar(guac_client* client) {
             guac_ssh_ibar_height,
             guac_ssh_ibar_stride);
 
-    guac_protocol_send_png(socket, GUAC_COMP_SRC, cursor, 0, 0, graphic);
+    guac_protocol_send_png(socket, GUAC_COMP_SRC, cursor->buffer,
+            0, 0, graphic);
     cairo_surface_destroy(graphic);
 
-    /* Set cursor */
-    guac_protocol_send_cursor(socket,
-            guac_ssh_ibar_width / 2,
-            guac_ssh_ibar_height / 2,
-            cursor,
-            0, 0,
-            guac_ssh_ibar_width,
-            guac_ssh_ibar_height);
+    /* Initialize cursor properties */
+    cursor->width = guac_ssh_ibar_width;
+    cursor->height = guac_ssh_ibar_height;
+    cursor->hotspot_x = guac_ssh_ibar_width / 2;
+    cursor->hotspot_y = guac_ssh_ibar_height / 2;
 
-    /* Free buffer */
-    guac_client_free_buffer(client, cursor);
+    return cursor;
 
 }
 

protocols/ssh/src/ssh_client.c

@@ -116,6 +116,10 @@ int guac_client_init(guac_client* client, int argc, char** argv) {
     client_data->mod_ctrl = 0;
     client_data->clipboard_data = NULL;
 
+    /* Setup I-bar pointer */
+    client_data->current_cursor =
+    client_data->ibar_cursor    = guac_ssh_create_ibar(client);
+
     /* Send name and dimensions */
     guac_protocol_send_name(socket, "SSH TEST");
     guac_protocol_send_size(socket,
@@ -124,7 +128,7 @@ int guac_client_init(guac_client* client, int argc, char** argv) {
             term->char_height * term->term_height);
 
     /* Send I-bar pointer */
-    guac_ssh_set_ibar(client);
+    guac_ssh_set_cursor(client, client_data->ibar_cursor);
 
     guac_socket_flush(socket);