guacamole-spice-protocol/src/common/blank_cursor.c

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/*
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
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* http://www.apache.org/licenses/LICENSE-2.0
*
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* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
#include "config.h"
#include <cairo/cairo.h>
#include <guacamole/client.h>
#include <guacamole/layer.h>
#include <guacamole/protocol.h>
#include <guacamole/socket.h>
#include <guacamole/user.h>
/* Dimensions */
const int guac_common_blank_cursor_width = 1;
const int guac_common_blank_cursor_height = 1;
/* Format */
const cairo_format_t guac_common_blank_cursor_format = CAIRO_FORMAT_ARGB32;
const int guac_common_blank_cursor_stride = 4;
/* Embedded blank cursor graphic */
unsigned char guac_common_blank_cursor[] = {
0x00,0x00,0x00,0x00
};
void guac_common_set_blank_cursor(guac_user* user) {
guac_client* client = user->client;
guac_socket* socket = user->socket;
/* Draw to buffer */
guac_layer* cursor = guac_client_alloc_buffer(client);
cairo_surface_t* graphic = cairo_image_surface_create_for_data(
guac_common_blank_cursor,
guac_common_blank_cursor_format,
guac_common_blank_cursor_width,
guac_common_blank_cursor_height,
guac_common_blank_cursor_stride);
guac_user_stream_png(user, socket, GUAC_COMP_SRC, cursor,
0, 0, graphic);
cairo_surface_destroy(graphic);
/* Set cursor */
guac_protocol_send_cursor(socket, 0, 0, cursor, 0, 0,
guac_common_blank_cursor_width,
guac_common_blank_cursor_height);
/* Free buffer */
guac_client_free_buffer(client, cursor);
guac_client_log(client, GUAC_LOG_DEBUG,
"Client cursor image set to generic transparent (blank) cursor.");
}