cscg24-guacamole

CSCG 2024 Challenge 'Guacamole Mashup'
git clone https://git.sinitax.com/sinitax/cscg24-guacamole
Log | Files | Refs | sfeed.txt

instruction-cursor.c (2182B)

      1/*
      2 * Licensed to the Apache Software Foundation (ASF) under one
      3 * or more contributor license agreements.  See the NOTICE file
      4 * distributed with this work for additional information
      5 * regarding copyright ownership.  The ASF licenses this file
      6 * to you under the Apache License, Version 2.0 (the
      7 * "License"); you may not use this file except in compliance
      8 * with the License.  You may obtain a copy of the License at
      9 *
     10 *   http://www.apache.org/licenses/LICENSE-2.0
     11 *
     12 * Unless required by applicable law or agreed to in writing,
     13 * software distributed under the License is distributed on an
     14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     15 * KIND, either express or implied.  See the License for the
     16 * specific language governing permissions and limitations
     17 * under the License.
     18 */
     19
     20#include "config.h"
     21#include "buffer.h"
     22#include "cursor.h"
     23#include "display.h"
     24#include "log.h"
     25
     26#include <guacamole/client.h>
     27
     28#include <stdlib.h>
     29
     30int guacenc_handle_cursor(guacenc_display* display, int argc, char** argv) {
     31
     32    /* Verify argument count */
     33    if (argc < 7) {
     34        guacenc_log(GUAC_LOG_WARNING, "\"cursor\" instruction incomplete");
     35        return 1;
     36    }
     37
     38    /* Parse arguments */
     39    int hotspot_x = atoi(argv[0]);
     40    int hotspot_y = atoi(argv[1]);
     41    int sindex = atoi(argv[2]);
     42    int sx = atoi(argv[3]);
     43    int sy = atoi(argv[4]);
     44    int width = atoi(argv[5]);
     45    int height = atoi(argv[6]);
     46
     47    /* Pull buffer of source layer/buffer */
     48    guacenc_buffer* src = guacenc_display_get_related_buffer(display, sindex);
     49    if (src == NULL)
     50        return 1;
     51
     52    /* Update cursor hotspot */
     53    guacenc_cursor* cursor = display->cursor;
     54    cursor->hotspot_x = hotspot_x;
     55    cursor->hotspot_y = hotspot_y;
     56
     57    /* Resize cursor to exactly fit */
     58    guacenc_buffer_resize(cursor->buffer, width, height);
     59
     60    /* Copy rectangle from source to cursor */
     61    guacenc_buffer* dst = cursor->buffer;
     62    if (src->surface != NULL && dst->cairo != NULL) {
     63        cairo_set_operator(dst->cairo, CAIRO_OPERATOR_SOURCE);
     64        cairo_set_source_surface(dst->cairo, src->surface, sx, sy);
     65        cairo_paint(dst->cairo);
     66    }
     67
     68    return 0;
     69
     70}
     71