cscg24-guacamole

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

instruction-copy.c (3270B)

      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 "display.h"
     22#include "log.h"
     23
     24#include <guacamole/client.h>
     25
     26#include <stdlib.h>
     27
     28int guacenc_handle_copy(guacenc_display* display, int argc, char** argv) {
     29
     30    /* Verify argument count */
     31    if (argc < 9) {
     32        guacenc_log(GUAC_LOG_WARNING, "\"copy\" instruction incomplete");
     33        return 1;
     34    }
     35
     36    /* Parse arguments */
     37    int sindex = atoi(argv[0]);
     38    int sx = atoi(argv[1]);
     39    int sy = atoi(argv[2]);
     40    int width = atoi(argv[3]);
     41    int height = atoi(argv[4]);
     42    int mask = atoi(argv[5]);
     43    int dindex = atoi(argv[6]);
     44    int dx = atoi(argv[7]);
     45    int dy = atoi(argv[8]);
     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    /* Pull buffer of destination layer/buffer */
     53    guacenc_buffer* dst = guacenc_display_get_related_buffer(display, dindex);
     54    if (dst == NULL)
     55        return 1;
     56
     57    /* Expand the destination buffer as necessary to fit the draw operation */
     58    if (dst->autosize)
     59        guacenc_buffer_fit(dst, dx + width, dy + height);
     60
     61    /* Copy rectangle from source to destination */
     62    if (src->surface != NULL && dst->cairo != NULL) {
     63
     64        /* If surfaces are different, no need to copy */
     65        cairo_surface_t* surface;
     66        if (src != dst)
     67            surface = src->surface;
     68
     69        /* Otherwise, copy to a temporary surface */
     70        else {
     71
     72            /* Create new surface to hold the source rect */
     73            surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
     74                    width, height);
     75
     76            /* Copy relevant rectangle from source surface */
     77            cairo_t* cairo = cairo_create(surface);
     78            cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
     79            cairo_set_source_surface(cairo, src->surface, -sx, -sy);
     80            cairo_paint(cairo);
     81            cairo_destroy(cairo);
     82
     83            /* Source coordinates are now (0, 0) */
     84            sx = sy = 0;
     85
     86        }
     87
     88        /* Perform copy */
     89        cairo_set_operator(dst->cairo, guacenc_display_cairo_operator(mask));
     90        cairo_set_source_surface(dst->cairo, surface, dx - sx, dy - sy);
     91        cairo_rectangle(dst->cairo, dx, dy, width, height);
     92        cairo_fill(dst->cairo);
     93
     94        /* Destroy temporary surface if it was created */
     95        if (surface != src->surface)
     96            cairo_surface_destroy(surface);
     97
     98    }
     99
    100    return 0;
    101
    102}
    103