cscg24-guacamole

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

display-layers.c (2885B)

      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 "layer.h"
     23#include "log.h"
     24
     25#include <guacamole/client.h>
     26
     27#include <stdlib.h>
     28
     29guacenc_layer* guacenc_display_get_layer(guacenc_display* display,
     30        int index) {
     31
     32    /* Do not lookup / allocate if index is invalid */
     33    if (index < 0 || index >= GUACENC_DISPLAY_MAX_LAYERS) {
     34        guacenc_log(GUAC_LOG_WARNING, "Layer index out of bounds: %i", index);
     35        return NULL;
     36    }
     37
     38    /* Lookup layer, allocating a new layer if necessary */
     39    guacenc_layer* layer = display->layers[index];
     40    if (layer == NULL) {
     41
     42        /* Attempt to allocate layer */
     43        layer = guacenc_layer_alloc();
     44        if (layer == NULL) {
     45            guacenc_log(GUAC_LOG_WARNING, "Layer allocation failed");
     46            return NULL;
     47        }
     48
     49        /* The default layer has no parent */
     50        if (index == 0)
     51            layer->parent_index = GUACENC_LAYER_NO_PARENT;
     52
     53        /* Store layer within display for future retrieval / management */
     54        display->layers[index] = layer;
     55
     56    }
     57
     58    return layer;
     59
     60}
     61
     62int guacenc_display_get_depth(guacenc_display* display, guacenc_layer* layer) {
     63
     64    /* Non-existent layers have a depth of 0 */
     65    if (layer == NULL)
     66        return 0;
     67
     68    /* Layers with no parent have a depth of 0 */
     69    if (layer->parent_index == GUACENC_LAYER_NO_PARENT)
     70        return 0;
     71
     72    /* Retrieve parent layer */
     73    guacenc_layer* parent =
     74        guacenc_display_get_layer(display, layer->parent_index);
     75
     76    /* Current layer depth is the depth of the parent + 1 */
     77    return guacenc_display_get_depth(display, parent) + 1;
     78
     79}
     80
     81int guacenc_display_free_layer(guacenc_display* display,
     82        int index) {
     83
     84    /* Do not lookup / free if index is invalid */
     85    if (index < 0 || index >= GUACENC_DISPLAY_MAX_LAYERS) {
     86        guacenc_log(GUAC_LOG_WARNING, "Layer index out of bounds: %i", index);
     87        return 1;
     88    }
     89
     90    /* Free layer (if allocated) */
     91    guacenc_layer_free(display->layers[index]);
     92
     93    /* Mark layer as freed */
     94    display->layers[index] = NULL;
     95
     96    return 0;
     97
     98}
     99