layer.c (2009B)
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 "layer.h" 23 24#include <guacamole/mem.h> 25 26#include <stdlib.h> 27 28guacenc_layer* guacenc_layer_alloc() { 29 30 /* Allocate new layer */ 31 guacenc_layer* layer = (guacenc_layer*) guac_mem_zalloc(sizeof(guacenc_layer)); 32 if (layer == NULL) 33 return NULL; 34 35 /* Allocate associated buffer (width, height, and image storage) */ 36 layer->buffer = guacenc_buffer_alloc(); 37 if (layer->buffer == NULL) { 38 guac_mem_free(layer); 39 return NULL; 40 } 41 42 /* Allocate buffer for frame rendering */ 43 layer->frame = guacenc_buffer_alloc(); 44 if (layer->frame== NULL) { 45 guacenc_buffer_free(layer->buffer); 46 guac_mem_free(layer); 47 return NULL; 48 } 49 50 /* Layers default to fully opaque */ 51 layer->opacity = 0xFF; 52 53 /* Default parented to default layer */ 54 layer->parent_index = 0; 55 56 return layer; 57 58} 59 60void guacenc_layer_free(guacenc_layer* layer) { 61 62 /* Ignore NULL layers */ 63 if (layer == NULL) 64 return; 65 66 /* Free internal frame buffer */ 67 guacenc_buffer_free(layer->frame); 68 69 /* Free underlying buffer */ 70 guacenc_buffer_free(layer->buffer); 71 72 guac_mem_free(layer); 73 74} 75