| /* |
| * 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 |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * 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 "display.h" |
| #include "buffer.h" |
| #include "layer.h" |
| #include "log.h" |
| |
| #include <guacamole/client.h> |
| |
| #include <stdlib.h> |
| |
| guacenc_buffer* guacenc_display_get_buffer(guacenc_display* display, |
| int index) { |
| |
| /* Transform index to buffer space */ |
| int internal_index = -index - 1; |
| |
| /* Do not lookup / allocate if index is invalid */ |
| if (internal_index < 0 || internal_index >= GUACENC_DISPLAY_MAX_BUFFERS) { |
| guacenc_log(GUAC_LOG_WARNING, "Buffer index out of bounds: %i", index); |
| return NULL; |
| } |
| |
| /* Lookup buffer, allocating a new buffer if necessary */ |
| guacenc_buffer* buffer = display->buffers[internal_index]; |
| if (buffer == NULL) { |
| |
| /* Attempt to allocate buffer */ |
| buffer = guacenc_buffer_alloc(); |
| if (buffer == NULL) { |
| guacenc_log(GUAC_LOG_WARNING, "Buffer allocation failed"); |
| return NULL; |
| } |
| |
| /* All non-layer buffers must autosize */ |
| buffer->autosize = true; |
| |
| /* Store buffer within display for future retrieval / management */ |
| display->buffers[internal_index] = buffer; |
| |
| } |
| |
| return buffer; |
| |
| } |
| |
| int guacenc_display_free_buffer(guacenc_display* display, |
| int index) { |
| |
| /* Transform index to buffer space */ |
| int internal_index = -index - 1; |
| |
| /* Do not lookup / free if index is invalid */ |
| if (internal_index < 0 || internal_index >= GUACENC_DISPLAY_MAX_BUFFERS) { |
| guacenc_log(GUAC_LOG_WARNING, "Buffer index out of bounds: %i", index); |
| return 1; |
| } |
| |
| /* Free buffer (if allocated) */ |
| guacenc_buffer_free(display->buffers[internal_index]); |
| |
| /* Mark buffer as freed */ |
| display->buffers[internal_index] = NULL; |
| |
| return 0; |
| |
| } |
| |
| guacenc_buffer* guacenc_display_get_related_buffer(guacenc_display* display, |
| int index) { |
| |
| /* Retrieve underlying buffer of layer if a layer is requested */ |
| if (index >= 0) { |
| |
| /* Retrieve / allocate layer (if possible */ |
| guacenc_layer* layer = guacenc_display_get_layer(display, index); |
| if (layer == NULL) |
| return NULL; |
| |
| /* Return underlying buffer */ |
| return layer->buffer; |
| |
| } |
| |
| /* Otherwise retrieve buffer directly */ |
| return guacenc_display_get_buffer(display, index); |
| |
| } |
| |