resolution.c (1963B)
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 "client.h" 21#include "resolution.h" 22 23#include <guacamole/user.h> 24 25int guac_rdp_resolution_reasonable(guac_user* user, int resolution) { 26 27 int width = user->info.optimal_width; 28 int height = user->info.optimal_height; 29 30 /* Convert user pixels to remote pixels */ 31 width = width * resolution / user->info.optimal_resolution; 32 height = height * resolution / user->info.optimal_resolution; 33 34 /* 35 * Resolution is reasonable if the same as the user optimal resolution 36 * OR if the resulting display area is reasonable 37 */ 38 return user->info.optimal_resolution == resolution 39 || width*height >= GUAC_RDP_REASONABLE_AREA; 40 41} 42 43int guac_rdp_suggest_resolution(guac_user* user) { 44 45 /* Prefer RDP's native resolution */ 46 if (guac_rdp_resolution_reasonable(user, GUAC_RDP_NATIVE_RESOLUTION)) 47 return GUAC_RDP_NATIVE_RESOLUTION; 48 49 /* If native resolution is too tiny, try higher resolution */ 50 if (guac_rdp_resolution_reasonable(user, GUAC_RDP_HIGH_RESOLUTION)) 51 return GUAC_RDP_HIGH_RESOLUTION; 52 53 /* Fallback to user-suggested resolution */ 54 return user->info.optimal_resolution; 55 56} 57