1 /* 2 * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #ifdef HEADLESS 27 #error This file should not be included in headless library 28 #endif 29 30 #include <dlfcn.h> 31 #include <stdlib.h> 32 #include "jvm_md.h" 33 #include "gtk_interface.h" 34 35 GtkApi* gtk2_load(JNIEnv *env, const char* lib_name); 36 GtkApi* gtk3_load(JNIEnv *env, const char* lib_name); 37 38 gboolean gtk2_check(const char* lib_name, gboolean load); 39 gboolean gtk3_check(const char* lib_name, gboolean load); 40 41 GtkApi *gtk; 42 43 typedef struct { 44 GtkVersion version; 45 const char* name; 46 const char* vname; 47 GtkApi* (*load)(JNIEnv *env, const char* lib_name); 48 gboolean (*check)(const char* lib_name, gboolean load); 49 } GtkLib; 50 51 static GtkLib gtk_libs[] = { 52 { 53 GTK_3, 54 JNI_LIB_NAME("gtk-3"), 55 VERSIONED_JNI_LIB_NAME("gtk-3", "0"), 56 >k3_load, 57 >k3_check 58 }, 59 { 60 GTK_2, 61 JNI_LIB_NAME("gtk-x11-2.0"), 62 VERSIONED_JNI_LIB_NAME("gtk-x11-2.0", "0"), 63 >k2_load, 64 >k2_check 65 } 66 }; 67 68 static GtkLib** get_libs_order(GtkVersion version) { 69 static GtkLib** load_order; 70 static int n_libs = 0; 71 if (!n_libs) { 72 n_libs = sizeof(gtk_libs) / sizeof(GtkLib); 73 load_order = calloc(n_libs + 1, sizeof(GtkLib *)); 74 if (load_order == NULL) { 75 return NULL; 76 } 77 } 78 int i, first = 0; 79 for (i = 0; i < n_libs; i++) { 80 load_order[i] = >k_libs[i]; 81 if (load_order[i]->version == version) { 82 first = i; 83 } 84 } 85 if (first) { 86 for (i = first; i > 0; i--) { 87 load_order[i] = load_order[i - 1]; 88 } 89 load_order[0] = >k_libs[first]; 90 } 91 return load_order; 92 } 93 94 static GtkLib* get_loaded() { 95 GtkLib** libs = get_libs_order(GTK_ANY); 96 if (libs == NULL) return NULL; 97 while(!gtk && *libs) { 98 GtkLib* lib = *libs++; 99 if (lib->check(lib->vname, /* load = */FALSE)) { 100 return lib; 101 } 102 if (lib->check(lib->name, /* load = */FALSE)) { 103 return lib; 104 } 105 } 106 return NULL; 107 } 108 109 gboolean gtk_load(JNIEnv *env, GtkVersion version, gboolean verbose) { 110 if (gtk == NULL) { 111 GtkLib* lib = get_loaded(); 112 if (lib) { 113 if (verbose) { 114 fprintf(stderr, "Looking for GTK%d library...\n", 115 lib->version); 116 } 117 gtk = lib->load(env, lib->vname); 118 if (!gtk) { 119 gtk = lib->load(env, lib->name); 120 } 121 } else { 122 GtkLib** libs = get_libs_order(version); 123 while (!gtk && libs && *libs) { 124 lib = *libs++; 125 if (version == GTK_ANY || lib->version == version) { 126 if (verbose) { 127 fprintf(stderr, "Looking for GTK%d library...\n", 128 lib->version); 129 } 130 gtk = lib->load(env, lib->vname); 131 if (!gtk) { 132 gtk = lib->load(env, lib->name); 133 } 134 if (verbose && !gtk) { 135 fprintf(stderr, "Not found.\n"); 136 } 137 } 138 } 139 } 140 if (verbose) { 141 if (gtk) { 142 fprintf(stderr, "GTK%d library loaded.\n", lib->version); 143 } else { 144 fprintf(stderr, "Failed to load GTK library.\n"); 145 } 146 } 147 } 148 return gtk != NULL; 149 } 150 151 static gboolean check_version(GtkVersion version) { 152 GtkLib** libs = get_libs_order(version); 153 if (libs == NULL) return FALSE; 154 while (*libs) { 155 GtkLib* lib = *libs++; 156 if (lib->check(lib->vname, /* load = */TRUE)) { 157 return TRUE; 158 } 159 if (lib->check(lib->name, /* load = */TRUE)) { 160 return TRUE; 161 } 162 } 163 return FALSE; 164 } 165 166 gboolean gtk_check_version(GtkVersion version) { 167 if (gtk || get_loaded()) { 168 return TRUE; 169 } 170 return check_version(version); 171 } 172