1 /* 2 * Copyright (c) 2005, 2019, 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 #include <dlfcn.h> 26 #include <stdlib.h> 27 #include "jvm_md.h" 28 #include "gtk_interface.h" 29 30 GtkApi* gtk2_load(JNIEnv *env, const char* lib_name); 31 GtkApi* gtk3_load(JNIEnv *env, const char* lib_name); 32 33 gboolean gtk2_check(const char* lib_name, gboolean load); 34 gboolean gtk3_check(const char* lib_name, gboolean load); 35 36 GtkApi *gtk; 37 38 typedef struct { 39 GtkVersion version; 40 const char* name; 41 const char* vname; 42 GtkApi* (*load)(JNIEnv *env, const char* lib_name); 43 gboolean (*check)(const char* lib_name, gboolean load); 44 } GtkLib; 45 46 static GtkLib gtk_libs[] = { 47 { 48 GTK_3, 49 JNI_LIB_NAME("gtk-3"), 50 VERSIONED_JNI_LIB_NAME("gtk-3", "0"), 51 >k3_load, 52 >k3_check 53 }, 54 { 55 GTK_2, 56 JNI_LIB_NAME("gtk-x11-2.0"), 57 VERSIONED_JNI_LIB_NAME("gtk-x11-2.0", "0"), 58 >k2_load, 59 >k2_check 60 } 61 }; 62 63 static GtkLib** get_libs_order(GtkVersion version) { 64 static GtkLib** load_order; 65 static int n_libs = 0; 66 if (!n_libs) { 67 n_libs = sizeof(gtk_libs) / sizeof(GtkLib); 68 load_order = calloc(n_libs + 1, sizeof(GtkLib *)); 69 if (load_order == NULL) { 70 return NULL; 71 } 72 } 73 int i, first = 0; 74 for (i = 0; i < n_libs; i++) { 75 load_order[i] = >k_libs[i]; 76 if (load_order[i]->version == version) { 77 first = i; 78 } 79 } 80 if (first) { 81 for (i = first; i > 0; i--) { 82 load_order[i] = load_order[i - 1]; 83 } 84 load_order[0] = >k_libs[first]; 85 } 86 return load_order; 87 } 88 89 static GtkLib* get_loaded() { 90 GtkLib** libs = get_libs_order(GTK_ANY); 91 if (libs == NULL) return NULL; 92 while(!gtk && *libs) { 93 GtkLib* lib = *libs++; 94 if (lib->check(lib->vname, /* load = */FALSE)) { 95 return lib; 96 } 97 if (lib->check(lib->name, /* load = */FALSE)) { 98 return lib; 99 } 100 } 101 return NULL; 102 } 103 104 gboolean gtk_load(JNIEnv *env, GtkVersion version, gboolean verbose) { 105 if (gtk == NULL) { 106 GtkLib* lib = get_loaded(); 107 if (lib) { 108 if (verbose) { 109 fprintf(stderr, "Looking for GTK%d library...\n", 110 lib->version); 111 } 112 gtk = lib->load(env, lib->vname); 113 if (!gtk) { 114 gtk = lib->load(env, lib->name); 115 } 116 } else { 117 GtkLib** libs = get_libs_order(version); 118 while (!gtk && libs && *libs) { 119 lib = *libs++; 120 if (version == GTK_ANY || lib->version == version) { 121 if (verbose) { 122 fprintf(stderr, "Looking for GTK%d library...\n", 123 lib->version); 124 } 125 gtk = lib->load(env, lib->vname); 126 if (!gtk) { 127 gtk = lib->load(env, lib->name); 128 } 129 if (verbose && !gtk) { 130 fprintf(stderr, "Not found.\n"); 131 } 132 } 133 } 134 } 135 if (verbose) { 136 if (gtk) { 137 fprintf(stderr, "GTK%d library loaded.\n", lib->version); 138 } else { 139 fprintf(stderr, "Failed to load GTK library.\n"); 140 } 141 } 142 } 143 return gtk != NULL; 144 } 145 146 static gboolean check_version(GtkVersion version) { 147 GtkLib** libs = get_libs_order(version); 148 if (libs == NULL) return FALSE; 149 while (*libs) { 150 GtkLib* lib = *libs++; 151 if (lib->check(lib->vname, /* load = */TRUE)) { 152 return TRUE; 153 } 154 if (lib->check(lib->name, /* load = */TRUE)) { 155 return TRUE; 156 } 157 } 158 return FALSE; 159 } 160 161 gboolean gtk_check_version(GtkVersion version) { 162 if (gtk || get_loaded()) { 163 return TRUE; 164 } 165 return check_version(version); 166 } 167