1 /*
2 * Copyright (c) 2016, 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 #include <stdio.h>
27 #include <stdlib.h>
28 #include <linux/fb.h>
29 #include <fcntl.h>
30 #ifndef __USE_GNU // required for dladdr() & Dl_info
31 #define __USE_GNU
32 #endif
33 #include <dlfcn.h>
34 #include <sys/ioctl.h>
35
36 #include <string.h>
37 #include <strings.h>
38 #include <stdlib.h>
39
40 #include <X11/Xlib.h>
41
42 #include <assert.h>
43
44 #include <jni.h>
45
46 #include <com_sun_glass_ui_gtk_GtkApplication.h>
47
48 #define LOAD_SYMBOL(s, x) \
49 if (s == NULL) { \
50 s = dlsym(libraryHandle, #x); \
51 if (s == NULL) { \
52 fprintf(stderr,"failed loading %s\n", #x); \
53 exit(-1); \
54 } else { \
55 fprintf(stderr,"loading %s\n", #x); \
56 } \
57 } else { \
58 fprintf(stderr,"have %s\n", #x); \
59 }
60
61 static const char * gtk2_chain[] = {
62 "libglassgtk2.so", "libglassgtk3.so", 0
63 };
64
65 static const char * gtk3_chain[] = {
66 "libglassgtk3.so", "libglassgtk2.so", 0
67 };
68
69 static JavaVM* javaVM;
70
71 JNIEXPORT jint JNICALL
72 JNI_OnLoad(JavaVM *jvm, void *reserved)
73 {
74 (void) reserved;
75
76 javaVM = jvm;
77 // better way to get/save this?
78 return JNI_VERSION_1_6;
79 }
80
81 // our library combinations defined
82 // "version" "libgtk", "libdgdk", "libpixbuf"
83 // note that currently only the first char of the version is used
84 static char * gtk2_versioned[] = {
85 "2", "libgtk-x11-2.0.so.0", "libgdk-x11-2.0.so.0", "libgdk_pixbuf-2.0.so"
86 };
87
88 static char * gtk2_not_versioned[] = {
89 "2", "libgtk-x11-2.0.so", "libgdk-x11-2.0.so", "libgdk_pixbuf-2.0.so"
90 };
91
92 static char * gtk3_versioned[] = {
93 "3", "libgtk-3.so.0", "libgdk-3.so.0", "libgdk_pixbuf-2.0.so.0"
94 };
95
96 static char * gtk3_not_versioned[] = {
97 "3", "libgtk-3.so", "libgdk-3.so", "libgdk_pixbuf-2.0.so"
98 };
99
100 // our library set orders defined, null terminated
101 static char ** two_to_three[] = {
102 gtk2_versioned, gtk2_not_versioned,
103 gtk3_versioned, gtk3_not_versioned,
104 0
105 };
106
107 static char ** three_to_two[] = {
108 gtk3_versioned, gtk3_not_versioned,
109 gtk2_versioned, gtk2_not_versioned,
110 0
111 };
112
113 static int try_opening_libraries(char *names[3])
114 {
115 void * gtk;
116 void * gdk;
117 void * pix;
118
119 gtk = dlopen (names[1], RTLD_LAZY | RTLD_GLOBAL);
120 if (!gtk) {
121 return 0;
122 }
123
124 gdk = dlopen (names[2], RTLD_LAZY | RTLD_GLOBAL);
125 if (!gdk) {
126 dlclose(gtk);
127 return 0;
128 }
129
130 pix = dlopen (names[3], RTLD_LAZY | RTLD_GLOBAL);
131 if (!pix) {
132 dlclose(gtk);
133 dlclose(gdk);
134 gtk = gdk = 0;
135 return 0;
136 }
137
138 dlclose(gtk);
139 dlclose(gdk);
140 dlclose(pix);
141
142 return 1;
143 }
144
145 static int sniffLibs(int wantVersion) {
146
147 printf("trying for version %d\n",wantVersion);
148
149 int success = 1;
150 char *** use_chain;
151 int wrapper_gtk_version;
152 int wrapper_gtk_versionDebug = 1;
153
154 if (wantVersion == 0 || wantVersion == 2) {
155 use_chain = two_to_three;
156 wrapper_gtk_version = 2;
157 } else if (wantVersion == 3) {
158 use_chain = three_to_two;
159 wrapper_gtk_version = 3;
160 } else {
161 printf(" Huh ? what version is %d\n", wantVersion);
162 exit (-3);
163 }
164
165 int i, found = 0;
166 for(i = 0; use_chain[i] && !found; i++) {
167 if (wrapper_gtk_versionDebug) {
168 printf("trying GTK library set %s, %s, %s\n", use_chain[i][1], use_chain[i][2], use_chain[i][3]);
169 }
170 found = try_opening_libraries(use_chain[i]);
171
172 if (found) {
173 if (use_chain[i][0][0] == '2') {
174 wrapper_gtk_version = 2;
175 } else {
176 wrapper_gtk_version = 3;
177 }
178 }
179 }
180
181 if (found) {
182 if (wrapper_gtk_versionDebug) {
183 i--;
184 printf("using GTK library version %s set %s, %s, %s\n",
185 use_chain[i][0],
186 use_chain[i][1],
187 use_chain[i][2],
188 use_chain[i][3]);
189 }
190 return use_chain[i][0][0];
191 }
192
193 return -1;
194 }
195 /*
196 * Class: com_sun_glass_ui_gtk_GtkApplication
197 * Method: _queryLibrary
198 * Signature: Signature: (IZ)I
199 */
200 JNIEXPORT jint JNICALL Java_com_sun_glass_ui_gtk_GtkApplication__1queryLibrary
201 (JNIEnv *env, jclass clazz, jint suggestedVersion, jboolean verbose)
202 {
203 (void) env;
204 (void) clazz;
205 (void) verbose;
206
207 // Before doing anything with GTK we validate that the DISPLAY can be opened
208 Display *display = XOpenDisplay(NULL);
209 if (display == NULL) {
210 return com_sun_glass_ui_gtk_GtkApplication_QUERY_NO_DISPLAY;
211 }
212 XCloseDisplay(display);
213
214 // now check the the presence of the libraries
215
216 char version = sniffLibs(suggestedVersion);
217
218 if (version == '2') {
219 return com_sun_glass_ui_gtk_GtkApplication_QUERY_LOAD_GTK2;
220 } else if (version == '3') {
221 return com_sun_glass_ui_gtk_GtkApplication_QUERY_LOAD_GTK3;
222 }
223
224 return com_sun_glass_ui_gtk_GtkApplication_QUERY_ERROR;
225 }
226