1 /*
2 * Copyright (c) 2013, 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 <stdlib.h>
27
28 #include "glass_screen.h"
29 #include "glass_general.h"
30 #include "glass_wrapper.h"
31
32 #include <X11/Xatom.h>
33 #include <gdk/gdk.h>
34 #include <gdk/gdkx.h>
35
36 jfloat OverrideUIScale = -1.0f;
37
38 static guint get_current_desktop(GdkScreen *screen) {
39 Display* display = gdk_x11_display_get_xdisplay(gdk_display_get_default());
40 Atom currentDesktopAtom = XInternAtom(display, "_NET_CURRENT_DESKTOP", True);
41 guint ret = 0;
42
43 Atom type;
44 int format;
45 gulong num, left;
46 unsigned long *data = NULL;
47
48 if (currentDesktopAtom == None) {
49 return 0;
50 }
51
52 int result = XGetWindowProperty(display,
53 GDK_WINDOW_XID(gdk_screen_get_root_window(screen)),
54 currentDesktopAtom, 0, G_MAXLONG, False, XA_CARDINAL,
55 &type, &format, &num, &left, (unsigned char **)&data);
56
57 if ((result == Success) && (data != NULL)) {
58 if (type == XA_CARDINAL && format == 32) {
59 ret = data[0];
60 }
61
62 XFree(data);
63 }
64
65 return ret;
66
67 }
68
69 static GdkRectangle get_screen_workarea(GdkScreen *screen) {
70 Display* display = gdk_x11_display_get_xdisplay(gdk_display_get_default());
71 GdkRectangle ret = { 0, 0, gdk_screen_get_width(screen), gdk_screen_get_height(screen)};
72
73 Atom workareaAtom = XInternAtom(display, "_NET_WORKAREA", True);
74
75 Atom type;
76 int format;
77 gulong num, left;
78 unsigned long *data = NULL;
79
80 if (workareaAtom == None) {
81 return ret;
82 }
83
84 int result = XGetWindowProperty(display,
85 GDK_WINDOW_XID(gdk_screen_get_root_window(screen)),
86 workareaAtom, 0, G_MAXLONG, False, AnyPropertyType,
87 &type, &format, &num, &left, (unsigned char **)&data);
88
89 if ((result == Success) && (data != NULL)) {
90 if (type != None && format == 32) {
91 guint current_desktop = get_current_desktop(screen);
92 if (current_desktop < num / 4) {
93 ret.x = data[current_desktop * 4];
94 ret.y = data[current_desktop * 4 + 1];
95 ret.width = data[current_desktop * 4 + 2];
96 ret.height = data[current_desktop * 4 + 3];
97 }
98 }
99
100 XFree(data);
101 }
102
103 return ret;
104
105 }
106
107 jfloat getUIScale() {
108 jfloat uiScale;
109 if (OverrideUIScale > 0.0f) {
110 uiScale = OverrideUIScale;
111 } else {
112 char *scale_str = getenv("GDK_SCALE");
113 int gdk_scale = (scale_str == NULL) ? -1 : atoi(scale_str);
114 if (gdk_scale > 0) {
115 uiScale = (jfloat) gdk_scale;
116 } else {
117 uiScale = (jfloat) glass_settings_get_guint_opt("org.gnome.desktop.interface",
118 "scaling-factor", 0);
119 if (uiScale < 1) {
120 uiScale = 1;
121 }
122 }
123 }
124 return uiScale;
125 }
126
127 static jobject createJavaScreen(JNIEnv* env, GdkScreen* screen, gint monitor_idx)
128 {
129 GdkRectangle workArea = get_screen_workarea(screen);
130 LOG4("Work Area: x:%d, y:%d, w:%d, h:%d\n", workArea.x, workArea.y, workArea.width, workArea.height);
131
132 GdkRectangle monitor_geometry;
133 gdk_screen_get_monitor_geometry(screen, monitor_idx, &monitor_geometry);
134 LOG1("convert monitor[%d] -> glass Screen\n", monitor_idx)
135 LOG4("[x: %d y: %d w: %d h: %d]\n",
136 monitor_geometry.x, monitor_geometry.y,
137 monitor_geometry.width, monitor_geometry.height)
138
139 GdkVisual* visual = gdk_screen_get_system_visual(screen);
140
141 GdkRectangle working_monitor_geometry;
142 gdk_rectangle_intersect(&workArea, &monitor_geometry, &working_monitor_geometry);
143
144 jfloat uiScale = getUIScale();
145
146 jint mx = monitor_geometry.x / uiScale;
147 jint my = monitor_geometry.y / uiScale;
148 jint mw = monitor_geometry.width / uiScale;
149 jint mh = monitor_geometry.height / uiScale;
150 jint wx = working_monitor_geometry.x / uiScale;
151 jint wy = working_monitor_geometry.y / uiScale;
152 jint ww = working_monitor_geometry.width / uiScale;
153 jint wh = working_monitor_geometry.height / uiScale;
154
155 gint mmW = gdk_screen_get_monitor_width_mm(screen, monitor_idx);
156 gint mmH = gdk_screen_get_monitor_height_mm(screen, monitor_idx);
157 if (mmW <= 0 || mmH <= 0) {
158 if (gdk_screen_get_n_monitors(screen) == 1) {
159 mmW = gdk_screen_get_width_mm(screen);
160 mmH = gdk_screen_get_height_mm(screen);
161 }
162 }
163 jint dpiX, dpiY;
164 if (mmW <= 0 || mmH <= 0) {
165 dpiX = dpiY = 96;
166 } else {
167 dpiX = (mw * 254) / (mmW * 10);
168 dpiY = (mh * 254) / (mmH * 10);
169 }
170
171 jobject jScreen = env->NewObject(jScreenCls, jScreenInit,
172 (jlong)monitor_idx,
173
174 (visual ? glass_gdk_visual_get_depth(visual) : 0),
175
176 mx, my, mw, mh,
177
178 monitor_geometry.x,
179 monitor_geometry.y,
180 monitor_geometry.width,
181 monitor_geometry.height,
182
183 wx, wy, ww, wh,
184
185 dpiX, dpiY,
186 uiScale, uiScale, uiScale, uiScale);
187
188 JNI_EXCEPTION_TO_CPP(env);
189 return jScreen;
190 }
191
192 jobject createJavaScreen(JNIEnv* env, gint monitor_idx) {
193 GdkScreen *default_gdk_screen = gdk_screen_get_default();
194 try {
195 return createJavaScreen(env, default_gdk_screen, monitor_idx);
196 } catch (jni_exception&) {
197 return NULL;
198 }
199 }
200
201 jobjectArray rebuild_screens(JNIEnv* env) {
202 GdkScreen *default_gdk_screen = gdk_screen_get_default();
203 gint n_monitors = gdk_screen_get_n_monitors(default_gdk_screen);
204
205 jobjectArray jscreens = env->NewObjectArray(n_monitors, jScreenCls, NULL);
206 JNI_EXCEPTION_TO_CPP(env)
207 LOG1("Available monitors: %d\n", n_monitors)
208
209 int i;
210 for (i=0; i < n_monitors; i++) {
211 env->SetObjectArrayElement(jscreens, i, createJavaScreen(env, default_gdk_screen, i));
212 JNI_EXCEPTION_TO_CPP(env)
213 }
214
215 return jscreens;
216 }
217
218
219 glong getScreenPtrForLocation(gint x, gint y) {
220 //Note: we are relying on the fact that javafx_screen_id == gdk_monitor_id
221 return gdk_screen_get_monitor_at_point(gdk_screen_get_default(), x, y);
222 }
223
224 void screen_settings_changed(GdkScreen* screen, gpointer user_data) {
225 (void)screen;
226 (void)user_data;
227
228 mainEnv->CallStaticVoidMethod(jScreenCls, jScreenNotifySettingsChanged);
229 LOG_EXCEPTION(mainEnv);
230 }