1/*
2 * fg_state_x11.c
3 *
4 * X11-specific freeglut state query methods.
5 *
6 * Copyright (c) 2012 Stephen J. Baker. All Rights Reserved.
7 * Written by John F. Fay, <fayjf@sourceforge.net>
8 * Creation date: Sat Feb 4 2012
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a
11 * copy of this software and associated documentation files (the "Software"),
12 * to deal in the Software without restriction, including without limitation
13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
14 * and/or sell copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included
18 * in all copies or substantial portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
24 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
25 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 */
27
28#include <GL/freeglut.h>
29#include "fg_internal.h"
30#ifdef EGL_VERSION_1_0
31#include "egl/fg_state_egl.h"
32#else
33#include "x11/fg_state_x11_glx.h"
34#endif
35
36int fgPlatformGlutDeviceGet ( GLenum eWhat )
37{
38 switch( eWhat )
39 {
40 case GLUT_HAS_KEYBOARD:
41 /*
42 * X11 has a core keyboard by definition, although it can
43 * be present as a virtual/dummy keyboard. For now, there
44 * is no reliable way to tell if a real keyboard is present.
45 */
46 return 1;
47
48 /* X11 has a mouse by definition */
49 case GLUT_HAS_MOUSE:
50 return 1 ;
51
52 case GLUT_NUM_MOUSE_BUTTONS:
53 /* We should be able to pass NULL when the last argument is zero,
54 * but at least one X server has a bug where this causes a segfault.
55 *
56 * In XFree86/Xorg servers, a mouse wheel is seen as two buttons
57 * rather than an Axis; "fg_main.c" expects this when
58 * checking for a wheel event.
59 */
60 {
61 unsigned char map;
62 int nbuttons = XGetPointerMapping(fgDisplay.pDisplay.Display, &map,0);
63 return nbuttons;
64 }
65
66 default:
67 fgWarning( "glutDeviceGet(): missing enum handle %d", eWhat );
68 break;
69 }
70
71 /* And now -- the failure. */
72 return -1;
73}
74
75
76int fgPlatformGlutGet ( GLenum eWhat )
77{
78 switch( eWhat )
79 {
80
81 /*
82 * Those calls are somewhat similar, as they use XGetWindowAttributes()
83 * function
84 */
85 case GLUT_WINDOW_X:
86 case GLUT_WINDOW_Y:
87 {
88 int x, y;
89 Window p,w;
90
91 if( fgStructure.CurrentWindow == NULL )
92 return 0;
93
94 if (fgStructure.CurrentWindow->Parent)
95 /* For child window, we should return relative to upper-left
96 * of parent's client area.
97 */
98 p = fgStructure.CurrentWindow->Parent->Window.Handle;
99 else
100 p = fgDisplay.pDisplay.RootWindow;
101
102 XTranslateCoordinates(
103 fgDisplay.pDisplay.Display,
104 fgStructure.CurrentWindow->Window.Handle,
105 p,
106 0, 0, &x, &y, &w);
107
108 switch ( eWhat )
109 {
110 case GLUT_WINDOW_X: return x;
111 case GLUT_WINDOW_Y: return y;
112 }
113 }
114
115 case GLUT_WINDOW_BORDER_WIDTH:
116 case GLUT_WINDOW_HEADER_HEIGHT:
117 {
118 Atom actual_type, net_extents;
119 int actual_format;
120 unsigned long nitems, bytes_after;
121 unsigned char *data = NULL;
122 int result, top, left;
123
124 if (fgStructure.CurrentWindow == NULL || fgStructure.CurrentWindow->Parent)
125 /* can't get widths/heights if no current window
126 * and child windows don't have borders */
127 return 0;
128
129 /* try to get through _NET_FRAME_EXTENTS */
130 net_extents = XInternAtom(fgDisplay.pDisplay.Display, "_NET_FRAME_EXTENTS", False);
131
132 result = XGetWindowProperty(
133 fgDisplay.pDisplay.Display, fgStructure.CurrentWindow->Window.Handle, net_extents,
134 0, 4, False, AnyPropertyType,
135 &actual_type, &actual_format,
136 &nitems, &bytes_after, &data);
137
138 if (result == Success && nitems == 4 && bytes_after == 0)
139 /* got the data we expected, here's to hoping that
140 * _NET_FRAME_EXTENTS is supported and the data
141 * contain sensible values */
142 {
143 long *extents = (long *)data;
144 left = (int) extents[0]; /* we take left as border width, consistent with old logic. bottom and right better be the same... */
145 top = (int) extents[2];
146 }
147 else
148 {
149 /* try in the previous way as fall-back */
150 Window w;
151 int x,y;
152
153 XTranslateCoordinates(
154 fgDisplay.pDisplay.Display,
155 fgStructure.CurrentWindow->Window.Handle,
156 fgDisplay.pDisplay.RootWindow,
157 0, 0, &x, &y, &w);
158
159 if (w == 0)
160 /* logic below needs w */
161 return 0;
162
163 XTranslateCoordinates(
164 fgDisplay.pDisplay.Display,
165 fgStructure.CurrentWindow->Window.Handle,
166 w, 0, 0, &x, &y, &w);
167
168 left = x;
169 top = y;
170 }
171 if (result == Success)
172 XFree(data);
173
174 switch ( eWhat )
175 {
176 case GLUT_WINDOW_BORDER_WIDTH: return left;
177 case GLUT_WINDOW_HEADER_HEIGHT: return top;
178 }
179 }
180
181 case GLUT_WINDOW_WIDTH:
182 case GLUT_WINDOW_HEIGHT:
183 {
184 XWindowAttributes winAttributes;
185
186 if( fgStructure.CurrentWindow == NULL )
187 return 0;
188 XGetWindowAttributes(
189 fgDisplay.pDisplay.Display,
190 fgStructure.CurrentWindow->Window.Handle,
191 &winAttributes
192 );
193 switch ( eWhat )
194 {
195 case GLUT_WINDOW_WIDTH: return winAttributes.width ;
196 case GLUT_WINDOW_HEIGHT: return winAttributes.height ;
197 }
198 }
199
200 /* Colormap size is handled in a bit different way than all the rest */
201 case GLUT_WINDOW_COLORMAP_SIZE:
202 if(
203#ifndef EGL_VERSION_1_0
204 fgPlatformGetConfig( GLX_RGBA ) ||
205#endif
206 fgStructure.CurrentWindow == NULL)
207 {
208 /*
209 * We've got a RGBA visual, so there is no colormap at all.
210 * The other possibility is that we have no current window set.
211 */
212 return 0;
213 }
214 else
215 {
216 XVisualInfo * visualInfo;
217 int result;
218#ifdef EGL_VERSION_1_0
219 EGLint vid = 0;
220 XVisualInfo visualTemplate;
221 int num_visuals;
222 if (!eglGetConfigAttrib(fgDisplay.pDisplay.egl.Display,
223 fgStructure.CurrentWindow->Window.pContext.egl.Config,
224 EGL_NATIVE_VISUAL_ID, &vid))
225 fgError("eglGetConfigAttrib(EGL_NATIVE_VISUAL_ID) failed");
226 visualTemplate.visualid = vid;
227 visualInfo = XGetVisualInfo(fgDisplay.pDisplay.Display, VisualIDMask, &visualTemplate, &num_visuals);
228#else
229 {
230 const GLXFBConfig fbconfig =
231 fgStructure.CurrentWindow->Window.pContext.FBConfig;
232
233 visualInfo =
234 glXGetVisualFromFBConfig( fgDisplay.pDisplay.Display, fbconfig );
235 }
236#endif
237 result = visualInfo->visual->map_entries;
238
239 XFree(visualInfo);
240
241 return result;
242 }
243
244 default:
245#ifdef EGL_VERSION_1_0
246 return fghPlatformGlutGetEGL(eWhat);
247#else
248 return fghPlatformGlutGetGLX(eWhat);
249#endif
250 }
251}
252