source: trunk/src/opengl/glut/glut_get.c

Last change on this file was 2996, checked in by jeroen, 25 years ago

* empty log message *
File size: 6.2 KB
Line 
1/* $Id: glut_get.c,v 1.3 2000-03-04 19:10:14 jeroen Exp $ */
2/* Copyright (c) Mark J. Kilgard, 1994, 1997, 1998. */
3
4/* This program is freely distributable without licensing fees
5 and is provided without guarantee or warrantee expressed or
6 implied. This program is -not- in the public domain. */
7
8#include <assert.h>
9#include <stdlib.h> /* SunOS 4 needs NULL defined for GETTIMEOFDAY macro. */
10#include "glutint.h"
11
12/* CENTRY */
13int GLAPIENTRY
14glutGet(GLenum param)
15{
16 Window win, root;
17 int x, y, value;
18 unsigned int width, height, border, depth;
19
20 switch (param) {
21 case GLUT_INIT_WINDOW_X:
22 return __glutInitX;
23 case GLUT_INIT_WINDOW_Y:
24 return __glutInitY;
25 case GLUT_INIT_WINDOW_WIDTH:
26 return __glutInitWidth;
27 case GLUT_INIT_WINDOW_HEIGHT:
28 return __glutInitHeight;
29 case GLUT_INIT_DISPLAY_MODE:
30 return __glutDisplayMode;
31 case GLUT_WINDOW_X:
32 XTranslateCoordinates(__glutDisplay, __glutCurrentWindow->win,
33 __glutRoot, 0, 0, &x, &y, &win);
34 return x;
35 case GLUT_WINDOW_Y:
36 XTranslateCoordinates(__glutDisplay, __glutCurrentWindow->win,
37 __glutRoot, 0, 0, &x, &y, &win);
38 return y;
39 case GLUT_WINDOW_WIDTH:
40 if (!__glutCurrentWindow->reshape) {
41 XGetGeometry(__glutDisplay, __glutCurrentWindow->win,
42 &root, &x, &y,
43 &width, &height, &border, &depth);
44 return width;
45 }
46 return __glutCurrentWindow->width;
47 case GLUT_WINDOW_HEIGHT:
48 if (!__glutCurrentWindow->reshape) {
49 XGetGeometry(__glutDisplay, __glutCurrentWindow->win,
50 &root, &x, &y,
51 &width, &height, &border, &depth);
52 return height;
53 }
54 return __glutCurrentWindow->height;
55
56#define GET_CONFIG(attrib) { \
57 if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) { \
58 glXGetConfig(__glutDisplay, __glutCurrentWindow->vis, \
59 attrib, &value); \
60 } else { \
61 glXGetConfig(__glutDisplay, __glutCurrentWindow->overlay->vis, \
62 attrib, &value); \
63 } \
64}
65
66 case GLUT_WINDOW_BUFFER_SIZE:
67 GET_CONFIG(GLX_BUFFER_SIZE);
68 return value;
69 case GLUT_WINDOW_STENCIL_SIZE:
70 GET_CONFIG(GLX_STENCIL_SIZE);
71 return value;
72 case GLUT_WINDOW_DEPTH_SIZE:
73 GET_CONFIG(GLX_DEPTH_SIZE);
74 return value;
75 case GLUT_WINDOW_RED_SIZE:
76 GET_CONFIG(GLX_RED_SIZE);
77 return value;
78 case GLUT_WINDOW_GREEN_SIZE:
79 GET_CONFIG(GLX_GREEN_SIZE);
80 return value;
81 case GLUT_WINDOW_BLUE_SIZE:
82 GET_CONFIG(GLX_BLUE_SIZE);
83 return value;
84 case GLUT_WINDOW_ALPHA_SIZE:
85 GET_CONFIG(GLX_ALPHA_SIZE);
86 return value;
87 case GLUT_WINDOW_ACCUM_RED_SIZE:
88 GET_CONFIG(GLX_ACCUM_RED_SIZE);
89 return value;
90 case GLUT_WINDOW_ACCUM_GREEN_SIZE:
91 GET_CONFIG(GLX_ACCUM_GREEN_SIZE);
92 return value;
93 case GLUT_WINDOW_ACCUM_BLUE_SIZE:
94 GET_CONFIG(GLX_ACCUM_BLUE_SIZE);
95 return value;
96 case GLUT_WINDOW_ACCUM_ALPHA_SIZE:
97 GET_CONFIG(GLX_ACCUM_ALPHA_SIZE);
98 return value;
99 case GLUT_WINDOW_DOUBLEBUFFER:
100 GET_CONFIG(GLX_DOUBLEBUFFER);
101 return value;
102 case GLUT_WINDOW_RGBA:
103 GET_CONFIG(GLX_RGBA);
104 return value;
105 case GLUT_WINDOW_COLORMAP_SIZE:
106 GET_CONFIG(GLX_RGBA);
107 if (value) {
108 return 0;
109 } else {
110#if defined(_WIN32) || defined(__WIN32OS2__)
111 /* KLUDGE: we always assume 256 colors in CI mode on
112 Win32 */
113 return 256;
114#else
115 if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) {
116 return __glutCurrentWindow->vis->visual->map_entries;
117 } else {
118 return __glutCurrentWindow->overlay->vis->visual->map_entries;
119 }
120#endif /* _WIN32 */
121 }
122 case GLUT_WINDOW_PARENT:
123 return __glutCurrentWindow->parent ?
124 __glutCurrentWindow->parent->num + 1 : 0;
125 case GLUT_WINDOW_NUM_CHILDREN:
126 {
127 int num = 0;
128 GLUTwindow *children = __glutCurrentWindow->children;
129
130 while (children) {
131 num++;
132 children = children->siblings;
133 }
134 return num;
135 }
136 case GLUT_WINDOW_NUM_SAMPLES:
137#if defined(GLX_VERSION_1_1) && defined(GLX_SGIS_multisample)
138 if (__glutIsSupportedByGLX("GLX_SGIS_multisample")) {
139 GET_CONFIG(GLX_SAMPLES_SGIS);
140 return value;
141 } else {
142 return 0;
143 }
144#else
145 /* Independent of GLX server support, multisampling not
146 supported by GLX client-side. */
147 return 0;
148#endif
149 case GLUT_WINDOW_STEREO:
150 GET_CONFIG(GLX_STEREO);
151 return value;
152 case GLUT_WINDOW_CURSOR:
153 return __glutCurrentWindow->cursor;
154 case GLUT_SCREEN_WIDTH:
155 return DisplayWidth(__glutDisplay, __glutScreen);
156 case GLUT_SCREEN_HEIGHT:
157 return DisplayHeight(__glutDisplay, __glutScreen);
158 case GLUT_SCREEN_WIDTH_MM:
159 return DisplayWidthMM(__glutDisplay, __glutScreen);
160 case GLUT_SCREEN_HEIGHT_MM:
161 return DisplayHeightMM(__glutDisplay, __glutScreen);
162 case GLUT_MENU_NUM_ITEMS:
163 return __glutCurrentMenu->num;
164 case GLUT_DISPLAY_MODE_POSSIBLE:
165 {
166 XVisualInfo *vi;
167 Bool dummy, visAlloced;
168 void *fbc;
169
170#if defined(_WIN32) || defined(__WIN32OS2__)
171 /* Our fake glXChooseVisual (which is called by
172 __glutDetermineVisual) needs an HDC to work with, so grab one
173 from the "root" window. */
174 XHDC = GetDC(GetDesktopWindow());
175#endif
176 vi = __glutDetermineWindowVisual(&dummy, &visAlloced, &fbc);
177#if defined(_WIN32) || defined(__WIN32OS2__)
178 ReleaseDC(GetDesktopWindow(), XHDC);
179#endif
180 if (vi) {
181 if (visAlloced)
182 XFree(vi);
183 return 1;
184 }
185 return 0;
186 }
187 case GLUT_ELAPSED_TIME:
188 {
189 struct timeval elapsed, beginning, now;
190
191 __glutInitTime(&beginning);
192 GETTIMEOFDAY(&now);
193 TIMEDELTA(elapsed, now, beginning);
194 /* Return elapsed milliseconds. */
195#if defined(__vms) && ( __VMS_VER < 70000000 )
196 return (int) (elapsed.val / TICKS_PER_MILLISECOND);
197#else
198 return (int) ((elapsed.tv_sec * 1000) + (elapsed.tv_usec / 1000));
199#endif
200 }
201 case GLUT_WINDOW_FORMAT_ID:
202#if defined(_WIN32) || defined(__WIN32OS2__)
203 return GetPixelFormat(__glutCurrentWindow->hdc);
204#else
205 if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) {
206 return (int) __glutCurrentWindow->vis->visualid;
207 } else {
208 return (int) __glutCurrentWindow->overlay->vis->visualid;
209 }
210#endif
211 default:
212 __glutWarning("invalid glutGet parameter: %d", param);
213 return -1;
214 }
215}
216/* ENDCENTRY */
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