1*706d0b42SXin Li /*
2*706d0b42SXin Li * Copyright © 2009, 2013 Intel Corporation
3*706d0b42SXin Li *
4*706d0b42SXin Li * Permission is hereby granted, free of charge, to any person obtaining a
5*706d0b42SXin Li * copy of this software and associated documentation files (the "Software"),
6*706d0b42SXin Li * to deal in the Software without restriction, including without limitation
7*706d0b42SXin Li * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8*706d0b42SXin Li * and/or sell copies of the Software, and to permit persons to whom the
9*706d0b42SXin Li * Software is furnished to do so, subject to the following conditions:
10*706d0b42SXin Li *
11*706d0b42SXin Li * The above copyright notice and this permission notice (including the next
12*706d0b42SXin Li * paragraph) shall be included in all copies or substantial portions of the
13*706d0b42SXin Li * Software.
14*706d0b42SXin Li *
15*706d0b42SXin Li * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16*706d0b42SXin Li * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17*706d0b42SXin Li * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18*706d0b42SXin Li * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19*706d0b42SXin Li * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20*706d0b42SXin Li * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21*706d0b42SXin Li * IN THE SOFTWARE.
22*706d0b42SXin Li */
23*706d0b42SXin Li
24*706d0b42SXin Li #include <stdio.h>
25*706d0b42SXin Li #include <stdlib.h>
26*706d0b42SXin Li #include <X11/Xlib.h>
27*706d0b42SXin Li #include "glx_common.h"
28*706d0b42SXin Li
29*706d0b42SXin Li Display *
get_display_or_skip(void)30*706d0b42SXin Li get_display_or_skip(void)
31*706d0b42SXin Li {
32*706d0b42SXin Li Display *dpy = XOpenDisplay(NULL);
33*706d0b42SXin Li
34*706d0b42SXin Li if (!dpy) {
35*706d0b42SXin Li fputs("couldn't open display\n", stderr);
36*706d0b42SXin Li exit(77);
37*706d0b42SXin Li }
38*706d0b42SXin Li
39*706d0b42SXin Li return dpy;
40*706d0b42SXin Li }
41*706d0b42SXin Li
42*706d0b42SXin Li XVisualInfo *
get_glx_visual(Display * dpy)43*706d0b42SXin Li get_glx_visual(Display *dpy)
44*706d0b42SXin Li {
45*706d0b42SXin Li XVisualInfo *visinfo;
46*706d0b42SXin Li int attrib[] = {
47*706d0b42SXin Li GLX_RGBA,
48*706d0b42SXin Li GLX_RED_SIZE, 1,
49*706d0b42SXin Li GLX_GREEN_SIZE, 1,
50*706d0b42SXin Li GLX_BLUE_SIZE, 1,
51*706d0b42SXin Li GLX_DOUBLEBUFFER,
52*706d0b42SXin Li None
53*706d0b42SXin Li };
54*706d0b42SXin Li int screen = DefaultScreen(dpy);
55*706d0b42SXin Li
56*706d0b42SXin Li visinfo = glXChooseVisual(dpy, screen, attrib);
57*706d0b42SXin Li if (visinfo == NULL) {
58*706d0b42SXin Li fputs("Couldn't get an RGBA, double-buffered visual\n", stderr);
59*706d0b42SXin Li exit(1);
60*706d0b42SXin Li }
61*706d0b42SXin Li
62*706d0b42SXin Li return visinfo;
63*706d0b42SXin Li }
64*706d0b42SXin Li
65*706d0b42SXin Li Window
get_glx_window(Display * dpy,XVisualInfo * visinfo,bool map)66*706d0b42SXin Li get_glx_window(Display *dpy, XVisualInfo *visinfo, bool map)
67*706d0b42SXin Li {
68*706d0b42SXin Li XSetWindowAttributes window_attr;
69*706d0b42SXin Li unsigned long mask;
70*706d0b42SXin Li int screen = DefaultScreen(dpy);
71*706d0b42SXin Li Window root_win = RootWindow(dpy, screen);
72*706d0b42SXin Li Window win;
73*706d0b42SXin Li
74*706d0b42SXin Li window_attr.background_pixel = 0;
75*706d0b42SXin Li window_attr.border_pixel = 0;
76*706d0b42SXin Li window_attr.colormap = XCreateColormap(dpy, root_win,
77*706d0b42SXin Li visinfo->visual, AllocNone);
78*706d0b42SXin Li window_attr.event_mask = StructureNotifyMask | ExposureMask |
79*706d0b42SXin Li KeyPressMask;
80*706d0b42SXin Li mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
81*706d0b42SXin Li win = XCreateWindow(dpy, root_win, 0, 0,
82*706d0b42SXin Li 10, 10, /* width, height */
83*706d0b42SXin Li 0, visinfo->depth, InputOutput,
84*706d0b42SXin Li visinfo->visual, mask, &window_attr);
85*706d0b42SXin Li
86*706d0b42SXin Li return win;
87*706d0b42SXin Li }
88*706d0b42SXin Li
89*706d0b42SXin Li void
make_glx_context_current_or_skip(Display * dpy)90*706d0b42SXin Li make_glx_context_current_or_skip(Display *dpy)
91*706d0b42SXin Li {
92*706d0b42SXin Li GLXContext ctx;
93*706d0b42SXin Li XVisualInfo *visinfo = get_glx_visual(dpy);
94*706d0b42SXin Li Window win = get_glx_window(dpy, visinfo, false);
95*706d0b42SXin Li
96*706d0b42SXin Li ctx = glXCreateContext(dpy, visinfo, False, True);
97*706d0b42SXin Li if (ctx == None) {
98*706d0b42SXin Li fputs("glXCreateContext failed\n", stderr);
99*706d0b42SXin Li exit(1);
100*706d0b42SXin Li }
101*706d0b42SXin Li
102*706d0b42SXin Li glXMakeCurrent(dpy, win, ctx);
103*706d0b42SXin Li }
104*706d0b42SXin Li
105*706d0b42SXin Li GLXFBConfig
get_fbconfig_for_visinfo(Display * dpy,XVisualInfo * visinfo)106*706d0b42SXin Li get_fbconfig_for_visinfo(Display *dpy, XVisualInfo *visinfo)
107*706d0b42SXin Li {
108*706d0b42SXin Li int i, nconfigs;
109*706d0b42SXin Li GLXFBConfig ret = None, *configs;
110*706d0b42SXin Li
111*706d0b42SXin Li configs = glXGetFBConfigs(dpy, visinfo->screen, &nconfigs);
112*706d0b42SXin Li if (!configs)
113*706d0b42SXin Li return None;
114*706d0b42SXin Li
115*706d0b42SXin Li for (i = 0; i < nconfigs; i++) {
116*706d0b42SXin Li int v;
117*706d0b42SXin Li
118*706d0b42SXin Li if (glXGetFBConfigAttrib(dpy, configs[i], GLX_VISUAL_ID, &v))
119*706d0b42SXin Li continue;
120*706d0b42SXin Li
121*706d0b42SXin Li if (v == visinfo->visualid) {
122*706d0b42SXin Li ret = configs[i];
123*706d0b42SXin Li break;
124*706d0b42SXin Li }
125*706d0b42SXin Li }
126*706d0b42SXin Li
127*706d0b42SXin Li XFree(configs);
128*706d0b42SXin Li return ret;
129*706d0b42SXin Li }
130