130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/*
|
|
* Copyright © 2009, 2013 Intel Corporation
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <X11/Xlib.h>
|
|
#include "glx_common.h"
|
|
|
|
Display *
|
|
get_display_or_skip(void)
|
|
{
|
|
Display *dpy = XOpenDisplay(NULL);
|
|
|
|
if (!dpy) {
|
|
fputs("couldn't open display\n", stderr);
|
|
exit(77);
|
|
}
|
|
|
|
return dpy;
|
|
}
|
|
|
|
XVisualInfo *
|
|
get_glx_visual(Display *dpy)
|
|
{
|
|
XVisualInfo *visinfo;
|
|
int attrib[] = {
|
|
GLX_RGBA,
|
|
GLX_RED_SIZE, 1,
|
|
GLX_GREEN_SIZE, 1,
|
|
GLX_BLUE_SIZE, 1,
|
|
GLX_DOUBLEBUFFER,
|
|
None
|
|
};
|
|
int screen = DefaultScreen(dpy);
|
|
|
|
visinfo = glXChooseVisual(dpy, screen, attrib);
|
|
if (visinfo == NULL) {
|
|
fputs("Couldn't get an RGBA, double-buffered visual\n", stderr);
|
|
exit(1);
|
|
}
|
|
|
|
return visinfo;
|
|
}
|
|
|
|
Window
|
|
get_glx_window(Display *dpy, XVisualInfo *visinfo, bool map)
|
|
{
|
|
XSetWindowAttributes window_attr;
|
|
unsigned long mask;
|
|
int screen = DefaultScreen(dpy);
|
|
Window root_win = RootWindow(dpy, screen);
|
|
Window win;
|
|
|
|
window_attr.background_pixel = 0;
|
|
window_attr.border_pixel = 0;
|
|
window_attr.colormap = XCreateColormap(dpy, root_win,
|
|
visinfo->visual, AllocNone);
|
|
window_attr.event_mask = StructureNotifyMask | ExposureMask |
|
|
KeyPressMask;
|
|
mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
|
|
win = XCreateWindow(dpy, root_win, 0, 0,
|
|
10, 10, /* width, height */
|
|
0, visinfo->depth, InputOutput,
|
|
visinfo->visual, mask, &window_attr);
|
|
|
|
return win;
|
|
}
|
|
|
|
void
|
|
make_glx_context_current_or_skip(Display *dpy)
|
|
{
|
|
GLXContext ctx;
|
|
XVisualInfo *visinfo = get_glx_visual(dpy);
|
|
Window win = get_glx_window(dpy, visinfo, false);
|
|
|
|
ctx = glXCreateContext(dpy, visinfo, False, True);
|
|
if (ctx == None) {
|
|
fputs("glXCreateContext failed\n", stderr);
|
|
exit(1);
|
|
}
|
|
|
|
glXMakeCurrent(dpy, win, ctx);
|
|
}
|
|
|
|
GLXFBConfig
|
|
get_fbconfig_for_visinfo(Display *dpy, XVisualInfo *visinfo)
|
|
{
|
|
int i, nconfigs;
|
|
GLXFBConfig ret = None, *configs;
|
|
|
|
configs = glXGetFBConfigs(dpy, visinfo->screen, &nconfigs);
|
|
if (!configs)
|
|
return None;
|
|
|
|
for (i = 0; i < nconfigs; i++) {
|
|
int v;
|
|
|
|
if (glXGetFBConfigAttrib(dpy, configs[i], GLX_VISUAL_ID, &v))
|
|
continue;
|
|
|
|
if (v == visinfo->visualid) {
|
|
ret = configs[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
XFree(configs);
|
|
return ret;
|
|
}
|