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/*
* 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 "epoxy/glx.h"
Display *
get_display_or_skip(void)
{
Display *dpy = XOpenDisplay(NULL);
if (!dpy) {
fprintf(stderr, "couldn't open display\n");
exit(77);
}
return dpy;
}
static 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) {
fprintf(stderr,
"Couldn't get an RGBA, double-buffered visual\n");
exit(1);
}
return visinfo;
}
static 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) {
fprintf(stderr, "glXCreateContext failed\n");
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;
}
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