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