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/*************************************************************************
* Copyright (C) 2009-2014 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Test Suite. *
* *
* The Dimension Test Suite is free software; you can redistribute it *
* and/or modify it under the terms of the GNU General Public License as *
* published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Test Suite is distributed in the hope that it will be *
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
*************************************************************************/
#include "tests.h"
#include <GL/glx.h>
#include <GL/gl.h>
#include <stdlib.h>
struct dmnsn_display {
Display *dpy;
Window win;
Colormap cmap;
GLXContext cx;
XEvent event;
XVisualInfo *vi;
};
// XIfEvent callback
static Bool
WaitForNotify(Display *d, XEvent *e, char *arg)
{
return (e->type == MapNotify) && (e->xmap.window == (Window)arg);
}
dmnsn_display *
dmnsn_new_display(const dmnsn_canvas *canvas)
{
int attributeList[] = {
GLX_RGBA,
GLX_DOUBLEBUFFER,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
None
};
XSetWindowAttributes swa;
dmnsn_display *display;
display = DMNSN_MALLOC(dmnsn_display);
display->dpy = NULL;
display->win = 0;
display->cmap = 0;
display->cx = NULL;
display->vi = NULL;
// Get an X connection
display->dpy = XOpenDisplay(0);
if (!display->dpy) {
dmnsn_delete_display(display);
return NULL;
}
// Get an appropriate visual
display->vi = glXChooseVisual(display->dpy, DefaultScreen(display->dpy),
attributeList);
if (!display->vi) {
dmnsn_delete_display(display);
return NULL;
}
// Create a GLX context
display->cx = glXCreateContext(display->dpy, display->vi, 0, GL_TRUE);
if (!display->cx) {
dmnsn_delete_display(display);
return NULL;
}
// Create a color map
display->cmap = XCreateColormap(display->dpy,
RootWindow(display->dpy, display->vi->screen),
display->vi->visual, AllocNone);
if (!display->cmap) {
dmnsn_delete_display(display);
return NULL;
}
// Create a window
swa.colormap = display->cmap;
swa.border_pixel = 0;
swa.event_mask = StructureNotifyMask;
display->win = XCreateWindow(display->dpy,
RootWindow(display->dpy, display->vi->screen),
0, 0, canvas->width, canvas->height,
0, display->vi->depth, InputOutput,
display->vi->visual,
CWBorderPixel|CWColormap|CWEventMask, &swa);
if (!display->win) {
dmnsn_delete_display(display);
return NULL;
}
XStoreName(display->dpy, display->win, "glX");
XMapWindow(display->dpy, display->win);
XIfEvent(display->dpy, &display->event, WaitForNotify, (char*)display->win);
// Connect the context to the window
glXMakeCurrent(display->dpy, display->win, display->cx);
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
dmnsn_display_flush(display);
return display;
}
void
dmnsn_delete_display(dmnsn_display *display)
{
if (display) {
if (display->win)
XDestroyWindow(display->dpy, display->win);
if (display->cmap)
XFreeColormap(display->dpy, display->cmap);
if (display->cx)
glXDestroyContext(display->dpy, display->cx);
if (display->vi)
XFree(display->vi);
if (display->dpy)
XCloseDisplay(display->dpy);
dmnsn_free(display);
}
}
void
dmnsn_display_flush(dmnsn_display *display)
{
glXWaitX();
glXSwapBuffers(display->dpy, display->win);
}
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