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#include <err.h>
#include <stdlib.h>
#include "glx.h"
bool
createGLXContextAndWindow(glx_state_t *state, int width, int height)
{
int rgba_attribs[] = {
GLX_RGBA ,
GLX_RED_SIZE , 1,
GLX_GREEN_SIZE , 1,
GLX_BLUE_SIZE , 1,
GLX_ALPHA_SIZE , 1,
//GLX_STENCIL_SIZE , 8,
//GLX_DOUBLEBUFFER , True,
None
};
XVisualInfo *visinfo;
XSetWindowAttributes xattr;
state->dpy = XOpenDisplay (NULL);
if (state->dpy == NULL) {
warnx ("Failed to open display: %s\n", XDisplayName (0));
return false;
}
visinfo = glXChooseVisual (state->dpy, DefaultScreen (state->dpy), rgba_attribs);
if (visinfo == NULL) {
warnx ("Failed to create RGBA and double-buffered visuals\n");
XCloseDisplay (state->dpy);
return NULL;
}
xattr.colormap = XCreateColormap (state->dpy,
RootWindow (state->dpy, visinfo->screen),
visinfo->visual, AllocNone);
xattr.border_pixel = 0;
state->window = XCreateWindow (state->dpy,
DefaultRootWindow (state->dpy),
100, 50,
width, height,
0, // border width
visinfo->depth,
InputOutput, visinfo->visual,
CWBorderPixel | CWColormap, // | CWEventMask ?
&xattr);
XMapWindow (state->dpy, state->window);
//gc = XCreateGC(state->dpy, state->window, 0, NULL);
state->glx_context = glXCreateContext (state->dpy, visinfo, NULL, True);
XFree (visinfo);
if (state->glx_context == NULL) {
warnx ("Could not create glx context\n");
XCloseDisplay (state->dpy);
return false;
}
return true;
}
void
destroyGLXContextAndWindow (glx_state_t *state)
{
if (state->dpy) {
glXDestroyContext (state->dpy, state->glx_context);
XDestroyWindow (state->dpy, state->window);
XCloseDisplay (state->dpy);
}
}
void
cleanup_state_glx (void *data)
{
glx_state_t *state = (glx_state_t*)data;
destroyGLXContextAndWindow(state);
free(state);
}
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