void
JXMesaCamera::InitMesa
(
JX3DWidget* widget,
J3DUniverse* universe
)
{
assert( widget->GetColormap() == &(universe->GetColormap()) );
itsWidget = widget;
itsDoubleBufferFlag = kJTrue;
itsPerspectiveFlag = kJTrue;
itsFOVAngle = 45.0;
itsNearZ = 0.1;
itsFarZ = 10.0;
XVisualInfo xvi = (itsWidget->GetColormap())->GetXVisualInfo();
itsXMVisual =
XMesaCreateVisual(*(itsWidget->GetDisplay()),
&xvi,
kJTrue, // RGB
GL_FALSE, // alpha buffer
itsDoubleBufferFlag, // double buffering
GL_FALSE, // stereo visual
GL_FALSE, // use Pixmap for back buffer
16, // bits/depth
0, // bits/stencil
0,0,0,0, // bits/component (accum)
0, // number of samples/pixel
0, // visual level
GLX_NONE_EXT); // GLX extension
assert( itsXMVisual != NULL );
itsXMContext = XMesaCreateContext(itsXMVisual, NULL);
assert( itsXMContext != NULL );
itsXMBuffer =
XMesaCreateWindowBuffer(itsXMVisual, (itsWidget->GetWindow())->GetXWindow());
assert( itsXMBuffer != NULL );
const JBoolean ok = PrepareMesa();
assert( ok );
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
if (!itsDoubleBufferFlag)
{
glEnable(GL_SCISSOR_TEST);
}
glEnable(GL_DITHER);
glEnable(GL_LINE_SMOOTH); // anti-aliasing
// glEnable(GL_POLYGON_SMOOTH); // anti-aliasing
UpdateViewport();
}
static void make_window( char *title, int color_flag )
{
int x = 10, y = 10, width = 400, height = 300;
Display *dpy;
int scr;
Window root, win;
Colormap cmap;
XColor xcolor;
int attr_flags;
XVisualInfo *visinfo;
XSetWindowAttributes attr;
XTextProperty tp;
XSizeHints sh;
XEvent e;
XMesaContext context;
XMesaVisual visual;
XMesaBuffer buffer;
/*
* Do the usual X things to make a window.
*/
dpy = XOpenDisplay(NULL);
if (!dpy) {
printf("Couldn't open default display!\n");
exit(1);
}
scr = DefaultScreen(dpy);
root = RootWindow(dpy, scr);
/* alloc visinfo struct */
visinfo = (XVisualInfo *) malloc( sizeof(XVisualInfo) );
/* Get a visual and colormap */
if (color_flag) {
/* Open TrueColor window */
/*
if (!XMatchVisualInfo( dpy, scr, 24, TrueColor, visinfo )) {
printf("Couldn't get 24-bit TrueColor visual!\n");
exit(1);
}
*/
if (!XMatchVisualInfo( dpy, scr, 8, PseudoColor, visinfo )) {
printf("Couldn't get 8-bit PseudoColor visual!\n");
exit(1);
}
cmap = XCreateColormap( dpy, root, visinfo->visual, AllocNone );
Black = Red = Green = Blue = 0;
}
else {
/* Open color index window */
if (!XMatchVisualInfo( dpy, scr, 8, PseudoColor, visinfo )) {
printf("Couldn't get 8-bit PseudoColor visual\n");
exit(1);
}
cmap = XCreateColormap( dpy, root, visinfo->visual, AllocNone );
/* Allocate colors */
xcolor.red = 0x0;
xcolor.green = 0x0;
xcolor.blue = 0x0;
xcolor.flags = DoRed | DoGreen | DoBlue;
if (!XAllocColor( dpy, cmap, &xcolor )) {
printf("Couldn't allocate black!\n");
exit(1);
}
Black = xcolor.pixel;
xcolor.red = 0xffff;
xcolor.green = 0x0;
xcolor.blue = 0x0;
xcolor.flags = DoRed | DoGreen | DoBlue;
if (!XAllocColor( dpy, cmap, &xcolor )) {
printf("Couldn't allocate red!\n");
exit(1);
}
Red = xcolor.pixel;
xcolor.red = 0x0;
xcolor.green = 0xffff;
xcolor.blue = 0x0;
xcolor.flags = DoRed | DoGreen | DoBlue;
if (!XAllocColor( dpy, cmap, &xcolor )) {
printf("Couldn't allocate green!\n");
exit(1);
}
Green = xcolor.pixel;
xcolor.red = 0x0;
xcolor.green = 0x0;
xcolor.blue = 0xffff;
xcolor.flags = DoRed | DoGreen | DoBlue;
if (!XAllocColor( dpy, cmap, &xcolor )) {
printf("Couldn't allocate blue!\n");
exit(1);
}
Blue = xcolor.pixel;
}
/* set window attributes */
attr.colormap = cmap;
attr.event_mask = ExposureMask | StructureNotifyMask;
attr.border_pixel = BlackPixel( dpy, scr );
attr.background_pixel = BlackPixel( dpy, scr );
attr_flags = CWColormap | CWEventMask | CWBorderPixel | CWBackPixel;
/* Create the window */
win = XCreateWindow( dpy, root, x,y, width, height, 0,
visinfo->depth, InputOutput,
visinfo->visual,
attr_flags, &attr);
if (!win) {
printf("Couldn't open window!\n");
exit(1);
}
XStringListToTextProperty(&title, 1, &tp);
sh.flags = USPosition | USSize;
XSetWMProperties(dpy, win, &tp, &tp, 0, 0, &sh, 0, 0);
XMapWindow(dpy, win);
while (1) {
XNextEvent( dpy, &e );
if (e.type == MapNotify && e.xmap.window == win) {
break;
}
}
/*
* Now do the special Mesa/Xlib stuff!
*/
visual = XMesaCreateVisual( dpy, visinfo,
(GLboolean) color_flag,
GL_FALSE, /* alpha_flag */
GL_FALSE, /* db_flag */
GL_FALSE, /* stereo flag */
GL_FALSE, /* ximage_flag */
0, /* depth size */
0, /* stencil size */
0,0,0,0, /* accum_size */
0, /* num samples */
0, /* level */
0 /* caveat */
);
if (!visual) {
printf("Couldn't create Mesa/X visual!\n");
exit(1);
}
/* Create a Mesa rendering context */
context = XMesaCreateContext( visual,
NULL /* share_list */
);
if (!context) {
printf("Couldn't create Mesa/X context!\n");
exit(1);
}
buffer = XMesaCreateWindowBuffer( visual, win );
if (!buffer) {
printf("Couldn't create Mesa/X buffer!\n");
exit(1);
}
XMesaMakeCurrent( context, buffer );
/* Ready to render! */
}
