287 lines
7.1 KiB
C
287 lines
7.1 KiB
C
|
|
/*
|
|
* Exercise multiple GLX connections on multiple X displays.
|
|
* Direct GLX contexts are attempted first, then indirect.
|
|
* Each window will display a spinning green triangle.
|
|
*
|
|
* Copyright (C) 2000 Brian Paul All Rights Reserved.
|
|
*
|
|
* 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 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
|
|
* BRIAN PAUL 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 <GL/gl.h>
|
|
#include <GL/glx.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
|
|
|
|
/*
|
|
* Each display/window/context:
|
|
*/
|
|
struct head {
|
|
char DisplayName[1000];
|
|
Display *Dpy;
|
|
Window Win;
|
|
GLXContext Context;
|
|
float Angle;
|
|
char Renderer[1000];
|
|
char Vendor[1000];
|
|
char Version[1000];
|
|
};
|
|
|
|
|
|
#define MAX_HEADS 20
|
|
static struct head Heads[MAX_HEADS];
|
|
static int NumHeads = 0;
|
|
|
|
|
|
static void
|
|
Error(const char *display, const char *msg)
|
|
{
|
|
fprintf(stderr, "Error on display %s - %s\n", XDisplayName(display), msg);
|
|
exit(1);
|
|
}
|
|
|
|
|
|
static struct head *
|
|
AddHead(const char *displayName)
|
|
{
|
|
Display *dpy;
|
|
Window win;
|
|
GLXContext ctx;
|
|
int attrib[] = { GLX_RGBA,
|
|
GLX_RED_SIZE, 1,
|
|
GLX_GREEN_SIZE, 1,
|
|
GLX_BLUE_SIZE, 1,
|
|
GLX_DOUBLEBUFFER,
|
|
None };
|
|
int scrnum;
|
|
XSetWindowAttributes attr;
|
|
unsigned long mask;
|
|
Window root;
|
|
XVisualInfo *visinfo;
|
|
int width = 300, height = 300;
|
|
int xpos = 10, ypos = 10;
|
|
|
|
if (NumHeads >= MAX_HEADS)
|
|
return NULL;
|
|
|
|
dpy = XOpenDisplay(displayName);
|
|
if (!dpy) {
|
|
Error(displayName, "Unable to open display");
|
|
return NULL;
|
|
}
|
|
|
|
scrnum = DefaultScreen(dpy);
|
|
root = RootWindow(dpy, scrnum);
|
|
|
|
visinfo = glXChooseVisual(dpy, scrnum, attrib);
|
|
if (!visinfo) {
|
|
Error(displayName, "Unable to find RGB, double-buffered visual");
|
|
return NULL;
|
|
}
|
|
|
|
/* window attributes */
|
|
attr.background_pixel = 0;
|
|
attr.border_pixel = 0;
|
|
attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
|
|
attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
|
|
mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
|
|
|
|
win = XCreateWindow(dpy, root, 0, 0, width, height,
|
|
0, visinfo->depth, InputOutput,
|
|
visinfo->visual, mask, &attr);
|
|
if (!win) {
|
|
Error(displayName, "Couldn't create window");
|
|
return NULL;
|
|
}
|
|
|
|
{
|
|
XSizeHints sizehints;
|
|
sizehints.x = xpos;
|
|
sizehints.y = ypos;
|
|
sizehints.width = width;
|
|
sizehints.height = height;
|
|
sizehints.flags = USSize | USPosition;
|
|
XSetNormalHints(dpy, win, &sizehints);
|
|
XSetStandardProperties(dpy, win, displayName, displayName,
|
|
None, (char **)NULL, 0, &sizehints);
|
|
}
|
|
|
|
|
|
ctx = glXCreateContext(dpy, visinfo, NULL, True);
|
|
if (!ctx) {
|
|
Error(displayName, "Couldn't create GLX context");
|
|
return NULL;
|
|
}
|
|
|
|
XMapWindow(dpy, win);
|
|
|
|
if (!glXMakeCurrent(dpy, win, ctx)) {
|
|
Error(displayName, "glXMakeCurrent failed");
|
|
printf("glXMakeCurrent failed in Redraw()\n");
|
|
return NULL;
|
|
}
|
|
|
|
/* save the info for this head */
|
|
{
|
|
struct head *h = &Heads[NumHeads];
|
|
strcpy(h->DisplayName, displayName);
|
|
h->Dpy = dpy;
|
|
h->Win = win;
|
|
h->Context = ctx;
|
|
h->Angle = 0.0;
|
|
strcpy(h->Version, (char *) glGetString(GL_VERSION));
|
|
strcpy(h->Vendor, (char *) glGetString(GL_VENDOR));
|
|
strcpy(h->Renderer, (char *) glGetString(GL_RENDERER));
|
|
NumHeads++;
|
|
return &Heads[NumHeads-1];
|
|
}
|
|
|
|
}
|
|
|
|
|
|
static void
|
|
Redraw(struct head *h)
|
|
{
|
|
if (!glXMakeCurrent(h->Dpy, h->Win, h->Context)) {
|
|
Error(h->DisplayName, "glXMakeCurrent failed");
|
|
printf("glXMakeCurrent failed in Redraw()\n");
|
|
return;
|
|
}
|
|
|
|
h->Angle += 1.0;
|
|
|
|
glShadeModel(GL_FLAT);
|
|
glClearColor(0.5, 0.5, 0.5, 1.0);
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
/* draw green triangle */
|
|
glColor3f(0.0, 1.0, 0.0);
|
|
glPushMatrix();
|
|
glRotatef(h->Angle, 0, 0, 1);
|
|
glBegin(GL_TRIANGLES);
|
|
glVertex2f(0, 0.8);
|
|
glVertex2f(-0.8, -0.7);
|
|
glVertex2f(0.8, -0.7);
|
|
glEnd();
|
|
glPopMatrix();
|
|
|
|
glXSwapBuffers(h->Dpy, h->Win);
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
Resize(const struct head *h, unsigned int width, unsigned int height)
|
|
{
|
|
if (!glXMakeCurrent(h->Dpy, h->Win, h->Context)) {
|
|
Error(h->DisplayName, "glXMakeCurrent failed in Resize()");
|
|
return;
|
|
}
|
|
glFlush();
|
|
glViewport(0, 0, width, height);
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
EventLoop(void)
|
|
{
|
|
while (1) {
|
|
int i;
|
|
for (i = 0; i < NumHeads; i++) {
|
|
struct head *h = &Heads[i];
|
|
while (XPending(h->Dpy) > 0) {
|
|
XEvent event;
|
|
XNextEvent(h->Dpy, &event);
|
|
if (event.xany.window == h->Win) {
|
|
switch (event.type) {
|
|
case Expose:
|
|
Redraw(h);
|
|
break;
|
|
case ConfigureNotify:
|
|
Resize(h, event.xconfigure.width, event.xconfigure.height);
|
|
break;
|
|
case KeyPress:
|
|
return;
|
|
default:
|
|
/*no-op*/ ;
|
|
}
|
|
}
|
|
else {
|
|
printf("window mismatch\n");
|
|
}
|
|
}
|
|
Redraw(h);
|
|
}
|
|
usleep(1);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
PrintInfo(const struct head *h)
|
|
{
|
|
printf("Name: %s\n", h->DisplayName);
|
|
printf(" Display: %p\n", (void *) h->Dpy);
|
|
printf(" Window: 0x%x\n", (int) h->Win);
|
|
printf(" Context: 0x%lx\n", (long) h->Context);
|
|
printf(" GL_VERSION: %s\n", h->Version);
|
|
printf(" GL_VENDOR: %s\n", h->Vendor);
|
|
printf(" GL_RENDERER: %s\n", h->Renderer);
|
|
}
|
|
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int i;
|
|
if (argc == 1) {
|
|
struct head *h;
|
|
printf("glxheads: exercise multiple GLX connections (any key = exit)\n");
|
|
printf("Usage:\n");
|
|
printf(" glxheads xdisplayname ...\n");
|
|
printf("Example:\n");
|
|
printf(" glxheads :0 mars:0 venus:1\n");
|
|
h = AddHead(":0");
|
|
if (h)
|
|
PrintInfo(h);
|
|
}
|
|
else {
|
|
for (i = 1; i < argc; i++) {
|
|
const char *name = argv[i];
|
|
struct head *h = AddHead(name);
|
|
if (h) {
|
|
PrintInfo(h);
|
|
}
|
|
}
|
|
}
|
|
|
|
EventLoop();
|
|
return 0;
|
|
}
|