+++ /dev/null
-/**
- * Example of cooperative rendering into one window by two processes.
- * The first instance of the program creates the GLX window.
- * The second instance of the program gets the window ID from the first
- * and draws into it.
- * Socket IPC is used for synchronization.
- *
- * Usage:
- * 1. run 'corender &'
- * 2. run 'corender 2' (any arg will do)
- *
- * Brian Paul
- * 11 Oct 2007
- */
-
-
-#include <GL/gl.h>
-#include <GL/glx.h>
-#include <assert.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <X11/keysym.h>
-#include <unistd.h>
-#include "ipc.h"
-
-
-#ifndef M_PI
-#define M_PI 3.14159265358979323846
-#endif
-
-static int MyID = 0; /* 0 or 1 */
-static int WindowID = 0;
-static GLXContext Context = 0;
-static int Width = 700, Height = 350;
-static int Rot = 0;
-static int Sock = 0;
-
-static GLfloat Red[4] = {1.0, 0.2, 0.2, 1.0};
-static GLfloat Blue[4] = {0.2, 0.2, 1.0, 1.0};
-
-static int Sync = 1; /** synchronized rendering? */
-
-
-static void
-setup_ipc(void)
-{
- int k, port = 10001;
-
- if (MyID == 0) {
- /* I'm the first one, wait for connection from second */
- k = CreatePort(&port);
- assert(k != -1);
-
- printf("Waiting for connection from another 'corender'\n");
- Sock = AcceptConnection(k);
- assert(Sock != -1);
-
- printf("Got connection, sending windowID\n");
-
- /* send windowID */
- SendData(Sock, &WindowID, sizeof(WindowID));
- }
- else {
- /* I'm the second one, connect to first */
- char hostname[1000];
-
- MyHostName(hostname, 1000);
- Sock = Connect(hostname, port);
- assert(Sock != -1);
-
- /* get windowID */
- ReceiveData(Sock, &WindowID, sizeof(WindowID));
- printf("Contacted first 'corender', getting WindowID\n");
- }
-}
-
-
-
-/** from GLUT */
-static void
-doughnut(GLfloat r, GLfloat R, GLint nsides, GLint rings)
-{
- int i, j;
- GLfloat theta, phi, theta1;
- GLfloat cosTheta, sinTheta;
- GLfloat cosTheta1, sinTheta1;
- GLfloat ringDelta, sideDelta;
-
- ringDelta = 2.0 * M_PI / rings;
- sideDelta = 2.0 * M_PI / nsides;
-
- theta = 0.0;
- cosTheta = 1.0;
- sinTheta = 0.0;
- for (i = rings - 1; i >= 0; i--) {
- theta1 = theta + ringDelta;
- cosTheta1 = cos(theta1);
- sinTheta1 = sin(theta1);
- glBegin(GL_QUAD_STRIP);
- phi = 0.0;
- for (j = nsides; j >= 0; j--) {
- GLfloat cosPhi, sinPhi, dist;
-
- phi += sideDelta;
- cosPhi = cos(phi);
- sinPhi = sin(phi);
- dist = R + r * cosPhi;
-
- glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi);
- glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi);
- glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi);
- glVertex3f(cosTheta * dist, -sinTheta * dist, r * sinPhi);
- }
- glEnd();
- theta = theta1;
- cosTheta = cosTheta1;
- sinTheta = sinTheta1;
- }
-}
-
-
-static void
-redraw(Display *dpy)
-{
- int dbg = 0;
-
- glXMakeCurrent(dpy, WindowID, Context);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- glEnable(GL_DEPTH_TEST);
- glClearColor(0.5, 0.5, 0.5, 0.0);
-
- if (MyID == 0) {
- /* First process */
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glPushMatrix();
- glTranslatef(-1, 0, 0);
- glRotatef(Rot, 1, 0, 0);
- glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, Red);
- doughnut(0.5, 2.0, 20, 30);
- glPopMatrix();
-
- glFinish();
- if (!Sync) {
- usleep(1000*10);
- }
-
- /* signal second process to render */
- if (Sync) {
- int code = 1;
- if (dbg) printf("0: send signal\n");
- SendData(Sock, &code, sizeof(code));
- SendData(Sock, &Rot, sizeof(Rot));
- }
-
- /* wait for second process to finish rendering */
- if (Sync) {
- int code = 0;
- if (dbg) printf("0: wait signal\n");
- ReceiveData(Sock, &code, sizeof(code));
- if (dbg) printf("0: got signal\n");
- assert(code == 2);
- }
-
- }
- else {
- /* Second process */
-
- /* wait for first process's signal for me to render */
- if (Sync) {
- int code = 0;
- if (dbg) printf("1: wait signal\n");
- ReceiveData(Sock, &code, sizeof(code));
- ReceiveData(Sock, &Rot, sizeof(Rot));
-
- if (dbg) printf("1: got signal\n");
- assert(code == 1);
- }
-
- /* XXX this clear should not be here, but for some reason, it
- * makes things _mostly_ work correctly w/ NVIDIA's driver.
- * There's only occasional glitches.
- * Without this glClear(), depth buffer for the second process
- * is pretty much broken.
- */
- /* glClear(GL_DEPTH_BUFFER_BIT); */
-
- glPushMatrix();
- glTranslatef(1, 0, 0);
- glRotatef(Rot + 90 , 1, 0, 0);
- glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, Blue);
- doughnut(0.5, 2.0, 20, 30);
- glPopMatrix();
- glFinish();
-
- glXSwapBuffers(dpy, WindowID);
- usleep(1000*10);
-
- /* signal first process that I'm done rendering */
- if (Sync) {
- int code = 2;
- if (dbg) printf("1: send signal\n");
- SendData(Sock, &code, sizeof(code));
- }
- }
-}
-
-
-static void
-resize(Display *dpy, int width, int height)
-{
- float ar = (float) width / height;
-
- glXMakeCurrent(dpy, WindowID, Context);
-
- glViewport(0, 0, width, height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum(-ar, ar, 1.0, -1.0, 5.0, 200.0);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef(0, 0, -15);
-
- Width = width;
- Height = height;
-}
-
-
-
-static void
-set_window_title(Display *dpy, Window win, const char *title)
-{
- XSizeHints sizehints;
- sizehints.flags = 0;
- XSetStandardProperties(dpy, win, title, title,
- None, (char **)NULL, 0, &sizehints);
-}
-
-
-static Window
-make_gl_window(Display *dpy, XVisualInfo *visinfo, int width, int height)
-{
- int scrnum;
- XSetWindowAttributes attr;
- unsigned long mask;
- Window root;
- Window win;
- int x = 0, y = 0;
- char *name = NULL;
-
- scrnum = DefaultScreen( dpy );
- root = RootWindow( dpy, scrnum );
-
- /* 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, x, y, width, height,
- 0, visinfo->depth, InputOutput,
- visinfo->visual, mask, &attr );
-
- /* set hints and properties */
- {
- XSizeHints sizehints;
- sizehints.x = x;
- sizehints.y = y;
- sizehints.width = width;
- sizehints.height = height;
- sizehints.flags = USSize | USPosition;
- XSetNormalHints(dpy, win, &sizehints);
- XSetStandardProperties(dpy, win, name, name,
- None, (char **)NULL, 0, &sizehints);
- }
-
- return win;
-}
-
-
-static void
-set_event_mask(Display *dpy, Window win)
-{
- XSetWindowAttributes attr;
- attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
- XChangeWindowAttributes(dpy, win, CWEventMask, &attr);
-}
-
-
-static void
-event_loop(Display *dpy)
-{
- while (1) {
- while (XPending(dpy) > 0) {
- XEvent event;
- XNextEvent(dpy, &event);
-
- switch (event.type) {
- case Expose:
- redraw(dpy);
- break;
- case ConfigureNotify:
- resize(dpy, event.xconfigure.width, event.xconfigure.height);
- break;
- case KeyPress:
- {
- char buffer[10];
- int r, code;
- code = XLookupKeysym(&event.xkey, 0);
- if (code == XK_Left) {
- }
- else {
- r = XLookupString(&event.xkey, buffer, sizeof(buffer),
- NULL, NULL);
- if (buffer[0] == 27) {
- exit(0);
- }
- }
- }
- default:
- /* nothing */
- ;
- }
- }
-
- if (MyID == 0 || !Sync)
- Rot += 1;
- redraw(dpy);
- }
-}
-
-
-static XVisualInfo *
-choose_visual(Display *dpy)
-{
- int attribs[] = { GLX_RGBA,
- GLX_RED_SIZE, 1,
- GLX_GREEN_SIZE, 1,
- GLX_BLUE_SIZE, 1,
- GLX_DOUBLEBUFFER,
- GLX_DEPTH_SIZE, 1,
- None };
- int scrnum = DefaultScreen( dpy );
- return glXChooseVisual(dpy, scrnum, attribs);
-}
-
-
-static void
-parse_opts(int argc, char *argv[])
-{
- if (argc > 1) {
- MyID = 1;
- }
-}
-
-
-int
-main( int argc, char *argv[] )
-{
- Display *dpy;
- XVisualInfo *visinfo;
-
- parse_opts(argc, argv);
-
- dpy = XOpenDisplay(NULL);
-
- visinfo = choose_visual(dpy);
-
- Context = glXCreateContext( dpy, visinfo, NULL, True );
- if (!Context) {
- printf("Error: glXCreateContext failed\n");
- exit(1);
- }
-
- if (MyID == 0) {
- WindowID = make_gl_window(dpy, visinfo, Width, Height);
- set_window_title(dpy, WindowID, "corender");
- XMapWindow(dpy, WindowID);
- /*printf("WindowID 0x%x\n", (int) WindowID);*/
- }
-
- /* do ipc hand-shake here */
- setup_ipc();
- assert(Sock);
- assert(WindowID);
-
- if (MyID == 1) {
- set_event_mask(dpy, WindowID);
- }
-
- resize(dpy, Width, Height);
-
- event_loop(dpy);
-
- return 0;
-}
projects / mesa.git / blobdiff