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-rw-r--r--progs/xdemos/multictx.c585
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diff --git a/progs/xdemos/multictx.c b/progs/xdemos/multictx.c
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--- a/progs/xdemos/multictx.c
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-/*
- * Copyright (C) 2009 VMware, Inc. 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.
- */
-
-/*
- * Test rendering with two contexts into one window.
- * Setup different rendering state for each context to check that
- * context switching is handled properly.
- *
- * Brian Paul
- * 6 Aug 2009
- */
-
-
-#include <math.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/time.h>
-#include <unistd.h>
-#include <X11/Xlib.h>
-#include <X11/keysym.h>
-#include <GL/gl.h>
-#include <GL/glx.h>
-
-
-
-#ifndef M_PI
-#define M_PI 3.14159265
-#endif
-
-
-/** Event handler results: */
-#define NOP 0
-#define EXIT 1
-#define DRAW 2
-
-static GLfloat view_rotx = 0.0, view_roty = 210.0, view_rotz = 0.0;
-static GLint gear1, gear2;
-static GLfloat angle = 0.0;
-
-static GLboolean animate = GL_TRUE; /* Animation */
-
-
-static double
-current_time(void)
-{
- struct timeval tv;
-#ifdef __VMS
- (void) gettimeofday(&tv, NULL );
-#else
- struct timezone tz;
- (void) gettimeofday(&tv, &tz);
-#endif
- return (double) tv.tv_sec + tv.tv_usec / 1000000.0;
-}
-
-
-/*
- *
- * Draw a gear wheel. You'll probably want to call this function when
- * building a display list since we do a lot of trig here.
- *
- * Input: inner_radius - radius of hole at center
- * outer_radius - radius at center of teeth
- * width - width of gear
- * teeth - number of teeth
- * tooth_depth - depth of tooth
- */
-static void
-gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
- GLint teeth, GLfloat tooth_depth)
-{
- GLint i;
- GLfloat r0, r1, r2;
- GLfloat angle, da;
- GLfloat u, v, len;
-
- r0 = inner_radius;
- r1 = outer_radius - tooth_depth / 2.0;
- r2 = outer_radius + tooth_depth / 2.0;
-
- da = 2.0 * M_PI / teeth / 4.0;
-
- glShadeModel(GL_FLAT);
-
- glNormal3f(0.0, 0.0, 1.0);
-
- /* draw front face */
- glBegin(GL_QUAD_STRIP);
- for (i = 0; i <= teeth; i++) {
- angle = i * 2.0 * M_PI / teeth;
- glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
- glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
- if (i < teeth) {
- glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
- glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
- width * 0.5);
- }
- }
- glEnd();
-
- /* draw front sides of teeth */
- glBegin(GL_QUADS);
- da = 2.0 * M_PI / teeth / 4.0;
- for (i = 0; i < teeth; i++) {
- angle = i * 2.0 * M_PI / teeth;
-
- glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
- glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
- glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
- width * 0.5);
- glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
- width * 0.5);
- }
- glEnd();
-
- glNormal3f(0.0, 0.0, -1.0);
-
- /* draw back face */
- glBegin(GL_QUAD_STRIP);
- for (i = 0; i <= teeth; i++) {
- angle = i * 2.0 * M_PI / teeth;
- glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
- glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
- if (i < teeth) {
- glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
- -width * 0.5);
- glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
- }
- }
- glEnd();
-
- /* draw back sides of teeth */
- glBegin(GL_QUADS);
- da = 2.0 * M_PI / teeth / 4.0;
- for (i = 0; i < teeth; i++) {
- angle = i * 2.0 * M_PI / teeth;
-
- glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
- -width * 0.5);
- glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
- -width * 0.5);
- glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
- glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
- }
- glEnd();
-
- /* draw outward faces of teeth */
- glBegin(GL_QUAD_STRIP);
- for (i = 0; i < teeth; i++) {
- angle = i * 2.0 * M_PI / teeth;
-
- glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
- glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
- u = r2 * cos(angle + da) - r1 * cos(angle);
- v = r2 * sin(angle + da) - r1 * sin(angle);
- len = sqrt(u * u + v * v);
- u /= len;
- v /= len;
- glNormal3f(v, -u, 0.0);
- glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
- glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
- glNormal3f(cos(angle), sin(angle), 0.0);
- glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
- width * 0.5);
- glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
- -width * 0.5);
- u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
- v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
- glNormal3f(v, -u, 0.0);
- glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
- width * 0.5);
- glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
- -width * 0.5);
- glNormal3f(cos(angle), sin(angle), 0.0);
- }
-
- glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
- glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
-
- glEnd();
-
- glShadeModel(GL_SMOOTH);
-
- /* draw inside radius cylinder */
- glBegin(GL_QUAD_STRIP);
- for (i = 0; i <= teeth; i++) {
- angle = i * 2.0 * M_PI / teeth;
- glNormal3f(-cos(angle), -sin(angle), 0.0);
- glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
- glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
- }
- glEnd();
-}
-
-
-static void
-draw(int ctx)
-{
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glPushMatrix();
- glRotatef(view_rotx, 1.0, 0.0, 0.0);
- glRotatef(view_roty + angle, 0.0, 1.0, 0.0);
- glRotatef(view_rotz, 0.0, 0.0, 1.0);
-
- if (ctx == 0) {
- glDisable(GL_CULL_FACE);
- glPushMatrix();
- glRotatef(angle, 0.0, 0.0, 1.0);
- glCallList(gear1);
- glPopMatrix();
- /* This should not effect the other context's rendering */
- glEnable(GL_CULL_FACE);
- glCullFace(GL_FRONT_AND_BACK);
- }
- else {
- glPushMatrix();
- glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
- glCallList(gear2);
- glPopMatrix();
- }
-
- glPopMatrix();
-
- /* this flush is important since we'll be switching contexts next */
- glFlush();
-}
-
-
-
-static void
-draw_frame(Display *dpy, Window win, GLXContext ctx1, GLXContext ctx2)
-{
- static double tRot0 = -1.0;
- double dt, t = current_time();
-
- if (tRot0 < 0.0)
- tRot0 = t;
- dt = t - tRot0;
- tRot0 = t;
-
- if (animate) {
- /* advance rotation for next frame */
- angle += 70.0 * dt; /* 70 degrees per second */
- if (angle > 3600.0)
- angle -= 3600.0;
- }
-
- glXMakeCurrent(dpy, (GLXDrawable) win, ctx1);
- draw(0);
-
- glXMakeCurrent(dpy, (GLXDrawable) win, ctx2);
- draw(1);
-
- glXSwapBuffers(dpy, win);
-}
-
-
-/* new window size or exposure */
-static void
-reshape(Display *dpy, Window win,
- GLXContext ctx1, GLXContext ctx2, int width, int height)
-{
- int i;
-
- width /= 2;
-
- /* loop: left half of window, right half of window */
- for (i = 0; i < 2; i++) {
- if (i == 0)
- glXMakeCurrent(dpy, win, ctx1);
- else
- glXMakeCurrent(dpy, win, ctx2);
-
- glViewport(width * i, 0, width, height);
- glScissor(width * i, 0, width, height);
-
- {
- GLfloat h = (GLfloat) height / (GLfloat) width;
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
- }
-
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef(0.0, 0.0, -30.0);
- }
-}
-
-
-
-static void
-init(Display *dpy, Window win, GLXContext ctx1, GLXContext ctx2)
-{
- static GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
- static GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
- static GLfloat green[4] = { 0.0, 0.8, 0.2, 0.5 };
- /*static GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };*/
-
- /* first ctx */
- {
- static GLuint stipple[32] = {
- 0x00ff00ff, 0x00ff00ff, 0x00ff00ff, 0x00ff00ff,
- 0x00ff00ff, 0x00ff00ff, 0x00ff00ff, 0x00ff00ff,
-
- 0xff00ff00, 0xff00ff00, 0xff00ff00, 0xff00ff00,
- 0xff00ff00, 0xff00ff00, 0xff00ff00, 0xff00ff00,
-
- 0x00ff00ff, 0x00ff00ff, 0x00ff00ff, 0x00ff00ff,
- 0x00ff00ff, 0x00ff00ff, 0x00ff00ff, 0x00ff00ff,
-
- 0xff00ff00, 0xff00ff00, 0xff00ff00, 0xff00ff00,
- 0xff00ff00, 0xff00ff00, 0xff00ff00, 0xff00ff00
- };
-
- glXMakeCurrent(dpy, win, ctx1);
-
- glLightfv(GL_LIGHT0, GL_POSITION, pos);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- glEnable(GL_DEPTH_TEST);
-
- gear1 = glGenLists(1);
- glNewList(gear1, GL_COMPILE);
- glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
- gear(1.0, 4.0, 1.0, 20, 0.7);
- glEndList();
-
- glEnable(GL_NORMALIZE);
- glEnable(GL_SCISSOR_TEST);
- glClearColor(0.4, 0.4, 0.4, 1.0);
-
- glPolygonStipple((GLubyte *) stipple);
- glEnable(GL_POLYGON_STIPPLE);
- }
-
- /* second ctx */
- {
- glXMakeCurrent(dpy, win, ctx2);
-
- glLightfv(GL_LIGHT0, GL_POSITION, pos);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- glEnable(GL_DEPTH_TEST);
-
- gear2 = glGenLists(1);
- glNewList(gear2, GL_COMPILE);
- glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
- gear(1.5, 3.0, 1.5, 16, 0.7);
- glEndList();
-
- glEnable(GL_NORMALIZE);
- glEnable(GL_SCISSOR_TEST);
- glClearColor(0.6, 0.6, 0.6, 1.0);
-
- glEnable(GL_BLEND);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- }
-}
-
-
-/**
- * Create an RGB, double-buffered window.
- * Return the window and two context handles.
- */
-static void
-make_window_and_contexts( Display *dpy, const char *name,
- int x, int y, int width, int height,
- Window *winRet,
- GLXContext *ctxRet1,
- GLXContext *ctxRet2)
-{
- 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;
- XSetWindowAttributes attr;
- unsigned long mask;
- Window root;
- Window win;
- XVisualInfo *visinfo;
-
- scrnum = DefaultScreen( dpy );
- root = RootWindow( dpy, scrnum );
-
- visinfo = glXChooseVisual( dpy, scrnum, attribs );
- if (!visinfo) {
- printf("Error: couldn't get an RGB, Double-buffered visual\n");
- exit(1);
- }
-
- /* 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);
- }
-
- *winRet = win;
- *ctxRet1 = glXCreateContext( dpy, visinfo, NULL, True );
- *ctxRet2 = glXCreateContext( dpy, visinfo, NULL, True );
-
- if (!*ctxRet1 || !*ctxRet2) {
- printf("Error: glXCreateContext failed\n");
- exit(1);
- }
-
- XFree(visinfo);
-}
-
-
-/**
- * Handle one X event.
- * \return NOP, EXIT or DRAW
- */
-static int
-handle_event(Display *dpy, Window win, GLXContext ctx1, GLXContext ctx2,
- XEvent *event)
-{
- (void) dpy;
- (void) win;
-
- switch (event->type) {
- case Expose:
- return DRAW;
- case ConfigureNotify:
- reshape(dpy, win, ctx1, ctx2,
- event->xconfigure.width, event->xconfigure.height);
- break;
- case KeyPress:
- {
- char buffer[10];
- int r, code;
- code = XLookupKeysym(&event->xkey, 0);
- if (code == XK_Left) {
- view_roty += 5.0;
- }
- else if (code == XK_Right) {
- view_roty -= 5.0;
- }
- else if (code == XK_Up) {
- view_rotx += 5.0;
- }
- else if (code == XK_Down) {
- view_rotx -= 5.0;
- }
- else {
- r = XLookupString(&event->xkey, buffer, sizeof(buffer),
- NULL, NULL);
- if (buffer[0] == 27) {
- /* escape */
- return EXIT;
- }
- else if (buffer[0] == 'a' || buffer[0] == 'A') {
- animate = !animate;
- }
- }
- return DRAW;
- }
- }
- return NOP;
-}
-
-
-static void
-event_loop(Display *dpy, Window win, GLXContext ctx1, GLXContext ctx2)
-{
- while (1) {
- int op;
- while (!animate || XPending(dpy) > 0) {
- XEvent event;
- XNextEvent(dpy, &event);
- op = handle_event(dpy, win, ctx1, ctx2, &event);
- if (op == EXIT)
- return;
- else if (op == DRAW)
- break;
- }
-
- draw_frame(dpy, win, ctx1, ctx2);
- }
-}
-
-
-int
-main(int argc, char *argv[])
-{
- unsigned int winWidth = 800, winHeight = 400;
- int x = 0, y = 0;
- Display *dpy;
- Window win;
- GLXContext ctx1, ctx2;
- char *dpyName = NULL;
- GLboolean printInfo = GL_FALSE;
- int i;
-
- for (i = 1; i < argc; i++) {
- if (strcmp(argv[i], "-display") == 0) {
- dpyName = argv[i+1];
- i++;
- }
- else {
- return 1;
- }
- }
-
- dpy = XOpenDisplay(dpyName);
- if (!dpy) {
- printf("Error: couldn't open display %s\n",
- dpyName ? dpyName : getenv("DISPLAY"));
- return -1;
- }
-
- make_window_and_contexts(dpy, "multictx", x, y, winWidth, winHeight,
- &win, &ctx1, &ctx2);
- XMapWindow(dpy, win);
-
- if (printInfo) {
- printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
- printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
- printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
- printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
- }
-
- init(dpy, win, ctx1, ctx2);
-
- /* Set initial projection/viewing transformation.
- * We can't be sure we'll get a ConfigureNotify event when the window
- * first appears.
- */
- reshape(dpy, win, ctx1, ctx2, winWidth, winHeight);
-
- event_loop(dpy, win, ctx1, ctx2);
-
- glDeleteLists(gear1, 1);
- glDeleteLists(gear2, 1);
- glXDestroyContext(dpy, ctx1);
- glXDestroyContext(dpy, ctx2);
- XDestroyWindow(dpy, win);
- XCloseDisplay(dpy);
-
- return 0;
-}
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