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-rw-r--r--progs/egl/xeglthreads.c773
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diff --git a/progs/egl/xeglthreads.c b/progs/egl/xeglthreads.c
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+/*
+ * 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.
+ *
+ * Ported to EGL by Chia-I Wu <olvaffe@gmail.com>
+ */
+
+
+/*
+ * This program tests EGL thread safety.
+ * Command line options:
+ * -p Open a display connection for each thread
+ * -l Enable application-side locking
+ * -n <num threads> Number of threads to create (default is 2)
+ * -display <display name> Specify X display (default is $DISPLAY)
+ * -t Use texture mapping
+ *
+ * Brian Paul 20 July 2000
+ */
+
+
+/*
+ * Notes:
+ * - Each thread gets its own EGL context.
+ *
+ * - The EGL contexts share texture objects.
+ *
+ * - When 't' is pressed to update the texture image, the window/thread which
+ * has input focus is signalled to change the texture. The other threads
+ * should see the updated texture the next time they call glBindTexture.
+ */
+
+
+#if defined(PTHREADS) /* defined by Mesa on Linux and other platforms */
+
+#include <assert.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <GL/gl.h>
+#include <EGL/egl.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <pthread.h>
+
+
+/*
+ * Each window/thread/context:
+ */
+struct winthread {
+ Display *Dpy;
+ int Index;
+ pthread_t Thread;
+ Window Win;
+ EGLDisplay Display;
+ EGLContext Context;
+ EGLSurface Surface;
+ float Angle;
+ int WinWidth, WinHeight;
+ GLboolean NewSize;
+ GLboolean Initialized;
+ GLboolean MakeNewTexture;
+};
+
+
+#define MAX_WINTHREADS 100
+static struct winthread WinThreads[MAX_WINTHREADS];
+static int NumWinThreads = 0;
+static volatile GLboolean ExitFlag = GL_FALSE;
+
+static GLboolean MultiDisplays = 0;
+static GLboolean Locking = 0;
+static GLboolean Texture = GL_FALSE;
+static GLuint TexObj = 12;
+static GLboolean Animate = GL_TRUE;
+
+static pthread_mutex_t Mutex;
+static pthread_cond_t CondVar;
+static pthread_mutex_t CondMutex;
+
+
+static void
+Error(const char *msg)
+{
+ fprintf(stderr, "Error: %s\n", msg);
+ exit(1);
+}
+
+
+static void
+signal_redraw(void)
+{
+ pthread_mutex_lock(&CondMutex);
+ pthread_cond_broadcast(&CondVar);
+ pthread_mutex_unlock(&CondMutex);
+}
+
+
+static void
+MakeNewTexture(struct winthread *wt)
+{
+#define TEX_SIZE 128
+ static float step = 0.0;
+ GLfloat image[TEX_SIZE][TEX_SIZE][4];
+ GLint width;
+ int i, j;
+
+ for (j = 0; j < TEX_SIZE; j++) {
+ for (i = 0; i < TEX_SIZE; i++) {
+ float dt = 5.0 * (j - 0.5 * TEX_SIZE) / TEX_SIZE;
+ float ds = 5.0 * (i - 0.5 * TEX_SIZE) / TEX_SIZE;
+ float r = dt * dt + ds * ds + step;
+ image[j][i][0] =
+ image[j][i][1] =
+ image[j][i][2] = 0.75 + 0.25 * cos(r);
+ image[j][i][3] = 1.0;
+ }
+ }
+
+ step += 0.5;
+
+ glBindTexture(GL_TEXTURE_2D, TexObj);
+
+ glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width);
+ if (width) {
+ assert(width == TEX_SIZE);
+ /* sub-tex replace */
+ glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, TEX_SIZE, TEX_SIZE,
+ GL_RGBA, GL_FLOAT, image);
+ }
+ else {
+ /* create new */
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TEX_SIZE, TEX_SIZE, 0,
+ GL_RGBA, GL_FLOAT, image);
+ }
+}
+
+
+
+/* draw a colored cube */
+static void
+draw_object(void)
+{
+ glPushMatrix();
+ glScalef(0.75, 0.75, 0.75);
+
+ glColor3f(1, 0, 0);
+
+ if (Texture) {
+ glBindTexture(GL_TEXTURE_2D, TexObj);
+ glEnable(GL_TEXTURE_2D);
+ }
+ else {
+ glDisable(GL_TEXTURE_2D);
+ }
+
+ glBegin(GL_QUADS);
+
+ /* -X */
+ glColor3f(0, 1, 1);
+ glTexCoord2f(0, 0); glVertex3f(-1, -1, -1);
+ glTexCoord2f(1, 0); glVertex3f(-1, 1, -1);
+ glTexCoord2f(1, 1); glVertex3f(-1, 1, 1);
+ glTexCoord2f(0, 1); glVertex3f(-1, -1, 1);
+
+ /* +X */
+ glColor3f(1, 0, 0);
+ glTexCoord2f(0, 0); glVertex3f(1, -1, -1);
+ glTexCoord2f(1, 0); glVertex3f(1, 1, -1);
+ glTexCoord2f(1, 1); glVertex3f(1, 1, 1);
+ glTexCoord2f(0, 1); glVertex3f(1, -1, 1);
+
+ /* -Y */
+ glColor3f(1, 0, 1);
+ glTexCoord2f(0, 0); glVertex3f(-1, -1, -1);
+ glTexCoord2f(1, 0); glVertex3f( 1, -1, -1);
+ glTexCoord2f(1, 1); glVertex3f( 1, -1, 1);
+ glTexCoord2f(0, 1); glVertex3f(-1, -1, 1);
+
+ /* +Y */
+ glColor3f(0, 1, 0);
+ glTexCoord2f(0, 0); glVertex3f(-1, 1, -1);
+ glTexCoord2f(1, 0); glVertex3f( 1, 1, -1);
+ glTexCoord2f(1, 1); glVertex3f( 1, 1, 1);
+ glTexCoord2f(0, 1); glVertex3f(-1, 1, 1);
+
+ /* -Z */
+ glColor3f(1, 1, 0);
+ glTexCoord2f(0, 0); glVertex3f(-1, -1, -1);
+ glTexCoord2f(1, 0); glVertex3f( 1, -1, -1);
+ glTexCoord2f(1, 1); glVertex3f( 1, 1, -1);
+ glTexCoord2f(0, 1); glVertex3f(-1, 1, -1);
+
+ /* +Y */
+ glColor3f(0, 0, 1);
+ glTexCoord2f(0, 0); glVertex3f(-1, -1, 1);
+ glTexCoord2f(1, 0); glVertex3f( 1, -1, 1);
+ glTexCoord2f(1, 1); glVertex3f( 1, 1, 1);
+ glTexCoord2f(0, 1); glVertex3f(-1, 1, 1);
+
+ glEnd();
+
+ glPopMatrix();
+}
+
+
+/* signal resize of given window */
+static void
+resize(struct winthread *wt, int w, int h)
+{
+ wt->NewSize = GL_TRUE;
+ wt->WinWidth = w;
+ wt->WinHeight = h;
+ if (!Animate)
+ signal_redraw();
+}
+
+
+/*
+ * We have an instance of this for each thread.
+ */
+static void
+draw_loop(struct winthread *wt)
+{
+ while (!ExitFlag) {
+
+ if (Locking)
+ pthread_mutex_lock(&Mutex);
+
+ if (!wt->Initialized) {
+ eglMakeCurrent(wt->Display, wt->Surface, wt->Surface, wt->Context);
+ printf("xeglthreads: %d: GL_RENDERER = %s\n", wt->Index,
+ (char *) glGetString(GL_RENDERER));
+ if (Texture /*&& wt->Index == 0*/) {
+ MakeNewTexture(wt);
+ }
+ wt->Initialized = GL_TRUE;
+ }
+
+ if (Locking)
+ pthread_mutex_unlock(&Mutex);
+
+ eglBindAPI(EGL_OPENGL_API);
+ if (eglGetCurrentContext() != wt->Context) {
+ printf("xeglthreads: current context %p != %p\n",
+ eglGetCurrentContext(), wt->Context);
+ }
+
+ glEnable(GL_DEPTH_TEST);
+
+ if (wt->NewSize) {
+ GLfloat w = (float) wt->WinWidth / (float) wt->WinHeight;
+ glViewport(0, 0, wt->WinWidth, wt->WinHeight);
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glFrustum(-w, w, -1.0, 1.0, 1.5, 10);
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ glTranslatef(0, 0, -2.5);
+ wt->NewSize = GL_FALSE;
+ }
+
+ if (wt->MakeNewTexture) {
+ MakeNewTexture(wt);
+ wt->MakeNewTexture = GL_FALSE;
+ }
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ glPushMatrix();
+ glRotatef(wt->Angle, 0, 1, 0);
+ glRotatef(wt->Angle, 1, 0, 0);
+ glScalef(0.7, 0.7, 0.7);
+ draw_object();
+ glPopMatrix();
+
+ if (Locking)
+ pthread_mutex_lock(&Mutex);
+
+ eglSwapBuffers(wt->Display, wt->Surface);
+
+ if (Locking)
+ pthread_mutex_unlock(&Mutex);
+
+ if (Animate) {
+ usleep(5000);
+ }
+ else {
+ /* wait for signal to draw */
+ pthread_mutex_lock(&CondMutex);
+ pthread_cond_wait(&CondVar, &CondMutex);
+ pthread_mutex_unlock(&CondMutex);
+ }
+ wt->Angle += 1.0;
+ }
+ eglMakeCurrent(wt->Display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+}
+
+
+static void
+keypress(XEvent *event, struct winthread *wt)
+{
+ char buf[100];
+ KeySym keySym;
+ XComposeStatus stat;
+
+ XLookupString(&event->xkey, buf, sizeof(buf), &keySym, &stat);
+
+ switch (keySym) {
+ case XK_Escape:
+ /* tell all threads to exit */
+ if (!Animate) {
+ signal_redraw();
+ }
+ ExitFlag = GL_TRUE;
+ /*printf("exit draw_loop %d\n", wt->Index);*/
+ return;
+ case XK_t:
+ case XK_T:
+ if (Texture) {
+ wt->MakeNewTexture = GL_TRUE;
+ if (!Animate)
+ signal_redraw();
+ }
+ break;
+ case XK_a:
+ case XK_A:
+ Animate = !Animate;
+ if (Animate) /* yes, prev Animate state! */
+ signal_redraw();
+ break;
+ case XK_s:
+ case XK_S:
+ if (!Animate)
+ signal_redraw();
+ break;
+ default:
+ ; /* nop */
+ }
+}
+
+
+/*
+ * The main process thread runs this loop.
+ * Single display connection for all threads.
+ */
+static void
+event_loop(Display *dpy)
+{
+ XEvent event;
+ int i;
+
+ assert(!MultiDisplays);
+
+ while (!ExitFlag) {
+
+ if (Locking) {
+ while (1) {
+ int k;
+ pthread_mutex_lock(&Mutex);
+ k = XPending(dpy);
+ if (k) {
+ XNextEvent(dpy, &event);
+ pthread_mutex_unlock(&Mutex);
+ break;
+ }
+ pthread_mutex_unlock(&Mutex);
+ usleep(5000);
+ }
+ }
+ else {
+ XNextEvent(dpy, &event);
+ }
+
+ switch (event.type) {
+ case ConfigureNotify:
+ /* Find winthread for this event's window */
+ for (i = 0; i < NumWinThreads; i++) {
+ struct winthread *wt = &WinThreads[i];
+ if (event.xconfigure.window == wt->Win) {
+ resize(wt, event.xconfigure.width,
+ event.xconfigure.height);
+ break;
+ }
+ }
+ break;
+ case KeyPress:
+ for (i = 0; i < NumWinThreads; i++) {
+ struct winthread *wt = &WinThreads[i];
+ if (event.xkey.window == wt->Win) {
+ keypress(&event, wt);
+ break;
+ }
+ }
+ break;
+ default:
+ /*no-op*/ ;
+ }
+ }
+}
+
+
+/*
+ * Separate display connection for each thread.
+ */
+static void
+event_loop_multi(void)
+{
+ XEvent event;
+ int w = 0;
+
+ assert(MultiDisplays);
+
+ while (!ExitFlag) {
+ struct winthread *wt = &WinThreads[w];
+ if (XPending(wt->Dpy)) {
+ XNextEvent(wt->Dpy, &event);
+ switch (event.type) {
+ case ConfigureNotify:
+ resize(wt, event.xconfigure.width, event.xconfigure.height);
+ break;
+ case KeyPress:
+ keypress(&event, wt);
+ break;
+ default:
+ ; /* nop */
+ }
+ }
+ w = (w + 1) % NumWinThreads;
+ usleep(5000);
+ }
+}
+
+
+
+/*
+ * we'll call this once for each thread, before the threads are created.
+ */
+static void
+create_window(struct winthread *wt, EGLContext shareCtx)
+{
+ Window win;
+ EGLContext ctx;
+ EGLSurface surf;
+ EGLint attribs[] = { EGL_RED_SIZE, 1,
+ EGL_GREEN_SIZE, 1,
+ EGL_BLUE_SIZE, 1,
+ EGL_DEPTH_SIZE, 1,
+ EGL_NONE };
+ EGLConfig config;
+ EGLint num_configs;
+ EGLint vid;
+ int scrnum;
+ XSetWindowAttributes attr;
+ unsigned long mask;
+ Window root;
+ XVisualInfo *visinfo, visTemplate;
+ int num_visuals;
+ int width = 160, height = 160;
+ int xpos = (wt->Index % 8) * (width + 10);
+ int ypos = (wt->Index / 8) * (width + 20);
+
+ scrnum = DefaultScreen(wt->Dpy);
+ root = RootWindow(wt->Dpy, scrnum);
+
+ if (!eglChooseConfig(wt->Display, attribs, &config, 1, &num_configs)) {
+ Error("Unable to choose an EGL config");
+ }
+
+ assert(config);
+ assert(num_configs > 0);
+
+ if (!eglGetConfigAttrib(wt->Display, config, EGL_NATIVE_VISUAL_ID, &vid)) {
+ Error("Unable to get visual id of EGL config\n");
+ }
+
+ visTemplate.visualid = vid;
+ visinfo = XGetVisualInfo(wt->Dpy, VisualIDMask,
+ &visTemplate, &num_visuals);
+ if (!visinfo) {
+ Error("Unable to find RGB, Z, double-buffered visual");
+ }
+
+ /* window attributes */
+ attr.background_pixel = 0;
+ attr.border_pixel = 0;
+ attr.colormap = XCreateColormap(wt->Dpy, root, visinfo->visual, AllocNone);
+ attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+ mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+ win = XCreateWindow(wt->Dpy, root, xpos, ypos, width, height,
+ 0, visinfo->depth, InputOutput,
+ visinfo->visual, mask, &attr);
+ if (!win) {
+ Error("Couldn't create window");
+ }
+
+ XFree(visinfo);
+
+ {
+ XSizeHints sizehints;
+ sizehints.x = xpos;
+ sizehints.y = ypos;
+ sizehints.width = width;
+ sizehints.height = height;
+ sizehints.flags = USSize | USPosition;
+ XSetNormalHints(wt->Dpy, win, &sizehints);
+ XSetStandardProperties(wt->Dpy, win, "xeglthreads", "xeglthreads",
+ None, (char **)NULL, 0, &sizehints);
+ }
+
+ eglBindAPI(EGL_OPENGL_API);
+
+ ctx = eglCreateContext(wt->Display, config, shareCtx, NULL);
+ if (!ctx) {
+ Error("Couldn't create EGL context");
+ }
+ surf = eglCreateWindowSurface(wt->Display, config, win, NULL);
+ if (!surf) {
+ Error("Couldn't create EGL surface");
+ }
+
+ XMapWindow(wt->Dpy, win);
+ XSync(wt->Dpy, 0);
+
+ /* save the info for this window/context */
+ wt->Win = win;
+ wt->Context = ctx;
+ wt->Surface = surf;
+ wt->Angle = 0.0;
+ wt->WinWidth = width;
+ wt->WinHeight = height;
+ wt->NewSize = GL_TRUE;
+}
+
+
+/*
+ * Called by pthread_create()
+ */
+static void *
+thread_function(void *p)
+{
+ struct winthread *wt = (struct winthread *) p;
+ draw_loop(wt);
+ return NULL;
+}
+
+
+/*
+ * called before exit to wait for all threads to finish
+ */
+static void
+clean_up(void)
+{
+ int i;
+
+ /* wait for threads to finish */
+ for (i = 0; i < NumWinThreads; i++) {
+ pthread_join(WinThreads[i].Thread, NULL);
+ }
+
+ for (i = 0; i < NumWinThreads; i++) {
+ eglDestroyContext(WinThreads[i].Display, WinThreads[i].Context);
+ XDestroyWindow(WinThreads[i].Dpy, WinThreads[i].Win);
+ }
+}
+
+
+static void
+usage(void)
+{
+ printf("xeglthreads: test of EGL/GL thread safety (any key = exit)\n");
+ printf("Usage:\n");
+ printf(" xeglthreads [options]\n");
+ printf("Options:\n");
+ printf(" -display DISPLAYNAME Specify display string\n");
+ printf(" -n NUMTHREADS Number of threads to create\n");
+ printf(" -p Use a separate display connection for each thread\n");
+ printf(" -l Use application-side locking\n");
+ printf(" -t Enable texturing\n");
+ printf("Keyboard:\n");
+ printf(" Esc Exit\n");
+ printf(" t Change texture image (requires -t option)\n");
+ printf(" a Toggle animation\n");
+ printf(" s Step rotation (when not animating)\n");
+}
+
+
+int
+main(int argc, char *argv[])
+{
+ char *displayName = NULL;
+ int numThreads = 2;
+ Display *dpy = NULL;
+ EGLDisplay *egl_dpy = NULL;
+ int i;
+ Status threadStat;
+
+ if (argc == 1) {
+ usage();
+ }
+ else {
+ int i;
+ for (i = 1; i < argc; i++) {
+ if (strcmp(argv[i], "-display") == 0 && i + 1 < argc) {
+ displayName = argv[i + 1];
+ i++;
+ }
+ else if (strcmp(argv[i], "-p") == 0) {
+ MultiDisplays = 1;
+ }
+ else if (strcmp(argv[i], "-l") == 0) {
+ Locking = 1;
+ }
+ else if (strcmp(argv[i], "-t") == 0) {
+ Texture = 1;
+ }
+ else if (strcmp(argv[i], "-n") == 0 && i + 1 < argc) {
+ numThreads = atoi(argv[i + 1]);
+ if (numThreads < 1)
+ numThreads = 1;
+ else if (numThreads > MAX_WINTHREADS)
+ numThreads = MAX_WINTHREADS;
+ i++;
+ }
+ else {
+ usage();
+ exit(1);
+ }
+ }
+ }
+
+ if (Locking)
+ printf("xeglthreads: Using explicit locks around Xlib calls.\n");
+ else
+ printf("xeglthreads: No explict locking.\n");
+
+ if (MultiDisplays)
+ printf("xeglthreads: Per-thread display connections.\n");
+ else
+ printf("xeglthreads: Single display connection.\n");
+
+ /*
+ * VERY IMPORTANT: call XInitThreads() before any other Xlib functions.
+ */
+ if (!MultiDisplays) {
+ if (!Locking) {
+ threadStat = XInitThreads();
+ if (threadStat) {
+ printf("XInitThreads() returned %d (success)\n",
+ (int) threadStat);
+ }
+ else {
+ printf("XInitThreads() returned 0 "
+ "(failure- this program may fail)\n");
+ }
+ }
+
+ dpy = XOpenDisplay(displayName);
+ if (!dpy) {
+ fprintf(stderr, "Unable to open display %s\n",
+ XDisplayName(displayName));
+ return -1;
+ }
+ egl_dpy = eglGetDisplay(dpy);
+ if (!egl_dpy) {
+ fprintf(stderr, "Unable to get EGL display\n");
+ XCloseDisplay(dpy);
+ return -1;
+ }
+ if (!eglInitialize(egl_dpy, NULL, NULL)) {
+ fprintf(stderr, "Unable to initialize EGL display\n");
+ return -1;
+ }
+ }
+
+ pthread_mutex_init(&Mutex, NULL);
+ pthread_mutex_init(&CondMutex, NULL);
+ pthread_cond_init(&CondVar, NULL);
+
+ printf("xeglthreads: creating windows\n");
+
+ NumWinThreads = numThreads;
+
+ /* Create the EGL windows and contexts */
+ for (i = 0; i < numThreads; i++) {
+ EGLContext share;
+
+ if (MultiDisplays) {
+ WinThreads[i].Dpy = XOpenDisplay(displayName);
+ assert(WinThreads[i].Dpy);
+ WinThreads[i].Display = eglGetDisplay(WinThreads[i].Dpy);
+ assert(eglInitialize(WinThreads[i].Display, NULL, NULL));
+ }
+ else {
+ WinThreads[i].Dpy = dpy;
+ WinThreads[i].Display = egl_dpy;
+ }
+ WinThreads[i].Index = i;
+ WinThreads[i].Initialized = GL_FALSE;
+
+ share = (Texture && i > 0) ? WinThreads[0].Context : 0;
+
+ create_window(&WinThreads[i], share);
+ }
+
+ printf("xeglthreads: creating threads\n");
+
+ /* Create the threads */
+ for (i = 0; i < numThreads; i++) {
+ pthread_create(&WinThreads[i].Thread, NULL, thread_function,
+ (void*) &WinThreads[i]);
+ printf("xeglthreads: Created thread %p\n",
+ (void *) WinThreads[i].Thread);
+ }
+
+ if (MultiDisplays)
+ event_loop_multi();
+ else
+ event_loop(dpy);
+
+ clean_up();
+
+ if (MultiDisplays) {
+ for (i = 0; i < numThreads; i++) {
+ eglTerminate(WinThreads[i].Display);
+ XCloseDisplay(WinThreads[i].Dpy);
+ }
+ }
+ else {
+ eglTerminate(egl_dpy);
+ XCloseDisplay(dpy);
+ }
+
+ return 0;
+}
+
+
+#else /* PTHREADS */
+
+
+#include <stdio.h>
+
+int
+main(int argc, char *argv[])
+{
+ printf("Sorry, this program wasn't compiled with PTHREADS defined.\n");
+ return 0;
+}
+
+
+#endif /* PTHREADS */
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