diff options
Diffstat (limited to 'progs/egl/opengl/xeglthreads.c')
| -rw-r--r-- | progs/egl/opengl/xeglthreads.c | 775 |
1 files changed, 775 insertions, 0 deletions
diff --git a/progs/egl/opengl/xeglthreads.c b/progs/egl/opengl/xeglthreads.c new file mode 100644 index 00000000000..5787faecb90 --- /dev/null +++ b/progs/egl/opengl/xeglthreads.c @@ -0,0 +1,775 @@ +/* + * 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 <[email protected]> + */ + + +/* + * 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_RENDERABLE_TYPE, EGL_OPENGL_BIT, + 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) || + !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 */ |