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-rw-r--r--progs/xdemos/manywin.c393
1 files changed, 393 insertions, 0 deletions
diff --git a/progs/xdemos/manywin.c b/progs/xdemos/manywin.c
new file mode 100644
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+++ b/progs/xdemos/manywin.c
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+/*
+ * Create N GLX windows/contexts and render to them in round-robin order.
+ * Also, have the contexts share all texture objects.
+ * Press 'd' to delete a texture, 'u' to unbind it.
+ *
+ * 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 <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <X11/keysym.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 200
+static struct head Heads[MAX_HEADS];
+static int NumHeads = 0;
+static GLboolean SwapSeparate = GL_TRUE;
+static GLuint TexObj = 0;
+
+
+static void
+Error(const char *display, const char *msg)
+{
+ fprintf(stderr, "Error on display %s - %s\n", display, msg);
+ exit(1);
+}
+
+
+static struct head *
+AddHead(const char *displayName, const char *name)
+{
+ 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 = 90, height = 90;
+ int xpos = 0, ypos = 0;
+
+ 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 */
+ xpos = (NumHeads % 10) * 100;
+ ypos = (NumHeads / 10) * 100;
+ printf("%d, %d\n", xpos, ypos);
+ 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, xpos, ypos, 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, name, name,
+ None, (char **)NULL, 0, &sizehints);
+ }
+
+ if (NumHeads == 0) {
+ ctx = glXCreateContext(dpy, visinfo, NULL, True);
+ }
+ else {
+ /* share textures & dlists with 0th context */
+ printf("sharing\n");
+ ctx = glXCreateContext(dpy, visinfo, Heads[0].Context, 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;
+ }
+
+ if (NumHeads == 0) {
+ /* create texture object now */
+ static const GLubyte checker[2][2][4] = {
+ { {255, 255, 255, 255}, { 0, 0, 0, 255} },
+ { { 0, 0, 0, 0}, {255, 255, 255, 255} }
+ };
+ glGenTextures(1, &TexObj);
+ assert(TexObj);
+ glBindTexture(GL_TEXTURE_2D, TexObj);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGB,
+ GL_UNSIGNED_BYTE, checker);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ }
+ else {
+ /* bind 0th context's texture in this context too */
+ assert(TexObj);
+ glBindTexture(GL_TEXTURE_2D, TexObj);
+ }
+ glEnable(GL_TEXTURE_2D);
+
+ /* save the info for this head */
+ {
+ struct head *h = &Heads[NumHeads];
+ strcpy(h->DisplayName, name);
+ 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
+DestroyHeads(void)
+{
+ int i;
+ for (i = 0; i < NumHeads; i++) {
+ XDestroyWindow(Heads[i].Dpy, Heads[i].Win);
+ glXDestroyContext(Heads[i].Dpy, Heads[i].Context);
+ XCloseDisplay(Heads[i].Dpy);
+ }
+}
+
+
+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);
+ glTexCoord2f(0.5, 1.0); glVertex2f(0, 0.8);
+ glTexCoord2f(0.0, 0.0); glVertex2f(-0.8, -0.7);
+ glTexCoord2f(1.0, 0.0); glVertex2f(0.8, -0.7);
+ glEnd();
+ glPopMatrix();
+
+ if (!SwapSeparate)
+ glXSwapBuffers(h->Dpy, h->Win);
+}
+
+
+static void
+Swap(struct head *h)
+{
+ 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);
+ if (SwapSeparate)
+ Swap(h);
+ break;
+ case ConfigureNotify:
+ Resize(h, event.xconfigure.width, event.xconfigure.height);
+ break;
+ case KeyPress:
+ {
+ char buf[100];
+ KeySym keySym;
+ XComposeStatus stat;
+ XLookupString(&event.xkey, buf, sizeof(buf), &keySym, &stat);
+ switch (keySym) {
+ case XK_Escape:
+ exit(0);
+ break;
+ case XK_d:
+ case XK_D:
+ printf("Delete Texture in window %d\n", i);
+ glXMakeCurrent(h->Dpy, h->Win, h->Context);
+ glDeleteTextures(1, &TexObj);
+ break;
+ case XK_u:
+ case XK_U:
+ printf("Unbind Texture in window %d\n", i);
+ glXMakeCurrent(h->Dpy, h->Win, h->Context);
+ glBindTexture(GL_TEXTURE_2D, 0);
+ break;
+ }
+ }
+ break;
+ default:
+ /*no-op*/ ;
+ }
+ }
+ else {
+ printf("window mismatch\n");
+ }
+ }
+ }
+
+ /* redraw all windows */
+ for (i = 0; i < NumHeads; i++) {
+ Redraw(&Heads[i]);
+ }
+ /* swapbuffers on all windows, if not already done */
+ if (SwapSeparate) {
+ for (i = 0; i < NumHeads; i++) {
+ Swap(&Heads[i]);
+ }
+ }
+ 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[])
+{
+ char *dpyName = NULL;
+ int i;
+
+ if (argc == 1) {
+ printf("manywin: open N simultaneous glx windows\n");
+ printf("Usage:\n");
+ printf(" manywin [-s] numWindows\n");
+ printf("Options:\n");
+ printf(" -s = swap immediately after drawing (see src code)\n");
+ printf("Example:\n");
+ printf(" manywin 10\n");
+ return 0;
+ }
+ else {
+ int n = 3;
+ for (i = 1; i < argc; i++) {
+ if (strcmp(argv[i], "-s") == 0) {
+ SwapSeparate = GL_FALSE;
+ }
+ else if (strcmp(argv[i], "-display") == 0 && i < argc) {
+ dpyName = argv[i+1];
+ i++;
+ }
+ else {
+ n = atoi(argv[i]);
+ }
+ }
+ if (n < 1)
+ n = 1;
+
+ printf("%d windows\n", n);
+ for (i = 0; i < n; i++) {
+ char name[100];
+ struct head *h;
+ sprintf(name, "%d", i);
+ h = AddHead(dpyName, name);
+ if (h) {
+ PrintInfo(h);
+ }
+ }
+ }
+
+ EventLoop();
+ DestroyHeads();
+ return 0;
+}
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