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| -rw-r--r-- | progs/tests/jkrahntest.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/progs/tests/jkrahntest.c b/progs/tests/jkrahntest.c new file mode 100644 index 0000000000..520dbb84e7 --- /dev/null +++ b/progs/tests/jkrahntest.c @@ -0,0 +1,177 @@ +/* $Id: jkrahntest.c,v 1.1 2002/06/16 03:57:48 brianp Exp $ */ + +/* This is a good test for glXSwapBuffers on non-current windows, + * and the glXCopyContext function. Fixed several Mesa/DRI bugs with + * this program on 15 June 2002. + * + * Joe's comments follow: + * + * I have tried some different approaches for being able to + * draw to multiple windows using one context, or a copied + * context. Mesa/indirect rendering works to use one context + * for multiple windows, but crashes with glXCopyContext. + * DRI is badly broken, at least for ATI. + * + * I also noticed that glXMakeCurrent allows a window and context + * from different visuals to be attached (haven't tested recently). + * + * Joe Krahn <jkrahn@nc.rr.com> + */ + +#include <GL/glx.h> +#include <GL/gl.h> +#include <string.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <math.h> +#define M_PI 3.14159 +#define DEGTOR (M_PI/180.0) + +static int AttributeList[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None }; + +int main(int argc, char **argv) +{ + Window win1, win2; + XVisualInfo *vi; + XSetWindowAttributes swa; + Display *dpy; + GLXContext ctx1, ctx2; + float angle; + int test; + + if (argc < 2) { + fprintf(stderr, "This program tests GLX context switching.\n"); + fprintf(stderr, "Usage: cxbug <n>\n"); + fprintf(stderr, "Where n is:\n"); + fprintf(stderr, "\t1) Use two contexts and swap only when the context is current (typical case).\n"); + fprintf(stderr, "\t2) Use two contexts and swap at the same time.\n"); + fprintf(stderr, "\t\t Used to crash Mesa & nVidia, and DRI artifacts. Seems OK now.\n"); + fprintf(stderr, "\t3) Use one context, but only swap when a context is current.\n"); + fprintf(stderr, "\t\t Serious artifacts for DRI at least with ATI.\n"); + fprintf(stderr, "\t4) Use one context, swap both windows at the same time, so the left\n"); + fprintf(stderr, "\t\t window has no context at swap time. Severe artifacts for DRI.\n"); + fprintf(stderr, "\t5) Use two contexts, copying one to the other when switching windows.\n"); + fprintf(stderr, "\t\t DRI gives an error, indirect rendering crashes server.\n"); + + exit(1); + } + test = atoi(argv[1]); + + /* get a connection */ + dpy = XOpenDisplay(NULL); + + /* Get an appropriate visual */ + vi = glXChooseVisual(dpy, DefaultScreen(dpy), AttributeList); + if (vi == 0) { + fprintf(stderr, "No matching visuals found.\n"); + exit(-1); + } + + /* Create two GLX contexts, with list sharing */ + ctx1 = glXCreateContext(dpy, vi, 0, True); + ctx2 = glXCreateContext(dpy, vi, ctx1, True); + + /* create a colormap */ + swa.colormap = XCreateColormap(dpy, RootWindow(dpy, vi->screen), + vi->visual, AllocNone); + swa.border_pixel = 0; + + /* Create two windows */ + win1 = XCreateWindow(dpy, RootWindow(dpy, vi->screen), + 10, 10, 200, 200, + 0, vi->depth, InputOutput, vi->visual, + CWBorderPixel | CWColormap, &swa); + XStoreName(dpy, win1, "Test [L]"); + XMapWindow(dpy, win1); + XMoveWindow(dpy, win1, 10, 10); /* Initial requested x,y may not be honored */ + { + XSizeHints sizehints; + static const char *name = "window"; + sizehints.x = 10; + sizehints.y = 10; + sizehints.width = 200; + sizehints.height = 200; + sizehints.flags = USSize | USPosition; + XSetNormalHints(dpy, win1, &sizehints); + XSetStandardProperties(dpy, win1, name, name, + None, (char **)NULL, 0, &sizehints); + } + + + win2 = XCreateWindow(dpy, RootWindow(dpy, vi->screen), + 250, 10, 200, 200, + 0, vi->depth, InputOutput, vi->visual, + CWBorderPixel | CWColormap, &swa); + XStoreName(dpy, win1, "Test [R]"); + XMapWindow(dpy, win2); + XMoveWindow(dpy, win2, 260, 10); + { + XSizeHints sizehints; + static const char *name = "window"; + sizehints.x = 10; + sizehints.y = 10; + sizehints.width = 200; + sizehints.height = 200; + sizehints.flags = USSize | USPosition; + XSetNormalHints(dpy, win2, &sizehints); + XSetStandardProperties(dpy, win2, name, name, + None, (char **)NULL, 0, &sizehints); + } + + + /* Now draw some spinning things */ + for (angle = 0; angle < 360*4; angle += 10.0) { + /* Connect the context to window 1 */ + glXMakeCurrent(dpy, win1, ctx1); + + /* Clear and draw in window 1 */ + glDrawBuffer(GL_BACK); + glClearColor(1, 1, 0, 1); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + glColor3f(1, 0, 0); + glBegin(GL_TRIANGLES); + glVertex2f(0, 0); + glVertex2f(cos(angle * DEGTOR), sin(angle * DEGTOR)); + glVertex2f(cos((angle + 20.0) * DEGTOR), + sin((angle + 20.0) * DEGTOR)); + glEnd(); + glFlush(); + + if (test == 1 || test == 3 || test == 5) + glXSwapBuffers(dpy, win1); + + if (test == 5) + glXCopyContext(dpy, ctx1, ctx2, GL_ALL_ATTRIB_BITS); + /* Connect the context to window 2 */ + if (test == 3 || test == 4) { + glXMakeCurrent(dpy, win2, ctx1); + } else { + glXMakeCurrent(dpy, win2, ctx2); + } + + /* Clear and draw in window 2 */ + glDrawBuffer(GL_BACK); + glClearColor(0, 0, 1, 1); + glClear(GL_COLOR_BUFFER_BIT); + glColor3f(1, 1, 0); + glBegin(GL_TRIANGLES); + glVertex2f(0, 0); + glVertex2f(cos(angle * DEGTOR), sin(angle * DEGTOR)); + glVertex2f(cos((angle + 20.0) * DEGTOR), + sin((angle + 20.0) * DEGTOR)); + glEnd(); + glFlush(); + + /* Swap buffers */ + if (test == 2 || test == 4) + glXSwapBuffers(dpy, win1); + glXSwapBuffers(dpy, win2); + + /* wait a while */ + glXWaitX(); + usleep(20000); + } + + return 0; +} |