diff options
Diffstat (limited to 'progs/samples/oglinfo.c')
| -rw-r--r-- | progs/samples/oglinfo.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/progs/samples/oglinfo.c b/progs/samples/oglinfo.c new file mode 100644 index 0000000000..4fe51efb3c --- /dev/null +++ b/progs/samples/oglinfo.c @@ -0,0 +1,218 @@ +/* oglinfo.c */ + +/* This demo modified by BrianP to accomodate Mesa and test + * the GLX 1.1 functions. + */ + + + +#include <GL/gl.h> +#include <GL/glx.h> +#include <GL/glu.h> +#include <stdio.h> +#include <string.h> + +int visual_request0[] = { None }; /* don't need much of a visual */ +int visual_request1[] = { GLX_RGBA, None }; /* in case CI failed */ + +int main(int argc, char **argv) +{ + char *display_name = NULL; + char *string; + Display *dpy; + int screen_num; + int major, minor; + XVisualInfo *vis; + GLXContext ctx; + Window root, win; + Colormap cmap; + XSetWindowAttributes swa; + int dontcare; + + /* parse arguments */ + if(argc > 1) { + if(!strcmp(argv[1],"-display")) + display_name = argv[2]; + else { + fprintf(stderr, "Usage: %s [-display <display>]\n",argv[0]); + return 0; + } + } + + /* get display */ + if (!(dpy = XOpenDisplay(display_name))) { + fprintf(stderr,"Error: XOpenDisplay() failed.\n"); + return 1; + } + + /* does the server know about OpenGL & GLX? */ +#ifndef MESA + if(!XQueryExtension(dpy, "GLX", &dontcare, &dontcare, &dontcare)) { + fprintf(stderr,"This system doesn't appear to support OpenGL\n"); + return 1; + } +#else + (void) dontcare; +#endif + + /* find the glx version */ + if(glXQueryVersion(dpy, &major, &minor)) + printf("GLX Version: %d.%d\n", major, minor); + else { + fprintf(stderr, "Error: glXQueryVersion() failed.\n"); + return 1; + } + + /* get screen number */ + screen_num = DefaultScreen(dpy); + +/* This #ifdef isn't redundant. It keeps the build from breaking +** if you are building on a machine that has an old (1.0) version +** of glx. +** +** This program could still be *run* on a machine that has an old +** version of glx, even if it was *compiled* on a version that has +** a new version. +** +** If compiled on a system with an old version of glx, then it will +** never recognize glx extensions, since that code would have been +** #ifdef'ed out. +*/ +#ifdef GLX_VERSION_1_1 + + /* + ** This test guarantees that glx, on the display you are inquiring, + ** suppports glXQueryExtensionsString(). + */ + if(minor > 0 || major > 1) + string = (char *) glXQueryExtensionsString(dpy, screen_num); + else + string = ""; + + if(string) + printf("GLX Extensions (client & server): %s\n", + string); + else { + fprintf(stderr, "Error: glXQueryExtensionsString() failed.\n"); + return 1; + } + + if (minor>0 || major>1) { + printf("glXGetClientString(GLX_VENDOR): %s\n", glXGetClientString(dpy,GLX_VENDOR)); + printf("glXGetClientString(GLX_VERSION): %s\n", glXGetClientString(dpy,GLX_VERSION)); + printf("glXGetClientString(GLX_EXTENSIONS): %s\n", glXGetClientString(dpy,GLX_EXTENSIONS)); + printf("glXQueryServerString(GLX_VENDOR): %s\n", glXQueryServerString(dpy,screen_num,GLX_VENDOR)); + printf("glXQueryServerString(GLX_VERSION): %s\n", glXQueryServerString(dpy,screen_num,GLX_VERSION)); + printf("glXQueryServerString(GLX_EXTENSIONS): %s\n", glXQueryServerString(dpy,screen_num,GLX_EXTENSIONS)); + } + + +#endif + + /* get any valid OpenGL visual */ + if (!(vis = glXChooseVisual(dpy, screen_num, visual_request0))) { + if (!(vis = glXChooseVisual(dpy, screen_num, visual_request1))) { + fprintf(stderr,"Error: glXChooseVisual() failed.\n"); + return 1; + } + } + + /* get context */ + ctx = glXCreateContext(dpy,vis,0,GL_TRUE); + + /* root window */ + root = RootWindow(dpy,vis->screen); + + /* get RGBA colormap */ + cmap = XCreateColormap(dpy, root, vis->visual, AllocNone); + + /* get window */ + swa.colormap = cmap; + swa.border_pixel = 0; + swa.event_mask = StructureNotifyMask; + win = XCreateWindow(dpy, root, 0, 0, 1, 1, 0, vis->depth, + InputOutput,vis->visual, + CWBorderPixel|CWColormap|CWEventMask, + &swa); + + glXMakeCurrent(dpy,win,ctx); + + string = (char *) glGetString(GL_VERSION); + if(string) +#ifdef MESA + printf("Mesa Version: %s\n", string); +#else + printf("OpenGL Version: %s\n", string); +#endif + else { + fprintf(stderr, "Error: glGetString(GL_VERSION) failed.\n"); + return 1; + } + + string = (char *) glGetString(GL_EXTENSIONS); + + if(string) +#ifdef MESA + printf("Mesa Extensions: %s\n", string); +#else + printf("OpenGL Extensions: %s\n", string); +#endif + else { + fprintf(stderr, "Error: glGetString(GL_EXTENSIONS) failed.\n"); + return 1; + } + + string = (char *) glGetString(GL_RENDERER); + + if(string) +#ifdef MESA + printf("Mesa Renderer: %s\n", string); +#else + printf("OpenGL renderer: %s\n", string); +#endif + else { + fprintf(stderr, "Error: glGetString(GL_RENDERER) failed.\n"); + return 1; + } + +/* +** This #ifdef prevents a build failure if you compile on an a +** machine with an old GLU library. +** +** If you build on a pre GLU 1.1 machine, you will never be able +** to get glu info, even if you run on a GLU 1.1 or latter machine, +** since the code has been #ifdef'ed out. +*/ +#ifdef GLU_VERSION_1_1 + + /* + ** If the glx version is 1.1 or latter, gluGetString() is guaranteed + ** to exist. + */ + if(minor > 0 || major > 1) + string = (char *) gluGetString(GLU_VERSION); + else + string = "1.0"; + + if(string) + printf("GLU Version: %s\n", string); + else { + fprintf(stderr, "Error: gluGetString(GLU_VERSION) failed.\n"); + return 1; + } + + if(minor > 0 || major > 1) + string = (char *) gluGetString(GLU_EXTENSIONS); + else + string = ""; + + if(string) + printf("GLU Extensions: %s\n", string); + else { + fprintf(stderr, "Error: gluGetString(GLU_EXTENSIONS) failed.\n"); + return 1; + } + +#endif + return 0; +} |