Attachment 109809 Details for Bug 86531 – Example to demonstrate the problem

Example to demonstrate the problem

test-teardown.c (text/plain), 4.22 KB, created by Neil Roberts on 2014-11-21 17:33:46 UTC

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Creator: Neil Roberts

Created: 2014-11-21 17:33:46 UTC

Size: 4.22 KB

patch

obsolete

>#include <X11/Xlibint.h>
>#include <X11/Xmd.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <GL/glx.h>
>#include <GL/glxproto.h>
>
>struct data {
>        Display *dpy;
>        Window w;
>        GLXContext ctx;
>        GLXWindow glxw;
>};
>
>static Bool
>send_make_current_request(Display *dpy,
>                          GLXContextID gc_id,
>                          GLXDrawable glxwin)
>{
>        xGLXMakeCurrentReply reply;
>        xGLXMakeCurrentReq *req;
>        Bool ret;
>        XExtCodes *codes;
>
>        codes = XInitExtension(dpy, GLX_EXTENSION_NAME);
>
>        LockDisplay(dpy);
>
>        GetReq(GLXMakeCurrent, req);
>        req->reqType = codes->major_opcode;
>        req->glxCode = X_GLXMakeCurrent;
>        req->drawable = glxwin;
>        req->context = gc_id;
>        req->oldContextTag = 0;
>
>        ret = _XReply(dpy, (xReply *) & reply, 0, False);
>
>        UnlockDisplay(dpy);
>        SyncHandle();
>
>        return ret;
>}
>
>static GLXFBConfig
>choose_fb_config(struct data *data)
>{
>        GLXFBConfig *configs;
>        GLXFBConfig ret;
>        int n_configs;
>
>        static const int attrib_list[] = {
>                GLX_DOUBLEBUFFER, True,
>                GLX_RED_SIZE, 8,
>                GLX_GREEN_SIZE, 8,
>                GLX_BLUE_SIZE, 8,
>                0
>        };
>
>        configs = glXChooseFBConfig(data->dpy, DefaultScreen(data->dpy),
>                                    attrib_list, &n_configs);
>
>        if (configs == NULL)
>                return NULL;
>
>        if (n_configs < 1)
>                ret = NULL;
>        else
>                ret = configs[0];
>
>        XFree(configs);
>
>        return ret;
>}
>
>/* Hack so we can extract the xid from a GLXContext */
>struct dummy_context {
>        void *four_pointers[4];
>        int an_int;
>        void *a_pointer;
>        XID xid;
>};
>
>static Window
>make_window(struct data *data,
>            unsigned int width,
>            unsigned int height)
>{
>        int scrnum = 0;
>        XSetWindowAttributes attr;
>        unsigned long mask;
>        Window root;
>        Window win;
>        GLXFBConfig fb_config;
>        XVisualInfo *visinfo, visual_template;
>        GLXContextID context_id;
>        int visid, n_items;
>
>        root = RootWindow(data->dpy, scrnum);
>
>        fb_config = choose_fb_config(data);
>
>        if (fb_config == NULL) {
>                printf ("Error: couldn't get an RGB, "
>                        "double-buffered FB config\n");
>                return None;
>        }
>
>        glXGetFBConfigAttrib(data->dpy, fb_config, GLX_VISUAL_ID, &visid);
>        visual_template.visualid = visid;
>        visinfo = XGetVisualInfo(data->dpy,
>                                 VisualIDMask,
>                                 &visual_template,
>                                 &n_items);
>
>        if (visinfo == NULL || n_items < 1) {
>                printf("Couldn't get visual for FB config\n");
>                exit(1);
>        }
>
>        data->ctx = glXCreateContext(data->dpy, visinfo, NULL, True);
>
>        if (data->ctx == NULL) {
>                printf("Error: glXCreateContext failed\n");
>                exit(1);
>        }
>
>        /* window attributes */
>        attr.background_pixel = 0;
>        attr.border_pixel = 0;
>        attr.colormap =
>                XCreateColormap(data->dpy, root, visinfo->visual, AllocNone);
>        attr.event_mask =
>                StructureNotifyMask | ExposureMask | PointerMotionMask |
>                KeyPressMask;
>        mask = CWBorderPixel | CWColormap | CWEventMask;
>
>        win = XCreateWindow(data->dpy, root, 0, 0, width, height,
>                            0, visinfo->depth, InputOutput,
>                            visinfo->visual, mask, &attr);
>
>        data->glxw = glXCreateWindow(data->dpy, fb_config, win, NULL);
>
>        /* Hack to get the GC id out of Mesa's GLXContext pointer */
>        context_id = ((struct dummy_context *) data->ctx)->xid;
>
>        send_make_current_request(data->dpy, context_id, data->glxw);
>
>        return win;
>}
>
>int
>main(int argc, char *argv[])
>{
>        struct data data;
>
>        data.dpy = XOpenDisplay(NULL);
>
>        if (!data.dpy) {
>                printf("Error: XOpenDisplay failed\n");
>                return 1;
>        }
>
>        data.w = make_window(&data, 640, 480);
>
>        if (data.w == None)
>                return 1;
>
>        return 0;
>}

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Attachments on bug 86531: 109809 | 109810

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