Attachment 1097 Details for Bug 3132 – Модифицированный пример

Модифицированный пример

main.c (text/plain), 3.07 KB, created by Anton Rudnev on 2010-11-18 03:58:26 MSK

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Creator: Anton Rudnev

Created: 2010-11-18 03:58:26 MSK

Size: 3.07 KB

patch

obsolete

>/*
> * simplest - simple single buffered RGBA xlib program.
> */
>/* compile: cc -o simplest simplest.c -lGL -lX11 */
>
>#include <GL/glx.h>
>#include <X11/keysym.h>
>#include <stdlib.h>
>#include <stdio.h>
>
>static int attributeList[] = { GLX_RGBA, None };
>
>static void
>draw_scene(Display *dpy, Window win, GC gc) {
>    unsigned long theBlackPixel, theWhitePixel;
>
>    // gl
>    glClearColor(0.5, 0.5, 0.5, 1.0);
>    glClear(GL_COLOR_BUFFER_BIT);
>    glColor3f(1.0,0.0,0.0);
>    glRectf(-.5,-.5,.5,.5);
>    glColor3f(0.0,1.0,0.0);
>    glRectf(-.4,-.4,.4,.4);
>    glColor3f(0.0,0.0,1.0);
>    glRectf(-.3,-.3,.3,.3);
>
>    // X Line
>    theBlackPixel = WhitePixel(dpy, DefaultScreen(dpy));
>    theWhitePixel = BlackPixel(dpy, DefaultScreen(dpy));
>    XSetForeground(dpy, gc, theWhitePixel);
>    XSetBackground(dpy, gc, theBlackPixel);
>
>    XDrawLine(dpy, win, gc, 0, 0, 50, 60);
>
>    // flush
>    glFlush();
>}
>
>static void
>process_input(Display *dpy, Window win, GC gc) {
>    XEvent event;
>    Bool redraw = 0;
>
>    do {
>        char buf[31];
>        KeySym keysym;
>
>        XNextEvent(dpy, &event);
>        switch(event.type) {
>        case Expose:
>            redraw = 1;
>            break;
>        case ConfigureNotify:
>            glViewport(0, 0, event.xconfigure.width, 
>                    event.xconfigure.height);
>            redraw = 1;
>            break;
>        case KeyPress:
>            (void) XLookupString(&event.xkey, buf, sizeof(buf), 
>                    &keysym, NULL);
>            switch (keysym) {
>
>            case XK_Escape:
>                exit(EXIT_SUCCESS);
>            default:
>                break;
>            }
>        default:
>            break;
>        }
>    } while (XPending(dpy));
>    if (redraw) draw_scene(dpy, win, gc);
>}
>
>static void
>error(const char *prog, const char *msg) {
>    fprintf(stderr, "%s: %s\n", prog, msg);
>    exit(EXIT_FAILURE);
>}
>int
>main(int argc, char **argv) {
>    Display *dpy;
>    XVisualInfo *vi;
>    XSetWindowAttributes swa;
>    Window win;
>    GLXContext cx;
>
>    GC gc;
>
>    /* get a connection */
>    dpy = XOpenDisplay(0);
>    if (!dpy) error(argv[0], "can't open display");
>
>    /* get an appropriate visual */
>    vi = glXChooseVisual(dpy, DefaultScreen(dpy), attributeList);
>    if (!vi) error(argv[0], "no suitable visual");
>
>    /* create a GLX context */
>    cx = glXCreateContext(dpy, vi, 0, GL_TRUE);
>    /* create a colormap */
>    swa.colormap = XCreateColormap(dpy, RootWindow(dpy, vi->screen),
>                                   vi->visual, AllocNone);
>    /* create a window */
>    swa.border_pixel = 0;
>    swa.event_mask = ExposureMask | StructureNotifyMask | KeyPressMask;
>    win = XCreateWindow(dpy, RootWindow(dpy, vi->screen), 0, 0, 300, 
>                        300, 0, vi->depth, InputOutput, vi->visual,
>                        CWBorderPixel|CWColormap|CWEventMask, &swa);
>    XStoreName(dpy, win, "simplest");
>    XMapWindow(dpy, win);
>
>    /* connect the context to the window */
>    glXMakeCurrent(dpy, win, cx);
>
>    {
>        XGCValues gcvalues;
>        gc = XCreateGC(dpy, win, (unsigned long) 0, &gcvalues);
>    }
>
>    for(;;) process_input(dpy, win, gc);
>}

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Attachments on bug 3132: 1091 | 1097 | 1098