Attachment 141084 Details for Bug 107545 – simple.c

simple.c

simple.c (text/plain), 1.99 KB, created by Julien Isorce on 2018-08-14 16:52:26 UTC

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Creator: Julien Isorce

Created: 2018-08-14 16:52:26 UTC

Size: 1.99 KB

patch

obsolete

>#include <stdio.h>
>#include <X11/Xlib.h>
>#include <GL/glx.h>
>
>/* build: gcc -Wall simple.c -o simple $(pkg-config --cflags --libs gl x11)
>   run: for i in {0..300}; do (./simple &); done
>*/
>
>int main(int argc, char *argv[])
>{
>   int width = 128;
>   int height = 128;
>   int glAttribs[] = {
>      GLX_RGBA,
>      GLX_DEPTH_SIZE, 1,
>      None
>   };
>   Display *dpy;
>   XVisualInfo *visInfo;
>   int scrn;
>   Window root;
>   Window win;
>   XSetWindowAttributes winAttribs;
>   unsigned long winAttribsMask;
>   GLXContext glCtx;
>
>   dpy = XOpenDisplay(NULL);
>   if (!dpy) {
>      fprintf(stderr, "Couldn't open default display\n");
>      return 1;
>   }
>
>   scrn = DefaultScreen(dpy);
>
>   root = RootWindow(dpy, scrn);
>
>   visInfo = glXChooseVisual(dpy, scrn, glAttribs);
>   if (!visInfo) {
>      fprintf(stderr, "Failed to select visual\n");
>      return 1;
>   }
>
>   glCtx = glXCreateContext(dpy, visInfo, 0, True);
>   if (!glCtx) {
>      fprintf(stderr, "Couldn't create GL context\n");
>      return 1;
>   }
>
>   winAttribs.border_pixel = 0;
>   winAttribs.colormap = XCreateColormap(dpy, root, visInfo->visual, AllocNone);
>   winAttribs.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
>   winAttribsMask = CWBorderPixel | CWColormap | CWEventMask;
>   win = XCreateWindow(dpy, root, 0, 0, width, height, 0,
>                       visInfo->depth, InputOutput,
>                       visInfo->visual,
>                       winAttribsMask, &winAttribs);
>
>   XMapWindow(dpy, win);
>
>   glXMakeCurrent(dpy, win, glCtx);
>
>   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
>
>   glViewport(0, 0, width, height);
>   glMatrixMode(GL_PROJECTION);
>   glLoadIdentity();
>
>   while (1) {
>      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>   
>      glColor3f(1.0, 1.0, 1.0);
>      glBegin(GL_LINE);
>      glVertex2f(-1.0, -1.0);
>      glVertex2f( 1.0, -1.0);
>      glVertex2f(1.0, 1.0);
>      glVertex2f(-1.0, 1.0);
>      glEnd();
>   
>      glFlush();
>      //same result with glXSwapBuffers(dpy, win);
>   }
>
>   return 0;
>}

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Attachments on bug 107545: 141084 | 141202 | 141203 | 141204 | 141263 | 141264

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