Attachment 115992 Details for Bug 90512 – xcb_shm_attach_fd example

xcb_shm_attach_fd example

xcb_shm_attach_fd.c (text/plain), 6.31 KB, created by wbrana on 2015-05-23 13:49:43 UTC

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Creator: wbrana

Created: 2015-05-23 13:49:43 UTC

Size: 6.31 KB

patch

obsolete

>ï»¿/*
> * Copyright Â© 2007 Bart Massey <bart@cs.pdx.edu>
> *
> * Permission is hereby granted, free of charge, to any person obtaining a
> * copy of this software and associated documentation files (the "Software"),
> * to deal in the Software without restriction, including without limitation
> * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> * and/or sell copies of the Software, and to permit persons to whom the
> * Software is furnished to do so, subject to the following conditions:
> *
> * The above copyright notice and this permission notice shall be included in
> * all copies or substantial portions of the Software.
> *
> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
> * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
> * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
> * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
> *
> * Except as contained in this notice, the names of the authors or their
> * institutions shall not be used in advertising or otherwise to promote the
> * sale, use or other dealings in this Software without prior written
> * authorization from the authors.
> */
>
>#ifdef HAVE_CONFIG_H
>#include "config.h"
>#endif
>
>#include <stdlib.h>
>#include <stdio.h>
>
>#include <sys/ipc.h>
>#include <sys/shm.h>
>
>#include <xcb/xcb.h>
>#include <xcb/shm.h>
>
>#include <xcb/xcb_aux.h>
>#include <xcb/xcb_image.h>
>
>#define W_W 40
>#define W_H 40
>
>#include <sys/mman.h>
>#include <unistd.h>
>
>int
>main (int argc, char *argv[])
>{
>    char template[] = "/tmp/shm-XXXXXX";
>    int fd;
>    fd = mkstemp(template);
>    unlink(template);
>
>  xcb_connection_t   *c;
>  xcb_screen_t       *screen;
>  xcb_drawable_t      win;
>  xcb_drawable_t      rect;
>  xcb_rectangle_t     rect_coord = { 0, 0, W_W, W_H};
>  xcb_gcontext_t      bgcolor, fgcolor;
>  xcb_point_t         points[2];
>  uint32_t           mask;
>  uint32_t           valgc[2];
>  uint32_t           valwin[3];
>  int              depth;
>  int              screen_nbr;
>  xcb_generic_event_t *e;
>  uint8_t format;
>  xcb_image_t *img;
>  xcb_shm_query_version_reply_t *rep;
>  xcb_shm_segment_info_t shminfo;
>
>  /* Open the connexion to the X server and get the first screen */
>  c = xcb_connect (NULL, &screen_nbr);
>  screen = xcb_aux_get_screen (c, screen_nbr);
>  depth = xcb_aux_get_depth (c, screen);
>
>  /* Create a black graphic context for drawing in the foreground */
>  win = screen->root;
>
>  fgcolor = xcb_generate_id(c);
>  mask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES;
>  valgc[0] = screen->black_pixel;
>  valgc[1] = 0; /* no graphics exposures */
>  xcb_create_gc(c, fgcolor, win, mask, valgc);
>
>  bgcolor = xcb_generate_id(c);
>  mask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES;
>  valgc[0] = screen->white_pixel;
>  valgc[1] = 0; /* no graphics exposures */
>  xcb_create_gc(c, bgcolor, win, mask, valgc);
>
>  /* Shm test */
>  printf ("shm test begin\n");
>  rep = xcb_shm_query_version_reply (c,
>                 xcb_shm_query_version (c),
>                 NULL);
>  if (!rep || !rep->shared_pixmaps ||
>      rep->major_version < 1 ||
>      (rep->major_version == 1 && rep->minor_version == 0))
>      {
>      printf ("No or insufficient shm support...\n");
>      exit (0);
>      }
>  format = rep->pixmap_format;
>  img = xcb_image_create_native (c, W_W, W_H, format, depth,
>                     0, ~0, 0);
>
>  if (!img)
>      {
>      printf ("Can't create image...\n");
>      exit (0);
>      }
>
>  printf ("Create image summary:\n");
>  printf (" * format..........: %d\n", img->format);
>  printf (" * byte order......: %d\n", img->byte_order);
>  printf (" * bitmap unit.....: %d\n", img->bpp);
>  printf (" * bitmap order....: %d\n", img->bit_order);
>  printf (" * bitmap pad......: %d\n", img->scanline_pad);
>
>  shminfo.shmid = fd;// shmget (IPC_PRIVATE, img->size, IPC_CREAT|0777);
>  ftruncate(fd, img->size);
>  shminfo.shmaddr =  mmap(NULL, img->size, PROT_READ|PROT_WRITE,MAP_SHARED,fd, 0);//shmat(shminfo.shmid, 0, 0);
>  if (shminfo.shmaddr == ((char *) -1)) {
>      close(fd);
>      printf("mmap failed\n");
>      return 1;
>  }
>
>
>  img->data = shminfo.shmaddr;
>
>  shminfo.shmseg = xcb_generate_id (c);
>  xcb_shm_attach_fd(c, shminfo.shmseg, shminfo.shmid, 0);
>  //shmctl(shminfo.shmid, IPC_RMID, 0);
>
>  /* Draw in the image */
>  printf ("put the pixel\n");
>  xcb_image_put_pixel (img, 20, 20, 65535);
>  printf ("fin put pixel\n");
>
>  /* Ask for our window's Id */
>  win = xcb_generate_id(c);
>
>  /* Create the window */
>  mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK | XCB_CW_DONT_PROPAGATE;
>  valwin[0] = screen->white_pixel;
>  valwin[1] = XCB_EVENT_MASK_KEY_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_EXPOSURE;
>  valwin[2] = XCB_EVENT_MASK_BUTTON_PRESS;
>  xcb_create_window (c,                        /* Connection          */
>           0,                        /* depth               */
>           win,                      /* window Id           */
>           screen->root,             /* parent window       */
>           0, 0,                     /* x, y                */
>           W_W, W_H,                 /* width, height       */
>           10,                       /* border_width        */
>           XCB_WINDOW_CLASS_INPUT_OUTPUT,/* class               */
>           screen->root_visual,      /* visual              */
>           mask, valwin);            /* masks, not used yet */
>
>  /* Map the window on the screen */
>  xcb_map_window (c, win);
>
>  /* Create a Pixmap that will fill the window */
>  rect = xcb_generate_id (c);
>  xcb_create_pixmap(c, depth, rect, win, W_W, W_H);
>  xcb_poly_fill_rectangle(c, rect, bgcolor, 1, &rect_coord);
>  points[0].x = 0;
>  points[0].y = 0;
>  points[1].x = 1;
>  points[1].y = 1;
>  xcb_poly_line(c, XCB_COORD_MODE_ORIGIN, rect, fgcolor, 2, points);
>
>  xcb_flush (c);
>
>  while ((e = xcb_wait_for_event(c)))
>    {
>      switch (e->response_type)
>    {
>    case XCB_EXPOSE:
>      {
>        xcb_copy_area(c, rect, win, bgcolor,
>            0, 0, 0, 0, W_W, W_H);
>        printf ("put image\n");
>        xcb_image_shm_put (c, win, fgcolor,
>                   img, shminfo,
>                   0, 0, 0, 0, W_W,W_H,
>                   0);
>        xcb_flush (c);
>        break;
>      }
>    }
>      free (e);
>    }
>  munmap(shminfo.shmaddr, img->size);
>  return 1;
>}

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