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#include <stdlib.h>
#include <stdio.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <xcb/xcb.h>
#include <xcb/shm.h>
#include "xcb_aux.h"
#include "xcb_image.h"
#define W_W 40
#define W_H 40
int
main (int argc, char *argv[])
{
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;
/* 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");
xcb_image_t *img = 0;
xcb_shm_query_version_reply_t *rep;
xcb_shm_segment_info_t shminfo;
rep = xcb_shm_query_version_reply (c,
xcb_shm_query_version (c),
NULL);
if (rep)
{
uint8_t format;
if (rep->shared_pixmaps &&
(rep->major_version > 1 || rep->minor_version > 0))
format = rep->pixmap_format;
else
format = 0;
img = xcb_image_shm_create (c, depth, format, NULL, W_W, W_H);
printf ("Create image summary:\n");
printf (" * format..........: %d\n", img->format);
printf (" * byte order......: %d\n", img->image_byte_order);
printf (" * bitmap unit.....: %d\n", img->bitmap_format_scanline_unit);
printf (" * bitmap order....: %d\n", img->bitmap_format_bit_order);
printf (" * bitmap pad......: %d\n", img->bitmap_format_scanline_pad);
shminfo.shmid = shmget (IPC_PRIVATE,
img->bytes_per_line*img->height,
IPC_CREAT|0777);
shminfo.shmaddr = shmat(shminfo.shmid, 0, 0);
img->data = shminfo.shmaddr;
shminfo.shmseg = xcb_generate_id (c);
xcb_shm_attach(c, shminfo.shmseg,
shminfo.shmid, 0);
shmctl(shminfo.shmid, IPC_RMID, 0);
}
if (!img)
{
printf ("Can't use shm...\n");
exit (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);
/* points[0].x = 10; */
/* points[0].y = 10; */
/* points[1].x = 10; */
/* points[1].y = 40; */
/* 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);
}
return 1;
}
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