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Window creation/X11: Difference between revisions
→{{header|C}}: added xcb
m (use the Requires template) |
(→{{header|C}}: added xcb) |
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=={{header|C}}==▼
▲=={{header|C}}==
=== Xlib ===
{{libheader|Xlib}}
Line 63 ⟶ 64:
XCloseDisplay(d);
return 0;
}</lang>
=== XCB ===
{{libheader|XCB}}
Compile with:
* gcc -o helloxcb -lxcb helloxcb.c
<lang c>#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <xcb/xcb.h>
int main ()
{
xcb_connection_t *c;
xcb_screen_t *screen;
xcb_drawable_t win;
xcb_gcontext_t foreground;
xcb_gcontext_t background;
xcb_generic_event_t *e;
uint32_t mask = 0;
uint32_t values[2];
char string[] = "Hello, XCB!";
uint8_t string_len = strlen(string);
xcb_rectangle_t rectangles[] = {
{40, 40, 20, 20},
};
c = xcb_connect (NULL, NULL);
/* get the first screen */
screen = xcb_setup_roots_iterator (xcb_get_setup (c)).data;
/* root window */
win = screen->root;
/* create black (foreground) graphic context */
foreground = xcb_generate_id (c);
mask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES;
values[0] = screen->black_pixel;
values[1] = 0;
xcb_create_gc (c, foreground, win, mask, values);
/* create white (background) graphic context */
background = xcb_generate_id (c);
mask = XCB_GC_BACKGROUND | XCB_GC_GRAPHICS_EXPOSURES;
values[0] = screen->white_pixel;
values[1] = 0;
xcb_create_gc (c, background, win, mask, values);
/* create the window */
win = xcb_generate_id(c);
mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
values[0] = screen->white_pixel;
values[1] = XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_KEY_PRESS;
xcb_create_window (c, /* connection */
XCB_COPY_FROM_PARENT, /* depth */
win, /* window Id */
screen->root, /* parent window */
0, 0, /* x, y */
150, 150, /* width, height */
10, /* border_width */
XCB_WINDOW_CLASS_INPUT_OUTPUT, /* class */
screen->root_visual, /* visual */
mask, values); /* masks */
/* map the window on the screen */
xcb_map_window (c, win);
xcb_flush (c);
while ((e = xcb_wait_for_event (c))) {
switch (e->response_type & ~0x80) {
case XCB_EXPOSE:
xcb_poly_rectangle (c, win, foreground, 1, rectangles);
xcb_image_text_8 (c, string_len, win, background, 20, 20, string);
//xcb_poly_text_8 (c, win, foreground, 20, 20, string_len, string);
xcb_flush (c);
break;
case XCB_KEY_PRESS:
goto endloop;
}
free (e);
}
endloop:
return 0;
}</lang>
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