mirror of
https://github.com/urbit/shrub.git
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edd57d380d
- Fixes the IPC bug - Fixes the terminfo bug - Moves the OSX SDK out of our nixcrpkgs fork. - Vendor nixcrpkgs instead of having it be a submodule.
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
// Source: https://en.wikipedia.org/wiki/XCB#Example
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#include <xcb/xcb.h>
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#include <stdio.h>
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#include <stdlib.h>
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int main(void)
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{
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xcb_connection_t *c;
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xcb_screen_t *s;
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xcb_window_t w;
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xcb_gcontext_t g;
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xcb_generic_event_t *e;
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uint32_t mask;
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uint32_t values[2];
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int done = 0;
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xcb_rectangle_t r = { 20, 20, 60, 60 };
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/* open connection with the server */
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c = xcb_connect(NULL,NULL);
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if (xcb_connection_has_error(c)) {
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printf("Cannot open display\n");
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exit(1);
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}
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/* get the first screen */
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s = xcb_setup_roots_iterator( xcb_get_setup(c) ).data;
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/* create black graphics context */
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g = xcb_generate_id(c);
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w = s->root;
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mask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES;
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values[0] = s->black_pixel;
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values[1] = 0;
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xcb_create_gc(c, g, w, mask, values);
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/* create window */
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w = xcb_generate_id(c);
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mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
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values[0] = s->white_pixel;
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values[1] = XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_KEY_PRESS;
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xcb_create_window(c, s->root_depth, w, s->root,
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10, 10, 100, 100, 1,
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XCB_WINDOW_CLASS_INPUT_OUTPUT, s->root_visual,
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mask, values);
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/* map (show) the window */
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xcb_map_window(c, w);
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xcb_flush(c);
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/* event loop */
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while (!done && (e = xcb_wait_for_event(c))) {
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switch (e->response_type & ~0x80) {
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case XCB_EXPOSE: /* draw or redraw the window */
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xcb_poly_fill_rectangle(c, w, g, 1, &r);
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xcb_flush(c);
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break;
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case XCB_KEY_PRESS: /* exit on key press */
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done = 1;
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break;
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}
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free(e);
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}
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/* close connection to server */
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xcb_disconnect(c);
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return 0;
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}
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