From 88be7c1ea7b8a0eb1909b3ad43ebb8c0ee37a052 Mon Sep 17 00:00:00 2001
From: ben <ben.nagy@arachnida.blog>
Date: Tue, 8 Oct 2024 16:20:36 -0700
Subject: Connection to X, GC and window creation

---
 src/scapx.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 src/scapx.c

(limited to 'src/scapx.c')

diff --git a/src/scapx.c b/src/scapx.c
new file mode 100644
index 0000000..09b597e
--- /dev/null
+++ b/src/scapx.c
@@ -0,0 +1,89 @@
+// std
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+// local
+#include "scapx.h"
+#include "defs.h"
+
+// TODO: move this all to x.c
+
+static Server_context_t *init_XCB_server();
+static xcb_window_t create_win(Server_context_t *info);
+
+static Server_context_t *init_XCB_server()
+{
+	Server_context_t *info;
+
+	if (!(info = malloc(sizeof(Server_context_t)))) {
+		fprintf(stderr, "memory allocation failed.\n");
+		return NULL;
+	}
+
+	info->con = xcb_connect(NULL, &info->scr_nbr);
+	if (xcb_connection_has_error(info->con) > 0) {
+		fprintf(stderr, "Error opening display.\n");
+		free(info);
+		return NULL;
+	}
+
+	info->iter = xcb_setup_roots_iterator(xcb_get_setup(info->con));
+	for (; info->iter.rem; --info->scr_nbr, xcb_screen_next(&info->iter))
+		if (info->scr_nbr == 0) {
+			info->scr = info->iter.data;
+			break;
+		}
+
+	return info;
+}
+
+static xcb_window_t create_win(Server_context_t *info)
+{
+	xcb_gcontext_t gc;
+	xcb_window_t win;
+	u32 vmask, vlist[2];
+
+	// create gc
+	win = info->scr->root;
+	gc = xcb_generate_id(info->con);
+	vmask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES;
+	vlist[0] = info->scr->black_pixel;
+	vlist[1] = 0;
+	xcb_create_gc (info->con, gc, win, vmask, vlist);
+
+	// create window
+	win = xcb_generate_id(info->con);
+	vmask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
+	vlist[0] = info->scr->white_pixel;
+	vlist[1] = XCB_EVENT_MASK_EXPOSURE;
+
+	xcb_create_window(info->con,
+					  XCB_COPY_FROM_PARENT,
+					  win,
+					  info->scr->root,
+					  0, 0,
+					  150, 150,
+					  10,
+					  XCB_WINDOW_CLASS_INPUT_OUTPUT,
+					  info->scr->root_visual,
+					  vmask, vlist
+			   		 );
+	xcb_map_window(info->con, win);
+	xcb_flush(info->con);
+
+	return win;
+}
+
+int main(int argc, char **argv)
+{
+	// TODO: Parse flags
+
+	Server_context_t *serv_context = init_XCB_server();
+	xcb_drawable_t win = create_win(serv_context);
+	pause();
+
+	xcb_disconnect(serv_context->con);
+	free(serv_context);
+	return 0;
+}
-- 
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