From 6d9775a54f539d3ca744c0de80f5ff5d9feeb322 Mon Sep 17 00:00:00 2001
From: xyz <gky44px1999@gmail.com>
Date: Mon, 2 May 2022 05:22:20 -0700
Subject: init

---
 .gitignore |  1 +
 Makefile   | 18 ++++++++++++++++++
 README.md  | 10 ++++++++++
 main.c     | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 76 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 README.md
 create mode 100644 main.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d37518c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+xcross
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..06698e0
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,18 @@
+CC = gcc
+CFLAGS = -g -Wall -lX11
+PREFIX = /usr/local
+
+xcross: main.c
+	$(CC) $(CFLAGS) -o $@ $<
+
+clean:
+	rm -f xcross
+
+install:
+	cp -f xcross ${DESTDIR}${PREFIX}/bin
+	chmod 755 ${DESTDIR}${PREFIX}/bin/xcross
+
+uninstall:
+	rm -f ${DESTDIR}${PREFIX}/bin/xcross
+
+.PHONY: clean install uninstall
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..508eee3
--- /dev/null
+++ b/README.md
@@ -0,0 +1,10 @@
+# in development
+
+# references
+
+## main.c
+<https://github.com/gvalkov/xrectsel>
+
+## Makefile
+<https://github.com/BlueCannonBall/XAim>
+<https://git.suckless.org/dwm>
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..7603a26
--- /dev/null
+++ b/main.c
@@ -0,0 +1,47 @@
+// edit source code from: https://github.com/gvalkov/xrectsel
+//#include <stdio.h>
+#include <X11/Xlib.h>
+#include <unistd.h>
+
+//int main (int argc, char *argv[])
+int main (void)
+{
+    int int_tmp;
+    unsigned int uint_tmp;
+	Window window_tmp;
+
+	int rootx=0, rooty=0;
+
+	Display * disp = XOpenDisplay(NULL);
+    Screen * scr = ScreenOfDisplay(disp, DefaultScreen(disp));
+    Window root = RootWindow(disp, XScreenNumberOfScreen(scr));
+
+    XGCValues gcval;
+    gcval.foreground = XWhitePixel(disp, 0);
+    gcval.function   = GXxor;
+    gcval.background = XBlackPixel(disp, 0);
+    gcval.plane_mask = gcval.background ^ gcval.foreground;
+    gcval.subwindow_mode = IncludeInferiors;
+    GC gc = XCreateGC(disp, root,
+                      GCFunction|GCForeground|GCBackground|GCSubwindowMode,
+                      &gcval);
+
+	XQueryPointer(disp, root, &window_tmp, &window_tmp, &rootx, &rooty, &int_tmp, &int_tmp, &uint_tmp);
+	//printf("%d\n", DisplayWidth(disp, DefaultScreen(disp)));
+	//printf("%d\n\n", DisplayHeight(disp, DefaultScreen(disp)));
+	// XGetGeometry() maybe better, instead of DisplayHeight() and DisplayWidth()
+	XDrawLine(disp, root, gc, rootx, 0, rootx, DisplayHeight(disp, DefaultScreen(disp)));
+	XDrawLine(disp, root, gc, 0, rooty, DisplayWidth(disp, DefaultScreen(disp)), rooty);
+	//XDrawRectangle(disp, root, gc, 1000, 1000, 1000, 1000);
+	XFlush(disp);
+
+    XUngrabPointer(disp, CurrentTime);
+    XUngrabKeyboard(disp, CurrentTime);
+	//XFreeCursor(disp, cursor);
+    XFreeGC(disp, gc);
+    XSync(disp, True);
+
+    XCloseDisplay(disp);
+
+	return 0;
+}
-- 
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