1 files changed, 60 insertions, 0 deletions
diff --git a/src/x11_support.c b/src/x11_support.c
new file mode 100644
index 0000000..87dd1ac
--- /dev/null
+++ b/src/x11_support.c
@@ -0,0 +1,60 @@
+/*
+ * x11_support.c
+ *
+ * Created by buzzert <buzzert@buzzert.net> 2019-01-18
+ */
+
+#include "x11_support.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+static Window __window = { 0 };
+static Display *__display = NULL;
+
+cairo_surface_t* x11_helper_acquire_cairo_surface(int width, int height)
+{
+    __display = XOpenDisplay(NULL);
+    if (__display == NULL) {
+        fprintf(stderr, "Error opening display\n");
+        return NULL;
+    }
+
+    Window root_window = DefaultRootWindow(__display);
+    __window = XCreateSimpleWindow(
+            __display,      // display
+            root_window,    // parent window
+            0, 0,           // x, y
+            width,          // width
+            height,         // height
+            0,              // border_width
+            0,              // border
+            0               // background
+    );
+
+    // Enable key events
+    XSelectInput(__display, __window, ButtonPressMask | KeyPressMask | StructureNotifyMask);
+
+    // Map window to display
+    XMapWindow(__display, __window);
+
+    // Create cairo surface
+    int screen = DefaultScreen(__display);
+    Visual *visual = DefaultVisual(__display, screen);
+    cairo_surface_t *surface = cairo_xlib_surface_create(
+            __display, 
+            __window,
+            visual, 
+            width, 
+            height
+    );
+
+    return surface;
+}
+
+void x11_helper_destroy_surface(cairo_surface_t *surface)
+{
+    cairo_surface_destroy(surface);
+    XCloseDisplay(__display);
+}
+