From a0708eb3b6513fbbfe010e961d72ec4a2665fe2e Mon Sep 17 00:00:00 2001
From: sbosse <sbosse@uni-bremen.de>
Date: Mon, 14 Oct 2024 23:08:20 +0200
Subject: [PATCH] Mon 14 Oct 23:06:38 CEST 2024

---
 kernel/window.c | 103 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 kernel/window.c

diff --git a/kernel/window.c b/kernel/window.c
new file mode 100644
index 0000000..dc3c5d0
--- /dev/null
+++ b/kernel/window.c
@@ -0,0 +1,103 @@
+
+#include "window.h"
+#include "graphics.h"
+#include "kmalloc.h"
+#include "string.h"
+
+struct window {
+	struct window *parent;
+	struct graphics *graphics;
+	struct event_queue *queue;
+	int refcount;
+};
+
+struct window window_root = {0};
+
+struct window * window_create_root()
+{
+	struct window *w = &window_root;
+	w->parent = w;
+	w->graphics = graphics_create_root();
+	w->queue = event_queue_create_root();
+	w->refcount = 1;
+	return w;
+}
+
+struct window * window_create( struct window *parent, int x, int y, int width, int height )
+{
+	struct window *w = kmalloc(sizeof(*w));
+	w->parent = parent;
+	w->graphics = graphics_create(parent->graphics);
+	graphics_clip(w->graphics,x,y,width,height);
+	w->queue = event_queue_create();
+	w->refcount = 1;
+	w->parent->refcount++;
+	return w;
+}
+
+struct window * window_addref( struct window *w )
+{
+	w->refcount++;
+	return w;
+}
+
+void window_delete( struct window *w )
+{
+	if(!w) return;
+
+	if(w==&window_root) return;
+
+	w->refcount--;
+	if(w->refcount==0) {
+		graphics_delete(w->graphics);
+		event_queue_delete(w->queue);
+		window_delete(w->parent);
+		kfree(w);
+	}
+}
+
+int  window_width( struct window *w )
+{
+	return graphics_width(w->graphics);
+}
+
+int  window_height( struct window *w )
+{
+	return graphics_height(w->graphics);
+}
+
+struct graphics * window_graphics( struct window *w )
+{
+	return w->graphics;
+}
+
+int window_post_events( struct window *w, struct event *e, int size )
+{
+	int total = 0;
+
+	while(size>=sizeof(struct event)) {
+		event_queue_post(w->queue,e);
+		size -= sizeof(*e);
+		e++;
+		total += sizeof(*e);
+	}
+
+	return total;
+}
+
+int  window_read_events( struct window *w, struct event *e, int size )
+{
+	return event_queue_read(w->queue,e,size);
+}
+
+int  window_read_events_nonblock( struct window *w, struct event *e, int size )
+{
+	return event_queue_read_nonblock(w->queue,e,size);
+}
+
+int  window_write_graphics( struct window *w, int *cmd, int size )
+{
+	return graphics_write(w->graphics,cmd,size);	
+}
+
+