From e3e16e2fb021b61e45b01113cb1654cd7e4911c6 Mon Sep 17 00:00:00 2001
From: rodri <rgl@antares-labs.eu>
Date: Sat, 13 Jun 2020 21:35:02 +0000
Subject: added basic canvas and layer management.

---
 layer.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'layer.c')

diff --git a/layer.c b/layer.c
index 5673183..d238b99 100644
--- a/layer.c
+++ b/layer.c
@@ -2,4 +2,30 @@
 #include <libc.h>
 #include <draw.h>
 #include <geometry.h>
+#include "dat.h"
+#include "fns.h"
 
+Layer*
+newlayer(Canvas *c)
+{
+	Layer *l;
+
+	l = emalloc(sizeof(Layer));
+	l->p = Pt2(0,0,1);
+	l->bx = c->bx;
+	l->by = c->by;
+	l->image = eallocimage(display, c->image->r, c->image->chan, 0, DNofill);
+	l->prev = c->layers.prev;
+	l->next = &c->layers;
+	c->layers.prev->next = l;
+	c->layers.prev = l;
+}
+
+void
+rmlayer(Layer *l)
+{
+	l->prev->next = l->next;
+	l->next->prev = l->prev;
+	freeimage(l->image);
+	free(l);
+}
-- 
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