started work on border radius

src/ugui_cmd.c3

@@ -0,0 +1,34 @@
+module ugui;
+
+// FIXME: is this really the best solution?
+// "rect" is the bounding box of the element, which includes the border and the padding (so not just the content)
+fn void! Ctx.push_rect(&ctx, Rect rect, Color color, bool do_border = false, bool do_padding = false, bool do_radius = false)
+{
+	Rect border = ctx.style.border;
+	Rect padding = ctx.style.padding;
+	ushort radius = ctx.style.radius;
+	Color border_color = ctx.style.brcolor;
+
+	if (do_border) {
+		Cmd cmd = {
+			.type = CMD_RECT,
+			.rect.rect = rect,
+			.rect.color = border_color,
+			.rect.radius = do_radius ? radius : 0,
+		};
+		ctx.cmd_queue.enqueue(&cmd)!;
+	}
+	
+	Cmd cmd = {
+		.type = CMD_RECT,
+		.rect.rect = {
+			.x = rect.x + (do_border ? border.x : 0) + (do_padding ? padding.x : 0),
+			.y = rect.y + (do_border ? border.y : 0) + (do_padding ? padding.y : 0),
+			.w = rect.w - (do_border ? border.x+border.w : 0) - (do_padding ? padding.x+padding.w : 0),
+			.h = rect.h - (do_border ? border.y+border.h : 0) - (do_padding ? padding.y+padding.h : 0),
+		},
+		.rect.color = color,
+		.rect.radius = do_radius ? radius : 0,
+	};
+	ctx.cmd_queue.enqueue(&cmd)!;
+}