summaryrefslogtreecommitdiff
path: root/plugingui/canvas.h
blob: 8cfe083e7cdc6621ee6a47659279163b5b0f917d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            canvas.h
 *
 *  Sun Sep  4 13:03:51 CEST 2016
 *  Copyright 2016 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of DrumGizmo.
 *
 *  DrumGizmo is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  DrumGizmo is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with DrumGizmo; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#pragma once

#include "pixelbuffer.h"

namespace GUI
{

//! Abstract class that can be used by the Paiter to draw on.
class Canvas
{
public:
	//! @returns a reference to the pixel buffer.
	virtual PixelBufferAlpha& GetPixelBuffer() = 0;

	//! Signal the beginning of a paint operation.
	virtual void beginPaint() = 0;

	//! Signal the ending of a paint operation
	//! This might trigger a redraw operation.
	virtual void endPaint() = 0;

};

} // GUI::