From 6cd45908c3d62f845f1847009a0c38504f0d0082 Mon Sep 17 00:00:00 2001 From: Bent Bisballe Nyeng Date: Sun, 4 Sep 2016 21:15:39 +0200 Subject: Add Canvas base class for the Painter to draw on. This is done in preparation for a new Painter unittest. --- plugingui/canvas.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 plugingui/canvas.h (limited to 'plugingui/canvas.h') diff --git a/plugingui/canvas.h b/plugingui/canvas.h new file mode 100644 index 0000000..8cfe083 --- /dev/null +++ b/plugingui/canvas.h @@ -0,0 +1,50 @@ +/* -*- 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:: -- cgit v1.2.3