summaryrefslogtreecommitdiff
path: root/plugingui/canvas.h
diff options
context:
space:
mode:
authorBent Bisballe Nyeng <deva@aasimon.org>2016-09-04 21:15:39 +0200
committerBent Bisballe Nyeng <deva@aasimon.org>2016-09-04 21:15:39 +0200
commit6cd45908c3d62f845f1847009a0c38504f0d0082 (patch)
tree230b4cca4e7c84a7b16a5ab4c7aeca8597f0b167 /plugingui/canvas.h
parent107102992a25781d0fef5c4d38b799f5fe38dd24 (diff)
Add Canvas base class for the Painter to draw on. This is done in preparation for a new Painter unittest.
Diffstat (limited to 'plugingui/canvas.h')
-rw-r--r--plugingui/canvas.h50
1 files changed, 50 insertions, 0 deletions
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::