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59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
/*
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* \brief Functor for drawing filled boxes into a surface
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* \author Norman Feske
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* \date 2006-08-04
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*/
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/*
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* Copyright (C) 2006-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__NITPICKER_GFX__BOX_PAINTER_H_
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#define _INCLUDE__NITPICKER_GFX__BOX_PAINTER_H_
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#include <os/surface.h>
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struct Box_painter
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{
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typedef Genode::Surface_base::Rect Rect;
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/**
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* Draw filled box
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*
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* \param rect position and size of box
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* \param color drawing color
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*/
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template <typename PT>
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static inline void paint(Genode::Surface<PT> &surface,
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Rect rect,
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Genode::Color color)
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{
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Rect clipped = Rect::intersect(surface.clip(), rect);
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if (!clipped.valid()) return;
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PT pix(color.r, color.g, color.b);
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PT *dst, *dst_line = surface.addr() + surface.size().w()*clipped.y1() + clipped.x1();
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int const alpha = color.a;
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if (color.opaque())
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for (int w, h = clipped.h() ; h--; dst_line += surface.size().w())
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for (dst = dst_line, w = clipped.w(); w--; dst++)
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*dst = pix;
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else if (!color.transparent())
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for (int w, h = clipped.h() ; h--; dst_line += surface.size().w())
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for (dst = dst_line, w = clipped.w(); w--; dst++)
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*dst = PT::mix(*dst, pix, alpha);
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surface.flush_pixels(clipped);
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}
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};
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#endif /* _INCLUDE__NITPICKER_GFX__BOX_PAINTER_H_ */
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