46 lines
1.0 KiB
C++
46 lines
1.0 KiB
C++
/*
|
|
* \brief Template specializations for the ALPHA8 pixel format
|
|
* \author Norman Feske
|
|
* \date 2014-09-10
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2014-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__OS__PIXEL_ALPHA8_H_
|
|
#define _INCLUDE__OS__PIXEL_ALPHA8_H_
|
|
|
|
#include <os/pixel_rgba.h>
|
|
|
|
namespace Genode {
|
|
|
|
typedef Genode::Pixel_rgba<unsigned char, Genode::Surface_base::ALPHA8,
|
|
0, 0, 0, 0, 0, 0, 0xff, 0>
|
|
Pixel_alpha8;
|
|
|
|
|
|
/*
|
|
* The second pixel parameter is ignored. It can be of any pixel type.
|
|
*/
|
|
template <>
|
|
template <typename PT>
|
|
inline Pixel_alpha8 Pixel_alpha8::mix(Pixel_alpha8 p1, PT, int alpha)
|
|
{
|
|
Pixel_alpha8 res;
|
|
res.pixel = p1.pixel + (((255 - p1.pixel)*alpha) >> 8);
|
|
return res;
|
|
}
|
|
|
|
template <>
|
|
inline Pixel_alpha8 Pixel_alpha8::mix(Pixel_alpha8 p1, Pixel_alpha8 p2, int alpha)
|
|
{
|
|
return mix<Pixel_alpha8>(p1, p2, alpha);
|
|
}
|
|
}
|
|
|
|
#endif /* _INCLUDE__OS__PIXEL_ALPHA8_H_ */
|