mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-20 14:13:09 +00:00
74 lines
1.6 KiB
C++
74 lines
1.6 KiB
C++
/*
|
|
* \brief Generic pixel representation
|
|
* \author Norman Feske
|
|
* \date 2006-08-04
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2006-2013 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__NITPICKER_GFX__PIXEL_RGB_H_
|
|
#define _INCLUDE__NITPICKER_GFX__PIXEL_RGB_H_
|
|
|
|
/*
|
|
* \param ST storage type of one pixel
|
|
*/
|
|
template <typename ST, int R_MASK, int R_SHIFT,
|
|
int G_MASK, int G_SHIFT,
|
|
int B_MASK, int B_SHIFT>
|
|
class Pixel_rgb
|
|
{
|
|
private:
|
|
|
|
/**
|
|
* Shift left with positive or negative shift value
|
|
*/
|
|
inline int _shift(int value, int shift) {
|
|
return shift > 0 ? value << shift : value >> -shift; }
|
|
|
|
public:
|
|
|
|
static const int r_mask = R_MASK, r_shift = R_SHIFT;
|
|
static const int g_mask = G_MASK, g_shift = G_SHIFT;
|
|
static const int b_mask = B_MASK, b_shift = B_SHIFT;
|
|
|
|
ST pixel;
|
|
|
|
/**
|
|
* Constructors
|
|
*/
|
|
Pixel_rgb() {}
|
|
|
|
Pixel_rgb(int red, int green, int blue):
|
|
pixel((_shift(red, r_shift) & r_mask)
|
|
| (_shift(green, g_shift) & g_mask)
|
|
| (_shift(blue, b_shift) & b_mask)) { }
|
|
|
|
/**
|
|
* Compute average color value of two pixels
|
|
*/
|
|
static inline Pixel_rgb avr(Pixel_rgb p1, Pixel_rgb p2);
|
|
|
|
/**
|
|
* Multiply pixel with alpha value
|
|
*/
|
|
static inline Pixel_rgb blend(Pixel_rgb pixel, int alpha);
|
|
|
|
/**
|
|
* Mix two pixels at the ratio specified as alpha
|
|
*/
|
|
static inline Pixel_rgb mix(Pixel_rgb p1, Pixel_rgb p2, int alpha);
|
|
|
|
/**
|
|
* Return alpha value of pixel
|
|
*/
|
|
int alpha();
|
|
|
|
} __attribute__((packed));
|
|
|
|
#endif /* _INCLUDE__NITPICKER_GFX__PIXEL_RGB_H_ */
|