/
gfx-color.go
132 lines (117 loc) · 3.87 KB
/
gfx-color.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
// Copyright 2012. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2012 Laurent Gomila (laurent.gom@gmail.com)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
package sfml
// #cgo LDFLAGS:-lcsfml-graphics -ljpeg
// #include <SFML/Graphics/Color.h>
// #include <SFML/Window/Context.h>
// #include <SFML/Window/Export.h>
// #include <SFML/Window/Types.h>
// #include <SFML/Graphics/Export.h>
import "C"
import "fmt"
// Utility class for manpulating RGBA colors
type Color struct {
Cref C.sfColor
}
// Construct a color from its 3 RGB components
//
// \param red Red component (0 .. 255)
// \param green Green component (0 .. 255)
// \param blue Blue component (0 .. 255)
//
// \return sfColor constructed from the components
// sfColor sfColor_fromRGB(sfUint8 red, sfUint8 green, sfUint8 blue);
func FromRGB(red uint8, green uint8, blue uint8) Color {
return Color{C.sfColor_fromRGB(
C.sfUint8(red),
C.sfUint8(green),
C.sfUint8(blue),
)}
}
// Construct a color from its 4 RGBA components
//
// \param red Red component (0 .. 255)
// \param green Green component (0 .. 255)
// \param blue Blue component (0 .. 255)
// \param alpha Alpha component (0 .. 255)
//
// \return sfColor constructed from the components
//
// sfColor sfColor_fromRGBA(sfUint8 red, sfUint8 green, sfUint8 blue, sfUint8 alpha);
func FromRGBA(red uint8, green uint8, blue uint8, alpha uint8) Color {
return Color{C.sfColor_fromRGBA(
C.sfUint8(red),
C.sfUint8(green),
C.sfUint8(blue),
C.sfUint8(alpha),
)}
}
// Add two colors
//
// \param color2 Second color
//
// \return Component-wise saturated addition of the two colors
//
// sfColor sfColor_add(sfColor color1, sfColor color2);
func (self Color) Add(color2 Color) Color {
return Color{C.sfColor_add(self.Cref, color2.Cref)}
}
// Modulate two colors
//
// \param color1 First color
// \param color2 Second color
//
// \return Component-wise multiplication of the two colors
//
// sfColor sfColor_modulate(sfColor color1, sfColor color2);
func (self Color) Modulate(color2 Color) Color {
return Color{C.sfColor_modulate(self.Cref, color2.Cref)}
}
// Return the red component of a color
func (self Color) Red() uint8 {
return uint8(self.Cref.r)
}
// Return the green component of a color
func (self Color) Green() uint8 {
return uint8(self.Cref.g)
}
// Return the blue component of a color
func (self Color) Blue() uint8 {
return uint8(self.Cref.b)
}
// Return the alpha component of a color
func (self Color) Alpha() uint8 {
return uint8(self.Cref.a)
}
// Return the components of a color
func (self Color) Components() (uint8, uint8, uint8, uint8) {
return self.Red(), self.Green(), self.Blue(), self.Alpha()
}
// Return a string describing the color
func (self Color) String() string {
return fmt.Sprintf("Color{r=%d, g=%d, b=%d, a=%d}", self.Red(), self.Green(), self.Blue(), self.Alpha())
}