1 ///////////////////////////////////////////////////////////////////////////
2 //
3 // Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
4 // Digital Ltd. LLC
5 //
6 // All rights reserved.
7 //
8 // Redistribution and use in source and binary forms, with or without
9 // modification, are permitted provided that the following conditions are
10 // met:
11 // *       Redistributions of source code must retain the above copyright
12 // notice, this list of conditions and the following disclaimer.
13 // *       Redistributions in binary form must reproduce the above
14 // copyright notice, this list of conditions and the following disclaimer
15 // in the documentation and/or other materials provided with the
16 // distribution.
17 // *       Neither the name of Industrial Light & Magic nor the names of
18 // its contributors may be used to endorse or promote products derived
19 // from this software without specific prior written permission.
20 //
21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 //
33 ///////////////////////////////////////////////////////////////////////////
34 
35 
36 #ifndef INCLUDED_IMF_RGBA_H
37 #define INCLUDED_IMF_RGBA_H
38 
39 //-----------------------------------------------------------------------------
40 //
41 //	class Rgba
42 //
43 //-----------------------------------------------------------------------------
44 
45 #include "half.h"
46 
47 namespace Imf {
48 
49 
50 //
51 // RGBA pixel
52 //
53 
54 struct Rgba
55 {
56     half	r;
57     half	g;
58     half	b;
59     half	a;
60 
RgbaRgba61     Rgba () {}
rRgba62     Rgba (half r, half g, half b, half a = 1.f): r (r), g (g), b (b), a (a) {}
63 
64     Rgba & operator = (const Rgba &other)
65     {
66         r = other.r;
67         g = other.g;
68         b = other.b;
69         a = other.a;
70 
71         return *this;
72     }
73 };
74 
75 
76 //
77 // Channels in an RGBA file
78 //
79 
80 enum RgbaChannels
81 {
82     WRITE_R	= 0x01,		// Red
83     WRITE_G	= 0x02,		// Green
84     WRITE_B	= 0x04,		// Blue
85     WRITE_A	= 0x08,		// Alpha
86 
87     WRITE_Y	= 0x10,		// Luminance, for black-and-white images,
88                     // or in combination with chroma
89 
90     WRITE_C	= 0x20,		// Chroma (two subsampled channels, RY and BY,
91                     // supported only for scanline-based files)
92 
93     WRITE_RGB	= 0x07,		// Red, green, blue
94     WRITE_RGBA	= 0x0f,		// Red, green, blue, alpha
95 
96     WRITE_YC	= 0x30,		// Luminance, chroma
97     WRITE_YA	= 0x18,		// Luminance, alpha
98     WRITE_YCA	= 0x38		// Luminance, chroma, alpha
99 };
100 
101 
102 } // namespace Imf
103 
104 #endif
105