1 /*
2 Copyright (c) 2003-2010 Sony Pictures Imageworks Inc., et al.
3 All Rights Reserved.
4 
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are
7 met:
8 * Redistributions of source code must retain the above copyright
9   notice, this list of conditions and the following disclaimer.
10 * Redistributions in binary form must reproduce the above copyright
11   notice, this list of conditions and the following disclaimer in the
12   documentation and/or other materials provided with the distribution.
13 * Neither the name of Sony Pictures Imageworks nor the names of its
14   contributors may be used to endorse or promote products derived from
15   this software without specific prior written permission.
16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28 
29 
30 #ifndef INCLUDED_OCIO_LUT3DOP_H
31 #define INCLUDED_OCIO_LUT3DOP_H
32 
33 #include <OpenColorIO/OpenColorIO.h>
34 
35 #include "Mutex.h"
36 #include "Op.h"
37 
38 #include <vector>
39 
40 OCIO_NAMESPACE_ENTER
41 {
42     // TODO: turn into a class instead of a struct?
43 
44     struct Lut3D;
45     typedef OCIO_SHARED_PTR<Lut3D> Lut3DRcPtr;
46 
47     struct Lut3D
48     {
49         static Lut3DRcPtr Create();
50 
51         float from_min[3];
52         float from_max[3];
53         int size[3];
54 
55         typedef std::vector<float> fv_t;
56         fv_t lut;
57 
58         std::string getCacheID() const;
59 
60     private:
61         Lut3D();
62         mutable std::string m_cacheID;
63         mutable Mutex m_cacheidMutex;
64     };
65 
66     // RGB channel ordering.
67     // Pixels ordered in such a way that the blue coordinate changes fastest,
68     // then the green coordinate, and finally, the red coordinate changes slowest
69 
GetLut3DIndex_B(int indexR,int indexG,int indexB,int sizeR,int sizeG,int)70     inline int GetLut3DIndex_B(int indexR, int indexG, int indexB,
71                                int sizeR,  int sizeG,  int /*sizeB*/)
72     {
73         return 3 * (indexR + sizeR * (indexG + sizeG * indexB));
74     }
75 
76 
77     // RGB channel ordering.
78     // Pixels ordered in such a way that the red coordinate changes fastest,
79     // then the green coordinate, and finally, the blue coordinate changes slowest
80 
GetLut3DIndex_R(int indexR,int indexG,int indexB,int,int sizeG,int sizeB)81     inline int GetLut3DIndex_R(int indexR, int indexG, int indexB,
82                                int /*sizeR*/,  int sizeG,  int sizeB)
83     {
84         return 3 * (indexB + sizeB * (indexG + sizeG * indexR));
85     }
86 
87     // What is the preferred order for the lut3d?
88     // I.e., are the first two entries change along
89     // the blue direction, or the red direction?
90     // OpenGL expects 'red'
91 
92     enum Lut3DOrder
93     {
94         LUT3DORDER_FAST_RED = 0,
95         LUT3DORDER_FAST_BLUE
96     };
97 
98     void GenerateIdentityLut3D(float* img, int edgeLen, int numChannels,
99                                Lut3DOrder lut3DOrder);
100 
101     // Essentially the cube root, but will throw an exception if the
102     // cuberoot is not exact.
103     int Get3DLutEdgeLenFromNumPixels(int numPixels);
104 
105 
106 
107     void CreateLut3DOp(OpRcPtrVec & ops,
108                        Lut3DRcPtr lut,
109                        Interpolation interpolation,
110                        TransformDirection direction);
111 }
112 OCIO_NAMESPACE_EXIT
113 
114 #endif
115