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1 /*
2  * Copyright 2016 Google Inc.
3  *
4  * Use of this source code is governed by a BSD-style license that can be
5  * found in the LICENSE file.
6  */
7 
8 #ifndef SkICCPriv_DEFINED
9 #define SkICCPriv_DEFINED
10 
11 #include "SkColorSpace.h"
12 #include "SkTypes.h"
13 
14 // This is equal to the header size according to the ICC specification (128)
15 // plus the size of the tag count (4).  We include the tag count since we
16 // always require it to be present anyway.
17 static constexpr size_t kICCHeaderSize = 132;
18 
19 // Contains a signature (4), offset (4), and size (4).
20 static constexpr size_t kICCTagTableEntrySize = 12;
21 
22 static constexpr uint32_t kRGB_ColorSpace     = SkSetFourByteTag('R', 'G', 'B', ' ');
23 static constexpr uint32_t kCMYK_ColorSpace    = SkSetFourByteTag('C', 'M', 'Y', 'K');
24 static constexpr uint32_t kGray_ColorSpace    = SkSetFourByteTag('G', 'R', 'A', 'Y');
25 static constexpr uint32_t kDisplay_Profile    = SkSetFourByteTag('m', 'n', 't', 'r');
26 static constexpr uint32_t kInput_Profile      = SkSetFourByteTag('s', 'c', 'n', 'r');
27 static constexpr uint32_t kOutput_Profile     = SkSetFourByteTag('p', 'r', 't', 'r');
28 static constexpr uint32_t kColorSpace_Profile = SkSetFourByteTag('s', 'p', 'a', 'c');
29 static constexpr uint32_t kXYZ_PCSSpace       = SkSetFourByteTag('X', 'Y', 'Z', ' ');
30 static constexpr uint32_t kLAB_PCSSpace       = SkSetFourByteTag('L', 'a', 'b', ' ');
31 static constexpr uint32_t kACSP_Signature     = SkSetFourByteTag('a', 'c', 's', 'p');
32 
33 static constexpr uint32_t kTAG_rXYZ = SkSetFourByteTag('r', 'X', 'Y', 'Z');
34 static constexpr uint32_t kTAG_gXYZ = SkSetFourByteTag('g', 'X', 'Y', 'Z');
35 static constexpr uint32_t kTAG_bXYZ = SkSetFourByteTag('b', 'X', 'Y', 'Z');
36 static constexpr uint32_t kTAG_rTRC = SkSetFourByteTag('r', 'T', 'R', 'C');
37 static constexpr uint32_t kTAG_gTRC = SkSetFourByteTag('g', 'T', 'R', 'C');
38 static constexpr uint32_t kTAG_bTRC = SkSetFourByteTag('b', 'T', 'R', 'C');
39 static constexpr uint32_t kTAG_kTRC = SkSetFourByteTag('k', 'T', 'R', 'C');
40 static constexpr uint32_t kTAG_A2B0 = SkSetFourByteTag('A', '2', 'B', '0');
41 
42 static constexpr uint32_t kTAG_CurveType     = SkSetFourByteTag('c', 'u', 'r', 'v');
43 static constexpr uint32_t kTAG_ParaCurveType = SkSetFourByteTag('p', 'a', 'r', 'a');
44 static constexpr uint32_t kTAG_TextType      = SkSetFourByteTag('m', 'l', 'u', 'c');
45 
46 enum ParaCurveType {
47     kExponential_ParaCurveType = 0,
48     kGAB_ParaCurveType         = 1,
49     kGABC_ParaCurveType        = 2,
50     kGABDE_ParaCurveType       = 3,
51     kGABCDEF_ParaCurveType     = 4,
52 };
53 
54 #endif  // SkICCPriv_DEFINED
55