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 /* 55 * Given fn and toXYZD50, generate a decription tag that either includes a hash 56 * of the function and gamut or is a special name. 57 * Exposed for unit testing and tools. 58 */ 59 SkString SkICCGetColorProfileTag(const SkColorSpaceTransferFn& fn, 60 const SkMatrix44& toXYZD50); 61 #endif // SkICCPriv_DEFINED 62