1 /* 2 * Copyright 2012 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 SkOTTableTypes_DEFINED 9 #define SkOTTableTypes_DEFINED 10 11 #include "SkTypes.h" 12 #include "SkEndian.h" 13 14 //All SK_OT_ prefixed types should be considered as big endian. 15 typedef uint8_t SK_OT_BYTE; 16 #if CHAR_BIT == 8 17 typedef signed char SK_OT_CHAR; //easier to debug 18 #else 19 typedef int8_t SK_OT_CHAR; 20 #endif 21 typedef uint16_t SK_OT_SHORT; 22 typedef uint16_t SK_OT_USHORT; 23 typedef uint32_t SK_OT_ULONG; 24 typedef uint32_t SK_OT_LONG; 25 //16.16 Signed fixed point representation. 26 typedef int32_t SK_OT_Fixed; 27 //2.14 Signed fixed point representation. 28 typedef uint16_t SK_OT_F2DOT14; 29 //F units are the units of measurement in em space. 30 typedef uint16_t SK_OT_FWORD; 31 typedef uint16_t SK_OT_UFWORD; 32 //Number of seconds since 12:00 midnight, January 1, 1904. 33 typedef uint64_t SK_OT_LONGDATETIME; 34 35 #define SK_OT_BYTE_BITFIELD SK_UINT8_BITFIELD 36 37 template<typename T> class SkOTTableTAG { 38 public: 39 /** 40 * SkOTTableTAG<T>::value is the big endian value of an OpenType table tag. 41 * It may be directly compared with raw big endian table data. 42 */ 43 static const SK_OT_ULONG value = SkTEndian_SwapBE32( 44 SkSetFourByteTag(T::TAG0, T::TAG1, T::TAG2, T::TAG3) 45 ); 46 }; 47 48 /** SkOTSetUSHORTBit<N>::value is an SK_OT_USHORT with the Nth BE bit set. */ 49 template <unsigned N> struct SkOTSetUSHORTBit { 50 static_assert(N < 16, "NTooBig"); 51 static const uint16_t bit = 1u << N; 52 static const SK_OT_USHORT value = SkTEndian_SwapBE16(bit); 53 }; 54 55 /** SkOTSetULONGBit<N>::value is an SK_OT_ULONG with the Nth BE bit set. */ 56 template <unsigned N> struct SkOTSetULONGBit { 57 static_assert(N < 32, "NTooBig"); 58 static const uint32_t bit = 1u << N; 59 static const SK_OT_ULONG value = SkTEndian_SwapBE32(bit); 60 }; 61 62 #endif 63