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 "SkTemplates.h" 12 #include "SkTypes.h" 13 #include "SkEndian.h" 14 15 //All SK_OT_ prefixed types should be considered as big endian. 16 typedef uint8_t SK_OT_BYTE; 17 #if CHAR_BIT == 8 18 typedef signed char SK_OT_CHAR; //easier to debug 19 #else 20 typedef int8_t SK_OT_CHAR; 21 #endif 22 typedef uint16_t SK_OT_SHORT; 23 typedef uint16_t SK_OT_USHORT; 24 typedef uint32_t SK_OT_ULONG; 25 typedef uint32_t SK_OT_LONG; 26 //16.16 Signed fixed point representation. 27 typedef int32_t SK_OT_Fixed; 28 //2.14 Signed fixed point representation. 29 typedef uint16_t SK_OT_F2DOT14; 30 //F units are the units of measurement in em space. 31 typedef uint16_t SK_OT_FWORD; 32 typedef uint16_t SK_OT_UFWORD; 33 //Number of seconds since 12:00 midnight, January 1, 1904. 34 typedef uint64_t SK_OT_LONGDATETIME; 35 36 #define SK_OT_BYTE_BITFIELD SK_UINT8_BITFIELD 37 38 template<typename T> class SkOTTableTAG { 39 public: 40 /** 41 * SkOTTableTAG<T>::value is the big endian value of an OpenType table tag. 42 * It may be directly compared with raw big endian table data. 43 */ 44 static const SK_OT_ULONG value = SkTEndian_SwapBE32( 45 SkSetFourByteTag(T::TAG0, T::TAG1, T::TAG2, T::TAG3) 46 ); 47 }; 48 49 /** SkOTSetUSHORTBit<N>::value is an SK_OT_USHORT with the Nth BE bit set. */ 50 template <unsigned N> struct SkOTSetUSHORTBit { 51 SK_COMPILE_ASSERT(N < 16, NTooBig); 52 static const uint16_t bit = 1u << N; 53 static const SK_OT_USHORT value = SkTEndian_SwapBE16(bit); 54 }; 55 56 /** SkOTSetULONGBit<N>::value is an SK_OT_ULONG with the Nth BE bit set. */ 57 template <unsigned N> struct SkOTSetULONGBit { 58 SK_COMPILE_ASSERT(N < 32, NTooBig); 59 static const uint32_t bit = 1u << N; 60 static const SK_OT_ULONG value = SkTEndian_SwapBE32(bit); 61 }; 62 63 #endif 64