1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/sfnt/SkOTTable_glyf.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,214 @@
1.4 +/*
1.5 + * Copyright 2012 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef SkOTTable_glyf_DEFINED
1.12 +#define SkOTTable_glyf_DEFINED
1.13 +
1.14 +#include "SkEndian.h"
1.15 +#include "SkOTTableTypes.h"
1.16 +#include "SkOTTable_head.h"
1.17 +#include "SkOTTable_loca.h"
1.18 +#include "SkTypedEnum.h"
1.19 +
1.20 +#pragma pack(push, 1)
1.21 +
1.22 +struct SkOTTableGlyphData;
1.23 +
1.24 +extern uint8_t const * const SK_OT_GlyphData_NoOutline;
1.25 +
1.26 +struct SkOTTableGlyph {
1.27 + static const SK_OT_CHAR TAG0 = 'g';
1.28 + static const SK_OT_CHAR TAG1 = 'l';
1.29 + static const SK_OT_CHAR TAG2 = 'y';
1.30 + static const SK_OT_CHAR TAG3 = 'f';
1.31 + static const SK_OT_ULONG TAG = SkOTTableTAG<SkOTTableGlyph>::value;
1.32 +
1.33 + class Iterator {
1.34 + public:
1.35 + Iterator(const SkOTTableGlyph& glyf,
1.36 + const SkOTTableIndexToLocation& loca,
1.37 + SkOTTableHead::IndexToLocFormat locaFormat)
1.38 + : fGlyf(glyf)
1.39 + , fLocaFormat(SkOTTableHead::IndexToLocFormat::ShortOffsets == locaFormat.value ? 0 : 1)
1.40 + , fCurrentGlyphOffset(0)
1.41 + { fLocaPtr.shortOffset = reinterpret_cast<const SK_OT_USHORT*>(&loca); }
1.42 +
1.43 + void advance(uint16_t num) {
1.44 + fLocaPtr.shortOffset += num << fLocaFormat;
1.45 + fCurrentGlyphOffset = fLocaFormat ? SkEndian_SwapBE32(*fLocaPtr.longOffset)
1.46 + : uint32_t(SkEndian_SwapBE16(*fLocaPtr.shortOffset) << 1);
1.47 + }
1.48 + const SkOTTableGlyphData* next() {
1.49 + uint32_t previousGlyphOffset = fCurrentGlyphOffset;
1.50 + advance(1);
1.51 + if (previousGlyphOffset == fCurrentGlyphOffset) {
1.52 + return reinterpret_cast<const SkOTTableGlyphData*>(&SK_OT_GlyphData_NoOutline);
1.53 + } else {
1.54 + return reinterpret_cast<const SkOTTableGlyphData*>(
1.55 + reinterpret_cast<const SK_OT_BYTE*>(&fGlyf) + previousGlyphOffset
1.56 + );
1.57 + }
1.58 + }
1.59 + private:
1.60 + const SkOTTableGlyph& fGlyf;
1.61 + uint16_t fLocaFormat; //0 or 1
1.62 + uint32_t fCurrentGlyphOffset;
1.63 + union LocaPtr {
1.64 + const SK_OT_USHORT* shortOffset;
1.65 + const SK_OT_ULONG* longOffset;
1.66 + } fLocaPtr;
1.67 + };
1.68 +};
1.69 +
1.70 +struct SkOTTableGlyphData {
1.71 + SK_OT_SHORT numberOfContours; //== -1 Composite, > 0 Simple
1.72 + SK_OT_FWORD xMin;
1.73 + SK_OT_FWORD yMin;
1.74 + SK_OT_FWORD xMax;
1.75 + SK_OT_FWORD yMax;
1.76 +
1.77 + struct Simple {
1.78 + SK_OT_USHORT endPtsOfContours[1/*numberOfContours*/];
1.79 +
1.80 + struct Instructions {
1.81 + SK_OT_USHORT length;
1.82 + SK_OT_BYTE data[1/*length*/];
1.83 + };
1.84 +
1.85 + union Flags {
1.86 + struct Field {
1.87 + SK_OT_BYTE_BITFIELD(
1.88 + OnCurve,
1.89 + xShortVector,
1.90 + yShortVector,
1.91 + Repeat,
1.92 + xIsSame_xShortVectorPositive,
1.93 + yIsSame_yShortVectorPositive,
1.94 + Reserved6,
1.95 + Reserved7)
1.96 + } field;
1.97 + struct Raw {
1.98 + static const SK_OT_USHORT OnCurveMask = SkTEndian_SwapBE16(1 << 0);
1.99 + static const SK_OT_USHORT xShortVectorMask = SkTEndian_SwapBE16(1 << 1);
1.100 + static const SK_OT_USHORT yShortVectorMask = SkTEndian_SwapBE16(1 << 2);
1.101 + static const SK_OT_USHORT RepeatMask = SkTEndian_SwapBE16(1 << 3);
1.102 + static const SK_OT_USHORT xIsSame_xShortVectorPositiveMask = SkTEndian_SwapBE16(1 << 4);
1.103 + static const SK_OT_USHORT yIsSame_yShortVectorPositiveMask = SkTEndian_SwapBE16(1 << 5);
1.104 + SK_OT_BYTE value;
1.105 + } raw;
1.106 + };
1.107 +
1.108 + //xCoordinates
1.109 + //yCoordinates
1.110 + };
1.111 +
1.112 + struct Composite {
1.113 + struct Component {
1.114 + union Flags {
1.115 + struct Field {
1.116 + //8-15
1.117 + SK_OT_BYTE_BITFIELD(
1.118 + WE_HAVE_INSTRUCTIONS,
1.119 + USE_MY_METRICS,
1.120 + OVERLAP_COMPOUND,
1.121 + SCALED_COMPONENT_OFFSET,
1.122 + UNSCALED_COMPONENT_OFFSET,
1.123 + Reserved13,
1.124 + Reserved14,
1.125 + Reserved15)
1.126 + //0-7
1.127 + SK_OT_BYTE_BITFIELD(
1.128 + ARG_1_AND_2_ARE_WORDS,
1.129 + ARGS_ARE_XY_VALUES,
1.130 + ROUND_XY_TO_GRID,
1.131 + WE_HAVE_A_SCALE,
1.132 + RESERVED,
1.133 + MORE_COMPONENTS,
1.134 + WE_HAVE_AN_X_AND_Y_SCALE,
1.135 + WE_HAVE_A_TWO_BY_TWO)
1.136 + } field;
1.137 + struct Raw {
1.138 + static const SK_OT_USHORT ARG_1_AND_2_ARE_WORDS_Mask = SkTEndian_SwapBE16(1 << 0);
1.139 + static const SK_OT_USHORT ARGS_ARE_XY_VALUES_Mask = SkTEndian_SwapBE16(1 << 1);
1.140 + static const SK_OT_USHORT ROUND_XY_TO_GRID_Mask = SkTEndian_SwapBE16(1 << 2);
1.141 + static const SK_OT_USHORT WE_HAVE_A_SCALE_Mask = SkTEndian_SwapBE16(1 << 3);
1.142 + static const SK_OT_USHORT RESERVED_Mask = SkTEndian_SwapBE16(1 << 4);
1.143 + static const SK_OT_USHORT MORE_COMPONENTS_Mask = SkTEndian_SwapBE16(1 << 5);
1.144 + static const SK_OT_USHORT WE_HAVE_AN_X_AND_Y_SCALE_Mask = SkTEndian_SwapBE16(1 << 6);
1.145 + static const SK_OT_USHORT WE_HAVE_A_TWO_BY_TWO_Mask = SkTEndian_SwapBE16(1 << 7);
1.146 +
1.147 + static const SK_OT_USHORT WE_HAVE_INSTRUCTIONS_Mask = SkTEndian_SwapBE16(1 << 8);
1.148 + static const SK_OT_USHORT USE_MY_METRICS_Mask = SkTEndian_SwapBE16(1 << 9);
1.149 + static const SK_OT_USHORT OVERLAP_COMPOUND_Mask = SkTEndian_SwapBE16(1 << 10);
1.150 + static const SK_OT_USHORT SCALED_COMPONENT_OFFSET_Mask = SkTEndian_SwapBE16(1 << 11);
1.151 + static const SK_OT_USHORT UNSCALED_COMPONENT_OFFSET_mask = SkTEndian_SwapBE16(1 << 12);
1.152 + //Reserved
1.153 + //Reserved
1.154 + //Reserved
1.155 + SK_OT_USHORT value;
1.156 + } raw;
1.157 + } flags;
1.158 + SK_OT_USHORT glyphIndex;
1.159 + union Transform {
1.160 + union Matrix {
1.161 + /** !WE_HAVE_A_SCALE & !WE_HAVE_AN_X_AND_Y_SCALE & !WE_HAVE_A_TWO_BY_TWO */
1.162 + struct None { } none;
1.163 + /** WE_HAVE_A_SCALE */
1.164 + struct Scale {
1.165 + SK_OT_F2DOT14 a_d;
1.166 + } scale;
1.167 + /** WE_HAVE_AN_X_AND_Y_SCALE */
1.168 + struct ScaleXY {
1.169 + SK_OT_F2DOT14 a;
1.170 + SK_OT_F2DOT14 d;
1.171 + } scaleXY;
1.172 + /** WE_HAVE_A_TWO_BY_TWO */
1.173 + struct TwoByTwo {
1.174 + SK_OT_F2DOT14 a;
1.175 + SK_OT_F2DOT14 b;
1.176 + SK_OT_F2DOT14 c;
1.177 + SK_OT_F2DOT14 d;
1.178 + } twoByTwo;
1.179 + };
1.180 + /** ARG_1_AND_2_ARE_WORDS & ARGS_ARE_XY_VALUES */
1.181 + struct WordValue {
1.182 + SK_OT_FWORD e;
1.183 + SK_OT_FWORD f;
1.184 + SkOTTableGlyphData::Composite::Component::Transform::Matrix matrix;
1.185 + } wordValue;
1.186 + /** !ARG_1_AND_2_ARE_WORDS & ARGS_ARE_XY_VALUES */
1.187 + struct ByteValue {
1.188 + SK_OT_CHAR e;
1.189 + SK_OT_CHAR f;
1.190 + SkOTTableGlyphData::Composite::Component::Transform::Matrix matrix;
1.191 + } byteValue;
1.192 + /** ARG_1_AND_2_ARE_WORDS & !ARGS_ARE_XY_VALUES */
1.193 + struct WordIndex {
1.194 + SK_OT_USHORT compoundPointIndex;
1.195 + SK_OT_USHORT componentPointIndex;
1.196 + SkOTTableGlyphData::Composite::Component::Transform::Matrix matrix;
1.197 + } wordIndex;
1.198 + /** !ARG_1_AND_2_ARE_WORDS & !ARGS_ARE_XY_VALUES */
1.199 + struct ByteIndex {
1.200 + SK_OT_BYTE compoundPointIndex;
1.201 + SK_OT_BYTE componentPointIndex;
1.202 + SkOTTableGlyphData::Composite::Component::Transform::Matrix matrix;
1.203 + } byteIndex;
1.204 + } transform;
1.205 + } component;//[] last element does not set MORE_COMPONENTS
1.206 +
1.207 + /** Comes after the last Component if the last component has WE_HAVE_INSTR. */
1.208 + struct Instructions {
1.209 + SK_OT_USHORT length;
1.210 + SK_OT_BYTE data[1/*length*/];
1.211 + };
1.212 + };
1.213 +};
1.214 +
1.215 +#pragma pack(pop)
1.216 +
1.217 +#endif
