michael@0: /*
michael@0:  * Copyright 2012 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef SkOTTable_head_DEFINED
michael@0: #define SkOTTable_head_DEFINED
michael@0: 
michael@0: #include "SkEndian.h"
michael@0: #include "SkOTTableTypes.h"
michael@0: #include "SkTypedEnum.h"
michael@0: 
michael@0: #pragma pack(push, 1)
michael@0: 
michael@0: struct SkOTTableHead {
michael@0:     static const SK_OT_CHAR TAG0 = 'h';
michael@0:     static const SK_OT_CHAR TAG1 = 'e';
michael@0:     static const SK_OT_CHAR TAG2 = 'a';
michael@0:     static const SK_OT_CHAR TAG3 = 'd';
michael@0:     static const SK_OT_ULONG TAG = SkOTTableTAG<SkOTTableHead>::value;
michael@0: 
michael@0:     SK_OT_Fixed version;
michael@0:     static const SK_OT_Fixed version1 = SkTEndian_SwapBE32(0x00010000);
michael@0:     SK_OT_Fixed fontRevision;
michael@0:     static const uint32_t fontChecksum = 0xB1B0AFBA; //checksum of all TT fonts
michael@0:     SK_OT_ULONG checksumAdjustment;
michael@0:     SK_OT_ULONG magicNumber;
michael@0:     static const SK_OT_ULONG magicNumberConst = SkTEndian_SwapBE32(0x5F0F3CF5);
michael@0:     union Flags {
michael@0:         struct Field {
michael@0:             //8-15
michael@0:             SK_OT_BYTE_BITFIELD(
michael@0:                 GXMetamorphosis_Apple,
michael@0:                 HasStrongRTL_Apple,
michael@0:                 HasIndicStyleRearrangement,
michael@0:                 AgfaMicroTypeExpressProcessed,
michael@0:                 FontConverted,
michael@0:                 DesignedForClearType,
michael@0:                 LastResort,
michael@0:                 Reserved15)
michael@0:             //0-7
michael@0:             SK_OT_BYTE_BITFIELD(
michael@0:                 BaselineAtY0,
michael@0:                 LeftSidebearingAtX0,
michael@0:                 InstructionsDependOnPointSize,
michael@0:                 IntegerScaling,
michael@0:                 InstructionsAlterAdvanceWidth,
michael@0:                 VerticalCenteredGlyphs_Apple,
michael@0:                 Reserved06,
michael@0:                 RequiresLayout_Apple)
michael@0:         } field;
michael@0:         struct Raw {
michael@0:             static const SK_OT_USHORT BaselineAtY0Mask = SkTEndian_SwapBE16(1 << 0);
michael@0:             static const SK_OT_USHORT LeftSidebearingAtX0Mask = SkTEndian_SwapBE16(1 << 1);
michael@0:             static const SK_OT_USHORT InstructionsDependOnPointSizeMask = SkTEndian_SwapBE16(1 << 2);
michael@0:             static const SK_OT_USHORT IntegerScalingMask = SkTEndian_SwapBE16(1 << 3);
michael@0:             static const SK_OT_USHORT InstructionsAlterAdvanceWidthMask = SkTEndian_SwapBE16(1 << 4);
michael@0:             static const SK_OT_USHORT VerticalCenteredGlyphs_AppleMask = SkTEndian_SwapBE16(1 << 5);
michael@0:             //Reserved
michael@0:             static const SK_OT_USHORT RequiresLayout_AppleMask = SkTEndian_SwapBE16(1 << 7);
michael@0: 
michael@0:             static const SK_OT_USHORT GXMetamorphosis_AppleMask = SkTEndian_SwapBE16(1 << 8);
michael@0:             static const SK_OT_USHORT HasStrongRTL_AppleMask = SkTEndian_SwapBE16(1 << 9);
michael@0:             static const SK_OT_USHORT HasIndicStyleRearrangementMask = SkTEndian_SwapBE16(1 << 10);
michael@0:             static const SK_OT_USHORT AgfaMicroTypeExpressProcessedMask = SkTEndian_SwapBE16(1 << 11);
michael@0:             static const SK_OT_USHORT FontConvertedMask = SkTEndian_SwapBE16(1 << 12);
michael@0:             static const SK_OT_USHORT DesignedForClearTypeMask = SkTEndian_SwapBE16(1 << 13);
michael@0:             static const SK_OT_USHORT LastResortMask = SkTEndian_SwapBE16(1 << 14);
michael@0:             //Reserved
michael@0:             SK_OT_USHORT value;
michael@0:         } raw;
michael@0:     } flags;
michael@0:     SK_OT_USHORT unitsPerEm;
michael@0:     SK_OT_LONGDATETIME created;
michael@0:     SK_OT_LONGDATETIME modified;
michael@0:     SK_OT_SHORT xMin;
michael@0:     SK_OT_SHORT yMin;
michael@0:     SK_OT_SHORT xMax;
michael@0:     SK_OT_SHORT yMax;
michael@0:     union MacStyle {
michael@0:         struct Field {
michael@0:             //8-15
michael@0:             SK_OT_BYTE_BITFIELD(
michael@0:                 Reserved08,
michael@0:                 Reserved09,
michael@0:                 Reserved10,
michael@0:                 Reserved11,
michael@0:                 Reserved12,
michael@0:                 Reserved13,
michael@0:                 Reserved14,
michael@0:                 Reserved15)
michael@0:             //0-7
michael@0:             SK_OT_BYTE_BITFIELD(
michael@0:                 Bold,
michael@0:                 Italic,
michael@0:                 Underline,
michael@0:                 Outline,
michael@0:                 Shadow,
michael@0:                 Condensed,
michael@0:                 Extended,
michael@0:                 Reserved07)
michael@0:         } field;
michael@0:         struct Raw {
michael@0:             static const SK_OT_USHORT BoldMask = SkTEndian_SwapBE16(1);
michael@0:             static const SK_OT_USHORT ItalicMask = SkTEndian_SwapBE16(1 << 1);
michael@0:             static const SK_OT_USHORT UnderlineMask = SkTEndian_SwapBE16(1 << 2);
michael@0:             static const SK_OT_USHORT OutlineMask = SkTEndian_SwapBE16(1 << 3);
michael@0:             static const SK_OT_USHORT ShadowMask = SkTEndian_SwapBE16(1 << 4);
michael@0:             static const SK_OT_USHORT CondensedMask = SkTEndian_SwapBE16(1 << 5);
michael@0:             static const SK_OT_USHORT ExtendedMask = SkTEndian_SwapBE16(1 << 6);
michael@0: 
michael@0:             SK_OT_USHORT value;
michael@0:         } raw;
michael@0:     } macStyle;
michael@0:     SK_OT_USHORT lowestRecPPEM;
michael@0:     struct FontDirectionHint {
michael@0:         SK_TYPED_ENUM(Value, SK_OT_SHORT,
michael@0:             ((FullyMixedDirectionalGlyphs, SkTEndian_SwapBE16(0)))
michael@0:             ((OnlyStronglyLTR, SkTEndian_SwapBE16(1)))
michael@0:             ((StronglyLTR, SkTEndian_SwapBE16(2)))
michael@0:             ((OnlyStronglyRTL, static_cast<SK_OT_SHORT>(SkTEndian_SwapBE16((uint16_t)-1))))
michael@0:             ((StronglyRTL, static_cast<SK_OT_SHORT>(SkTEndian_SwapBE16((uint16_t)-2))))
michael@0:             SK_SEQ_END,
michael@0:         (value)SK_SEQ_END)
michael@0:     } fontDirectionHint;
michael@0:     struct IndexToLocFormat {
michael@0:         SK_TYPED_ENUM(Value, SK_OT_SHORT,
michael@0:             ((ShortOffsets, SkTEndian_SwapBE16(0)))
michael@0:             ((LongOffsets, SkTEndian_SwapBE16(1)))
michael@0:             SK_SEQ_END,
michael@0:         (value)SK_SEQ_END)
michael@0:     } indexToLocFormat;
michael@0:     struct GlyphDataFormat {
michael@0:         SK_TYPED_ENUM(Value, SK_OT_SHORT,
michael@0:             ((CurrentFormat, SkTEndian_SwapBE16(0)))
michael@0:             SK_SEQ_END,
michael@0:         (value)SK_SEQ_END)
michael@0:     } glyphDataFormat;
michael@0: };
michael@0: 
michael@0: #pragma pack(pop)
michael@0: 
michael@0: 
michael@0: #include <stddef.h>
michael@0: SK_COMPILE_ASSERT(offsetof(SkOTTableHead, glyphDataFormat) == 52, SkOTTableHead_glyphDataFormat_not_at_52);
michael@0: SK_COMPILE_ASSERT(sizeof(SkOTTableHead) == 54, sizeof_SkOTTableHead_not_54);
michael@0: 
michael@0: #endif