mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-23 06:57:50 +08:00
632 lines
21 KiB
C
632 lines
21 KiB
C
/* I don't expect anyone to run this program, ever again. It is
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* included primarily as documentation for how the GlyphLessFont was
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* created.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "GlyphLessFont.h"
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#define LITTLE_ENDIAN
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Offset_Table Offsets = {
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#ifdef LITTLE_ENDIAN
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0x00000100, /* sfnt_version */
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0x0A00, /* numTables (10) */
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0x8000, /* searchRange = Max power of 2 <= numTables*16 (128) */
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0x0300, /* entrySelector Log2(searchRange) (3) */
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0x2000, /* rangeShift = numTables*16 - searchRange (160 - 128 = 32) */
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#else
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0x00010000, /* sfnt_version */
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0x000A, /* numTables (10) */
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0x0080, /* searchRange = Max power of 2 <= numTables*16 (128) */
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0x0003, /* entrySelector Log2(searchRange) (3) */
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0x0020, /* rangeShift = numTables*16 - searchRange (160 - 128 = 32) */
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#endif
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};
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head_table head = {
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#ifdef LITTLE_ENDIAN
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0x00000100, /* sfnt_version */
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0x00000100, /* font_version */
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0, /* checksum adjustment */
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0xF53C0F5F, /* Magic number */
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0x0704, /* flags:
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* Bit 0 - 1 - baseline of font at y = 0
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* Bit 1 - 1 - Left sidebearing at x = 0
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* Bit 2 - 0 - instructions not dependent on font size
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* Bit 3 - 1 - force integer ppem
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* Bit 4 - 0 - instructions may not alter advance width
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* Bit 5 - 0 - Not laid out vertically
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* Bit 6 - 0 - required to be 0
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* Bit 7 - 0 - Does not require layout for rendering
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* Bit 8 - 0 - Not an AAT font with metamorphosis
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* Bit 9 - 0 - Not strongly right to left
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* Bit 10 - 0 - Does not require indic-style rearrangements
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* Bit 11 - 0 - Font data is not 'lossless'
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* Bit 12 - 0 - Font not 'covnerted'
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* Bit 13 - 0 - Not optimised for ClearType
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* Bit 14 - 1 - This is a 'last resort' font
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* Bit 15 - 0 - Reserved, must be 0
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*/
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0x0001, /* 16 units per em */
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0x0,0x6EFC9ACF,/* Creation time */
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0x0,0x6EFC9ACF,/* Modified time */
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0, /* xMin */
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0x0080, /* yMin */
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0, /* xMax */
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0x0100, /* yMax */
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0x0000, /* macStyle (none) */
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0x1000, /* Lowest readable size (16 pixels) */
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0x0200, /* font direction (deprecated, should be 2) */
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0, /* index to LOCA format (shorts) */
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0 /* glyph data format (must be 0) */
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#else
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0x00010000, /* afnt version */
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0x00010000, /* font version */
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0, /* checksum adjustment */
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0x5F0F3CF5, /* Magic number */
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0x0407, /* flags:
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* Bit 0 - 1 - baseline of font at y = 0
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* Bit 1 - 1 - Left sidebearing at x = 0
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* Bit 2 - 0 - instructions not dependent on font size
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* Bit 3 - 1 - force integer ppem
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* Bit 4 - 0 - instructions may not alter advance width
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* Bit 5 - 0 - Not laid out vertically
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* Bit 6 - 0 - required to be 0
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* Bit 7 - 0 - Does not require layout for rendering
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* Bit 8 - 0 - Not an AAT font with metamorphosis
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* Bit 9 - 0 - Not strongly right to left
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* Bit 10 - 0 - Does not require indic-style rearrangements
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* Bit 11 - 0 - Font data is not 'lossless'
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* Bit 12 - 0 - Font not 'covnerted'
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* Bit 13 - 0 - Not optimised for ClearType
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* Bit 14 - 1 - This is a 'last resort' font
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* Bit 15 - 0 - Reserved, must be 0
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*/
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0x0100, /* 16 units per em */
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0x0,0xCF9AFC6E,/* Creation time */
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0x0,0xCF9AFC6E,/* Modified time */
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0, /* xMin */
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0xFFFF, /* yMin */
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0, /* xMax */
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0x001, /* yMax */
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0, /* macStyle (none) */
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0x0010, /* Lowest readable size (16 pixels) */
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0x0002, /* font direction (deprecated, should be 2) */
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0, /* index to LOCA format (shorts) */
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0 /* glyph data format (must be 0) */
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#endif
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};
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hhea_table hhea = {
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#ifdef LITTLE_ENDIAN
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0x00000100, /* table version */
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0x0100, /* Ascender */
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#else
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0x00001000, /* table version */
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0x0001, /* Ascender */
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#endif
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0xFFFF, /* Descender */
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0x0000, /* LineGap */
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0x0000, /* AdvanceWidthMax */
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0x0000, /* MinLeftSideBearing */
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0x0000, /* MinRightSideBearing */
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0x0000, /* xMaxExtent */
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#ifdef LITTLE_ENDIAN
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0x0100, /* caretSlopeRise (1 = vertical) */
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#else
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0x0001, /* caretSlopeRise (1 = vertical) */
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#endif
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0x0000, /* caretslopeRun (0 = vertical) */
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0x0000, /* caretOffset */
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0x0000, /* Reserved1 */
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0x0000, /* Reserved2 */
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0x0000, /* Reserved3 */
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0x0000, /* Reserved4 */
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0x0000, /* merticDataFormat (must be 0) */
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#ifdef LITTLE_ENDIAN
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0x0200, /* number of hMetric entries in hmtx */
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#else
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0x0002, /* number of hMetric entries in hmtx */
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#endif
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};
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maxp_table maxp = {
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#ifdef LITTLE_ENDIAN
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0x00000100, /* table version */
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0x0200, /* numGlyphs */
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0x00000000, /* maxPoints */
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0x00000000, /* maxContours */
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0x00000000, /* maxCompositePoints */
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0x00000000, /* maxCompositeContours */
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0x00000100, /* maxZones */
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0x00000000, /* maxTwilightPoints */
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0x00000000, /* maxStorage */
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0x00000000, /* maxFunctionDefs */
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0x00000000, /* maxInstructionDefs */
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0x00000000, /* maxStackElements */
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0x00000000, /* maxSizeOfInstructions */
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0x00000000, /* maxComponentElements */
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0x00000000, /* maxComponentDepth */
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#else
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0x00001000, /* table version */
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0x0002, /* numGlyphs */
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0x00000000, /* maxPoints */
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0x00000000, /* maxContours */
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0x00000000, /* maxCompositePoints */
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0x00000000, /* maxCompositeContours */
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0x00000001, /* maxZones */
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0x00000000, /* maxTwilightPoints */
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0x00000000, /* maxStorage */
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0x00000000, /* maxFunctionDefs */
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0x00000000, /* maxInstructionDefs */
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0x00000000, /* maxStackElements */
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0x00000000, /* maxSizeOfInstructions */
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0x00000000, /* maxComponentElements */
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0x00000000, /* maxComponentDepth */
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#endif
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};
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OS2_table OS2 = {
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#ifdef LITTLE_ENDIAN
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0x0300, /* table version */
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0x0000, /* xAvgCharWidth */
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0x9001, /* usWeight Class (400 = FW_NORMAL) */
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0x0500, /* usWidthClass (5 = FWIDTH_NORMAL) */
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0x0000, /* fsType (0 = no embedding restrictions) */
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0x0000, /* ySubscriptXSize */
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0x0000, /* ySubscriptYSize */
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0x0000, /* ySubscriptXOffset */
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0x0000, /* ySubscriptYOffset */
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0x0000, /* ySuperscriptXSize */
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0x0000, /* ySuperscriptYSize */
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0x0000, /* ySuperscriptXOffset */
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0x0000, /* ySuperscriptYOffset */
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0x0000, /* yStikeoutPosition */
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0x0000, /* sFamilyClass (0 = no classification) */
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0,5,0,1,0,1,0,0,0,0,0, /* PANOSE */
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0x00000000, /* ulUnicodeRanges1 */
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0x00000000, /* ulUnicodeRanges2 */
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0x00000000, /* ulUnicodeRanges3 */
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0x00000000, /* ulUnicodeRanges4 */
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'G', 'O', 'O', 'G', /* achVendID (GOOG = Google) */
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0x4000, /* fsSelection (bit 6 set = regular font) */
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0xFFFF, /* fsFirstCharIndex */
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0x0000, /* fsLastCharIndex */
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0x0100, /* sTypoAscender */
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0xFFFF, /* StypoDescender */
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0x0000, /* STypoLineGap */
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0x0100, /* usWinAscent */
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0x0100, /* usWinDescent */
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0x00000080,/* ulCodePageRange1 */
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0x00000000,/* ulCodePageRange2 */
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0x0000, /* sxHeight */
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0x0000, /* sCapHeight */
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0x0000, /* usDefaultChar */
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0x0100, /* usBreakChar */
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0x0000, /* usMaxContent */
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#else
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0x0003, /* table version */
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0x0000, /* xAvgCharWidth */
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0x0190, /* usWeight Class (400 = FW_NORMAL) */
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0x0005, /* usWidthClass (5 = FWIDTH_NORMAL) */
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0x0000, /* fsType (0 = no embedding restrictions) */
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0x0000, /* ySubscriptXSize */
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0x0000, /* ySubscriptYSize */
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0x0000, /* ySubscriptXOffset */
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0x0000, /* ySubscriptYOffset */
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0x0000, /* ySuperscriptXSize */
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0x0000, /* ySuperscriptYSize */
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0x0000, /* ySuperscriptXOffset */
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0x0000, /* ySuperscriptYOffset */
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0x0000, /* yStikeoutPosition */
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0x0000, /* sFamilyClass (0 = no classification) */
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0,5,0,1,0,1,0,0,0,0,0, /* PANOSE */
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0x00000000,/* ulUnicodeRanges1 */
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0x00000000,/* ulUnicodeRanges2 */
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0x00000000,/* ulUnicodeRanges3 */
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0x00000000,/* ulUnicodeRanges4 */
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'G', 'O', 'O', 'G', /* achVendID (GOOG = Google) */
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0x0040, /* fsSelection (bit 6 set = regular font) */
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0xFFFF, /* fsFirstCharIndex */
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0x0000, /* fsLastCharIndex */
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0x0001, /* sTypoAscender */
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0xFFFF, /* StypoDescender */
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0x0000, /* STypoLineGap */
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0x0001, /* usWinAscent */
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0x0001, /* usWinDescent */
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0x80000000,/* ulCodePageRange1 */
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0x00000000,/* ulCodePageRange2 */
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0x0000, /* sxHeight */
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0x0000, /* sCapHeight */
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0x0000, /* usDefaultChar */
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0x0001, /* usBreakChar */
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0x0000, /* usMaxContent */
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#endif
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};
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hmtx_table hmtx = {
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0x0000, 0x0000,
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0x0000, 0x0000
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};
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cmap_table cmap = {
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0x0000, /* Cmap version (0) */
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#ifdef LITTLE_ENDIAN
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0x0200, /* numTables (2) */
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0x0100, /* Start of first subtable record, platformID = 1 */
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0x0000, /* encodingID = 0 */
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0x14000000, /* Offset of data */
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0x0300, /* Start of second subtable record, platformID = 3 */
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0x0000, /* encodingID = 0 */
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0x20000000, /* Offset of data */
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0x0600, /* STart of Apple table (format 6) */
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0x0C00, /* length of table (12) */
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0x0000, /* Language must be 0 for non-Apple or
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non-specific language */
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0x0000, /* firstCode = 0 */
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0x0100, /* number of codes is 1 */
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0x0000, /* GID is 0 */
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0x0600, /* Start of MS Table (format 4) */
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0x0C00, /* length of table (12) */
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0x0000, /* Language must be 0 for non-Apple or
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non-specific language */
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0x0000, /* firstCode = 0 */
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0x0100, /* number of codes is 1 */
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0x0000, /* GID is 0 */
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#else
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0x0002, /* numTables (2) */
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0x0001,
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0x0000,
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0x00000014,
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0x0003,
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0x0000,
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0x00000020,
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0x0006,
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0x000C,
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0x0000,
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0x0000,
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0x0001,
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0x0000,
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0x0006,
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0x000C,
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0x0000,
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0x0000,
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0x0001,
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0x0000,
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#endif
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};
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/* Changing these strings requires you to change the offset and lengths
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in the name table below */
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char Macnamestring[] = {'V', 'e', 'r', 's', 'i', 'o', 'n', ' ', '1', '.', '0'};
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char Unamestring[] = {0x00, 'V', 0x00, 'e', 0x00, 'r', 0x00, 's', 0x00, 'i',
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0x00, 'o', 0x00, 'n', 0x00, ' ', 0x00, '1', 0x00, '.',
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0x00, '0', 0x00, 0x00, 0x00};
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name_table name = {
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0x0000, /* format 0 */
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#ifdef LITTLE_ENDIAN
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0x0300, /* 3 records */
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0x2A00, /* Offset of string storage */
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0x0000, /* Start of 1st name record, platform = 0 (Unicode) */
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0x0300, /* Platform-specific ID = 0 */
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0x0000, /* Language ID (0 = none) */
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0x0500, /* name ID (5 = version string) */
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0x1600, /* String length */
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0x0B00, /* Offset from start of storage */
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0x0100, /* Start of 2nd name record, platform = 1 (Mac) */
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0x0000,
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0x0000,
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0x0500, /* name ID (5 = version string) */
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0x0B00, /* String length */
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0x0000, /* Offset from start of storage */
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0x0300, /* Start of 3rd name record, platform = 3 */
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0x0100, /* Platform-specific ID = 1 */
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0x0904, /* Language ID (0x409 = US English) */
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0x0500, /* name ID (5 = version string) */
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0x1600, /* String length */
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0x0B00, /* Offset from start of storage */
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#else
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0x0003, /* 3 record2 */
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0x002A, /* Offset of string storage */
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0x0000, /* Start of 1st name record, platform = 0 (Unicode) */
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0x0003, /* Platform-specific ID = 0 */
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0x0000, /* Language ID (0 = none) */
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0x0005, /* name ID (5 = version string) */
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0x0016, /* String length */
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0x000B, /* Offset from start of storage */
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0x0001, /* Start of 2nd name record, platform = 1 (Mac) */
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0x0000,
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0x0000,
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0x0500, /* name ID (5 = version string) */
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0x000B, /* String length */
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0x0000, /* Offset from start of storage */
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0x0003, /* Start of 3rd name record, platform = 3 */
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0x0001, /* Platform-specific ID = 0 */
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0x0409, /* Language ID (0 = none) */
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0x0005, /* name ID (5 = version string) */
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0x0016, /* String length */
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0x000B, /* Offset from start of storage */
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#endif
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};
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post_table post = {
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#ifdef LITTLE_ENDIAN
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0x0100, /* Version (2) */
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#else
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0x0001, /* Version (2) */
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#endif
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0x00000000, /* italicAngle */
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0x0000, /* underlinePosition */
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0x0000, /* underlineThickness */
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#ifdef LITTLE_ENDIAN
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0x01000000, /* isFixedPitch */
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#else
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0x00000001, /* isFixedPitch */
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#endif
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0x00000000, /* minMemType42 */
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0x00000000, /* maxMemType42 */
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0x00000000, /* minMemType1 */
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0x00000000, /* maxMemType1 */
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};
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int main (int argc, char **argv)
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{
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FILE *OutputFile;
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TableRecord Table[10];
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unsigned long offset =
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sizeof(Offset_Table) + (sizeof(TableRecord) * 10),
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length = 0, checksum = 0, HeadTableOffset, Working;
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short fword = -1;
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short loca = 0;
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long glyf = 0;
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unsigned int NameLength, i, FileLength;
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printf("Ken's Glyph-free font creator\n");
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if (argc != 2) {
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fprintf (stderr, "Usage: GlyphLessFont <output filename>\n");
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exit (1);
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}
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OutputFile = fopen (argv[1], "wb+");
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if (OutputFile == 0) {
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fprintf (stderr, "Couldn't open file %s for writing\n", argv[1]);
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exit (1);
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}
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fwrite (&Offsets, sizeof(Offset_Table), 1, OutputFile);
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memset(&Table, 0x00, sizeof(TableRecord) + 10);
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fwrite (&Table, sizeof (TableRecord), 10, OutputFile);
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offset = ftell(OutputFile);
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Table[3].offset = HeadTableOffset = offset;
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/* The whole business of writing a TrueType file is complicated by
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* the way its laid out Firstly there is the fact that it wants
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* the tables to be laid out in alphabetical order, but it wants
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* the actual table data (which the table record points to) to be
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* in quite a different order. Then there's the requirement to
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* have all the table offsets be a multiple of 4 bytes. Finally
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* we have to calculate a checksum for each table as well, which
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* we cna't realistically do until we have written the table data,
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* but which gets stored in the table record at the start of the
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* file.
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*
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* So we start by writing a dumm set of table records, we'll fill
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* in the array as we go and once we've written all the data and
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* worked out the offsets and checksums of all the tables, we'll
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* come back and write the table records into the area we left
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* reserved.
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*/
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fwrite (&head, sizeof(head_table), 1, OutputFile);
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offset = ftell(OutputFile);
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Table[4].offset = offset;
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fwrite (&hhea, sizeof(hhea_table), 1, OutputFile);
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offset = ftell(OutputFile);
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Table[7].offset = offset;
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fwrite (&maxp, sizeof(maxp_table), 1, OutputFile);
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offset = ftell(OutputFile);
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Table[0].offset = offset;
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fwrite (&OS2, sizeof(OS2_table), 1, OutputFile);
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offset = ftell(OutputFile);
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Table[5].offset = offset;
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fwrite (&hmtx, sizeof(hmtx_table), 1, OutputFile);
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offset = ftell(OutputFile);
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Table[1].offset = offset;
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fwrite (&cmap, sizeof(cmap_table), 1, OutputFile);
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offset = ftell(OutputFile);
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Table[6].offset = offset;
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fwrite (&loca, sizeof(short), 1, OutputFile);
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fwrite (&loca, sizeof(short), 1, OutputFile);
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fwrite (&loca, sizeof(short), 1, OutputFile);
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fwrite (&loca, sizeof(short), 1, OutputFile);
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offset = ftell(OutputFile);
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Table[2].offset = offset;
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fwrite (&glyf, sizeof(long), 1, OutputFile);
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offset = ftell(OutputFile);
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Table[8].offset = offset;
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|
|
length = (sizeof(name_table) + sizeof(Macnamestring) +
|
|
sizeof(Unamestring) + 3) / 4;
|
|
length *= 4;
|
|
NameLength = length;
|
|
fwrite (&name, sizeof(name_table), 1, OutputFile);
|
|
fwrite (&Macnamestring, sizeof(Macnamestring), 1, OutputFile);
|
|
fwrite (&Unamestring, NameLength -
|
|
(sizeof(name_table) + sizeof(Macnamestring)), 1, OutputFile);
|
|
offset = ftell(OutputFile);
|
|
Table[9].offset = offset;
|
|
|
|
fwrite (&post, sizeof(post_table), 1, OutputFile);
|
|
FileLength = ftell(OutputFile);
|
|
|
|
Table[3].tag[0] = 'h';
|
|
Table[3].tag[1] = 'e';
|
|
Table[3].tag[2] = 'a';
|
|
Table[3].tag[3] = 'd';
|
|
Table[3].checkSum = 0;
|
|
Table[3].length = sizeof(head_table) - 2; /* Don't count size
|
|
of padding bytes in table */
|
|
|
|
Table[4].tag[0] = 'h';
|
|
Table[4].tag[1] = 'h';
|
|
Table[4].tag[2] = 'e';
|
|
Table[4].tag[3] = 'a';
|
|
Table[4].checkSum = 0;
|
|
Table[4].length = sizeof(hhea_table);
|
|
|
|
Table[7].tag[0] = 'm';
|
|
Table[7].tag[1] = 'a';
|
|
Table[7].tag[2] = 'x';
|
|
Table[7].tag[3] = 'p';
|
|
Table[7].checkSum = 0;
|
|
Table[7].length = sizeof(maxp_table);
|
|
|
|
Table[0].tag[0] = 'O';
|
|
Table[0].tag[1] = 'S';
|
|
Table[0].tag[2] = '/';
|
|
Table[0].tag[3] = '2';
|
|
Table[0].checkSum = 0;
|
|
Table[0].length = sizeof(OS2_table);
|
|
|
|
Table[5].tag[0] = 'h';
|
|
Table[5].tag[1] = 'm';
|
|
Table[5].tag[2] = 't';
|
|
Table[5].tag[3] = 'x';
|
|
Table[5].checkSum = 0;
|
|
Table[5].length = sizeof(hmtx_table);
|
|
|
|
Table[1].tag[0] = 'c';
|
|
Table[1].tag[1] = 'm';
|
|
Table[1].tag[2] = 'a';
|
|
Table[1].tag[3] = 'p';
|
|
Table[1].checkSum = 0;
|
|
Table[1].length = sizeof(cmap_table);
|
|
|
|
Table[6].tag[0] = 'l';
|
|
Table[6].tag[1] = 'o';
|
|
Table[6].tag[2] = 'c';
|
|
Table[6].tag[3] = 'a';
|
|
Table[6].checkSum = 0;
|
|
Table[6].length = sizeof(USHORT) * 3;
|
|
|
|
Table[2].tag[0] = 'g';
|
|
Table[2].tag[1] = 'l';
|
|
Table[2].tag[2] = 'y';
|
|
Table[2].tag[3] = 'f';
|
|
Table[2].checkSum = 0;
|
|
Table[2].length = 1;
|
|
|
|
Table[8].tag[0] = 'n';
|
|
Table[8].tag[1] = 'a';
|
|
Table[8].tag[2] = 'm';
|
|
Table[8].tag[3] = 'e';
|
|
Table[8].checkSum = 0;
|
|
Table[8].length = (sizeof(name_table) +
|
|
sizeof(Macnamestring) +
|
|
sizeof(Unamestring) + 3) / 4;
|
|
Table[8].length *= 4;
|
|
NameLength = Table[8].length;
|
|
|
|
Table[9].tag[0] = 'p';
|
|
Table[9].tag[1] = 'o';
|
|
Table[9].tag[2] = 's';
|
|
Table[9].tag[3] = 't';
|
|
Table[9].checkSum = 0;
|
|
Table[9].length = sizeof(post_table);
|
|
|
|
for (i=0;i<10;i++) {
|
|
ULONG LENGTH, Sum = 0L;
|
|
ULONG *EndPtr, *Data, *Current;
|
|
|
|
offset = Table[i].offset;
|
|
length = Table[i].length;
|
|
LENGTH = (length + 3 & ~3);
|
|
Data = (ULONG *)malloc(LENGTH);
|
|
memset(Data, 0x00, LENGTH);
|
|
fseek(OutputFile, offset, SEEK_SET);
|
|
fread(Data, length, 1, OutputFile);
|
|
|
|
Current = Data;
|
|
EndPtr = Data + (LENGTH / sizeof(ULONG));
|
|
while(Current < EndPtr){
|
|
#ifdef LITTLE_ENDIAN
|
|
Working = *Current++;
|
|
Sum += ((Working & 0xff) << 24) +
|
|
((Working & 0xff00) << 8) +
|
|
((Working & 0xff0000) >> 8) +
|
|
(Working >> 24);
|
|
#else
|
|
Sum += *Current++;
|
|
#endif
|
|
}
|
|
free(Data);
|
|
|
|
#ifdef LITTLE_ENDIAN
|
|
Table[i].offset =
|
|
((offset & 0xff) << 24) +
|
|
((offset & 0xff00) << 8) +
|
|
((offset & 0xff0000) >> 8) +
|
|
(offset >> 24);
|
|
Table[i].length =
|
|
((length & 0xff) << 24) +
|
|
((length & 0xff00) << 8) +
|
|
((length & 0xff0000) >> 8) +
|
|
(length >> 24);
|
|
Table[i].checkSum =
|
|
((Sum & 0xff) << 24) +
|
|
((Sum & 0xff00) << 8) +
|
|
((Sum & 0xff0000) >> 8) +
|
|
(Sum >> 24);
|
|
#else
|
|
Table[i].checkSum = Sum;
|
|
#endif
|
|
}
|
|
|
|
fseek(OutputFile, sizeof(Offset_Table), SEEK_SET);
|
|
fwrite (&Table, sizeof(TableRecord), 10, OutputFile);
|
|
|
|
fseek(OutputFile, 0, SEEK_SET);
|
|
|
|
for (i=0;i < FileLength / sizeof(long);i++) {
|
|
fread(&Working, sizeof(long), 1, OutputFile);
|
|
#ifdef LITTLE_ENDIAN
|
|
checksum += ((Working & 0xff) << 24) +
|
|
((Working & 0xff00) << 8) +
|
|
((Working & 0xff0000) >> 8) +
|
|
(Working >> 24);
|
|
#else
|
|
checksum += Working;
|
|
#endif
|
|
}
|
|
checksum = 0xB1B0AFBA - checksum;
|
|
#ifdef LITTLE_ENDIAN
|
|
head.checkSumAdjustment =
|
|
((checksum & 0xff) << 24) +
|
|
((checksum & 0xff00) << 8) +
|
|
((checksum & 0xff0000) >> 8) +
|
|
(checksum >> 24);
|
|
#else
|
|
head.checkSumAdjustment = checksum;
|
|
#endif
|
|
fseek(OutputFile, HeadTableOffset, SEEK_SET);
|
|
fwrite (&head, sizeof(head_table), 1, OutputFile);
|
|
fclose(OutputFile);
|
|
|
|
return 0;
|
|
}
|