[Pixel]<Imaging>IK>ImagerIKTypefaceImpl.mesa!10

ImagerIKTypefaceImpl.mesa

Plass, January 19, 1987 2:16:22 pm PST

Adams, January 19, 1987 4:23:51 pm PST

Rick Beach, February 4, 1987 12:07:05 pm PST

Subhana Menis, February 10, 1987 5:39:12 pm PST

DIRECTORY CardTable, Imager, ImagerBox, ImagerPath, ImagerFont, IKOps, Rope, ImagerTypeface, RuntimeError, FS;

ImagerIKTypefaceImpl: CEDAR PROGRAM

IMPORTS CardTable, Imager, ImagerBox, IKOps, ImagerTypeface, RuntimeError

~ BEGIN

XChar: TYPE ~ ImagerFont.XChar;

nullXChar: XChar ~ ImagerFont.nullXChar;

VEC: TYPE ~ Imager.VEC;

ROPE: TYPE ~ Rope.ROPE;

IKFontData: TYPE ~ IKOps.IKFontData;

Typeface: TYPE ~ ImagerTypeface.Typeface;

CharCodeMapper: TYPE ~ CardTable.Ref;

Data: TYPE ~ REF DataRep;

DataRep: TYPE ~ RECORD [

ikFontData: IKOps.IKFontData,

charCodeMapper: CharCodeMapper,

unitsPerEm: REAL

];

Ord: PROC [x: XChar] RETURNS [CARDINAL] ~ INLINE {RETURN [x.set*256+x.code]};

IKContains: PROC [self: Typeface, char: XChar] RETURNS [BOOL] ~ {

data: Data ~ NARROW[self.data];

mapped: REF CARDINAL ~ NARROW[CardTable.Fetch[data.charCodeMapper, Ord[char]].val];

RETURN [char = [0, 40B] OR mapped # NIL AND IKOps.Contains[data.ikFontData, mapped^]]

};

IKNextChar: PROC [self: Typeface, char: XChar] RETURNS [XChar] ~ {

Val: PROC [c: CARDINAL] RETURNS [XChar] ~ INLINE {RETURN [[set: c/256, code: c MOD 256]]};

next: XChar ← IF char = nullXChar THEN [0, 0] ELSE Val[Ord[char]+1];

UNTIL next = nullXChar OR IKContains[self, next] DO

next ← Val[Ord[next]+1]

ENDLOOP;

RETURN [next];

};

defaultWidth: VEC ~ [0.5, 0.0];

wordSpaceWidth: VEC ~ [0.3333, 0.0];

IKWidth: PROC [self: Typeface, char: XChar] RETURNS [VEC] ~ {

data: Data ~ NARROW[self.data];

mapped: REF CARDINAL ~ NARROW[CardTable.Fetch[data.charCodeMapper, Ord[char]].val];

IF char = [0, 40B] THEN {

RETURN [wordSpaceWidth]

};

IF mapped # NIL AND IKOps.Contains[data.ikFontData, mapped^] THEN {

charInfo: IKOps.CharacterInfo ~ IKOps.GetCharacterInfo[data.ikFontData, mapped^];

RETURN [[x: charInfo.totalSetWidth/data.unitsPerEm, y: 0.0]]

};

RETURN [defaultWidth];

};

IKAmplified: PROC [self: Typeface, char: XChar] RETURNS [BOOL] ~ {

IF char = [0, 40B] THEN RETURN [TRUE];

RETURN [FALSE]

};

IKCorrection: PROC [self: Typeface, char: XChar] RETURNS [ImagerFont.CorrectionType] ~ {

IF char = [0, 40B] THEN RETURN [space];

RETURN [mask]

};

IKBoundingBox: PROC [self: Typeface, char: XChar] RETURNS [ImagerFont.Extents] ~ {

data: Data ~ NARROW[self.data];

mapped: REF CARDINAL ~ NARROW[CardTable.Fetch[data.charCodeMapper, Ord[char]].val];

IF mapped # NIL AND IKOps.Contains[data.ikFontData, mapped^] THEN {

charInfo: IKOps.CharacterInfo ~ IKOps.GetCharacterInfo[data.ikFontData, mapped^];

xMin: REAL ~ (charInfo.xMin+charInfo.leftSideBearing)/data.unitsPerEm;

xMax: REAL ~ (charInfo.xMax+charInfo.leftSideBearing)/data.unitsPerEm;

yMin: REAL ~ (charInfo.yMin)/data.unitsPerEm;

yMax: REAL ~ (charInfo.yMax)/data.unitsPerEm;

RETURN [ImagerBox.ExtentsFromBox[[xmin: xMin, ymin: yMin, xmax: xMax, ymax: yMax]]]

};

RETURN [[leftExtent: -0.05, rightExtent: 0.45, descent: 0, ascent: 0.6]];

};

IKFontBoundingBox: PROC [self: Typeface] RETURNS [ImagerFont.Extents] ~ {

data: Data ~ NARROW[self.data];

bb: ImagerBox.Box ← [xmin: 0.05, ymin: 0, xmax: 0.45, ymax: 0.6];

Action: PROC [characterCode: CARDINAL, byteOffsetOfCharacterData: INT] ~ {

charInfo: IKOps.CharacterInfo ~ IKOps.GetCharacterInfo[data.ikFontData, characterCode];

xMin: REAL ~ (charInfo.xMin+charInfo.leftSideBearing)/data.unitsPerEm;

xMax: REAL ~ (charInfo.xMax+charInfo.leftSideBearing)/data.unitsPerEm;

yMin: REAL ~ (charInfo.yMin)/data.unitsPerEm;

yMax: REAL ~ (charInfo.yMax)/data.unitsPerEm;

bb ← ImagerBox.BoundingBox[bb, [xmin: xMin, ymin: yMin, xmax: xMax, ymax: yMax]];

};

IKOps.EnumerateCharacters[data.ikFontData, Action];

RETURN [ImagerBox.ExtentsFromBox[bb]];

};

IKLigature: PROC [self: Typeface, char, successor: XChar] RETURNS [XChar] ~ {

RETURN[nullXChar];

};

IKNextLigature: PROC [self: Typeface, char, successor: XChar] RETURNS [XChar] ~ {

RETURN[nullXChar];

};

IKKern: PROC [self: Typeface, char, successor: XChar] RETURNS [VEC] ~ {

RETURN[[0, 0]];

};

IKNextKern: PROC [self: Typeface, char, successor: XChar] RETURNS [XChar] ~ {

RETURN[nullXChar];

};

IKMask: PROC [self: Typeface, char: XChar, context: Imager.Context] ~ {

data: Data ~ NARROW[self.data];

mapped: REF CARDINAL ~ NARROW[CardTable.Fetch[data.charCodeMapper, Ord[char]].val];

IF mapped # NIL AND IKOps.Contains[data.ikFontData, mapped^] THEN {

path: ImagerPath.PathProc ~ {

IKOps.GetPath[data.ikFontData, mapped^, moveTo, lineTo, curveTo];

};

charInfo: IKOps.CharacterInfo ~ IKOps.GetCharacterInfo[data.ikFontData, mapped^];

Imager.ScaleT[context, 1.0/data.unitsPerEm];

Imager.TranslateT[context, [x: charInfo.xMin+charInfo.leftSideBearing, y: charInfo.yMin]];

Imager.MaskFill[context: context, path: path, parity: TRUE];

RETURN;

};

IF char # [0, 40B] THEN Imager.MaskBox[context, [xmin: 0.05, ymin: 0.0, xmax: 0.45, ymax: 0.6]];

};

ikClass: ImagerTypeface.TypefaceClass ~ NEW[ImagerTypeface.TypefaceClassRep ← [

type: $IkarusFont,

Contains: IKContains,

NextChar: IKNextChar,

Width: IKWidth,

Amplified: IKAmplified,

Correction: IKCorrection,

BoundingBox: IKBoundingBox,

FontBoundingBox: IKFontBoundingBox,

Ligature: IKLigature,

NextLigature: IKNextLigature,

Kern: IKKern,

NextKern: IKNextKern,

Mask: IKMask

]];

FindCharCodeMapper: PROC [ikFontData: IKFontData] RETURNS [CharCodeMapper] ~ {

RETURN [bigelowAndHolmesCharCodeMapper] -- for now

};

FindUnitsPerEm: PROC [ikFontData: IKFontData] RETURNS [REAL] ~ {

IF ikFontData.bodySize # 0.0 THEN RETURN [ikFontData.bodySize];

RETURN [16800.0] -- for now

};

bigelowAndHolmesCharCodeMapper: CharCodeMapper ~ MakeBigelowAndHolmesCharCodeMapper[];

MakeBigelowAndHolmesCharCodeMapper: PROC RETURNS [CharCodeMapper] ~ {

c: CardTable.Ref ~ CardTable.Create[199];

C: PROC [xSet: [0B..377B), xChar: [0B..377B), bChar: CARDINAL] ~ {

[] ← CardTable.Store[c, xSet*256+xChar, NEW[CARDINAL ← bChar]];

};

C[xSet: 0B, xChar: 101B, bChar: 101];

C[xSet: 0B, xChar: 102B, bChar: 102];

C[xSet: 0B, xChar: 103B, bChar: 103];

C[xSet: 0B, xChar: 104B, bChar: 104];

C[xSet: 0B, xChar: 105B, bChar: 105];

C[xSet: 0B, xChar: 106B, bChar: 106];

C[xSet: 0B, xChar: 107B, bChar: 107];

C[xSet: 0B, xChar: 110B, bChar: 108];

C[xSet: 0B, xChar: 111B, bChar: 109];

C[xSet: 0B, xChar: 112B, bChar: 110];

C[xSet: 0B, xChar: 113B, bChar: 111];

C[xSet: 0B, xChar: 114B, bChar: 112];

C[xSet: 0B, xChar: 115B, bChar: 113];

C[xSet: 0B, xChar: 116B, bChar: 114];

C[xSet: 0B, xChar: 117B, bChar: 115];

C[xSet: 0B, xChar: 120B, bChar: 116];

C[xSet: 0B, xChar: 121B, bChar: 117];

C[xSet: 0B, xChar: 122B, bChar: 118];

C[xSet: 0B, xChar: 123B, bChar: 119];

C[xSet: 0B, xChar: 124B, bChar: 120];

C[xSet: 0B, xChar: 125B, bChar: 121];

C[xSet: 0B, xChar: 126B, bChar: 122];

C[xSet: 0B, xChar: 127B, bChar: 123];

C[xSet: 0B, xChar: 130B, bChar: 124];

C[xSet: 0B, xChar: 131B, bChar: 125];

C[xSet: 0B, xChar: 132B, bChar: 126];

C[xSet: 0B, xChar: 341B, bChar: 127];

C[xSet: 0B, xChar: 352B, bChar: 128];

C[xSet: 0B, xChar: 351B, bChar: 129];

C[xSet: 0B, xChar: 350B, bChar: 130];

C[xSet: 46B, xChar: 131B, bChar: 139];

C[xSet: 46B, xChar: 104B, bChar: 140];

C[xSet: 46B, xChar: 105B, bChar: 141];

C[xSet: 46B, xChar: 113B, bChar: 142];

C[xSet: 46B, xChar: 116B, bChar: 143];

C[xSet: 46B, xChar: 121B, bChar: 144];

C[xSet: 46B, xChar: 123B, bChar: 145];

C[xSet: 46B, xChar: 126B, bChar: 146];

C[xSet: 46B, xChar: 132B, bChar: 147];

C[xSet: 46B, xChar: 134B, bChar: 148];

C[xSet: 46B, xChar: 135B, bChar: 149];

C[xSet: 0B, xChar: 140B, bChar: 150];

C[xSet: 0B, xChar: 301B, bChar: 150];

C[xSet: 0B, xChar: 5B, bChar: 150]; --temporary substitution for Subhana

C[xSet: 0B, xChar: 302B, bChar: 151];

C[xSet: 0B, xChar: 13B, bChar: 151]; --temporary substitution for Subhana

C[xSet: 0B, xChar: 136B, bChar: 152];

C[xSet: 0B, xChar: 303B, bChar: 152];

C[xSet: 0B, xChar: 317B, bChar: 153];

C[xSet: 0B, xChar: 312B, bChar: 154];

C[xSet: 0B, xChar: 307B, bChar: 155];

C[xSet: 0B, xChar: 310B, bChar: 156];

C[xSet: 0B, xChar: 176B, bChar: 157];

C[xSet: 0B, xChar: 305B, bChar: 157];

C[xSet: 0B, xChar: 304B, bChar: 158];

C[xSet: 0B, xChar: 306B, bChar: 159];

C[xSet: 0B, xChar: 315B, bChar: 160];

C[xSet: 0B, xChar: 316B, bChar: 161];

C[xSet: 0B, xChar: 313B, bChar: 170];

C[xSet: 361B, xChar: 55B, bChar: 270];

C[xSet: 0B, xChar: 141B, bChar: 301];

C[xSet: 0B, xChar: 142B, bChar: 302];

C[xSet: 0B, xChar: 143B, bChar: 303];

C[xSet: 0B, xChar: 144B, bChar: 304];

C[xSet: 0B, xChar: 145B, bChar: 305];

C[xSet: 0B, xChar: 146B, bChar: 306];

C[xSet: 0B, xChar: 147B, bChar: 307];

C[xSet: 0B, xChar: 150B, bChar: 308];

C[xSet: 0B, xChar: 151B, bChar: 309];

C[xSet: 0B, xChar: 152B, bChar: 310];

C[xSet: 0B, xChar: 153B, bChar: 311];

C[xSet: 0B, xChar: 154B, bChar: 312];

C[xSet: 0B, xChar: 155B, bChar: 313];

C[xSet: 0B, xChar: 156B, bChar: 314];

C[xSet: 0B, xChar: 157B, bChar: 315];

C[xSet: 0B, xChar: 160B, bChar: 316];

C[xSet: 0B, xChar: 161B, bChar: 317];

C[xSet: 0B, xChar: 162B, bChar: 318];

C[xSet: 0B, xChar: 163B, bChar: 319];

C[xSet: 0B, xChar: 164B, bChar: 320];

C[xSet: 0B, xChar: 165B, bChar: 321];

C[xSet: 0B, xChar: 166B, bChar: 322];

C[xSet: 0B, xChar: 167B, bChar: 323];

C[xSet: 0B, xChar: 170B, bChar: 324];

C[xSet: 0B, xChar: 171B, bChar: 325];

C[xSet: 0B, xChar: 172B, bChar: 326];

C[xSet: 0B, xChar: 361B, bChar: 327];

C[xSet: 0B, xChar: 372B, bChar: 328];

C[xSet: 0B, xChar: 371B, bChar: 329];

C[xSet: 0B, xChar: 373B, bChar: 330];

C[xSet: 360B, xChar: 41B, bChar: 331];

C[xSet: 360B, xChar: 44B, bChar: 332];

C[xSet: 360B, xChar: 45B, bChar: 333];

C[xSet: 360B, xChar: 42B, bChar: 334];

C[xSet: 360B, xChar: 43B, bChar: 335];

C[xSet: 0B, xChar: 365B, bChar: 336];

C[xSet: 0B, xChar: 370B, bChar: 337];

C[xSet: 0B, xChar: 345B, bChar: 338];

C[xSet: ???B, xChar: ???B, bChar: 350 ??? lower case accents??];

C[xSet: ???B, xChar: ???B, bChar: 351 ???];

C[xSet: ???B, xChar: ???B, bChar: 352 ???];

C[xSet: ???B, xChar: ???B, bChar: 353 ???];

C[xSet: ???B, xChar: ???B, bChar: 354 ???];

C[xSet: ???B, xChar: ???B, bChar: 355 ???];

C[xSet: ???B, xChar: ???B, bChar: 356 ???];

C[xSet: ???B, xChar: ???B, bChar: 357 ???];

C[xSet: ???B, xChar: ???B, bChar: 358 ???];

C[xSet: ???B, xChar: ???B, bChar: 359 ???];

C[xSet: ???B, xChar: ???B, bChar: 360 ???];

C[xSet: ???B, xChar: ???B, bChar: 361 ???];

C[xSet: ???B, xChar: ???B, bChar: 370 ???];

C[xSet: 361B, xChar: 255B, bChar: 470];

C[xSet: 0B, xChar: 60B, bChar: 500];

C[xSet: 0B, xChar: 61B, bChar: 501];

C[xSet: 0B, xChar: 62B, bChar: 502];

C[xSet: 0B, xChar: 63B, bChar: 503];

C[xSet: 0B, xChar: 64B, bChar: 504];

C[xSet: 0B, xChar: 65B, bChar: 505];

C[xSet: 0B, xChar: 66B, bChar: 506];

C[xSet: 0B, xChar: 67B, bChar: 507];

C[xSet: 0B, xChar: 70B, bChar: 508];

C[xSet: 0B, xChar: 71B, bChar: 509];

C[xSet: 357B, xChar: 260B, bChar: 520];

C[xSet: 357B, xChar: 261B, bChar: 521];

C[xSet: 0B, xChar: 321B, bChar: 521];

C[xSet: 357B, xChar: 262B, bChar: 522];

C[xSet: 0B, xChar: 262B, bChar: 522];

C[xSet: 357B, xChar: 263B, bChar: 523];

C[xSet: 0B, xChar: 263B, bChar: 523];

C[xSet: 357B, xChar: 264B, bChar: 524];

C[xSet: 357B, xChar: 265B, bChar: 525];

C[xSet: 357B, xChar: 266B, bChar: 526];

C[xSet: 357B, xChar: 267B, bChar: 527];

C[xSet: 357B, xChar: 270B, bChar: 528];

C[xSet: 357B, xChar: 271B, bChar: 529];

C[xSet: 0B, xChar: 275B, bChar: 540];

C[xSet: 0B, xChar: 274B, bChar: 542];

C[xSet: 357B, xChar: 257B, bChar: 545];

C[xSet: 357B, xChar: 241B, bChar: 570];

C[xSet: 357B, xChar: 245B, bChar: 576];

C[xSet: 0B, xChar: 56B, bChar: 600];

C[xSet: 0B, xChar: 72B, bChar: 601];

C[xSet: 0B, xChar: 54B, bChar: 602];

C[xSet: 0B, xChar: 73B, bChar: 603];

C[xSet: 0B, xChar: 251B, bChar: 604];

C[xSet: 0B, xChar: 140B, bChar: 604]; --temporary substitution for Subhana

C[xSet: 0B, xChar: 47B, bChar: 605];

C[xSet: 0B, xChar: 271B, bChar: 605];

C[xSet: 0B, xChar: 252B, bChar: 606];

C[xSet: 0B, xChar: 42B, bChar: 607];

C[xSet: 0B, xChar: 272B, bChar: 607];

C[xSet: 357B, xChar: 50B, bChar: 608];

C[xSet: 0B, xChar: 41B, bChar: 609];

C[xSet: 0B, xChar: 241B, bChar: 610];

C[xSet: 0B, xChar: 77B, bChar: 611];

C[xSet: 0B, xChar: 277B, bChar: 612];

C[xSet: 43B, xChar: 262B, bChar: 613];

C[xSet: 0B, xChar: 134B, bChar: 620];

C[xSet: 0B, xChar: 57B, bChar: 621];

C[xSet: 0B, xChar: 50B, bChar: 622];

C[xSet: 0B, xChar: 51B, bChar: 623];

C[xSet: 0B, xChar: 133B, bChar: 624];

C[xSet: 0B, xChar: 135B, bChar: 625];

C[xSet: 0B, xChar: 173B, bChar: 626];

C[xSet: 0B, xChar: 175B, bChar: 627];

C[xSet: 357B, xChar: 52B, bChar: 628];

C[xSet: 357B, xChar: 53B, bChar: 629];

C[xSet: 0B, xChar: 253B, bChar: 630];

C[xSet: 0B, xChar: 273B, bChar: 631];

C[xSet: 357B, xChar: 60B, bChar: 650];

C[xSet: 357B, xChar: 61B, bChar: 651];

C[xSet: 0B, xChar: 247B, bChar: 652];

C[xSet: 0B, xChar: 266B, bChar: 653];

C[xSet: 41B, xChar: 76B, bChar: 670];

C[xSet: 357B, xChar: 44B, bChar: 671];

C[xSet: 0B, xChar: 55B, bChar: 671]; -- neutral

C[xSet: 0B, xChar: 30B, bChar: 671]; --temporary substitution for Subhana

C[xSet: 0B, xChar: 55B, bChar: 670]; --temporary substitution for Subhana

C[xSet: 357B, xChar: 45B, bChar: 672];

C[xSet: 0B, xChar: 137B, bChar: 673];

C[xSet: 0B, xChar: 137B, bChar: 672]; -- questionable duplication

C[xSet: 0B, xChar: 52B, bChar: 674];

C[xSet: 0B, xChar: 174B, bChar: 675];

C[xSet: 0B, xChar: 244B, bChar: 700];

C[xSet: 0B, xChar: 242B, bChar: 701];

C[xSet: 0B, xChar: 243B, bChar: 702];

C[xSet: 0B, xChar: 245B, bChar: 703];

C[xSet: 357B, xChar: 242B, bChar: 704];

C[xSet: 0B, xChar: 44B, bChar: 705];

C[xSet: 0B, xChar: 44B, bChar: 700]; --(questionable duplication)

C[xSet: 0B, xChar: 43B, bChar: 710];

C[xSet: 0B, xChar: 45B, bChar: 711];

C[xSet: 0B, xChar: 260B, bChar: 712];

C[xSet: 0B, xChar: 323B, bChar: 713];

C[xSet: 0B, xChar: 100B, bChar: 714];

C[xSet: 0B, xChar: 46B, bChar: 715];

C[xSet: 0B, xChar: 265B, bChar: 716];

C[xSet: 0B, xChar: 322B, bChar: 717];

C[xSet: 0B, xChar: 324B, bChar: 718];

C[xSet: ???B, xChar: ???B, bChar: 719 ???];

C[xSet: ???B, xChar: ???B, bChar: 720 ???];

C[xSet: 357B, xChar: 0B, bChar: 721];

C[xSet: 357B, xChar: 146B, bChar: 722];

C[xSet: ???B, xChar: ???B, bChar: 724 ??? three dots in a row??];

C[xSet: 0B, xChar: 53B, bChar: 750];

C[xSet: 365B, xChar: 55B, bChar: 751]; -- (minus sign code)

C[xSet: 0B, xChar: 75B, bChar: 752];

C[xSet: 0B, xChar: 261B, bChar: 753];

C[xSet: 0B, xChar: 74B, bChar: 754];

C[xSet: 0B, xChar: 76B, bChar: 755];

C[xSet: 356B, xChar: 176B, bChar: 756];

C[xSet: 357B, xChar: 266B, bChar: 757];

C[xSet: 0B, xChar: 267B, bChar: 758];

C[xSet: ???B, xChar: ???B, bChar: 759 ??? prime?? another name for this??];

C[xSet: 0B, xChar: 264B, bChar: 760];

C[xSet: 0B, xChar: 270B, bChar: 761];

C[xSet: 41B, xChar: 142B, bChar: 762];

RETURN [c]

};

IKCreator: ImagerTypeface.CreateProc ~ {

PROC [file: FS.OpenFile] RETURNS [Typeface]

ikFontData: IKOps.IKFontData ← NIL;

ikFontData ← IKOps.OpenFromOpenFile[file ! RuntimeError.UNCAUGHT => CONTINUE];

IF ikFontData = NIL THEN ERROR Imager.Error[[$formatError, "Format error in IK font file"]];

RETURN [NEW[ImagerTypeface.TypefaceRep ← [

class: ikClass,

data: NEW [DataRep ← [ikFontData, FindCharCodeMapper[ikFontData], FindUnitsPerEm[ikFontData]]]

]]];

};

ImagerTypeface.Register[extension: "ik", create: IKCreator];

END.