DIRECTORY
ImagerTransform,
Font,
Real USING [MinusZero, SqRt],
RefText USING [ObtainScratch, ReleaseScratch],
Rope USING [FromRefText, ROPE],
UFTfm,
UFFileManager USING [FontFile, GetData, InBounds, InitProc, Open, Pointer],
UFTfmReader;
UFTfmReaderImpl: CEDAR PROGRAM
IMPORTS ImagerTransform, Font, Real, RefText, Rope, UFTfm, UFFileManager
EXPORTS UFTfmReader =
BEGIN OPEN UFTfmReader;
TwoToTheTenth: INT = 2*2*2*2*2 * 2*2*2*2*2;
TwoToTheTwentieth: INT = TwoToTheTenth*TwoToTheTenth;
RealTwoToTheTwentieth: REAL = TwoToTheTwentieth;
FixedToReal: PROCEDURE [x: UFTfm.Fixed] RETURNS [REAL] =
{RETURN[UFTfm.Long[x]/RealTwoToTheTwentieth]};
Ord: PROCEDURE [c: CHAR] RETURNS [[0..256)] = INLINE {RETURN[LOOPHOLE[c]]};
Data: TYPE = REF DataRec;
DataRec: TYPE = RECORD [
characterCodingScheme: Rope.ROPE,
family: Rope.ROPE,
dirPtr: LONG POINTER TO UFTfm.Directory,
headerPtr: LONG POINTER TO UFTfm.Header,
fInfoDesc: LONG DESCRIPTOR FOR ARRAY OF UFTfm.FInfoEntry,
widthDesc: LONG DESCRIPTOR FOR ARRAY OF UFTfm.Fixed,
heightDesc: LONG DESCRIPTOR FOR ARRAY OF UFTfm.Fixed,
depthDesc: LONG DESCRIPTOR FOR ARRAY OF UFTfm.Fixed,
charIcDesc: LONG DESCRIPTOR FOR ARRAY OF UFTfm.Fixed,
ligKernDesc: LONG DESCRIPTOR FOR ARRAY OF UFTfm.LigKernEntry,
kernDesc: LONG DESCRIPTOR FOR ARRAY OF UFTfm.Fixed,
extenDesc: LONG DESCRIPTOR FOR ARRAY OF UFTfm.ExtRecipe,
paramPtr: LONG POINTER TO UFTfm.Param
];
OpenInit: UFFileManager.InitProc = TRUSTED {
base: LONG POINTER _ fontFile.Pointer[];
dir: LONG POINTER TO UFTfm.Directory _ base;
data: Data _ NEW[DataRec];
curPtr: LONG POINTER _ base;
Next: UNSAFE PROC [size: NAT] RETURNS [p: LONG POINTER] = UNCHECKED {p _ curPtr; curPtr _ curPtr + size};
s: NAT = SIZE[UFTfm.Word];
IF NOT fontFile.InBounds[dir, SIZE[UFTfm.Directory]] THEN
ERROR Font.BadFontFileFormat;
IF NOT UFTfm.ValidDirectory[dir^] THEN
ERROR Font.BadFontFileFormat;
IF NOT fontFile.InBounds[base, dir.lf] THEN
ERROR Font.BadFontFileFormat;
data.dirPtr _ Next[SIZE[UFTfm.Directory]];
data.headerPtr _ Next[s*dir.lh];
data.fInfoDesc _ DESCRIPTOR[Next[s*(dir.ec-dir.bc+1)], s*(dir.ec-dir.bc+1)];
data.widthDesc _ DESCRIPTOR[Next[s*dir.nw], s*dir.nw];
data.heightDesc _ DESCRIPTOR[Next[s*dir.nh], s*dir.nh];
data.depthDesc _ DESCRIPTOR[Next[s*dir.nd], s*dir.nd];
data.charIcDesc _ DESCRIPTOR[Next[s*dir.ni], s*dir.ni];
data.ligKernDesc _ DESCRIPTOR[Next[s*dir.nl], s*dir.nl];
data.kernDesc _ DESCRIPTOR[Next[s*dir.nk], s*dir.nk];
data.extenDesc _ DESCRIPTOR[Next[s*dir.ne], s*dir.ne];
data.paramPtr _ Next[s*dir.np];
BEGIN
temp: REF TEXT _ RefText.ObtainScratch[40];
temp.length _ Ord[data.headerPtr.characterCodingScheme[0]];
FOR i: NAT IN [0..temp.length) DO
temp[i] _ data.headerPtr.characterCodingScheme[i+1];
ENDLOOP;
data.characterCodingScheme _ Rope.FromRefText[temp];
temp.length _ Ord[data.headerPtr.externalFontIdentifier[0]];
FOR i: NAT IN [0..temp.length) DO
temp[i] _ data.headerPtr.externalFontIdentifier[i+1];
ENDLOOP;
data.family _ Rope.FromRefText[temp];
RefText.ReleaseScratch[temp];
END;
RETURN[data];
};
CheckSum: PUBLIC PROCEDURE [key: Key] RETURNS [checkSum: UFTfm.Word] = TRUSTED {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
checkSum _ data.headerPtr.checkSum;
};
CharacterCodingScheme: PUBLIC PROCEDURE [key: Key] RETURNS [characterCodingScheme: Rope.ROPE] = {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
characterCodingScheme _ data.characterCodingScheme;
};
Family: PUBLIC PROCEDURE [key: Key] RETURNS [family: Rope.ROPE] = {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
family _ data.family;
};
DesignSize: PUBLIC PROCEDURE [key: Key] RETURNS [designSize: REAL] = TRUSTED {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
designSize _ FixedToReal[data.headerPtr.designSize];
};
Face: PUBLIC PROCEDURE [key: Key] RETURNS [face: [0..256)] = TRUSTED {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
face _ data.headerPtr.extraInfo.parcFaceByte;
};
Range: PUBLIC PROCEDURE [key: Key] RETURNS [bc, ec: CHAR] = TRUSTED {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
bc _ '\000+data.dirPtr.bc;
ec _ '\000+data.dirPtr.ec;
};
NullFInfoEntry: UFTfm.FInfoEntry = [0, 0, 0, 0, none[]];
Contains: PUBLIC PROCEDURE [key: Key, char: CHAR] RETURNS [BOOLEAN] = TRUSTED {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
IF NOT (Ord[char]>= data.dirPtr.bc AND Ord[char] <= data.dirPtr.ec) THEN RETURN [FALSE];
RETURN[data.fInfoDesc[Ord[char]-data.dirPtr.bc] # NullFInfoEntry];
};
Width: PUBLIC PROCEDURE [key: Key, char: CHAR] RETURNS [width: REAL] = TRUSTED {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
IF NOT (Ord[char] IN [data.dirPtr.bc..data.dirPtr.ec]) THEN RETURN [Real.MinusZero];
width _ FixedToReal[data.widthDesc[data.fInfoDesc[Ord[char]-data.dirPtr.bc].widthIndex]];
};
Height: PUBLIC PROCEDURE [key: Key, char: CHAR] RETURNS [height: REAL] = TRUSTED {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
IF NOT (Ord[char] IN [data.dirPtr.bc..data.dirPtr.ec]) THEN RETURN [Real.MinusZero];
height _ FixedToReal[data.heightDesc[data.fInfoDesc[Ord[char]-data.dirPtr.bc].heightIndex]];
};
Depth: PUBLIC PROCEDURE [key: Key, char: CHAR] RETURNS [depth: REAL] = TRUSTED {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
IF NOT (Ord[char] IN [data.dirPtr.bc..data.dirPtr.ec]) THEN RETURN [Real.MinusZero];
depth _ FixedToReal[data.depthDesc[data.fInfoDesc[Ord[char]-data.dirPtr.bc].depthIndex]];
};
ItalicCorrection: PUBLIC PROCEDURE [key: Key, char: CHAR] RETURNS [italicCorrection: REAL] = TRUSTED {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
IF NOT (Ord[char] IN [data.dirPtr.bc..data.dirPtr.ec]) THEN RETURN [Real.MinusZero];
italicCorrection _ FixedToReal[data.charIcDesc[data.fInfoDesc[Ord[char]-data.dirPtr.bc].charIcIndex]];
};
LigKern: PUBLIC PROCEDURE [key: Key, char1, char2: CHAR]
RETURNS [ligOrKern: Font.LigatureOrKern] = TRUSTED {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
IF NOT (Ord[char1] IN [data.dirPtr.bc..data.dirPtr.ec] AND Ord[char2] IN [data.dirPtr.bc..data.dirPtr.ec]) THEN RETURN [[neither[]]];
WITH data.fInfoDesc[Ord[char1]-data.dirPtr.bc] SELECT FROM
ligFInfoEntry: UFTfm.FInfoEntry[lig] => {
FOR i: NAT _ ligFInfoEntry.ligKernStart, i+1 DO
ligKernEntry: UFTfm.LigKernEntry _ data.ligKernDesc[i];
IF ligKernEntry.nextChar = char2 THEN RETURN[
WITH ligKernEntry SELECT FROM
ligEntry: UFTfm.LigKernEntry[lig] => [ligature[ligatureCode: ligEntry.ligCode]],
kernEntry: UFTfm.LigKernEntry[kern] => [kern[kernAmount: FixedToReal[data.kernDesc[kernEntry.kernIndex]]]],
ENDCASE => ERROR
];
IF ligKernEntry.stop THEN RETURN[[neither[]]];
ENDLOOP
};
ENDCASE => RETURN[[neither[]]];
};
Slant: PUBLIC PROCEDURE [key: Key] RETURNS [numerator, denominator: INT] = TRUSTED {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
numerator _ UFTfm.Long[data.paramPtr[slant].ValueTimesTwoToTheTwentieth];
denominator _ TwoToTheTwentieth;
};
Parameter: PUBLIC PROCEDURE [key: Key, index: UFTfm.ParamIndex] RETURNS [parameterValue: REAL] = TRUSTED {
file: UFFileManager.FontFile _ UFFileManager.Open[key,OpenInit];
data: Data _ NARROW[file.GetData[]];
parameterValue _ IF LOOPHOLE[index, CARDINAL] > data.dirPtr.np THEN 0.0 ELSE FixedToReal[data.paramPtr[index]];
};
FONT: TYPE = Font.FONT;
LigatureOrKern: TYPE = Font.LigatureOrKern;
Box: TYPE = Font.Box;
VecMag: PROC [x, y: REAL] RETURNS [REAL] = {RETURN[Real.SqRt[x*x + y*y]]};
TFMLigKern: PROCEDURE [font: FONT, char1, char2: CHAR] RETURNS [ligatureOrKern: LigatureOrKern] = {
ligKern: LigatureOrKern _ LigKern[font.formattingKey, char1, char2];
WITH lg: ligKern SELECT FROM
kern => {
scale: REAL _ IF font.actualTransformation.Contents.b = 0 THEN font.actualTransformation.Contents.e ELSE VecMag[font.actualTransformation.Contents.b, font.actualTransformation.Contents.e];
RETURN[[kern[lg.kernAmount*scale]]]
};
ENDCASE => RETURN[ligKern];
};
TFMFormattingBox: PROCEDURE [font: FONT, char: CHAR] RETURNS [box: Box] = {
s: REAL _ IF font.actualTransformation.Contents.b = 0 THEN font.actualTransformation.Contents.e ELSE VecMag[font.actualTransformation.Contents.b, font.actualTransformation.Contents.e];
box.xmin _ 0;
box.xmax _ Width[font.formattingKey, char]*s;
box.ymin _ - Depth[font.formattingKey, char]*s;
box.ymax _ Height[font.formattingKey, char]*s;
};
TFMFormattingMetric: PROCEDURE [font: FONT, metric: ATOM, char: CHAR] RETURNS [REAL] = {
RETURN[0.0];
};
TFMObjectInit: PROCEDURE [font: FONT] = {
font.fontFormattingClass _ TFMClass;
};
TFMClass: REF Font.FontFormattingClassRec _ NEW[Font.FontFormattingClassRec _ [
formattingBoxProc: TFMFormattingBox,
ligKernProc: TFMLigKern,
formattingMetricProc: TFMFormattingMetric
]];
Font.RegisterFontFormattingClass[$Tfm, TFMObjectInit];
END.
ΐUFTfmReaderImpl.mesa
Last changed by Michael Plass, February 15, 1984 8:48:33 am PST
Last changed by Doug Wyatt, September 30, 1983 5:54 pm
Make some ropes
FontFormattingClass interface
Κ
‘˜Jš
œ™Jš
œ?™?Jš
œ6™6
unitš
Οk	˜	J˜Jš
œ˜Jšœœ˜Jšœœ!˜.Jšœœœ˜Jš
œ˜Jšœœ8˜KJš
œ˜—šœ
˜JšœA˜HJšœ˜—Jšœ
œ
˜Kšœœ˜+Jšœœ˜5Jšœœ˜0šΟnœ	œœœ˜8Jšœ
œ'˜.—Kšžœ	œœœœœ
œ˜KKšœœœ	˜šœ	œœ˜Jšœœ
˜!Jšœ
œ
˜Jšœœ
œ
œ˜(Jšœœ
œ
œ˜(Jšœœ

œ
œ
œ
œ˜9Jšœœ

œ
œ
œ
œ
˜4Jšœœ

œ
œ
œ
œ
˜5Jšœœ

œ
œ
œ
œ
˜4Jšœœ

œ
œ
œ
œ
˜5Jšœ
œ

œ
œ
œ
œ˜=Jšœ
œ

œ
œ
œ
œ
˜3Jšœœ

œ
œ
œ
œ˜8Jšœ
œ
œ
œ˜%Jš
œ˜—šœ#œ˜,Jšœœ
œ˜(Jšœœ
œ
œ˜,Jšœ
œ
˜Jšœœ
œ˜Jšžœœ
œœœœ
œ	œ&˜iJšœœœ
˜šœ
œœ˜9Jšœ˜—šœ
œ˜&Jšœ˜—šœ
œ!˜+Jšœ˜—Jšœœ˜*Jš
œ ˜ Jšœ
œ1˜LJšœ
œ˜6Jšœ
œ˜7Jšœ
œ˜6Jšœ
œ˜7Jšœ
œ˜8Jšœ
œ˜5Jšœ
œ˜6Jš
œ˜™Jš
˜Jšœœ
œ˜+Jš
œ;˜;šœœ
œ˜!Jš
œ4˜4Jš
˜—Jš
œ4˜4Jš
œ<˜<šœœ
œ˜!Jš
œ5˜5Jš
˜—Jš
œ%˜%Jš
œ˜Jš
˜—Jšœ˜
Jš
œ˜—š
žœœ
	œœœ˜PJš
œ@˜@Jšœ
œ˜$Jš
œ#˜#Jš
œ˜—š
žœœ
	œœœ˜aJš
œ@˜@Jšœ
œ˜$Jš
œ3˜3Jš
œ˜—š
žœœ
	œœœ˜CJš
œ@˜@Jšœ
œ˜$Jš
œ˜Jš
œ˜—šž
œœ
	œœœœ˜NJš
œ@˜@Jšœ
œ˜$Jš
œ4˜4Jš
œ˜—š
žœœ
	œœœ˜FJš
œ@˜@Jšœ
œ˜$Jš
œ-˜-Jš
œ˜—šžœœ
	œœ
œœ˜EJš
œ@˜@Jšœ
œ˜$Jš
œ˜Jš
œ˜Jš
œ˜—Kš
œ8˜8šžœœ
	œœœœœ˜OJš
œ@˜@Jšœ
œ˜$Jšœ
œœœ
œœ˜XJšœ<˜BJš
œ˜—šžœœ
	œœœ	œœ˜PJš
œ@˜@Jšœ
œ˜$Jš
œ
œœ#œ
œ˜TJš
œY˜YJš
œ˜—šžœœ
	œœœ
œœ˜RJš
œ@˜@Jšœ
œ˜$Jš
œ
œœ#œ
œ˜TJš
œ\˜\Jš
œ˜—šžœœ
	œœœ	œœ˜PJš
œ@˜@Jšœ
œ˜$Jš
œ
œœ#œ
œ˜TJš
œY˜YJš
œ˜—šžœœ
	œœœœœ˜fJš
œ@˜@Jšœ
œ˜$Jš
œ
œœ#œ
œ˜TJš
œf˜fJš
œ˜—šžœœ
	œœ
˜8šœ$œ˜4Jš
œ@˜@Jšœ
œ˜$Jšœ
œ
œ"œœ#œ
œ˜…
šœ+œ
˜:š
œ)˜)šœœ#˜/Jš
œ7˜7šœœ
˜-šœœ
˜Jš
œP˜PJš
œk˜kJšœ˜—Jš
œ˜—Jšœœ
œ˜.Jš
˜—Jš
œ˜—Jšœœ˜—Jš
œ˜——šžœœ
	œœœœ˜TJš
œ@˜@Jšœ
œ˜$Jš
œI˜IJš
œ ˜ Jš
œ˜—šž	œœ
	œ%œœœ˜jJš
œ@˜@Jšœ
œ˜$Jšœœ
œœœœ#˜oJš
œ˜—šΟbž
Ÿ™Kšœœœ
˜Kšœœ˜+Kšœœ˜Kšžœœœœœœ˜Jš
ž
œ	œœœœ%˜cJš
œD˜Dšœ
œ
˜š
œ	˜	Jš	œœœ*œ&œT˜Ό
Jšœ˜#Jš
œ˜—Jšœœ
˜—Jš
œ˜—š
žœ	œœœœ˜KJš	œœœ*œ&œT˜Έ
J˜
Jš
œ-˜-Jš
œ/˜/Jš
œ.˜.Jš
œ˜—šžœ	œœ
œœœœ˜XJšœ˜Jš
œ˜—šž
œ	œœ˜)Jš
œ$˜$Jš
œ˜—šœ
œœ ˜OJš
œ$˜$Jš
œ˜Jš
œ)˜)J˜—Kš
œ6˜6—Kšœ
˜—…—$P/±