[Cyan]<Cedar6.0>Imager>UFPressFontReader.mesa!1

UFPressFontReader.mesa

Created January 17, 1983 2:07 pm

Last edit by Michael Plass on February 14, 1984 2:19:03 pm PST

Last edit by Doug Wyatt on September 30, 1983 6:17 pm

DIRECTORY

Font USING [Key],

ImagerBasic USING [PathMapType, PixelArray],

Rope USING [ROPE];

UFPressFontReader: CEDAR DEFINITIONS =

BEGIN

ROPE: TYPE = Rope.ROPE;

FontKey: TYPE = RECORD [fileKey: Font.Key, fontIndex: NAT ← 0];

CharShapeRepresentation: TYPE = {raster, outline, widthsOnly};

Error: SIGNAL[errorCode: ErrorCode, fontFileWordOffset: INT];

ErrorCode: TYPE = {fileNotFound, fontIndexTooLong, cantHappen, dataSegmentTooLong, invalidPointerInFile, consistencyCheck, fileHasBeenClosed, wrongFontFormatForThisOperation, invalidCodeInFile};

NumberOfFontsInFile: PROCEDURE [fileKey: Font.Key] RETURNS [NAT];

Family: PROCEDURE [fontKey: FontKey] RETURNS [family: ROPE];

Face: PROCEDURE [fontKey: FontKey] RETURNS [face: [0..256)];

Range: PROCEDURE [fontKey: FontKey] RETURNS [bc, ec: CHAR];

Size: PROCEDURE [fontKey: FontKey] RETURNS [size: REAL];

in meters, or 0 for a scalable font

Rotation: PROCEDURE [fontKey: FontKey] RETURNS [degrees: REAL];

Representation: PROCEDURE [fontKey: FontKey] RETURNS [representation: CharShapeRepresentation];

Resolution: PROCEDURE [fontKey: FontKey] RETURNS [xRes, yRes: REAL];

in bits per inch; only useful for raster fonts

GetCharInfo: PROCEDURE [fontKey: FontKey, char: CHAR] RETURNS [info: CharInfo];

CharInfo: TYPE = RECORD [

widthX, widthY: REAL, -- the width vector

minX, minY: REAL, -- the lower left corner of the bounding box

maxX, maxY: REAL -- the upper right corner of the bounding box

];

All of the above dimensions are relative to the point size of the character, and are measured from the reference point of the character, with y increasing upwards and x increasing to the right.

MoveToProc: TYPE = PROCEDURE [x, y: REAL];

LineToProc: TYPE = PROCEDURE [x, y: REAL];

CurveToProc: TYPE = PROCEDURE [x1, y1, x2, y2, x3, y3: REAL];

DrawAreaProc: TYPE = PROCEDURE;

GetCharRaster: PROCEDURE [

fontKey: FontKey,

char: CHAR

] RETURNS [ImagerBasic.PixelArray];

ERROR if Representation[fontKey] # raster

GetCharOutline: PROCEDURE [

fontKey: FontKey,

char: CHAR,

moveToProc: MoveToProc,

lineToProc: LineToProc,

curveToProc: CurveToProc,

drawAreaProc: DrawAreaProc

];

GetCharPath: PROCEDURE [

fontKey: FontKey,

char: CHAR

] RETURNS [pathMap: ImagerBasic.PathMapType, pathData: REF];

ERROR if Representation[fontKey] # outline.

END.