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Diffstat (limited to 'nx-X11/lib/font/Type1/type1.c')
| -rw-r--r-- | nx-X11/lib/font/Type1/type1.c | 1892 |
1 files changed, 0 insertions, 1892 deletions
diff --git a/nx-X11/lib/font/Type1/type1.c b/nx-X11/lib/font/Type1/type1.c deleted file mode 100644 index b3fa4965a..000000000 --- a/nx-X11/lib/font/Type1/type1.c +++ /dev/null @@ -1,1892 +0,0 @@ -/* $Xorg: type1.c,v 1.4 2000/08/17 19:46:34 cpqbld Exp $ */ -/* Copyright International Business Machines, Corp. 1991 - * All Rights Reserved - * Copyright Lexmark International, Inc. 1991 - * All Rights Reserved - * Portions Copyright (c) 1990 Adobe Systems Incorporated. - * All Rights Reserved - * - * License to use, copy, modify, and distribute this software and its - * documentation for any purpose and without fee is hereby granted, - * provided that the above copyright notice appear in all copies and that - * both that copyright notice and this permission notice appear in - * supporting documentation, and that the name of IBM or Lexmark or Adobe - * not be used in advertising or publicity pertaining to distribution of - * the software without specific, written prior permission. - * - * IBM, LEXMARK, AND ADOBE PROVIDE THIS SOFTWARE "AS IS", WITHOUT ANY - * WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT - * LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A - * PARTICULAR PURPOSE, AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. THE - * ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE, INCLUDING - * ANY DUTY TO SUPPORT OR MAINTAIN, BELONGS TO THE LICENSEE. SHOULD ANY - * PORTION OF THE SOFTWARE PROVE DEFECTIVE, THE LICENSEE (NOT IBM, - * LEXMARK, OR ADOBE) ASSUMES THE ENTIRE COST OF ALL SERVICING, REPAIR AND - * CORRECTION. IN NO EVENT SHALL IBM, LEXMARK, OR ADOBE BE LIABLE FOR ANY - * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER - * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF - * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN - * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ -/* Copyright (c) 1994-1999 Silicon Graphics, Inc. All Rights Reserved. - * - * The contents of this file are subject to the CID Font Code Public Licence - * Version 1.0 (the "License"). You may not use this file except in compliance - * with the Licence. You may obtain a copy of the License at Silicon Graphics, - * Inc., attn: Legal Services, 2011 N. Shoreline Blvd., Mountain View, CA - * 94043 or at http://www.sgi.com/software/opensource/cid/license.html. - * - * Software distributed under the License is distributed on an "AS IS" basis. - * ALL WARRANTIES ARE DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED - * WARRANTIES OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR PURPOSE OR OF - * NON-INFRINGEMENT. See the License for the specific language governing - * rights and limitations under the License. - * - * The Original Software is CID font code that was developed by Silicon - * Graphics, Inc. - */ -/* $XFree86: xc/lib/font/Type1/type1.c,v 1.9tsi Exp $ */ - -/*********************************************************************/ -/* */ -/* Type 1 module - Converting fonts in Adobe Type 1 Font Format */ -/* to scaled and hinted paths for rasterization. */ -/* Files: type1.c, type1.h, and blues.h. */ -/* */ -/* Authors: Sten F. Andler, IBM Almaden Research Center */ -/* (Type 1 interpreter, stem & flex hints) */ -/* */ -/* Patrick A. Casey, Lexmark International, Inc. */ -/* (Font level hints & stem hints) */ -/* */ -/*********************************************************************/ - -/******************/ -/* Include Files: */ -/******************/ -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif -#ifdef BUILDCID -#define XFONT_CID 1 -#endif - -#ifndef FONTMODULE -#include <stdio.h> /* a system-dependent include, usually */ -#include <math.h> -#else -#include "Xdefs.h" -#include "Xmd.h" -#include "xf86_ansic.h" -#endif -#include "objects.h" -#include "spaces.h" -#include "paths.h" -#include "fonts.h" /* understands about TEXTTYPEs */ -#include "pictures.h" /* understands about handles */ -#include "range.h" - -typedef struct xobject xobject; -#include "util.h" /* PostScript objects */ -#include "fontfcn.h" -#include "blues.h" /* Blues structure for font-level hints */ - -/**********************************/ -/* Type1 Constants and Structures */ -/**********************************/ -#define MAXSTACK 24 /* Adobe Type1 limit */ -#define MAXCALLSTACK 10 /* Adobe Type1 limit */ -#define MAXPSFAKESTACK 32 /* Max depth of fake PostScript stack (local) */ -#define MAXSTRLEN 512 /* Max length of a Type 1 string (local) */ -#define MAXLABEL 256 /* Maximum number of new hints */ -#if XFONT_CID -#define MAXSTEMS 500 /* Maximum number of VSTEM and HSTEM hints */ -#else -#define MAXSTEMS 128 /* Maximum number of VSTEM and HSTEM hints */ -#endif -#define EPS 0.001 /* Small number for comparisons */ - -/************************************/ -/* Adobe Type 1 CharString commands */ -/************************************/ -#define HSTEM 1 -#define VSTEM 3 -#define VMOVETO 4 -#define RLINETO 5 -#define HLINETO 6 -#define VLINETO 7 -#define RRCURVETO 8 -#define CLOSEPATH 9 -#define CALLSUBR 10 -#define RETURN 11 -#define ESCAPE 12 -#define HSBW 13 -#define ENDCHAR 14 -#define RMOVETO 21 -#define HMOVETO 22 -#define VHCURVETO 30 -#define HVCURVETO 31 - -/*******************************************/ -/* Adobe Type 1 CharString Escape commands */ -/*******************************************/ -#define DOTSECTION 0 -#define VSTEM3 1 -#define HSTEM3 2 -#define SEAC 6 -#define SBW 7 -#define DIV 12 -#define CALLOTHERSUBR 16 -#define POP 17 -#define SETCURRENTPOINT 33 - -/*****************/ -/* Useful macros */ -/*****************/ - -#define FABS(x) fabs(x) - -#define CEIL(x) ceil(x) - -#define FLOOR(x) floor(x) - -#define ROUND(x) FLOOR((x) + 0.5) - -#define ODD(x) (((int)(x)) & 01) - -#define Error {errflag = TRUE; return;} -#define ErrorRet(ret) {errflag = TRUE; return (ret);} - -/********************/ -/* global variables */ -/********************/ -struct stem { /* representation of a STEM hint */ - int vertical; /* TRUE if vertical, FALSE otherwise */ - double x, dx; /* interval of vertical stem */ - double y, dy; /* interval of horizontal stem */ - struct segment *lbhint, *lbrevhint; /* left or bottom hint adjustment */ - struct segment *rthint, *rtrevhint; /* right or top hint adjustment */ -}; - -struct xobject *Type1Char(char *env, struct XYspace *S, - psobj *charstrP, psobj *subrsP, psobj *osubrsP, - struct blues_struct *bluesP, int *modeP); -#if XFONT_CID -struct xobject *CIDChar(char *env, struct XYspace *S, - psobj *charstrP, psobj *subrsP, psobj *osubrsP, - struct blues_struct *bluesP, int *modeP); -#endif - -static double escapementX, escapementY; -static double sidebearingX, sidebearingY; -static double accentoffsetX, accentoffsetY; - -static struct segment *path; -static int errflag; - -/*************************************************/ -/* Global variables to hold Type1Char parameters */ -/*************************************************/ -static char *Environment; -static struct XYspace *CharSpace; -static psobj *CharStringP, *SubrsP; - -/************************/ -/* Forward declarations */ -/************************/ -static struct segment *Applyhint ( struct segment *p, int stemnumber, - int half ); -static struct segment *Applyrevhint ( struct segment *p, int stemnumber, - int half ); -static void CallOtherSubr ( int othersubrno ); -static void CallSubr ( int subrno ); -static struct segment *CenterStem ( double edge1, double edge2 ); -static void ClearCallStack ( void ); -static void ClearPSFakeStack ( void ); -static void ClearStack ( void ); -static void ComputeAlignmentZones ( void ); -static void ComputeStem ( int stemno ); -static void Decode ( int Code ); -static unsigned char Decrypt ( unsigned char cipher ); -static double Div ( double num1, double num2 ); -static void DoClosePath ( void ); -static void DoCommand ( int Code ); -static int DoRead ( int *CodeP ); -static void DotSection ( void ); -static void EndChar ( void ); -static void Escape ( int Code ); -static struct segment *FindStems ( double x, double y, double dx, double dy ); -static void FinitStems ( void ); -static void FlxProc ( double c1x2, double c1y2, double c3x0, double c3y0, - double c3x1, double c3y1, double c3x2, double c3y2, - double c4x0, double c4y0, double c4x1, double c4y1, - double c4x2, double c4y2, double epY, double epX, - int idmin ); -static void FlxProc1 ( void ); -static void FlxProc2 ( void ); -static void HintReplace ( void ); -static void HStem ( double y, double dy ); -static void InitStems ( void ); -static void PopCall ( psobj **CurrStrPP, int *CurrIndexP, - unsigned short *CurrKeyP ); -static double PSFakePop ( void ); -static void PSFakePush ( double Num ); -static void Push ( double Num ); -static void PushCall ( psobj *CurrStrP, int CurrIndex, - unsigned short CurrKey ); -static void Return ( void ); -static void RLineTo ( double dx, double dy ); -static void RMoveTo ( double dx, double dy ); -static void RRCurveTo ( double dx1, double dy1, double dx2, double dy2, - double dx3, double dy3 ); -static void Sbw ( double sbx, double sby, double wx, double wy ); -static void Seac ( double asb, double adx, double ady, unsigned char bchar, - unsigned char achar ); -static void SetCurrentPoint ( double x, double y ); -static void StartDecrypt ( void ); -static void VStem ( double x, double dx ); - -/*****************************************/ -/* statics for Flex procedures (FlxProc) */ -/*****************************************/ -static struct segment *FlxOldPath; /* save path before Flex feature */ - -/******************************************************/ -/* statics for Font level hints (Blues) (see blues.h) */ -/******************************************************/ -static struct blues_struct *blues; /* the blues structure */ -static struct alignmentzone alignmentzones[MAXALIGNMENTZONES]; -static int numalignmentzones; /* total number of alignment zones */ - -/****************************************************************/ -/* Subroutines for the Font level hints (Alignment zones, etc.) */ -/****************************************************************/ - -/******************************************/ -/* Fill in the alignment zone structures. */ -/******************************************/ -static void -ComputeAlignmentZones(void) -{ - int i; - double dummy, bluezonepixels, familyzonepixels; - struct segment *p; - - numalignmentzones = 0; /* initialize total # of zones */ - - /* do the BlueValues zones */ - for (i = 0; i < blues->numBlueValues; i +=2, ++numalignmentzones) { - /* the 0th & 1st numbers in BlueValues are for a bottom zone */ - /* the rest are topzones */ - if (i == 0) /* bottom zone */ - alignmentzones[numalignmentzones].topzone = FALSE; - else /* top zone */ - alignmentzones[numalignmentzones].topzone = TRUE; - if (i < blues->numFamilyBlues) { /* we must consider FamilyBlues */ - p = ILoc(CharSpace,0,blues->BlueValues[i] - blues->BlueValues[i+1]); - QueryLoc(p, IDENTITY, &dummy, &bluezonepixels); - Destroy(p); - p = ILoc(CharSpace,0,blues->FamilyBlues[i]-blues->FamilyBlues[i+1]); - QueryLoc(p, IDENTITY, &dummy, &familyzonepixels); - Destroy(p); - /* is the difference in size of the zones less than 1 pixel? */ - if (FABS(bluezonepixels - familyzonepixels) < 1.0) { - /* use the Family zones */ - alignmentzones[numalignmentzones].bottomy = - blues->FamilyBlues[i]; - alignmentzones[numalignmentzones].topy = - blues->FamilyBlues[i+1]; - continue; - } - } - /* use this font's Blue zones */ - alignmentzones[numalignmentzones].bottomy = blues->BlueValues[i]; - alignmentzones[numalignmentzones].topy = blues->BlueValues[i+1]; - } - - /* do the OtherBlues zones */ - for (i = 0; i < blues->numOtherBlues; i +=2, ++numalignmentzones) { - /* all of the OtherBlues zones are bottom zones */ - alignmentzones[numalignmentzones].topzone = FALSE; - if (i < blues->numFamilyOtherBlues) {/* consider FamilyOtherBlues */ - p = ILoc(CharSpace,0,blues->OtherBlues[i] - blues->OtherBlues[i+1]); - QueryLoc(p, IDENTITY, &dummy, &bluezonepixels); - Destroy(p); - p = ILoc(CharSpace,0,blues->FamilyOtherBlues[i] - - blues->FamilyOtherBlues[i+1]); - QueryLoc(p, IDENTITY, &dummy, &familyzonepixels); - Destroy(p); - /* is the difference in size of the zones less than 1 pixel? */ - if (FABS(bluezonepixels - familyzonepixels) < 1.0) { - /* use the Family zones */ - alignmentzones[numalignmentzones].bottomy = - blues->FamilyOtherBlues[i]; - alignmentzones[numalignmentzones].topy = - blues->FamilyOtherBlues[i+1]; - continue; - } - } - /* use this font's Blue zones (as opposed to the Family Blues */ - alignmentzones[numalignmentzones].bottomy = blues->OtherBlues[i]; - alignmentzones[numalignmentzones].topy = blues->OtherBlues[i+1]; - } -} - -/**********************************************************************/ -/* Subroutines and statics for handling of the VSTEM and HSTEM hints. */ -/**********************************************************************/ -static int InDotSection; /* DotSection flag */ -static struct stem stems[MAXSTEMS]; /* All STEM hints */ -static int numstems; /* Number of STEM hints */ -static int currstartstem; /* The current starting stem. */ -static int oldvert, oldhor; /* Remember hint in effect */ -static int oldhorhalf, oldverthalf; /* Remember which half of the stem */ -static double wsoffsetX, wsoffsetY; /* White space offset - for VSTEM3,HSTEM3 */ -static int wsset; /* Flag for whether we've set wsoffsetX,Y */ - -static void -InitStems(void) /* Initialize the STEM hint data structures */ -{ - InDotSection = FALSE; - currstartstem = numstems = 0; - oldvert = oldhor = -1; -} - -static void -FinitStems(void) /* Terminate the STEM hint data structures */ -{ - int i; - - for (i = 0; i < numstems; i++) { - Destroy(stems[i].lbhint); - Destroy(stems[i].lbrevhint); - Destroy(stems[i].rthint); - Destroy(stems[i].rtrevhint); - } -} - -/*******************************************************************/ -/* Compute the dislocation that a stemhint should cause for points */ -/* inside the stem. */ -/*******************************************************************/ -static void -ComputeStem(int stemno) -{ - int verticalondevice, idealwidth; - double stemstart, stemwidth; - struct segment *p; - int i; - double stembottom, stemtop, flatposition; - double Xpixels, Ypixels; - double unitpixels, onepixel; - int suppressovershoot, enforceovershoot; - double stemshift, flatpospixels, overshoot; - double widthdiff; /* Number of character space units to adjust width */ - double lbhintvalue, rthintvalue; - double cxx, cyx, cxy, cyy; /* Transformation matrix */ - int rotated; /* TRUE if character is on the side, FALSE if upright */ - - /************************************************/ - /* DETERMINE ORIENTATION OF CHARACTER ON DEVICE */ - /************************************************/ - - QuerySpace(CharSpace, &cxx, &cyx, &cxy, &cyy); /* Transformation matrix */ - - if (FABS(cxx) < 0.00001 || FABS(cyy) < 0.00001) - rotated = TRUE; /* Char is on side (90 or 270 degrees), possibly oblique. */ - else if (FABS(cyx) < 0.00001 || FABS(cxy) < 0.00001) - rotated = FALSE; /* Char is upright (0 or 180 degrees), possibly oblique. */ - else { - stems[stemno].lbhint = NULL; /* Char is at non-axial angle, ignore hints. */ - stems[stemno].lbrevhint = NULL; - stems[stemno].rthint = NULL; - stems[stemno].rtrevhint = NULL; - return; - } - - /* Determine orientation of stem */ - - if (stems[stemno].vertical) { - verticalondevice = !rotated; - stemstart = stems[stemno].x; - stemwidth = stems[stemno].dx; - } else { - verticalondevice = rotated; - stemstart = stems[stemno].y; - stemwidth = stems[stemno].dy; - } - - /* Determine how many pixels (non-negative) correspond to 1 character space - unit (unitpixels), and how many character space units (non-negative) - correspond to one pixel (onepixel). */ - - if (stems[stemno].vertical) - p = ILoc(CharSpace, 1, 0); - else - p = ILoc(CharSpace, 0, 1); - QueryLoc(p, IDENTITY, &Xpixels, &Ypixels); - Destroy(p); - if (verticalondevice) - unitpixels = FABS(Xpixels); - else - unitpixels = FABS(Ypixels); - - onepixel = 1.0 / unitpixels; - - /**********************/ - /* ADJUST STEM WIDTHS */ - /**********************/ - - widthdiff = 0.0; - - /* Find standard stem with smallest width difference from this stem */ - if (stems[stemno].vertical) { /* vertical stem */ - if (blues->StdVW != 0) /* there is an entry for StdVW */ - widthdiff = blues->StdVW - stemwidth; - for (i = 0; i < blues->numStemSnapV; ++i) { /* now look at StemSnapV */ - if (blues->StemSnapV[i] - stemwidth < widthdiff) - /* this standard width is the best match so far for this stem */ - widthdiff = blues->StemSnapV[i] - stemwidth; - } - } else { /* horizontal stem */ - if (blues->StdHW != 0) /* there is an entry for StdHW */ - widthdiff = blues->StdHW - stemwidth; - for (i = 0; i < blues->numStemSnapH; ++i) { /* now look at StemSnapH */ - if (blues->StemSnapH[i] - stemwidth < widthdiff) - /* this standard width is the best match so far for this stem */ - widthdiff = blues->StemSnapH[i] - stemwidth; - } - } - - /* Only expand or contract stems if they differ by less than 1 pixel from - the closest standard width, otherwise make the width difference = 0. */ - if (FABS(widthdiff) > onepixel) - widthdiff = 0.0; - - /* Expand or contract stem to the nearest integral number of pixels. */ - idealwidth = ROUND((stemwidth + widthdiff) * unitpixels); - /* Ensure that all stems are at least one pixel wide. */ - if (idealwidth == 0) - idealwidth = 1; - /* Apply ForceBold to vertical stems. */ - if (blues->ForceBold && stems[stemno].vertical) - /* Force this vertical stem to be at least DEFAULTBOLDSTEMWIDTH wide. */ - if (idealwidth < DEFAULTBOLDSTEMWIDTH) - idealwidth = DEFAULTBOLDSTEMWIDTH; - /* Now compute the number of character space units necessary */ - widthdiff = idealwidth * onepixel - stemwidth; - - /*********************************************************************/ - /* ALIGNMENT ZONES AND OVERSHOOT SUPPRESSION - HORIZONTAL STEMS ONLY */ - /*********************************************************************/ - - stemshift = 0.0; - - if (!stems[stemno].vertical) { - - /* Get bottom and top boundaries of the stem. */ - stembottom = stemstart; - stemtop = stemstart + stemwidth; - - /* Find out if this stem intersects an alignment zone (the BlueFuzz */ - /* entry in the Private dictionary specifies the number of character */ - /* units to extend (in both directions) the effect of an alignment */ - /* zone on a horizontal stem. The default value of BlueFuzz is 1. */ - for (i = 0; i < numalignmentzones; ++i) { - if (alignmentzones[i].topzone) { - if (stemtop >= alignmentzones[i].bottomy && - stemtop <= alignmentzones[i].topy + blues->BlueFuzz) { - break; /* We found a top-zone */ - } - } else { - if (stembottom <= alignmentzones[i].topy && - stembottom >= alignmentzones[i].bottomy - blues->BlueFuzz) { - break; /* We found a bottom-zone */ - } - } - } - - if (i < numalignmentzones) { /* We found an intersecting zone (number i). */ - suppressovershoot = FALSE; - enforceovershoot = FALSE; - - /* When 1 character space unit is rendered smaller than BlueScale - device units (pixels), we must SUPPRESS overshoots. Otherwise, - if the top (or bottom) of this stem is more than BlueShift character - space units away from the flat position, we must ENFORCE overshoot. */ - - if (unitpixels < blues->BlueScale) - suppressovershoot = TRUE; - else - if (alignmentzones[i].topzone) { - if (stemtop >= alignmentzones[i].bottomy + blues->BlueShift) - enforceovershoot = TRUE; - } else - if (stembottom <= alignmentzones[i].topy - blues->BlueShift) - enforceovershoot = TRUE; - - /*************************************************/ - /* ALIGN THE FLAT POSITION OF THE ALIGNMENT ZONE */ - /*************************************************/ - - /* Compute the position of the alignment zone's flat position in - device space and the amount of shift needed to align it on a - pixel boundary. Move all stems this amount. */ - - if (alignmentzones[i].topzone) - flatposition = alignmentzones[i].bottomy; - else - flatposition = alignmentzones[i].topy; - - /* Find the flat position in pixels */ - flatpospixels = flatposition * unitpixels; - - /* Find the stem shift necessary to align the flat - position on a pixel boundary, and use this shift for all stems */ - stemshift = (ROUND(flatpospixels) - flatpospixels) * onepixel; - - /************************************************/ - /* HANDLE OVERSHOOT ENFORCEMENT AND SUPPRESSION */ - /************************************************/ - - /* Compute overshoot amount (non-negative) */ - if (alignmentzones[i].topzone) - overshoot = stemtop - flatposition; - else - overshoot = flatposition - stembottom; - - if (overshoot > 0.0) { - /* ENFORCE overshoot by shifting the entire stem (if necessary) so that - it falls at least one pixel beyond the flat position. */ - - if (enforceovershoot) - if (overshoot < onepixel) { - if (alignmentzones[i].topzone) - stemshift += onepixel - overshoot; - else - stemshift -= onepixel - overshoot; - } - /* SUPPRESS overshoot by aligning the stem to the alignment zone's - flat position. */ - - if (suppressovershoot) { - if (alignmentzones[i].topzone) - stemshift -= overshoot; - else - stemshift += overshoot; - } - } - - /************************************************************/ - /* COMPUTE HINT VALUES FOR EACH SIDE OF THE HORIZONTAL STEM */ - /************************************************************/ - - /* If the stem was aligned by a topzone, we expand or contract the stem - only at the bottom - since the stem top was aligned by the zone. - If the stem was aligned by a bottomzone, we expand or contract the stem - only at the top - since the stem bottom was aligned by the zone. */ - if (alignmentzones[i].topzone) { - lbhintvalue = stemshift - widthdiff; /* bottom */ - rthintvalue = stemshift; /* top */ - } else { - lbhintvalue = stemshift; /* bottom */ - rthintvalue = stemshift + widthdiff; /* top */ - } - - stems[stemno].lbhint = (struct segment *)Permanent(Loc(CharSpace, 0.0, lbhintvalue)); - stems[stemno].lbrevhint = (struct segment *)Permanent(Loc(CharSpace, 0.0, -lbhintvalue)); - stems[stemno].rthint = (struct segment *)Permanent(Loc(CharSpace, 0.0, rthintvalue)); - stems[stemno].rtrevhint = (struct segment *)Permanent(Loc(CharSpace, 0.0, -rthintvalue)); - - return; - - } /* endif (i < numalignmentzones) */ - - /* We didn't find any alignment zones intersecting this stem, so - proceed with normal stem alignment below. */ - - } /* endif (!stems[stemno].vertical) */ - - /* Align stem with pixel boundaries on device */ - stemstart = stemstart - widthdiff / 2; - stemshift = ROUND(stemstart * unitpixels) * onepixel - stemstart; - - /* Adjust the boundaries of the stem */ - lbhintvalue = stemshift - widthdiff / 2; /* left or bottom */ - rthintvalue = stemshift + widthdiff / 2; /* right or top */ - - if (stems[stemno].vertical) { - stems[stemno].lbhint = (struct segment *)Permanent(Loc(CharSpace, lbhintvalue, 0.0)); - stems[stemno].lbrevhint = (struct segment *)Permanent(Loc(CharSpace, -lbhintvalue, 0.0)); - stems[stemno].rthint = (struct segment *)Permanent(Loc(CharSpace, rthintvalue, 0.0)); - stems[stemno].rtrevhint = (struct segment *)Permanent(Loc(CharSpace, -rthintvalue, 0.0)); - } else { - stems[stemno].lbhint = (struct segment *)Permanent(Loc(CharSpace, 0.0, lbhintvalue)); - stems[stemno].lbrevhint = (struct segment *)Permanent(Loc(CharSpace, 0.0, -lbhintvalue)); - stems[stemno].rthint = (struct segment *)Permanent(Loc(CharSpace, 0.0, rthintvalue)); - stems[stemno].rtrevhint = (struct segment *)Permanent(Loc(CharSpace, 0.0, -rthintvalue)); - } -} - -#define LEFT 1 -#define RIGHT 2 -#define BOTTOM 3 -#define TOP 4 - -/*********************************************************************/ -/* Adjust a point using the given stem hint. Use the left/bottom */ -/* hint value or the right/top hint value depending on where the */ -/* point lies in the stem. */ -/*********************************************************************/ -static struct segment * -Applyhint(struct segment *p, int stemnumber, int half) -{ - if (half == LEFT || half == BOTTOM) - return Join(p, stems[stemnumber].lbhint); /* left or bottom hint */ - else - return Join(p, stems[stemnumber].rthint); /* right or top hint */ -} - -/*********************************************************************/ -/* Adjust a point using the given reverse hint. Use the left/bottom */ -/* hint value or the right/top hint value depending on where the */ -/* point lies in the stem. */ -/*********************************************************************/ -static struct segment * -Applyrevhint(struct segment *p, int stemnumber, int half) -{ - if (half == LEFT || half == BOTTOM) - return Join(p, stems[stemnumber].lbrevhint); /* left or bottom hint */ - else - return Join(p, stems[stemnumber].rtrevhint); /* right or top hint */ -} - -/***********************************************************************/ -/* Find the vertical and horizontal stems that the current point */ -/* (x, y) may be involved in. At most one horizontal and one vertical */ -/* stem can apply to a single point, since there are no overlaps */ -/* allowed. */ -/* The actual hintvalue is returned as a location. */ -/* Hints are ignored inside a DotSection. */ -/***********************************************************************/ -static struct segment * -FindStems(double x, double y, double dx, double dy) -{ - int i; - int newvert, newhor; - struct segment *p; - int newhorhalf, newverthalf; - - if (InDotSection) return(NULL); - - newvert = newhor = -1; - newhorhalf = newverthalf = -1; - - for (i = currstartstem; i < numstems; i++) { - if (stems[i].vertical) { /* VSTEM hint */ - if ((x >= stems[i].x - EPS) && - (x <= stems[i].x+stems[i].dx + EPS)) { - newvert = i; - if (dy != 0.0) { - if (dy < 0) newverthalf = LEFT; - else newverthalf = RIGHT; - } else { - if (x < stems[i].x+stems[i].dx / 2) newverthalf = LEFT; - else newverthalf = RIGHT; - } - } - } else { /* HSTEM hint */ - if ((y >= stems[i].y - EPS) && - (y <= stems[i].y+stems[i].dy + EPS)) { - newhor = i; - if (dx != 0.0) { - if (dx < 0) newhorhalf = TOP; - else newhorhalf = BOTTOM; - } else { - if (y < stems[i].y+stems[i].dy / 2) newhorhalf = BOTTOM; - else newhorhalf = TOP; - } - } - } - } - - p = NULL; - - if (newvert == -1 && oldvert == -1) ; /* Outside of any hints */ - else if (newvert == oldvert && - newverthalf == oldverthalf); /* No hint change */ - else if (oldvert == -1) { /* New vertical hint in effect */ - p = Applyhint(p, newvert, newverthalf); - } else if (newvert == -1) { /* Old vertical hint no longer in effect */ - p = Applyrevhint(p, oldvert, oldverthalf); - } else { /* New vertical hint in effect, old hint no longer in effect */ - p = Applyrevhint(p, oldvert, oldverthalf); - p = Applyhint(p, newvert, newverthalf); - } - - if (newhor == -1 && oldhor == -1) ; /* Outside of any hints */ - else if (newhor == oldhor && - newhorhalf == oldhorhalf) ; /* No hint change */ - else if (oldhor == -1) { /* New horizontal hint in effect */ - p = Applyhint(p, newhor, newhorhalf); - } else if (newhor == -1) { /* Old horizontal hint no longer in effect */ - p = Applyrevhint(p, oldhor, oldhorhalf); - } - else { /* New horizontal hint in effect, old hint no longer in effect */ - p = Applyrevhint(p, oldhor, oldhorhalf); - p = Applyhint(p, newhor, newhorhalf); - } - - oldvert = newvert; oldverthalf = newverthalf; - oldhor = newhor; oldhorhalf = newhorhalf; - - return p; -} - -/******************************************************/ -/* Subroutines and statics for the Type1Char routines */ -/******************************************************/ - -static int strindex; /* index into PostScript string being interpreted */ -static double currx, curry; /* accumulated x and y values for hints */ - -struct callstackentry { - psobj *currstrP; /* current CharStringP */ - int currindex; /* current strindex */ - unsigned short currkey; /* current decryption key */ - }; - -static double Stack[MAXSTACK]; -static int Top; -static struct callstackentry CallStack[MAXCALLSTACK]; -static int CallTop; -static double PSFakeStack[MAXPSFAKESTACK]; -static int PSFakeTop; - -static void -ClearStack(void) -{ - Top = -1; -} - -static void -Push(double Num) -{ - if (++Top < MAXSTACK) Stack[Top] = Num; - else Error; -} - -static void -ClearCallStack(void) -{ - CallTop = -1; -} - -static void -PushCall(psobj *CurrStrP, int CurrIndex, unsigned short CurrKey) -{ - if (++CallTop < MAXCALLSTACK) { - CallStack[CallTop].currstrP = CurrStrP; /* save CharString pointer */ - CallStack[CallTop].currindex = CurrIndex; /* save CharString index */ - CallStack[CallTop].currkey = CurrKey; /* save decryption key */ - } - else Error; -} - -static void -PopCall(psobj **CurrStrPP, int *CurrIndexP, unsigned short *CurrKeyP) -{ - if (CallTop >= 0) { - *CurrStrPP = CallStack[CallTop].currstrP; /* restore CharString pointer */ - *CurrIndexP = CallStack[CallTop].currindex; /* restore CharString index */ - *CurrKeyP = CallStack[CallTop--].currkey; /* restore decryption key */ - } - else Error; -} - -static void -ClearPSFakeStack(void) -{ - PSFakeTop = -1; -} - -/* PSFakePush: Pushes a number onto the fake PostScript stack */ -static void -PSFakePush(double Num) -{ - if (++PSFakeTop < MAXPSFAKESTACK) PSFakeStack[PSFakeTop] = Num; - else Error; -} - -/* PSFakePop: Removes a number from the top of the fake PostScript stack */ -static double -PSFakePop (void) -{ - if (PSFakeTop >= 0) return(PSFakeStack[PSFakeTop--]); - else ErrorRet(0.0); - /*NOTREACHED*/ -} - -/***********************************************************************/ -/* Center a stem on the pixel grid -- used by HStem3 and VStem3 */ -/***********************************************************************/ -static struct segment * -CenterStem(double edge1, double edge2) -{ - int idealwidth, verticalondevice; - double leftx, lefty, rightx, righty, center, width; - double widthx, widthy; - double shift, shiftx, shifty; - double Xpixels, Ypixels; - struct segment *p; - - p = Loc(CharSpace, edge1, 0.0); - QueryLoc(p, IDENTITY, &leftx, &lefty); - - p = Join(p, Loc(CharSpace, edge2, 0.0)); - QueryLoc(p, IDENTITY, &rightx, &righty); - Destroy(p); - - widthx = FABS(rightx - leftx); - widthy = FABS(righty - lefty); - - if (widthy <= EPS) { /* verticalondevice hint */ - verticalondevice = TRUE; - center = (rightx + leftx) / 2.0; - width = widthx; - } - else if (widthx <= EPS) { /* horizontal hint */ - verticalondevice = FALSE; - center = (righty + lefty) / 2.0; - width = widthy; - } - else { /* neither horizontal nor verticalondevice and not oblique */ - return (NULL); - } - - idealwidth = ROUND(width); - if (idealwidth == 0) idealwidth = 1; - if (ODD(idealwidth)) { /* is ideal width odd? */ - /* center stem over pixel */ - shift = FLOOR(center) + 0.5 - center; - } - else { - /* align stem on pixel boundary */ - shift = ROUND(center) - center; - } - - if (verticalondevice) { - shiftx = shift; - shifty = 0.0; - } else { - shifty = shift; - shiftx = 0.0; - } - - p = Loc(IDENTITY, shiftx, shifty); - QueryLoc(p, CharSpace, &Xpixels, &Ypixels); - wsoffsetX = Xpixels; wsoffsetY = Ypixels; - currx += wsoffsetX; curry += wsoffsetY; - - return (p); -} - -/*----------------------------------------------------------------------- - Decrypt - From Adobe Type 1 book page 63, with some modifications ------------------------------------------------------------------------*/ -#define KEY 4330 /* Initial key (seed) for CharStrings decryption */ -#define C1 52845 /* Multiplier for pseudo-random number generator */ -#define C2 22719 /* Constant for pseudo-random number generator */ - -static unsigned short r; /* Pseudo-random sequence of keys */ - -static unsigned char -Decrypt(unsigned char cipher) -{ - unsigned char plain; - - plain = cipher ^ (r >> 8); - r = (cipher + r) * C1 + C2; - return plain; -} - -/* Get the next byte from the codestring being interpreted */ -static int -DoRead(int *CodeP) -{ - if (strindex >= CharStringP->len) return(FALSE); /* end of string */ - *CodeP = Decrypt((unsigned char) CharStringP->data.stringP[strindex++]); - return(TRUE); -} - -/* Strip blues->lenIV bytes from CharString and update encryption key */ -/* (the lenIV entry in the Private dictionary specifies the number of */ -/* random bytes at the beginning of each CharString; default is 4) */ -static void -StartDecrypt(void) -{ - int Code; - - r = KEY; /* Initial key (seed) for CharStrings decryption */ - for (strindex = 0; strindex < blues->lenIV;) - if (!DoRead(&Code)) /* Read a byte and update decryption key */ - Error; -} - -static void -Decode(int Code) -{ - int Code1, Code2, Code3, Code4; - - if (Code <= 31) /* Code is [0,31] */ - DoCommand(Code); - else if (Code <= 246) /* Code is [32,246] */ - Push((double)(Code - 139)); - else if (Code <= 250) { /* Code is [247,250] */ - if (!DoRead(&Code2)) goto ended; - Push((double)(((Code - 247) << 8) + Code2 + 108)); - } - else if (Code <= 254) { /* Code is [251,254] */ - if (!DoRead(&Code2)) goto ended; - Push((double)( -((Code - 251) << 8) - Code2 - 108)); - } - else { /* Code is 255 */ - if (!DoRead(&Code1)) goto ended; - if (!DoRead(&Code2)) goto ended; - if (!DoRead(&Code3)) goto ended; - if (!DoRead(&Code4)) goto ended; - Push((double)((((((Code1<<8) + Code2)<<8) + Code3)<<8) + Code4)); - } - return; - -ended: Error; -} - -/* Interpret a command code */ -static void -DoCommand(int Code) -{ - switch(Code) { - case HSTEM: /* |- y dy HSTEM |- */ - /* Vertical range of a horizontal stem zone */ - if (Top < 1) Error; - HStem(Stack[0], Stack[1]); - ClearStack(); - break; - case VSTEM: /* |- x dx VSTEM |- */ - /* Horizontal range of a vertical stem zone */ - if (Top < 1) Error; - VStem(Stack[0], Stack[1]); - ClearStack(); - break; - case VMOVETO: /* |- dy VMOVETO |- */ - /* Vertical MOVETO, equivalent to 0 dy RMOVETO */ - if (Top < 0) Error; - RMoveTo(0.0, Stack[0]); - ClearStack(); - break; - case RLINETO: /* |- dx dy RLINETO |- */ - /* Like RLINETO in PostScript */ - if (Top < 1) Error; - RLineTo(Stack[0], Stack[1]); - ClearStack(); - break; - case HLINETO: /* |- dx HLINETO |- */ - /* Horizontal LINETO, equivalent to dx 0 RLINETO */ - if (Top < 0) Error; - RLineTo(Stack[0], 0.0); - ClearStack(); - break; - case VLINETO: /* |- dy VLINETO |- */ - /* Vertical LINETO, equivalent to 0 dy RLINETO */ - if (Top < 0) Error; - RLineTo(0.0, Stack[0]); - ClearStack(); - break; - case RRCURVETO: - /* |- dx1 dy1 dx2 dy2 dx3 dy3 RRCURVETO |- */ - /* Relative RCURVETO, equivalent to dx1 dy1 */ - /* (dx1+dx2) (dy1+dy2) (dx1+dx2+dx3) */ - /* (dy1+dy2+dy3) RCURVETO in PostScript */ - if (Top < 5) Error; - RRCurveTo(Stack[0], Stack[1], Stack[2], Stack[3], - Stack[4], Stack[5]); - ClearStack(); - break; - case CLOSEPATH: /* - CLOSEPATH |- */ - /* Closes a subpath without repositioning the */ - /* current point */ - DoClosePath(); - ClearStack(); - break; - case CALLSUBR: /* subr# CALLSUBR - */ - /* Calls a CharString subroutine with index */ - /* subr# from the Subrs array */ - if (Top < 0) Error; - CallSubr((int)Stack[Top--]); - break; - case RETURN: /* - RETURN - */ - /* Returns from a Subrs array CharString */ - /* subroutine called with CALLSUBR */ - Return(); - break; - case ESCAPE: /* ESCAPE to two-byte command code */ - if (!DoRead(&Code)) Error; - Escape(Code); - break; - case HSBW: /* |- sbx wx HSBW |- */ - /* Set the left sidebearing point to (sbx,0), */ - /* set the character width vector to (wx,0). */ - /* Equivalent to sbx 0 wx 0 SBW. Space */ - /* character should have sbx = 0 */ - if (Top < 1) Error; - Sbw(Stack[0], 0.0, Stack[1], 0.0); - ClearStack(); - break; - case ENDCHAR: /* - ENDCHAR |- */ - /* Finishes a CharString outline */ - EndChar(); - ClearStack(); - break; - case RMOVETO: /* |- dx dy RMOVETO |- */ - /* Behaves like RMOVETO in PostScript */ - if (Top < 1) Error; - RMoveTo(Stack[0], Stack[1]); - ClearStack(); - break; - case HMOVETO: /* |- dx HMOVETO |- */ - /* Horizontal MOVETO. Equivalent to dx 0 RMOVETO */ - if (Top < 0) Error; - RMoveTo(Stack[0], 0.0); - ClearStack(); - break; - case VHCURVETO: /* |- dy1 dx2 dy2 dx3 VHCURVETO |- */ - /* Vertical-Horizontal CURVETO, equivalent to */ - /* 0 dy1 dx2 dy2 dx3 0 RRCURVETO */ - if (Top < 3) Error; - RRCurveTo(0.0, Stack[0], Stack[1], Stack[2], - Stack[3], 0.0); - ClearStack(); - break; - case HVCURVETO: /* |- dx1 dx2 dy2 dy3 HVCURVETO |- */ - /* Horizontal-Vertical CURVETO, equivalent to */ - /* dx1 0 dx2 dy2 0 dy3 RRCURVETO */ - if (Top < 3) Error; - RRCurveTo(Stack[0], 0.0, Stack[1], Stack[2], 0.0, Stack[3]); - ClearStack(); - break; - default: /* Unassigned command code */ - ClearStack(); - Error; - } -} - -static void -Escape(int Code) -{ - int i, Num; - struct segment *p; - - switch(Code) { - case DOTSECTION: /* - DOTSECTION |- */ - /* Brackets an outline section for the dots in */ - /* letters such as "i", "j", and "!". */ - DotSection(); - ClearStack(); - break; - case VSTEM3: /* |- x0 dx0 x1 dx1 x2 dx2 VSTEM3 |- */ - /* Declares the horizontal ranges of three */ - /* vertical stem zones between x0 and x0+dx0, */ - /* x1 and x1+dx1, and x2 and x2+dx2. */ - if (Top < 5) Error; - if (!wsset && ProcessHints) { - /* Shift the whole character so that the middle stem is centered. */ - p = CenterStem(Stack[2] + sidebearingX, Stack[3]); - path = Join(path, p); - wsset = 1; - } - - VStem(Stack[0], Stack[1]); - VStem(Stack[2], Stack[3]); - VStem(Stack[4], Stack[5]); - ClearStack(); - break; - case HSTEM3: /* |- y0 dy0 y1 dy1 y2 dy2 HSTEM3 |- */ - /* Declares the vertical ranges of three hori- */ - /* zontal stem zones between y0 and y0+dy0, */ - /* y1 and y1+dy1, and y2 and y2+dy2. */ - if (Top < 5) Error; - HStem(Stack[0], Stack[1]); - HStem(Stack[2], Stack[3]); - HStem(Stack[4], Stack[5]); - ClearStack(); - break; - case SEAC: /* |- asb adx ady bchar achar SEAC |- */ - /* Standard Encoding Accented Character. */ - if (Top < 4) Error; - Seac(Stack[0], Stack[1], Stack[2], - (unsigned char) Stack[3], - (unsigned char) Stack[4]); - ClearStack(); - break; - case SBW: /* |- sbx sby wx wy SBW |- */ - /* Set the left sidebearing point to (sbx,sby), */ - /* set the character width vector to (wx,wy). */ - if (Top < 3) Error; - Sbw(Stack[0], Stack[1], Stack[2], Stack[3]); - ClearStack(); - break; - case DIV: /* num1 num2 DIV quotient */ - /* Behaves like DIV in the PostScript language */ - if (Top < 1) Error; - Stack[Top-1] = Div(Stack[Top-1], Stack[Top]); - Top--; - break; - case CALLOTHERSUBR: - /* arg1 ... argn n othersubr# CALLOTHERSUBR - */ - /* Make calls on the PostScript interpreter */ - if (Top < 1) Error; - Num = Stack[Top-1]; - if (Top < Num+1) Error; - for (i = 0; i < Num; i++) PSFakePush(Stack[Top - i - 2]); - Top -= Num + 2; -#if XFONT_CID - if ((int)Stack[Top + Num + 2] > 3) - ClearPSFakeStack(); - else - CallOtherSubr((int)Stack[Top + Num + 2]); -#else - CallOtherSubr((int)Stack[Top + Num + 2]); -#endif - break; - case POP: /* - POP number */ - /* Removes a number from the top of the */ - /* PostScript interpreter stack and pushes it */ - /* onto the Type 1 BuildChar operand stack */ - Push(PSFakePop()); - break; - case SETCURRENTPOINT: /* |- x y SETCURRENTPOINT |- */ - /* Sets the current point to (x,y) in absolute */ - /* character space coordinates without per- */ - /* forming a CharString MOVETO command */ - if (Top < 1) Error; - SetCurrentPoint(Stack[0], Stack[1]); - ClearStack(); - break; - default: /* Unassigned escape code command */ - ClearStack(); - Error; - } -} - -/* |- y dy HSTEM |- */ -/* Declares the vertical range of a horizontal stem zone */ -/* between coordinates y and y + dy */ -/* y is relative to the left sidebearing point */ -static void -HStem(double y, double dy) -{ - if (ProcessHints) { - if (numstems >= MAXSTEMS) Error; - if (dy < 0.0) {y += dy; dy = -dy;} - stems[numstems].vertical = FALSE; - stems[numstems].x = 0.0; - stems[numstems].y = sidebearingY + y + wsoffsetY; - stems[numstems].dx = 0.0; - stems[numstems].dy = dy; - ComputeStem(numstems); - numstems++; - } -} - -/* |- x dx VSTEM |- */ -/* Declares the horizontal range of a vertical stem zone */ -/* between coordinates x and x + dx */ -/* x is relative to the left sidebearing point */ - -static void -VStem(double x, double dx) -{ - if (ProcessHints) { - if (numstems >= MAXSTEMS) Error; - if (dx < 0.0) {x += dx; dx = -dx;} - stems[numstems].vertical = TRUE; - stems[numstems].x = sidebearingX + x + wsoffsetX; - stems[numstems].y = 0.0; - stems[numstems].dx = dx; - stems[numstems].dy = 0.0; - ComputeStem(numstems); - numstems++; - } -} - -/* |- dx dy RLINETO |- */ -/* Behaves like RLINETO in PostScript */ -static void -RLineTo(double dx, double dy) -{ - struct segment *B; - - B = Loc(CharSpace, dx, dy); - - if (ProcessHints) { - currx += dx; - curry += dy; - /* B = Join(B, FindStems(currx, curry)); */ - B = Join(B, FindStems(currx, curry, dx, dy)); - } - - path = Join(path, Line(B)); -} - -/* |- dx1 dy1 dx2 dy2 dx3 dy3 RRCURVETO |- */ -/* Relative RCURVETO, equivalent to dx1 dy1 */ -/* (dx1+dx2) (dy1+dy2) (dx1+dx2+dx3) */ -/* (dy1+dy2+dy3) RCURVETO in PostScript */ -static void -RRCurveTo(double dx1, double dy1, double dx2, double dy2, - double dx3, double dy3) -{ - struct segment *B, *C, *D; - - B = Loc(CharSpace, dx1, dy1); - C = Loc(CharSpace, dx2, dy2); - D = Loc(CharSpace, dx3, dy3); - - if (ProcessHints) { - /* For a Bezier curve, we apply the full hint value to - the Bezier C point (and thereby D point). */ - currx += dx1 + dx2 + dx3; - curry += dy1 + dy2 + dy3; - /* C = Join(C, FindStems(currx, curry)); */ - C = Join(C, FindStems(currx, curry, dx3, dy3)); - } - - /* Since XIMAGER is not completely relative, */ - /* we need to add up the delta values */ - - C = Join(C, (struct segment *)Dup(B)); - D = Join(D, (struct segment *)Dup(C)); - - path = Join(path, (struct segment *)Bezier(B, C, D)); -} - -/* - CLOSEPATH |- */ -/* Closes a subpath WITHOUT repositioning the */ -/* current point */ -static void -DoClosePath(void) -{ - struct segment *CurrentPoint; - - CurrentPoint = Phantom(path); - path = ClosePath(path); - path = Join(Snap(path), CurrentPoint); -} - -/* subr# CALLSUBR - */ -/* Calls a CharString subroutine with index */ -/* subr# from the Subrs array */ -static void -CallSubr(int subrno) -{ - if ((subrno < 0) || (subrno >= SubrsP->len)) - Error; - PushCall(CharStringP, strindex, r); - CharStringP = &SubrsP->data.arrayP[subrno]; - StartDecrypt(); -} - -/* - RETURN - */ -/* Returns from a Subrs array CharString */ -/* subroutine called with CALLSUBR */ -static void -Return(void) -{ - PopCall(&CharStringP, &strindex, &r); -} - -/* - ENDCHAR |- */ -/* Finishes a CharString outline */ -/* Executes SETCHACHEDEVICE using a bounding box */ -/* it computes directly from the character outline */ -/* and using the width information acquired from a previous */ -/* HSBW or SBW. It then calls a special version of FILL */ -/* or STROKE depending on the value of PaintType in the */ -/* font dictionary */ -static void -EndChar(void) -{ - /* There is no need to compute and set bounding box for - the cache, since XIMAGER does that on the fly. */ - - /* Perform a Closepath just in case the command was left out */ - path = ClosePath(path); - - /* Set character width */ - path = Join(Snap(path), Loc(CharSpace, escapementX, escapementY)); - -} - -/* |- dx dy RMOVETO |- */ -/* Behaves like RMOVETO in PostScript */ -static void -RMoveTo(double dx, double dy) -{ - struct segment *B; - - B = Loc(CharSpace, dx, dy); - - if (ProcessHints) { - currx += dx; - curry += dy; - /* B = Join(B, FindStems(currx, curry)); */ - B = Join(B, FindStems(currx, curry, 0.0, 0.0)); - } - - path = Join(path, B); -} - -/* - DOTSECTION |- */ -/* Brackets an outline section for the dots in */ -/* letters such as "i", "j", and "!". */ -static void -DotSection(void) -{ - InDotSection = !InDotSection; -} - -/* |- asb adx ady bchar achar SEAC |- */ -/* Standard Encoding Accented Character. */ -static void -Seac(double asb, double adx, double ady, - unsigned char bchar, unsigned char achar) -{ - int Code; - struct segment *mypath; - - /* Move adx - asb, ady over and up from base char's sbpoint. */ - /* (We use adx - asb to counteract the accents sb shift.) */ - /* The variables accentoffsetX/Y modify sidebearingX/Y in Sbw(). */ - /* Note that these incorporate the base character's sidebearing shift by */ - /* using the current sidebearingX, Y values. */ - accentoffsetX = sidebearingX + adx - asb; - accentoffsetY = sidebearingY + ady; - - /* Set path = NULL to avoid complaints from Sbw(). */ - path = NULL; - - /* Go find the CharString for the accent's code via an upcall */ - CharStringP = GetType1CharString((psfont *)Environment, achar); - StartDecrypt(); - - ClearStack(); - ClearPSFakeStack(); - ClearCallStack(); - - for (;;) { - if (!DoRead(&Code)) break; - Decode(Code); - if (errflag) return; - } - /* Copy snapped path to mypath and set path to NULL as above. */ - mypath = Snap(path); - path = NULL; - - /* We must reset these to null now. */ - accentoffsetX = accentoffsetY = 0; - - /* go find the CharString for the base char's code via an upcall */ - CharStringP = GetType1CharString((psfont *)Environment, bchar); - StartDecrypt(); - - ClearStack(); - ClearPSFakeStack(); - ClearCallStack(); - - FinitStems(); - InitStems(); - - for (;;) { - if (!DoRead(&Code)) break; - Decode(Code); - if (errflag) return; - } - path = Join(mypath, path); -} - - -/* |- sbx sby wx wy SBW |- */ -/* Set the left sidebearing point to (sbx,sby), */ -/* set the character width vector to (wx,wy). */ -static void -Sbw(double sbx, double sby, double wx, double wy) -{ - escapementX = wx; /* Character width vector */ - escapementY = wy; - - /* Sidebearing values are sbx, sby args, plus accent offset from Seac(). */ - sidebearingX = sbx + accentoffsetX; - sidebearingY = sby + accentoffsetY; - - path = Join(path, Loc(CharSpace, sidebearingX, sidebearingY)); - if (ProcessHints) {currx = sidebearingX; curry = sidebearingY;} -} - - /* num1 num2 DIV quotient */ -/* Behaves like DIV in the PostScript language */ -static double -Div(double num1, double num2) -{ - return(num1 / num2); -} - -/* - The following four subroutines (FlxProc, FlxProc1, FlxProc2, and - HintReplace) are C versions of the OtherSubrs Programs, which were - were published in the Adobe Type 1 Font Format book. - - The Flex outline fragment is described by - c1: (x0, y0) = c3: (x0, yshrink(y0)) or (xshrink(x0), y0) - " (x1, y1) = " (x1, yshrink(y1)) or (xshrink(x1), y1) - " (x2, y2) - reference point - c2: (x0, y0) = c4: (x0, yshrink(y0)) or (xshrink(x0), y0) - " (x1, y1) = " (x1, yshrink(y1)) or (xshrink(x1), y1) - " (x2, y2) = " (x2, y2), rightmost endpoint - c3: (x0, y0) - control point, 1st Bezier curve - " (x1, y1) - control point, -"- - " (x2, y2) - end point, -"- - c4: (x0, y0) - control point, 2nd Bezier curve - " (x1, y1) - control point, -"- - " (x2, y2) - end point, -"- - ep: (epY, epX) - final endpoint (should be same as c4: (x2, y2)) - idmin - minimum Flex height (1/100 pixel) at which to render curves -*/ - -#define dtransform(dxusr,dyusr,dxdev,dydev) { \ - register struct segment *point = Loc(CharSpace, dxusr, dyusr); \ - QueryLoc(point, IDENTITY, dxdev, dydev); \ - Destroy(point); \ -} - -#define itransform(xdev,ydev,xusr,yusr) { \ - register struct segment *point = Loc(IDENTITY, xdev, ydev); \ - QueryLoc(point, CharSpace, xusr, yusr); \ - Destroy(point); \ -} - -#define transform(xusr,yusr,xdev,ydev) dtransform(xusr,yusr,xdev,ydev) - -#define PaintType (0) - -#define lineto(x,y) { \ - struct segment *CurrentPoint; \ - double CurrentX, CurrentY; \ - CurrentPoint = Phantom(path); \ - QueryLoc(CurrentPoint, CharSpace, &CurrentX, &CurrentY); \ - Destroy(CurrentPoint); \ - RLineTo(x - CurrentX, y - CurrentY); \ -} - -#define curveto(x0,y0,x1,y1,x2,y2) { \ - struct segment *CurrentPoint; \ - double CurrentX, CurrentY; \ - CurrentPoint = Phantom(path); \ - QueryLoc(CurrentPoint, CharSpace, &CurrentX, &CurrentY); \ - Destroy(CurrentPoint); \ - RRCurveTo(x0 - CurrentX, y0 - CurrentY, x1 - x0, y1 - y0, x2 - x1, y2 - y1); \ -} - -#define xshrink(x) ((x - c4x2) * shrink +c4x2) -#define yshrink(y) ((y - c4y2) * shrink +c4y2) - -#define PickCoords(flag) \ - if (flag) { /* Pick "shrunk" coordinates */ \ - x0 = c1x0; y0 = c1y0; \ - x1 = c1x1; y1 = c1y1; \ - x2 = c1x2; y2 = c1y2; \ - x3 = c2x0; y3 = c2y0; \ - x4 = c2x1; y4 = c2y1; \ - x5 = c2x2; y5 = c2y2; \ - } else { /* Pick original coordinates */ \ - x0 = c3x0; y0 = c3y0; \ - x1 = c3x1; y1 = c3y1; \ - x2 = c3x2; y2 = c3y2; \ - x3 = c4x0; y3 = c4y0; \ - x4 = c4x1; y4 = c4y1; \ - x5 = c4x2; y5 = c4y2; \ - } - -/* FlxProc() = OtherSubrs[0]; Main part of Flex */ -/* Calling sequence: 'idmin epX epY 3 0 callothersubr' */ -/* Computes Flex values, and renders the Flex path, */ -/* and returns (leaves) ending coordinates on stack */ -static void -FlxProc(double c1x2, double c1y2, double c3x0, double c3y0, - double c3x1, double c3y1, double c3x2, double c3y2, - double c4x0, double c4y0, double c4x1, double c4y1, - double c4x2, double c4y2, double epY, double epX, int idmin) -{ - double dmin; - double c1x0, c1y0, c1x1, c1y1; - double c2x0, c2y0, c2x1, c2y1, c2x2, c2y2; - char yflag; - double x0, y0, x1, y1, x2, y2, x3, y3, x4, y4, x5, y5; - double cxx, cyx, cxy, cyy; /* Transformation matrix */ - int flipXY; - double x, y; - double erosion = 1; /* Device parameter */ - /* Erosion may have different value specified in 'internaldict' */ - double shrink; - double dX, dY; - char erode; - double eShift; - double cx, cy; - double ex, ey; - - c1x0 = c1y0 = c1x1 = c1y1 = c2x0 = c2y0 = c2x1 = c2y1 = c2x2 = c2y2 = 0.0; - - Destroy(path); - path = FlxOldPath; /* Restore previous path (stored in FlxProc1) */ - - if (ProcessHints) { - dmin = ABS(idmin) / 100.0; /* Minimum Flex height in pixels */ - - c2x2 = c4x2; c2y2 = c4y2; /* Point c2 = c4 */ - - yflag = FABS(c1y2 - c3y2) > FABS(c1x2 - c3x2); /* Flex horizontal? */ - - QuerySpace(CharSpace, &cxx, &cyx, &cxy, &cyy); /* Transformation matrix */ - - if (FABS(cxx) < 0.00001 || FABS(cyy) < 0.00001) - flipXY = -1; /* Char on side */ - else if (FABS(cyx) < 0.00001 || FABS(cxy) < 0.00001) - flipXY = 1; /* Char upright */ - else - flipXY = 0; /* Char at angle */ - - if (yflag) { /* Flex horizontal */ - if (flipXY == 0 || c3y2 == c4y2) { /* Char at angle or Flex height = 0 */ - PickCoords(FALSE); /* Pick original control points */ - } else { - shrink = FABS((c1y2 - c4y2) / (c3y2 - c4y2)); /* Slope */ - - c1x0 = c3x0; c1y0 = yshrink(c3y0); - c1x1 = c3x1; c1y1 = yshrink(c3y1); - c2x0 = c4x0; c2y0 = yshrink(c4y0); - c2x1 = c4x1; c2y1 = yshrink(c4y1); - - dtransform(0.0, ROUND(c3y2-c1y2), &x, &y); /* Flex height in pixels */ - dY = FABS((flipXY == 1) ? y : x); - PickCoords(dY < dmin); /* If Flex small, pick 'shrunk' control points */ - - if (FABS(y2 - c1y2) > 0.001) { /* Flex 'non-zero'? */ - transform(c1x2, c1y2, &x, &y); - - if (flipXY == 1) { - cx = x; cy = y; - } else { - cx = y; cy = x; - } - - dtransform(0.0, ROUND(y2-c1y2), &x, &y); - dY = (flipXY == 1) ? y : x; - if (ROUND(dY) != 0) - dY = ROUND(dY); - else - dY = (dY < 0) ? -1 : 1; - - erode = PaintType != 2 && erosion >= 0.5; - if (erode) - cy -= 0.5; - ey = cy + dY; - ey = CEIL(ey) - ey; - ey = ey + FLOOR(cy + dY); - if (erode) - ey += 0.5; - - if (flipXY == 1) { - itransform(cx, ey, &x, &y); - } else { - itransform(ey, cx, &x, &y); - } - - eShift = y - y2; - y1 += eShift; - y2 += eShift; - y3 += eShift; - } - } - } else { /* Flex vertical */ - if (flipXY == 0 || c3x2 == c4x2) { /* Char at angle or Flex height = 0 */ - PickCoords(FALSE); /* Pick original control points */ - } else { - shrink = FABS((c1x2 - c4x2) / (c3x2 - c4x2)); /* Slope */ - - c1x0 = xshrink(c3x0); c1y0 = c3y0; - c1x1 = xshrink(c3x1); c1y1 = c3y1; - c2x0 = xshrink(c4x0); c2y0 = c4y0; - c2x1 = xshrink(c4x1); c2y1 = c4y1; - - dtransform(ROUND(c3x2 - c1x2), 0.0, &x, &y); /* Flex height in pixels */ - dX = FABS((flipXY == -1) ? y : x); - PickCoords(dX < dmin); /* If Flex small, pick 'shrunk' control points */ - - if (FABS(x2 - c1x2) > 0.001) { - transform(c1x2, c1y2, &x, &y); - if (flipXY == -1) { - cx = y; cy = x; - } else { - cx = x; cy = y; - } - - dtransform(ROUND(x2-c1x2), 0.0, &x, &y); - dX = (flipXY == -1) ? y : x; - if (ROUND(dX) != 0) - dX = ROUND(dX); - else - dX = (dX < 0) ? -1 : 1; - - erode = PaintType != 2 && erosion >= 0.5; - if (erode) - cx -= 0.5; - ex = cx + dX; - ex = CEIL(ex) - ex; - ex = ex + FLOOR(cx + dX); - if (erode) - ex += 0.5; - - if (flipXY == -1) { - itransform(cy, ex, &x, &y); - } else { - itransform(ex, cy, &x, &y); - } - - eShift = x - x2; - x1 += eShift; - x2 += eShift; - x3 += eShift; - } - } - } - - if (x2 == x5 || y2 == y5) { - lineto(x5, y5); - } else { - curveto(x0, y0, x1, y1, x2, y2); - curveto(x3, y3, x4, y4, x5, y5); - } - } else { /* ProcessHints is off */ - PickCoords(FALSE); /* Pick original control points */ - curveto(x0, y0, x1, y1, x2, y2); - curveto(x3, y3, x4, y4, x5, y5); - } - - PSFakePush(epY); - PSFakePush(epX); -} - -/* FlxProc1() = OtherSubrs[1]; Part of Flex */ -/* Calling sequence: '0 1 callothersubr' */ -/* Saves and clears path, then restores currentpoint */ -static void -FlxProc1(void) -{ - struct segment *CurrentPoint; - - CurrentPoint = Phantom(path); - - FlxOldPath = path; - path = CurrentPoint; -} - -/* FlxProc2() = OtherSubrs[2]; Part of Flex */ -/* Calling sequence: '0 2 callothersubr' */ -/* Returns currentpoint on stack */ -static void -FlxProc2(void) -{ - struct segment *CurrentPoint; - double CurrentX, CurrentY; - - CurrentPoint = Phantom(path); - QueryLoc(CurrentPoint, CharSpace, &CurrentX, &CurrentY); - Destroy(CurrentPoint); - - /* Push CurrentPoint on fake PostScript stack */ - PSFakePush(CurrentX); - PSFakePush(CurrentY); -} - -/* HintReplace() = OtherSubrs[3]; Hint Replacement */ -/* Calling sequence: 'subr# 1 3 callothersubr pop callsubr' */ -/* Reinitializes stem hint structure */ -static void -HintReplace(void) -{ - /* Effectively retire the current stems, but keep them around for */ - /* revhint use in case we are in a stem when we replace hints. */ - currstartstem = numstems; - - /* 'subr#' is left on PostScript stack (for 'pop callsubr') */ -} - -/* arg1 ... argn n othersubr# CALLOTHERSUBR - */ -/* Make calls on the PostScript interpreter (or call equivalent C code) */ -/* NOTE: The n arguments have been pushed on the fake PostScript stack */ -static void -CallOtherSubr(int othersubrno) -{ - switch(othersubrno) { - case 0: /* OtherSubrs[0]; Main part of Flex */ - if (PSFakeTop < 16) Error; - ClearPSFakeStack(); - FlxProc( - PSFakeStack[0], PSFakeStack[1], PSFakeStack[2], PSFakeStack[3], - PSFakeStack[4], PSFakeStack[5], PSFakeStack[6], PSFakeStack[7], - PSFakeStack[8], PSFakeStack[9], PSFakeStack[10], PSFakeStack[11], - PSFakeStack[12], PSFakeStack[13], PSFakeStack[14], PSFakeStack[15], - (int) PSFakeStack[16] - ); - break; - case 1: /* OtherSubrs[1]; Part of Flex */ - FlxProc1(); - break; - case 2: /* OtherSubrs[2]; Part of Flex */ - FlxProc2(); - break; - case 3: /* OtherSubrs[3]; Hint Replacement */ - HintReplace(); - break; - default: { /* call OtherSubrs[4] or higher if PostScript is present */ - } - } -} - -/* |- x y SETCURRENTPOINT |- */ -/* Sets the current point to (x,y) in absolute */ -/* character space coordinates without per- */ -/* forming a CharString MOVETO command */ -static void -SetCurrentPoint(double x, double y) -{ - currx = x; - curry = y; -} - -/* The Type1Char routine for use by PostScript. */ -/************************************************/ -struct xobject * -Type1Char(char *env, struct XYspace *S, psobj *charstrP, psobj *subrsP, - psobj *osubrsP, - struct blues_struct *bluesP, /* FontID's ptr to the blues struct */ - int *modeP) -{ - int Code; - - path = NULL; - errflag = FALSE; - - /* Make parameters available to all Type1 routines */ - Environment = env; - CharSpace = S; /* used when creating path elements */ - CharStringP = charstrP; - SubrsP = subrsP; - - blues = bluesP; - - /* compute the alignment zones */ - ComputeAlignmentZones(); - - StartDecrypt(); - - ClearStack(); - ClearPSFakeStack(); - ClearCallStack(); - - InitStems(); - - currx = curry = 0; - escapementX = escapementY = 0; - sidebearingX = sidebearingY = 0; - accentoffsetX = accentoffsetY = 0; - wsoffsetX = wsoffsetY = 0; /* No shift to preserve whitspace. */ - wsset = 0; /* wsoffsetX,Y haven't been set yet. */ - - for (;;) { - if (!DoRead(&Code)) break; - Decode(Code); - if (errflag) break; - } - - FinitStems(); - - - /* Clean up if an error has occurred */ - if (errflag) { - if (path != NULL) { - Destroy(path); /* Reclaim storage */ - path = NULL; /* Indicate that character could not be built */ - } - } - - return((struct xobject *) path); -} - -#if XFONT_CID -struct xobject * -CIDChar(char *env, struct XYspace *S, - psobj *charstrP, psobj *subrsP, psobj *osubrsP, - struct blues_struct *bluesP, /* FontID's ptr to the blues struct */ - int *modeP) -{ - int Code; - - path = NULL; - errflag = FALSE; - - /* Make parameters available to all CID routines */ - Environment = env; - CharSpace = S; /* used when creating path elements */ - CharStringP = charstrP; - SubrsP = subrsP; - - blues = bluesP; - - /* compute the alignment zones */ - ComputeAlignmentZones(); - - StartDecrypt(); - - ClearStack(); - ClearPSFakeStack(); - ClearCallStack(); - - InitStems(); - - currx = curry = 0; - escapementX = escapementY = 0; - sidebearingX = sidebearingY = 0; - accentoffsetX = accentoffsetY = 0; - wsoffsetX = wsoffsetY = 0; /* No shift to preserve whitspace. */ - wsset = 0; /* wsoffsetX,Y haven't been set yet. */ - - for (;;) { - if (!DoRead(&Code)) break; - Decode(Code); - if (errflag) break; - } - - FinitStems(); - - /* Clean up if an error has occurred */ - if (errflag) { - if (path != NULL) { - Destroy(path); /* Reclaim storage */ - path = NULL; /* Indicate that character could not be built */ - } - } - - return((struct xobject *) path); -} -#endif |