287 lines
9.5 KiB
C
287 lines
9.5 KiB
C
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/***
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**
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** Module: PFM
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**
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** Description:
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** This is a module of the T1 to TT font converter. The module
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** will extract information from a T1 font metrics file, by parsing
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** the data/commands found in a PFM file.
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**
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** Please note that all data stored in a PFM file is represented
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** in the little-endian order.
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**
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** Author: Michael Jansson
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**
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** Created: 5/26/93
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**
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***/
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/**** INCLUDES */
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/* General types and definitions. */
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#include <string.h>
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/* Special types and definitions. */
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#include "titott.h"
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#include "types.h"
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#include "safemem.h"
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#include "metrics.h"
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#include "t1msg.h"
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/* Module dependent types and prototypes. */
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#include "fileio.h"
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/***** CONSTANTS */
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/*-none-*/
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/***** LOCAL TYPES */
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/*-none-*/
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/***** MACROS */
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/*-none-*/
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/***** STATIC FUNCTIONS */
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/***
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** Function: GetNextWord
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**
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** Description:
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** This function pulls two bytes from a file
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** and convert them into a 16-bit integer.
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***/
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static short GetNextWord(struct ioFile *file)
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{
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short iWord;
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iWord = (short)io_ReadOneByte(file);
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iWord |= (short)(io_ReadOneByte(file) * 256);
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return(iWord);
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}
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/***
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** Function: GetLong
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**
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** Description:
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** This function pulls four bytes from a file
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** and convert them into a 32-bit integer.
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***/
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static long GetLong(struct ioFile *file)
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{
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short low;
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short high;
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low = GetNextWord(file);
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high = GetNextWord(file);
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return (long)((long)low+((long)high * 65535L));
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}
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/***
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** Function: ReadString
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**
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** Description:
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** This function pulls a null terminated
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** string from the file.
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***/
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static void ReadString(UBYTE *dst, int size, struct ioFile *file)
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{
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int i;
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i=0;
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while (io_FileError(file)==SUCCESS && i<size) {
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dst[i] = (UBYTE)io_ReadOneByte(file);
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if (dst[i]=='\0')
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break;
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i++;
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}
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}
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/***** FUNCTIONS */
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/***
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** Function: ReadPFMMetrics
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**
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** Description:
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** This function parses a Printer Font Metrics
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** (*.pfm) file.
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***/
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errcode ReadPFMMetrics(const char *metrics, struct T1Metrics *t1m)
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{
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errcode status = SUCCESS;
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struct ioFile *file;
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UBYTE buf[256];
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long kernoffset;
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long widthoffset;
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long etmoffset;
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long faceoffset;
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short ver;
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short i;
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if (metrics==NULL || (file = io_OpenFile(metrics, READONLY))==NULL) {
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status = NOMETRICS;
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} else {
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(void)io_ReadOneByte(file); /* Skip the revision number. */
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ver = (short)io_ReadOneByte(file);
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if (ver>3) {
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SetError(status=UNSUPPORTEDFORMAT);
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} else {
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(void)GetLong(file); /* dfSize */
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/* Get Copyright */
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if (t1m->copyright)
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Free(t1m->copyright);
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if ((t1m->copyright = Malloc(60))==NULL) {
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SetError(status=NOMEM);
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} else {
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(void)io_ReadBytes((UBYTE *)t1m->copyright, (USHORT)60, file);
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(void)GetNextWord(file); /* dfType */
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(void)GetNextWord(file); /* dfPoints */
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(void)GetNextWord(file); /* dfVertRes */
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(void)GetNextWord(file); /* dfHorizRes */
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t1m->ascent = GetNextWord(file); /* dfAscent */
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t1m->intLeading = GetNextWord(file); /* dfInternalLeading */
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t1m->extLeading = GetNextWord(file); /* dfExternalLeading */
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(void)io_ReadOneByte(file); /* dfItalic */
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(void)io_ReadOneByte(file); /* dfUnderline */
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(void)io_ReadOneByte(file); /* dfStrikeOut */
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t1m->tmweight = (USHORT)GetNextWord(file); /* dfWeight */
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t1m->CharSet = (UBYTE)io_ReadOneByte(file); /* dfCharSet */
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(void)GetNextWord(file); /* dfPixWidth */
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(void)GetNextWord(file); /* dfPixHeight */
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t1m->pitchfam = (UBYTE)io_ReadOneByte(file);/* dfPitchAndFamily */
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t1m->avgCharWidth = GetNextWord(file); /* dfAvgWidth */
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(void)GetNextWord(file); /* dfMaxWidth */
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t1m->firstChar = (UBYTE)io_ReadOneByte(file); /* dfFirstChar */
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t1m->lastChar = (UBYTE)io_ReadOneByte(file); /* dfLastChar */
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t1m->DefaultChar = (UBYTE)io_ReadOneByte(file); /* dfDefaultChar */
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t1m->BreakChar = (UBYTE)io_ReadOneByte(file); /* dfBreakChar */
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(void)GetNextWord(file); /* dfWidthBytes */
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(void)GetLong(file); /* dfDevice */
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faceoffset = GetLong(file); /* dfFace */
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(void)GetLong(file); /* dfBitsPointer */
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(void)GetLong(file); /* dfBitsOffset */
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(void)GetNextWord(file); /* dfSizeFields */
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etmoffset = GetLong(file); /* dfExtMetricsOffset */
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widthoffset = GetLong(file); /* dfExtentTable */
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(void)GetLong(file); /* dfOriginTable */
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kernoffset = GetLong(file); /* dfPairKernTable */
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(void)GetLong(file); /* dfTrackKernTable */
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(void)GetLong(file); /* dfDriverInfo */
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(void)GetLong(file); /* dfReserved */
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if (io_FileError(file)!=SUCCESS) {
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SetError(status = BADMETRICS);
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}
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/* Get extended type metrics */
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(void)io_FileSeek(file, etmoffset);
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(void)GetNextWord(file); /* etmSize */
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(void)GetNextWord(file); /* etmPointSize */
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(void)GetNextWord(file); /* etmOrientation */
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(void)GetNextWord(file); /* etmMasterHeight */
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(void)GetNextWord(file); /* etmMinScale */
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(void)GetNextWord(file); /* etmMaxScale */
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(void)GetNextWord(file); /* etmMasterUnits */
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(void)GetNextWord(file); /* etmCapHeight */
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(void)GetNextWord(file); /* etmXHeight */
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(void)GetNextWord(file); /* etmLowerCaseAscent */
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t1m->descent = GetNextWord(file); /* etmLowerCaseDecent */
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(void)GetNextWord(file); /* etmSlant */
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t1m->superoff = GetNextWord(file); /* etmSuperScript */
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t1m->suboff = GetNextWord(file); /* etmSubScript */
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t1m->supersize = GetNextWord(file); /* etmSuperScriptSize */
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t1m->subsize = GetNextWord(file); /* etmSubScriptSize */
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(void)GetNextWord(file); /* etmUnderlineOffset */
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(void)GetNextWord(file); /* etmUnderlineWidth */
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(void)GetNextWord(file); /* etmDoubleUpperUnderlineOffset*/
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(void)GetNextWord(file); /* etmDoubleLowerUnderlineOffset*/
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(void)GetNextWord(file); /* etmDoubleUpperUnderlineWidth */
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(void)GetNextWord(file); /* etmDoubleLowerUnderlineWidth */
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t1m->strikeoff = GetNextWord(file); /* etmStrikeOutOffset */
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t1m->strikesize = GetNextWord(file); /* etmStrikeOutWidth */
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(void)GetNextWord(file); /* etmNKernPairs */
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(void)GetNextWord(file); /* etmNKernTracks */
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/* Get the advance width for the characters. */
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if ((t1m->widths = Malloc(sizeof(funit)*
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(t1m->lastChar -
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t1m->firstChar + 1)))==NULL) {
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SetError(status=NOMEM);
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} else {
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(void)io_FileSeek(file, widthoffset);
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for (i=0; i<=t1m->lastChar-t1m->firstChar; i++)
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t1m->widths[i] = GetNextWord(file);
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if (io_FileError(file)!=SUCCESS) {
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SetError(status = BADMETRICS);
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}
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}
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/* Get the face name. */
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if ((status==SUCCESS) && faceoffset) {
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(void)io_FileSeek(file, faceoffset);
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if (t1m->family)
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Free(t1m->family);
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ReadString(buf, sizeof(buf), file);
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if (io_FileError(file)) {
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SetError(status = BADMETRICS);
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} else {
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if ((t1m->family = Strdup((char*)buf))==NULL) {
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SetError(status=NOMEM);
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}
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}
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}
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/* Get the pair-kerning the typeface. */
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if ((status==SUCCESS) && kernoffset) {
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(void)io_FileSeek(file, kernoffset);
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t1m->kernsize = (USHORT)GetNextWord(file);
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if (io_FileError(file)!=SUCCESS) {
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SetError(status = BADMETRICS);
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} else {
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if ((t1m->kerns = Malloc(sizeof(struct kerning)*
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t1m->kernsize))==NULL) {
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SetError(status=NOMEM);
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} else {
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for (i=0; i<(int)t1m->kernsize; i++) {
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t1m->kerns[i].left = (UBYTE)io_ReadOneByte(file);
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t1m->kerns[i].right = (UBYTE)io_ReadOneByte(file);
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t1m->kerns[i].delta = GetNextWord(file);
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}
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if (io_FileError(file)!=SUCCESS) {
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SetError(status = BADMETRICS);
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}
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}
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}
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}
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}
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}
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if (io_CloseFile(file)!=SUCCESS)
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status = BADMETRICS;
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}
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return status;
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}
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