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Sweden-Number/graphics/psdrv/afm.c

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/*
* Adobe Font Metric (AFM) file parsing
* See http://www.adobe.com/supportservice/devrelations/PDFS/TN/5004.AFM_Spec.pdf
*
* Copyright 1998 Huw D M Davies
*
*/
#include <string.h>
#include <stdio.h>
#include "winnt.h" /* HEAP_ZERO_MEMORY */
#include "psdrv.h"
#include "options.h"
#include "debugtools.h"
#include "heap.h"
DEFAULT_DEBUG_CHANNEL(psdrv);
#include <ctype.h>
/* ptr to fonts for which we have afm files */
FONTFAMILY *PSDRV_AFMFontList = NULL;
/***********************************************************
*
* PSDRV_AFMGetCharMetrics
*
* Parses CharMetric section of AFM file.
*
* Actually only collects the widths of numbered chars and puts then in
* afm->CharWidths.
*/
static void PSDRV_AFMGetCharMetrics(AFM *afm, FILE *fp)
{
char line[256], valbuf[256];
char *cp, *item, *value, *curpos, *endpos;
int i;
AFMMETRICS **insert = &afm->Metrics, *metric;
for(i = 0; i < afm->NumofMetrics; i++) {
if(!fgets(line, sizeof(line), fp)) {
ERR("Unexpected EOF\n");
return;
}
metric = *insert = HeapAlloc( PSDRV_Heap, HEAP_ZERO_MEMORY,
sizeof(AFMMETRICS) );
insert = &metric->next;
cp = line + strlen(line);
do {
*cp = '\0';
cp--;
} while(cp > line && isspace(*cp));
curpos = line;
while(*curpos) {
item = curpos;
while(isspace(*item))
item++;
value = strpbrk(item, " \t");
while(isspace(*value))
value++;
cp = endpos = strchr(value, ';');
while(isspace(*--cp))
;
memcpy(valbuf, value, cp - value + 1);
valbuf[cp - value + 1] = '\0';
value = valbuf;
if(!strncmp(item, "C ", 2)) {
value = strchr(item, ' ');
sscanf(value, " %d", &metric->C);
} else if(!strncmp(item, "CH ", 3)) {
value = strrchr(item, ' ');
sscanf(value, " %x", &metric->C);
}
else if(!strncmp("WX ", item, 3) || !strncmp("W0X ", item, 4)) {
sscanf(value, "%f", &metric->WX);
if(metric->C >= 0 && metric->C <= 0xff)
afm->CharWidths[metric->C] = metric->WX;
}
else if(!strncmp("N ", item, 2)) {
metric->N = HEAP_strdupA( PSDRV_Heap, 0, value);
}
else if(!strncmp("B ", item, 2)) {
sscanf(value, "%f%f%f%f", &metric->B.llx, &metric->B.lly,
&metric->B.urx, &metric->B.ury);
/* Store height of Aring to use as lfHeight */
if(metric->N && !strncmp(metric->N, "Aring", 5))
afm->FullAscender = metric->B.ury;
}
/* Ligatures go here... */
curpos = endpos + 1;
}
#if 0
TRACE("Metrics for '%s' WX = %f B = %f,%f - %f,%f\n",
metric->N, metric->WX, metric->B.llx, metric->B.lly,
metric->B.urx, metric->B.ury);
#endif
}
return;
}
/***********************************************************
*
* PSDRV_AFMParse
*
* Fills out an AFM structure and associated substructures (see psdrv.h)
* for a given AFM file. All memory is allocated from the process heap.
* Returns a ptr to the AFM structure or NULL on error.
*
* This is not complete (we don't handle kerning yet) and not efficient
*/
static AFM *PSDRV_AFMParse(char const *file)
{
FILE *fp;
char buf[256];
char *value;
AFM *afm;
char *cp;
TRACE("parsing '%s'\n", file);
if((fp = fopen(file, "r")) == NULL) {
MESSAGE("Can't open AFM file '%s'. Please check wine.conf .\n", file);
return NULL;
}
afm = HeapAlloc(PSDRV_Heap, HEAP_ZERO_MEMORY, sizeof(AFM));
if(!afm) {
fclose(fp);
return NULL;
}
while(fgets(buf, sizeof(buf), fp)) {
cp = buf + strlen(buf);
do {
*cp = '\0';
cp--;
} while(cp > buf && isspace(*cp));
value = strchr(buf, ' ');
if(value)
while(isspace(*value))
value++;
if(!strncmp("FontName", buf, 8)) {
afm->FontName = HEAP_strdupA(PSDRV_Heap, 0, value);
continue;
}
if(!strncmp("FullName", buf, 8)) {
afm->FullName = HEAP_strdupA(PSDRV_Heap, 0, value);
continue;
}
if(!strncmp("FamilyName", buf, 10)) {
afm->FamilyName = HEAP_strdupA(PSDRV_Heap, 0, value);
continue;
}
if(!strncmp("Weight", buf, 6)) {
if(!strncmp("Roman", value, 5) || !strncmp("Medium", value, 6)
|| !strncmp("Book", value, 4) || !strncmp("Regular", value, 7)
|| !strncmp("Normal", value, 6))
afm->Weight = FW_NORMAL;
else if(!strncmp("Demi", value, 4))
afm->Weight = FW_DEMIBOLD;
else if(!strncmp("Bold", value, 4))
afm->Weight = FW_BOLD;
else if(!strncmp("Light", value, 5))
afm->Weight = FW_LIGHT;
else {
FIXME("Unkown AFM Weight '%s'\n", value);
afm->Weight = FW_NORMAL;
}
continue;
}
if(!strncmp("ItalicAngle", buf, 11)) {
sscanf(value, "%f", &(afm->ItalicAngle));
continue;
}
if(!strncmp("IsFixedPitch", buf, 12)) {
if(!strncasecmp("false", value, 5))
afm->IsFixedPitch = FALSE;
else
afm->IsFixedPitch = TRUE;
continue;
}
if(!strncmp("FontBBox", buf, 8)) {
sscanf(value, "%f %f %f %f", &(afm->FontBBox.llx),
&(afm->FontBBox.lly), &(afm->FontBBox.urx),
&(afm->FontBBox.ury) );
continue;
}
if(!strncmp("UnderlinePosition", buf, 17)) {
sscanf(value, "%f", &(afm->UnderlinePosition) );
continue;
}
if(!strncmp("UnderlineThickness", buf, 18)) {
sscanf(value, "%f", &(afm->UnderlineThickness) );
continue;
}
if(!strncmp("CapHeight", buf, 9)) {
sscanf(value, "%f", &(afm->CapHeight) );
continue;
}
if(!strncmp("XHeight", buf, 7)) {
sscanf(value, "%f", &(afm->XHeight) );
continue;
}
if(!strncmp("Ascender", buf, 8)) {
sscanf(value, "%f", &(afm->Ascender) );
continue;
}
if(!strncmp("Descender", buf, 9)) {
sscanf(value, "%f", &(afm->Descender) );
continue;
}
if(!strncmp("StartCharMetrics", buf, 16)) {
sscanf(value, "%d", &(afm->NumofMetrics) );
PSDRV_AFMGetCharMetrics(afm, fp);
continue;
}
if(!strncmp("EncodingScheme", buf, 14)) {
afm->EncodingScheme = HEAP_strdupA(PSDRV_Heap, 0, value);
continue;
}
}
fclose(fp);
if(afm->Ascender == 0.0)
afm->Ascender = afm->FontBBox.ury;
if(afm->Descender == 0.0)
afm->Descender = afm->FontBBox.lly;
if(afm->FullAscender == 0.0)
afm->FullAscender = afm->Ascender;
return afm;
}
/***********************************************************
*
* PSDRV_FreeAFMList
*
* Frees the family and afmlistentry structures in list head
*/
void PSDRV_FreeAFMList( FONTFAMILY *head )
{
AFMLISTENTRY *afmle, *nexta;
FONTFAMILY *family, *nextf;
for(nextf = family = head; nextf; family = nextf) {
for(nexta = afmle = family->afmlist; nexta; afmle = nexta) {
nexta = afmle->next;
HeapFree( PSDRV_Heap, 0, afmle );
}
nextf = family->next;
HeapFree( PSDRV_Heap, 0, family );
}
return;
}
/***********************************************************
*
* PSDRV_FindAFMinList
* Returns ptr to an AFM if name (which is a PS font name) exists in list
* headed by head.
*/
AFM *PSDRV_FindAFMinList(FONTFAMILY *head, char *name)
{
FONTFAMILY *family;
AFMLISTENTRY *afmle;
for(family = head; family; family = family->next) {
for(afmle = family->afmlist; afmle; afmle = afmle->next) {
if(!strcmp(afmle->afm->FontName, name))
return afmle->afm;
}
}
return NULL;
}
/***********************************************************
*
* PSDRV_AddAFMtoList
*
* Adds an afm to the list whose head is pointed to by head. Creates new
* family node if necessary and always creates a new AFMLISTENTRY.
*/
void PSDRV_AddAFMtoList(FONTFAMILY **head, AFM *afm)
{
FONTFAMILY *family = *head;
FONTFAMILY **insert = head;
AFMLISTENTRY *tmpafmle, *newafmle;
newafmle = HeapAlloc(PSDRV_Heap, HEAP_ZERO_MEMORY,
sizeof(*newafmle));
newafmle->afm = afm;
while(family) {
if(!strcmp(family->FamilyName, afm->FamilyName))
break;
insert = &(family->next);
family = family->next;
}
if(!family) {
family = HeapAlloc(PSDRV_Heap, HEAP_ZERO_MEMORY,
sizeof(*family));
*insert = family;
family->FamilyName = HEAP_strdupA(PSDRV_Heap, 0,
afm->FamilyName);
family->afmlist = newafmle;
return;
}
tmpafmle = family->afmlist;
while(tmpafmle->next)
tmpafmle = tmpafmle->next;
tmpafmle->next = newafmle;
return;
}
/**********************************************************
*
* PSDRV_ReencodeCharWidths
*
* Re map the CharWidths field of the afm to correspond to an ANSI encoding
*
*/
static void PSDRV_ReencodeCharWidths(AFM *afm)
{
int i;
AFMMETRICS *metric;
for(i = 0; i < 256; i++) {
if(isalnum(i))
continue;
if(PSDRV_ANSIVector[i] == NULL) {
afm->CharWidths[i] = 0.0;
continue;
}
for(metric = afm->Metrics; metric; metric = metric->next) {
if(!strcmp(metric->N, PSDRV_ANSIVector[i])) {
afm->CharWidths[i] = metric->WX;
break;
}
}
if(!metric) {
WARN("Couldn't find glyph '%s' in font '%s'\n",
PSDRV_ANSIVector[i], afm->FontName);
afm->CharWidths[i] = 0.0;
}
}
return;
}
/***********************************************************
*
* PSDRV_DumpFontList
*
*/
static void PSDRV_DumpFontList(void)
{
FONTFAMILY *family;
AFMLISTENTRY *afmle;
for(family = PSDRV_AFMFontList; family; family = family->next) {
TRACE("Family '%s'\n", family->FamilyName);
for(afmle = family->afmlist; afmle; afmle = afmle->next) {
TRACE("\tFontName '%s'\n", afmle->afm->FontName);
}
}
return;
}
/***********************************************************
*
* PSDRV_GetFontMetrics
*
* Only exported function in this file. Parses all afm files listed in
* [afmfiles] of wine.conf .
*/
BOOL PSDRV_GetFontMetrics(void)
{
int idx = 0;
char key[256];
char value[256];
while (PROFILE_EnumWineIniString( "afmfiles", idx++, key, sizeof(key), value, sizeof(value)))
{
AFM *afm = PSDRV_AFMParse(value);
if (afm)
{
if(afm->EncodingScheme &&
!strcmp(afm->EncodingScheme, "AdobeStandardEncoding")) {
PSDRV_ReencodeCharWidths(afm);
}
PSDRV_AddAFMtoList(&PSDRV_AFMFontList, afm);
}
}
PSDRV_DumpFontList();
return TRUE;
}
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