wine/dlls/wineps/afm.c
2005-06-20 14:18:03 +00:00

306 lines
7.8 KiB
C

/*
* Font metric functions common to Type 1 (AFM) and TrueType font files.
* Functions specific to Type 1 and TrueType fonts are in type1afm.c and
* truetype.c respectively.
*
* Copyright 1998 Huw D M Davies
* Copyright 2001 Ian Pilcher
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <string.h>
#include "psdrv.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(psdrv);
/* ptr to fonts for which we have afm files */
FONTFAMILY *PSDRV_AFMFontList = NULL;
/***********************************************************
*
* 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.
*/
const AFM *PSDRV_FindAFMinList(FONTFAMILY *head, LPCSTR 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.
*
* Returns FALSE for memory allocation error; returns TRUE, but sets *p_added
* to FALSE, for duplicate.
*/
BOOL PSDRV_AddAFMtoList(FONTFAMILY **head, const AFM *afm, BOOL *p_added)
{
FONTFAMILY *family = *head;
FONTFAMILY **insert = head;
AFMLISTENTRY *tmpafmle, *newafmle;
newafmle = HeapAlloc(PSDRV_Heap, HEAP_ZERO_MEMORY,
sizeof(*newafmle));
if (newafmle == NULL)
return FALSE;
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));
if (family == NULL) {
HeapFree(PSDRV_Heap, 0, newafmle);
return FALSE;
}
*insert = family;
if (!(family->FamilyName = HeapAlloc(PSDRV_Heap, 0, strlen(afm->FamilyName)+1 ))) {
HeapFree(PSDRV_Heap, 0, family);
HeapFree(PSDRV_Heap, 0, newafmle);
return FALSE;
}
strcpy( family->FamilyName, afm->FamilyName );
family->afmlist = newafmle;
*p_added = TRUE;
return TRUE;
}
else {
tmpafmle = family->afmlist;
while (tmpafmle) {
if (!strcmp(tmpafmle->afm->FontName, afm->FontName)) {
WARN("Ignoring duplicate FontName '%s'\n", afm->FontName);
HeapFree(PSDRV_Heap, 0, newafmle);
*p_added = FALSE;
return TRUE; /* not a fatal error */
}
tmpafmle = tmpafmle->next;
}
}
tmpafmle = family->afmlist;
while(tmpafmle->next)
tmpafmle = tmpafmle->next;
tmpafmle->next = newafmle;
*p_added = TRUE;
return TRUE;
}
/***********************************************************
*
* 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)
{
#if 0
INT i;
#endif
TRACE("\tFontName '%s' (%i glyphs) - '%s' encoding:\n",
afmle->afm->FontName, afmle->afm->NumofMetrics,
afmle->afm->EncodingScheme);
/* Uncomment to regenerate font data; see afm2c.c */
/* PSDRV_AFM2C(afmle->afm); */
#if 0
for (i = 0; i < afmle->afm->NumofMetrics; ++i)
{
TRACE("\t\tU+%.4lX; C %i; N '%s'\n", afmle->afm->Metrics[i].UV,
afmle->afm->Metrics[i].C, afmle->afm->Metrics[i].N->sz);
}
#endif
}
}
return;
}
/*******************************************************************************
* PSDRV_CalcAvgCharWidth
*
* Calculate WinMetrics.sAvgCharWidth for a Type 1 font. Can also be used on
* TrueType fonts, if font designer set OS/2:xAvgCharWidth to zero.
*
* Tries to use formula in TrueType specification; falls back to simple mean
* if any lowercase latin letter (or space) is not present.
*/
inline static SHORT MeanCharWidth(const AFM *afm)
{
float w = 0.0;
int i;
for (i = 0; i < afm->NumofMetrics; ++i)
w += afm->Metrics[i].WX;
w /= afm->NumofMetrics;
return (SHORT)(w + 0.5);
}
static const struct { LONG UV; int weight; } UVweight[27] =
{
{ 0x0061, 64 }, { 0x0062, 14 }, { 0x0063, 27 }, { 0x0064, 35 },
{ 0x0065, 100 }, { 0x0066, 20 }, { 0x0067, 14 }, { 0x0068, 42 },
{ 0x0069, 63 }, { 0x006a, 3 }, { 0x006b, 6 }, { 0x006c, 35 },
{ 0x006d, 20 }, { 0x006e, 56 }, { 0x006f, 56 }, { 0x0070, 17 },
{ 0x0071, 4 }, { 0x0072, 49 }, { 0x0073, 56 }, { 0x0074, 71 },
{ 0x0075, 31 }, { 0x0076, 10 }, { 0x0077, 18 }, { 0x0078, 3 },
{ 0x0079, 18 }, { 0x007a, 2 }, { 0x0020, 166 }
};
SHORT PSDRV_CalcAvgCharWidth(const AFM *afm)
{
float w = 0.0;
int i;
for (i = 0; i < 27; ++i)
{
const AFMMETRICS *afmm;
afmm = PSDRV_UVMetrics(UVweight[i].UV, afm);
if (afmm->UV != UVweight[i].UV) /* UVMetrics returns first glyph */
return MeanCharWidth(afm); /* in font if UV is missing */
w += afmm->WX * (float)(UVweight[i].weight);
}
w /= 1000.0;
return (SHORT)(w + 0.5);
}
/*******************************************************************************
* AddBuiltinAFMs
*
*/
static BOOL AddBuiltinAFMs(void)
{
const AFM *const *afm = PSDRV_BuiltinAFMs;
while (*afm != NULL)
{
BOOL added;
if (PSDRV_AddAFMtoList(&PSDRV_AFMFontList, *afm, &added) == FALSE)
return FALSE;
if (added == FALSE)
TRACE("Ignoring built-in font %s\n", (*afm)->FontName);
++afm;
}
return TRUE;
}
/***********************************************************
*
* PSDRV_GetFontMetrics
*
* Parses all afm files listed in [afmdirs] and [TrueType Font Directories]
* sections of Wine configuration file. Adds built-in data last, so it can
* be overridden by user-supplied AFM or TTF files.
*
* If this function fails, PSDRV_Init will destroy PSDRV_Heap, so don't worry
* about freeing all the memory that's been allocated.
*/
BOOL PSDRV_GetFontMetrics(void)
{
if (PSDRV_GlyphListInit() != 0)
return FALSE;
if (PSDRV_GetType1Metrics() == FALSE)
return FALSE;
#ifdef HAVE_FREETYPE
if (PSDRV_GetTrueTypeMetrics() == FALSE)
return FALSE;
#endif
if (AddBuiltinAFMs() == FALSE)
return FALSE;
PSDRV_IndexGlyphList(); /* Enable fast searching of glyph names */
PSDRV_DumpFontList();
return TRUE;
}