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299 lines
7.6 KiB
C
299 lines
7.6 KiB
C
/*
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* Font metric functions common to Type 1 (AFM) and TrueType font files.
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* Functions specific to Type 1 and TrueType fonts are in type1afm.c and
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* truetype.c respectively.
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*
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* Copyright 1998 Huw D M Davies
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* Copyright 2001 Ian Pilcher
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <string.h>
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#include "psdrv.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(psdrv);
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/* ptr to fonts for which we have afm files */
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DECLSPEC_HIDDEN FONTFAMILY *PSDRV_AFMFontList = NULL;
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/***********************************************************
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*
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* PSDRV_FreeAFMList
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*
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* Frees the family and afmlistentry structures in list head
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*/
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void PSDRV_FreeAFMList( FONTFAMILY *head )
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{
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AFMLISTENTRY *afmle, *nexta;
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FONTFAMILY *family, *nextf;
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for(nextf = family = head; nextf; family = nextf) {
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for(nexta = afmle = family->afmlist; nexta; afmle = nexta) {
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nexta = afmle->next;
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HeapFree( PSDRV_Heap, 0, afmle );
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}
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nextf = family->next;
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HeapFree( PSDRV_Heap, 0, family );
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}
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return;
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}
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/***********************************************************
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*
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* PSDRV_FindAFMinList
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* Returns ptr to an AFM if name (which is a PS font name) exists in list
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* headed by head.
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*/
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const AFM *PSDRV_FindAFMinList(FONTFAMILY *head, LPCSTR name)
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{
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FONTFAMILY *family;
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AFMLISTENTRY *afmle;
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for(family = head; family; family = family->next) {
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for(afmle = family->afmlist; afmle; afmle = afmle->next) {
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if(!strcmp(afmle->afm->FontName, name))
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return afmle->afm;
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}
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}
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return NULL;
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}
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/***********************************************************
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*
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* PSDRV_AddAFMtoList
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*
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* Adds an afm to the list whose head is pointed to by head. Creates new
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* family node if necessary and always creates a new AFMLISTENTRY.
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*
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* Returns FALSE for memory allocation error; returns TRUE, but sets *p_added
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* to FALSE, for duplicate.
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*/
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BOOL PSDRV_AddAFMtoList(FONTFAMILY **head, const AFM *afm, BOOL *p_added)
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{
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FONTFAMILY *family = *head;
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FONTFAMILY **insert = head;
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AFMLISTENTRY *tmpafmle, *newafmle;
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newafmle = HeapAlloc(PSDRV_Heap, HEAP_ZERO_MEMORY,
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sizeof(*newafmle));
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if (newafmle == NULL)
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return FALSE;
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newafmle->afm = afm;
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while(family) {
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if(!strcmp(family->FamilyName, afm->FamilyName))
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break;
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insert = &(family->next);
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family = family->next;
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}
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if(!family) {
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family = HeapAlloc(PSDRV_Heap, HEAP_ZERO_MEMORY,
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sizeof(*family));
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if (family == NULL) {
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HeapFree(PSDRV_Heap, 0, newafmle);
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return FALSE;
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}
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*insert = family;
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if (!(family->FamilyName = HeapAlloc(PSDRV_Heap, 0, strlen(afm->FamilyName)+1 ))) {
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HeapFree(PSDRV_Heap, 0, family);
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HeapFree(PSDRV_Heap, 0, newafmle);
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return FALSE;
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}
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strcpy( family->FamilyName, afm->FamilyName );
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family->afmlist = newafmle;
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*p_added = TRUE;
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return TRUE;
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}
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else {
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tmpafmle = family->afmlist;
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while (tmpafmle) {
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if (!strcmp(tmpafmle->afm->FontName, afm->FontName)) {
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WARN("Ignoring duplicate FontName '%s'\n", afm->FontName);
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HeapFree(PSDRV_Heap, 0, newafmle);
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*p_added = FALSE;
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return TRUE; /* not a fatal error */
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}
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tmpafmle = tmpafmle->next;
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}
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}
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tmpafmle = family->afmlist;
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while(tmpafmle->next)
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tmpafmle = tmpafmle->next;
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tmpafmle->next = newafmle;
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*p_added = TRUE;
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return TRUE;
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}
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/***********************************************************
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*
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* PSDRV_DumpFontList
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*
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*/
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static void PSDRV_DumpFontList(void)
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{
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FONTFAMILY *family;
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AFMLISTENTRY *afmle;
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for(family = PSDRV_AFMFontList; family; family = family->next) {
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TRACE("Family '%s'\n", family->FamilyName);
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for(afmle = family->afmlist; afmle; afmle = afmle->next)
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{
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#if 0
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INT i;
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#endif
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TRACE("\tFontName '%s' (%i glyphs) - '%s' encoding:\n",
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afmle->afm->FontName, afmle->afm->NumofMetrics,
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afmle->afm->EncodingScheme);
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/* Uncomment to regenerate font data; see afm2c.c */
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/* PSDRV_AFM2C(afmle->afm); */
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#if 0
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for (i = 0; i < afmle->afm->NumofMetrics; ++i)
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{
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TRACE("\t\tU+%.4lX; C %i; N '%s'\n", afmle->afm->Metrics[i].UV,
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afmle->afm->Metrics[i].C, afmle->afm->Metrics[i].N->sz);
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}
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#endif
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}
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}
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return;
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}
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/*******************************************************************************
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* PSDRV_CalcAvgCharWidth
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*
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* Calculate WinMetrics.sAvgCharWidth for a Type 1 font. Can also be used on
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* TrueType fonts, if font designer set OS/2:xAvgCharWidth to zero.
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*
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* Tries to use formula in TrueType specification; falls back to simple mean
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* if any lowercase latin letter (or space) is not present.
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*/
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static inline SHORT MeanCharWidth(const AFM *afm)
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{
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float w = 0.0;
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int i;
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for (i = 0; i < afm->NumofMetrics; ++i)
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w += afm->Metrics[i].WX;
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w /= afm->NumofMetrics;
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return (SHORT)(w + 0.5);
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}
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static const struct { LONG UV; int weight; } UVweight[27] =
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{
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{ 0x0061, 64 }, { 0x0062, 14 }, { 0x0063, 27 }, { 0x0064, 35 },
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{ 0x0065, 100 }, { 0x0066, 20 }, { 0x0067, 14 }, { 0x0068, 42 },
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{ 0x0069, 63 }, { 0x006a, 3 }, { 0x006b, 6 }, { 0x006c, 35 },
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{ 0x006d, 20 }, { 0x006e, 56 }, { 0x006f, 56 }, { 0x0070, 17 },
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{ 0x0071, 4 }, { 0x0072, 49 }, { 0x0073, 56 }, { 0x0074, 71 },
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{ 0x0075, 31 }, { 0x0076, 10 }, { 0x0077, 18 }, { 0x0078, 3 },
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{ 0x0079, 18 }, { 0x007a, 2 }, { 0x0020, 166 }
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};
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SHORT PSDRV_CalcAvgCharWidth(const AFM *afm)
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{
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float w = 0.0;
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int i;
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for (i = 0; i < 27; ++i)
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{
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const AFMMETRICS *afmm;
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afmm = PSDRV_UVMetrics(UVweight[i].UV, afm);
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if (afmm->UV != UVweight[i].UV) /* UVMetrics returns first glyph */
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return MeanCharWidth(afm); /* in font if UV is missing */
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w += afmm->WX * (float)(UVweight[i].weight);
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}
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w /= 1000.0;
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return (SHORT)(w + 0.5);
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}
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/*******************************************************************************
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* AddBuiltinAFMs
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*
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*/
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static BOOL AddBuiltinAFMs(void)
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{
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const AFM *const *afm = PSDRV_BuiltinAFMs;
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while (*afm != NULL)
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{
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BOOL added;
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if (PSDRV_AddAFMtoList(&PSDRV_AFMFontList, *afm, &added) == FALSE)
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return FALSE;
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if (added == FALSE)
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TRACE("Ignoring built-in font %s\n", (*afm)->FontName);
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++afm;
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}
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return TRUE;
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}
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/***********************************************************
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*
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* PSDRV_GetFontMetrics
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*
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* Parses all afm files listed in the
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* HKEY_CURRENT_USER\\Software\\Wine\\Fonts registry key.
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* Adds built-in data last, so it can be overridden by
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* user-supplied AFM or TTF files.
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*
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* If this function fails, PSDRV_Init will destroy PSDRV_Heap, so don't worry
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* about freeing all the memory that's been allocated.
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*/
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BOOL PSDRV_GetFontMetrics(void)
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{
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if (PSDRV_GlyphListInit() != 0)
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return FALSE;
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if (PSDRV_GetType1Metrics() == FALSE)
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return FALSE;
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if (AddBuiltinAFMs() == FALSE)
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return FALSE;
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PSDRV_IndexGlyphList(); /* Enable fast searching of glyph names */
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PSDRV_DumpFontList();
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return TRUE;
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}
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