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font.c
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C/C++ Source or Header
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1992-12-12
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9KB
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472 lines
/*
* font.c
*
* map dvi fonts to X fonts
*/
#include <X11/Xos.h>
#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#include <stdio.h>
#include <ctype.h>
#include "DviP.h"
#include "XFontName.h"
static DisposeFontSizes();
static char *
savestr (s)
char *s;
{
char *n;
if (!s)
return 0;
n = XtMalloc (strlen (s) + 1);
if (n)
strcpy (n, s);
return n;
}
static DviFontList *
LookupFontByPosition (dw, position)
DviWidget dw;
int position;
{
DviFontList *f;
for (f = dw->dvi.fonts; f; f = f->next)
if (f->dvi_number == position)
break;
return f;
}
int
MaxFontPosition (dw)
DviWidget dw;
{
DviFontList *f;
int n = -1;
for (f = dw->dvi.fonts; f; f = f->next)
if (f->dvi_number > n)
n = f->dvi_number;
return n;
}
static DviFontSizeList *
LookupFontSizeBySize (dw, f, size)
DviWidget dw;
DviFontList *f;
int size;
{
DviFontSizeList *fs, *best = 0, *smallest = 0;
int bestsize = 0;
XFontName fontName;
unsigned int fontNameAttributes;
char fontNameString[2048];
int decipointsize;
if (f->scalable) {
decipointsize = (10*size)/dw->dvi.sizescale;
for (best = f->sizes; best; best = best->next)
if (best->size == decipointsize)
return best;
best = (DviFontSizeList *) XtMalloc(sizeof *best);
best->next = f->sizes;
best->size = decipointsize;
f->sizes = best;
XParseFontName (f->x_name, &fontName, &fontNameAttributes);
fontNameAttributes &= ~(FontNamePixelSize|FontNameAverageWidth);
fontNameAttributes |= FontNameResolutionX;
fontNameAttributes |= FontNameResolutionY;
fontNameAttributes |= FontNamePointSize;
fontName.ResolutionX = dw->dvi.display_resolution;
fontName.ResolutionY = dw->dvi.display_resolution;
fontName.PointSize = decipointsize;
XFormatFontName (&fontName, fontNameAttributes, fontNameString);
best->x_name = savestr (fontNameString);
best->doesnt_exist = 0;
best->font = 0;
return best;
}
for (fs = f->sizes; fs; fs=fs->next) {
if (dw->dvi.sizescale*fs->size <= 10*size
&& fs->size >= bestsize) {
best = fs;
bestsize = fs->size;
}
if (smallest == 0 || fs->size < smallest->size)
smallest = fs;
}
return best ? best : smallest;
}
static char *
SkipFontNameElement (n)
char *n;
{
while (*n != '-')
if (!*++n)
return 0;
return n+1;
}
# define SizePosition 8
# define EncodingPosition 13
static
ConvertFontNameToSize (n)
char *n;
{
int i, size;
for (i = 0; i < SizePosition; i++) {
n = SkipFontNameElement (n);
if (!n)
return -1;
}
size = atoi (n);
return size;
}
static char *
ConvertFontNameToEncoding (n)
char *n;
{
int i;
for (i = 0; i < EncodingPosition; i++) {
n = SkipFontNameElement (n);
if (!n)
return 0;
}
return n;
}
DviFontSizeList *
InstallFontSizes (dw, x_name, scalablep)
DviWidget dw;
char *x_name;
Boolean *scalablep;
{
char fontNameString[2048];
char **fonts;
int i, count;
int size;
DviFontSizeList *sizes, *new;
XFontName fontName;
unsigned int fontNameAttributes;
*scalablep = FALSE;
if (!XParseFontName (x_name, &fontName, &fontNameAttributes))
return 0;
fontNameAttributes &= ~(FontNamePixelSize|FontNamePointSize
|FontNameAverageWidth);
fontNameAttributes |= FontNameResolutionX;
fontNameAttributes |= FontNameResolutionY;
fontName.ResolutionX = dw->dvi.display_resolution;
fontName.ResolutionY = dw->dvi.display_resolution;
XFormatFontName (&fontName, fontNameAttributes, fontNameString);
fonts = XListFonts (XtDisplay (dw), fontNameString, 10000000, &count);
sizes = 0;
for (i = 0; i < count; i++) {
size = ConvertFontNameToSize (fonts[i]);
if (size == 0) {
DisposeFontSizes (dw, sizes);
sizes = 0;
*scalablep = TRUE;
break;
}
if (size != -1) {
new = (DviFontSizeList *) XtMalloc (sizeof *new);
new->next = sizes;
new->size = size;
new->x_name = savestr (fonts[i]);
new->doesnt_exist = 0;
new->font = 0;
sizes = new;
}
}
XFreeFontNames (fonts);
return sizes;
}
static
DisposeFontSizes (dw, fs)
DviWidget dw;
DviFontSizeList *fs;
{
DviFontSizeList *next;
for (; fs; fs=next) {
next = fs->next;
if (fs->x_name)
XtFree (fs->x_name);
if (fs->font) {
XUnloadFont (XtDisplay (dw), fs->font->fid);
XFree ((char *)fs->font);
}
XtFree ((char *) fs);
}
}
static DviFontList *
InstallFont (dw, position, dvi_name, x_name)
DviWidget dw;
int position;
char *dvi_name;
char *x_name;
{
DviFontList *f;
char *encoding;
if ((f = LookupFontByPosition (dw, position)) != NULL) {
/*
* ignore gratuitous font loading
*/
if (!strcmp (f->dvi_name, dvi_name) &&
!strcmp (f->x_name, x_name))
return f;
DisposeFontSizes (dw, f->sizes);
if (f->dvi_name)
XtFree (f->dvi_name);
if (f->x_name)
XtFree (f->x_name);
f->device_font = 0;
} else {
f = (DviFontList *) XtMalloc (sizeof (*f));
f->next = dw->dvi.fonts;
dw->dvi.fonts = f;
}
f->initialized = FALSE;
f->dvi_name = savestr (dvi_name);
f->device_font = device_find_font (dw->dvi.device, dvi_name);
f->x_name = savestr (x_name);
f->dvi_number = position;
f->sizes = 0;
f->scalable = FALSE;
if (f->x_name) {
encoding = ConvertFontNameToEncoding (f->x_name);
f->char_map = DviFindMap (encoding);
} else
f->char_map = 0;
/*
* force requery of fonts
*/
dw->dvi.font = 0;
dw->dvi.font_number = -1;
dw->dvi.cache.font = 0;
dw->dvi.cache.font_number = -1;
dw->dvi.device_font = 0;
dw->dvi.device_font_number = -1;
return f;
}
ForgetFonts (dw)
DviWidget dw;
{
DviFontList *f = dw->dvi.fonts;
while (f) {
DviFontList *tem = f;
if (f->sizes)
DisposeFontSizes (dw, f->sizes);
if (f->dvi_name)
XtFree (f->dvi_name);
if (f->x_name)
XtFree (f->x_name);
f = f->next;
XtFree ((char *) tem);
}
/*
* force requery of fonts
*/
dw->dvi.font = 0;
dw->dvi.font_number = -1;
dw->dvi.cache.font = 0;
dw->dvi.cache.font_number = -1;
dw->dvi.device_font = 0;
dw->dvi.device_font_number = -1;
dw->dvi.fonts = 0;
}
static char *
MapDviNameToXName (dw, dvi_name)
DviWidget dw;
char *dvi_name;
{
DviFontMap *fm;
for (fm = dw->dvi.font_map; fm; fm=fm->next)
if (!strcmp (fm->dvi_name, dvi_name))
return fm->x_name;
return 0;
}
#if 0
static char *
MapXNameToDviName (dw, x_name)
DviWidget dw;
char *x_name;
{
DviFontMap *fm;
for (fm = dw->dvi.font_map; fm; fm=fm->next)
if (!strcmp (fm->x_name, x_name))
return fm->dvi_name;
return 0;
}
#endif
ParseFontMap (dw)
DviWidget dw;
{
char dvi_name[1024];
char x_name[2048];
char *m, *s;
DviFontMap *fm, *new;
if (dw->dvi.font_map)
DestroyFontMap (dw->dvi.font_map);
fm = 0;
m = dw->dvi.font_map_string;
while (*m) {
s = m;
while (*m && !isspace (*m))
++m;
strncpy (dvi_name, s, m-s);
dvi_name[m-s] = '\0';
while (isspace (*m))
++m;
s = m;
while (*m && *m != '\n')
++m;
strncpy (x_name, s, m-s);
x_name[m-s] = '\0';
new = (DviFontMap *) XtMalloc (sizeof *new);
new->x_name = savestr (x_name);
new->dvi_name = savestr (dvi_name);
new->next = fm;
fm = new;
++m;
}
dw->dvi.font_map = fm;
}
DestroyFontMap (font_map)
DviFontMap *font_map;
{
DviFontMap *next;
for (; font_map; font_map = next) {
next = font_map->next;
if (font_map->x_name)
XtFree (font_map->x_name);
if (font_map->dvi_name)
XtFree (font_map->dvi_name);
XtFree ((char *) font_map);
}
}
/* ARGSUSED */
SetFontPosition (dw, position, dvi_name, extra)
DviWidget dw;
int position;
char *dvi_name;
char *extra; /* unused */
{
char *x_name;
x_name = MapDviNameToXName (dw, dvi_name);
if (x_name)
(void) InstallFont (dw, position, dvi_name, x_name);
}
XFontStruct *
QueryFont (dw, position, size)
DviWidget dw;
int position;
int size;
{
DviFontList *f;
DviFontSizeList *fs;
f = LookupFontByPosition (dw, position);
if (!f)
return dw->dvi.default_font;
if (!f->initialized) {
f->sizes = InstallFontSizes (dw, f->x_name, &f->scalable);
f->initialized = TRUE;
}
fs = LookupFontSizeBySize (dw, f, size);
if (!fs)
return dw->dvi.default_font;
if (!fs->font) {
if (fs->x_name)
fs->font = XLoadQueryFont (XtDisplay (dw), fs->x_name);
if (!fs->font)
fs->font = dw->dvi.default_font;
}
return fs->font;
}
DeviceFont *
QueryDeviceFont (dw, position)
DviWidget dw;
int position;
{
DviFontList *f;
f = LookupFontByPosition (dw, position);
if (!f)
return 0;
return f->device_font;
}
DviCharNameMap *
QueryFontMap (dw, position)
DviWidget dw;
int position;
{
DviFontList *f;
f = LookupFontByPosition (dw, position);
if (f)
return f->char_map;
else
return 0;
}
#if 0
LoadFont (dw, position, size)
DviWidget dw;
int position;
int size;
{
XFontStruct *font;
font = QueryFont (dw, position, size);
dw->dvi.font_number = position;
dw->dvi.font_size = size;
dw->dvi.font = font;
XSetFont (XtDisplay (dw), dw->dvi.normal_GC, font->fid);
return;
}
#endif
/*
Local Variables:
c-indent-level: 8
c-continued-statement-offset: 8
c-brace-offset: -8
c-argdecl-indent: 8
c-label-offset: -8
c-tab-always-indent: nil
End:
*/