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/*
* Copyright 2012 Chris Young <chris@unsatisfactorysoftware.co.uk>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Font glyph scanner for Unicode substitutions.
*/
#include <stdio.h>
#include <string.h>
#include <proto/diskfont.h>
#include <proto/dos.h>
#include <proto/exec.h>
#include <diskfont/diskfonttag.h>
#include <diskfont/oterrors.h>
#include <libwapcaplet/libwapcaplet.h>
/**
* Scan a font for glyphs not present in glypharray.
*
* \param fontname font to scan
* \param glypharray an array of 0xffff lwc_string pointers
* \return number of new glyphs found
*/
ULONG ami_font_scan_font(const char *fontname, lwc_string **glypharray)
{
struct OutlineFont *ofont;
struct MinList *widthlist;
struct GlyphWidthEntry *gwnode;
ULONG foundglyphs = 0;
ULONG serif = 0;
ofont = OpenOutlineFont(fontname, NULL, OFF_OPEN);
if(!ofont) return;
if(ESetInfo(&ofont->olf_EEngine,
OT_PointHeight, 10 * (1 << 16),
OT_GlyphCode, 0x0000,
OT_GlyphCode2, 0xffff,
TAG_END) == OTERR_Success)
{
if(EObtainInfo(&ofont->olf_EEngine,
OT_WidthList, &widthlist, TAG_END) == 0)
{
gwnode = (struct GlyphWidthEntry *)GetHead((struct List *)widthlist);
do {
if(gwnode && (glypharray[gwnode->gwe_Code] == NULL)) {
lwc_intern_string(fontname, strlen(fontname) - 5, &glypharray[gwnode->gwe_Code]);
//printf("%lx\n",gwnode->gwe_Code);
foundglyphs++;
}
} while(gwnode = (struct GlyphWidthEntry *)GetSucc((struct Node *)gwnode));
}
}
CloseOutlineFont(ofont, NULL);
return foundglyphs;
}
/**
* Scan all fonts for glyphs.
*
* \param glypharray an array of 0xffff lwc_string pointers
* \return number of glyphs found
*/
ULONG ami_font_scan_fonts(lwc_string **glypharray)
{
/* TODO: this function should take a list of fonts and add to it, ignoring duplicates */
int afShortage, afSize = 100, i;
struct AvailFontsHeader *afh;
struct AvailFonts *af;
ULONG found, total = 0;
printf("Scanning fonts...\n");
do {
if(afh = (struct AvailFontsHeader *)AllocVec(afSize, MEMF_PRIVATE)) {
if(afShortage = AvailFonts(afh, afSize, AFF_DISK | AFF_OTAG | AFF_SCALED)) {
FreeVec(afh);
afSize += afShortage;
}
} else {
/* out of memory, bail out */
return 0;
}
} while (afShortage);
if(afh) {
af = (struct AvailFonts *)&(afh[1]);
printf("af = %lx entries = %ld\n", af, afh->afh_NumEntries);
/* bug somewhere, this only does 36 fonts as size 0 */
for(i = 0; i < afh->afh_NumEntries; i++) {
if((af[i].af_Attr.ta_YSize == 0) && (af[i].af_Attr.ta_Style == FS_NORMAL)) {
printf("%s (%ld) %ld\n", af[i].af_Attr.ta_Name, af[i].af_Attr.ta_Style, af[i].af_Attr.ta_YSize);
found = ami_font_scan_font(af[i].af_Attr.ta_Name, glypharray);
total += found;
printf("Found %ld new glyphs (total = %ld)\n", found, total);
}
af++;
}
FreeVec(afh);
} else {
return 0;
}
}
/**
* Load a font glyph cache
*
* \param filename name of cache file to load
* \param glypharray an array of 0xffff lwc_string pointers
* \return number of glyphs loaded
*/
ULONG ami_font_scan_load(const char *filename, lwc_string **glypharray)
{
ULONG found = 0;
BPTR fh = 0;
if(fh = FOpen(filename, MODE_OLDFILE, 0)) {
printf("Reading %s\n", filename);
/* TODO: read lines using ReadArgs() */
FClose(fh);
}
return found;
}
/**
* Save a font glyph cache
*
* \param filename name of cache file to save
* \param glypharray an array of 0xffff lwc_string pointers
*/
void ami_font_scan_save(const char *filename, lwc_string **glypharray)
{
ULONG i;
BPTR fh = 0;
if(fh = FOpen(filename, MODE_NEWFILE, 0)) {
printf("Writing %s\n", filename);
FPrintf(fh, "; This file is auto-generated. To recreate the cache, delete this file.\n");
FPrintf(fh, "; This file is parsed using ReadArgs() with the following template:\n");
FPrintf(fh, "; CODE/A,FONT/A\n;\n");
for(i=0x0000; i<=0xffff; i++)
{
if(glypharray[i]) {
FPrintf(fh, "%04lx \"%s\"\n", i, lwc_string_data(glypharray[i]));
lwc_string_unref(glypharray[i]);
}
}
FClose(fh);
}
}
/**
* Finalise the font glyph cache.
*
* \param glypharray an array of 0xffff lwc_string pointers to free
*/
void ami_font_scan_fini(lwc_string **glypharray)
{
ULONG i;
for(i=0x0000; i<=0xffff; i++)
{
if(glypharray[i]) {
lwc_string_unref(glypharray[i]);
glypharray[i] = NULL;
}
}
}
/**
* Initialise the font glyph cache.
* Reads an existing file or, if not present, generates a new cache.
*
* \param filename cache file to attempt to read
* \param glypharray an array of 0xffff lwc_string pointers
*/
void ami_font_scan_init(const char *filename, lwc_string **glypharray)
{
ULONG i, found;
/* Ensure array zeroed */
for(i=0x0000; i<=0xffff; i++)
glypharray[i] = NULL;
found = ami_font_scan_load(filename, glypharray);
if(found == 0) {
found = ami_font_scan_fonts(glypharray);
ami_font_scan_save(filename, glypharray);
}
printf("Initialised with %ld glyphs\n", found);
}
#ifdef AMI_FONT_SCAN_STANDALONE
/* This can be compiled as standalone using:
* gcc -o font_scan font_scan.c -lwapcaplet -lauto -D__USE_INLINE__ -DAMI_FONT_SCAN_STANDALONE
*/
int main(int argc, char** argv)
{
lwc_string *glypharray[0xffff + 1];
ULONG found = 0;
BPTR fh;
if(argc < 2) return 5;
printf("%s\n",argv[1]);
ami_font_scan_init(argv[1], glypharray);
ami_font_scan_fini(glypharray);
return 0;
}
#endif
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