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// SPDX-License-Identifier: MIT OR MPL-2.0 OR LGPL-2.1-or-later OR GPL-2.0-or-later
// Copyright 2010, SIL International, All rights reserved.
#include "graphite2/Font.h"
#include "inc/Face.h"
#include "inc/FileFace.h"
#include "inc/GlyphCache.h"
#include "inc/CmapCache.h"
#include "inc/Silf.h"
#include "inc/json.h"
using namespace graphite2;
#if !defined GRAPHITE2_NTRACING
extern json *global_log;
#endif
namespace
{
bool load_face(Face & face, unsigned int options)
{
#ifdef GRAPHITE2_TELEMETRY
telemetry::category _misc_cat(face.tele.misc);
#endif
Face::Table silf(face, Tag::Silf, 0x00050000);
if (!silf)
return false;
if (!face.readGlyphs(options))
return false;
if (silf)
{
if (!face.readFeatures() || !face.readGraphite(silf))
{
#if !defined GRAPHITE2_NTRACING
if (global_log)
{
*global_log << json::object
<< "type" << "fontload"
<< "failure" << face.error()
<< "context" << face.error_context()
<< json::close;
}
#endif
return false;
}
else
return true;
}
else
return false;
}
inline
uint32 zeropad(const uint32 x)
{
if (x == 0x20202020) return 0;
if ((x & 0x00FFFFFF) == 0x00202020) return x & 0xFF000000;
if ((x & 0x0000FFFF) == 0x00002020) return x & 0xFFFF0000;
if ((x & 0x000000FF) == 0x00000020) return x & 0xFFFFFF00;
return x;
}
}
extern "C" {
gr_face* gr_make_face_with_ops(const void* appFaceHandle/*non-NULL*/, const gr_face_ops *ops, unsigned int faceOptions)
//the appFaceHandle must stay alive all the time when the gr_face is alive. When finished with the gr_face, call destroy_face
{
if (ops == 0) return 0;
Face *res = new Face(appFaceHandle, *ops);
if (res && load_face(*res, faceOptions))
return static_cast<gr_face *>(res);
delete res;
return 0;
}
gr_face* gr_make_face(const void* appFaceHandle/*non-NULL*/, gr_get_table_fn tablefn, unsigned int faceOptions)
{
const gr_face_ops ops = {sizeof(gr_face_ops), tablefn, NULL};
return gr_make_face_with_ops(appFaceHandle, &ops, faceOptions);
}
gr_face* gr_make_face_with_seg_cache_and_ops(const void* appFaceHandle/*non-NULL*/, const gr_face_ops *ops, unsigned int , unsigned int faceOptions)
{
return gr_make_face_with_ops(appFaceHandle, ops, faceOptions);
}
gr_face* gr_make_face_with_seg_cache(const void* appFaceHandle/*non-NULL*/, gr_get_table_fn tablefn, unsigned int, unsigned int faceOptions)
{
const gr_face_ops ops = {sizeof(gr_face_ops), tablefn, NULL};
return gr_make_face_with_ops(appFaceHandle, &ops, faceOptions);
}
gr_uint32 gr_str_to_tag(const char *str)
{
uint32 res = 0;
switch(max(strlen(str),size_t(4)))
{
case 4: res |= str[3]; GR_FALLTHROUGH;
case 3: res |= str[2] << 8; GR_FALLTHROUGH;
case 2: res |= str[1] << 16; GR_FALLTHROUGH;
case 1: res |= str[0] << 24; GR_FALLTHROUGH;
default: break;
}
return res;
}
void gr_tag_to_str(gr_uint32 tag, char *str)
{
if (!str) return;
*str++ = char(tag >> 24);
*str++ = char(tag >> 16);
*str++ = char(tag >> 8);
*str++ = char(tag);
*str = '\0';
}
gr_feature_val* gr_face_featureval_for_lang(const gr_face* pFace, gr_uint32 langname/*0 means clone default*/) //clones the features. if none for language, clones the default
{
assert(pFace);
langname = zeropad(langname);
return static_cast<gr_feature_val *>(pFace->theSill().cloneFeatures(langname));
}
const gr_feature_ref* gr_face_find_fref(const gr_face* pFace, gr_uint32 featId) //When finished with the FeatureRef, call destroy_FeatureRef
{
assert(pFace);
featId = zeropad(featId);
const FeatureRef* pRef = pFace->featureById(featId);
return static_cast<const gr_feature_ref*>(pRef);
}
unsigned short gr_face_n_fref(const gr_face* pFace)
{
assert(pFace);
int res = 0;
for (int i = 0; i < pFace->numFeatures(); ++i)
if (!(pFace->feature(i)->getFlags() & FeatureRef::HIDDEN))
++res;
return res;
}
const gr_feature_ref* gr_face_fref(const gr_face* pFace, gr_uint16 i) //When finished with the FeatureRef, call destroy_FeatureRef
{
assert(pFace);
int count = 0;
for (int j = 0; j < pFace->numFeatures(); ++j)
{
const FeatureRef* pRef = pFace->feature(j);
if (!(pRef->getFlags() & FeatureRef::HIDDEN))
if (count++ == i)
return static_cast<const gr_feature_ref*>(pRef);
}
return 0;
}
unsigned short gr_face_n_languages(const gr_face* pFace)
{
assert(pFace);
return pFace->theSill().numLanguages();
}
gr_uint32 gr_face_lang_by_index(const gr_face* pFace, gr_uint16 i)
{
assert(pFace);
return pFace->theSill().getLangName(i);
}
void gr_face_destroy(gr_face *face)
{
delete static_cast<Face*>(face);
}
gr_uint16 gr_face_name_lang_for_locale(gr_face *face, const char * locale)
{
if (face)
{
return face->languageForLocale(locale);
}
return 0;
}
unsigned short gr_face_n_glyphs(const gr_face* pFace)
{
return pFace->glyphs().numGlyphs();
}
const gr_faceinfo *gr_face_info(const gr_face *pFace, gr_uint32 script)
{
if (!pFace) return 0;
const Silf *silf = pFace->chooseSilf(script);
if (silf) return silf->silfInfo();
return 0;
}
int gr_face_is_char_supported(const gr_face* pFace, gr_uint32 usv, gr_uint32 script)
{
const Cmap & cmap = pFace->cmap();
gr_uint16 gid = cmap[usv];
if (!gid)
{
const Silf * silf = pFace->chooseSilf(script);
gid = silf->findPseudo(usv);
}
return (gid != 0);
}
#ifndef GRAPHITE2_NFILEFACE
gr_face* gr_make_file_face(const char *filename, unsigned int faceOptions)
{
FileFace* pFileFace = new FileFace(filename);
if (*pFileFace)
{
gr_face* pRes = gr_make_face_with_ops(pFileFace, &FileFace::ops, faceOptions);
if (pRes)
{
pRes->takeFileFace(pFileFace); //takes ownership
return pRes;
}
}
//error when loading
delete pFileFace;
return NULL;
}
gr_face* gr_make_file_face_with_seg_cache(const char* filename, unsigned int, unsigned int faceOptions) //returns NULL on failure. //TBD better error handling
//when finished with, call destroy_face
{
return gr_make_file_face(filename, faceOptions);
}
#endif //!GRAPHITE2_NFILEFACE
} // extern "C"
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