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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkFontMgr_custom.h"
#include "SkFontMgr_directory.h"
#include "SkOSFile.h"
#include "SkOSPath.h"
#include "SkStream.h"
class DirectorySystemFontLoader : public SkFontMgr_Custom::SystemFontLoader {
public:
DirectorySystemFontLoader(const char* dir) : fBaseDirectory(dir) { }
void loadSystemFonts(const SkTypeface_FreeType::Scanner& scanner,
SkFontMgr_Custom::Families* families) const override
{
load_directory_fonts(scanner, fBaseDirectory, ".ttf", families);
load_directory_fonts(scanner, fBaseDirectory, ".ttc", families);
load_directory_fonts(scanner, fBaseDirectory, ".otf", families);
load_directory_fonts(scanner, fBaseDirectory, ".pfb", families);
if (families->empty()) {
SkFontStyleSet_Custom* family = new SkFontStyleSet_Custom(SkString());
families->push_back().reset(family);
family->appendTypeface(sk_make_sp<SkTypeface_Empty>());
}
}
private:
static SkFontStyleSet_Custom* find_family(SkFontMgr_Custom::Families& families,
const char familyName[])
{
for (int i = 0; i < families.count(); ++i) {
if (families[i]->getFamilyName().equals(familyName)) {
return families[i].get();
}
}
return nullptr;
}
static void load_directory_fonts(const SkTypeface_FreeType::Scanner& scanner,
const SkString& directory, const char* suffix,
SkFontMgr_Custom::Families* families)
{
SkOSFile::Iter iter(directory.c_str(), suffix);
SkString name;
while (iter.next(&name, false)) {
SkString filename(SkOSPath::Join(directory.c_str(), name.c_str()));
std::unique_ptr<SkStreamAsset> stream = SkStream::MakeFromFile(filename.c_str());
if (!stream) {
SkDebugf("---- failed to open <%s>\n", filename.c_str());
continue;
}
int numFaces;
if (!scanner.recognizedFont(stream.get(), &numFaces)) {
SkDebugf("---- failed to open <%s> as a font\n", filename.c_str());
continue;
}
for (int faceIndex = 0; faceIndex < numFaces; ++faceIndex) {
bool isFixedPitch;
SkString realname;
SkFontStyle style = SkFontStyle(); // avoid uninitialized warning
if (!scanner.scanFont(stream.get(), faceIndex,
&realname, &style, &isFixedPitch, nullptr))
{
SkDebugf("---- failed to open <%s> <%d> as a font\n",
filename.c_str(), faceIndex);
continue;
}
SkFontStyleSet_Custom* addTo = find_family(*families, realname.c_str());
if (nullptr == addTo) {
addTo = new SkFontStyleSet_Custom(realname);
families->push_back().reset(addTo);
}
addTo->appendTypeface(sk_make_sp<SkTypeface_File>(style, isFixedPitch, true,
realname, filename.c_str(),
faceIndex));
}
}
SkOSFile::Iter dirIter(directory.c_str());
while (dirIter.next(&name, true)) {
if (name.startsWith(".")) {
continue;
}
SkString dirname(SkOSPath::Join(directory.c_str(), name.c_str()));
load_directory_fonts(scanner, dirname, suffix, families);
}
}
SkString fBaseDirectory;
};
SK_API sk_sp<SkFontMgr> SkFontMgr_New_Custom_Directory(const char* dir) {
return sk_make_sp<SkFontMgr_Custom>(DirectorySystemFontLoader(dir));
}
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