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/*
* Copyright 2008 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkFontConfigInterface.h"
#include "SkFontConfigTypeface.h"
#include "SkFontDescriptor.h"
#include "SkStream.h"
#include "SkTypeface.h"
#include "SkTypefaceCache.h"
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
SK_DECLARE_STATIC_MUTEX(gFontConfigInterfaceMutex);
static SkFontConfigInterface* gFontConfigInterface;
SkFontConfigInterface* SkFontConfigInterface::RefGlobal() {
SkAutoMutexAcquire ac(gFontConfigInterfaceMutex);
return SkSafeRef(gFontConfigInterface);
}
SkFontConfigInterface* SkFontConfigInterface::SetGlobal(SkFontConfigInterface* fc) {
SkAutoMutexAcquire ac(gFontConfigInterfaceMutex);
SkRefCnt_SafeAssign(gFontConfigInterface, fc);
return fc;
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// convenience function to create the direct interface if none is installed.
extern SkFontConfigInterface* SkCreateDirectFontConfigInterface();
static SkFontConfigInterface* RefFCI() {
for (;;) {
SkFontConfigInterface* fci = SkFontConfigInterface::RefGlobal();
if (fci) {
return fci;
}
fci = SkFontConfigInterface::GetSingletonDirectInterface(&gFontConfigInterfaceMutex);
SkFontConfigInterface::SetGlobal(fci);
}
}
// export this to SkFontMgr_fontconfig.cpp until this file just goes away.
SkFontConfigInterface* SkFontHost_fontconfig_ref_global();
SkFontConfigInterface* SkFontHost_fontconfig_ref_global() {
return RefFCI();
}
///////////////////////////////////////////////////////////////////////////////
struct NameStyle {
NameStyle(const char* name, const SkFontStyle& style)
: fFamilyName(name) // don't need to make a deep copy
, fStyle(style) {}
const char* fFamilyName;
SkFontStyle fStyle;
};
static bool find_by_NameStyle(SkTypeface* cachedTypeface,
const SkFontStyle& cachedStyle,
void* ctx)
{
FontConfigTypeface* cachedFCTypeface = static_cast<FontConfigTypeface*>(cachedTypeface);
const NameStyle* nameStyle = static_cast<const NameStyle*>(ctx);
return nameStyle->fStyle == cachedStyle &&
cachedFCTypeface->isFamilyName(nameStyle->fFamilyName);
}
static bool find_by_FontIdentity(SkTypeface* cachedTypeface, const SkFontStyle&, void* ctx) {
typedef SkFontConfigInterface::FontIdentity FontIdentity;
FontConfigTypeface* cachedFCTypeface = static_cast<FontConfigTypeface*>(cachedTypeface);
FontIdentity* indentity = static_cast<FontIdentity*>(ctx);
return cachedFCTypeface->getIdentity() == *indentity;
}
SkTypeface* FontConfigTypeface::LegacyCreateTypeface(const char familyName[],
SkTypeface::Style style)
{
SkAutoTUnref<SkFontConfigInterface> fci(RefFCI());
if (nullptr == fci.get()) {
return nullptr;
}
// Check if requested NameStyle is in the NameStyle cache.
SkFontStyle requestedStyle(style);
NameStyle nameStyle(familyName, requestedStyle);
SkTypeface* face = SkTypefaceCache::FindByProcAndRef(find_by_NameStyle, &nameStyle);
if (face) {
//SkDebugf("found cached face <%s> <%s> %p [%d]\n",
// familyName, ((FontConfigTypeface*)face)->getFamilyName(),
// face, face->getRefCnt());
return face;
}
SkFontConfigInterface::FontIdentity indentity;
SkString outFamilyName;
SkTypeface::Style outStyle;
if (!fci->matchFamilyName(familyName, style, &indentity, &outFamilyName, &outStyle)) {
return nullptr;
}
// Check if a typeface with this FontIdentity is already in the FontIdentity cache.
face = SkTypefaceCache::FindByProcAndRef(find_by_FontIdentity, &indentity);
if (!face) {
face = FontConfigTypeface::Create(SkFontStyle(outStyle), indentity, outFamilyName);
// Add this FontIdentity to the FontIdentity cache.
SkTypefaceCache::Add(face, requestedStyle);
}
// TODO: Ensure requested NameStyle and resolved NameStyle are both in the NameStyle cache.
//SkDebugf("add face <%s> <%s> %p [%d]\n",
// familyName, outFamilyName.c_str(),
// face, face->getRefCnt());
return face;
}
///////////////////////////////////////////////////////////////////////////////
SkStreamAsset* FontConfigTypeface::onOpenStream(int* ttcIndex) const {
SkStreamAsset* stream = this->getLocalStream();
if (stream) {
// TODO: should have been provided by CreateFromStream()
*ttcIndex = 0;
return stream->duplicate();
}
SkAutoTUnref<SkFontConfigInterface> fci(RefFCI());
if (nullptr == fci.get()) {
return nullptr;
}
*ttcIndex = this->getIdentity().fTTCIndex;
return fci->openStream(this->getIdentity());
}
void FontConfigTypeface::onGetFamilyName(SkString* familyName) const {
*familyName = fFamilyName;
}
void FontConfigTypeface::onGetFontDescriptor(SkFontDescriptor* desc,
bool* isLocalStream) const {
SkString name;
this->getFamilyName(&name);
desc->setFamilyName(name.c_str());
*isLocalStream = SkToBool(this->getLocalStream());
}
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