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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 "SkFontHost.h"
#include "SkFontHost_FreeType_common.h"
#include "SkFontStream.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 FindRec {
FindRec(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_proc(SkTypeface* cachedTypeface, const SkFontStyle& cachedStyle, void* ctx) {
FontConfigTypeface* cachedFCTypeface = (FontConfigTypeface*)cachedTypeface;
const FindRec* rec = static_cast<const FindRec*>(ctx);
return rec->fStyle == cachedStyle &&
cachedFCTypeface->isFamilyName(rec->fFamilyName);
}
SkTypeface* FontConfigTypeface::LegacyCreateTypeface(
const SkTypeface* familyFace,
const char familyName[],
SkTypeface::Style style) {
SkAutoTUnref<SkFontConfigInterface> fci(RefFCI());
if (NULL == fci.get()) {
return NULL;
}
if (familyFace) {
FontConfigTypeface* fct = (FontConfigTypeface*)familyFace;
familyName = fct->getFamilyName();
}
SkFontStyle requestedStyle(style);
FindRec rec(familyName, requestedStyle);
SkTypeface* face = SkTypefaceCache::FindByProcAndRef(find_proc, &rec);
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 NULL;
}
// check if we, in fact, already have this. perhaps fontconfig aliased the
// requested name to some other name we actually have...
rec.fFamilyName = outFamilyName.c_str();
rec.fStyle = SkFontStyle(outStyle);
face = SkTypefaceCache::FindByProcAndRef(find_proc, &rec);
if (face) {
return face;
}
face = FontConfigTypeface::Create(SkFontStyle(outStyle), indentity, outFamilyName);
SkTypefaceCache::Add(face, requestedStyle);
//SkDebugf("add face <%s> <%s> %p [%d]\n",
// familyName, outFamilyName.c_str(),
// face, face->getRefCnt());
return face;
}
///////////////////////////////////////////////////////////////////////////////
SkStream* FontConfigTypeface::onOpenStream(int* ttcIndex) const {
SkStream* stream = this->getLocalStream();
if (stream) {
// should have been provided by CreateFromStream()
*ttcIndex = 0;
SkAutoTUnref<SkStream> dupStream(stream->duplicate());
if (dupStream) {
return dupStream.detach();
}
// TODO: update interface use, remove the following code in this block.
size_t length = stream->getLength();
const void* memory = stream->getMemoryBase();
if (memory) {
return new SkMemoryStream(memory, length, true);
}
SkAutoTMalloc<uint8_t> allocMemory(length);
stream->rewind();
if (length == stream->read(allocMemory.get(), length)) {
SkAutoTUnref<SkMemoryStream> copyStream(new SkMemoryStream());
copyStream->setMemoryOwned(allocMemory.detach(), length);
return copyStream.detach();
}
stream->rewind();
stream->ref();
} else {
SkAutoTUnref<SkFontConfigInterface> fci(RefFCI());
if (NULL == fci.get()) {
return NULL;
}
stream = fci->openStream(this->getIdentity());
*ttcIndex = this->getIdentity().fTTCIndex;
}
return stream;
}
void FontConfigTypeface::onGetFamilyName(SkString* familyName) const {
*familyName = this->getFamilyName();
}
void FontConfigTypeface::onGetFontDescriptor(SkFontDescriptor* desc,
bool* isLocalStream) const {
desc->setFamilyName(this->getFamilyName());
desc->setFontIndex(this->getIdentity().fTTCIndex);
*isLocalStream = SkToBool(this->getLocalStream());
}
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