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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, SkTypeface::Style style)
: fFamilyName(name) // don't need to make a deep copy
, fStyle(style) {}
const char* fFamilyName;
SkTypeface::Style fStyle;
};
static bool find_proc(SkTypeface* face, SkTypeface::Style style, void* ctx) {
FontConfigTypeface* fci = (FontConfigTypeface*)face;
const FindRec* rec = (const FindRec*)ctx;
return rec->fStyle == style && fci->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();
}
FindRec rec(familyName, style);
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 = outStyle;
face = SkTypefaceCache::FindByProcAndRef(find_proc, &rec);
if (face) {
return face;
}
face = FontConfigTypeface::Create(outStyle, indentity, outFamilyName);
SkTypefaceCache::Add(face, style);
// SkDebugf("add face <%s> <%s> %p [%d]\n", familyName, outFamilyName.c_str(), face, face->getRefCnt());
return face;
}
#ifdef SK_FONTHOST_DOES_NOT_USE_FONTMGR
SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace,
const char familyName[],
SkTypeface::Style style) {
return FontConfigTypeface::LegacyCreateTypeface(familyFace, familyName,
style);
}
SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream) {
if (!stream) {
return NULL;
}
const size_t length = stream->getLength();
if (!length) {
return NULL;
}
if (length >= 1024 * 1024 * 1024) {
return NULL; // don't accept too large fonts (>= 1GB) for safety.
}
// ask freetype for reported style and if it is a fixed width font
SkTypeface::Style style = SkTypeface::kNormal;
bool isFixedWidth = false;
if (!SkTypeface_FreeType::ScanFont(stream, 0, NULL, &style, &isFixedWidth)) {
return NULL;
}
SkTypeface* face = SkNEW_ARGS(FontConfigTypeface, (style, isFixedWidth, stream));
return face;
}
SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[]) {
SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path));
return stream.get() ? CreateTypefaceFromStream(stream) : NULL;
}
#endif
///////////////////////////////////////////////////////////////////////////////
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 (NULL != 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::onGetFontDescriptor(SkFontDescriptor* desc,
bool* isLocalStream) const {
desc->setFamilyName(this->getFamilyName());
*isLocalStream = SkToBool(this->getLocalStream());
}
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