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/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkFontArguments.h"
#include "SkFontDescriptor.h"
#include "SkFontHost_FreeType_common.h"
#include "SkFontMgr.h"
#include "SkFontMgr_custom.h"
#include "SkFontStyle.h"
#include "SkMakeUnique.h"
#include "SkRefCnt.h"
#include "SkStream.h"
#include "SkString.h"
#include "SkTArray.h"
#include "SkTemplates.h"
#include "SkTypeface.h"
#include "SkTypes.h"
#include <limits>
#include <memory>
class SkData;
SkTypeface_Custom::SkTypeface_Custom(const SkFontStyle& style, bool isFixedPitch,
bool sysFont, const SkString familyName, int index)
: INHERITED(style, isFixedPitch)
, fIsSysFont(sysFont), fFamilyName(familyName), fIndex(index)
{ }
bool SkTypeface_Custom::isSysFont() const { return fIsSysFont; }
void SkTypeface_Custom::onGetFamilyName(SkString* familyName) const {
*familyName = fFamilyName;
}
void SkTypeface_Custom::onGetFontDescriptor(SkFontDescriptor* desc, bool* isLocal) const {
desc->setFamilyName(fFamilyName.c_str());
desc->setStyle(this->fontStyle());
*isLocal = !this->isSysFont();
}
int SkTypeface_Custom::getIndex() const { return fIndex; }
SkTypeface_Empty::SkTypeface_Empty() : INHERITED(SkFontStyle(), false, true, SkString(), 0) {}
SkStreamAsset* SkTypeface_Empty::onOpenStream(int*) const { return nullptr; }
SkTypeface_Stream::SkTypeface_Stream(std::unique_ptr<SkFontData> fontData,
const SkFontStyle& style, bool isFixedPitch, bool sysFont,
const SkString familyName)
: INHERITED(style, isFixedPitch, sysFont, familyName, fontData->getIndex())
, fData(std::move(fontData))
{ }
SkStreamAsset* SkTypeface_Stream::onOpenStream(int* ttcIndex) const {
*ttcIndex = fData->getIndex();
return fData->getStream()->duplicate();
}
std::unique_ptr<SkFontData> SkTypeface_Stream::onMakeFontData() const {
return skstd::make_unique<SkFontData>(*fData);
}
SkTypeface_File::SkTypeface_File(const SkFontStyle& style, bool isFixedPitch, bool sysFont,
const SkString familyName, const char path[], int index)
: INHERITED(style, isFixedPitch, sysFont, familyName, index)
, fPath(path)
{ }
SkStreamAsset* SkTypeface_File::onOpenStream(int* ttcIndex) const {
*ttcIndex = this->getIndex();
return SkStream::MakeFromFile(fPath.c_str()).release();
}
///////////////////////////////////////////////////////////////////////////////
SkFontStyleSet_Custom::SkFontStyleSet_Custom(const SkString familyName) : fFamilyName(familyName) {}
void SkFontStyleSet_Custom::appendTypeface(sk_sp<SkTypeface_Custom> typeface) {
fStyles.emplace_back(std::move(typeface));
}
int SkFontStyleSet_Custom::count() {
return fStyles.count();
}
void SkFontStyleSet_Custom::getStyle(int index, SkFontStyle* style, SkString* name) {
SkASSERT(index < fStyles.count());
if (style) {
*style = fStyles[index]->fontStyle();
}
if (name) {
name->reset();
}
}
SkTypeface* SkFontStyleSet_Custom::createTypeface(int index) {
SkASSERT(index < fStyles.count());
return SkRef(fStyles[index].get());
}
SkTypeface* SkFontStyleSet_Custom::matchStyle(const SkFontStyle& pattern) {
return this->matchStyleCSS3(pattern);
}
SkString SkFontStyleSet_Custom::getFamilyName() { return fFamilyName; }
SkFontMgr_Custom::SkFontMgr_Custom(const SystemFontLoader& loader) : fDefaultFamily(nullptr) {
loader.loadSystemFonts(fScanner, &fFamilies);
// Try to pick a default font.
static const char* defaultNames[] = {
"Arial", "Verdana", "Times New Roman", "Droid Sans", nullptr
};
for (size_t i = 0; i < SK_ARRAY_COUNT(defaultNames); ++i) {
sk_sp<SkFontStyleSet_Custom> set(this->onMatchFamily(defaultNames[i]));
if (nullptr == set) {
continue;
}
sk_sp<SkTypeface> tf(set->matchStyle(SkFontStyle(SkFontStyle::kNormal_Weight,
SkFontStyle::kNormal_Width,
SkFontStyle::kUpright_Slant)));
if (nullptr == tf) {
continue;
}
fDefaultFamily = set.get();
break;
}
if (nullptr == fDefaultFamily) {
fDefaultFamily = fFamilies[0].get();
}
}
int SkFontMgr_Custom::onCountFamilies() const {
return fFamilies.count();
}
void SkFontMgr_Custom::onGetFamilyName(int index, SkString* familyName) const {
SkASSERT(index < fFamilies.count());
familyName->set(fFamilies[index]->getFamilyName());
}
SkFontStyleSet_Custom* SkFontMgr_Custom::onCreateStyleSet(int index) const {
SkASSERT(index < fFamilies.count());
return SkRef(fFamilies[index].get());
}
SkFontStyleSet_Custom* SkFontMgr_Custom::onMatchFamily(const char familyName[]) const {
for (int i = 0; i < fFamilies.count(); ++i) {
if (fFamilies[i]->getFamilyName().equals(familyName)) {
return SkRef(fFamilies[i].get());
}
}
return nullptr;
}
SkTypeface* SkFontMgr_Custom::onMatchFamilyStyle(const char familyName[],
const SkFontStyle& fontStyle) const
{
sk_sp<SkFontStyleSet> sset(this->matchFamily(familyName));
return sset->matchStyle(fontStyle);
}
SkTypeface* SkFontMgr_Custom::onMatchFamilyStyleCharacter(const char familyName[],
const SkFontStyle&,
const char* bcp47[], int bcp47Count,
SkUnichar character) const
{
return nullptr;
}
SkTypeface* SkFontMgr_Custom::onMatchFaceStyle(const SkTypeface* familyMember,
const SkFontStyle& fontStyle) const
{
for (int i = 0; i < fFamilies.count(); ++i) {
for (int j = 0; j < fFamilies[i]->fStyles.count(); ++j) {
if (fFamilies[i]->fStyles[j].get() == familyMember) {
return fFamilies[i]->matchStyle(fontStyle);
}
}
}
return nullptr;
}
SkTypeface* SkFontMgr_Custom::onCreateFromData(SkData* data, int ttcIndex) const {
return this->createFromStream(new SkMemoryStream(sk_ref_sp(data)), ttcIndex);
}
SkTypeface* SkFontMgr_Custom::onCreateFromStream(SkStreamAsset* bareStream, int ttcIndex) const {
return this->createFromStream(bareStream, FontParameters().setCollectionIndex(ttcIndex));
}
SkTypeface* SkFontMgr_Custom::onCreateFromStream(SkStreamAsset* s,
const SkFontArguments& args) const
{
using Scanner = SkTypeface_FreeType::Scanner;
std::unique_ptr<SkStreamAsset> stream(s);
bool isFixedPitch;
SkFontStyle style;
SkString name;
Scanner::AxisDefinitions axisDefinitions;
if (!fScanner.scanFont(stream.get(), args.getCollectionIndex(),
&name, &style, &isFixedPitch, &axisDefinitions))
{
return nullptr;
}
const SkFontArguments::VariationPosition position = args.getVariationDesignPosition();
SkAutoSTMalloc<4, SkFixed> axisValues(axisDefinitions.count());
Scanner::computeAxisValues(axisDefinitions, position, axisValues, name);
auto data = skstd::make_unique<SkFontData>(std::move(stream), args.getCollectionIndex(),
axisValues.get(), axisDefinitions.count());
return new SkTypeface_Stream(std::move(data), style, isFixedPitch, false, name);
}
SkTypeface* SkFontMgr_Custom::onCreateFromFontData(std::unique_ptr<SkFontData> data) const {
bool isFixedPitch;
SkFontStyle style;
SkString name;
if (!fScanner.scanFont(data->getStream(), data->getIndex(),
&name, &style, &isFixedPitch, nullptr))
{
return nullptr;
}
return new SkTypeface_Stream(std::move(data), style, isFixedPitch, false, name);
}
SkTypeface* SkFontMgr_Custom::onCreateFromFile(const char path[], int ttcIndex) const {
std::unique_ptr<SkStreamAsset> stream = SkStream::MakeFromFile(path);
return stream.get() ? this->createFromStream(stream.release(), ttcIndex) : nullptr;
}
SkTypeface* SkFontMgr_Custom::onLegacyCreateTypeface(const char familyName[],
SkFontStyle style) const
{
SkTypeface* tf = nullptr;
if (familyName) {
tf = this->onMatchFamilyStyle(familyName, style);
}
if (nullptr == tf) {
tf = fDefaultFamily->matchStyle(style);
}
return tf;
}