src/ports/SkFontMgr_custom.cpp - platform/external/skia - Gitiles

 /*
  * 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; }

 sk_sp<SkTypeface> SkTypeface_Empty::onMakeClone(const SkFontArguments& args) const {
     return sk_ref_sp(this);
 }

 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().release();
 }

 std::unique_ptr<SkFontData> SkTypeface_Stream::onMakeFontData() const {
     return skstd::make_unique<SkFontData>(*fData);
 }

 sk_sp<SkTypeface> SkTypeface_Stream::onMakeClone(const SkFontArguments& args) const {
     std::unique_ptr<SkFontData> data = this->cloneFontData(args);
     if (!data) {
         return nullptr;
     }

     SkString familyName;
     this->getFamilyName(&familyName);

     return sk_make_sp<SkTypeface_Stream>(std::move(data),
                                          this->fontStyle(),
                                          this->isFixedPitch(),
                                          this->isSysFont(),
                                          familyName);
 }

 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();
 }

 sk_sp<SkTypeface> SkTypeface_File::onMakeClone(const SkFontArguments& args) const {
     std::unique_ptr<SkFontData> data = this->cloneFontData(args);
     if (!data) {
         return nullptr;
     }

     SkString familyName;
     this->getFamilyName(&familyName);

     return sk_make_sp<SkTypeface_Stream>(std::move(data),
                                          this->fontStyle(),
                                          this->isFixedPitch(),
                                          this->isSysFont(),
                                          familyName);
 }

 ///////////////////////////////////////////////////////////////////////////////

 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;
 }

 sk_sp<SkTypeface> SkFontMgr_Custom::onMakeFromData(sk_sp<SkData> data, int ttcIndex) const {
     return this->makeFromStream(skstd::make_unique<SkMemoryStream>(std::move(data)), ttcIndex);
 }

 sk_sp<SkTypeface> SkFontMgr_Custom::onMakeFromStreamIndex(std::unique_ptr<SkStreamAsset> stream,
                                                           int ttcIndex) const {
     return this->makeFromStream(std::move(stream), SkFontArguments().setCollectionIndex(ttcIndex));
 }

 sk_sp<SkTypeface> SkFontMgr_Custom::onMakeFromStreamArgs(std::unique_ptr<SkStreamAsset> stream,
                                                          const SkFontArguments& args) const {
     using Scanner = SkTypeface_FreeType::Scanner;
     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 sk_sp<SkTypeface>(new SkTypeface_Stream(std::move(data), style, isFixedPitch, false, name));
 }

 sk_sp<SkTypeface> SkFontMgr_Custom::onMakeFromFontData(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 sk_sp<SkTypeface>(new SkTypeface_Stream(std::move(data), style, isFixedPitch, false, name));
 }

 sk_sp<SkTypeface> SkFontMgr_Custom::onMakeFromFile(const char path[], int ttcIndex) const {
     std::unique_ptr<SkStreamAsset> stream = SkStream::MakeFromFile(path);
     return stream ? this->makeFromStream(std::move(stream), ttcIndex) : nullptr;
 }

 sk_sp<SkTypeface> SkFontMgr_Custom::onLegacyMakeTypeface(const char familyName[],
                                                          SkFontStyle style) const {
     sk_sp<SkTypeface> tf;

     if (familyName) {
         tf.reset(this->onMatchFamilyStyle(familyName, style));
     }

     if (nullptr == tf) {
         tf.reset(fDefaultFamily->matchStyle(style));
     }

     return tf;
 }
	/*
	* 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; }

	sk_sp<SkTypeface> SkTypeface_Empty::onMakeClone(const SkFontArguments& args) const {
	return sk_ref_sp(this);
	}

	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().release();
	}

	std::unique_ptr<SkFontData> SkTypeface_Stream::onMakeFontData() const {
	return skstd::make_unique<SkFontData>(*fData);
	}

	sk_sp<SkTypeface> SkTypeface_Stream::onMakeClone(const SkFontArguments& args) const {
	std::unique_ptr<SkFontData> data = this->cloneFontData(args);
	if (!data) {
	return nullptr;
	}

	SkString familyName;
	this->getFamilyName(&familyName);

	return sk_make_sp<SkTypeface_Stream>(std::move(data),
	this->fontStyle(),
	this->isFixedPitch(),
	this->isSysFont(),
	familyName);
	}

	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();
	}

	sk_sp<SkTypeface> SkTypeface_File::onMakeClone(const SkFontArguments& args) const {
	std::unique_ptr<SkFontData> data = this->cloneFontData(args);
	if (!data) {
	return nullptr;
	}

	SkString familyName;
	this->getFamilyName(&familyName);

	return sk_make_sp<SkTypeface_Stream>(std::move(data),
	this->fontStyle(),
	this->isFixedPitch(),
	this->isSysFont(),
	familyName);
	}

	///////////////////////////////////////////////////////////////////////////////

	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;
	}

	sk_sp<SkTypeface> SkFontMgr_Custom::onMakeFromData(sk_sp<SkData> data, int ttcIndex) const {
	return this->makeFromStream(skstd::make_unique<SkMemoryStream>(std::move(data)), ttcIndex);
	}

	sk_sp<SkTypeface> SkFontMgr_Custom::onMakeFromStreamIndex(std::unique_ptr<SkStreamAsset> stream,
	int ttcIndex) const {
	return this->makeFromStream(std::move(stream), SkFontArguments().setCollectionIndex(ttcIndex));
	}

	sk_sp<SkTypeface> SkFontMgr_Custom::onMakeFromStreamArgs(std::unique_ptr<SkStreamAsset> stream,
	const SkFontArguments& args) const {
	using Scanner = SkTypeface_FreeType::Scanner;
	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 sk_sp<SkTypeface>(new SkTypeface_Stream(std::move(data), style, isFixedPitch, false, name));
	}

	sk_sp<SkTypeface> SkFontMgr_Custom::onMakeFromFontData(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 sk_sp<SkTypeface>(new SkTypeface_Stream(std::move(data), style, isFixedPitch, false, name));
	}

	sk_sp<SkTypeface> SkFontMgr_Custom::onMakeFromFile(const char path[], int ttcIndex) const {
	std::unique_ptr<SkStreamAsset> stream = SkStream::MakeFromFile(path);
	return stream ? this->makeFromStream(std::move(stream), ttcIndex) : nullptr;
	}

	sk_sp<SkTypeface> SkFontMgr_Custom::onLegacyMakeTypeface(const char familyName[],
	SkFontStyle style) const {
	sk_sp<SkTypeface> tf;

	if (familyName) {
	tf.reset(this->onMatchFamilyStyle(familyName, style));
	}

	if (nullptr == tf) {
	tf.reset(fDefaultFamily->matchStyle(style));
	}

	return tf;
	}