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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 "include/core/SkFontArguments.h"
#include "include/core/SkFontMgr.h"
#include "include/core/SkFontStyle.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkStream.h"
#include "include/core/SkString.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "include/private/base/SkTArray.h"
#include "include/private/base/SkTemplates.h"
#include "src/core/SkFontDescriptor.h"
#include "src/ports/SkFontHost_FreeType_common.h"
#include "src/ports/SkFontMgr_custom.h"
#include <limits>
#include <memory>
using namespace skia_private;
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) {}
std::unique_ptr<SkStreamAsset> SkTypeface_Empty::onOpenStream(int*) const { return nullptr; }
sk_sp<SkTypeface> SkTypeface_Empty::onMakeClone(const SkFontArguments& args) const {
return sk_ref_sp(this);
}
std::unique_ptr<SkFontData> SkTypeface_Empty::onMakeFontData() 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))
{ }
std::unique_ptr<SkStreamAsset> SkTypeface_Stream::onOpenStream(int* ttcIndex) const {
*ttcIndex = fData->getIndex();
return fData->getStream()->duplicate();
}
std::unique_ptr<SkFontData> SkTypeface_Stream::onMakeFontData() const {
return std::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);
}
void SkTypeface_Stream::onGetFontDescriptor(SkFontDescriptor* desc, bool* isLocal) const {
this->SkTypeface_Custom::onGetFontDescriptor(desc, isLocal);
SkTypeface_FreeType::FontDataPaletteToDescriptorPalette(*fData, desc);
}
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)
{ }
std::unique_ptr<SkStreamAsset> SkTypeface_File::onOpenStream(int* ttcIndex) const {
*ttcIndex = this->getIndex();
return SkStream::MakeFromFile(fPath.c_str());
}
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);
}
std::unique_ptr<SkFontData> SkTypeface_File::onMakeFontData() const {
int index;
std::unique_ptr<SkStreamAsset> stream(this->onOpenStream(&index));
if (!stream) {
return nullptr;
}
return std::make_unique<SkFontData>(std::move(stream), index, 0, nullptr, 0, nullptr, 0);
}
///////////////////////////////////////////////////////////////////////////////
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.size();
}
void SkFontStyleSet_Custom::getStyle(int index, SkFontStyle* style, SkString* name) {
SkASSERT(index < fStyles.size());
if (style) {
*style = fStyles[index]->fontStyle();
}
if (name) {
name->reset();
}
}
SkTypeface* SkFontStyleSet_Custom::createTypeface(int index) {
SkASSERT(index < fStyles.size());
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", "DejaVu Serif", nullptr
};
for (size_t i = 0; i < std::size(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.size();
}
void SkFontMgr_Custom::onGetFamilyName(int index, SkString* familyName) const {
SkASSERT(index < fFamilies.size());
familyName->set(fFamilies[index]->getFamilyName());
}
SkFontStyleSet_Custom* SkFontMgr_Custom::onCreateStyleSet(int index) const {
SkASSERT(index < fFamilies.size());
return SkRef(fFamilies[index].get());
}
SkFontStyleSet_Custom* SkFontMgr_Custom::onMatchFamily(const char familyName[]) const {
for (int i = 0; i < fFamilies.size(); ++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;
}
sk_sp<SkTypeface> SkFontMgr_Custom::onMakeFromData(sk_sp<SkData> data, int ttcIndex) const {
return this->makeFromStream(std::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();
AutoSTMalloc<4, SkFixed> axisValues(axisDefinitions.size());
Scanner::computeAxisValues(axisDefinitions, position, axisValues, name);
auto data = std::make_unique<SkFontData>(
std::move(stream), args.getCollectionIndex(), args.getPalette().index,
axisValues.get(), axisDefinitions.size(),
args.getPalette().overrides, args.getPalette().overrideCount);
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;
}