sk_sp<SkTypeface> onMakeFromStreamArgs(std::unique_ptr<SkStreamAsset> stream,
const SkFontArguments& args) const override {
using Scanner = SkTypeface_FreeType::Scanner;
const size_t length = stream->getLength();
if (!length) {
return nullptr;
}
if (length >= 1024 * 1024 * 1024) {
return nullptr; // don't accept too large fonts (>= 1GB) for safety.
}
bool isFixedPitch;
SkFontStyle style;
SkString name;
Scanner::AxisDefinitions axisDefinitions;
if (!fScanner.scanFont(stream.get(), args.getCollectionIndex(),
&name, &style, &isFixedPitch, &axisDefinitions))
{
return nullptr;
}
SkAutoSTMalloc<4, SkFixed> axisValues(axisDefinitions.count());
Scanner::computeAxisValues(axisDefinitions, args.getVariationDesignPosition(),
axisValues, name);
auto fontData = skstd::make_unique<SkFontData>(std::move(stream),
args.getCollectionIndex(),
axisValues.get(),
axisDefinitions.count());
return sk_sp<SkTypeface>(SkTypeface_FCI::Create(std::move(fontData), std::move(name),
style, isFixedPitch));
}
SkTypeface* onCreateFromStream(SkStreamAsset* s, const FontParameters& params) const override {
using Scanner = SkTypeface_FreeType::Scanner;
SkAutoTDelete<SkStreamAsset> stream(s);
bool isFixedPitch;
SkFontStyle style;
SkString name;
Scanner::AxisDefinitions axisDefinitions;
if (!fScanner.scanFont(stream, params.getCollectionIndex(), &name, &style, &isFixedPitch,
&axisDefinitions))
{
return nullptr;
}
int paramAxisCount;
const FontParameters::Axis* paramAxes = params.getAxes(¶mAxisCount);
SkAutoSTMalloc<4, SkFixed> axisValues(axisDefinitions.count());
Scanner::computeAxisValues(axisDefinitions, paramAxes, paramAxisCount, axisValues, name);
SkFontData* data(new SkFontData(stream.release(), params.getCollectionIndex(),
axisValues.get(), axisDefinitions.count()));
return new SkTypeface_AndroidStream(data, style, isFixedPitch, name);
}
SkTypeface* onCreateFromStream(SkStreamAsset* s, const FontParameters& params) const override {
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(), params.getCollectionIndex(),
&name, &style, &isFixedPitch, &axisDefinitions))
{
return nullptr;
}
int paramAxisCount;
const FontParameters::Axis* paramAxes = params.getAxes(¶mAxisCount);
SkAutoSTMalloc<4, SkFixed> axisValues(axisDefinitions.count());
Scanner::computeAxisValues(axisDefinitions, paramAxes, paramAxisCount, axisValues, name);
auto data = skstd::make_unique<SkFontData>(std::move(stream), params.getCollectionIndex(),
axisValues.get(), axisDefinitions.count());
return new SkTypeface_Stream(std::move(data), style, isFixedPitch, false, name);
}
explicit SkFontStyleSet_Android(const FontFamily& family, const Scanner& scanner,
const bool cacheFontFiles) {
const SkString* cannonicalFamilyName = nullptr;
if (family.fNames.count() > 0) {
cannonicalFamilyName = &family.fNames[0];
}
// TODO? make this lazy
for (int i = 0; i < family.fFonts.count(); ++i) {
const FontFileInfo& fontFile = family.fFonts[i];
SkString pathName(family.fBasePath);
pathName.append(fontFile.fFileName);
SkAutoTDelete<SkStream> stream(SkStream::NewFromFile(pathName.c_str()));
if (!stream.get()) {
SkDEBUGF(("Requested font file %s does not exist or cannot be opened.\n",
pathName.c_str()));
continue;
}
const int ttcIndex = fontFile.fIndex;
SkString familyName;
SkFontStyle style;
bool isFixedWidth;
Scanner::AxisDefinitions axisDefinitions;
if (!scanner.scanFont(stream.get(), ttcIndex,
&familyName, &style, &isFixedWidth, &axisDefinitions))
{
SkDEBUGF(("Requested font file %s exists, but is not a valid font.\n",
pathName.c_str()));
continue;
}
int weight = fontFile.fWeight != 0 ? fontFile.fWeight : style.weight();
SkFontStyle::Slant slant = style.slant();
switch (fontFile.fStyle) {
case FontFileInfo::Style::kAuto: slant = style.slant(); break;
case FontFileInfo::Style::kNormal: slant = SkFontStyle::kUpright_Slant; break;
case FontFileInfo::Style::kItalic: slant = SkFontStyle::kItalic_Slant; break;
default: SkASSERT(false); break;
}
style = SkFontStyle(weight, style.width(), slant);
const SkLanguage& lang = family.fLanguage;
uint32_t variant = family.fVariant;
if (kDefault_FontVariant == variant) {
variant = kCompact_FontVariant | kElegant_FontVariant;
}
// The first specified family name overrides the family name found in the font.
// TODO: SkTypeface_AndroidSystem::onCreateFamilyNameIterator should return
// all of the specified family names in addition to the names found in the font.
if (cannonicalFamilyName != nullptr) {
familyName = *cannonicalFamilyName;
}
SkAutoSTMalloc<4, SkFixed> axisValues(axisDefinitions.count());
Scanner::computeAxisValues(axisDefinitions,
fontFile.fAxes.begin(), fontFile.fAxes.count(),
axisValues, familyName);
fStyles.push_back().reset(new SkTypeface_AndroidSystem(
pathName, cacheFontFiles, ttcIndex, axisValues.get(), axisDefinitions.count(),
style, isFixedWidth, familyName, lang, variant));
}
}