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));
    }
示例#2
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    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(&paramAxisCount);
        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);
    }
示例#3
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    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(&paramAxisCount);
        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);
    }
示例#4
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    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));
        }
    }