C++ SkTScopedComPtr类代码示例

SkTypeface::LocalizedStrings* DWriteFontTypeface::onCreateFamilyNameIterator() const {
    SkTypeface::LocalizedStrings* nameIter =
        SkOTUtils::LocalizedStrings_NameTable::CreateForFamilyNames(*this);
    if (nullptr == nameIter) {
        SkTScopedComPtr<IDWriteLocalizedStrings> familyNames;
        HRNM(fDWriteFontFamily->GetFamilyNames(&familyNames), "Could not obtain family names.");
        nameIter = new LocalizedStrings_IDWriteLocalizedStrings(familyNames.release());
    }
    return nameIter;
}

HRESULT StreamFontFileLoader::CreateStreamFromKey(
    void const* fontFileReferenceKey,
    UINT32 fontFileReferenceKeySize,
    IDWriteFontFileStream** fontFileStream)
{
    SkTScopedComPtr<SkDWriteFontFileStreamWrapper> stream;
    HR(SkDWriteFontFileStreamWrapper::Create(fStream->duplicate(), &stream));
    *fontFileStream = stream.release();
    return S_OK;
}

static HRESULT are_same(IUnknown* a, IUnknown* b, bool& same) {
    SkTScopedComPtr<IUnknown> iunkA;
    HRM(a->QueryInterface(&iunkA), "Failed to QI<IUnknown> for a.");

    SkTScopedComPtr<IUnknown> iunkB;
    HRM(b->QueryInterface(&iunkB), "Failed to QI<IUnknown> for b.");

    same = (iunkA.get() == iunkB.get());
    return S_OK;
}

HRESULT StreamFontCollectionLoader::CreateEnumeratorFromKey(
    IDWriteFactory* factory,
    void const* collectionKey,
    UINT32 collectionKeySize,
    IDWriteFontFileEnumerator** fontFileEnumerator)
{
    SkTScopedComPtr<StreamFontFileEnumerator> enumerator;
    HR(StreamFontFileEnumerator::Create(factory, fFontFileLoader.get(), &enumerator));
    *fontFileEnumerator = enumerator.release();
    return S_OK;
}

void DWriteFontTypeface::onGetFontDescriptor(SkFontDescriptor* desc,
                                             bool* isLocalStream) const {
    // Get the family name.
    SkTScopedComPtr<IDWriteLocalizedStrings> familyNames;
    HRV(fDWriteFontFamily->GetFamilyNames(&familyNames));

    SkString utf8FamilyName;
    sk_get_locale_string(familyNames.get(), nullptr/*fMgr->fLocaleName.get()*/, &utf8FamilyName);

    desc->setFamilyName(utf8FamilyName.c_str());
    *isLocalStream = SkToBool(fDWriteFontFileLoader.get());
}

void SkFontStyleSet_DirectWrite::getStyle(int index, SkFontStyle* fs, SkString* styleName) {
    SkTScopedComPtr<IDWriteFont> font;
    HRVM(fFontFamily->GetFont(index, &font), "Could not get font.");

    if (fs) {
        SkFontStyle::Slant slant;
        switch (font->GetStyle()) {
        case DWRITE_FONT_STYLE_NORMAL:
            slant = SkFontStyle::kUpright_Slant;
            break;
        case DWRITE_FONT_STYLE_OBLIQUE:
        case DWRITE_FONT_STYLE_ITALIC:
            slant = SkFontStyle::kItalic_Slant;
            break;
        default:
            SkASSERT(false);
        }

        int weight = font->GetWeight();
        int width = font->GetStretch();

        *fs = SkFontStyle(weight, width, slant);
    }

    if (styleName) {
        SkTScopedComPtr<IDWriteLocalizedStrings> faceNames;
        if (SUCCEEDED(font->GetFaceNames(&faceNames))) {
            sk_get_locale_string(faceNames.get(), fFontMgr->fLocaleName.get(), styleName);
        }
    }
}

HRESULT SkScalerContext_DW::getBoundingBox(SkGlyph* glyph,
        DWRITE_RENDERING_MODE renderingMode,
        DWRITE_TEXTURE_TYPE textureType,
        RECT* bbox)
{
    //Measure raster size.
    fXform.dx = SkFixedToFloat(glyph->getSubXFixed());
    fXform.dy = SkFixedToFloat(glyph->getSubYFixed());

    FLOAT advance = 0;

    UINT16 glyphId = glyph->getGlyphID();

    DWRITE_GLYPH_OFFSET offset;
    offset.advanceOffset = 0.0f;
    offset.ascenderOffset = 0.0f;

    DWRITE_GLYPH_RUN run;
    run.glyphCount = 1;
    run.glyphAdvances = &advance;
    run.fontFace = fTypeface->fDWriteFontFace.get();
    run.fontEmSize = SkScalarToFloat(fTextSizeRender);
    run.bidiLevel = 0;
    run.glyphIndices = &glyphId;
    run.isSideways = FALSE;
    run.glyphOffsets = &offset;

    SkTScopedComPtr<IDWriteGlyphRunAnalysis> glyphRunAnalysis;
    {
        SkAutoExclusive l(DWriteFactoryMutex);
        HRM(fTypeface->fFactory->CreateGlyphRunAnalysis(
                &run,
                1.0f, // pixelsPerDip,
                &fXform,
                renderingMode,
                fMeasuringMode,
                0.0f, // baselineOriginX,
                0.0f, // baselineOriginY,
                &glyphRunAnalysis),
            "Could not create glyph run analysis.");
    }
    {
        Shared l(DWriteFactoryMutex);
        HRM(glyphRunAnalysis->GetAlphaTextureBounds(textureType, bbox),
            "Could not get texture bounds.");
    }
    return S_OK;
}

SkTypeface* SkFontStyleSet_DirectWrite::matchStyle(const SkFontStyle& pattern) {
    DWRITE_FONT_STYLE slant;
    switch (pattern.slant()) {
    case SkFontStyle::kUpright_Slant:
        slant = DWRITE_FONT_STYLE_NORMAL;
        break;
    case SkFontStyle::kItalic_Slant:
        slant = DWRITE_FONT_STYLE_ITALIC;
        break;
    default:
        SkASSERT(false);
    }

    DWRITE_FONT_WEIGHT weight = (DWRITE_FONT_WEIGHT)pattern.weight();
    DWRITE_FONT_STRETCH width = (DWRITE_FONT_STRETCH)pattern.width();

    SkTScopedComPtr<IDWriteFont> font;
    // TODO: perhaps use GetMatchingFonts and get the least simulated?
    HRNM(fFontFamily->GetFirstMatchingFont(weight, width, slant, &font),
         "Could not match font in family.");

    SkTScopedComPtr<IDWriteFontFace> fontFace;
    HRNM(font->CreateFontFace(&fontFace), "Could not create font face.");

    return fFontMgr->createTypefaceFromDWriteFont(fontFace.get(), font.get(),
                                                  fFontFamily.get());
}

SkStreamAsset* DWriteFontTypeface::onOpenStream(int* ttcIndex) const {
    *ttcIndex = fDWriteFontFace->GetIndex();

    UINT32 numFiles;
    HRNM(fDWriteFontFace->GetFiles(&numFiles, nullptr),
         "Could not get number of font files.");
    if (numFiles != 1) {
        return nullptr;
    }

    SkTScopedComPtr<IDWriteFontFile> fontFile;
    HRNM(fDWriteFontFace->GetFiles(&numFiles, &fontFile), "Could not get font files.");

    const void* fontFileKey;
    UINT32 fontFileKeySize;
    HRNM(fontFile->GetReferenceKey(&fontFileKey, &fontFileKeySize),
         "Could not get font file reference key.");

    SkTScopedComPtr<IDWriteFontFileLoader> fontFileLoader;
    HRNM(fontFile->GetLoader(&fontFileLoader), "Could not get font file loader.");

    SkTScopedComPtr<IDWriteFontFileStream> fontFileStream;
    HRNM(fontFileLoader->CreateStreamFromKey(fontFileKey, fontFileKeySize,
                                             &fontFileStream),
         "Could not create font file stream.");

    return new SkDWriteFontFileStream(fontFileStream.get());
}

void DWriteFontTypeface::onGetFontDescriptor(SkFontDescriptor* desc,
                                             bool* isLocalStream) const {
    // Get the family name.
    SkTScopedComPtr<IDWriteLocalizedStrings> dwFamilyNames;
    HRV(fDWriteFontFamily->GetFamilyNames(&dwFamilyNames));

    UINT32 dwFamilyNamesLength;
    HRV(dwFamilyNames->GetStringLength(0, &dwFamilyNamesLength));

    SkSMallocWCHAR dwFamilyNameChar(dwFamilyNamesLength+1);
    HRV(dwFamilyNames->GetString(0, dwFamilyNameChar.get(), dwFamilyNamesLength+1));

    SkString utf8FamilyName;
    HRV(sk_wchar_to_skstring(dwFamilyNameChar.get(), &utf8FamilyName));

    desc->setFamilyName(utf8FamilyName.c_str());
    *isLocalStream = SkToBool(fDWriteFontFileLoader.get());
}

SkTypeface* SkFontStyleSet_DirectWrite::createTypeface(int index) {
    SkTScopedComPtr<IDWriteFont> font;
    HRNM(fFontFamily->GetFont(index, &font), "Could not get font.");

    SkTScopedComPtr<IDWriteFontFace> fontFace;
    HRNM(font->CreateFontFace(&fontFace), "Could not create font face.");

    return fFontMgr->createTypefaceFromDWriteFont(fontFace.get(), font.get(), fFontFamily.get());
}

    // IDWriteTextRenderer methods
    virtual HRESULT STDMETHODCALLTYPE DrawGlyphRun(
        void* clientDrawingContext,
        FLOAT baselineOriginX,
        FLOAT baselineOriginY,
        DWRITE_MEASURING_MODE measuringMode,
        DWRITE_GLYPH_RUN const* glyphRun,
        DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription,
        IUnknown* clientDrawingEffect) override
    {
        SkTScopedComPtr<IDWriteFont> font;
        HRM(fOuter->fFontCollection->GetFontFromFontFace(glyphRun->fontFace, &font),
            "Could not get font from font face.");

        // It is possible that the font passed does not actually have the requested character,
        // due to no font being found and getting the fallback font.
        // Check that the font actually contains the requested character.
        BOOL exists;
        HRM(font->HasCharacter(fCharacter, &exists), "Could not find character.");

        if (exists) {
            SkTScopedComPtr<IDWriteFontFamily> fontFamily;
            HRM(font->GetFontFamily(&fontFamily), "Could not get family.");
            fResolvedTypeface = fOuter->createTypefaceFromDWriteFont(glyphRun->fontFace,
                                                                     font.get(),
                                                                     fontFamily.get());
        }

        return S_OK;
    }

bool SkImageGeneratorWIC::onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
        SkPMColor ctable[], int* ctableCount) {
    if (kN32_SkColorType != info.colorType()) {
        return false;
    }

    // Create a format converter.
    SkTScopedComPtr<IWICFormatConverter> formatConverter;
    HRESULT hr = fImagingFactory->CreateFormatConverter(&formatConverter);
    if (FAILED(hr)) {
        return false;
    }

    GUID format = GUID_WICPixelFormat32bppPBGRA;
    if (kUnpremul_SkAlphaType == info.alphaType()) {
        format = GUID_WICPixelFormat32bppBGRA;
    }

    hr = formatConverter->Initialize(fImageSource.get(), format, WICBitmapDitherTypeNone, nullptr,
            0.0, WICBitmapPaletteTypeCustom);
    if (FAILED(hr)) {
        return false;
    }

    // Treat the format converter as an image source.
    SkTScopedComPtr<IWICBitmapSource> formatConverterSrc;
    hr = formatConverter->QueryInterface(IID_PPV_ARGS(&formatConverterSrc));
    if (FAILED(hr)) {
        return false;
    }

    // Set the destination pixels.
    hr = formatConverterSrc->CopyPixels(nullptr, (UINT) rowBytes, (UINT) rowBytes * info.height(),
            (BYTE*) pixels);

    return SUCCEEDED(hr);
}

SkTypeface* SkFontStyleSet_DirectWrite::matchStyle(const SkFontStyle& pattern) {
    SkTScopedComPtr<IDWriteFont> font;
    DWriteStyle dwStyle(pattern);
    // TODO: perhaps use GetMatchingFonts and get the least simulated?
    HRNM(fFontFamily->GetFirstMatchingFont(dwStyle.fWeight, dwStyle.fWidth, dwStyle.fSlant, &font),
         "Could not match font in family.");

    SkTScopedComPtr<IDWriteFontFace> fontFace;
    HRNM(font->CreateFontFace(&fontFace), "Could not create font face.");

    return fFontMgr->createTypefaceFromDWriteFont(fontFace.get(), font.get(),
                                                  fFontFamily.get());
}

SK_API sk_sp<SkFontMgr> SkFontMgr_New_DirectWrite(IDWriteFactory* factory,
                                                  IDWriteFontCollection* collection,
                                                  IDWriteFontFallback* fallback) {
    if (nullptr == factory) {
        factory = sk_get_dwrite_factory();
        if (nullptr == factory) {
            return nullptr;
        }
    }

    SkTScopedComPtr<IDWriteFontCollection> systemFontCollection;
    if (nullptr == collection) {
        HRNM(factory->GetSystemFontCollection(&systemFontCollection, FALSE),
             "Could not get system font collection.");
        collection = systemFontCollection.get();
    }

    WCHAR localeNameStorage[LOCALE_NAME_MAX_LENGTH];
    WCHAR* localeName = nullptr;
    int localeNameLen = 0;

    // Dynamically load GetUserDefaultLocaleName function, as it is not available on XP.
    SkGetUserDefaultLocaleNameProc getUserDefaultLocaleNameProc = nullptr;
    HRESULT hr = SkGetGetUserDefaultLocaleNameProc(&getUserDefaultLocaleNameProc);
    if (nullptr == getUserDefaultLocaleNameProc) {
        SK_TRACEHR(hr, "Could not get GetUserDefaultLocaleName.");
    } else {
        localeNameLen = getUserDefaultLocaleNameProc(localeNameStorage, LOCALE_NAME_MAX_LENGTH);
        if (localeNameLen) {
            localeName = localeNameStorage;
        };
    }

    return sk_make_sp<SkFontMgr_DirectWrite>(factory, collection, fallback,
                                             localeName, localeNameLen);
}