示例#1
0
DEF_TEST(FontHostStream, reporter) {
    {
        SkPaint paint;
        paint.setColor(SK_ColorGRAY);
        paint.setTextSize(SkIntToScalar(30));

        SkTypeface* fTypeface = SkTypeface::CreateFromName("Georgia",
                                                           SkTypeface::kNormal);
        SkSafeUnref(paint.setTypeface(fTypeface));

        SkIRect origRect = SkIRect::MakeWH(64, 64);
        SkBitmap origBitmap;
        create(&origBitmap, origRect);
        SkCanvas origCanvas(origBitmap);

        SkIRect streamRect = SkIRect::MakeWH(64, 64);
        SkBitmap streamBitmap;
        create(&streamBitmap, streamRect);
        SkCanvas streamCanvas(streamBitmap);

        SkPoint point = SkPoint::Make(24, 32);

        // Test: origTypeface and streamTypeface from orig data draw the same
        drawBG(&origCanvas);
        origCanvas.drawText("A", 1, point.fX, point.fY, paint);

        SkTypeface* origTypeface = paint.getTypeface();
        SkAutoTUnref<SkTypeface> aur;
        if (NULL == origTypeface) {
            origTypeface = aur.reset(SkTypeface::RefDefault());
        }

        int ttcIndex;
        SkAutoTDelete<SkStreamAsset> fontData(origTypeface->openStream(&ttcIndex));
        SkTypeface* streamTypeface = SkTypeface::CreateFromStream(fontData.detach());

        SkFontDescriptor desc;
        bool isLocalStream = false;
        streamTypeface->getFontDescriptor(&desc, &isLocalStream);
        REPORTER_ASSERT(reporter, isLocalStream);

        SkSafeUnref(paint.setTypeface(streamTypeface));
        drawBG(&streamCanvas);
        streamCanvas.drawPosText("A", 1, &point, paint);

        REPORTER_ASSERT(reporter,
                        compare(origBitmap, origRect, streamBitmap, streamRect));
    }
    //Make sure the typeface is deleted and removed.
    SkGraphics::PurgeFontCache();
}
示例#2
0
void SkPDFType0Font::getFontSubset(SkPDFCanon* canon) {
    const SkAdvancedTypefaceMetrics* metricsPtr =
        SkPDFFont::GetMetrics(this->typeface(), canon);
    SkASSERT(metricsPtr);
    if (!metricsPtr) { return; }
    const SkAdvancedTypefaceMetrics& metrics = *metricsPtr;
    SkASSERT(can_embed(metrics));
    SkAdvancedTypefaceMetrics::FontType type = this->getType();
    SkTypeface* face = this->typeface();
    SkASSERT(face);

    auto descriptor = sk_make_sp<SkPDFDict>("FontDescriptor");
    uint16_t emSize = SkToU16(this->typeface()->getUnitsPerEm());
    add_common_font_descriptor_entries(descriptor.get(), metrics, emSize , 0);

    int ttcIndex;
    std::unique_ptr<SkStreamAsset> fontAsset(face->openStream(&ttcIndex));
    size_t fontSize = fontAsset ? fontAsset->getLength() : 0;
    if (0 == fontSize) {
        SkDebugf("Error: (SkTypeface)(%p)::openStream() returned "
                 "empty stream (%p) when identified as kType1CID_Font "
                 "or kTrueType_Font.\n", face, fontAsset.get());
    } else {
        switch (type) {
            case SkAdvancedTypefaceMetrics::kTrueType_Font: {
                #ifdef SK_PDF_USE_SFNTLY
                if (!SkToBool(metrics.fFlags &
                              SkAdvancedTypefaceMetrics::kNotSubsettable_FontFlag)) {
                    sk_sp<SkPDFStream> subsetStream = get_subset_font_stream(
                            std::move(fontAsset), this->glyphUsage(),
                            metrics.fFontName.c_str(), ttcIndex);
                    if (subsetStream) {
                        descriptor->insertObjRef("FontFile2", std::move(subsetStream));
                        break;
                    }
                    // If subsetting fails, fall back to original font data.
                    fontAsset.reset(face->openStream(&ttcIndex));
                    SkASSERT(fontAsset);
                    SkASSERT(fontAsset->getLength() == fontSize);
                    if (!fontAsset || fontAsset->getLength() == 0) { break; }
                }
                #endif  // SK_PDF_USE_SFNTLY
                auto fontStream = sk_make_sp<SkPDFSharedStream>(std::move(fontAsset));
                fontStream->dict()->insertInt("Length1", fontSize);
                descriptor->insertObjRef("FontFile2", std::move(fontStream));
                break;
            }
            case SkAdvancedTypefaceMetrics::kType1CID_Font: {
                auto fontStream = sk_make_sp<SkPDFSharedStream>(std::move(fontAsset));
                fontStream->dict()->insertName("Subtype", "CIDFontType0C");
                descriptor->insertObjRef("FontFile3", std::move(fontStream));
                break;
            }
            default:
                SkASSERT(false);
        }
    }

    auto newCIDFont = sk_make_sp<SkPDFDict>("Font");
    newCIDFont->insertObjRef("FontDescriptor", std::move(descriptor));
    newCIDFont->insertName("BaseFont", metrics.fPostScriptName);

    switch (type) {
        case SkAdvancedTypefaceMetrics::kType1CID_Font:
            newCIDFont->insertName("Subtype", "CIDFontType0");
            break;
        case SkAdvancedTypefaceMetrics::kTrueType_Font:
            newCIDFont->insertName("Subtype", "CIDFontType2");
            newCIDFont->insertName("CIDToGIDMap", "Identity");
            break;
        default:
            SkASSERT(false);
    }
    auto sysInfo = sk_make_sp<SkPDFDict>();
    sysInfo->insertString("Registry", "Adobe");
    sysInfo->insertString("Ordering", "Identity");
    sysInfo->insertInt("Supplement", 0);
    newCIDFont->insertObject("CIDSystemInfo", std::move(sysInfo));

    int16_t defaultWidth = 0;
    {
        int emSize;
        auto glyphCache = SkPDFFont::MakeVectorCache(face, &emSize);
        sk_sp<SkPDFArray> widths = SkPDFMakeCIDGlyphWidthsArray(
                glyphCache.get(), &this->glyphUsage(), SkToS16(emSize), &defaultWidth);
        if (widths && widths->size() > 0) {
            newCIDFont->insertObject("W", std::move(widths));
        }
        newCIDFont->insertScalar(
                "DW", scaleFromFontUnits(defaultWidth, SkToS16(emSize)));
    }

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

    this->insertName("Subtype", "Type0");
    this->insertName("BaseFont", metrics.fPostScriptName);
    this->insertName("Encoding", "Identity-H");
    auto descendantFonts = sk_make_sp<SkPDFArray>();
    descendantFonts->appendObjRef(std::move(newCIDFont));
    this->insertObject("DescendantFonts", std::move(descendantFonts));

    if (metrics.fGlyphToUnicode.count() > 0) {
        this->insertObjRef("ToUnicode",
                           SkPDFMakeToUnicodeCmap(metrics.fGlyphToUnicode,
                                                  &this->glyphUsage(),
                                                  multiByteGlyphs(),
                                                  firstGlyphID(),
                                                  lastGlyphID()));
    }
    SkDEBUGCODE(fPopulated = true);
    return;
}