C++ SkTArray::emplace_back方法代码示例

    void buildNameToFamilyMap(SkTDArray<FontFamily*> families, const bool isolated) {
        for (int i = 0; i < families.count(); i++) {
            FontFamily& family = *families[i];

            SkTArray<NameToFamily, true>* nameToFamily = &fNameToFamilyMap;
            if (family.fIsFallbackFont) {
                nameToFamily = &fFallbackNameToFamilyMap;

                if (0 == family.fNames.count()) {
                    SkString& fallbackName = family.fNames.push_back();
                    fallbackName.printf("%.2x##fallback", i);
                }
            }

            sk_sp<SkFontStyleSet_Android> newSet =
                sk_make_sp<SkFontStyleSet_Android>(family, fScanner, isolated);
            if (0 == newSet->count()) {
                continue;
            }

            for (const SkString& name : family.fNames) {
                nameToFamily->emplace_back(NameToFamily{name, newSet.get()});
            }
            fStyleSets.emplace_back(std::move(newSet));
        }
    }

// return root node.
static sk_sp<SkPDFDict> generate_page_tree(SkTArray<sk_sp<SkPDFDict>>* pages) {
    // PDF wants a tree describing all the pages in the document.  We arbitrary
    // choose 8 (kNodeSize) as the number of allowed children.  The internal
    // nodes have type "Pages" with an array of children, a parent pointer, and
    // the number of leaves below the node as "Count."  The leaves are passed
    // into the method, have type "Page" and need a parent pointer. This method
    // builds the tree bottom up, skipping internal nodes that would have only
    // one child.
    static const int kNodeSize = 8;

    // curNodes takes a reference to its items, which it passes to pageTree.
    int totalPageCount = pages->count();
    SkTArray<sk_sp<SkPDFDict>> curNodes;
    curNodes.swap(pages);

    // nextRoundNodes passes its references to nodes on to curNodes.
    int treeCapacity = kNodeSize;
    do {
        SkTArray<sk_sp<SkPDFDict>> nextRoundNodes;
        for (int i = 0; i < curNodes.count(); ) {
            if (i > 0 && i + 1 == curNodes.count()) {
                SkASSERT(curNodes[i]);
                nextRoundNodes.emplace_back(std::move(curNodes[i]));
                break;
            }

            auto newNode = sk_make_sp<SkPDFDict>("Pages");
            auto kids = sk_make_sp<SkPDFArray>();
            kids->reserve(kNodeSize);

            int count = 0;
            for (; i < curNodes.count() && count < kNodeSize; i++, count++) {
                SkASSERT(curNodes[i]);
                curNodes[i]->insertObjRef("Parent", newNode);
                kids->appendObjRef(std::move(curNodes[i]));
            }

            // treeCapacity is the number of leaf nodes possible for the
            // current set of subtrees being generated. (i.e. 8, 64, 512, ...).
            // It is hard to count the number of leaf nodes in the current
            // subtree. However, by construction, we know that unless it's the
            // last subtree for the current depth, the leaf count will be
            // treeCapacity, otherwise it's what ever is left over after
            // consuming treeCapacity chunks.
            int pageCount = treeCapacity;
            if (i == curNodes.count()) {
                pageCount = ((totalPageCount - 1) % treeCapacity) + 1;
            }
            newNode->insertInt("Count", pageCount);
            newNode->insertObject("Kids", std::move(kids));
            nextRoundNodes.emplace_back(std::move(newNode));
        }
        SkDEBUGCODE( for (const auto& n : curNodes) { SkASSERT(!n); } );

        curNodes.swap(&nextRoundNodes);
        nextRoundNodes.reset();
        treeCapacity *= kNodeSize;
    } while (curNodes.count() > 1);

void SkInternalAtlasTextTarget::addDrawOp(const GrClip& clip, std::unique_ptr<GrAtlasTextOp> op) {
    SkASSERT(clip.quickContains(SkRect::MakeIWH(fWidth, fHeight)));
    // The SkAtlasTextRenderer currently only handles grayscale SDF glyphs.
    if (op->maskType() != GrAtlasTextOp::kGrayscaleDistanceField_MaskType) {
        return;
    }
    const GrCaps& caps = *this->context()->internal().grContext()->contextPriv().caps();
    op->finalizeForTextTarget(fColor, caps);
    int n = SkTMin(kMaxBatchLookBack, fOps.count());
    for (int i = 0; i < n; ++i) {
        GrAtlasTextOp* other = fOps.fromBack(i).get();
        if (other->combineIfPossible(op.get(), caps) == GrOp::CombineResult::kMerged) {
            fOpMemoryPool->release(std::move(op));
            return;
        }
        if (GrRectsOverlap(op->bounds(), other->bounds())) {
            break;
        }
    }
    op->visitProxies([](GrSurfaceProxy*) {});
    fOps.emplace_back(std::move(op));
}

// This test hammers the GPU textblobcache and font atlas
static void text_blob_cache_inner(skiatest::Reporter* reporter, GrContext* context,
                                  int maxTotalText, int maxGlyphID, int maxFamilies, bool normal,
                                  bool stressTest) {
    // setup surface
    uint32_t flags = 0;
    SkSurfaceProps props(flags, SkSurfaceProps::kLegacyFontHost_InitType);

    // configure our context for maximum stressing of cache and atlas
    if (stressTest) {
        GrTest::SetupAlwaysEvictAtlas(context);
        context->setTextBlobCacheLimit_ForTesting(0);
    }

    SkImageInfo info = SkImageInfo::Make(kWidth, kHeight, kN32_SkColorType, kPremul_SkAlphaType);
    auto surface(SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, info, 0, &props));
    REPORTER_ASSERT(reporter, surface);
    if (!surface) {
        return;
    }

    SkCanvas* canvas = surface->getCanvas();

    sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());

    int count = SkMin32(fm->countFamilies(), maxFamilies);

    // make a ton of text
    SkAutoTArray<uint16_t> text(maxTotalText);
    for (int i = 0; i < maxTotalText; i++) {
        text[i] = i % maxGlyphID;
    }

    // generate textblobs
    SkTArray<sk_sp<SkTextBlob>> blobs;
    for (int i = 0; i < count; i++) {
        SkPaint paint;
        paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
        paint.setTextSize(48); // draw big glyphs to really stress the atlas

        SkString familyName;
        fm->getFamilyName(i, &familyName);
        sk_sp<SkFontStyleSet> set(fm->createStyleSet(i));
        for (int j = 0; j < set->count(); ++j) {
            SkFontStyle fs;
            set->getStyle(j, &fs, nullptr);

            // We use a typeface which randomy returns unexpected mask formats to fuzz
            sk_sp<SkTypeface> orig(set->createTypeface(j));
            if (normal) {
                paint.setTypeface(orig);
            } else {
                paint.setTypeface(sk_make_sp<SkRandomTypeface>(orig, paint, true));
            }

            SkTextBlobBuilder builder;
            for (int aa = 0; aa < 2; aa++) {
                for (int subpixel = 0; subpixel < 2; subpixel++) {
                    for (int lcd = 0; lcd < 2; lcd++) {
                        paint.setAntiAlias(SkToBool(aa));
                        paint.setSubpixelText(SkToBool(subpixel));
                        paint.setLCDRenderText(SkToBool(lcd));
                        if (!SkToBool(lcd)) {
                            paint.setTextSize(160);
                        }
                        const SkTextBlobBuilder::RunBuffer& run = builder.allocRun(paint,
                                                                                   maxTotalText,
                                                                                   0, 0,
                                                                                   nullptr);
                        memcpy(run.glyphs, text.get(), maxTotalText * sizeof(uint16_t));
                    }
                }
            }
            blobs.emplace_back(builder.make());
        }
    }

    // create surface where LCD is impossible
    info = SkImageInfo::MakeN32Premul(kWidth, kHeight);
    SkSurfaceProps propsNoLCD(0, kUnknown_SkPixelGeometry);
    auto surfaceNoLCD(canvas->makeSurface(info, &propsNoLCD));
    REPORTER_ASSERT(reporter, surface);
    if (!surface) {
        return;
    }

    SkCanvas* canvasNoLCD = surfaceNoLCD->getCanvas();

    // test redraw
    draw(canvas, 2, blobs);
    draw(canvasNoLCD, 2, blobs);

    // test draw after free
    context->freeGpuResources();
    draw(canvas, 1, blobs);

    context->freeGpuResources();
    draw(canvasNoLCD, 1, blobs);

    // test draw after abandon
//.........这里部分代码省略.........

std::unique_ptr<GrFragmentProcessor> GrFragmentProcessor::RunInSeries(
        std::unique_ptr<GrFragmentProcessor>* series, int cnt) {
    class SeriesFragmentProcessor : public GrFragmentProcessor {
    public:
        static std::unique_ptr<GrFragmentProcessor> Make(
                std::unique_ptr<GrFragmentProcessor>* children, int cnt) {
            return std::unique_ptr<GrFragmentProcessor>(new SeriesFragmentProcessor(children, cnt));
        }

        const char* name() const override { return "Series"; }

        std::unique_ptr<GrFragmentProcessor> clone() const override {
            SkSTArray<4, std::unique_ptr<GrFragmentProcessor>> children(this->numChildProcessors());
            for (int i = 0; i < this->numChildProcessors(); ++i) {
                if (!children.push_back(this->childProcessor(i).clone())) {
                    return nullptr;
                }
            }
            return Make(children.begin(), this->numChildProcessors());
        }

    private:
        GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
            class GLFP : public GrGLSLFragmentProcessor {
            public:
                void emitCode(EmitArgs& args) override {
                    // First guy's input might be nil.
                    SkString temp("out0");
                    this->emitChild(0, args.fInputColor, &temp, args);
                    SkString input = temp;
                    for (int i = 1; i < this->numChildProcessors() - 1; ++i) {
                        temp.printf("out%d", i);
                        this->emitChild(i, input.c_str(), &temp, args);
                        input = temp;
                    }
                    // Last guy writes to our output variable.
                    this->emitChild(this->numChildProcessors() - 1, input.c_str(), args);
                }
            };
            return new GLFP;
        }

        SeriesFragmentProcessor(std::unique_ptr<GrFragmentProcessor>* children, int cnt)
                : INHERITED(kSeriesFragmentProcessor_ClassID, OptFlags(children, cnt)) {
            SkASSERT(cnt > 1);
            for (int i = 0; i < cnt; ++i) {
                this->registerChildProcessor(std::move(children[i]));
            }
        }

        static OptimizationFlags OptFlags(std::unique_ptr<GrFragmentProcessor>* children, int cnt) {
            OptimizationFlags flags = kAll_OptimizationFlags;
            for (int i = 0; i < cnt && flags != kNone_OptimizationFlags; ++i) {
                flags &= children[i]->optimizationFlags();
            }
            return flags;
        }
        void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override {}

        bool onIsEqual(const GrFragmentProcessor&) const override { return true; }

        GrColor4f constantOutputForConstantInput(GrColor4f color) const override {
            int childCnt = this->numChildProcessors();
            for (int i = 0; i < childCnt; ++i) {
                color = ConstantOutputForConstantInput(this->childProcessor(i), color);
            }
            return color;
        }

        typedef GrFragmentProcessor INHERITED;
    };

    if (!cnt) {
        return nullptr;
    }
    if (1 == cnt) {
        return std::move(series[0]);
    }
    // Run the through the series, do the invariant output processing, and look for eliminations.
    GrProcessorAnalysisColor inputColor;
    inputColor.setToUnknown();
    GrColorFragmentProcessorAnalysis info(inputColor, unique_ptr_address_as_pointer_address(series),
                                          cnt);
    SkTArray<std::unique_ptr<GrFragmentProcessor>> replacementSeries;
    GrColor4f knownColor;
    int leadingFPsToEliminate = info.initialProcessorsToEliminate(&knownColor);
    if (leadingFPsToEliminate) {
        std::unique_ptr<GrFragmentProcessor> colorFP(
                GrConstColorProcessor::Make(knownColor, GrConstColorProcessor::InputMode::kIgnore));
        if (leadingFPsToEliminate == cnt) {
            return colorFP;
        }
        cnt = cnt - leadingFPsToEliminate + 1;
        replacementSeries.reserve(cnt);
        replacementSeries.emplace_back(std::move(colorFP));
        for (int i = 0; i < cnt - 1; ++i) {
            replacementSeries.emplace_back(std::move(series[leadingFPsToEliminate + i]));
        }
        series = replacementSeries.begin();
    }
//.........这里部分代码省略.........