C++ SkRecord::visit方法代码示例

void SkBigPicture::Analysis::init(const SkRecord& record) {
    TRACE_EVENT0("disabled-by-default-skia", "SkBigPicture::Analysis::init()");
    SkBitmapHunter bitmap;
    SkPathCounter  path;

    bool hasBitmap = false;
    for (int i = 0; i < record.count(); i++) {
        hasBitmap = hasBitmap || record.visit(i, bitmap);
        record.visit(i, path);
    }

    fWillPlaybackBitmaps        = hasBitmap;
    fNumSlowPathsAndDashEffects = SkTMin<int>(path.fNumSlowPathsAndDashEffects, 255);
}

void SkRecordDraw(const SkRecord& record,
                  SkCanvas* canvas,
                  SkPicture const* const drawablePicts[],
                  SkDrawable* const drawables[],
                  int drawableCount,
                  const SkBBoxHierarchy* bbh,
                  SkPicture::AbortCallback* callback) {
    SkAutoCanvasRestore saveRestore(canvas, true /*save now, restore at exit*/);

    if (bbh) {
        // Draw only ops that affect pixels in the canvas's current clip.
        // The SkRecord and BBH were recorded in identity space.  This canvas
        // is not necessarily in that same space.  getClipBounds() returns us
        // this canvas' clip bounds transformed back into identity space, which
        // lets us query the BBH.
        SkRect query;
        if (!canvas->getClipBounds(&query)) {
            query.setEmpty();
        }

        SkTDArray<int> ops;
        bbh->search(query, &ops);

        SkRecords::Draw draw(canvas, drawablePicts, drawables, drawableCount);
        for (int i = 0; i < ops.count(); i++) {
            if (callback && callback->abort()) {
                return;
            }
            // This visit call uses the SkRecords::Draw::operator() to call
            // methods on the |canvas|, wrapped by methods defined with the
            // DRAW() macro.
            record.visit(ops[i], draw);
        }
    } else {
        // Draw all ops.
        SkRecords::Draw draw(canvas, drawablePicts, drawables, drawableCount);
        for (int i = 0; i < record.count(); i++) {
            if (callback && callback->abort()) {
                return;
            }
            // This visit call uses the SkRecords::Draw::operator() to call
            // methods on the |canvas|, wrapped by methods defined with the
            // DRAW() macro.
            record.visit(i, draw);
        }
    }
}

void SkRecordFillBounds(const SkRect& cullRect, const SkRecord& record, SkRect bounds[]) {
    SkRecords::FillBounds visitor(cullRect, record, bounds);
    for (int curOp = 0; curOp < record.count(); curOp++) {
        visitor.setCurrentOp(curOp);
        record.visit(curOp, visitor);
    }
    visitor.cleanUp();
}

void DumpRecord(const SkRecord& record,
                  SkCanvas* canvas,
                  bool timeWithCommand) {
    Dumper dumper(canvas, record.count(), timeWithCommand);
    for (int i = 0; i < record.count(); i++) {
        record.visit(i, dumper);
    }
}

void SkRecordPartialDraw(const SkRecord& record, SkCanvas* canvas,
                         SkPicture const* const drawablePicts[], int drawableCount,
                         int start, int stop,
                         const SkMatrix& initialCTM) {
    SkAutoCanvasRestore saveRestore(canvas, true /*save now, restore at exit*/);

    stop = SkTMin(stop, record.count());
    SkRecords::Draw draw(canvas, drawablePicts, nullptr, drawableCount, &initialCTM);
    for (int i = start; i < stop; i++) {
        record.visit(i, draw);
    }
}

void SkRecordDraw(const SkRecord& record, SkCanvas* canvas) {
    for (Draw draw(canvas); draw.index() < record.count(); draw.next()) {
        record.visit(draw.index(), draw);
    }
}

 void apply(const SkRecord& record) {
     for (int i = 0; i < record.count(); i++) {
         record.visit(i, *this);
     }
 }