C++ SkApply类代码示例

void SkApply::enableCreate(SkAnimateMaker& maker) {
    SkString newID;
    for (int step = 0; step <= steps; step++) {
        fLastTime = step * SK_MSec1;
        bool success = maker.computeID(scope, this, &newID);
        if (success == false)
            return;
        if (maker.find(newID.c_str(), NULL))
            continue;
        SkApply* copy = (SkApply*) deepCopy(&maker); // work on copy of animator state
        if (mode == kMode_create)
            copy->mode = (Mode) -1;
        SkDrawable* copyScope = copy->scope = (SkDrawable*) scope->deepCopy(&maker);
        *fScopes.append() = copyScope;
        if (copyScope->resolveIDs(maker, scope, this)) {
            step = steps; // quit
            goto next; // resolveIDs failed
        }
        if (newID.size() > 0) 
            maker.setID(copyScope, newID);
        if (copy->resolveIDs(maker, this, this)) { // fix up all fields, including target
            step = steps; // quit
            goto next; // resolveIDs failed
        }
        copy->activate(maker);
        copy->interpolate(maker, step * SK_MSec1);
        maker.removeActive(copy->fActive);
    next:
        delete copy;
    }
}

 virtual SkScalar next(SkPath* dst, SkScalar distance, SkPathMeasure& )
 {
     fMaker->setExtraPropertyCallBack(fDraw->fType, GetDistance, &distance);
     SkDrawPath* drawPath = NULL;
     if (fDraw->addPath->isPath()) {
         drawPath = (SkDrawPath*) fDraw->addPath;
     } else {
         SkApply* apply = (SkApply*) fDraw->addPath;
         apply->refresh(*fMaker);
         apply->activate(*fMaker);
         apply->interpolate(*fMaker, SkScalarMulRound(distance, 1000));
         drawPath = (SkDrawPath*) apply->getScope();
     }
     SkMatrix m;
     m.reset();
     if (fDraw->addMatrix) {
         SkDrawMatrix* matrix;
         if (fDraw->addMatrix->getType() == SkType_Matrix)
             matrix = (SkDrawMatrix*) fDraw->addMatrix;
         else {
             SkApply* apply = (SkApply*) fDraw->addMatrix;
             apply->refresh(*fMaker);
             apply->activate(*fMaker);
             apply->interpolate(*fMaker, SkScalarMulRound(distance, 1000));
             matrix = (SkDrawMatrix*) apply->getScope();
         }
     }
     SkScalar result = 0;
     SkAnimatorScript::EvaluateFloat(*fMaker, NULL, fDraw->spacing.c_str(), &result);
     if (drawPath)
         dst->addPath(drawPath->getPath(), m);
     fMaker->clearExtraPropertyCallBack(fDraw->fType);
     return result;
 }

void SkDisplayList::reset() {
    for (int index = 0; index < fDrawList.count(); index++) {
        SkADrawable* draw = fDrawList[index];
        if (draw->isApply() == false)
            continue;
        SkApply* apply = (SkApply*) draw;
        apply->reset();
    }
}

void SkAnimateMaker::doDelayedEvent() {
    fEnableTime = getAppTime();
    for (int index = 0; index < fDelayed.count(); ) {
        SkDisplayable* child = fDelayed[index];
        SkASSERT(child->isApply());
        SkApply* apply = (SkApply*) child;
        apply->interpolate(*this, fEnableTime);
        if (apply->hasDelayedAnimator())
            index++;
        else
            fDelayed.remove(index);
    }
}

void SkDisplayEvent::populateInput(SkAnimateMaker& maker, const SkEvent& fEvent) {
    const SkMetaData& meta = fEvent.getMetaData();
    SkMetaData::Iter iter(meta);
    SkMetaData::Type    type;
    int number;
    const char* name;
    while ((name = iter.next(&type, &number)) != NULL) {
        if (name[0] == '\0')
            continue;
        SkDisplayable* displayable;
        SkInput* input;
        for (int index = 0; index < fChildren.count(); index++) {
            displayable = fChildren[index];
            if (displayable->getType() != SkType_Input)
                continue;
            input = (SkInput*) displayable;
            if (input->name.equals(name))
                goto found;
        }
        if (!maker.find(name, &displayable) || displayable->getType() != SkType_Input)
            continue;
        input = (SkInput*) displayable;
    found:
        switch (type) {
            case SkMetaData::kS32_Type:
                meta.findS32(name, &input->fInt);
                break;
            case SkMetaData::kScalar_Type:
                meta.findScalar(name, &input->fFloat);
                break;
            case SkMetaData::kPtr_Type:
                SkASSERT(0);
                break; // !!! not handled for now
            case SkMetaData::kString_Type:
                input->string.set(meta.findString(name));
                break;
            default:
                SkASSERT(0);
        }
    }
    // re-evaluate all animators that may have built their values from input strings
    for (SkDisplayable** childPtr = fChildren.begin(); childPtr < fChildren.end(); childPtr++) {
        SkDisplayable* displayable = *childPtr;
        if (displayable->isApply() == false)
            continue;
        SkApply* apply = (SkApply*) displayable;
        apply->refresh(maker);
    }
}

void SkGroup::reset() {
    if (fOriginal)  // has been copied
        return;
    int index = 0;
    int max = fCopies.count() << 5;
    for (SkDrawable** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) {
        if (index >= max || copySet(index) == false)
            continue;
        SkApply* apply = (SkApply*) *ptr;
        SkASSERT(apply->isApply());
        SkASSERT(apply->getScope());
        *ptr = apply->getScope();
        markCopyClear(index);
        index++;
    }
}

    virtual void next(const SkPoint& loc, int u, int v, SkPath* dst)
    {
        fLoc = loc;
        fU = u;
        fV = v;
        SkDrawPath* drawPath;
        fMaker->setExtraPropertyCallBack(fDraw->fType, Get2D, this);
        if (fDraw->addPath->isPath()) {
            drawPath = (SkDrawPath*) fDraw->addPath;
        } else {
            SkApply* apply = (SkApply*) fDraw->addPath;
            apply->refresh(*fMaker);
            apply->activate(*fMaker);
            apply->interpolate(*fMaker, v);
            drawPath = (SkDrawPath*) apply->getScope();
        }
        if (drawPath == NULL)
            goto clearCallBack;
        if (fDraw->matrix) {
            SkDrawMatrix* matrix;
            if (fDraw->matrix->getType() == SkType_Matrix) 
                matrix = (SkDrawMatrix*) fDraw->matrix;
            else {
                SkApply* apply = (SkApply*) fDraw->matrix;
                apply->activate(*fMaker);
                apply->interpolate(*fMaker, v);
                matrix = (SkDrawMatrix*) apply->getScope();
            }
            if (matrix) {
                dst->addPath(drawPath->getPath(), matrix->getMatrix());
                goto clearCallBack;
            }
        }
        dst->addPath(drawPath->getPath());
clearCallBack:
        fMaker->clearExtraPropertyCallBack(fDraw->fType);
    }

bool SkApply::enable(SkAnimateMaker& maker) {
    fEnabled = true;
    bool initialized = fActive != NULL;
    if (dynamicScope.size() > 0)
        enableDynamic(maker);
    if (maker.fError.hasError()) 
        return false;
    int animators = fAnimators.count();
    int index;
    for (index = 0; index < animators; index++) {
        SkAnimateBase* animator = fAnimators[index];
        animator->fStart = maker.fEnableTime;
        animator->fResetPending = animator->fReset;
    }
    if (scope && scope->isApply())
        ((SkApply*) scope)->setEmbedded();
/*  if (mode == kMode_once) {
        if (scope) {
            activate(maker);
            interpolate(maker, maker.fEnableTime);
            inactivate(maker);
        }
        return true;
    }*/
    if ((mode == kMode_immediate || mode == kMode_create) && scope == NULL)
        return false;   // !!! error?
    bool enableMe = scope && (scope->hasEnable() || scope->isApply() || scope->isDrawable() == false);
    if (mode == kMode_immediate && enableMe || mode == kMode_create)
        activate(maker);    // for non-drawables like post, prime them here
    if (mode == kMode_immediate && enableMe)
        fActive->enable();
    if (mode == kMode_create && scope != NULL) {
        enableCreate(maker);
        return true;
    }
    if (mode == kMode_immediate) {
        return scope->isApply() || scope->isDrawable() == false;
    }
    refresh(maker);
    SkDisplayList& displayList = maker.fDisplayList;
    SkDrawable* drawable;
#if defined SK_DEBUG && defined SK_DEBUG_ANIMATION_TIMING
    SkString debugOut;
    SkMSec time = maker.getAppTime();
    debugOut.appendS32(time - maker.fDebugTimeBase);
    debugOut.append(" apply enable id=");
    debugOut.append(_id);
    debugOut.append("; start=");
    debugOut.appendS32(maker.fEnableTime - maker.fDebugTimeBase);
    SkDebugf("%s\n", debugOut.c_str());
#endif
    if (scope == NULL || scope->isApply() || scope->getType() == SkType_Movie || scope->isDrawable() == false) {
        activate(maker);    // for non-drawables like post, prime them here
        if (initialized) {
            append(this);
        }
        fEnabling = true;
        interpolate(maker, maker.fEnableTime);
        fEnabling = false;
        if (scope != NULL && dontDraw == false)
            scope->enable(maker);
        return true;
    } else if (initialized && restore == false)
        append(this);
#if 0
    bool wasActive = inactivate(maker); // start fresh
    if (wasActive) {
        activate(maker);
        interpolate(maker, maker.fEnableTime);
        return true;
    }
#endif
//  start here;
    // now that one apply might embed another, only the parent apply should replace the scope 
    // or get appended to the display list
    // similarly, an apply added by an add immediate has already been located in the display list
    // and should not get moved or added again here
    if (fEmbedded) {
        return false;   // already added to display list by embedder
    }
    drawable = (SkDrawable*) scope;
    SkTDDrawableArray* parentList;
    SkTDDrawableArray* grandList;
    SkGroup* parentGroup;
    SkGroup* thisGroup;
    int old = displayList.findGroup(drawable, &parentList, &parentGroup, &thisGroup, &grandList);
    if (old < 0)
        goto append;
    else if (fContainsScope) {
        if ((*parentList)[old] != this || restore == true) {
append:
            if (parentGroup)
                parentGroup->markCopySize(old);
            if (parentList->count() < 10000) {
                fAppended = true;
                *parentList->append() = this;
            } else
                maker.setErrorCode(SkDisplayXMLParserError::kDisplayTreeTooDeep);
            old = -1;
        } else
//.........这里部分代码省略.........