C++ SkAnimateBase类代码示例

void SkActive::pickUp(SkActive* existing) {
    SkTDOperandArray existingValues;
    for (int index = 0; index < fAnimators.count(); index++) {
        SkAnimateBase* animate = fAnimators[index];
        SkASSERT(animate->getValuesType() == SkType_Float);
        int components = animate->components();
        SkOperand* from = animate->getValues();
        SkOperand* to = &from[animate->components()];
        existingValues.setCount(components);
        existing->fInterpolators[index]->timeToValues(
            existing->fState[index].fTicks - existing->fState[index].fStartTime, existingValues.begin());
        SkScalar originalSum = 0;
        SkScalar workingSum = 0;
        for (int cIndex = 0; cIndex < components; cIndex++) {
            SkScalar delta = to[cIndex].fScalar - from[cIndex].fScalar;
            originalSum += SkScalarMul(delta, delta);
            delta = to[cIndex].fScalar - existingValues[cIndex].fScalar;
            workingSum += SkScalarMul(delta, delta);
        }
        if (workingSum < originalSum) {
            SkScalar originalDistance = SkScalarSqrt(originalSum);
            SkScalar workingDistance = SkScalarSqrt(workingSum);
            existing->fState[index].fDuration = (SkMSec) SkScalarMulDiv(fState[index].fDuration, 
                workingDistance, originalDistance);
        }
        fInterpolators[index]->reset(components, 2, SkType_Float);
        fInterpolators[index]->setKeyFrame(0, 0, existingValues.begin(), animate->blend[0]);
        fInterpolators[index]->setKeyFrame(1, fState[index].fDuration, to, animate->blend[0]);
    }
}

bool SkAnimatorScript::EvalID(const char* token, size_t len, void* user, SkScriptValue* value) {
    SkAnimatorScript* engine = (SkAnimatorScript*) user;
    SkTDict<SkDisplayable*>* ids = &engine->fMaker.fIDs;
    SkDisplayable* displayable;
    bool success = ids->find(token, len, &displayable);
    if (success == false) {
        displayable = engine->fWorking;
        if (SK_LITERAL_STR_EQUAL("parent", token, len)) {
            SkDisplayable* parent = displayable->getParent();
            if (parent == false)
                parent = engine->fParent;
            if (parent) {
                value->fOperand.fDisplayable = parent;
                value->fType = SkType_Displayable;
                return true;
            }
        }
        if (displayable && EvalMember(token, len, displayable, engine, value))
            return true;
        value->fOperand.fString = NULL;
        value->fType = SkType_String;
    } else {
        SkDisplayable* working = engine->fWorking;
        value->fOperand.fDisplayable = displayable;
        value->fType = SkType_Displayable;
        if (displayable->canContainDependents() && working && working->isAnimate()) {
            SkAnimateBase* animator = (SkAnimateBase*) working;
            if (animator->isDynamic()) {
                SkDisplayDepend* depend = (SkDisplayDepend* ) displayable;
                depend->addDependent(working);
            }
        }
    }
    return true;
}

void SkApply::onEndElement(SkAnimateMaker& maker) 
{
    SkDrawable* scopePtr = scope;
    while (scopePtr && scopePtr->isApply()) {
        SkApply* scopedApply = (SkApply*) scopePtr;
        if (scopedApply->scope == this) {
            maker.setErrorCode(SkDisplayXMLParserError::kApplyScopesItself);
            return;
        }
        scopePtr = scopedApply->scope;
    }
    if (mode == kMode_create)
        return;
    if (scope != NULL && steps >= 0 && scope->isApply() == false && scope->isDrawable())
        scope->setSteps(steps);
    for (SkAnimateBase** animPtr = fAnimators.begin(); animPtr < fAnimators.end(); animPtr++) {
        SkAnimateBase* anim = *animPtr;
        //for reusing apply statements with dynamic scope
        if (anim->fTarget == NULL || anim->fTargetIsScope) {
            anim->fTargetIsScope = true;
            if (scope)
                anim->fTarget = scope;
            else
                anim->setTarget(maker);
            anim->onEndElement(maker);  // allows animate->fFieldInfo to be set
        }
        if (scope != NULL && steps >= 0 && anim->fTarget != scope && anim->fTarget->isDrawable())
            anim->fTarget->setSteps(steps);
    }
}

void SkActive::setInterpolator(int index, SkOperand* from) {
    if (from == NULL) // legitimate for set string
        return;
    SkAnimateBase* animate = fAnimators[index];
    int entries = animate->entries();
    SkASSERT(entries > 0);
    SkMSec duration = fState[index].fDuration;
    int components = animate->components();
    SkOperandInterpolator& interpolator = *fInterpolators[index];
    interpolator.reset(components, entries == 1 ? 2 : entries, animate->getValuesType()); 
    interpolator.setMirror(SkToBool(animate->fMirror));
    interpolator.setReset(SkToBool(animate->fReset));
    interpolator.setRepeatCount(animate->repeat);
    if (entries == 1) {
        interpolator.setKeyFrame(0, 0, from, animate->blend[0]);
        interpolator.setKeyFrame(1, duration, from, animate->blend[0]);
        return;
    }
    for (int entry = 0; entry < entries; entry++) {
        int blendIndex = SkMin32(animate->blend.count() - 1, entry);
        interpolator.setKeyFrame(entry, entry * duration / (entries - 1), from, 
            animate->blend[blendIndex]);
        from += components;
    }
}

void SkActive::initState(SkApply* apply, int offset) {
    int count = fState.count();
    for (int index = offset; index < count; index++) {
        SkState& state = fState[index];
        SkAnimateBase* animate = fAnimators[index];
#if 0 // def SK_DEBUG
        if (animate->fHasEndEvent)
            SkDebugf("%8x %8x active initState:\n", this, animate);
#endif
        SkOperand* from = animate->getValues();
        state.fStartTime = state.fBegin = apply->begin + animate->begin;
        state.fMode = apply->mode;
        state.fTransition = apply->transition;
#if 0
        state.fPickup = (SkBool8) apply->pickup;
#endif
        state.fRestore = (SkBool8) apply->restore;
        state.fSave = apply->begin;
        state.fStarted = false;
        state.fSteps = apply->steps;
        state.fTicks = 0;
        state.fUnpostedEndEvent = (SkBool8) animate->fHasEndEvent; 
        calcDurations(index);
        setInterpolator(index, from);
    }
    if (count == 0 && (apply->mode == SkApply::kMode_immediate || apply->mode == SkApply::kMode_create))
        fMaxTime = apply->begin + apply->steps * SK_MSec1;
}

void SkDisplayDepend::dirty() {
    SkDisplayable** last = fDependents.end();
    for (SkDisplayable** depPtr = fDependents.begin(); depPtr < last; depPtr++) {
        SkAnimateBase* animate = (SkAnimateBase* ) *depPtr;
        animate->setChanged(true);
    }
}

void SkApply::refresh(SkAnimateMaker& maker) {
    for (SkAnimateBase** animPtr = fAnimators.begin(); animPtr < fAnimators.end(); animPtr++) {
        SkAnimateBase* animate = *animPtr;
        animate->onEndElement(maker);
    }
    if (fActive)
        fActive->resetInterpolators();
}

void SkActive::resetInterpolators() {
    int animators = fAnimators.count();
    for (int index = 0; index < animators; index++) {
        SkAnimateBase* animate = fAnimators[index];
        SkOperand* values = animate->getValues();
        setInterpolator(index, values);
    }
}

void SkDisplayEvent::onEndElement(SkAnimateMaker& maker)
{
    if (kind == kUser)
        return;
    maker.fEvents.addEvent(this);
    if (kind == kOnEnd) {
        SkDEBUGCODE(bool found = ) maker.find(target.c_str(), &fTarget);
        SkASSERT(found);
        SkASSERT(fTarget && fTarget->isAnimate());
        SkAnimateBase* animate = (SkAnimateBase*) fTarget;
        animate->setHasEndEvent();
    }

void SkActive::fixInterpolator(SkBool save) {
    int animators = fAnimators.count();
    for (int index = 0; index < animators; index++) {
        SkAnimateBase* animate = fAnimators[index];
        if (save) { // saved slots increased
            animate->refresh(fMaker);
            SkOperand* values = animate->getValues();
            setInterpolator(index, values);
            saveInterpolatorValues(index);
        } else
            restoreInterpolatorValues(index);
    }
}

void SkApply::dump(SkAnimateMaker* maker) {
    dumpBase(maker);
    if (dynamicScope.isEmpty() == false)
        SkDebugf("dynamicScope=\"%s\" ", dynamicScope.c_str());
    if (dontDraw)
        SkDebugf("dontDraw=\"true\" ");
    if (begin != 0) //perhaps we want this no matter what?
        SkDebugf("begin=\"%g\" ", (float) begin/1000.0f);   //is this correct?
    if (interval != (SkMSec) -1)
        SkDebugf("interval=\"%g\" ", (float) interval/1000.0f);
    if (steps != -1)
        SkDebugf("steps=\"%d\" ", steps);
    if (restore)
        SkDebugf("restore=\"true\" ");
    if (transition == kTransition_reverse)
        SkDebugf("transition=\"reverse\" ");
    if (mode == kMode_immediate) {
        SkDebugf("mode=\"immediate\" ");
    }
    else if (mode == kMode_create) {
        SkDebugf("mode=\"create\" ");
    }
    bool closedYet = false;
    SkDisplayList::fIndent += 4;
    int save = SkDisplayList::fDumpIndex;
    if (scope) {
        if (closedYet == false) {
            SkDebugf(">\n");
            closedYet = true;
        }
        scope->dump(maker);
    }
    int index;
//  if (fActive) {
        for (index = 0; index < fAnimators.count(); index++) {
            if (closedYet == false) {
                SkDebugf(">\n");
                closedYet = true;
            }
            SkAnimateBase* animator = fAnimators[index];
            animator->dump(maker);
//      }
    }
    SkDisplayList::fIndent -= 4;
    SkDisplayList::fDumpIndex = save;
    if (closedYet)
        dumpEnd(maker);
    else
        SkDebugf("/>\n");
}

void SkActive::create(SkADrawable* drawable, SkMSec time) {
    fApply.fLastTime = time;
    fApply.refresh(fMaker);
    for (int index = 0; index < fAnimators.count(); index++) {
        SkAnimateBase* animate = fAnimators[index];
        SkOperandInterpolator& interpolator = *fInterpolators[index];
        int count = animate->components();
        if (animate->formula.size() > 0) {
            SkTDOperandArray values;
            values.setCount(count);
            SkDEBUGCODE(bool success = ) animate->fFieldInfo->setValue(fMaker, &values, 0, 0, NULL,
                animate->getValuesType(), animate->formula);
            SkASSERT(success);
            fApply.applyValues(index, values.begin(), count, animate->getValuesType(), time);
        } else {

bool SkApply::setProperty(int index, SkScriptValue& scriptValue) {
    switch (index) {
        case SK_PROPERTY(animator): {
            SkAnimateBase* animate = (SkAnimateBase*) scriptValue.fOperand.fDisplayable;
            SkASSERT(animate->isAnimate());
            *fAnimators.append() = animate;
            return true; 
        }
        case SK_PROPERTY(steps):
            steps = scriptValue.fOperand.fS32;
            if (fActive)
                fActive->setSteps(steps);
            return true;
    }
    return false;
}

void SkApply::applyValues(int animatorIndex, SkOperand* values, int count,
     SkDisplayTypes valuesType, SkMSec time) 
{
    SkAnimateBase* animator = fActive->fAnimators[animatorIndex];
    const SkMemberInfo * info = animator->fFieldInfo;
    SkASSERT(animator);
    SkASSERT(info != NULL);
    SkDisplayTypes type = (SkDisplayTypes) info->fType;
    SkDisplayable* target = getTarget(animator);
    if (animator->hasExecute() || type == SkType_MemberFunction || type == SkType_MemberProperty) {
        SkDisplayable* executor = animator->hasExecute() ? animator : target;
        if (type != SkType_MemberProperty) {
            SkTDArray<SkScriptValue> typedValues;
            for (int index = 0; index < count; index++) {
                SkScriptValue temp;
                temp.fType = valuesType;
                temp.fOperand = values[index];
                *typedValues.append() = temp;
            }
            executor->executeFunction(target, info->functionIndex(), typedValues, info->getType(), NULL);
        } else {
            SkScriptValue scriptValue;
            scriptValue.fOperand = values[0];
            scriptValue.fType = info->getType();
            target->setProperty(info->propertyIndex(), scriptValue);
        }
    } else {
        SkTypedArray converted;
        if (type == SkType_ARGB) {
            if (count == 4) {
                // !!! assert that it is SkType_Float ?
                animator->packARGB(&values->fScalar, count, &converted);
                values = converted.begin();
                count = converted.count();
            } else {
                SkASSERT(count == 1);
            }
        }
//      SkASSERT(type == SkType_ARGB || type == SkType_String ||info->isSettable());
        if (type == SkType_String || type == SkType_DynamicString)
            info->setString(target, values->fString);
        else if (type == SkType_Drawable || type == SkType_Displayable)
            target->setReference(info, values->fDisplayable);
        else
            info->setValue(target, values, count);
    } 
}

bool SkActive::immediate(bool enable) {
    SkMSec time = 0;
    bool result = false;
    SkDrawable* drawable = fApply.scope;
    SkMSec final = fMaxTime;
    do {
        bool applied = fAnimators.count() == 0;
        fApply.fLastTime = time;
        fApply.refresh(fMaker);
        for (int index = 0; index < fAnimators.count(); index++) {
            SkAnimateBase* animate = fAnimators[index];
            SkState& state = fState[index];
            if (state.fMode != SkApply::kMode_immediate)
                continue;
            if (state.fBegin > time)
                continue;
            if (time > state.fBegin + state.fDuration)
                continue;
            applied = true;
            SkOperandInterpolator& interpolator = *fInterpolators[index];
            int count = animate->components();
            if (animate->formula.size() > 0) {
                SkTDOperandArray values;
                values.setCount(count);
                bool success = animate->fFieldInfo->setValue(fMaker, &values, 0, 0, NULL, 
                    animate->getValuesType(), animate->formula);
                SkASSERT(success);
                fApply.applyValues(index, values.begin(), count, animate->getValuesType(), time);
            } else {
                SkAutoSTMalloc<16, SkOperand> values(count);
                interpolator.timeToValues(time, values.get());
                fApply.applyValues(index, values.get(), count, animate->getValuesType(), time);
            }
        }
        if (enable)
            drawable->enable(fMaker);
        else if (applied)
            result |= drawable->draw(fMaker);
        time += SK_MSec1;
    } while (time <= final);
    return result;
}