libs/graphics/animator/SkDrawPath.cpp

/* libs/graphics/animator/SkDrawPath.cpp
**
** Copyright 2006, Google Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License"); 
** you may not use this file except in compliance with the License. 
** You may obtain a copy of the License at 
**
**     http://www.apache.org/licenses/LICENSE-2.0 
**
** Unless required by applicable law or agreed to in writing, software 
** distributed under the License is distributed on an "AS IS" BASIS, 
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
** See the License for the specific language governing permissions and 
** limitations under the License.
*/

#include "SkDrawPath.h"
#include "SkAnimateMaker.h"
#include "SkCanvas.h"
#include "SkMath.h"
#include "SkMatrixParts.h"
#include "SkPaint.h"
#include "SkPathParts.h"

enum SkPath_Properties {
    SK_PROPERTY(fillType),
    SK_PROPERTY(length)
};

#if SK_USE_CONDENSED_INFO == 0

const SkMemberInfo SkDrawPath::fInfo[] = {
    SK_MEMBER(d, String),
    SK_MEMBER_PROPERTY(fillType, FillType),
    SK_MEMBER_PROPERTY(length, Float)
};

#endif

DEFINE_GET_MEMBER(SkDrawPath);

SkDrawPath::SkDrawPath()
{
    fParent = nil;
    fLength = SK_ScalarNaN;
    fChildHasID = false;
    fDirty = false;
}

SkDrawPath::~SkDrawPath() {
    for (SkPathPart** part = fParts.begin(); part < fParts.end();  part++)
        delete *part;
}

bool SkDrawPath::add(SkAnimateMaker& maker, SkDisplayable* child) {
    SkASSERT(child && child->isPathPart());
    SkPathPart* part = (SkPathPart*) child;
    *fParts.append() = part;
    if (part->add())
        maker.setErrorCode(SkDisplayXMLParserError::kErrorAddingToPath); 
    fDirty = false;
    return true;
}

bool SkDrawPath::childrenNeedDisposing() const { 
    return false; 
}

void SkDrawPath::dirty() { 
    fDirty = true; 
    fLength = SK_ScalarNaN;
    if (fParent)
        fParent->dirty();
}

bool SkDrawPath::draw(SkAnimateMaker& maker) {
    SkPath& path = getPath();
    SkBoundableAuto boundable(this, maker);
    maker.fCanvas->drawPath(path, *maker.fPaint);
    return false;
}

SkDisplayable* SkDrawPath::getParent() const {
    return fParent;
}

#ifdef SK_DUMP_ENABLED
void SkDrawPath::dump(SkAnimateMaker* maker) {
    dumpBase(maker);
    dumpAttrs(maker);
    bool closedYet = false;
    SkDisplayList::fIndent += 4;
    for(SkPathPart** part = fParts.begin(); part < fParts.end(); part++) {
        if (closedYet == false) {
            SkDebugf(">\n");
            closedYet = true;
        }
        (*part)->dump(maker);
    }
    SkDisplayList::fIndent -= 4;
    if (closedYet)
        dumpEnd(maker);
    else
        SkDebugf("/>\n");
}
#endif

SkPath& SkDrawPath::getPath() {
    if (fDirty == false)
        return fPath;
    if (d.size() > 0)
    {
        parseSVG();
        d.reset();
    }
    else
    {
        fPath.reset();
        for (SkPathPart** part = fParts.begin(); part < fParts.end();  part++)
            (*part)->add();
    }
    fDirty = false;
    return fPath;
}
    
void SkDrawPath::onEndElement(SkAnimateMaker& ) {
    if (d.size() > 0) {
        parseSVG();
        d.reset();
        fDirty = false;
        return;
    }
    if (fChildHasID == false) {
        for (SkPathPart** part = fParts.begin(); part < fParts.end();  part++)
            delete *part;
        fParts.reset();
        fDirty = false;
    }
}

bool SkDrawPath::getProperty(int index, SkScriptValue* value) const {
    switch (index) {
        case SK_PROPERTY(length):
            if (SkScalarIsNaN(fLength)) {
                const SkPath& path = ((SkDrawPath*) this)->getPath();
                SkPathMeasure pathMeasure(path, false);
                fLength = pathMeasure.getLength();
            }
            value->fType = SkType_Float;
            value->fOperand.fScalar = fLength;
            break;
        case SK_PROPERTY(fillType):
            value->fType = SkType_FillType;
            value->fOperand.fS32 = (int) fPath.getFillType();
            break;
        default:
            SkASSERT(0);
            return false;
    }
    return true;
}

void SkDrawPath::setChildHasID() { 
    fChildHasID = true; 
}

bool SkDrawPath::setParent(SkDisplayable* parent) {
    fParent = parent;
    return false;
}

bool SkDrawPath::setProperty(int index, SkScriptValue& value)
{
    switch (index) {
        case SK_PROPERTY(fillType):
            SkASSERT(value.fType == SkType_FillType);
            SkASSERT(value.fOperand.fS32 >= SkPath::kWinding_FillType &&
                value.fOperand.fS32 <= SkPath::kEvenOdd_FillType);
            fPath.setFillType((SkPath::FillType) value.fOperand.fS32);
            break;
        default:
            SkASSERT(0);
            return false;
    }
    return true;
}

#if SK_USE_CONDENSED_INFO == 0

const SkMemberInfo SkPolyline::fInfo[] = {
    SK_MEMBER_ARRAY(points, Float)
};

#endif

DEFINE_GET_MEMBER(SkPolyline);

bool SkPolyline::add(SkAnimateMaker& , SkDisplayable*) const {
    return false; 
}

void SkPolyline::onEndElement(SkAnimateMaker& maker) {
    INHERITED::onEndElement(maker);
    if (points.count() <= 0)
        return;
    fPath.reset();
    fPath.moveTo(points[0], points[1]);
    int count = points.count();
    for (int index = 2; index < count; index += 2)
        fPath.lineTo(points[index], points[index+1]);
}


#if SK_USE_CONDENSED_INFO == 0

const SkMemberInfo SkPolygon::fInfo[] = {
    SK_MEMBER_INHERITED
};

#endif

DEFINE_GET_MEMBER(SkPolygon);

void SkPolygon::onEndElement(SkAnimateMaker& maker) {
    INHERITED::onEndElement(maker);
    fPath.close();
}