skia2/tools/json/SkJSONCanvas.cpp

540 lines
22 KiB
C++

/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkJSONCanvas.h"
#include "SkMaskFilter.h"
#include "SkPaintDefaults.h"
#include "SkPath.h"
#include "SkPathEffect.h"
#include "SkRRect.h"
SkJSONCanvas::SkJSONCanvas(int width, int height, SkWStream& out)
: INHERITED(width, height)
, fOut(out)
, fRoot(Json::objectValue)
, fCommands(Json::arrayValue) {
fRoot[SKJSONCANVAS_VERSION] = Json::Value(1);
}
void SkJSONCanvas::finish() {
fRoot[SKJSONCANVAS_COMMANDS] = fCommands;
fOut.writeText(Json::FastWriter().write(fRoot).c_str());
}
Json::Value SkJSONCanvas::makePoint(const SkPoint& point) {
Json::Value result(Json::arrayValue);
result.append(Json::Value(point.x()));
result.append(Json::Value(point.y()));
return result;
}
Json::Value SkJSONCanvas::makePoint(SkScalar x, SkScalar y) {
Json::Value result(Json::arrayValue);
result.append(Json::Value(x));
result.append(Json::Value(y));
return result;
}
Json::Value SkJSONCanvas::makeRect(const SkRect& rect) {
Json::Value result(Json::arrayValue);
result.append(Json::Value(rect.left()));
result.append(Json::Value(rect.top()));
result.append(Json::Value(rect.right()));
result.append(Json::Value(rect.bottom()));
return result;
}
Json::Value SkJSONCanvas::makeRRect(const SkRRect& rrect) {
Json::Value result(Json::arrayValue);
result.append(this->makeRect(rrect.rect()));
result.append(this->makePoint(rrect.radii(SkRRect::kUpperLeft_Corner)));
result.append(this->makePoint(rrect.radii(SkRRect::kUpperRight_Corner)));
result.append(this->makePoint(rrect.radii(SkRRect::kLowerRight_Corner)));
result.append(this->makePoint(rrect.radii(SkRRect::kLowerLeft_Corner)));
return result;
}
Json::Value SkJSONCanvas::makePath(const SkPath& path) {
Json::Value result(Json::objectValue);
switch (path.getFillType()) {
case SkPath::kWinding_FillType:
result[SKJSONCANVAS_ATTRIBUTE_FILLTYPE] = SKJSONCANVAS_FILLTYPE_WINDING;
break;
case SkPath::kEvenOdd_FillType:
result[SKJSONCANVAS_ATTRIBUTE_FILLTYPE] = SKJSONCANVAS_FILLTYPE_EVENODD;
break;
case SkPath::kInverseWinding_FillType:
result[SKJSONCANVAS_ATTRIBUTE_FILLTYPE] = SKJSONCANVAS_FILLTYPE_INVERSEWINDING;
break;
case SkPath::kInverseEvenOdd_FillType:
result[SKJSONCANVAS_ATTRIBUTE_FILLTYPE] = SKJSONCANVAS_FILLTYPE_INVERSEEVENODD;
break;
}
Json::Value verbs(Json::arrayValue);
SkPath::Iter iter(path, false);
SkPoint pts[4];
SkPath::Verb verb;
while ((verb = iter.next(pts)) != SkPath::kDone_Verb) {
switch (verb) {
case SkPath::kLine_Verb: {
Json::Value line(Json::objectValue);
line[SKJSONCANVAS_VERB_LINE] = this->makePoint(pts[1]);
verbs.append(line);
break;
}
case SkPath::kQuad_Verb: {
Json::Value quad(Json::objectValue);
Json::Value coords(Json::arrayValue);
coords.append(this->makePoint(pts[1]));
coords.append(this->makePoint(pts[2]));
quad[SKJSONCANVAS_VERB_QUAD] = coords;
verbs.append(quad);
break;
}
case SkPath::kCubic_Verb: {
Json::Value cubic(Json::objectValue);
Json::Value coords(Json::arrayValue);
coords.append(this->makePoint(pts[1]));
coords.append(this->makePoint(pts[2]));
coords.append(this->makePoint(pts[3]));
cubic[SKJSONCANVAS_VERB_CUBIC] = coords;
verbs.append(cubic);
break;
}
case SkPath::kConic_Verb: {
Json::Value conic(Json::objectValue);
Json::Value coords(Json::arrayValue);
coords.append(this->makePoint(pts[1]));
coords.append(this->makePoint(pts[2]));
coords.append(Json::Value(iter.conicWeight()));
conic[SKJSONCANVAS_VERB_CONIC] = coords;
verbs.append(conic);
break;
}
case SkPath::kMove_Verb: {
Json::Value move(Json::objectValue);
move[SKJSONCANVAS_VERB_MOVE] = this->makePoint(pts[0]);
verbs.append(move);
break;
}
case SkPath::kClose_Verb:
verbs.append(Json::Value(SKJSONCANVAS_VERB_CLOSE));
break;
case SkPath::kDone_Verb:
break;
}
}
result[SKJSONCANVAS_ATTRIBUTE_VERBS] = verbs;
return result;
}
Json::Value SkJSONCanvas::makeRegion(const SkRegion& region) {
return Json::Value("<unimplemented>");
}
void store_scalar(Json::Value* target, const char* key, SkScalar value, SkScalar defaultValue) {
if (value != defaultValue) {
(*target)[key] = Json::Value(value);
}
}
void store_bool(Json::Value* target, const char* key, bool value, bool defaultValue) {
if (value != defaultValue) {
(*target)[key] = Json::Value(value);
}
}
Json::Value SkJSONCanvas::makePaint(const SkPaint& paint) {
Json::Value result(Json::objectValue);
SkColor color = paint.getColor();
if (color != SK_ColorBLACK) {
Json::Value colorValue(Json::arrayValue);
colorValue.append(Json::Value(SkColorGetA(color)));
colorValue.append(Json::Value(SkColorGetR(color)));
colorValue.append(Json::Value(SkColorGetG(color)));
colorValue.append(Json::Value(SkColorGetB(color)));
result[SKJSONCANVAS_ATTRIBUTE_COLOR] = colorValue;;
}
SkPaint::Style style = paint.getStyle();
if (style != SkPaint::kFill_Style) {
switch (style) {
case SkPaint::kStroke_Style: {
Json::Value stroke(SKJSONCANVAS_STYLE_STROKE);
result[SKJSONCANVAS_ATTRIBUTE_STYLE] = stroke;
break;
}
case SkPaint::kStrokeAndFill_Style: {
Json::Value strokeAndFill(SKJSONCANVAS_STYLE_STROKEANDFILL);
result[SKJSONCANVAS_ATTRIBUTE_STYLE] = strokeAndFill;
break;
}
default: SkASSERT(false);
}
}
store_scalar(&result, SKJSONCANVAS_ATTRIBUTE_STROKEWIDTH, paint.getStrokeWidth(), 0.0f);
store_bool(&result, SKJSONCANVAS_ATTRIBUTE_ANTIALIAS, paint.isAntiAlias(), false);
SkMaskFilter* maskFilter = paint.getMaskFilter();
if (maskFilter != nullptr) {
SkMaskFilter::BlurRec blurRec;
if (maskFilter->asABlur(&blurRec)) {
Json::Value blur(Json::objectValue);
blur[SKJSONCANVAS_ATTRIBUTE_SIGMA] = Json::Value(blurRec.fSigma);
switch (blurRec.fStyle) {
case SkBlurStyle::kNormal_SkBlurStyle:
blur[SKJSONCANVAS_ATTRIBUTE_STYLE] = Json::Value(SKJSONCANVAS_BLURSTYLE_NORMAL);
break;
case SkBlurStyle::kSolid_SkBlurStyle:
blur[SKJSONCANVAS_ATTRIBUTE_STYLE] = Json::Value(SKJSONCANVAS_BLURSTYLE_SOLID);
break;
case SkBlurStyle::kOuter_SkBlurStyle:
blur[SKJSONCANVAS_ATTRIBUTE_STYLE] = Json::Value(SKJSONCANVAS_BLURSTYLE_OUTER);
break;
case SkBlurStyle::kInner_SkBlurStyle:
blur[SKJSONCANVAS_ATTRIBUTE_STYLE] = Json::Value(SKJSONCANVAS_BLURSTYLE_INNER);
break;
default:
SkASSERT(false);
}
switch (blurRec.fQuality) {
case SkBlurQuality::kLow_SkBlurQuality:
blur[SKJSONCANVAS_ATTRIBUTE_QUALITY] = Json::Value(SKJSONCANVAS_BLURQUALITY_LOW);
break;
case SkBlurQuality::kHigh_SkBlurQuality:
blur[SKJSONCANVAS_ATTRIBUTE_QUALITY] = Json::Value(SKJSONCANVAS_BLURQUALITY_HIGH);
break;
default:
SkASSERT(false);
}
result[SKJSONCANVAS_ATTRIBUTE_BLUR] = blur;
}
else {
SkDebugf("unimplemented: non-blur maskfilter");
SkASSERT(false);
}
}
SkPathEffect* pathEffect = paint.getPathEffect();
if (pathEffect != nullptr) {
SkPathEffect::DashInfo dashInfo;
SkPathEffect::DashType dashType = pathEffect->asADash(&dashInfo);
if (dashType == SkPathEffect::kDash_DashType) {
dashInfo.fIntervals = (SkScalar*) sk_malloc_throw(dashInfo.fCount * sizeof(SkScalar));
pathEffect->asADash(&dashInfo);
Json::Value dashing(Json::objectValue);
Json::Value intervals(Json::arrayValue);
for (int32_t i = 0; i < dashInfo.fCount; i++) {
intervals.append(Json::Value(dashInfo.fIntervals[i]));
}
free(dashInfo.fIntervals);
dashing[SKJSONCANVAS_ATTRIBUTE_INTERVALS] = intervals;
dashing[SKJSONCANVAS_ATTRIBUTE_PHASE] = dashInfo.fPhase;
result[SKJSONCANVAS_ATTRIBUTE_DASHING] = dashing;
}
else {
SkDebugf("unimplemented: non-dash patheffect");
SkASSERT(false);
}
}
store_scalar(&result, SKJSONCANVAS_ATTRIBUTE_TEXTSIZE, paint.getTextSize(),
SkPaintDefaults_TextSize);
store_scalar(&result, SKJSONCANVAS_ATTRIBUTE_TEXTSCALEX, paint.getTextScaleX(), SK_Scalar1);
store_scalar(&result, SKJSONCANVAS_ATTRIBUTE_TEXTSCALEX, paint.getTextSkewX(), 0.0f);
SkPaint::Align textAlign = paint.getTextAlign();
if (textAlign != SkPaint::kLeft_Align) {
switch (textAlign) {
case SkPaint::kCenter_Align: {
result[SKJSONCANVAS_ATTRIBUTE_TEXTALIGN] = SKJSONCANVAS_ALIGN_CENTER;
break;
}
case SkPaint::kRight_Align: {
result[SKJSONCANVAS_ATTRIBUTE_TEXTALIGN] = SKJSONCANVAS_ALIGN_RIGHT;
break;
}
default: SkASSERT(false);
}
}
return result;
}
Json::Value SkJSONCanvas::makeMatrix(const SkMatrix& matrix) {
Json::Value result(Json::arrayValue);
Json::Value row1(Json::arrayValue);
row1.append(Json::Value(matrix[0]));
row1.append(Json::Value(matrix[1]));
row1.append(Json::Value(matrix[2]));
result.append(row1);
Json::Value row2(Json::arrayValue);
row2.append(Json::Value(matrix[3]));
row2.append(Json::Value(matrix[4]));
row2.append(Json::Value(matrix[5]));
result.append(row2);
Json::Value row3(Json::arrayValue);
row3.append(Json::Value(matrix[6]));
row3.append(Json::Value(matrix[7]));
row3.append(Json::Value(matrix[8]));
result.append(row3);
return result;
}
Json::Value SkJSONCanvas::makeRegionOp(SkRegion::Op op) {
switch (op) {
case SkRegion::kDifference_Op:
return Json::Value(SKJSONCANVAS_REGIONOP_DIFFERENCE);
case SkRegion::kIntersect_Op:
return Json::Value(SKJSONCANVAS_REGIONOP_INTERSECT);
case SkRegion::kUnion_Op:
return Json::Value(SKJSONCANVAS_REGIONOP_UNION);
case SkRegion::kXOR_Op:
return Json::Value(SKJSONCANVAS_REGIONOP_XOR);
case SkRegion::kReverseDifference_Op:
return Json::Value(SKJSONCANVAS_REGIONOP_REVERSE_DIFFERENCE);
case SkRegion::kReplace_Op:
return Json::Value(SKJSONCANVAS_REGIONOP_REPLACE);
default:
SkASSERT(false);
return Json::Value("<invalid region op>");
};
}
Json::Value SkJSONCanvas::makePointMode(SkCanvas::PointMode mode) {
switch (mode) {
case SkCanvas::kPoints_PointMode:
return Json::Value(SKJSONCANVAS_POINTMODE_POINTS);
case SkCanvas::kLines_PointMode:
return Json::Value(SKJSONCANVAS_POINTMODE_LINES);
case SkCanvas::kPolygon_PointMode:
return Json::Value(SKJSONCANVAS_POINTMODE_POLYGON);
default:
SkASSERT(false);
return Json::Value("<invalid point mode>");
};
}
void SkJSONCanvas::updateMatrix() {
const SkMatrix& matrix = this->getTotalMatrix();
if (matrix != fLastMatrix) {
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_MATRIX);
command[SKJSONCANVAS_ATTRIBUTE_MATRIX] = this->makeMatrix(matrix);
fCommands.append(command);
fLastMatrix = matrix;
}
}
void SkJSONCanvas::onDrawPaint(const SkPaint& paint) {
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_PAINT);
command[SKJSONCANVAS_ATTRIBUTE_PAINT] = this->makePaint(paint);
fCommands.append(command);
}
void SkJSONCanvas::onDrawRect(const SkRect& rect, const SkPaint& paint) {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_RECT);
command[SKJSONCANVAS_ATTRIBUTE_COORDS] = this->makeRect(rect);
command[SKJSONCANVAS_ATTRIBUTE_PAINT] = this->makePaint(paint);
fCommands.append(command);
}
void SkJSONCanvas::onDrawOval(const SkRect& rect, const SkPaint& paint) {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_OVAL);
command[SKJSONCANVAS_ATTRIBUTE_COORDS] = this->makeRect(rect);
command[SKJSONCANVAS_ATTRIBUTE_PAINT] = this->makePaint(paint);
fCommands.append(command);
}
void SkJSONCanvas::onDrawRRect(const SkRRect& rrect, const SkPaint& paint) {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_RRECT);
command[SKJSONCANVAS_ATTRIBUTE_COORDS] = this->makeRRect(rrect);
command[SKJSONCANVAS_ATTRIBUTE_PAINT] = this->makePaint(paint);
fCommands.append(command);
}
void SkJSONCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint) {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_RRECT);
command[SKJSONCANVAS_ATTRIBUTE_INNER] = this->makeRRect(inner);
command[SKJSONCANVAS_ATTRIBUTE_OUTER] = this->makeRRect(outer);
command[SKJSONCANVAS_ATTRIBUTE_PAINT] = this->makePaint(paint);
fCommands.append(command);
}
void SkJSONCanvas::onDrawPoints(SkCanvas::PointMode mode, size_t count, const SkPoint pts[],
const SkPaint& paint) {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_POINTS);
command[SKJSONCANVAS_ATTRIBUTE_MODE] = this->makePointMode(mode);
Json::Value points(Json::arrayValue);
for (size_t i = 0; i < count; i++) {
points.append(this->makePoint(pts[i]));
}
command[SKJSONCANVAS_ATTRIBUTE_POINTS] = points;
command[SKJSONCANVAS_ATTRIBUTE_PAINT] = this->makePaint(paint);
fCommands.append(command);
}
void SkJSONCanvas::onDrawVertices(SkCanvas::VertexMode, int vertexCount, const SkPoint vertices[],
const SkPoint texs[], const SkColor colors[], SkXfermode*,
const uint16_t indices[], int indexCount, const SkPaint&) {
SkDebugf("unsupported: drawVertices\n");
}
void SkJSONCanvas::onDrawAtlas(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[],
int count, SkXfermode::Mode, const SkRect* cull, const SkPaint*) {
SkDebugf("unsupported: drawAtlas\n");
}
void SkJSONCanvas::onDrawPath(const SkPath& path, const SkPaint& paint) {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_PATH);
command[SKJSONCANVAS_ATTRIBUTE_PATH] = this->makePath(path);
command[SKJSONCANVAS_ATTRIBUTE_PAINT] = this->makePaint(paint);
fCommands.append(command);
}
void SkJSONCanvas::onDrawImage(const SkImage*, SkScalar dx, SkScalar dy, const SkPaint*) {
SkDebugf("unsupported: drawImage\n");
}
void SkJSONCanvas::onDrawImageRect(const SkImage*, const SkRect*, const SkRect&, const SkPaint*,
SkCanvas::SrcRectConstraint) {
SkDebugf("unsupported: drawImageRect\n");
}
void SkJSONCanvas::onDrawImageNine(const SkImage*, const SkIRect& center, const SkRect& dst,
const SkPaint*) {
SkDebugf("unsupported: drawImageNine\n");
}
void SkJSONCanvas::onDrawBitmap(const SkBitmap&, SkScalar dx, SkScalar dy, const SkPaint*) {
SkDebugf("unsupported: drawBitmap\n");
}
void SkJSONCanvas::onDrawBitmapRect(const SkBitmap&, const SkRect*, const SkRect&, const SkPaint*,
SkCanvas::SrcRectConstraint) {
SkDebugf("unsupported: drawBitmapRect\n");
}
void SkJSONCanvas::onDrawBitmapNine(const SkBitmap&, const SkIRect& center, const SkRect& dst,
const SkPaint*) {
SkDebugf("unsupported: drawBitmapNine\n");
}
void SkJSONCanvas::onDrawText(const void* text, size_t byteLength, SkScalar x,
SkScalar y, const SkPaint& paint) {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_TEXT);
command[SKJSONCANVAS_ATTRIBUTE_TEXT] = Json::Value((const char*) text,
((const char*) text) + byteLength);
command[SKJSONCANVAS_ATTRIBUTE_COORDS] = this->makePoint(x, y);
command[SKJSONCANVAS_ATTRIBUTE_PAINT] = this->makePaint(paint);
fCommands.append(command);
}
void SkJSONCanvas::onDrawPosText(const void* text, size_t byteLength,
const SkPoint pos[], const SkPaint& paint) {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_POSTEXT);
command[SKJSONCANVAS_ATTRIBUTE_TEXT] = Json::Value((const char*) text,
((const char*) text) + byteLength);
Json::Value coords(Json::arrayValue);
for (size_t i = 0; i < byteLength; i++) {
coords.append(this->makePoint(pos[i]));
}
command[SKJSONCANVAS_ATTRIBUTE_COORDS] = coords;
command[SKJSONCANVAS_ATTRIBUTE_PAINT] = this->makePaint(paint);
fCommands.append(command);
}
void SkJSONCanvas::onDrawPosTextH(const void* text, size_t byteLength,
const SkScalar xpos[], SkScalar constY,
const SkPaint& paint) {
SkDebugf("unsupported: drawPosTextH\n");
}
void SkJSONCanvas::onDrawTextOnPath(const void* text, size_t byteLength,
const SkPath& path, const SkMatrix* matrix,
const SkPaint& paint) {
SkDebugf("unsupported: drawTextOnPath\n");
}
void SkJSONCanvas::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
const SkPaint& paint) {
SkDebugf("unsupported: drawTextBlob\n");
}
void SkJSONCanvas::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
const SkPoint texCoords[4], SkXfermode* xmode,
const SkPaint& paint) {
SkDebugf("unsupported: drawPatch\n");
}
void SkJSONCanvas::onDrawDrawable(SkDrawable*, const SkMatrix*) {
SkDebugf("unsupported: drawDrawable\n");
}
void SkJSONCanvas::onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_CLIPRECT);
command[SKJSONCANVAS_ATTRIBUTE_COORDS] = this->makeRect(rect);
command[SKJSONCANVAS_ATTRIBUTE_REGIONOP] = this->makeRegionOp(op);
command[SKJSONCANVAS_ATTRIBUTE_ANTIALIAS] = (edgeStyle == SkCanvas::kSoft_ClipEdgeStyle);
fCommands.append(command);
}
void SkJSONCanvas::onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_CLIPRRECT);
command[SKJSONCANVAS_ATTRIBUTE_COORDS] = this->makeRRect(rrect);
command[SKJSONCANVAS_ATTRIBUTE_REGIONOP] = this->makeRegionOp(op);
command[SKJSONCANVAS_ATTRIBUTE_ANTIALIAS] = (edgeStyle == SkCanvas::kSoft_ClipEdgeStyle);
fCommands.append(command);
}
void SkJSONCanvas::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_CLIPPATH);
command[SKJSONCANVAS_ATTRIBUTE_PATH] = this->makePath(path);
command[SKJSONCANVAS_ATTRIBUTE_REGIONOP] = this->makeRegionOp(op);
command[SKJSONCANVAS_ATTRIBUTE_ANTIALIAS] = (edgeStyle == SkCanvas::kSoft_ClipEdgeStyle);
fCommands.append(command);
}
void SkJSONCanvas::onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_CLIPREGION);
command[SKJSONCANVAS_ATTRIBUTE_REGION] = this->makeRegion(deviceRgn);
command[SKJSONCANVAS_ATTRIBUTE_REGIONOP] = this->makeRegionOp(op);
fCommands.append(command);
}
void SkJSONCanvas::willSave() {
this->updateMatrix();
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_SAVE);
fCommands.append(command);
}
void SkJSONCanvas::willRestore() {
Json::Value command(Json::objectValue);
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_RESTORE);
fCommands.append(command);
}