| /* |
| * 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 "SkJSONRenderer.h" |
| |
| #include "SkBlurMaskFilter.h" |
| #include "SkDashPathEffect.h" |
| #include "SkJSONCanvas.h" |
| #include "SkJSONCPP.h" |
| #include "SkPath.h" |
| |
| namespace SkJSONRenderer { |
| |
| class Renderer { |
| public: |
| void getPaint(Json::Value& command, SkPaint* paint); |
| |
| void getRect(Json::Value& command, const char* name, SkRect* rect); |
| |
| void getRRect(Json::Value& command, const char* name, SkRRect* rrect); |
| |
| void getPath(Json::Value& command, SkPath* path); |
| |
| SkRegion::Op getRegionOp(Json::Value& command); |
| |
| void processCommand(Json::Value& command, SkCanvas* target); |
| |
| void processMatrix(Json::Value& command, SkCanvas* target); |
| |
| void processSave(Json::Value& command, SkCanvas* target); |
| |
| void processRestore(Json::Value& command, SkCanvas* target); |
| |
| void processPaint(Json::Value& command, SkCanvas* target); |
| |
| void processRect(Json::Value& command, SkCanvas* target); |
| |
| void processRRect(Json::Value& command, SkCanvas* target); |
| |
| void processOval(Json::Value& command, SkCanvas* target); |
| |
| void processPath(Json::Value& command, SkCanvas* target); |
| |
| void processText(Json::Value& command, SkCanvas* target); |
| |
| void processPosText(Json::Value& command, SkCanvas* target); |
| |
| void processPoints(Json::Value& command, SkCanvas* target); |
| |
| void processClipRect(Json::Value& command, SkCanvas* target); |
| |
| void processClipRRect(Json::Value& command, SkCanvas* target); |
| |
| void processClipPath(Json::Value& command, SkCanvas* target); |
| }; |
| |
| void Renderer::processCommand(Json::Value& command, SkCanvas* target) { |
| const char* name = command[SKJSONCANVAS_COMMAND].asCString(); |
| // TODO speed this up with a hash |
| if (!strcmp(name, SKJSONCANVAS_COMMAND_MATRIX)) { |
| this->processMatrix(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_SAVE)) { |
| this->processSave(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_RESTORE)) { |
| this->processRestore(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_PAINT)) { |
| this->processPaint(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_RECT)) { |
| this->processRect(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_RRECT)) { |
| this->processRRect(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_OVAL)) { |
| this->processOval(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_PATH)) { |
| this->processPath(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_TEXT)) { |
| this->processText(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_POSTEXT)) { |
| this->processPosText(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_POINTS)) { |
| this->processPoints(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_CLIPRECT)) { |
| this->processClipRect(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_CLIPRRECT)) { |
| this->processClipRRect(command, target); |
| } |
| else if (!strcmp(name, SKJSONCANVAS_COMMAND_CLIPPATH)) { |
| this->processClipPath(command, target); |
| } |
| else { |
| SkDebugf("unsupported JSON command: %s\n", name); |
| } |
| } |
| |
| void Renderer::getPaint(Json::Value& command, SkPaint* result) { |
| Json::Value jsonPaint = command[SKJSONCANVAS_ATTRIBUTE_PAINT]; |
| if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_COLOR)) { |
| Json::Value color = jsonPaint[SKJSONCANVAS_ATTRIBUTE_COLOR]; |
| result->setColor(SkColorSetARGB(color[0].asInt(), color[1].asInt(), color[2].asInt(), |
| color[3].asInt())); |
| } |
| if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_STYLE)) { |
| const char* style = jsonPaint[SKJSONCANVAS_ATTRIBUTE_STYLE].asCString(); |
| if (!strcmp(style, SKJSONCANVAS_STYLE_FILL)) { |
| result->setStyle(SkPaint::kFill_Style); |
| } |
| else if (!strcmp(style, SKJSONCANVAS_STYLE_STROKE)) { |
| result->setStyle(SkPaint::kStroke_Style); |
| } |
| else if (!strcmp(style, SKJSONCANVAS_STYLE_STROKEANDFILL)) { |
| result->setStyle(SkPaint::kStrokeAndFill_Style); |
| } |
| } |
| if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_STROKEWIDTH)) { |
| float strokeWidth = jsonPaint[SKJSONCANVAS_ATTRIBUTE_STROKEWIDTH].asFloat(); |
| result->setStrokeWidth(strokeWidth); |
| } |
| if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_ANTIALIAS)) { |
| result->setAntiAlias(jsonPaint[SKJSONCANVAS_ATTRIBUTE_ANTIALIAS].asBool()); |
| } |
| if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_BLUR)) { |
| Json::Value blur = jsonPaint[SKJSONCANVAS_ATTRIBUTE_BLUR]; |
| SkScalar sigma = blur[SKJSONCANVAS_ATTRIBUTE_SIGMA].asFloat(); |
| SkBlurStyle style; |
| const char* jsonStyle = blur[SKJSONCANVAS_ATTRIBUTE_STYLE].asCString(); |
| if (!strcmp(jsonStyle, SKJSONCANVAS_BLURSTYLE_NORMAL)) { |
| style = SkBlurStyle::kNormal_SkBlurStyle; |
| } |
| else if (!strcmp(jsonStyle, SKJSONCANVAS_BLURSTYLE_SOLID)) { |
| style = SkBlurStyle::kSolid_SkBlurStyle; |
| } |
| else if (!strcmp(jsonStyle, SKJSONCANVAS_BLURSTYLE_OUTER)) { |
| style = SkBlurStyle::kOuter_SkBlurStyle; |
| } |
| else if (!strcmp(jsonStyle, SKJSONCANVAS_BLURSTYLE_INNER)) { |
| style = SkBlurStyle::kInner_SkBlurStyle; |
| } |
| else { |
| SkASSERT(false); |
| style = SkBlurStyle::kNormal_SkBlurStyle; |
| } |
| SkBlurMaskFilter::BlurFlags flags; |
| const char* jsonQuality = blur[SKJSONCANVAS_ATTRIBUTE_QUALITY].asCString(); |
| if (!strcmp(jsonQuality, SKJSONCANVAS_BLURQUALITY_LOW)) { |
| flags = SkBlurMaskFilter::BlurFlags::kNone_BlurFlag; |
| } |
| else if (!strcmp(jsonQuality, SKJSONCANVAS_BLURQUALITY_HIGH)) { |
| flags = SkBlurMaskFilter::BlurFlags::kHighQuality_BlurFlag; |
| } |
| else { |
| SkASSERT(false); |
| flags = SkBlurMaskFilter::BlurFlags::kNone_BlurFlag; |
| } |
| result->setMaskFilter(SkBlurMaskFilter::Create(style, sigma, flags)); |
| } |
| if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_DASHING)) { |
| Json::Value dash = jsonPaint[SKJSONCANVAS_ATTRIBUTE_DASHING]; |
| Json::Value jsonIntervals = dash[SKJSONCANVAS_ATTRIBUTE_INTERVALS]; |
| Json::ArrayIndex count = jsonIntervals.size(); |
| SkScalar* intervals = (SkScalar*) sk_malloc_throw(count * sizeof(SkScalar)); |
| for (Json::ArrayIndex i = 0; i < count; i++) { |
| intervals[i] = jsonIntervals[i].asFloat(); |
| } |
| SkScalar phase = dash[SKJSONCANVAS_ATTRIBUTE_PHASE].asFloat(); |
| result->setPathEffect(SkDashPathEffect::Create(intervals, count, phase)); |
| free(intervals); |
| } |
| if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_TEXTALIGN)) { |
| SkPaint::Align textAlign; |
| const char* jsonAlign = jsonPaint[SKJSONCANVAS_ATTRIBUTE_TEXTALIGN].asCString(); |
| if (!strcmp(jsonAlign, SKJSONCANVAS_ALIGN_LEFT)) { |
| textAlign = SkPaint::kLeft_Align; |
| } |
| else if (!strcmp(jsonAlign, SKJSONCANVAS_ALIGN_CENTER)) { |
| textAlign = SkPaint::kCenter_Align; |
| } |
| else if (!strcmp(jsonAlign, SKJSONCANVAS_ALIGN_RIGHT)) { |
| textAlign = SkPaint::kRight_Align; |
| } |
| else { |
| SkASSERT(false); |
| textAlign = SkPaint::kLeft_Align; |
| } |
| result->setTextAlign(textAlign); |
| } |
| if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_TEXTSIZE)) { |
| float textSize = jsonPaint[SKJSONCANVAS_ATTRIBUTE_TEXTSIZE].asFloat(); |
| result->setTextSize(textSize); |
| } |
| if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_TEXTSCALEX)) { |
| float textScaleX = jsonPaint[SKJSONCANVAS_ATTRIBUTE_TEXTSCALEX].asFloat(); |
| result->setTextScaleX(textScaleX); |
| } |
| if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_TEXTSKEWX)) { |
| float textSkewX = jsonPaint[SKJSONCANVAS_ATTRIBUTE_TEXTSKEWX].asFloat(); |
| result->setTextSkewX(textSkewX); |
| } |
| } |
| |
| void Renderer::getRect(Json::Value& command, const char* name, SkRect* result) { |
| Json::Value rect = command[name]; |
| result->set(rect[0].asFloat(), rect[1].asFloat(), rect[2].asFloat(), rect[3].asFloat()); |
| } |
| |
| void Renderer::getRRect(Json::Value& command, const char* name, SkRRect* result) { |
| Json::Value rrect = command[name]; |
| SkVector radii[4] = { |
| { rrect[1][0].asFloat(), rrect[1][1].asFloat() }, |
| { rrect[2][0].asFloat(), rrect[2][1].asFloat() }, |
| { rrect[3][0].asFloat(), rrect[3][1].asFloat() }, |
| { rrect[4][0].asFloat(), rrect[4][1].asFloat() } |
| }; |
| result->setRectRadii(SkRect::MakeLTRB(rrect[0][0].asFloat(), rrect[0][1].asFloat(), |
| rrect[0][2].asFloat(), rrect[0][3].asFloat()), |
| radii); |
| } |
| |
| void Renderer::getPath(Json::Value& command, SkPath* result) { |
| Json::Value path = command[SKJSONCANVAS_ATTRIBUTE_PATH]; |
| const char* fillType = path[SKJSONCANVAS_ATTRIBUTE_FILLTYPE].asCString(); |
| if (!strcmp(fillType, SKJSONCANVAS_FILLTYPE_WINDING)) { |
| result->setFillType(SkPath::kWinding_FillType); |
| } |
| else if (!strcmp(fillType, SKJSONCANVAS_FILLTYPE_EVENODD)) { |
| result->setFillType(SkPath::kEvenOdd_FillType); |
| } |
| else if (!strcmp(fillType, SKJSONCANVAS_FILLTYPE_INVERSEWINDING)) { |
| result->setFillType(SkPath::kInverseWinding_FillType); |
| } |
| else if (!strcmp(fillType, SKJSONCANVAS_FILLTYPE_INVERSEEVENODD)) { |
| result->setFillType(SkPath::kInverseEvenOdd_FillType); |
| } |
| Json::Value verbs = path[SKJSONCANVAS_ATTRIBUTE_VERBS]; |
| for (Json::ArrayIndex i = 0; i < verbs.size(); i++) { |
| Json::Value verb = verbs[i]; |
| if (verb.isString()) { |
| SkASSERT(!strcmp(verb.asCString(), SKJSONCANVAS_VERB_CLOSE)); |
| result->close(); |
| } |
| else { |
| if (verb.isMember(SKJSONCANVAS_VERB_MOVE)) { |
| Json::Value move = verb[SKJSONCANVAS_VERB_MOVE]; |
| result->moveTo(move[0].asFloat(), move[1].asFloat()); |
| } |
| else if (verb.isMember(SKJSONCANVAS_VERB_LINE)) { |
| Json::Value line = verb[SKJSONCANVAS_VERB_LINE]; |
| result->lineTo(line[0].asFloat(), line[1].asFloat()); |
| } |
| else if (verb.isMember(SKJSONCANVAS_VERB_QUAD)) { |
| Json::Value quad = verb[SKJSONCANVAS_VERB_QUAD]; |
| result->quadTo(quad[0][0].asFloat(), quad[0][1].asFloat(), |
| quad[1][0].asFloat(), quad[1][1].asFloat()); |
| } |
| else if (verb.isMember(SKJSONCANVAS_VERB_CUBIC)) { |
| Json::Value cubic = verb[SKJSONCANVAS_VERB_CUBIC]; |
| result->cubicTo(cubic[0][0].asFloat(), cubic[0][1].asFloat(), |
| cubic[1][0].asFloat(), cubic[1][1].asFloat(), |
| cubic[2][0].asFloat(), cubic[2][1].asFloat()); |
| } |
| else if (verb.isMember(SKJSONCANVAS_VERB_CONIC)) { |
| Json::Value conic = verb[SKJSONCANVAS_VERB_CONIC]; |
| result->conicTo(conic[0][0].asFloat(), conic[0][1].asFloat(), |
| conic[1][0].asFloat(), conic[1][1].asFloat(), |
| conic[2].asFloat()); |
| } |
| else { |
| SkASSERT(false); |
| } |
| } |
| } |
| } |
| |
| SkRegion::Op Renderer::getRegionOp(Json::Value& command) { |
| const char* op = command[SKJSONCANVAS_ATTRIBUTE_REGIONOP].asCString(); |
| if (!strcmp(op, SKJSONCANVAS_REGIONOP_DIFFERENCE)) { |
| return SkRegion::kDifference_Op; |
| } |
| else if (!strcmp(op, SKJSONCANVAS_REGIONOP_INTERSECT)) { |
| return SkRegion::kIntersect_Op; |
| } |
| else if (!strcmp(op, SKJSONCANVAS_REGIONOP_UNION)) { |
| return SkRegion::kUnion_Op; |
| } |
| else if (!strcmp(op, SKJSONCANVAS_REGIONOP_XOR)) { |
| return SkRegion::kXOR_Op; |
| } |
| else if (!strcmp(op, SKJSONCANVAS_REGIONOP_REVERSE_DIFFERENCE)) { |
| return SkRegion::kReverseDifference_Op; |
| } |
| else if (!strcmp(op, SKJSONCANVAS_REGIONOP_REPLACE)) { |
| return SkRegion::kReplace_Op; |
| } |
| SkASSERT(false); |
| return SkRegion::kIntersect_Op; |
| } |
| |
| void Renderer::processMatrix(Json::Value& command, SkCanvas* target) { |
| Json::Value jsonMatrix = command[SKJSONCANVAS_ATTRIBUTE_MATRIX]; |
| SkMatrix matrix; |
| SkScalar values[] = { |
| jsonMatrix[0][0].asFloat(), jsonMatrix[0][1].asFloat(), jsonMatrix[0][2].asFloat(), |
| jsonMatrix[1][0].asFloat(), jsonMatrix[1][1].asFloat(), jsonMatrix[1][2].asFloat(), |
| jsonMatrix[2][0].asFloat(), jsonMatrix[2][1].asFloat(), jsonMatrix[2][2].asFloat() |
| }; |
| matrix.set9(values); |
| target->setMatrix(matrix); |
| } |
| |
| void Renderer::processSave(Json::Value& command, SkCanvas* target) { |
| target->save(); |
| } |
| |
| void Renderer::processRestore(Json::Value& command, SkCanvas* target) { |
| target->restore(); |
| } |
| |
| void Renderer::processPaint(Json::Value& command, SkCanvas* target) { |
| SkPaint paint; |
| this->getPaint(command, &paint); |
| target->drawPaint(paint); |
| } |
| |
| void Renderer::processRect(Json::Value& command, SkCanvas* target) { |
| SkRect rect; |
| this->getRect(command, SKJSONCANVAS_ATTRIBUTE_COORDS, &rect); |
| SkPaint paint; |
| this->getPaint(command, &paint); |
| target->drawRect(rect, paint); |
| } |
| |
| void Renderer::processRRect(Json::Value& command, SkCanvas* target) { |
| SkRRect rrect; |
| this->getRRect(command, SKJSONCANVAS_ATTRIBUTE_COORDS, &rrect); |
| SkPaint paint; |
| this->getPaint(command, &paint); |
| target->drawRRect(rrect, paint); |
| } |
| |
| void Renderer::processOval(Json::Value& command, SkCanvas* target) { |
| SkRect rect; |
| this->getRect(command, SKJSONCANVAS_ATTRIBUTE_COORDS, &rect); |
| SkPaint paint; |
| this->getPaint(command, &paint); |
| target->drawOval(rect, paint); |
| } |
| |
| void Renderer::processPath(Json::Value& command, SkCanvas* target) { |
| Json::Value jsonPath = command[SKJSONCANVAS_ATTRIBUTE_PATH]; |
| SkPath path; |
| this->getPath(command, &path); |
| SkPaint paint; |
| this->getPaint(command, &paint); |
| target->drawPath(path, paint); |
| } |
| |
| void Renderer::processText(Json::Value& command, SkCanvas* target) { |
| const char* text = command[SKJSONCANVAS_ATTRIBUTE_TEXT].asCString(); |
| SkPaint paint; |
| this->getPaint(command, &paint); |
| Json::Value coords = command[SKJSONCANVAS_ATTRIBUTE_COORDS]; |
| target->drawText(text, strlen(text), coords[0].asFloat(), coords[1].asFloat(), paint); |
| } |
| |
| void Renderer::processPosText(Json::Value& command, SkCanvas* target) { |
| const char* text = command[SKJSONCANVAS_ATTRIBUTE_TEXT].asCString(); |
| SkPaint paint; |
| this->getPaint(command, &paint); |
| Json::Value coords = command[SKJSONCANVAS_ATTRIBUTE_COORDS]; |
| int count = (int) coords.size(); |
| SkPoint* points = (SkPoint*) sk_malloc_throw(count * sizeof(SkPoint)); |
| for (int i = 0; i < count; i++) { |
| points[i] = SkPoint::Make(coords[i][0].asFloat(), coords[i][1].asFloat()); |
| } |
| target->drawPosText(text, strlen(text), points, paint); |
| free(points); |
| } |
| |
| void Renderer::processPoints(Json::Value& command, SkCanvas* target) { |
| SkCanvas::PointMode mode; |
| const char* jsonMode = command[SKJSONCANVAS_ATTRIBUTE_MODE].asCString(); |
| if (!strcmp(jsonMode, SKJSONCANVAS_POINTMODE_POINTS)) { |
| mode = SkCanvas::kPoints_PointMode; |
| } |
| else if (!strcmp(jsonMode, SKJSONCANVAS_POINTMODE_LINES)) { |
| mode = SkCanvas::kLines_PointMode; |
| } |
| else if (!strcmp(jsonMode, SKJSONCANVAS_POINTMODE_POLYGON)) { |
| mode = SkCanvas::kPolygon_PointMode; |
| } |
| else { |
| SkASSERT(false); |
| return; |
| } |
| Json::Value jsonPoints = command[SKJSONCANVAS_ATTRIBUTE_POINTS]; |
| int count = (int) jsonPoints.size(); |
| SkPoint* points = (SkPoint*) sk_malloc_throw(count * sizeof(SkPoint)); |
| for (int i = 0; i < count; i++) { |
| points[i] = SkPoint::Make(jsonPoints[i][0].asFloat(), jsonPoints[i][1].asFloat()); |
| } |
| SkPaint paint; |
| this->getPaint(command, &paint); |
| target->drawPoints(mode, count, points, paint); |
| free(points); |
| } |
| |
| void Renderer::processClipRect(Json::Value& command, SkCanvas* target) { |
| SkRect rect; |
| this->getRect(command, SKJSONCANVAS_ATTRIBUTE_COORDS, &rect); |
| target->clipRect(rect, this->getRegionOp(command), |
| command[SKJSONCANVAS_ATTRIBUTE_ANTIALIAS].asBool()); |
| } |
| |
| void Renderer::processClipRRect(Json::Value& command, SkCanvas* target) { |
| SkRRect rrect; |
| this->getRRect(command, SKJSONCANVAS_ATTRIBUTE_COORDS, &rrect); |
| target->clipRRect(rrect, this->getRegionOp(command), |
| command[SKJSONCANVAS_ATTRIBUTE_ANTIALIAS].asBool()); |
| } |
| |
| void Renderer::processClipPath(Json::Value& command, SkCanvas* target) { |
| SkPath path; |
| this->getPath(command, &path); |
| target->clipPath(path, this->getRegionOp(command), |
| command[SKJSONCANVAS_ATTRIBUTE_ANTIALIAS].asBool()); |
| } |
| |
| void render(const char* json, SkCanvas* target) { |
| Renderer renderer; |
| Json::Reader reader; |
| Json::Value root; |
| if (reader.parse(std::string(json), root)) { |
| SkASSERT(root[SKJSONCANVAS_VERSION].asInt() == 1); |
| Json::Value commands = root[SKJSONCANVAS_COMMANDS]; |
| for (Json::ArrayIndex i = 0; i < commands.size(); i++) { |
| renderer.processCommand(commands[i], target); |
| } |
| } |
| else { |
| SkDebugf(json); |
| SkFAIL("json parse failure"); |
| } |
| } |
| |
| } // namespace |