c05f7c3d57
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1651443002 TBR=jcgregorio@google.com Review URL: https://codereview.chromium.org/1651443002
461 lines
17 KiB
C++
461 lines
17 KiB
C++
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkJSONRenderer.h"
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#include "SkBlurMaskFilter.h"
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#include "SkDashPathEffect.h"
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#include "SkJSONCanvas.h"
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#include "SkJSONCPP.h"
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#include "SkPath.h"
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namespace SkJSONRenderer {
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class Renderer {
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public:
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void getPaint(Json::Value& command, SkPaint* paint);
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void getRect(Json::Value& command, const char* name, SkRect* rect);
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void getRRect(Json::Value& command, const char* name, SkRRect* rrect);
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void getPath(Json::Value& command, SkPath* path);
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SkRegion::Op getRegionOp(Json::Value& command);
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void processCommand(Json::Value& command, SkCanvas* target);
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void processMatrix(Json::Value& command, SkCanvas* target);
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void processSave(Json::Value& command, SkCanvas* target);
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void processRestore(Json::Value& command, SkCanvas* target);
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void processPaint(Json::Value& command, SkCanvas* target);
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void processRect(Json::Value& command, SkCanvas* target);
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void processRRect(Json::Value& command, SkCanvas* target);
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void processOval(Json::Value& command, SkCanvas* target);
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void processPath(Json::Value& command, SkCanvas* target);
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void processText(Json::Value& command, SkCanvas* target);
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void processPosText(Json::Value& command, SkCanvas* target);
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void processPoints(Json::Value& command, SkCanvas* target);
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void processClipRect(Json::Value& command, SkCanvas* target);
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void processClipRRect(Json::Value& command, SkCanvas* target);
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void processClipPath(Json::Value& command, SkCanvas* target);
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};
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void Renderer::processCommand(Json::Value& command, SkCanvas* target) {
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const char* name = command[SKJSONCANVAS_COMMAND].asCString();
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// TODO speed this up with a hash
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if (!strcmp(name, SKJSONCANVAS_COMMAND_MATRIX)) {
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this->processMatrix(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_SAVE)) {
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this->processSave(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_RESTORE)) {
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this->processRestore(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_PAINT)) {
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this->processPaint(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_RECT)) {
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this->processRect(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_RRECT)) {
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this->processRRect(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_OVAL)) {
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this->processOval(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_PATH)) {
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this->processPath(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_TEXT)) {
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this->processText(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_POSTEXT)) {
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this->processPosText(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_POINTS)) {
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this->processPoints(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_CLIPRECT)) {
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this->processClipRect(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_CLIPRRECT)) {
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this->processClipRRect(command, target);
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}
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else if (!strcmp(name, SKJSONCANVAS_COMMAND_CLIPPATH)) {
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this->processClipPath(command, target);
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}
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else {
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SkDebugf("unsupported JSON command: %s\n", name);
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}
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}
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void Renderer::getPaint(Json::Value& command, SkPaint* result) {
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Json::Value jsonPaint = command[SKJSONCANVAS_ATTRIBUTE_PAINT];
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if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_COLOR)) {
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Json::Value color = jsonPaint[SKJSONCANVAS_ATTRIBUTE_COLOR];
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result->setColor(SkColorSetARGB(color[0].asInt(), color[1].asInt(), color[2].asInt(),
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color[3].asInt()));
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}
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if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_STYLE)) {
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const char* style = jsonPaint[SKJSONCANVAS_ATTRIBUTE_STYLE].asCString();
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if (!strcmp(style, SKJSONCANVAS_STYLE_FILL)) {
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result->setStyle(SkPaint::kFill_Style);
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}
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else if (!strcmp(style, SKJSONCANVAS_STYLE_STROKE)) {
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result->setStyle(SkPaint::kStroke_Style);
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}
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else if (!strcmp(style, SKJSONCANVAS_STYLE_STROKEANDFILL)) {
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result->setStyle(SkPaint::kStrokeAndFill_Style);
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}
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}
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if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_STROKEWIDTH)) {
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float strokeWidth = jsonPaint[SKJSONCANVAS_ATTRIBUTE_STROKEWIDTH].asFloat();
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result->setStrokeWidth(strokeWidth);
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}
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if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_ANTIALIAS)) {
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result->setAntiAlias(jsonPaint[SKJSONCANVAS_ATTRIBUTE_ANTIALIAS].asBool());
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}
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if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_BLUR)) {
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Json::Value blur = jsonPaint[SKJSONCANVAS_ATTRIBUTE_BLUR];
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SkScalar sigma = blur[SKJSONCANVAS_ATTRIBUTE_SIGMA].asFloat();
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SkBlurStyle style;
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const char* jsonStyle = blur[SKJSONCANVAS_ATTRIBUTE_STYLE].asCString();
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if (!strcmp(jsonStyle, SKJSONCANVAS_BLURSTYLE_NORMAL)) {
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style = SkBlurStyle::kNormal_SkBlurStyle;
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}
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else if (!strcmp(jsonStyle, SKJSONCANVAS_BLURSTYLE_SOLID)) {
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style = SkBlurStyle::kSolid_SkBlurStyle;
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}
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else if (!strcmp(jsonStyle, SKJSONCANVAS_BLURSTYLE_OUTER)) {
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style = SkBlurStyle::kOuter_SkBlurStyle;
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}
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else if (!strcmp(jsonStyle, SKJSONCANVAS_BLURSTYLE_INNER)) {
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style = SkBlurStyle::kInner_SkBlurStyle;
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}
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else {
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SkASSERT(false);
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style = SkBlurStyle::kNormal_SkBlurStyle;
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}
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SkBlurMaskFilter::BlurFlags flags;
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const char* jsonQuality = blur[SKJSONCANVAS_ATTRIBUTE_QUALITY].asCString();
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if (!strcmp(jsonQuality, SKJSONCANVAS_BLURQUALITY_LOW)) {
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flags = SkBlurMaskFilter::BlurFlags::kNone_BlurFlag;
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}
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else if (!strcmp(jsonQuality, SKJSONCANVAS_BLURQUALITY_HIGH)) {
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flags = SkBlurMaskFilter::BlurFlags::kHighQuality_BlurFlag;
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}
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else {
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SkASSERT(false);
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flags = SkBlurMaskFilter::BlurFlags::kNone_BlurFlag;
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}
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result->setMaskFilter(SkBlurMaskFilter::Create(style, sigma, flags));
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}
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if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_DASHING)) {
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Json::Value dash = jsonPaint[SKJSONCANVAS_ATTRIBUTE_DASHING];
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Json::Value jsonIntervals = dash[SKJSONCANVAS_ATTRIBUTE_INTERVALS];
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Json::ArrayIndex count = jsonIntervals.size();
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SkScalar* intervals = (SkScalar*) sk_malloc_throw(count * sizeof(SkScalar));
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for (Json::ArrayIndex i = 0; i < count; i++) {
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intervals[i] = jsonIntervals[i].asFloat();
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}
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SkScalar phase = dash[SKJSONCANVAS_ATTRIBUTE_PHASE].asFloat();
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result->setPathEffect(SkDashPathEffect::Create(intervals, count, phase));
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free(intervals);
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}
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if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_TEXTALIGN)) {
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SkPaint::Align textAlign;
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const char* jsonAlign = jsonPaint[SKJSONCANVAS_ATTRIBUTE_TEXTALIGN].asCString();
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if (!strcmp(jsonAlign, SKJSONCANVAS_ALIGN_LEFT)) {
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textAlign = SkPaint::kLeft_Align;
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}
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else if (!strcmp(jsonAlign, SKJSONCANVAS_ALIGN_CENTER)) {
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textAlign = SkPaint::kCenter_Align;
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}
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else if (!strcmp(jsonAlign, SKJSONCANVAS_ALIGN_RIGHT)) {
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textAlign = SkPaint::kRight_Align;
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}
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else {
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SkASSERT(false);
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textAlign = SkPaint::kLeft_Align;
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}
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result->setTextAlign(textAlign);
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}
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if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_TEXTSIZE)) {
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float textSize = jsonPaint[SKJSONCANVAS_ATTRIBUTE_TEXTSIZE].asFloat();
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result->setTextSize(textSize);
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}
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if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_TEXTSCALEX)) {
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float textScaleX = jsonPaint[SKJSONCANVAS_ATTRIBUTE_TEXTSCALEX].asFloat();
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result->setTextScaleX(textScaleX);
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}
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if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_TEXTSKEWX)) {
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float textSkewX = jsonPaint[SKJSONCANVAS_ATTRIBUTE_TEXTSKEWX].asFloat();
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result->setTextSkewX(textSkewX);
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}
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}
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void Renderer::getRect(Json::Value& command, const char* name, SkRect* result) {
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Json::Value rect = command[name];
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result->set(rect[0].asFloat(), rect[1].asFloat(), rect[2].asFloat(), rect[3].asFloat());
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}
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void Renderer::getRRect(Json::Value& command, const char* name, SkRRect* result) {
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Json::Value rrect = command[name];
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SkVector radii[4] = {
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{ rrect[1][0].asFloat(), rrect[1][1].asFloat() },
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{ rrect[2][0].asFloat(), rrect[2][1].asFloat() },
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{ rrect[3][0].asFloat(), rrect[3][1].asFloat() },
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{ rrect[4][0].asFloat(), rrect[4][1].asFloat() }
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};
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result->setRectRadii(SkRect::MakeLTRB(rrect[0][0].asFloat(), rrect[0][1].asFloat(),
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rrect[0][2].asFloat(), rrect[0][3].asFloat()),
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radii);
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}
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void Renderer::getPath(Json::Value& command, SkPath* result) {
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Json::Value path = command[SKJSONCANVAS_ATTRIBUTE_PATH];
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const char* fillType = path[SKJSONCANVAS_ATTRIBUTE_FILLTYPE].asCString();
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if (!strcmp(fillType, SKJSONCANVAS_FILLTYPE_WINDING)) {
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result->setFillType(SkPath::kWinding_FillType);
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}
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else if (!strcmp(fillType, SKJSONCANVAS_FILLTYPE_EVENODD)) {
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result->setFillType(SkPath::kEvenOdd_FillType);
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}
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else if (!strcmp(fillType, SKJSONCANVAS_FILLTYPE_INVERSEWINDING)) {
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result->setFillType(SkPath::kInverseWinding_FillType);
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}
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else if (!strcmp(fillType, SKJSONCANVAS_FILLTYPE_INVERSEEVENODD)) {
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result->setFillType(SkPath::kInverseEvenOdd_FillType);
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}
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Json::Value verbs = path[SKJSONCANVAS_ATTRIBUTE_VERBS];
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for (Json::ArrayIndex i = 0; i < verbs.size(); i++) {
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Json::Value verb = verbs[i];
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if (verb.isString()) {
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SkASSERT(!strcmp(verb.asCString(), SKJSONCANVAS_VERB_CLOSE));
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result->close();
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}
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else {
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if (verb.isMember(SKJSONCANVAS_VERB_MOVE)) {
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Json::Value move = verb[SKJSONCANVAS_VERB_MOVE];
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result->moveTo(move[0].asFloat(), move[1].asFloat());
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}
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else if (verb.isMember(SKJSONCANVAS_VERB_LINE)) {
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Json::Value line = verb[SKJSONCANVAS_VERB_LINE];
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result->lineTo(line[0].asFloat(), line[1].asFloat());
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}
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else if (verb.isMember(SKJSONCANVAS_VERB_QUAD)) {
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Json::Value quad = verb[SKJSONCANVAS_VERB_QUAD];
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result->quadTo(quad[0][0].asFloat(), quad[0][1].asFloat(),
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quad[1][0].asFloat(), quad[1][1].asFloat());
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}
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else if (verb.isMember(SKJSONCANVAS_VERB_CUBIC)) {
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Json::Value cubic = verb[SKJSONCANVAS_VERB_CUBIC];
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result->cubicTo(cubic[0][0].asFloat(), cubic[0][1].asFloat(),
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cubic[1][0].asFloat(), cubic[1][1].asFloat(),
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cubic[2][0].asFloat(), cubic[2][1].asFloat());
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}
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else if (verb.isMember(SKJSONCANVAS_VERB_CONIC)) {
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Json::Value conic = verb[SKJSONCANVAS_VERB_CONIC];
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result->conicTo(conic[0][0].asFloat(), conic[0][1].asFloat(),
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conic[1][0].asFloat(), conic[1][1].asFloat(),
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conic[2].asFloat());
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}
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else {
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SkASSERT(false);
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}
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}
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}
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}
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SkRegion::Op Renderer::getRegionOp(Json::Value& command) {
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const char* op = command[SKJSONCANVAS_ATTRIBUTE_REGIONOP].asCString();
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if (!strcmp(op, SKJSONCANVAS_REGIONOP_DIFFERENCE)) {
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return SkRegion::kDifference_Op;
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}
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else if (!strcmp(op, SKJSONCANVAS_REGIONOP_INTERSECT)) {
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return SkRegion::kIntersect_Op;
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}
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else if (!strcmp(op, SKJSONCANVAS_REGIONOP_UNION)) {
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return SkRegion::kUnion_Op;
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}
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else if (!strcmp(op, SKJSONCANVAS_REGIONOP_XOR)) {
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return SkRegion::kXOR_Op;
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}
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else if (!strcmp(op, SKJSONCANVAS_REGIONOP_REVERSE_DIFFERENCE)) {
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return SkRegion::kReverseDifference_Op;
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}
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else if (!strcmp(op, SKJSONCANVAS_REGIONOP_REPLACE)) {
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return SkRegion::kReplace_Op;
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}
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SkASSERT(false);
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return SkRegion::kIntersect_Op;
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}
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void Renderer::processMatrix(Json::Value& command, SkCanvas* target) {
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Json::Value jsonMatrix = command[SKJSONCANVAS_ATTRIBUTE_MATRIX];
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SkMatrix matrix;
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SkScalar values[] = {
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jsonMatrix[0][0].asFloat(), jsonMatrix[0][1].asFloat(), jsonMatrix[0][2].asFloat(),
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jsonMatrix[1][0].asFloat(), jsonMatrix[1][1].asFloat(), jsonMatrix[1][2].asFloat(),
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jsonMatrix[2][0].asFloat(), jsonMatrix[2][1].asFloat(), jsonMatrix[2][2].asFloat()
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};
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matrix.set9(values);
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target->setMatrix(matrix);
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}
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void Renderer::processSave(Json::Value& command, SkCanvas* target) {
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target->save();
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}
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void Renderer::processRestore(Json::Value& command, SkCanvas* target) {
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target->restore();
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}
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void Renderer::processPaint(Json::Value& command, SkCanvas* target) {
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SkPaint paint;
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this->getPaint(command, &paint);
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target->drawPaint(paint);
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}
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void Renderer::processRect(Json::Value& command, SkCanvas* target) {
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SkRect rect;
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this->getRect(command, SKJSONCANVAS_ATTRIBUTE_COORDS, &rect);
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SkPaint paint;
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this->getPaint(command, &paint);
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target->drawRect(rect, paint);
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}
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void Renderer::processRRect(Json::Value& command, SkCanvas* target) {
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SkRRect rrect;
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this->getRRect(command, SKJSONCANVAS_ATTRIBUTE_COORDS, &rrect);
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SkPaint paint;
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this->getPaint(command, &paint);
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target->drawRRect(rrect, paint);
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}
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void Renderer::processOval(Json::Value& command, SkCanvas* target) {
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SkRect rect;
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this->getRect(command, SKJSONCANVAS_ATTRIBUTE_COORDS, &rect);
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SkPaint paint;
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this->getPaint(command, &paint);
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target->drawOval(rect, paint);
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}
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void Renderer::processPath(Json::Value& command, SkCanvas* target) {
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Json::Value jsonPath = command[SKJSONCANVAS_ATTRIBUTE_PATH];
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SkPath path;
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this->getPath(command, &path);
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SkPaint paint;
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this->getPaint(command, &paint);
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target->drawPath(path, paint);
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}
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void Renderer::processText(Json::Value& command, SkCanvas* target) {
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const char* text = command[SKJSONCANVAS_ATTRIBUTE_TEXT].asCString();
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SkPaint paint;
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this->getPaint(command, &paint);
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Json::Value coords = command[SKJSONCANVAS_ATTRIBUTE_COORDS];
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target->drawText(text, strlen(text), coords[0].asFloat(), coords[1].asFloat(), paint);
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}
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void Renderer::processPosText(Json::Value& command, SkCanvas* target) {
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const char* text = command[SKJSONCANVAS_ATTRIBUTE_TEXT].asCString();
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SkPaint paint;
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this->getPaint(command, &paint);
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Json::Value coords = command[SKJSONCANVAS_ATTRIBUTE_COORDS];
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int count = (int) coords.size();
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SkPoint* points = (SkPoint*) sk_malloc_throw(count * sizeof(SkPoint));
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for (int i = 0; i < count; i++) {
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points[i] = SkPoint::Make(coords[i][0].asFloat(), coords[i][1].asFloat());
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}
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target->drawPosText(text, strlen(text), points, paint);
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free(points);
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}
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void Renderer::processPoints(Json::Value& command, SkCanvas* target) {
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SkCanvas::PointMode mode;
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const char* jsonMode = command[SKJSONCANVAS_ATTRIBUTE_MODE].asCString();
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if (!strcmp(jsonMode, SKJSONCANVAS_POINTMODE_POINTS)) {
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mode = SkCanvas::kPoints_PointMode;
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}
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else if (!strcmp(jsonMode, SKJSONCANVAS_POINTMODE_LINES)) {
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mode = SkCanvas::kLines_PointMode;
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}
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else if (!strcmp(jsonMode, SKJSONCANVAS_POINTMODE_POLYGON)) {
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mode = SkCanvas::kPolygon_PointMode;
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}
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else {
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SkASSERT(false);
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return;
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}
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Json::Value jsonPoints = command[SKJSONCANVAS_ATTRIBUTE_POINTS];
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int count = (int) jsonPoints.size();
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SkPoint* points = (SkPoint*) sk_malloc_throw(count * sizeof(SkPoint));
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for (int i = 0; i < count; i++) {
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points[i] = SkPoint::Make(jsonPoints[i][0].asFloat(), jsonPoints[i][1].asFloat());
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}
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SkPaint paint;
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this->getPaint(command, &paint);
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target->drawPoints(mode, count, points, paint);
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free(points);
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}
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void Renderer::processClipRect(Json::Value& command, SkCanvas* target) {
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SkRect rect;
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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
|