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- /*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColorFilter.h"
- #include "include/core/SkColorPriv.h"
- #include "include/core/SkDrawable.h"
- #include "include/core/SkPath.h"
- #include "include/core/SkPathMeasure.h"
- #include "include/core/SkPictureRecorder.h"
- #include "include/core/SkRegion.h"
- #include "include/core/SkShader.h"
- #include "include/core/SkString.h"
- #include "include/effects/Sk1DPathEffect.h"
- #include "include/effects/SkCornerPathEffect.h"
- #include "include/effects/SkGradientShader.h"
- #include "include/utils/SkRandom.h"
- #include "include/utils/SkTextUtils.h"
- #include "samplecode/Sample.h"
- #include "src/utils/SkUTF.h"
- #include "include/utils/SkParsePath.h"
- static void testparse() {
- SkRect r;
- r.set(0, 0, 10, 10.5f);
- SkPath p, p2;
- SkString str, str2;
- p.addRect(r);
- SkParsePath::ToSVGString(p, &str);
- SkParsePath::FromSVGString(str.c_str(), &p2);
- SkParsePath::ToSVGString(p2, &str2);
- }
- class ArcsView : public Sample {
- class MyDrawable : public SkDrawable {
- SkRect fR;
- SkScalar fSweep;
- public:
- MyDrawable(const SkRect& r) : fR(r), fSweep(0) {}
- void setSweep(SkScalar sweep) {
- if (fSweep != sweep) {
- fSweep = sweep;
- this->notifyDrawingChanged();
- }
- }
- void onDraw(SkCanvas* canvas) override {
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setStrokeWidth(SkIntToScalar(2));
- paint.setStyle(SkPaint::kFill_Style);
- paint.setColor(0x800000FF);
- canvas->drawArc(fR, 0, fSweep, true, paint);
- paint.setColor(0x800FF000);
- canvas->drawArc(fR, 0, fSweep, false, paint);
- paint.setStyle(SkPaint::kStroke_Style);
- paint.setColor(SK_ColorRED);
- canvas->drawArc(fR, 0, fSweep, true, paint);
- paint.setStrokeWidth(0);
- paint.setColor(SK_ColorBLUE);
- canvas->drawArc(fR, 0, fSweep, false, paint);
- }
- SkRect onGetBounds() override {
- SkRect r(fR);
- r.outset(2, 2);
- return r;
- }
- };
- SkRect fRect = {20, 20, 220, 220};
- sk_sp<MyDrawable> fAnimatingDrawable;
- sk_sp<SkDrawable> fRootDrawable;
- SkString name() override { return SkString("Arcs"); }
- static void DrawRectWithLines(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
- canvas->drawRect(r, p);
- canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, p);
- canvas->drawLine(r.fLeft, r.fBottom, r.fRight, r.fTop, p);
- canvas->drawLine(r.fLeft, r.centerY(), r.fRight, r.centerY(), p);
- canvas->drawLine(r.centerX(), r.fTop, r.centerX(), r.fBottom, p);
- }
- static void DrawLabel(SkCanvas* canvas, const SkRect& rect, SkScalar start, SkScalar sweep) {
- SkFont font;
- SkString str;
- str.appendScalar(start);
- str.append(", ");
- str.appendScalar(sweep);
- SkTextUtils::DrawString(canvas, str.c_str(), rect.centerX(),
- rect.fBottom + font.getSize() * 5/4, font, SkPaint(),
- SkTextUtils::kCenter_Align);
- }
- static void DrawArcs(SkCanvas* canvas) {
- SkPaint paint;
- SkRect r;
- SkScalar w = 75;
- SkScalar h = 50;
- r.set(0, 0, w, h);
- paint.setAntiAlias(true);
- paint.setStyle(SkPaint::kStroke_Style);
- canvas->save();
- canvas->translate(SkIntToScalar(10), SkIntToScalar(300));
- paint.setStrokeWidth(SkIntToScalar(1));
- static const SkScalar gAngles[] = {
- 0, 360,
- 0, 45,
- 0, -45,
- 720, 135,
- -90, 269,
- -90, 270,
- -90, 271,
- -180, -270,
- 225, 90
- };
- for (size_t i = 0; i < SK_ARRAY_COUNT(gAngles); i += 2) {
- paint.setColor(SK_ColorBLACK);
- DrawRectWithLines(canvas, r, paint);
- paint.setColor(SK_ColorRED);
- canvas->drawArc(r, gAngles[i], gAngles[i+1], false, paint);
- DrawLabel(canvas, r, gAngles[i], gAngles[i+1]);
- canvas->translate(w * 8 / 7, 0);
- }
- canvas->restore();
- }
- void drawRoot(SkCanvas* canvas) {
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setStrokeWidth(SkIntToScalar(2));
- paint.setStyle(SkPaint::kStroke_Style);
- DrawRectWithLines(canvas, fRect, paint);
- canvas->drawDrawable(fAnimatingDrawable.get());
- DrawArcs(canvas);
- }
- void onOnceBeforeDraw() override {
- testparse();
- this->setBGColor(0xFFDDDDDD);
- fAnimatingDrawable = sk_make_sp<MyDrawable>(fRect);
- SkPictureRecorder recorder;
- this->drawRoot(recorder.beginRecording(SkRect::MakeWH(800, 500)));
- fRootDrawable = recorder.finishRecordingAsDrawable();
- }
- void onDrawContent(SkCanvas* canvas) override {
- canvas->drawDrawable(fRootDrawable.get());
- }
- bool onAnimate(double nanos) override {
- SkScalar angle = SkDoubleToScalar(fmod(1e-9 * nanos * 360 / 24, 360));
- if (fAnimatingDrawable) {
- fAnimatingDrawable->setSweep(angle);
- }
- return true;
- }
- };
- DEF_SAMPLE( return new ArcsView(); )
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