/* * 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.setLTRB(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.setWH(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(); )