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- /*
- * Copyright 2012 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPath.h"
- #include "include/core/SkPathEffect.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkTypes.h"
- #include "include/effects/SkDashPathEffect.h"
- #include "include/effects/SkTrimPathEffect.h"
- #include "include/private/SkTArray.h"
- #include "include/utils/SkParsePath.h"
- #include "tools/timer/TimeUtils.h"
- #include <math.h>
- #include <utility>
- /*
- * Inspired by http://code.google.com/p/chromium/issues/detail?id=112145
- */
- static void flower(SkCanvas* canvas, const SkPath& path, SkScalar intervals[2],
- SkPaint::Join join) {
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setStyle(SkPaint::kStroke_Style);
- paint.setStrokeJoin(join);
- paint.setStrokeWidth(42);
- canvas->drawPath(path, paint);
- paint.setColor(SK_ColorRED);
- paint.setStrokeWidth(21);
- paint.setPathEffect(SkDashPathEffect::Make(intervals, 2, 0));
- canvas->drawPath(path, paint);
- paint.setColor(SK_ColorGREEN);
- paint.setPathEffect(nullptr);
- paint.setStrokeWidth(0);
- canvas->drawPath(path, paint);
- }
- DEF_SIMPLE_GM(dashcubics, canvas, 865, 750) {
- SkPath path;
- const char* d = "M 337,98 C 250,141 250,212 250,212 C 250,212 250,212 250,212"
- "C 250,212 250,212 250,212 C 250,212 250,141 163,98 C 156,195 217,231 217,231"
- "C 217,231 217,231 217,231 C 217,231 217,231 217,231 C 217,231 156,195 75,250"
- "C 156,305 217,269 217,269 C 217,269 217,269 217,269 C 217,269 217,269 217,269"
- "C 217,269 156,305 163,402 C 250,359 250,288 250,288 C 250,288 250,288 250,288"
- "C 250,288 250,288 250,288 C 250,288 250,359 338,402 C 345,305 283,269 283,269"
- "C 283,269 283,269 283,269 C 283,269 283,269 283,269 C 283,269 345,305 425,250"
- "C 344,195 283,231 283,231 C 283,231 283,231 283,231 C 283,231 283,231 283,231"
- "C 283,231 344,195 338,98";
- SkParsePath::FromSVGString(d, &path);
- canvas->translate(-35.f, -55.f);
- for (int x = 0; x < 2; ++x) {
- for (int y = 0; y < 2; ++y) {
- canvas->save();
- canvas->translate(x * 430.f, y * 355.f);
- SkScalar intervals[] = { 5 + (x ? 0 : 0.0001f + 0.0001f), 10 };
- flower(canvas, path, intervals, y ? SkPaint::kDefault_Join : SkPaint::kRound_Join);
- canvas->restore();
- }
- }
- }
- class TrimGM : public skiagm::GM {
- public:
- TrimGM() {
- SkAssertResult(SkParsePath::FromSVGString(
- "M 0,100 C 10, 50 190, 50 200,100"
- "M 200,100 C 210,150 390,150 400,100"
- "M 400,100 C 390, 50 210, 50 200,100"
- "M 200,100 C 190,150 10,150 0,100",
- &fPaths.push_back()));
- SkAssertResult(SkParsePath::FromSVGString(
- "M 0, 75 L 200, 75"
- "M 200, 91 L 200, 91"
- "M 200,108 L 200,108"
- "M 200,125 L 400,125",
- &fPaths.push_back()));
- SkAssertResult(SkParsePath::FromSVGString(
- "M 0,100 L 50, 50"
- "M 50, 50 L 150,150"
- "M 150,150 L 250, 50"
- "M 250, 50 L 350,150"
- "M 350,150 L 400,100",
- &fPaths.push_back()));
- }
- protected:
- SkString onShortName() override { return SkString("trimpatheffect"); }
- SkISize onISize() override {
- return SkISize::Make(1400, 1000);
- }
- void onDraw(SkCanvas* canvas) override {
- static constexpr SkSize kCellSize = { 440, 150 };
- static constexpr SkScalar kOffsets[][2] = {
- { -0.33f, -0.66f },
- { 0 , 1 },
- { 0 , 0.25f},
- { 0.25f, 0.75f},
- { 0.75f, 1 },
- { 1 , 0.75f},
- };
- SkPaint hairlinePaint;
- hairlinePaint.setAntiAlias(true);
- hairlinePaint.setStyle(SkPaint::kStroke_Style);
- hairlinePaint.setStrokeCap(SkPaint::kRound_Cap);
- hairlinePaint.setStrokeWidth(2);
- SkPaint normalPaint = hairlinePaint;
- normalPaint.setStrokeWidth(10);
- normalPaint.setColor(0x8000ff00);
- SkPaint invertedPaint = normalPaint;
- invertedPaint.setColor(0x80ff0000);
- for (const auto& offset : kOffsets) {
- auto start = offset[0] + fOffset,
- stop = offset[1] + fOffset;
- auto normalMode = SkTrimPathEffect::Mode::kNormal,
- invertedMode = SkTrimPathEffect::Mode::kInverted;
- if (fOffset) {
- start -= SkScalarFloorToScalar(start);
- stop -= SkScalarFloorToScalar(stop);
- if (start > stop) {
- using std::swap;
- swap(start, stop);
- swap(normalMode, invertedMode);
- }
- }
- normalPaint.setPathEffect(SkTrimPathEffect::Make(start, stop, normalMode));
- invertedPaint.setPathEffect(SkTrimPathEffect::Make(start, stop, invertedMode));
- {
- SkAutoCanvasRestore acr(canvas, true);
- for (const auto& path : fPaths) {
- canvas->drawPath(path, normalPaint);
- canvas->drawPath(path, invertedPaint);
- canvas->drawPath(path, hairlinePaint);
- canvas->translate(kCellSize.width(), 0);
- }
- }
- canvas->translate(0, kCellSize.height());
- }
- }
- bool onAnimate(double nanos) override {
- fOffset = TimeUtils::NanosToMSec(nanos) / 2000.0f;
- fOffset -= floorf(fOffset);
- return true;
- }
- private:
- SkTArray<SkPath> fPaths;
- SkScalar fOffset = 0;
- typedef skiagm::GM INHERITED;
- };
- DEF_GM(return new TrimGM;)
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