| /* |
| * 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/base/SkTArray.h" |
| #include "include/utils/SkParsePath.h" |
| #include "tools/timer/TimeUtils.h" |
| |
| #include <math.h> |
| #include <utility> |
| |
| using namespace skia_private; |
| |
| /* |
| * 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.setStroke(true); |
| 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() {} |
| |
| void onOnceBeforeDraw() override { |
| 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 getName() const override { return SkString("trimpatheffect"); } |
| |
| SkISize getISize() 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.setStroke(true); |
| 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: |
| TArray<SkPath> fPaths; |
| SkScalar fOffset = 0; |
| |
| using INHERITED = skiagm::GM; |
| }; |
| DEF_GM(return new TrimGM;) |
| |