| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm.h" |
| |
| #include "SkDashPathEffect.h" |
| #include "SkPaint.h" |
| #include "SkPath.h" |
| #include "SkRRect.h" |
| |
| namespace skiagm { |
| |
| class ContourStartGM : public GM { |
| public: |
| ContourStartGM() { |
| const SkScalar kMaxDashLen = 100; |
| const SkScalar kDashGrowth = 1.2f; |
| |
| SkSTArray<100, SkScalar> intervals; |
| for (SkScalar len = 1; len < kMaxDashLen; len *= kDashGrowth) { |
| intervals.push_back(len); |
| intervals.push_back(len); |
| } |
| |
| fDashPaint.setAntiAlias(true); |
| fDashPaint.setStyle(SkPaint::kStroke_Style); |
| fDashPaint.setStrokeWidth(6); |
| fDashPaint.setColor(0xff008000); |
| fDashPaint.setPathEffect(SkDashPathEffect::Make(intervals.begin(), intervals.count(), 0)); |
| |
| fPointsPaint.setColor(0xff800000); |
| fPointsPaint.setStrokeWidth(3); |
| |
| fRect = SkRect::MakeLTRB(10, 10, 100, 70); |
| } |
| |
| protected: |
| SkString onShortName() override { |
| return SkString("contour_start"); |
| } |
| |
| SkISize onISize() override { return SkISize::Make(kImageWidth, kImageHeight); } |
| |
| void onDraw(SkCanvas* canvas) override { |
| |
| drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) { |
| SkPath path; |
| path.addRect(rect, dir, startIndex); |
| return path; |
| }); |
| |
| drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) { |
| SkPath path; |
| path.addOval(rect, dir, startIndex); |
| return path; |
| }); |
| |
| drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) { |
| SkRRect rrect; |
| const SkVector radii[4] = { {15, 15}, {15, 15}, {15, 15}, {15, 15}}; |
| rrect.setRectRadii(rect, radii); |
| |
| SkPath path; |
| path.addRRect(rrect, dir, startIndex); |
| return path; |
| }); |
| |
| drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) { |
| SkRRect rrect; |
| rrect.setRect(rect); |
| |
| SkPath path; |
| path.addRRect(rrect, dir, startIndex); |
| return path; |
| }); |
| |
| drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) { |
| SkRRect rrect; |
| rrect.setOval(rect); |
| |
| SkPath path; |
| path.addRRect(rrect, dir, startIndex); |
| return path; |
| }); |
| |
| } |
| |
| private: |
| static const int kImageWidth = 1200; |
| static const int kImageHeight = 600; |
| |
| SkPaint fDashPaint, fPointsPaint; |
| SkRect fRect; |
| |
| void drawDirs(SkCanvas* canvas, |
| SkPath (*makePath)(const SkRect&, SkPath::Direction, unsigned)) const { |
| drawOneColumn(canvas, SkPath::kCW_Direction, makePath); |
| canvas->translate(kImageWidth / 10, 0); |
| drawOneColumn(canvas, SkPath::kCCW_Direction, makePath); |
| canvas->translate(kImageWidth / 10, 0); |
| } |
| |
| void drawOneColumn(SkCanvas* canvas, SkPath::Direction dir, |
| SkPath (*makePath)(const SkRect&, SkPath::Direction, unsigned)) const { |
| SkAutoCanvasRestore acr(canvas, true); |
| |
| for (unsigned i = 0; i < 8; ++i) { |
| const SkPath path = makePath(fRect, dir, i); |
| canvas->drawPath(path, fDashPaint); |
| |
| const int n = path.countPoints(); |
| SkAutoTArray<SkPoint> points(n); |
| path.getPoints(points.get(), n); |
| canvas->drawPoints(SkCanvas::kPoints_PointMode, n, points.get(), fPointsPaint); |
| |
| canvas->translate(0, kImageHeight / 8); |
| } |
| } |
| |
| typedef GM INHERITED; |
| }; |
| |
| DEF_GM( return new ContourStartGM(); ) |
| |
| } // namespace skiagm |
| |