dbfd7ab108
'static const' means, there must be at most one of these, and initialize it at compile time if possible or runtime if necessary. This leads to unexpected code execution, and TSAN* will complain about races on the guard variables. Generally 'constexpr' or 'const' are better choices. Neither can cause races: they're either intialized at compile time (constexpr) or intialized each time independently (const). This CL prefers constexpr where possible, and uses const where not. It even prefers constexpr over const where they don't make a difference... I want to have lots of examples of constexpr for people to see and mimic. The scoped-to-class static has nothing to do with any of this, and is not changed. * Not yet on the bots, which use an older TSAN. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2300623005 Review-Url: https://codereview.chromium.org/2300623005
130 lines
3.8 KiB
C++
130 lines
3.8 KiB
C++
/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkDashPathEffect.h"
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#include "SkPaint.h"
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#include "SkPath.h"
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#include "SkRRect.h"
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namespace skiagm {
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class ContourStartGM : public GM {
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public:
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ContourStartGM() {
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const SkScalar kMaxDashLen = 100;
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const SkScalar kDashGrowth = 1.2f;
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SkSTArray<100, SkScalar> intervals;
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for (SkScalar len = 1; len < kMaxDashLen; len *= kDashGrowth) {
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intervals.push_back(len);
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intervals.push_back(len);
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}
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fDashPaint.setAntiAlias(true);
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fDashPaint.setStyle(SkPaint::kStroke_Style);
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fDashPaint.setStrokeWidth(6);
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fDashPaint.setColor(0xff008000);
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fDashPaint.setPathEffect(SkDashPathEffect::Make(intervals.begin(), intervals.count(), 0));
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fPointsPaint.setColor(0xff800000);
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fPointsPaint.setStrokeWidth(3);
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fRect = SkRect::MakeLTRB(10, 10, 100, 70);
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}
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protected:
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SkString onShortName() override {
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return SkString("contour_start");
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}
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SkISize onISize() override { return SkISize::Make(kImageWidth, kImageHeight); }
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void onDraw(SkCanvas* canvas) override {
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drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) {
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SkPath path;
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path.addRect(rect, dir, startIndex);
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return path;
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});
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drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) {
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SkPath path;
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path.addOval(rect, dir, startIndex);
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return path;
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});
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drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) {
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SkRRect rrect;
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const SkVector radii[4] = { {15, 15}, {15, 15}, {15, 15}, {15, 15}};
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rrect.setRectRadii(rect, radii);
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SkPath path;
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path.addRRect(rrect, dir, startIndex);
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return path;
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});
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drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) {
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SkRRect rrect;
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rrect.setRect(rect);
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SkPath path;
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path.addRRect(rrect, dir, startIndex);
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return path;
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});
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drawDirs(canvas, [](const SkRect& rect, SkPath::Direction dir, unsigned startIndex) {
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SkRRect rrect;
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rrect.setOval(rect);
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SkPath path;
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path.addRRect(rrect, dir, startIndex);
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return path;
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});
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}
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private:
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static constexpr int kImageWidth = 1200;
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static constexpr int kImageHeight = 600;
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SkPaint fDashPaint, fPointsPaint;
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SkRect fRect;
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void drawDirs(SkCanvas* canvas,
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SkPath (*makePath)(const SkRect&, SkPath::Direction, unsigned)) const {
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drawOneColumn(canvas, SkPath::kCW_Direction, makePath);
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canvas->translate(kImageWidth / 10, 0);
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drawOneColumn(canvas, SkPath::kCCW_Direction, makePath);
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canvas->translate(kImageWidth / 10, 0);
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}
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void drawOneColumn(SkCanvas* canvas, SkPath::Direction dir,
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SkPath (*makePath)(const SkRect&, SkPath::Direction, unsigned)) const {
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SkAutoCanvasRestore acr(canvas, true);
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for (unsigned i = 0; i < 8; ++i) {
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const SkPath path = makePath(fRect, dir, i);
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canvas->drawPath(path, fDashPaint);
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const int n = path.countPoints();
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SkAutoTArray<SkPoint> points(n);
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path.getPoints(points.get(), n);
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canvas->drawPoints(SkCanvas::kPoints_PointMode, n, points.get(), fPointsPaint);
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canvas->translate(0, kImageHeight / 8);
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}
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}
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typedef GM INHERITED;
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};
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DEF_GM( return new ContourStartGM(); )
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} // namespace skiagm
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