124 lines
3.9 KiB
C++
124 lines
3.9 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/gm.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPath.h"
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#include "include/core/SkPathEffect.h"
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#include "include/core/SkPoint.h"
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#include "include/core/SkRRect.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/effects/SkDashPathEffect.h"
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#include "include/private/SkTArray.h"
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#include "include/private/SkTemplates.h"
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namespace skiagm {
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class ContourStartGM : public GM {
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protected:
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void onOnceBeforeDraw() override {
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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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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, SkPathDirection dir, unsigned startIndex) {
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return SkPath::Rect(rect, dir, startIndex);
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});
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drawDirs(canvas, [](const SkRect& rect, SkPathDirection dir, unsigned startIndex) {
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return SkPath::Oval(rect, dir, startIndex);
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});
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drawDirs(canvas, [](const SkRect& rect, SkPathDirection 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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return SkPath::RRect(rrect, dir, startIndex);
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});
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drawDirs(canvas, [](const SkRect& rect, SkPathDirection dir, unsigned startIndex) {
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SkRRect rrect;
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rrect.setRect(rect);
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return SkPath::RRect(rrect, dir, startIndex);
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});
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drawDirs(canvas, [](const SkRect& rect, SkPathDirection dir, unsigned startIndex) {
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SkRRect rrect;
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rrect.setOval(rect);
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return SkPath::RRect(rrect, dir, startIndex);
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});
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}
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private:
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inline static constexpr int kImageWidth = 1200;
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inline 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&, SkPathDirection, unsigned)) const {
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drawOneColumn(canvas, SkPathDirection::kCW, makePath);
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canvas->translate(kImageWidth / 10, 0);
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drawOneColumn(canvas, SkPathDirection::kCCW, makePath);
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canvas->translate(kImageWidth / 10, 0);
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}
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void drawOneColumn(SkCanvas* canvas, SkPathDirection dir,
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SkPath (*makePath)(const SkRect&, SkPathDirection, 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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using INHERITED = GM;
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};
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DEF_GM( return new ContourStartGM(); )
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} // namespace skiagm
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