114 lines
3.0 KiB
C++
114 lines
3.0 KiB
C++
/*
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* Copyright 2011 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/SkColor.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPoint.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/utils/SkRandom.h"
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#include <stddef.h>
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namespace skiagm {
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class PointsGM : public GM {
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public:
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PointsGM() {}
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protected:
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SkString onShortName() override {
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return SkString("points");
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}
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SkISize onISize() override {
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return SkISize::Make(640, 490);
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}
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static void fill_pts(SkPoint pts[], size_t n, SkRandom* rand) {
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for (size_t i = 0; i < n; i++) {
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// Compute these independently and store in variables, rather
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// than in the parameter-passing expression, to get consistent
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// evaluation order across compilers.
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SkScalar y = rand->nextUScalar1() * 480;
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SkScalar x = rand->nextUScalar1() * 640;
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pts[i].set(x, y);
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}
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}
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void onDraw(SkCanvas* canvas) override {
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canvas->translate(SK_Scalar1, SK_Scalar1);
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SkRandom rand;
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SkPaint p0, p1, p2, p3;
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const size_t n = 99;
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p0.setColor(SK_ColorRED);
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p1.setColor(SK_ColorGREEN);
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p2.setColor(SK_ColorBLUE);
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p3.setColor(SK_ColorWHITE);
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p0.setStrokeWidth(SkIntToScalar(4));
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p2.setStrokeCap(SkPaint::kRound_Cap);
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p2.setStrokeWidth(SkIntToScalar(6));
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SkPoint* pts = new SkPoint[n];
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fill_pts(pts, n, &rand);
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canvas->drawPoints(SkCanvas::kPolygon_PointMode, n, pts, p0);
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canvas->drawPoints(SkCanvas::kLines_PointMode, n, pts, p1);
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canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts, p2);
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canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts, p3);
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delete[] pts;
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}
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private:
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using INHERITED = GM;
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};
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DEF_GM( return new PointsGM; )
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} // namespace skiagm
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#include "include/core/SkMaskFilter.h"
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DEF_SIMPLE_GM(points_maskfilter, canvas, 512, 256) {
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constexpr int N = 30;
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SkPoint pts[N];
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SkRandom rand;
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for (SkPoint& p : pts) {
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p.fX = rand.nextF() * 220 + 18;
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p.fY = rand.nextF() * 220 + 18;
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}
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auto mf = SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 6);
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const SkPaint::Cap caps[] = { SkPaint::kSquare_Cap, SkPaint::kRound_Cap };
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStroke(true);
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paint.setStrokeWidth(10);
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for (auto cap : caps) {
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paint.setStrokeCap(cap);
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paint.setMaskFilter(mf);
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paint.setColor(SK_ColorBLACK);
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canvas->drawPoints(SkCanvas::kPoints_PointMode, N, pts, paint);
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paint.setMaskFilter(nullptr);
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paint.setColor(SK_ColorRED);
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canvas->drawPoints(SkCanvas::kPoints_PointMode, N, pts, paint);
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canvas->translate(256, 0);
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}
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}
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