d7639aff10
- replace virtual with override.
- remove default constructor.
- use default field initializers
- move work from constructor into onOnceBeforeDraw
- mark everything private
- enum { N = 100 }; constants to constexpr
- remove unused variables
Change-Id: I8c7a19bc24fec416a6b88d634ee948d3e842b986
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/228056
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
89 lines
2.6 KiB
C++
89 lines
2.6 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 "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 "samplecode/Sample.h"
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// ensure that we don't accidentally screw up the bounds when the oval is
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// fractional, and the impl computes the center and radii, and uses them to
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// reconstruct the edges of the circle.
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// see bug# 1504910
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static void test_circlebounds(SkCanvas*) {
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SkRect r = { 1.39999998f, 1, 21.3999996f, 21 };
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SkPath p;
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p.addOval(r);
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SkASSERT(r == p.getBounds());
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}
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class CircleView : public Sample {
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SkString name() override { return SkString("Circles"); }
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void circle(SkCanvas* canvas, int width, bool aa) {
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SkPaint paint;
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paint.setAntiAlias(aa);
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if (width < 0) {
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paint.setStyle(SkPaint::kFill_Style);
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} else {
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(SkIntToScalar(width));
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}
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canvas->drawCircle(0, 0, 9.0f, paint);
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if (false) { // avoid bit rot, suppress warning
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test_circlebounds(canvas);
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}
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}
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void drawSix(SkCanvas* canvas, SkScalar dx, SkScalar dy) {
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for (int width = -1; width <= 1; width++) {
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canvas->save();
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circle(canvas, width, false);
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canvas->translate(0, dy);
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circle(canvas, width, true);
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canvas->restore();
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canvas->translate(dx, 0);
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}
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}
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static void make_poly(SkPath* path, int n) {
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if (n <= 0) {
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return;
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}
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path->incReserve(n + 1);
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path->moveTo(SK_Scalar1, 0);
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SkScalar step = SK_ScalarPI * 2 / n;
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SkScalar angle = 0;
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for (int i = 1; i < n; i++) {
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angle += step;
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path->lineTo(SkScalarCos(angle), SkScalarSin(angle));
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}
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path->close();
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}
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void onDrawContent(SkCanvas* canvas) override {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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SkMatrix matrix;
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matrix.setScale(SkIntToScalar(100), SkIntToScalar(100));
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matrix.postTranslate(SkIntToScalar(200), SkIntToScalar(200));
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canvas->concat(matrix);
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for (int n = 3; n < 20; n++) {
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SkPath path;
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make_poly(&path, n);
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SkAutoCanvasRestore acr(canvas, true);
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canvas->rotate(SkIntToScalar(10) * (n - 3));
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canvas->translate(-SK_Scalar1, 0);
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canvas->drawPath(path, paint);
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}
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}
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};
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DEF_SAMPLE( return new CircleView(); )
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