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- /*
- * Copyright 2017 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkImageFilter.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkScalar.h"
- #include "include/effects/SkBlurImageFilter.h"
- #include <initializer_list>
- // For all sigma, the black box should be centered in the red outline. For small sigma,
- // the rectangle is not blurred, but still must be centered properly.
- DEF_SIMPLE_GM(check_small_sigma_offset, canvas, 200, 1200) {
- for (auto sigma : {0.0, 0.1, 0.2, 0.3, 0.4, 0.6, 0.8, 1.0, 1.2}) {
- // border calculation from SkBlurImageFilter
- int border = SkScalarCeilToInt(sigma * 3);
- SkRect r = SkRect::MakeXYWH(50, 50, 100, 50);
- SkRect b = r.makeOutset(border + 1, border + 1);
- b.inset(0.5f, 0.5f);
- SkPaint p;
- p.setColor(SK_ColorRED);
- p.setStyle(SkPaint::Style::kStroke_Style);
- canvas->drawRect(b, p);
- p.reset();
- p.setColor(SK_ColorBLACK);
- p.setImageFilter(SkBlurImageFilter::Make(sigma, sigma, nullptr));
- canvas->drawRect(r, p);
- canvas->translate(0, 100);
- }
- }
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