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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.h"
#include "SkBlurImageFilter.h"
// 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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