1 /* 2 * Copyright 2017 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "gm.h" 9 #include "SkBlurImageFilter.h" 10 11 // For all sigma, the black box should be centered in the red outline. For small sigma, 12 // the rectangle is not blurred, but still must be centered properly. 13 14 DEF_SIMPLE_GM(check_small_sigma_offset, canvas, 200, 1200) { 15 16 for (auto sigma : {0.0, 0.1, 0.2, 0.3, 0.4, 0.6, 0.8, 1.0, 1.2}) { 17 // border calculation from SkBlurImageFilter 18 int border = SkScalarCeilToInt(sigma * 3); 19 20 SkRect r = SkRect::MakeXYWH(50, 50, 100, 50); 21 SkRect b = r.makeOutset(border + 1, border + 1); 22 b.inset(0.5f, 0.5f); 23 SkPaint p; 24 p.setColor(SK_ColorRED); 25 p.setStyle(SkPaint::Style::kStroke_Style); 26 27 canvas->drawRect(b, p); 28 29 p.reset(); 30 p.setColor(SK_ColorBLACK); 31 p.setImageFilter(SkBlurImageFilter::Make(sigma, sigma, nullptr)); 32 canvas->drawRect(r, p); 33 34 canvas->translate(0, 100); 35 } 36 } 37
