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 "SkBlurImageFilter.h"
9 #include "SkMaskFilter.h"
10 #include "gm.h"
11 #include "sk_tool_utils.h"
12 
13 
14 DEF_SIMPLE_GM(blurimagevmask, canvas, 700, 1200) {
15     SkPaint paint;
16     paint.setAntiAlias(true);
17     paint.setColor(SK_ColorBLACK);
18 
19     SkFont font(sk_tool_utils::create_portable_typeface(), 25);
20 
21     const double sigmas[] = {3.0, 8.0, 16.0, 24.0, 32.0};
22 
23     canvas->drawString("mask blur",  285, 50, font, paint);
24     canvas->drawString("image blur", 285 + 250, 50, font, paint);
25 
26 
27     SkRect r = {35, 100, 135, 200};
28     for (auto sigma:sigmas) {
29 
30         canvas->drawRect(r, paint);
31 
32         char out[100];
33         sprintf(out, "Sigma: %g", sigma);
34         canvas->drawString(out, r.left(), r.bottom() + 35, font, paint);
35 
36         r.offset(250, 0);
37 
38         paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, sigma));
39         canvas->drawRect(r, paint);
40         paint.setMaskFilter(nullptr);
41 
42         SkPaint imageBlurPaint;
43         r.offset(250, 0);
44         imageBlurPaint.setImageFilter(SkBlurImageFilter::Make(sigma, sigma, nullptr));
45         canvas->saveLayer(nullptr, &imageBlurPaint);
46 
47         canvas->drawRect(r, paint);
48         canvas->restore();
49         r.offset(-500, 200);
50     }
51 
52 }
53 
54 #include "Resources.h"
55 DEF_SIMPLE_GM_CAN_FAIL(blur_image, canvas, errorMsg, 500, 500) {
56     auto image = GetResourceAsImage("images/mandrill_128.png");
57     if (!image) {
58         *errorMsg = "Could not load mandrill_128.png. Did you forget to set the resourcePath?";
59         return skiagm::DrawResult::kFail;
60     }
61 
62     SkPaint paint;
63     paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 4));
64 
65     // both of these should draw with the blur, but (formerally) we had a bug where the unscaled
66     // version (taking the spriteblitter code path) ignore the maskfilter.
67 
68     canvas->drawImage(image, 10, 10, &paint);
69     canvas->scale(1.01f, 1.01f);
70     canvas->drawImage(image, 10 + image->width() + 10.f, 10, &paint);
71     return skiagm::DrawResult::kOk;
72 }
73