1 /*
2  * Copyright 2016 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 #include "SkRRect.h"
11 #include "SkSurface.h"
12 #include "SkClipOpPriv.h"
13 #include "sk_tool_utils.h"
14 
15 #define WIDTH 512
16 #define HEIGHT 512
17 
18 namespace skiagm {
19 
20 class ComplexClipBlurTiledGM : public GM {
21 public:
ComplexClipBlurTiledGM()22     ComplexClipBlurTiledGM() {
23     }
24 
25 protected:
onShortName()26     SkString onShortName() override {
27         return SkString("complexclip_blur_tiled");
28     }
29 
onISize()30     SkISize onISize() override {
31         return SkISize::Make(WIDTH, HEIGHT);
32     }
33 
onDraw(SkCanvas * canvas)34     void onDraw(SkCanvas* canvas) override {
35         SkPaint blurPaint;
36         blurPaint.setImageFilter(SkBlurImageFilter::Make(5.0f, 5.0f, nullptr));
37         const SkScalar tileSize = SkIntToScalar(128);
38         SkRect bounds = canvas->getLocalClipBounds();
39         int ts = SkScalarCeilToInt(tileSize);
40         SkImageInfo info = SkImageInfo::MakeN32Premul(ts, ts);
41         auto tileSurface(sk_tool_utils::makeSurface(canvas, info));
42         SkCanvas* tileCanvas = tileSurface->getCanvas();
43         for (SkScalar y = bounds.top(); y < bounds.bottom(); y += tileSize) {
44             for (SkScalar x = bounds.left(); x < bounds.right(); x += tileSize) {
45                 tileCanvas->save();
46                 tileCanvas->clear(0);
47                 tileCanvas->translate(-x, -y);
48                 SkRect rect = SkRect::MakeWH(WIDTH, HEIGHT);
49                 tileCanvas->saveLayer(&rect, &blurPaint);
50                 SkRRect rrect = SkRRect::MakeRectXY(rect.makeInset(20, 20), 25, 25);
51                 tileCanvas->clipRRect(rrect, kDifference_SkClipOp, true);
52                 SkPaint paint;
53                 tileCanvas->drawRect(rect, paint);
54                 tileCanvas->restore();
55                 tileCanvas->restore();
56                 canvas->drawImage(tileSurface->makeImageSnapshot().get(), x, y);
57             }
58         }
59     }
60 
61 private:
62     typedef GM INHERITED;
63 };
64 
65 //////////////////////////////////////////////////////////////////////////////
66 
67 DEF_GM(return new ComplexClipBlurTiledGM;)
68 
69 }
70