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/gm.h"
9#include "include/core/SkCanvas.h"
10#include "include/core/SkImageFilter.h"
11#include "include/core/SkImageInfo.h"
12#include "include/core/SkPaint.h"
13#include "include/core/SkRRect.h"
14#include "include/core/SkRect.h"
15#include "include/core/SkRefCnt.h"
16#include "include/core/SkScalar.h"
17#include "include/core/SkSize.h"
18#include "include/core/SkString.h"
19#include "include/core/SkSurface.h"
20#include "include/effects/SkImageFilters.h"
21#include "tools/ToolUtils.h"
22
23#define WIDTH 512
24#define HEIGHT 512
25
26namespace skiagm {
27
28class ComplexClipBlurTiledGM : public GM {
29public:
30    ComplexClipBlurTiledGM() {
31    }
32
33protected:
34    SkString onShortName() override {
35        return SkString("complexclip_blur_tiled");
36    }
37
38    SkISize onISize() override {
39        return SkISize::Make(WIDTH, HEIGHT);
40    }
41
42    void onDraw(SkCanvas* canvas) override {
43        SkPaint blurPaint;
44        blurPaint.setImageFilter(SkImageFilters::Blur(5.0f, 5.0f, nullptr));
45        const SkScalar tileSize = SkIntToScalar(128);
46        SkRect bounds = canvas->getLocalClipBounds();
47        int ts = SkScalarCeilToInt(tileSize);
48        SkImageInfo info = SkImageInfo::MakeN32Premul(ts, ts);
49        auto           tileSurface(ToolUtils::makeSurface(canvas, info));
50        SkCanvas* tileCanvas = tileSurface->getCanvas();
51        for (SkScalar y = bounds.top(); y < bounds.bottom(); y += tileSize) {
52            for (SkScalar x = bounds.left(); x < bounds.right(); x += tileSize) {
53                tileCanvas->save();
54                tileCanvas->clear(0);
55                tileCanvas->translate(-x, -y);
56                SkRect rect = SkRect::MakeWH(WIDTH, HEIGHT);
57                tileCanvas->saveLayer(&rect, &blurPaint);
58                SkRRect rrect = SkRRect::MakeRectXY(rect.makeInset(20, 20), 25, 25);
59                tileCanvas->clipRRect(rrect, SkClipOp::kDifference, true);
60                SkPaint paint;
61                tileCanvas->drawRect(rect, paint);
62                tileCanvas->restore();
63                tileCanvas->restore();
64                canvas->drawImage(tileSurface->makeImageSnapshot().get(), x, y);
65            }
66        }
67    }
68
69private:
70    using INHERITED = GM;
71};
72
73//////////////////////////////////////////////////////////////////////////////
74
75DEF_GM(return new ComplexClipBlurTiledGM;)
76
77}  // namespace skiagm
78