submodule/skia/gm/complexclip_blur_tiled.cpp

   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
  26 namespace skiagm {
  27
  28 class ComplexClipBlurTiledGM : public GM {
  29 public:
  30     ComplexClipBlurTiledGM() {
  31     }
  32
  33 protected:
  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
  69 private:
  70     using INHERITED = GM;
  71 };
  72
  73 //////////////////////////////////////////////////////////////////////////////
  74
  75 DEF_GM(return new ComplexClipBlurTiledGM;)
  76
  77 }  // namespace skiagm