gm/drawfilter.cpp

   1 /*
   2  * Copyright 2015 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 "SkBlurMask.h"
  10 #include "SkBlurMaskFilter.h"
  11 #include "SkCanvas.h"
  12 #include "SkDrawFilter.h"
  13 #include "SkPaint.h"
  14
  15 #ifdef SK_SUPPORT_LEGACY_DRAWFILTER
  16
  17 /**
  18  * Initial test coverage for SkDrawFilter.
  19  * Draws two rectangles; if draw filters are broken, they will match.
  20  * If draw filters are working correctly, the first will be blue and blurred,
  21  * the second red and sharp.
  22  */
  23
  24 namespace {
  25 class TestFilter : public SkDrawFilter {
  26 public:
  27     bool filter(SkPaint* p, Type) override {
  28         p->setColor(SK_ColorRED);
  29         p->setMaskFilter(nullptr);
  30         return true;
  31     }
  32 };
  33 }
  34
  35 class DrawFilterGM : public skiagm::GM {
  36     sk_sp<SkMaskFilter> fBlur;
  37
  38 protected:
  39     SkISize onISize() override {
  40         return SkISize::Make(320, 240);
  41     }
  42
  43     SkString onShortName() override {
  44         return SkString("drawfilter");
  45     }
  46
  47     void onOnceBeforeDraw() override {
  48         fBlur = SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
  49                                        SkBlurMask::ConvertRadiusToSigma(10.0f),
  50                                        kLow_SkBlurQuality);
  51     }
  52
  53     void onDraw(SkCanvas* canvas) override {
  54         SkPaint p;
  55         p.setColor(SK_ColorBLUE);
  56         p.setMaskFilter(fBlur);
  57         SkRect r = { 20, 20, 100, 100 };
  58         canvas->setDrawFilter(nullptr);
  59         canvas->drawRect(r, p);
  60         canvas->setDrawFilter(new TestFilter)->unref();
  61         canvas->translate(120.0f, 40.0f);
  62         canvas->drawRect(r, p);
  63         canvas->setDrawFilter(nullptr);
  64     }
  65
  66 private:
  67     typedef GM INHERITED;
  68 };
  69
  70 DEF_GM( return new DrawFilterGM; )
  71
  72 #endif