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      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     SkAutoTUnref<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.reset(SkBlurMaskFilter::Create(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.get());
     57         SkRect r = { 20, 20, 100, 100 };
     58         canvas->setDrawFilter(nullptr);
     59         canvas->drawRect(r, p);
     60         TestFilter redNoBlur;
     61         canvas->setDrawFilter(&redNoBlur);
     62         canvas->translate(120.0f, 40.0f);
     63         canvas->drawRect(r, p);
     64 
     65         // Must unset if the DrawFilter is from the stack to avoid refcount errors!
     66         canvas->setDrawFilter(nullptr);
     67     }
     68 
     69 private:
     70     typedef GM INHERITED;
     71 };
     72 
     73 DEF_GM( return new DrawFilterGM; )
     74 
     75 #endif
     76