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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 "SkCanvas.h"
      9 #include "SkDrawFilter.h"
     10 #include "SkSurface.h"
     11 #include "Test.h"
     12 
     13 #ifdef SK_SUPPORT_LEGACY_DRAWFILTER
     14 
     15 namespace {
     16 class TestFilter : public SkDrawFilter {
     17 public:
     18     bool filter(SkPaint* p, Type) override {
     19         return true;
     20     }
     21 };
     22 }
     23 
     24 /**
     25  *  canvas.setDrawFilter is defined to be local to the save/restore block, such that if you
     26  *  do the following: save / modify-drawfilter / restore, the current drawfilter should be what
     27  *  it was before the save.
     28  */
     29 static void test_saverestore(skiatest::Reporter* reporter) {
     30     SkAutoTUnref<SkSurface> surface(SkSurface::NewRasterN32Premul(10, 10));
     31     SkCanvas* canvas = surface->getCanvas();
     32 
     33     SkAutoTUnref<TestFilter> df(new TestFilter);
     34 
     35     REPORTER_ASSERT(reporter, nullptr == canvas->getDrawFilter());
     36 
     37     canvas->save();
     38     canvas->setDrawFilter(df);
     39     REPORTER_ASSERT(reporter, nullptr != canvas->getDrawFilter());
     40     canvas->restore();
     41 
     42     REPORTER_ASSERT(reporter, nullptr == canvas->getDrawFilter());
     43 }
     44 
     45 DEF_TEST(DrawFilter, reporter) {
     46     test_saverestore(reporter);
     47 }
     48 
     49 #endif
     50