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      1 /*
      2  * Copyright 2014 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 "SkDeque.h"
      9 #include "SkLayerRasterizer.h"
     10 #include "SkPaint.h"
     11 #include "SkRasterizer.h"
     12 #include "Test.h"
     13 
     14 class SkReadBuffer;
     15 
     16 // Dummy class to place on a paint just to ensure the paint's destructor
     17 // is called.
     18 // ONLY to be used by LayerRasterizer_destructor, since other tests may
     19 // be run in a separate thread, and this class is not threadsafe.
     20 class DummyRasterizer : public SkRasterizer {
     21 public:
     22     DummyRasterizer()
     23         : INHERITED()
     24     {
     25         // Not threadsafe. Only used in one thread.
     26         gCount++;
     27     }
     28 
     29     ~DummyRasterizer() {
     30         // Not threadsafe. Only used in one thread.
     31         gCount--;
     32     }
     33 
     34     static int GetCount() { return gCount; }
     35 
     36     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(DummyRasterizer)
     37 
     38 private:
     39     DummyRasterizer(SkReadBuffer&) {}
     40 
     41     static int gCount;
     42 
     43     typedef SkRasterizer INHERITED;
     44 };
     45 
     46 int DummyRasterizer::gCount;
     47 
     48 // Check to make sure that the SkPaint in the layer has its destructor called.
     49 DEF_TEST(LayerRasterizer_destructor, reporter) {
     50     {
     51         SkPaint paint;
     52         paint.setRasterizer(SkNEW(DummyRasterizer))->unref();
     53         REPORTER_ASSERT(reporter, DummyRasterizer::GetCount() == 1);
     54 
     55         SkLayerRasterizer::Builder builder;
     56         builder.addLayer(paint);
     57     }
     58     REPORTER_ASSERT(reporter, DummyRasterizer::GetCount() == 0);
     59 }
     60 
     61 class LayerRasterizerTester {
     62 public:
     63     static int CountLayers(const SkLayerRasterizer& layerRasterizer) {
     64         return layerRasterizer.fLayers->count();
     65     }
     66 
     67     static const SkDeque& GetLayers(const SkLayerRasterizer& layerRasterizer) {
     68         return *layerRasterizer.fLayers;
     69     }
     70 };
     71 
     72 // MUST stay in sync with definition of SkLayerRasterizer_Rec in SkLayerRasterizer.cpp.
     73 struct SkLayerRasterizer_Rec {
     74     SkPaint     fPaint;
     75     SkVector    fOffset;
     76 };
     77 
     78 static bool equals(const SkLayerRasterizer_Rec& rec1, const SkLayerRasterizer_Rec& rec2) {
     79     return rec1.fPaint == rec2.fPaint && rec1.fOffset == rec2.fOffset;
     80 }
     81 
     82 DEF_TEST(LayerRasterizer_copy, reporter) {
     83     SkLayerRasterizer::Builder builder;
     84     REPORTER_ASSERT(reporter, NULL == builder.snapshotRasterizer());
     85     SkPaint paint;
     86     // Create a bunch of paints with different flags.
     87     for (uint32_t flags = 0x01; flags < SkPaint::kAllFlags; flags <<= 1) {
     88         paint.setFlags(flags);
     89         builder.addLayer(paint, static_cast<SkScalar>(flags), static_cast<SkScalar>(flags));
     90     }
     91 
     92     // Create a layer rasterizer with all the existing layers.
     93     SkAutoTUnref<SkLayerRasterizer> firstCopy(builder.snapshotRasterizer());
     94 
     95     // Add one more layer.
     96     paint.setFlags(SkPaint::kAllFlags);
     97     builder.addLayer(paint);
     98 
     99     SkAutoTUnref<SkLayerRasterizer> oneLarger(builder.snapshotRasterizer());
    100     SkAutoTUnref<SkLayerRasterizer> detached(builder.detachRasterizer());
    101 
    102     // Check the counts for consistency.
    103     const int largerCount = LayerRasterizerTester::CountLayers(*oneLarger.get());
    104     const int smallerCount = LayerRasterizerTester::CountLayers(*firstCopy.get());
    105     REPORTER_ASSERT(reporter, largerCount == LayerRasterizerTester::CountLayers(*detached.get()));
    106     REPORTER_ASSERT(reporter, smallerCount == largerCount - 1);
    107 
    108     const SkLayerRasterizer_Rec* recFirstCopy = NULL;
    109     const SkLayerRasterizer_Rec* recOneLarger = NULL;
    110     const SkLayerRasterizer_Rec* recDetached = NULL;
    111 
    112     const SkDeque& layersFirstCopy = LayerRasterizerTester::GetLayers(*firstCopy.get());
    113     const SkDeque& layersOneLarger = LayerRasterizerTester::GetLayers(*oneLarger.get());
    114     const SkDeque& layersDetached = LayerRasterizerTester::GetLayers(*detached.get());
    115 
    116     // Ensure that our version of SkLayerRasterizer_Rec is the same as the one in
    117     // SkLayerRasterizer.cpp - or at least the same size. If the order were switched, we
    118     // would fail the test elsewhere.
    119     REPORTER_ASSERT(reporter, layersFirstCopy.elemSize() == sizeof(SkLayerRasterizer_Rec));
    120     REPORTER_ASSERT(reporter, layersOneLarger.elemSize() == sizeof(SkLayerRasterizer_Rec));
    121     REPORTER_ASSERT(reporter, layersDetached.elemSize() == sizeof(SkLayerRasterizer_Rec));
    122 
    123     SkDeque::F2BIter iterFirstCopy(layersFirstCopy);
    124     SkDeque::F2BIter iterOneLarger(layersOneLarger);
    125     SkDeque::F2BIter iterDetached(layersDetached);
    126 
    127     for (int i = 0; i < largerCount; ++i) {
    128         recFirstCopy = static_cast<const SkLayerRasterizer_Rec*>(iterFirstCopy.next());
    129         recOneLarger = static_cast<const SkLayerRasterizer_Rec*>(iterOneLarger.next());
    130         recDetached  = static_cast<const SkLayerRasterizer_Rec*>(iterDetached.next());
    131 
    132         REPORTER_ASSERT(reporter, equals(*recOneLarger, *recDetached));
    133         if (smallerCount == i) {
    134             REPORTER_ASSERT(reporter, recFirstCopy == NULL);
    135         } else {
    136             REPORTER_ASSERT(reporter, equals(*recFirstCopy, *recOneLarger));
    137         }
    138     }
    139 }
    140 
    141 DEF_TEST(LayerRasterizer_detachEmpty, reporter) {
    142     SkLayerRasterizer::Builder builder;
    143     REPORTER_ASSERT(reporter, NULL == builder.detachRasterizer());
    144 }
    145