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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 "RecordTestUtils.h"
      9 #include "SkBitmap.h"
     10 #include "SkImageInfo.h"
     11 #include "SkRecord.h"
     12 #include "SkRecords.h"
     13 #include "SkShader.h"
     14 #include "Test.h"
     15 
     16 
     17 // Sums the area of any DrawRect command it sees.
     18 class AreaSummer {
     19 public:
     20     AreaSummer() : fArea(0) {}
     21 
     22     template <typename T> void operator()(const T&) { }
     23 
     24     void operator()(const SkRecords::DrawRect& draw) {
     25         fArea += (int)(draw.rect.width() * draw.rect.height());
     26     }
     27 
     28     int area() const { return fArea; }
     29 
     30     void apply(const SkRecord& record) {
     31         for (int i = 0; i < record.count(); i++) {
     32             record.visit(i, *this);
     33         }
     34     }
     35 
     36 private:
     37     int fArea;
     38 };
     39 
     40 // Scales out the bottom-right corner of any DrawRect command it sees by 2x.
     41 struct Stretch {
     42     template <typename T> void operator()(T*) {}
     43     void operator()(SkRecords::DrawRect* draw) {
     44         draw->rect.fRight *= 2;
     45         draw->rect.fBottom *= 2;
     46     }
     47 
     48     void apply(SkRecord* record) {
     49         for (int i = 0; i < record->count(); i++) {
     50             record->mutate(i, *this);
     51         }
     52     }
     53 };
     54 
     55 #define APPEND(record, type, ...) new (record.append<type>()) type{__VA_ARGS__}
     56 
     57 // Basic tests for the low-level SkRecord code.
     58 DEF_TEST(Record, r) {
     59     SkRecord record;
     60 
     61     // Add a simple DrawRect command.
     62     SkRect rect = SkRect::MakeWH(10, 10);
     63     SkPaint paint;
     64     APPEND(record, SkRecords::DrawRect, paint, rect);
     65 
     66     // Its area should be 100.
     67     AreaSummer summer;
     68     summer.apply(record);
     69     REPORTER_ASSERT(r, summer.area() == 100);
     70 
     71     // Scale 2x.
     72     Stretch stretch;
     73     stretch.apply(&record);
     74 
     75     // Now its area should be 100 + 400.
     76     summer.apply(record);
     77     REPORTER_ASSERT(r, summer.area() == 500);
     78 }
     79 
     80 DEF_TEST(Record_defrag, r) {
     81     SkRecord record;
     82     APPEND(record, SkRecords::Save);
     83     APPEND(record, SkRecords::ClipRect);
     84     APPEND(record, SkRecords::NoOp);
     85     APPEND(record, SkRecords::DrawRect);
     86     APPEND(record, SkRecords::NoOp);
     87     APPEND(record, SkRecords::NoOp);
     88     APPEND(record, SkRecords::Restore);
     89     REPORTER_ASSERT(r, record.count() == 7);
     90 
     91     record.defrag();
     92     REPORTER_ASSERT(r, record.count() == 4);
     93     assert_type<SkRecords::Save    >(r, record, 0);
     94     assert_type<SkRecords::ClipRect>(r, record, 1);
     95     assert_type<SkRecords::DrawRect>(r, record, 2);
     96     assert_type<SkRecords::Restore >(r, record, 3);
     97 }
     98 
     99 #undef APPEND
    100 
    101 template <typename T>
    102 static bool is_aligned(const T* p) {
    103     return (((uintptr_t)p) & (sizeof(T) - 1)) == 0;
    104 }
    105 
    106 DEF_TEST(Record_Alignment, r) {
    107     SkRecord record;
    108     REPORTER_ASSERT(r, is_aligned(record.alloc<uint8_t>()));
    109     REPORTER_ASSERT(r, is_aligned(record.alloc<uint16_t>()));
    110     REPORTER_ASSERT(r, is_aligned(record.alloc<uint32_t>()));
    111     REPORTER_ASSERT(r, is_aligned(record.alloc<void*>()));
    112 
    113     // It's not clear if we care that 8-byte values are aligned on 32-bit machines.
    114     if (sizeof(void*) == 8) {
    115         REPORTER_ASSERT(r, is_aligned(record.alloc<double>()));
    116         REPORTER_ASSERT(r, is_aligned(record.alloc<uint64_t>()));
    117     }
    118 }
    119