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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 #include <new>
     17 
     18 // Sums the area of any DrawRect command it sees.
     19 class AreaSummer {
     20 public:
     21     AreaSummer() : fArea(0) {}
     22 
     23     template <typename T> void operator()(const T&) { }
     24 
     25     void operator()(const SkRecords::DrawRect& draw) {
     26         fArea += (int)(draw.rect.width() * draw.rect.height());
     27     }
     28 
     29     int area() const { return fArea; }
     30 
     31     void apply(const SkRecord& record) {
     32         for (int i = 0; i < record.count(); i++) {
     33             record.visit(i, *this);
     34         }
     35     }
     36 
     37 private:
     38     int fArea;
     39 };
     40 
     41 // Scales out the bottom-right corner of any DrawRect command it sees by 2x.
     42 struct Stretch {
     43     template <typename T> void operator()(T*) {}
     44     void operator()(SkRecords::DrawRect* draw) {
     45         draw->rect.fRight *= 2;
     46         draw->rect.fBottom *= 2;
     47     }
     48 
     49     void apply(SkRecord* record) {
     50         for (int i = 0; i < record->count(); i++) {
     51             record->mutate(i, *this);
     52         }
     53     }
     54 };
     55 
     56 #define APPEND(record, type, ...) new (record.append<type>()) type{__VA_ARGS__}
     57 
     58 // Basic tests for the low-level SkRecord code.
     59 DEF_TEST(Record, r) {
     60     SkRecord record;
     61 
     62     // Add a simple DrawRect command.
     63     SkRect rect = SkRect::MakeWH(10, 10);
     64     SkPaint paint;
     65     APPEND(record, SkRecords::DrawRect, paint, rect);
     66 
     67     // Its area should be 100.
     68     AreaSummer summer;
     69     summer.apply(record);
     70     REPORTER_ASSERT(r, summer.area() == 100);
     71 
     72     // Scale 2x.
     73     Stretch stretch;
     74     stretch.apply(&record);
     75 
     76     // Now its area should be 100 + 400.
     77     summer.apply(record);
     78     REPORTER_ASSERT(r, summer.area() == 500);
     79 }
     80 
     81 DEF_TEST(Record_defrag, r) {
     82     SkRecord record;
     83     APPEND(record, SkRecords::Save);
     84     APPEND(record, SkRecords::ClipRect);
     85     APPEND(record, SkRecords::NoOp);
     86     APPEND(record, SkRecords::DrawRect);
     87     APPEND(record, SkRecords::NoOp);
     88     APPEND(record, SkRecords::NoOp);
     89     APPEND(record, SkRecords::Restore);
     90     REPORTER_ASSERT(r, record.count() == 7);
     91 
     92     record.defrag();
     93     REPORTER_ASSERT(r, record.count() == 4);
     94     assert_type<SkRecords::Save    >(r, record, 0);
     95     assert_type<SkRecords::ClipRect>(r, record, 1);
     96     assert_type<SkRecords::DrawRect>(r, record, 2);
     97     assert_type<SkRecords::Restore >(r, record, 3);
     98 }
     99 
    100 #undef APPEND
    101 
    102 template <typename T>
    103 static bool is_aligned(const T* p) {
    104     return (((uintptr_t)p) & (sizeof(T) - 1)) == 0;
    105 }
    106 
    107 DEF_TEST(Record_Alignment, r) {
    108     SkRecord record;
    109     REPORTER_ASSERT(r, is_aligned(record.alloc<uint8_t>()));
    110     REPORTER_ASSERT(r, is_aligned(record.alloc<uint16_t>()));
    111     REPORTER_ASSERT(r, is_aligned(record.alloc<uint32_t>()));
    112     REPORTER_ASSERT(r, is_aligned(record.alloc<void*>()));
    113 
    114     // It's not clear if we care that 8-byte values are aligned on 32-bit machines.
    115     if (sizeof(void*) == 8) {
    116         REPORTER_ASSERT(r, is_aligned(record.alloc<double>()));
    117         REPORTER_ASSERT(r, is_aligned(record.alloc<uint64_t>()));
    118     }
    119 }
    120