1
2 /*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8 #include "Test.h"
9 #include "SkClampRange.h"
10 #include "SkRandom.h"
11
12 static skiatest::Reporter* gReporter;
13
debug_me()14 static void debug_me() {
15 if (NULL == gReporter) {
16 SkDebugf("dsfdssd\n");
17 }
18 }
19
20 #ifdef USE_REPORTER
21
22 #define R_ASSERT(cond) \
23 do { if (!(cond)) { \
24 debug_me(); \
25 REPORTER_ASSERT(gReporter, cond); \
26 }} while (0)
27
28 #else
29 #define R_ASSERT(cond) \
30 do { if (!(cond)) { \
31 debug_me(); \
32 }} while (0)
33 #endif
34
classify_value(SkFixed fx,int v0,int v1)35 static int classify_value(SkFixed fx, int v0, int v1) {
36 if (fx <= 0) {
37 return v0;
38 }
39 if (fx >= 0xFFFF) {
40 return v1;
41 }
42 R_ASSERT(false);
43 return 0;
44 }
45
46 #define V0 -42
47 #define V1 1024
48
slow_check(const SkClampRange & range,SkFixed fx,SkFixed dx,int count)49 static void slow_check(const SkClampRange& range,
50 SkFixed fx, SkFixed dx, int count) {
51 SkASSERT(range.fCount0 + range.fCount1 + range.fCount2 == count);
52
53 int i;
54 if (range.fOverflowed) {
55 fx = range.fFx1;
56 for (i = 0; i < range.fCount1; i++) {
57 R_ASSERT(fx >= 0 && fx <= 0xFFFF);
58 fx += dx;
59 }
60 } else {
61 for (i = 0; i < range.fCount0; i++) {
62 int v = classify_value(fx, V0, V1);
63 R_ASSERT(v == range.fV0);
64 fx += dx;
65 }
66 if (range.fCount1 > 0 && fx != range.fFx1) {
67 SkDebugf("%x %x\n", fx, range.fFx1);
68 R_ASSERT(!"bad fFx1");
69 return;
70 }
71 for (i = 0; i < range.fCount1; i++) {
72 R_ASSERT(fx >= 0 && fx <= 0xFFFF);
73 fx += dx;
74 }
75 for (i = 0; i < range.fCount2; i++) {
76 int v = classify_value(fx, V0, V1);
77 R_ASSERT(v == range.fV1);
78 fx += dx;
79 }
80 }
81 }
82
test_range(SkFixed fx,SkFixed dx,int count)83 static void test_range(SkFixed fx, SkFixed dx, int count) {
84 SkClampRange range;
85 range.init(fx, dx, count, V0, V1);
86 slow_check(range, fx, dx, count);
87 }
88
89 #define ff(x) SkIntToFixed(x)
90
91 void TestClampRange(skiatest::Reporter* reporter);
TestClampRange(skiatest::Reporter * reporter)92 void TestClampRange(skiatest::Reporter* reporter) {
93 gReporter = reporter;
94
95 test_range(0, 0, 20);
96 test_range(0xFFFF, 0, 20);
97 test_range(-ff(2), 0, 20);
98 test_range( ff(2), 0, 20);
99
100 test_range(-10, 1, 20);
101 test_range(10, -1, 20);
102 test_range(-10, 3, 20);
103 test_range(10, -3, 20);
104
105 test_range(ff(1), ff(16384), 100);
106 test_range(ff(-1), ff(-16384), 100);
107 test_range(ff(1)/2, ff(16384), 100);
108 test_range(ff(1)/2, ff(-16384), 100);
109
110 SkRandom rand;
111
112 // test non-overflow cases
113 for (int i = 0; i < 1000000; i++) {
114 SkFixed fx = rand.nextS() >> 1;
115 SkFixed sx = rand.nextS() >> 1;
116 int count = rand.nextU() % 1000 + 1;
117 SkFixed dx = (sx - fx) / count;
118 test_range(fx, dx, count);
119 }
120
121 // test overflow cases
122 for (int i = 0; i < 100000; i++) {
123 SkFixed fx = rand.nextS();
124 SkFixed dx = rand.nextS();
125 int count = rand.nextU() % 1000 + 1;
126 test_range(fx, dx, count);
127 }
128 }
129
130 #ifdef USE_REPORTER
131
132 #include "TestClassDef.h"
133 DEFINE_TESTCLASS("ClampRange", ClampRangeClass, TestClampRange)
134
135 #endif
136