blob: 1d73d582c9b43e55896b3e65f780d272b295382a [file] [log] [blame]
epoger@google.comec3ed6a2011-07-28 14:26:00 +00001/*
2 * Copyright 2011 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 */
tfarina@chromium.orge4fafb12013-12-12 21:11:12 +00007
reed@android.comed673312009-02-27 16:24:51 +00008#include "Test.h"
tfarina@chromium.orge4fafb12013-12-12 21:11:12 +00009#include "SkColorPriv.h"
10#include "SkEndian.h"
tomhudson@google.com8afae612012-08-14 15:03:35 +000011#include "SkFloatBits.h"
reed@android.comc846ede2010-04-13 15:29:15 +000012#include "SkFloatingPoint.h"
reed@google.com4b163ed2012-08-07 21:35:13 +000013#include "SkMathPriv.h"
reed@android.comed673312009-02-27 16:24:51 +000014#include "SkPoint.h"
15#include "SkRandom.h"
16
reed@google.comc21f86f2013-04-29 14:18:23 +000017static void test_clz(skiatest::Reporter* reporter) {
18 REPORTER_ASSERT(reporter, 32 == SkCLZ(0));
19 REPORTER_ASSERT(reporter, 31 == SkCLZ(1));
20 REPORTER_ASSERT(reporter, 1 == SkCLZ(1 << 30));
reed@google.com7729534d2013-04-29 14:43:50 +000021 REPORTER_ASSERT(reporter, 0 == SkCLZ(~0U));
skia.committer@gmail.com81521132013-04-30 07:01:03 +000022
commit-bot@chromium.orge0e7cfe2013-09-09 20:09:12 +000023 SkRandom rand;
reed@google.comc21f86f2013-04-29 14:18:23 +000024 for (int i = 0; i < 1000; ++i) {
25 uint32_t mask = rand.nextU();
reed@google.combc57a292013-04-29 15:27:42 +000026 // need to get some zeros for testing, but in some obscure way so the
27 // compiler won't "see" that, and work-around calling the functions.
28 mask >>= (mask & 31);
reed@google.comc21f86f2013-04-29 14:18:23 +000029 int intri = SkCLZ(mask);
30 int porta = SkCLZ_portable(mask);
31 REPORTER_ASSERT(reporter, intri == porta);
32 }
33}
34
35///////////////////////////////////////////////////////////////////////////////
36
reed@google.coma7d74612012-05-30 12:30:09 +000037static float sk_fsel(float pred, float result_ge, float result_lt) {
38 return pred >= 0 ? result_ge : result_lt;
39}
40
41static float fast_floor(float x) {
reed@google.comc20bc252012-05-30 13:48:14 +000042// float big = sk_fsel(x, 0x1.0p+23, -0x1.0p+23);
43 float big = sk_fsel(x, (float)(1 << 23), -(float)(1 << 23));
robertphillips@google.com00bf06a2012-05-30 15:19:17 +000044 return (float)(x + big) - big;
reed@google.coma7d74612012-05-30 12:30:09 +000045}
46
47static float std_floor(float x) {
48 return sk_float_floor(x);
49}
50
51static void test_floor_value(skiatest::Reporter* reporter, float value) {
52 float fast = fast_floor(value);
53 float std = std_floor(value);
54 REPORTER_ASSERT(reporter, std == fast);
55// SkDebugf("value[%1.9f] std[%g] fast[%g] equal[%d]\n",
56// value, std, fast, std == fast);
57}
58
59static void test_floor(skiatest::Reporter* reporter) {
60 static const float gVals[] = {
61 0, 1, 1.1f, 1.01f, 1.001f, 1.0001f, 1.00001f, 1.000001f, 1.0000001f
62 };
rmistry@google.comd6176b02012-08-23 18:14:13 +000063
reed@google.coma7d74612012-05-30 12:30:09 +000064 for (size_t i = 0; i < SK_ARRAY_COUNT(gVals); ++i) {
65 test_floor_value(reporter, gVals[i]);
66// test_floor_value(reporter, -gVals[i]);
67 }
68}
69
70///////////////////////////////////////////////////////////////////////////////
71
reed@google.comea774d22013-04-22 20:21:56 +000072// test that SkMul16ShiftRound and SkMulDiv255Round return the same result
73static void test_muldivround(skiatest::Reporter* reporter) {
74#if 0
75 // this "complete" test is too slow, so we test a random sampling of it
76
77 for (int a = 0; a <= 32767; ++a) {
78 for (int b = 0; b <= 32767; ++b) {
79 unsigned prod0 = SkMul16ShiftRound(a, b, 8);
80 unsigned prod1 = SkMulDiv255Round(a, b);
81 SkASSERT(prod0 == prod1);
82 }
83 }
84#endif
85
commit-bot@chromium.orge0e7cfe2013-09-09 20:09:12 +000086 SkRandom rand;
reed@google.comea774d22013-04-22 20:21:56 +000087 for (int i = 0; i < 10000; ++i) {
88 unsigned a = rand.nextU() & 0x7FFF;
89 unsigned b = rand.nextU() & 0x7FFF;
90
91 unsigned prod0 = SkMul16ShiftRound(a, b, 8);
92 unsigned prod1 = SkMulDiv255Round(a, b);
93
94 REPORTER_ASSERT(reporter, prod0 == prod1);
95 }
96}
97
reed@google.com0abb4992011-10-06 20:04:36 +000098static float float_blend(int src, int dst, float unit) {
99 return dst + (src - dst) * unit;
reed@google.com772813a2011-03-30 22:34:45 +0000100}
101
reed@google.com8d7e39c2011-11-09 17:12:08 +0000102static int blend31(int src, int dst, int a31) {
103 return dst + ((src - dst) * a31 * 2114 >> 16);
104 // return dst + ((src - dst) * a31 * 33 >> 10);
105}
106
107static int blend31_slow(int src, int dst, int a31) {
108 int prod = src * a31 + (31 - a31) * dst + 16;
109 prod = (prod + (prod >> 5)) >> 5;
110 return prod;
111}
112
113static int blend31_round(int src, int dst, int a31) {
114 int prod = (src - dst) * a31 + 16;
115 prod = (prod + (prod >> 5)) >> 5;
116 return dst + prod;
117}
118
119static int blend31_old(int src, int dst, int a31) {
120 a31 += a31 >> 4;
121 return dst + ((src - dst) * a31 >> 5);
122}
123
caryclark@google.com42639cd2012-06-06 12:03:39 +0000124// suppress unused code warning
125static int (*blend_functions[])(int, int, int) = {
126 blend31,
127 blend31_slow,
128 blend31_round,
129 blend31_old
130};
131
reed@google.com8d7e39c2011-11-09 17:12:08 +0000132static void test_blend31() {
133 int failed = 0;
134 int death = 0;
caryclark@google.com42639cd2012-06-06 12:03:39 +0000135 if (false) { // avoid bit rot, suppress warning
136 failed = (*blend_functions[0])(0,0,0);
137 }
reed@google.com8d7e39c2011-11-09 17:12:08 +0000138 for (int src = 0; src <= 255; src++) {
139 for (int dst = 0; dst <= 255; dst++) {
140 for (int a = 0; a <= 31; a++) {
141// int r0 = blend31(src, dst, a);
142// int r0 = blend31_round(src, dst, a);
143// int r0 = blend31_old(src, dst, a);
144 int r0 = blend31_slow(src, dst, a);
145
146 float f = float_blend(src, dst, a / 31.f);
147 int r1 = (int)f;
commit-bot@chromium.org4b413c82013-11-25 19:44:07 +0000148 int r2 = SkScalarRoundToInt(f);
reed@google.com8d7e39c2011-11-09 17:12:08 +0000149
150 if (r0 != r1 && r0 != r2) {
bungeman@google.comfab44db2013-10-11 18:50:45 +0000151 SkDebugf("src:%d dst:%d a:%d result:%d float:%g\n",
152 src, dst, a, r0, f);
reed@google.com8d7e39c2011-11-09 17:12:08 +0000153 failed += 1;
154 }
155 if (r0 > 255) {
156 death += 1;
bungeman@google.comfab44db2013-10-11 18:50:45 +0000157 SkDebugf("death src:%d dst:%d a:%d result:%d float:%g\n",
158 src, dst, a, r0, f);
reed@google.com8d7e39c2011-11-09 17:12:08 +0000159 }
160 }
161 }
162 }
163 SkDebugf("---- failed %d death %d\n", failed, death);
164}
165
reed@google.com0abb4992011-10-06 20:04:36 +0000166static void test_blend(skiatest::Reporter* reporter) {
167 for (int src = 0; src <= 255; src++) {
168 for (int dst = 0; dst <= 255; dst++) {
169 for (int a = 0; a <= 255; a++) {
170 int r0 = SkAlphaBlend255(src, dst, a);
171 float f1 = float_blend(src, dst, a / 255.f);
commit-bot@chromium.org4b413c82013-11-25 19:44:07 +0000172 int r1 = SkScalarRoundToInt(f1);
reed@google.com772813a2011-03-30 22:34:45 +0000173
reed@google.com0abb4992011-10-06 20:04:36 +0000174 if (r0 != r1) {
175 float diff = sk_float_abs(f1 - r1);
176 diff = sk_float_abs(diff - 0.5f);
177 if (diff > (1 / 255.f)) {
178#ifdef SK_DEBUG
179 SkDebugf("src:%d dst:%d a:%d result:%d float:%g\n",
180 src, dst, a, r0, f1);
181#endif
182 REPORTER_ASSERT(reporter, false);
183 }
184 }
reed@google.com772813a2011-03-30 22:34:45 +0000185 }
186 }
187 }
188}
reed@google.com772813a2011-03-30 22:34:45 +0000189
reed@android.comed673312009-02-27 16:24:51 +0000190static void check_length(skiatest::Reporter* reporter,
191 const SkPoint& p, SkScalar targetLen) {
reed@android.comed673312009-02-27 16:24:51 +0000192 float x = SkScalarToFloat(p.fX);
193 float y = SkScalarToFloat(p.fY);
194 float len = sk_float_sqrt(x*x + y*y);
reed@android.com80e39a72009-04-02 16:59:40 +0000195
reed@android.comed673312009-02-27 16:24:51 +0000196 len /= SkScalarToFloat(targetLen);
reed@android.com80e39a72009-04-02 16:59:40 +0000197
reed@android.comed673312009-02-27 16:24:51 +0000198 REPORTER_ASSERT(reporter, len > 0.999f && len < 1.001f);
reed@android.comed673312009-02-27 16:24:51 +0000199}
200
commit-bot@chromium.orge0e7cfe2013-09-09 20:09:12 +0000201static float nextFloat(SkRandom& rand) {
reed@android.comed673312009-02-27 16:24:51 +0000202 SkFloatIntUnion data;
203 data.fSignBitInt = rand.nextU();
204 return data.fFloat;
205}
206
207/* returns true if a == b as resulting from (int)x. Since it is undefined
208 what to do if the float exceeds 2^32-1, we check for that explicitly.
209 */
210static bool equal_float_native_skia(float x, uint32_t ni, uint32_t si) {
211 if (!(x == x)) { // NAN
bsalomon@google.com373ebc62012-09-26 13:08:56 +0000212 return ((int32_t)si) == SK_MaxS32 || ((int32_t)si) == SK_MinS32;
reed@android.comed673312009-02-27 16:24:51 +0000213 }
214 // for out of range, C is undefined, but skia always should return NaN32
215 if (x > SK_MaxS32) {
bsalomon@google.com373ebc62012-09-26 13:08:56 +0000216 return ((int32_t)si) == SK_MaxS32;
reed@android.comed673312009-02-27 16:24:51 +0000217 }
218 if (x < -SK_MaxS32) {
bsalomon@google.com373ebc62012-09-26 13:08:56 +0000219 return ((int32_t)si) == SK_MinS32;
reed@android.comed673312009-02-27 16:24:51 +0000220 }
221 return si == ni;
222}
223
224static void assert_float_equal(skiatest::Reporter* reporter, const char op[],
225 float x, uint32_t ni, uint32_t si) {
226 if (!equal_float_native_skia(x, ni, si)) {
halcanary@google.coma9325fa2014-01-10 14:58:10 +0000227 ERRORF(reporter, "%s float %g bits %x native %x skia %x\n",
228 op, x, SkFloat2Bits(x), ni, si);
reed@android.comed673312009-02-27 16:24:51 +0000229 }
230}
231
232static void test_float_cast(skiatest::Reporter* reporter, float x) {
233 int ix = (int)x;
234 int iix = SkFloatToIntCast(x);
235 assert_float_equal(reporter, "cast", x, ix, iix);
236}
237
238static void test_float_floor(skiatest::Reporter* reporter, float x) {
239 int ix = (int)floor(x);
240 int iix = SkFloatToIntFloor(x);
241 assert_float_equal(reporter, "floor", x, ix, iix);
242}
243
244static void test_float_round(skiatest::Reporter* reporter, float x) {
245 double xx = x + 0.5; // need intermediate double to avoid temp loss
246 int ix = (int)floor(xx);
247 int iix = SkFloatToIntRound(x);
248 assert_float_equal(reporter, "round", x, ix, iix);
249}
250
251static void test_float_ceil(skiatest::Reporter* reporter, float x) {
252 int ix = (int)ceil(x);
253 int iix = SkFloatToIntCeil(x);
254 assert_float_equal(reporter, "ceil", x, ix, iix);
255}
256
257static void test_float_conversions(skiatest::Reporter* reporter, float x) {
258 test_float_cast(reporter, x);
259 test_float_floor(reporter, x);
260 test_float_round(reporter, x);
261 test_float_ceil(reporter, x);
262}
263
264static void test_int2float(skiatest::Reporter* reporter, int ival) {
265 float x0 = (float)ival;
266 float x1 = SkIntToFloatCast(ival);
267 float x2 = SkIntToFloatCast_NoOverflowCheck(ival);
268 REPORTER_ASSERT(reporter, x0 == x1);
269 REPORTER_ASSERT(reporter, x0 == x2);
270}
271
272static void unittest_fastfloat(skiatest::Reporter* reporter) {
commit-bot@chromium.orge0e7cfe2013-09-09 20:09:12 +0000273 SkRandom rand;
reed@android.comed673312009-02-27 16:24:51 +0000274 size_t i;
reed@android.com80e39a72009-04-02 16:59:40 +0000275
reed@android.comed673312009-02-27 16:24:51 +0000276 static const float gFloats[] = {
277 0.f, 1.f, 0.5f, 0.499999f, 0.5000001f, 1.f/3,
278 0.000000001f, 1000000000.f, // doesn't overflow
279 0.0000000001f, 10000000000.f // does overflow
280 };
281 for (i = 0; i < SK_ARRAY_COUNT(gFloats); i++) {
reed@android.comed673312009-02-27 16:24:51 +0000282 test_float_conversions(reporter, gFloats[i]);
283 test_float_conversions(reporter, -gFloats[i]);
284 }
reed@android.com80e39a72009-04-02 16:59:40 +0000285
reed@android.comed673312009-02-27 16:24:51 +0000286 for (int outer = 0; outer < 100; outer++) {
287 rand.setSeed(outer);
288 for (i = 0; i < 100000; i++) {
289 float x = nextFloat(rand);
290 test_float_conversions(reporter, x);
291 }
reed@android.com80e39a72009-04-02 16:59:40 +0000292
reed@android.comed673312009-02-27 16:24:51 +0000293 test_int2float(reporter, 0);
294 test_int2float(reporter, 1);
295 test_int2float(reporter, -1);
296 for (i = 0; i < 100000; i++) {
297 // for now only test ints that are 24bits or less, since we don't
298 // round (down) large ints the same as IEEE...
299 int ival = rand.nextU() & 0xFFFFFF;
300 test_int2float(reporter, ival);
301 test_int2float(reporter, -ival);
302 }
303 }
304}
305
reed@google.com077910e2011-02-08 21:56:39 +0000306static float make_zero() {
307 return sk_float_sin(0);
308}
309
310static void unittest_isfinite(skiatest::Reporter* reporter) {
epoger@google.combf083a92011-06-08 18:26:08 +0000311 float nan = sk_float_asin(2);
tomhudson@google.com75589252012-04-10 17:42:21 +0000312 float inf = 1.0f / make_zero();
313 float big = 3.40282e+038f;
reed@google.com077910e2011-02-08 21:56:39 +0000314
reed@google.com077910e2011-02-08 21:56:39 +0000315 REPORTER_ASSERT(reporter, !SkScalarIsNaN(inf));
reed@android.comd4134452011-02-09 02:24:26 +0000316 REPORTER_ASSERT(reporter, !SkScalarIsNaN(-inf));
317 REPORTER_ASSERT(reporter, !SkScalarIsFinite(inf));
318 REPORTER_ASSERT(reporter, !SkScalarIsFinite(-inf));
reed@android.comd4134452011-02-09 02:24:26 +0000319
320 REPORTER_ASSERT(reporter, SkScalarIsNaN(nan));
reed@google.com077910e2011-02-08 21:56:39 +0000321 REPORTER_ASSERT(reporter, !SkScalarIsNaN(big));
322 REPORTER_ASSERT(reporter, !SkScalarIsNaN(-big));
323 REPORTER_ASSERT(reporter, !SkScalarIsNaN(0));
rmistry@google.comd6176b02012-08-23 18:14:13 +0000324
reed@google.com077910e2011-02-08 21:56:39 +0000325 REPORTER_ASSERT(reporter, !SkScalarIsFinite(nan));
reed@google.com077910e2011-02-08 21:56:39 +0000326 REPORTER_ASSERT(reporter, SkScalarIsFinite(big));
327 REPORTER_ASSERT(reporter, SkScalarIsFinite(-big));
328 REPORTER_ASSERT(reporter, SkScalarIsFinite(0));
reed@google.com077910e2011-02-08 21:56:39 +0000329}
330
reed@android.comed673312009-02-27 16:24:51 +0000331static void test_muldiv255(skiatest::Reporter* reporter) {
reed@android.comed673312009-02-27 16:24:51 +0000332 for (int a = 0; a <= 255; a++) {
333 for (int b = 0; b <= 255; b++) {
334 int ab = a * b;
335 float s = ab / 255.0f;
336 int round = (int)floorf(s + 0.5f);
337 int trunc = (int)floorf(s);
reed@android.com80e39a72009-04-02 16:59:40 +0000338
reed@android.comed673312009-02-27 16:24:51 +0000339 int iround = SkMulDiv255Round(a, b);
340 int itrunc = SkMulDiv255Trunc(a, b);
reed@android.com80e39a72009-04-02 16:59:40 +0000341
reed@android.comed673312009-02-27 16:24:51 +0000342 REPORTER_ASSERT(reporter, iround == round);
343 REPORTER_ASSERT(reporter, itrunc == trunc);
reed@android.com80e39a72009-04-02 16:59:40 +0000344
reed@android.comed673312009-02-27 16:24:51 +0000345 REPORTER_ASSERT(reporter, itrunc <= iround);
346 REPORTER_ASSERT(reporter, iround <= a);
347 REPORTER_ASSERT(reporter, iround <= b);
348 }
349 }
reed@android.comed673312009-02-27 16:24:51 +0000350}
351
senorblanco@chromium.orgec7a30c2010-12-07 21:07:56 +0000352static void test_muldiv255ceiling(skiatest::Reporter* reporter) {
353 for (int c = 0; c <= 255; c++) {
354 for (int a = 0; a <= 255; a++) {
355 int product = (c * a + 255);
356 int expected_ceiling = (product + (product >> 8)) >> 8;
357 int webkit_ceiling = (c * a + 254) / 255;
358 REPORTER_ASSERT(reporter, expected_ceiling == webkit_ceiling);
359 int skia_ceiling = SkMulDiv255Ceiling(c, a);
360 REPORTER_ASSERT(reporter, skia_ceiling == webkit_ceiling);
361 }
362 }
363}
364
reed@android.comf0ad0862010-02-09 19:18:38 +0000365static void test_copysign(skiatest::Reporter* reporter) {
366 static const int32_t gTriples[] = {
367 // x, y, expected result
368 0, 0, 0,
369 0, 1, 0,
370 0, -1, 0,
371 1, 0, 1,
372 1, 1, 1,
373 1, -1, -1,
374 -1, 0, 1,
375 -1, 1, 1,
376 -1, -1, -1,
377 };
378 for (size_t i = 0; i < SK_ARRAY_COUNT(gTriples); i += 3) {
379 REPORTER_ASSERT(reporter,
380 SkCopySign32(gTriples[i], gTriples[i+1]) == gTriples[i+2]);
reed@android.comf0ad0862010-02-09 19:18:38 +0000381 float x = (float)gTriples[i];
382 float y = (float)gTriples[i+1];
383 float expected = (float)gTriples[i+2];
384 REPORTER_ASSERT(reporter, sk_float_copysign(x, y) == expected);
reed@android.comf0ad0862010-02-09 19:18:38 +0000385 }
386
commit-bot@chromium.orge0e7cfe2013-09-09 20:09:12 +0000387 SkRandom rand;
reed@android.comf0ad0862010-02-09 19:18:38 +0000388 for (int j = 0; j < 1000; j++) {
389 int ix = rand.nextS();
390 REPORTER_ASSERT(reporter, SkCopySign32(ix, ix) == ix);
391 REPORTER_ASSERT(reporter, SkCopySign32(ix, -ix) == -ix);
392 REPORTER_ASSERT(reporter, SkCopySign32(-ix, ix) == ix);
393 REPORTER_ASSERT(reporter, SkCopySign32(-ix, -ix) == -ix);
394
395 SkScalar sx = rand.nextSScalar1();
396 REPORTER_ASSERT(reporter, SkScalarCopySign(sx, sx) == sx);
397 REPORTER_ASSERT(reporter, SkScalarCopySign(sx, -sx) == -sx);
398 REPORTER_ASSERT(reporter, SkScalarCopySign(-sx, sx) == sx);
399 REPORTER_ASSERT(reporter, SkScalarCopySign(-sx, -sx) == -sx);
400 }
401}
402
tfarina@chromium.orge4fafb12013-12-12 21:11:12 +0000403DEF_TEST(Math, reporter) {
reed@android.comed673312009-02-27 16:24:51 +0000404 int i;
commit-bot@chromium.orge0e7cfe2013-09-09 20:09:12 +0000405 SkRandom rand;
reed@android.com80e39a72009-04-02 16:59:40 +0000406
reed@android.comed673312009-02-27 16:24:51 +0000407 // these should assert
408#if 0
409 SkToS8(128);
410 SkToS8(-129);
411 SkToU8(256);
412 SkToU8(-5);
reed@android.com80e39a72009-04-02 16:59:40 +0000413
reed@android.comed673312009-02-27 16:24:51 +0000414 SkToS16(32768);
415 SkToS16(-32769);
416 SkToU16(65536);
417 SkToU16(-5);
reed@android.com80e39a72009-04-02 16:59:40 +0000418
reed@android.comed673312009-02-27 16:24:51 +0000419 if (sizeof(size_t) > 4) {
420 SkToS32(4*1024*1024);
421 SkToS32(-4*1024*1024);
422 SkToU32(5*1024*1024);
423 SkToU32(-5);
424 }
425#endif
reed@android.com80e39a72009-04-02 16:59:40 +0000426
reed@android.comed673312009-02-27 16:24:51 +0000427 test_muldiv255(reporter);
senorblanco@chromium.orgec7a30c2010-12-07 21:07:56 +0000428 test_muldiv255ceiling(reporter);
reed@android.comf0ad0862010-02-09 19:18:38 +0000429 test_copysign(reporter);
reed@android.com80e39a72009-04-02 16:59:40 +0000430
reed@android.comed673312009-02-27 16:24:51 +0000431 {
432 SkScalar x = SK_ScalarNaN;
433 REPORTER_ASSERT(reporter, SkScalarIsNaN(x));
434 }
reed@android.com80e39a72009-04-02 16:59:40 +0000435
reed@android.comed673312009-02-27 16:24:51 +0000436 for (i = 0; i < 1000; i++) {
437 int value = rand.nextS16();
438 int max = rand.nextU16();
reed@android.com80e39a72009-04-02 16:59:40 +0000439
reed@android.comed673312009-02-27 16:24:51 +0000440 int clamp = SkClampMax(value, max);
441 int clamp2 = value < 0 ? 0 : (value > max ? max : value);
442 REPORTER_ASSERT(reporter, clamp == clamp2);
443 }
reed@android.com80e39a72009-04-02 16:59:40 +0000444
reed@android.come72fee52009-11-16 14:52:01 +0000445 for (i = 0; i < 10000; i++) {
reed@android.comed673312009-02-27 16:24:51 +0000446 SkPoint p;
reed@android.com80e39a72009-04-02 16:59:40 +0000447
tomhudson@google.com75589252012-04-10 17:42:21 +0000448 // These random values are being treated as 32-bit-patterns, not as
449 // ints; calling SkIntToScalar() here produces crashes.
robertphillips@google.com4debcac2012-05-14 16:33:36 +0000450 p.setLength((SkScalar) rand.nextS(),
rmistry@google.comd6176b02012-08-23 18:14:13 +0000451 (SkScalar) rand.nextS(),
robertphillips@google.com4debcac2012-05-14 16:33:36 +0000452 SK_Scalar1);
reed@android.comed673312009-02-27 16:24:51 +0000453 check_length(reporter, p, SK_Scalar1);
robertphillips@google.com4debcac2012-05-14 16:33:36 +0000454 p.setLength((SkScalar) (rand.nextS() >> 13),
rmistry@google.comd6176b02012-08-23 18:14:13 +0000455 (SkScalar) (rand.nextS() >> 13),
robertphillips@google.com4debcac2012-05-14 16:33:36 +0000456 SK_Scalar1);
reed@android.comed673312009-02-27 16:24:51 +0000457 check_length(reporter, p, SK_Scalar1);
458 }
reed@android.com80e39a72009-04-02 16:59:40 +0000459
reed@android.comed673312009-02-27 16:24:51 +0000460 {
461 SkFixed result = SkFixedDiv(100, 100);
462 REPORTER_ASSERT(reporter, result == SK_Fixed1);
463 result = SkFixedDiv(1, SK_Fixed1);
464 REPORTER_ASSERT(reporter, result == 1);
465 }
reed@android.com80e39a72009-04-02 16:59:40 +0000466
reed@android.comed673312009-02-27 16:24:51 +0000467 unittest_fastfloat(reporter);
reed@google.com077910e2011-02-08 21:56:39 +0000468 unittest_isfinite(reporter);
reed@android.com80e39a72009-04-02 16:59:40 +0000469
reed@android.come72fee52009-11-16 14:52:01 +0000470 for (i = 0; i < 10000; i++) {
reed@android.comed673312009-02-27 16:24:51 +0000471 SkFixed numer = rand.nextS();
472 SkFixed denom = rand.nextS();
473 SkFixed result = SkFixedDiv(numer, denom);
reed@google.com01c41a52013-12-20 14:24:21 +0000474 int64_t check = ((int64_t)numer << 16) / denom;
reed@android.com80e39a72009-04-02 16:59:40 +0000475
reed@android.comed673312009-02-27 16:24:51 +0000476 (void)SkCLZ(numer);
477 (void)SkCLZ(denom);
reed@android.com80e39a72009-04-02 16:59:40 +0000478
reed@android.comed673312009-02-27 16:24:51 +0000479 REPORTER_ASSERT(reporter, result != (SkFixed)SK_NaN32);
480 if (check > SK_MaxS32) {
481 check = SK_MaxS32;
482 } else if (check < -SK_MaxS32) {
483 check = SK_MinS32;
484 }
485 REPORTER_ASSERT(reporter, result == (int32_t)check);
reed@android.comed673312009-02-27 16:24:51 +0000486 }
reed@android.com80e39a72009-04-02 16:59:40 +0000487
reed@google.com0abb4992011-10-06 20:04:36 +0000488 test_blend(reporter);
reed@google.com8d7e39c2011-11-09 17:12:08 +0000489
humper@google.com05af1af2013-01-07 16:47:43 +0000490 if (false) test_floor(reporter);
reed@google.coma7d74612012-05-30 12:30:09 +0000491
reed@google.com8d7e39c2011-11-09 17:12:08 +0000492 // disable for now
caryclark@google.com42639cd2012-06-06 12:03:39 +0000493 if (false) test_blend31(); // avoid bit rot, suppress warning
reed@google.comea774d22013-04-22 20:21:56 +0000494
495 test_muldivround(reporter);
reed@google.comc21f86f2013-04-29 14:18:23 +0000496 test_clz(reporter);
reed@android.comed673312009-02-27 16:24:51 +0000497}
498
reed@google.comc9f81662013-05-03 18:06:31 +0000499template <typename T> struct PairRec {
500 T fYin;
501 T fYang;
502};
503
tfarina@chromium.orge4fafb12013-12-12 21:11:12 +0000504DEF_TEST(TestEndian, reporter) {
reed@google.comc9f81662013-05-03 18:06:31 +0000505 static const PairRec<uint16_t> g16[] = {
506 { 0x0, 0x0 },
507 { 0xFFFF, 0xFFFF },
508 { 0x1122, 0x2211 },
509 };
510 static const PairRec<uint32_t> g32[] = {
511 { 0x0, 0x0 },
512 { 0xFFFFFFFF, 0xFFFFFFFF },
513 { 0x11223344, 0x44332211 },
514 };
515 static const PairRec<uint64_t> g64[] = {
516 { 0x0, 0x0 },
517 { 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL },
518 { 0x1122334455667788ULL, 0x8877665544332211ULL },
519 };
520
521 REPORTER_ASSERT(reporter, 0x1122 == SkTEndianSwap16<0x2211>::value);
522 REPORTER_ASSERT(reporter, 0x11223344 == SkTEndianSwap32<0x44332211>::value);
523 REPORTER_ASSERT(reporter, 0x1122334455667788ULL == SkTEndianSwap64<0x8877665544332211ULL>::value);
524
525 for (size_t i = 0; i < SK_ARRAY_COUNT(g16); ++i) {
526 REPORTER_ASSERT(reporter, g16[i].fYang == SkEndianSwap16(g16[i].fYin));
527 }
528 for (size_t i = 0; i < SK_ARRAY_COUNT(g32); ++i) {
529 REPORTER_ASSERT(reporter, g32[i].fYang == SkEndianSwap32(g32[i].fYin));
530 }
531 for (size_t i = 0; i < SK_ARRAY_COUNT(g64); ++i) {
532 REPORTER_ASSERT(reporter, g64[i].fYang == SkEndianSwap64(g64[i].fYin));
533 }
534}
535
commit-bot@chromium.org2c86fbb2013-09-26 19:22:54 +0000536template <typename T>
537static void test_divmod(skiatest::Reporter* r) {
538 const struct {
539 T numer;
540 T denom;
541 } kEdgeCases[] = {
542 {(T)17, (T)17},
543 {(T)17, (T)4},
544 {(T)0, (T)17},
545 // For unsigned T these negatives are just some large numbers. Doesn't hurt to test them.
546 {(T)-17, (T)-17},
547 {(T)-17, (T)4},
548 {(T)17, (T)-4},
549 {(T)-17, (T)-4},
550 };
551
552 for (size_t i = 0; i < SK_ARRAY_COUNT(kEdgeCases); i++) {
553 const T numer = kEdgeCases[i].numer;
554 const T denom = kEdgeCases[i].denom;
555 T div, mod;
556 SkTDivMod(numer, denom, &div, &mod);
557 REPORTER_ASSERT(r, numer/denom == div);
558 REPORTER_ASSERT(r, numer%denom == mod);
559 }
560
561 SkRandom rand;
562 for (size_t i = 0; i < 10000; i++) {
563 const T numer = (T)rand.nextS();
564 T denom = 0;
565 while (0 == denom) {
566 denom = (T)rand.nextS();
567 }
568 T div, mod;
569 SkTDivMod(numer, denom, &div, &mod);
570 REPORTER_ASSERT(r, numer/denom == div);
571 REPORTER_ASSERT(r, numer%denom == mod);
572 }
573}
574
575DEF_TEST(divmod_u8, r) {
576 test_divmod<uint8_t>(r);
577}
578
579DEF_TEST(divmod_u16, r) {
580 test_divmod<uint16_t>(r);
581}
582
583DEF_TEST(divmod_u32, r) {
584 test_divmod<uint32_t>(r);
585}
586
587DEF_TEST(divmod_u64, r) {
588 test_divmod<uint64_t>(r);
589}
590
591DEF_TEST(divmod_s8, r) {
592 test_divmod<int8_t>(r);
593}
594
595DEF_TEST(divmod_s16, r) {
596 test_divmod<int16_t>(r);
597}
598
599DEF_TEST(divmod_s32, r) {
600 test_divmod<int32_t>(r);
601}
602
603DEF_TEST(divmod_s64, r) {
604 test_divmod<int64_t>(r);
605}