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skia2/tests/StrokerTest.cpp
scroggo f9d610179d There can be only one (SkRandom)! 
Remove SkLCGRandom. We already decided the new one was better, which is
why we wrote the new SkRandom.

Convert GMs that were using SkLCGRandom to use the improved SkRandom.
Motivated by the fact that these GMs draw differently on some runs. We
believe this to be a result of using the old SkLCGRandom.

Add each of the tests that were using SkLCGRandom to ignore-tests.txt,
since we expect they'll draw differently using SkRandom.

Move a trimmed down version of SkLCGRandom into SkDiscretePathEffect.
In order to preserve the old behavior, trim down SkLCGRandom to only
the methods used by SkDiscretePathEffect, and hide it in
SkDiscretePathEffect's cpp file.

BUG=skia:3241

Review URL: https://codereview.chromium.org/805963002
2014-12-15 12:54:51 -08:00

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#include "PathOpsCubicIntersectionTestData.h"
#include "PathOpsQuadIntersectionTestData.h"
#include "SkCommonFlags.h"
#include "SkPaint.h"
#include "SkPath.h"
#include "SkRandom.h"
#include "SkStrokerPriv.h"
#include "SkTime.h"
#include "Test.h"
DEFINE_bool(timeout, true, "run until alloted time expires");
#define MS_TEST_DURATION 10
const SkScalar widths[] = {-FLT_MAX, -1, -0.1f, -FLT_EPSILON, 0, FLT_EPSILON,
0.0000001f, 0.000001f, 0.00001f, 0.0001f, 0.001f, 0.01f,
0.1f, 0.2f, 0.3f, 0.4f, 0.5f, 1, 1.1f, 2, 10, 10e2f, 10e3f, 10e4f, 10e5f, 10e6f, 10e7f,
10e8f, 10e9f, 10e10f, 10e20f, FLT_MAX };
size_t widths_count = SK_ARRAY_COUNT(widths);
static void pathTest(const SkPath& path) {
SkPaint p;
SkPath fill;
p.setStyle(SkPaint::kStroke_Style);
for (size_t index = 0; index < widths_count; ++index) {
p.setStrokeWidth(widths[index]);
p.getFillPath(path, &fill);
}
}
static void cubicTest(const SkPoint c[4]) {
SkPath path;
path.moveTo(c[0].fX, c[0].fY);
path.cubicTo(c[1].fX, c[1].fY, c[2].fX, c[2].fY, c[3].fX, c[3].fY);
pathTest(path);
}
static void quadTest(const SkPoint c[3]) {
SkPath path;
path.moveTo(c[0].fX, c[0].fY);
path.quadTo(c[1].fX, c[1].fY, c[2].fX, c[2].fY);
pathTest(path);
}
static void cubicSetTest(const SkDCubic* dCubic, size_t count) {
SkMSec limit = SkTime::GetMSecs() + MS_TEST_DURATION;
for (size_t index = 0; index < count; ++index) {
const SkDCubic& d = dCubic[index];
SkPoint c[4] = { {(float) d[0].fX, (float) d[0].fY}, {(float) d[1].fX, (float) d[1].fY},
{(float) d[2].fX, (float) d[2].fY}, {(float) d[3].fX, (float) d[3].fY} };
cubicTest(c);
if (FLAGS_timeout && SkTime::GetMSecs() > limit) {
return;
}
}
}
static void cubicPairSetTest(const SkDCubic dCubic[][2], size_t count) {
SkMSec limit = SkTime::GetMSecs() + MS_TEST_DURATION;
for (size_t index = 0; index < count; ++index) {
for (int pair = 0; pair < 2; ++pair) {
const SkDCubic& d = dCubic[index][pair];
SkPoint c[4] = { {(float) d[0].fX, (float) d[0].fY}, {(float) d[1].fX, (float) d[1].fY},
{(float) d[2].fX, (float) d[2].fY}, {(float) d[3].fX, (float) d[3].fY} };
cubicTest(c);
if (FLAGS_timeout && SkTime::GetMSecs() > limit) {
return;
}
}
}
}
static void quadSetTest(const SkDQuad* dQuad, size_t count) {
SkMSec limit = SkTime::GetMSecs() + MS_TEST_DURATION;
for (size_t index = 0; index < count; ++index) {
const SkDQuad& d = dQuad[index];
SkPoint c[3] = { {(float) d[0].fX, (float) d[0].fY}, {(float) d[1].fX, (float) d[1].fY},
{(float) d[2].fX, (float) d[2].fY} };
quadTest(c);
if (FLAGS_timeout && SkTime::GetMSecs() > limit) {
return;
}
}
}
static void quadPairSetTest(const SkDQuad dQuad[][2], size_t count) {
SkMSec limit = SkTime::GetMSecs() + MS_TEST_DURATION;
for (size_t index = 0; index < count; ++index) {
for (int pair = 0; pair < 2; ++pair) {
const SkDQuad& d = dQuad[index][pair];
SkPoint c[3] = { {(float) d[0].fX, (float) d[0].fY}, {(float) d[1].fX, (float) d[1].fY},
{(float) d[2].fX, (float) d[2].fY} };
quadTest(c);
if (FLAGS_timeout && SkTime::GetMSecs() > limit) {
return;
}
}
}
}
DEF_TEST(QuadStrokerSet, reporter) {
quadSetTest(quadraticLines, quadraticLines_count);
quadSetTest(quadraticPoints, quadraticPoints_count);
quadSetTest(quadraticModEpsilonLines, quadraticModEpsilonLines_count);
quadPairSetTest(quadraticTests, quadraticTests_count);
}
DEF_TEST(CubicStrokerSet, reporter) {
cubicSetTest(pointDegenerates, pointDegenerates_count);
cubicSetTest(notPointDegenerates, notPointDegenerates_count);
cubicSetTest(lines, lines_count);
cubicSetTest(notLines, notLines_count);
cubicSetTest(modEpsilonLines, modEpsilonLines_count);
cubicSetTest(lessEpsilonLines, lessEpsilonLines_count);
cubicSetTest(negEpsilonLines, negEpsilonLines_count);
cubicPairSetTest(tests, tests_count);
}
static SkScalar unbounded(SkRandom& r) {
uint32_t val = r.nextU();
return SkBits2Float(val);
}
static SkScalar unboundedPos(SkRandom& r) {
uint32_t val = r.nextU() & 0x7fffffff;
return SkBits2Float(val);
}
DEF_TEST(QuadStrokerUnbounded, reporter) {
SkRandom r;
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
int best = 0;
sk_bzero(gMaxRecursion, sizeof(gMaxRecursion[0]) * 3);
#endif
SkMSec limit = SkTime::GetMSecs() + MS_TEST_DURATION;
for (int i = 0; i < 1000000; ++i) {
SkPath path, fill;
path.moveTo(unbounded(r), unbounded(r));
path.quadTo(unbounded(r), unbounded(r), unbounded(r), unbounded(r));
p.setStrokeWidth(unboundedPos(r));
p.getFillPath(path, &fill);
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (best < gMaxRecursion[2]) {
if (FLAGS_veryVerbose) {
SkDebugf("\n%s quad=%d width=%1.9g\n", __FUNCTION__, gMaxRecursion[2],
p.getStrokeWidth());
path.dumpHex();
SkDebugf("fill:\n");
fill.dumpHex();
}
best = gMaxRecursion[2];
}
#endif
if (FLAGS_timeout && SkTime::GetMSecs() > limit) {
return;
}
}
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (FLAGS_veryVerbose) {
SkDebugf("\n%s max quad=%d\n", __FUNCTION__, best);
}
#endif
}
DEF_TEST(CubicStrokerUnbounded, reporter) {
SkRandom r;
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
int bestTan = 0;
int bestCubic = 0;
sk_bzero(gMaxRecursion, sizeof(gMaxRecursion[0]) * 3);
#endif
SkMSec limit = SkTime::GetMSecs() + MS_TEST_DURATION;
for (int i = 0; i < 1000000; ++i) {
SkPath path, fill;
path.moveTo(unbounded(r), unbounded(r));
path.cubicTo(unbounded(r), unbounded(r), unbounded(r), unbounded(r),
unbounded(r), unbounded(r));
p.setStrokeWidth(unboundedPos(r));
p.getFillPath(path, &fill);
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (bestTan < gMaxRecursion[0] || bestCubic < gMaxRecursion[1]) {
if (FLAGS_veryVerbose) {
SkDebugf("\n%s tan=%d cubic=%d width=%1.9g\n", __FUNCTION__, gMaxRecursion[0],
gMaxRecursion[1], p.getStrokeWidth());
path.dumpHex();
SkDebugf("fill:\n");
fill.dumpHex();
}
bestTan = SkTMax(bestTan, gMaxRecursion[0]);
bestCubic = SkTMax(bestCubic, gMaxRecursion[1]);
}
#endif
if (FLAGS_timeout && SkTime::GetMSecs() > limit) {
return;
}
}
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (FLAGS_veryVerbose) {
SkDebugf("\n%s max tan=%d cubic=%d\n", __FUNCTION__, bestTan, bestCubic);
}
#endif
}
DEF_TEST(QuadStrokerConstrained, reporter) {
SkRandom r;
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
int best = 0;
sk_bzero(gMaxRecursion, sizeof(gMaxRecursion[0]) * 3);
#endif
SkMSec limit = SkTime::GetMSecs() + MS_TEST_DURATION;
for (int i = 0; i < 1000000; ++i) {
SkPath path, fill;
SkPoint quad[3];
quad[0].fX = r.nextRangeF(0, 500);
quad[0].fY = r.nextRangeF(0, 500);
const SkScalar halfSquared = 0.5f * 0.5f;
do {
quad[1].fX = r.nextRangeF(0, 500);
quad[1].fY = r.nextRangeF(0, 500);
} while (quad[0].distanceToSqd(quad[1]) < halfSquared);
do {
quad[2].fX = r.nextRangeF(0, 500);
quad[2].fY = r.nextRangeF(0, 500);
} while (quad[0].distanceToSqd(quad[2]) < halfSquared
|| quad[1].distanceToSqd(quad[2]) < halfSquared);
path.moveTo(quad[0].fX, quad[0].fY);
path.quadTo(quad[1].fX, quad[1].fY, quad[2].fX, quad[2].fY);
p.setStrokeWidth(r.nextRangeF(0, 500));
p.getFillPath(path, &fill);
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (best < gMaxRecursion[2]) {
if (FLAGS_veryVerbose) {
SkDebugf("\n%s quad=%d width=%1.9g\n", __FUNCTION__, gMaxRecursion[2],
p.getStrokeWidth());
path.dumpHex();
SkDebugf("fill:\n");
fill.dumpHex();
}
best = gMaxRecursion[2];
}
#endif
if (FLAGS_timeout && SkTime::GetMSecs() > limit) {
return;
}
}
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (FLAGS_veryVerbose) {
SkDebugf("\n%s max quad=%d\n", __FUNCTION__, best);
}
#endif
}
DEF_TEST(CubicStrokerConstrained, reporter) {
SkRandom r;
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
int bestTan = 0;
int bestCubic = 0;
sk_bzero(gMaxRecursion, sizeof(gMaxRecursion[0]) * 3);
#endif
SkMSec limit = SkTime::GetMSecs() + MS_TEST_DURATION;
for (int i = 0; i < 1000000; ++i) {
SkPath path, fill;
SkPoint cubic[4];
cubic[0].fX = r.nextRangeF(0, 500);
cubic[0].fY = r.nextRangeF(0, 500);
const SkScalar halfSquared = 0.5f * 0.5f;
do {
cubic[1].fX = r.nextRangeF(0, 500);
cubic[1].fY = r.nextRangeF(0, 500);
} while (cubic[0].distanceToSqd(cubic[1]) < halfSquared);
do {
cubic[2].fX = r.nextRangeF(0, 500);
cubic[2].fY = r.nextRangeF(0, 500);
} while ( cubic[0].distanceToSqd(cubic[2]) < halfSquared
|| cubic[1].distanceToSqd(cubic[2]) < halfSquared);
do {
cubic[3].fX = r.nextRangeF(0, 500);
cubic[3].fY = r.nextRangeF(0, 500);
} while ( cubic[0].distanceToSqd(cubic[3]) < halfSquared
|| cubic[1].distanceToSqd(cubic[3]) < halfSquared
|| cubic[2].distanceToSqd(cubic[3]) < halfSquared);
path.moveTo(cubic[0].fX, cubic[0].fY);
path.cubicTo(cubic[1].fX, cubic[1].fY, cubic[2].fX, cubic[2].fY, cubic[3].fX, cubic[3].fY);
p.setStrokeWidth(r.nextRangeF(0, 500));
p.getFillPath(path, &fill);
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (bestTan < gMaxRecursion[0] || bestCubic < gMaxRecursion[1]) {
if (FLAGS_veryVerbose) {
SkDebugf("\n%s tan=%d cubic=%d width=%1.9g\n", __FUNCTION__, gMaxRecursion[0],
gMaxRecursion[1], p.getStrokeWidth());
path.dumpHex();
SkDebugf("fill:\n");
fill.dumpHex();
}
bestTan = SkTMax(bestTan, gMaxRecursion[0]);
bestCubic = SkTMax(bestCubic, gMaxRecursion[1]);
}
#endif
if (FLAGS_timeout && SkTime::GetMSecs() > limit) {
return;
}
}
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (FLAGS_veryVerbose) {
SkDebugf("\n%s max tan=%d cubic=%d\n", __FUNCTION__, bestTan, bestCubic);
}
#endif
}
DEF_TEST(QuadStrokerRange, reporter) {
SkRandom r;
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
int best = 0;
sk_bzero(gMaxRecursion, sizeof(gMaxRecursion[0]) * 3);
#endif
SkMSec limit = SkTime::GetMSecs() + MS_TEST_DURATION;
for (int i = 0; i < 1000000; ++i) {
SkPath path, fill;
SkPoint quad[3];
quad[0].fX = r.nextRangeF(0, 500);
quad[0].fY = r.nextRangeF(0, 500);
quad[1].fX = r.nextRangeF(0, 500);
quad[1].fY = r.nextRangeF(0, 500);
quad[2].fX = r.nextRangeF(0, 500);
quad[2].fY = r.nextRangeF(0, 500);
path.moveTo(quad[0].fX, quad[0].fY);
path.quadTo(quad[1].fX, quad[1].fY, quad[2].fX, quad[2].fY);
p.setStrokeWidth(r.nextRangeF(0, 500));
p.getFillPath(path, &fill);
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (best < gMaxRecursion[2]) {
if (FLAGS_veryVerbose) {
SkDebugf("\n%s quad=%d width=%1.9g\n", __FUNCTION__, gMaxRecursion[2],
p.getStrokeWidth());
path.dumpHex();
SkDebugf("fill:\n");
fill.dumpHex();
}
best = gMaxRecursion[2];
}
#endif
if (FLAGS_timeout && SkTime::GetMSecs() > limit) {
return;
}
}
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (FLAGS_verbose) {
SkDebugf("\n%s max quad=%d\n", __FUNCTION__, best);
}
#endif
}
DEF_TEST(CubicStrokerRange, reporter) {
SkRandom r;
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
int best[2] = { 0 };
sk_bzero(gMaxRecursion, sizeof(gMaxRecursion[0]) * 3);
#endif
SkMSec limit = SkTime::GetMSecs() + MS_TEST_DURATION;
for (int i = 0; i < 1000000; ++i) {
SkPath path, fill;
path.moveTo(r.nextRangeF(0, 500), r.nextRangeF(0, 500));
path.cubicTo(r.nextRangeF(0, 500), r.nextRangeF(0, 500), r.nextRangeF(0, 500),
r.nextRangeF(0, 500), r.nextRangeF(0, 500), r.nextRangeF(0, 500));
p.setStrokeWidth(r.nextRangeF(0, 100));
p.getFillPath(path, &fill);
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (best[0] < gMaxRecursion[0] || best[1] < gMaxRecursion[1]) {
if (FLAGS_veryVerbose) {
SkDebugf("\n%s tan=%d cubic=%d width=%1.9g\n", __FUNCTION__, gMaxRecursion[0],
gMaxRecursion[1], p.getStrokeWidth());
path.dumpHex();
SkDebugf("fill:\n");
fill.dumpHex();
}
best[0] = SkTMax(best[0], gMaxRecursion[0]);
best[1] = SkTMax(best[1], gMaxRecursion[1]);
}
#endif
if (FLAGS_timeout && SkTime::GetMSecs() > limit) {
return;
}
}
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (FLAGS_veryVerbose) {
SkDebugf("\n%s max tan=%d cubic=%d\n", __FUNCTION__, best[0], best[1]);
}
#endif
}
DEF_TEST(QuadStrokerOneOff, reporter) {
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
sk_bzero(gMaxRecursion, sizeof(gMaxRecursion[0]) * 3);
#endif
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SkDoubleToScalar(164.683548));
SkPath path, fill;
path.moveTo(SkBits2Float(0x43c99223), SkBits2Float(0x42b7417e));
path.quadTo(SkBits2Float(0x4285d839), SkBits2Float(0x43ed6645), SkBits2Float(0x43c941c8), SkBits2Float(0x42b3ace3));
p.getFillPath(path, &fill);
if (FLAGS_veryVerbose) {
SkDebugf("\n%s path\n", __FUNCTION__);
path.dump();
SkDebugf("fill:\n");
fill.dump();
}
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (FLAGS_veryVerbose) {
SkDebugf("max quad=%d\n", gMaxRecursion[2]);
}
#endif
}
DEF_TEST(CubicStrokerOneOff, reporter) {
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
sk_bzero(gMaxRecursion, sizeof(gMaxRecursion[0]) * 3);
#endif
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SkDoubleToScalar(42.835968));
SkPath path, fill;
path.moveTo(SkBits2Float(0x433f5370), SkBits2Float(0x43d1f4b3));
path.cubicTo(SkBits2Float(0x4331cb76), SkBits2Float(0x43ea3340), SkBits2Float(0x4388f498), SkBits2Float(0x42f7f08d), SkBits2Float(0x43f1cd32), SkBits2Float(0x42802ec1));
p.getFillPath(path, &fill);
if (FLAGS_veryVerbose) {
SkDebugf("\n%s path\n", __FUNCTION__);
path.dump();
SkDebugf("fill:\n");
fill.dump();
}
#if defined(SK_DEBUG) && QUAD_STROKE_APPROXIMATION
if (FLAGS_veryVerbose) {
SkDebugf("max tan=%d cubic=%d\n", gMaxRecursion[0], gMaxRecursion[1]);
}
#endif
}
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