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skia2/tests/PathOpsCubicIntersectionTestData.cpp
caryclark a35ab3e6e0 fix fuzzers 
Many old pathops-related fuzz failures have built up while
the codebase was under a state a flux. Now that the code
is stable, address these failures.

Most of the CL plumbs the debug global state to downstream
routines so that, if the data is not trusted (ala fuzzed)
the function can safely exit without asserting.

TBR=reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2426173002

Review-Url: https://chromiumcodereview.appspot.com/2426173002
2016-10-20 08:32:18 -07:00

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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "PathOpsCubicIntersectionTestData.h"
#include <limits>
static const double D = FLT_EPSILON / 2;
static const double G = FLT_EPSILON / 3;
static const double N = -FLT_EPSILON / 2;
static const double M = -FLT_EPSILON / 3;
const CubicPts pointDegenerates[] = {
{{{0, 0}, {0, 0}, {0, 0}, {0, 0}}},
{{{1, 1}, {1, 1}, {1, 1}, {1, 1}}},
{{{1 + FLT_EPSILON_HALF, 1}, {1, 1 + FLT_EPSILON_HALF}, {1, 1}, {1, 1}}},
{{{1 + D, 1}, {1 - D, 1}, {1, 1}, {1, 1}}},
{{{0, 0}, {0, 0}, {1, 0}, {0, 0}}},
{{{0, 0}, {1, 0}, {0, 0}, {0, 0}}},
{{{0, 0}, {0, 0}, {0, 1}, {0, 0}}},
{{{0, 0}, {0, 1}, {0, 0}, {0, 0}}},
{{{0, 0}, {0, 0}, {1, 1}, {0, 0}}},
{{{0, 0}, {1, 1}, {0, 0}, {0, 0}}},
{{{0, 0}, {1, 1}, {2, 2}, {0, 0}}},
{{{1, 1}, {2, 2}, {2, 2}, {1, 1}}},
{{{0, 0}, {0, D}, {1, 0}, {0, 0}}},
{{{0, 0}, {1, 0}, {0, D}, {0, 0}}},
{{{0, 0}, {D, 0}, {0, 1}, {0, 0}}},
{{{0, 0}, {0, 1}, {D, 0}, {0, 0}}},
{{{1, 1}, {2, 2}, {2, 2+D}, {1, 1}}},
{{{0, 0}, {0, N}, {1, 0}, {0, 0}}},
{{{0, 0}, {1, 0}, {0, N}, {0, 0}}},
{{{0, 0}, {N, 0}, {0, 1}, {0, 0}}},
{{{0, 0}, {0, 1}, {N, 0}, {0, 0}}},
{{{0, 0}, {1, 1}, {N, 0}, {0, 0}}},
{{{0, 0}, {D, 0}, {1, 1}, {0, 0}}},
{{{0, 0}, {1, 1}, {D, 0}, {0, 0}}},
{{{0, 0}, {N, 0}, {1, 1}, {0, 0}}},
{{{1, 1}, {2, 2}, {2, 2+N}, {1, 1}}},
};
const size_t pointDegenerates_count = SK_ARRAY_COUNT(pointDegenerates);
const CubicPts notPointDegenerates[] = {
{{{1 + FLT_EPSILON * 8, 1}, {1, FLT_EPSILON * 8}, {1, 1}, {1, 1}}},
{{{1 + FLT_EPSILON * 8, 1}, {1 - FLT_EPSILON * 8, 1}, {1, 1}, {1, 1}}}
};
const size_t notPointDegenerates_count =
SK_ARRAY_COUNT(notPointDegenerates);
// from http://www.truetex.com/bezint.htm
const CubicPts tests[][2] = {
{ // intersects in one place (data gives bezier clip fits
{{{0, 45},
{6.0094158284751593, 51.610357411322688},
{12.741093228940867, 55.981703949474607},
{20.021417396476362, 58.652245509710262}}},
{{{2.2070737699246674, 52.703494107327209},
{31.591482272629477, 23.811002295222025},
{76.824588616426425, 44.049473790502674},
{119.25488947221436, 55.599248272955073}}}
}, { // intersects in three places
{{{0, 45}, {50, 100}, {150, 0}, {200, 55}}},
{{{0, 55}, {50, 0}, {150, 100}, {200, 45}}}
}, { // intersects in one place, cross over is nearly parallel
{{{0, 0}, {0, 100}, {200, 0}, {200, 100}}},
{{{0, 100}, {0, 0}, {200, 100}, {200, 0}}}
}, { // intersects in two places
{{{0, 0}, {0, 100}, {200, 100}, {200, 0}}},
{{{0, 100}, {0, 0}, {200, 0}, {200, 100}}}
}, {
{{{150, 100}, {150 + 0.1, 150}, {150, 200}, {150, 250}}},
{{{250, 150}, {200, 150 + 0.1}, {150, 150}, {100, 150}}}
}, { // single intersection around 168,185
{{{200, 100}, {150, 100}, {150, 150}, {200, 150}}},
{{{250, 150}, {250, 100}, {100, 100}, {100, 150}}}
}, {
{{{1.0, 1.5}, {15.5, 0.5}, {-8.0, 3.5}, {5.0, 1.5}}},
{{{4.0, 0.5}, {5.0, 15.0}, {2.0, -8.5}, {4.0, 4.5}}}
}, {
{{{664.00168, 0}, {726.11545, 124.22757}, {736.89069, 267.89743},
{694.0017, 400.0002}}},
{{{850.66843, 115.55563}, {728.515, 115.55563}, {725.21347, 275.15309},
{694.0017, 400.0002}}}
}, {
{{{1, 1}, {12.5, 6.5}, {-4, 6.5}, {7.5, 1}}},
{{{1, 6.5}, {12.5, 1}, {-4, 1}, {.5, 6}}}
}, {
{{{315.748, 312.84}, {312.644, 318.134}, {305.836, 319.909}, {300.542, 316.804}}},
{{{317.122, 309.05}, {316.112, 315.102}, {310.385, 319.19}, {304.332, 318.179}}}
}, {
{{{1046.604051, 172.937967}, {1046.604051, 178.9763059}, {1041.76745, 183.9279165}, {1035.703842, 184.0432409}}},
{{{1046.452235, 174.7640504}, {1045.544872, 180.1973817}, {1040.837966, 184.0469882}, {1035.505925, 184.0469882}}}
}, {
{{{125.79356, 199.57382}, {51.16556, 128.93575}, {87.494, 16.67848}, {167.29361, 16.67848}}},
{{{167.29361, 55.81876}, {100.36128, 55.81876}, {68.64099, 145.4755}, {125.7942, 199.57309}}}
}, {
{{{104.11546583642826, 370.21352558595504}, {122.96968232592344, 404.54489231839295},
{169.90881005384728, 425.00067000000007}, {221.33045999999999, 425.00067000000001}}},
{{{116.32365976159625, 381.71048540582598}, {103.86096590870899, 381.71048540581626},
{91.394188003200725, 377.17917781762833}, {82.622283093355179, 368.11683661930334}}}
}
};
const size_t tests_count = SK_ARRAY_COUNT(tests);
const CubicPts lines[] = {
{{{0, 0}, {0, 0}, {0, 0}, {1, 0}}}, // 0: horizontal
{{{1, 0}, {0, 0}, {0, 0}, {0, 0}}},
{{{1, 0}, {2, 0}, {3, 0}, {4, 0}}},
{{{0, 0}, {0, 0}, {0, 0}, {0, 1}}}, // 5: vertical
{{{0, 1}, {0, 0}, {0, 0}, {0, 0}}},
{{{0, 1}, {0, 2}, {0, 3}, {0, 4}}},
{{{0, 0}, {0, 0}, {0, 0}, {1, 1}}}, // 10: 3 coincident
{{{1, 1}, {0, 0}, {0, 0}, {0, 0}}},
{{{0, 0}, {0, 0}, {1, 1}, {2, 2}}}, // 14: 2 coincident
{{{0, 0}, {1, 1}, {0, 0}, {2, 2}}},
{{{1, 1}, {0, 0}, {0, 0}, {2, 2}}}, // 17:
{{{1, 1}, {0, 0}, {2, 2}, {0, 0}}},
{{{1, 1}, {2, 2}, {0, 0}, {0, 0}}},
{{{1, 1}, {2, 2}, {3, 3}, {2, 2}}}, // middle-last coincident
{{{1, 1}, {2, 2}, {3, 3}, {3, 3}}}, // middle-last coincident
{{{1, 1}, {1, 1}, {2, 2}, {2, 2}}}, // 2 pairs coincident
{{{1, 1}, {2, 2}, {1, 1}, {2, 2}}},
{{{1, 1}, {1, 1}, {3, 3}, {3, 3}}}, // first-middle middle-last coincident
{{{1, 1}, {2, 2}, {3, 3}, {4, 4}}}, // no coincident
{{{1, 1}, {3, 3}, {2, 2}, {4, 4}}},
{{{1, 1}, {2, 2}, {4, 4}, {3, 3}}},
{{{1, 1}, {3, 3}, {4, 4}, {2, 2}}},
{{{1, 1}, {4, 4}, {2, 2}, {3, 3}}},
{{{1, 1}, {4, 4}, {3, 3}, {2, 2}}},
{{{2, 2}, {1, 1}, {3, 3}, {4, 4}}},
{{{2, 2}, {1, 1}, {4, 4}, {3, 3}}},
{{{2, 2}, {3, 3}, {1, 1}, {4, 4}}},
{{{2, 2}, {3, 3}, {4, 4}, {1, 1}}},
{{{2, 2}, {4, 4}, {1, 1}, {3, 3}}},
{{{2, 2}, {4, 4}, {3, 3}, {1, 1}}},
};
const size_t lines_count = SK_ARRAY_COUNT(lines);
// 'not a line' tries to fool the line detection code
const CubicPts notLines[] = {
{{{0, 0}, {0, 0}, {0, 1}, {1, 0}}},
{{{0, 0}, {0, 1}, {0, 0}, {1, 0}}},
{{{0, 0}, {0, 1}, {1, 0}, {0, 0}}},
{{{0, 1}, {0, 0}, {0, 0}, {1, 0}}},
{{{0, 1}, {0, 0}, {1, 0}, {0, 0}}},
{{{0, 1}, {1, 0}, {0, 0}, {0, 0}}},
};
const size_t notLines_count = SK_ARRAY_COUNT(notLines);
static const double E = FLT_EPSILON * 8;
static const double F = FLT_EPSILON * 8;
const CubicPts modEpsilonLines[] = {
{{{0, E}, {0, 0}, {0, 0}, {1, 0}}}, // horizontal
{{{0, 0}, {0, E}, {1, 0}, {0, 0}}},
{{{0, 0}, {1, 0}, {0, E}, {0, 0}}},
{{{1, 0}, {0, 0}, {0, 0}, {0, E}}},
{{{1, E}, {2, 0}, {3, 0}, {4, 0}}},
{{{E, 0}, {0, 0}, {0, 0}, {0, 1}}}, // vertical
{{{0, 0}, {E, 0}, {0, 1}, {0, 0}}},
{{{0, 0}, {0, 1}, {E, 0}, {0, 0}}},
{{{0, 1}, {0, 0}, {0, 0}, {E, 0}}},
{{{E, 1}, {0, 2}, {0, 3}, {0, 4}}},
{{{E, 0}, {0, 0}, {0, 0}, {1, 1}}}, // 3 coincident
{{{0, 0}, {E, 0}, {1, 1}, {0, 0}}},
{{{0, 0}, {1, 1}, {E, 0}, {0, 0}}},
{{{1, 1}, {0, 0}, {0, 0}, {E, 0}}},
{{{0, E}, {0, 0}, {1, 1}, {2, 2}}}, // 2 coincident
{{{0, 0}, {1, 1}, {0, E}, {2, 2}}},
{{{0, 0}, {1, 1}, {2, 2}, {0, E}}},
{{{1, 1}, {0, E}, {0, 0}, {2, 2}}},
{{{1, 1}, {0, E}, {2, 2}, {0, 0}}},
{{{1, 1}, {2, 2}, {E, 0}, {0, 0}}},
{{{1, 1}, {2, 2+E}, {3, 3}, {2, 2}}}, // middle-last coincident
{{{1, 1}, {2+E, 2}, {3, 3}, {3, 3}}}, // middle-last coincident
{{{1, 1}, {1, 1}, {2, 2}, {2+E, 2}}}, // 2 pairs coincident
{{{1, 1}, {2, 2}, {1, 1}, {2+E, 2}}},
{{{1, 1}, {2, 2}, {2, 2+E}, {1, 1}}},
{{{1, 1}, {1, 1+E}, {3, 3}, {3, 3}}}, // first-middle middle-last coincident
{{{1, 1}, {2+E, 2}, {3, 3}, {4, 4}}}, // no coincident
{{{1, 1}, {3, 3}, {2, 2}, {4, 4+F+F}}}, // INVESTIGATE: why the epsilon is bigger
{{{1, 1+F+F}, {2, 2}, {4, 4}, {3, 3}}}, // INVESTIGATE: why the epsilon is bigger
{{{1, 1}, {3, 3}, {4, 4+E}, {2, 2}}},
{{{1, 1}, {4, 4}, {2, 2}, {3, 3+E}}},
{{{1, 1}, {4, 4}, {3, 3}, {2+E, 2}}},
{{{2, 2}, {1, 1}, {3+E, 3}, {4, 4}}},
{{{2, 2}, {1+E, 1}, {4, 4}, {3, 3}}},
{{{2, 2+E}, {3, 3}, {1, 1}, {4, 4}}},
{{{2+E, 2}, {3, 3}, {4, 4}, {1, 1}}},
{{{2, 2}, {4+E, 4}, {1, 1}, {3, 3}}},
{{{2, 2}, {4, 4}, {3, 3}, {1, 1+E}}},
};
const size_t modEpsilonLines_count = SK_ARRAY_COUNT(modEpsilonLines);
const CubicPts lessEpsilonLines[] = {
{{{0, D}, {0, 0}, {0, 0}, {1, 0}}}, // horizontal
{{{1, 0}, {0, 0}, {0, 0}, {0, D}}},
{{{1, D}, {2, 0}, {3, 0}, {4, 0}}},
{{{D, 0}, {0, 0}, {0, 0}, {0, 1}}}, // vertical
{{{0, 1}, {0, 0}, {0, 0}, {D, 0}}},
{{{D, 1}, {0, 2}, {0, 3}, {0, 4}}},
{{{D, 0}, {0, 0}, {0, 0}, {1, 1}}}, // 3 coincident
{{{1, 1}, {0, 0}, {0, 0}, {D, 0}}},
{{{0, D}, {0, 0}, {1, 1}, {2, 2}}}, // 2 coincident
{{{0, 0}, {1, 1}, {0, D}, {2, 2}}},
{{{0, 0}, {1, 1}, {2, 2}, {1, 1+D}}},
{{{1, 1}, {0, D}, {0, 0}, {2, 2}}},
{{{1, 1}, {0, D}, {2, 2}, {0, 0}}},
{{{1, 1}, {2, 2}, {D, 0}, {0, 0}}},
{{{1, 1}, {2, 2+D}, {3, 3}, {2, 2}}}, // middle-last coincident
{{{1, 1}, {2+D, 2}, {3, 3}, {3, 3}}}, // middle-last coincident
{{{1, 1}, {1, 1}, {2, 2}, {2+D, 2}}}, // 2 pairs coincident
{{{1, 1}, {2, 2}, {1, 1}, {2+D, 2}}},
{{{1, 1}, {1, 1+D}, {3, 3}, {3, 3}}}, // first-middle middle-last coincident
{{{1, 1}, {2+D/2, 2}, {3, 3}, {4, 4}}}, // no coincident (FIXME: N as opposed to N/2 failed)
{{{1, 1}, {3, 3}, {2, 2}, {4, 4+D}}},
{{{1, 1+D}, {2, 2}, {4, 4}, {3, 3}}},
{{{1, 1}, {3, 3}, {4, 4+D}, {2, 2}}},
{{{1, 1}, {4, 4}, {2, 2}, {3, 3+D}}},
{{{1, 1}, {4, 4}, {3, 3}, {2+G, 2}}}, // INVESTIGATE: why the epsilon is smaller
{{{2, 2}, {1, 1}, {3+D, 3}, {4, 4}}},
{{{2, 2}, {1+D, 1}, {4, 4}, {3, 3}}},
{{{2, 2+D}, {3, 3}, {1, 1}, {4, 4}}},
{{{2+G, 2}, {3, 3}, {4, 4}, {1, 1}}}, // INVESTIGATE: why the epsilon is smaller
{{{2, 2}, {4+D, 4}, {1, 1}, {3, 3}}},
{{{2, 2}, {4, 4}, {3, 3}, {1, 1+D}}},
};
const size_t lessEpsilonLines_count = SK_ARRAY_COUNT(lessEpsilonLines);
const CubicPts negEpsilonLines[] = {
{{{0, N}, {0, 0}, {0, 0}, {1, 0}}}, // horizontal
{{{1, 0}, {0, 0}, {0, 0}, {0, N}}},
{{{1, N}, {2, 0}, {3, 0}, {4, 0}}},
{{{N, 0}, {0, 0}, {0, 0}, {0, 1}}}, // vertical
{{{0, 1}, {0, 0}, {0, 0}, {N, 0}}},
{{{N, 1}, {0, 2}, {0, 3}, {0, 4}}},
{{{N, 0}, {0, 0}, {0, 0}, {1, 1}}}, // 3 coincident
{{{1, 1}, {0, 0}, {0, 0}, {N, 0}}},
{{{0, N}, {0, 0}, {1, 1}, {2, 2}}}, // 2 coincident
{{{0, 0}, {1, 1}, {0, N}, {2, 2}}},
{{{0, 0}, {1, 1}, {2, 2}, {1, 1+N}}},
{{{1, 1}, {0, N}, {0, 0}, {2, 2}}},
{{{1, 1}, {0, N}, {2, 2}, {0, 0}}},
{{{1, 1}, {2, 2}, {N, 0}, {0, 0}}},
{{{1, 1}, {2, 2+N}, {3, 3}, {2, 2}}}, // middle-last coincident
{{{1, 1}, {2+N, 2}, {3, 3}, {3, 3}}}, // middle-last coincident
{{{1, 1}, {1, 1}, {2, 2}, {2+N, 2}}}, // 2 pairs coincident
{{{1, 1}, {2, 2}, {1, 1}, {2+N, 2}}},
{{{1, 1}, {1, 1+N}, {3, 3}, {3, 3}}}, // first-middle middle-last coincident
{{{1, 1}, {2+N/2, 2}, {3, 3}, {4, 4}}}, // no coincident (FIXME: N as opposed to N/2 failed)
{{{1, 1}, {3, 3}, {2, 2}, {4, 4+N}}},
{{{1, 1+N}, {2, 2}, {4, 4}, {3, 3}}},
{{{1, 1}, {3, 3}, {4, 4+N}, {2, 2}}},
{{{1, 1}, {4, 4}, {2, 2}, {3, 3+N}}},
{{{1, 1}, {4, 4}, {3, 3}, {2+M, 2}}}, // INVESTIGATE: why the epsilon is smaller
{{{2, 2}, {1, 1}, {3+N, 3}, {4, 4}}},
{{{2, 2}, {1+N, 1}, {4, 4}, {3, 3}}},
{{{2, 2+N}, {3, 3}, {1, 1}, {4, 4}}},
{{{2+M, 2}, {3, 3}, {4, 4}, {1, 1}}}, // INVESTIGATE: why the epsilon is smaller
{{{2, 2}, {4+N, 4}, {1, 1}, {3, 3}}},
{{{2, 2}, {4, 4}, {3, 3}, {1, 1+N}}},
};
const size_t negEpsilonLines_count = SK_ARRAY_COUNT(negEpsilonLines);
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