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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 "PathOpsExtendedTest.h"
#include "SkIntersections.h"
#include "SkPathOpsLine.h"
#include "SkPathOpsQuad.h"
#include "SkReduceOrder.h"
#include "Test.h"
static struct lineQuad {
SkDQuad quad;
SkDLine line;
int result;
SkDPoint expected[2];
} lineQuadTests[] = {
// quad line results
{{{{1, 1}, {2, 1}, {0, 2}}}, {{{0, 0}, {1, 1}}}, 1, {{1, 1}, {0, 0}} },
{{{{0, 0}, {1, 1}, {3, 1}}}, {{{0, 0}, {3, 1}}}, 2, {{0, 0}, {3, 1}} },
{{{{2, 0}, {1, 1}, {2, 2}}}, {{{0, 0}, {0, 2}}}, 0, {{0, 0}, {0, 0}} },
{{{{4, 0}, {0, 1}, {4, 2}}}, {{{3, 1}, {4, 1}}}, 0, {{0, 0}, {0, 0}} },
{{{{0, 0}, {0, 1}, {1, 1}}}, {{{0, 1}, {1, 0}}}, 1, {{.25, .75}, {0, 0}} },
};
static size_t lineQuadTests_count = SK_ARRAY_COUNT(lineQuadTests);
static int doIntersect(SkIntersections& intersections, const SkDQuad& quad, const SkDLine& line,
bool& flipped) {
int result;
flipped = false;
if (line[0].fX == line[1].fX) {
double top = line[0].fY;
double bottom = line[1].fY;
flipped = top > bottom;
if (flipped) {
SkTSwap<double>(top, bottom);
}
result = intersections.vertical(quad, top, bottom, line[0].fX, flipped);
} else if (line[0].fY == line[1].fY) {
double left = line[0].fX;
double right = line[1].fX;
flipped = left > right;
if (flipped) {
SkTSwap<double>(left, right);
}
result = intersections.horizontal(quad, left, right, line[0].fY, flipped);
} else {
intersections.intersect(quad, line);
result = intersections.used();
}
return result;
}
static struct oneLineQuad {
SkDQuad quad;
SkDLine line;
} oneOffs[] = {
{{{{369.848602, 145.680267}, {382.360413, 121.298294}, {406.207703, 121.298294}}},
{{{406.207703, 121.298294}, {348.781738, 123.864815}}}}
};
static size_t oneOffs_count = SK_ARRAY_COUNT(oneOffs);
static void testOneOffs(skiatest::Reporter* reporter) {
SkIntersections intersections;
bool flipped = false;
for (size_t index = 0; index < oneOffs_count; ++index) {
const SkDQuad& quad = oneOffs[index].quad;
const SkDLine& line = oneOffs[index].line;
int result = doIntersect(intersections, quad, line, flipped);
for (int inner = 0; inner < result; ++inner) {
double quadT = intersections[0][inner];
SkDPoint quadXY = quad.xyAtT(quadT);
double lineT = intersections[1][inner];
SkDPoint lineXY = line.xyAtT(lineT);
REPORTER_ASSERT(reporter, quadXY.approximatelyEqual(lineXY));
}
}
}
static void PathOpsQuadLineIntersectionTest(skiatest::Reporter* reporter) {
testOneOffs(reporter);
for (size_t index = 0; index < lineQuadTests_count; ++index) {
int iIndex = static_cast<int>(index);
const SkDQuad& quad = lineQuadTests[index].quad;
const SkDLine& line = lineQuadTests[index].line;
SkReduceOrder reducer1, reducer2;
int order1 = reducer1.reduce(quad, SkReduceOrder::kFill_Style);
int order2 = reducer2.reduce(line);
if (order1 < 3) {
SkDebugf("%s [%d] quad order=%d\n", __FUNCTION__, iIndex, order1);
REPORTER_ASSERT(reporter, 0);
}
if (order2 < 2) {
SkDebugf("%s [%d] line order=%d\n", __FUNCTION__, iIndex, order2);
REPORTER_ASSERT(reporter, 0);
}
SkIntersections intersections;
bool flipped = false;
int result = doIntersect(intersections, quad, line, flipped);
REPORTER_ASSERT(reporter, result == lineQuadTests[index].result);
if (intersections.used() <= 0) {
continue;
}
for (int pt = 0; pt < result; ++pt) {
double tt1 = intersections[0][pt];
REPORTER_ASSERT(reporter, tt1 >= 0 && tt1 <= 1);
SkDPoint t1 = quad.xyAtT(tt1);
double tt2 = intersections[1][pt];
REPORTER_ASSERT(reporter, tt2 >= 0 && tt2 <= 1);
SkDPoint t2 = line.xyAtT(tt2);
if (!t1.approximatelyEqual(t2)) {
SkDebugf("%s [%d,%d] x!= t1=%1.9g (%1.9g,%1.9g) t2=%1.9g (%1.9g,%1.9g)\n",
__FUNCTION__, iIndex, pt, tt1, t1.fX, t1.fY, tt2, t2.fX, t2.fY);
REPORTER_ASSERT(reporter, 0);
}
if (!t1.approximatelyEqual(lineQuadTests[index].expected[0])
&& (lineQuadTests[index].result == 1
|| !t1.approximatelyEqual(lineQuadTests[index].expected[1]))) {
SkDebugf("%s t1=(%1.9g,%1.9g)\n", __FUNCTION__, t1.fX, t1.fY);
REPORTER_ASSERT(reporter, 0);
}
}
}
}
#include "TestClassDef.h"
DEFINE_TESTCLASS_SHORT(PathOpsQuadLineIntersectionTest)
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