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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "PathOpsTestCommon.h"
#include "SkGeometry.h"
#include "SkIntersections.h"
#include "Test.h"
/*
manually compute the intersection of a pair of circles and see if the conic intersection matches
given two circles
construct a line connecting their centers
*/
static const SkDConic testSet[] = {
{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
{{{{5.1114602088928223, 628.77813720703125},
{10.834027290344238, 988.964111328125},
{163.40835571289062, 988.964111328125}}}, 0.72944212f},
{{{{163.40835571289062, 988.964111328125},
{5, 988.964111328125},
{5, 614.7423095703125}}}, 0.707106769f},
{{{{11.17222976684570312, -8.103978157043457031},
{22.91432571411132812, -10.37866020202636719},
{23.7764129638671875, -7.725424289703369141}}}, 1.00862849f},
{{{{-1.545085430145263672, -4.755282402038574219},
{22.23132705688476562, -12.48070907592773438},
{23.7764129638671875, -7.725427150726318359}}}, 0.707106769f},
{{{{-4,1}, {-4,5}, {0,5}}}, 0.707106769f},
{{{{-3,4}, {-3,1}, {0,1}}}, 0.707106769f},
{{{{0, 0}, {0, 1}, {1, 1}}}, 0.5f},
{{{{1, 0}, {0, 0}, {0, 1}}}, 0.5f},
};
const int testSetCount = (int) SK_ARRAY_COUNT(testSet);
static void chopCompare(const SkConic chopped[2], const SkDConic dChopped[2]) {
SkASSERT(roughly_equal(chopped[0].fW, dChopped[0].fWeight));
SkASSERT(roughly_equal(chopped[1].fW, dChopped[1].fWeight));
for (int cIndex = 0; cIndex < 2; ++cIndex) {
for (int pIndex = 0; pIndex < 3; ++pIndex) {
SkDPoint up;
up.set(chopped[cIndex].fPts[pIndex]);
SkASSERT(dChopped[cIndex].fPts[pIndex].approximatelyEqual(up));
}
}
#if DEBUG_VISUALIZE_CONICS
dChopped[0].dump();
dChopped[1].dump();
#endif
}
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkImageEncoder.h"
#include "SkPathOpsRect.h"
#include "SkPaint.h"
#include "SkString.h"
#define DEBUG_VISUALIZE_CONICS 0
#if DEBUG_VISUALIZE_CONICS
static void writePng(const SkConic& c, const SkConic ch[2], const char* name) {
const int scale = 10;
SkConic conic, chopped[2];
for (int index = 0; index < 3; ++index) {
conic.fPts[index].fX = c.fPts[index].fX * scale;
conic.fPts[index].fY = c.fPts[index].fY * scale;
for (int chIndex = 0; chIndex < 2; ++chIndex) {
chopped[chIndex].fPts[index].fX = ch[chIndex].fPts[index].fX * scale;
chopped[chIndex].fPts[index].fY = ch[chIndex].fPts[index].fY * scale;
}
}
conic.fW = c.fW;
chopped[0].fW = ch[0].fW;
chopped[1].fW = ch[1].fW;
SkBitmap bitmap;
SkRect bounds;
conic.computeTightBounds(&bounds);
bounds.outset(10, 10);
bitmap.tryAllocPixels(SkImageInfo::MakeN32Premul(
SkScalarRoundToInt(bounds.width()), SkScalarRoundToInt(bounds.height())));
SkCanvas canvas(bitmap);
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
canvas.translate(-bounds.fLeft, -bounds.fTop);
canvas.drawColor(SK_ColorWHITE);
SkPath path;
path.moveTo(conic.fPts[0]);
path.conicTo(conic.fPts[1], conic.fPts[2], conic.fW);
paint.setARGB(0x80, 0xFF, 0, 0);
canvas.drawPath(path, paint);
path.reset();
path.moveTo(chopped[0].fPts[0]);
path.conicTo(chopped[0].fPts[1], chopped[0].fPts[2], chopped[0].fW);
path.moveTo(chopped[1].fPts[0]);
path.conicTo(chopped[1].fPts[1], chopped[1].fPts[2], chopped[1].fW);
paint.setARGB(0x80, 0, 0, 0xFF);
canvas.drawPath(path, paint);
SkString filename("c:\\Users\\caryclark\\Documents\\");
filename.appendf("%s.png", name);
SkImageEncoder::EncodeFile(filename.c_str(), bitmap,
SkImageEncoder::kPNG_Type, 100);
}
static void writeDPng(const SkDConic& dC, const char* name) {
const int scale = 5;
SkDConic dConic = {{{ {dC.fPts[0].fX * scale, dC.fPts[0].fY * scale },
{dC.fPts[1].fX * scale, dC.fPts[1].fY * scale },
{dC.fPts[2].fX * scale, dC.fPts[2].fY * scale }}}, dC.fWeight };
SkBitmap bitmap;
SkDRect bounds;
bounds.setBounds(dConic);
bounds.fLeft -= 10;
bounds.fTop -= 10;
bounds.fRight += 10;
bounds.fBottom += 10;
bitmap.tryAllocPixels(SkImageInfo::MakeN32Premul(
SkScalarRoundToInt(SkDoubleToScalar(bounds.width())),
SkScalarRoundToInt(SkDoubleToScalar(bounds.height()))));
SkCanvas canvas(bitmap);
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
canvas.translate(SkDoubleToScalar(-bounds.fLeft), SkDoubleToScalar(-bounds.fTop));
canvas.drawColor(SK_ColorWHITE);
SkPath path;
path.moveTo(dConic.fPts[0].asSkPoint());
path.conicTo(dConic.fPts[1].asSkPoint(), dConic.fPts[2].asSkPoint(), dConic.fWeight);
paint.setARGB(0x80, 0xFF, 0, 0);
canvas.drawPath(path, paint);
path.reset();
const int chops = 2;
for (int tIndex = 0; tIndex < chops; ++tIndex) {
SkDConic chopped = dConic.subDivide(tIndex / (double) chops,
(tIndex + 1) / (double) chops);
path.moveTo(chopped.fPts[0].asSkPoint());
path.conicTo(chopped.fPts[1].asSkPoint(), chopped.fPts[2].asSkPoint(), chopped.fWeight);
}
paint.setARGB(0x80, 0, 0, 0xFF);
canvas.drawPath(path, paint);
SkString filename("c:\\Users\\caryclark\\Documents\\");
filename.appendf("%s.png", name);
SkImageEncoder::EncodeFile(filename.c_str(), bitmap,
SkImageEncoder::kPNG_Type, 100);
}
#endif
static void chopBothWays(const SkDConic& dConic, double t, const char* name) {
SkConic conic;
for (int index = 0; index < 3; ++index) {
conic.fPts[index] = dConic.fPts[index].asSkPoint();
}
conic.fW = dConic.fWeight;
SkConic chopped[2];
SkDConic dChopped[2];
conic.chopAt(SkDoubleToScalar(t), chopped);
dChopped[0] = dConic.subDivide(0, t);
dChopped[1] = dConic.subDivide(t, 1);
#if DEBUG_VISUALIZE_CONICS
dConic.dump();
#endif
chopCompare(chopped, dChopped);
#if DEBUG_VISUALIZE_CONICS
writePng(conic, chopped, name);
#endif
}
#if DEBUG_VISUALIZE_CONICS
const SkDConic frame0[] = {
{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
};
const SkDConic frame1[] = {
{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
{{{{306.58801299999999, -227.983994}, {212.46499600000001, -262.24200400000001}, {95.551200899999998, 58.976398500000002}}}, 0.707107008f},
{{{{377.21899400000001, -141.98100299999999}, {237.77799285476553, -166.56830755921084}, {134.08399674208422, -155.06258330544892}}}, 0.788580656f},
{{{{134.08399674208422, -155.06258330544892}, {30.390000629402859, -143.55685905168704}, {23.185499199999999, -102.697998}}}, 0.923879623f},
};
const SkDConic frame2[] = {
{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
{{{{205.78973252799028, -158.12538713371103}, {143.97848953841861, -74.076645245042371}, {95.551200899999998, 58.976398500000002}}}, 0.923879623f},
{{{{377.21899400000001, -141.98100299999999}, {237.77799285476553, -166.56830755921084}, {134.08399674208422, -155.06258330544892}}}, 0.788580656f},
};
const SkDConic frame3[] = {
{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
{{{{205.78973252799028, -158.12538713371103}, {143.97848953841861, -74.076645245042371}, {95.551200899999998, 58.976398500000002}}}, 0.923879623f},
{{{{252.08225670812539, -156.90491625851064}, {185.93099479842493, -160.81544543232982}, {134.08399674208422, -155.06258330544892}}}, 0.835816324f},
};
const SkDConic frame4[] = {
{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
{{{{205.78973252799028, -158.12538713371103}, {174.88411103320448, -116.10101618937664}, {145.19509369736275, -56.857102571363754}}}, 0.871667147f},
{{{{252.08225670812539, -156.90491625851064}, {185.93099479842493, -160.81544543232982}, {134.08399674208422, -155.06258330544892}}}, 0.835816324f},
};
const SkDConic frame5[] = {
{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
{{{{205.78973252799028, -158.12538713371103}, {174.88411103320448, -116.10101618937664}, {145.19509369736275, -56.857102571363754}}}, 0.871667147f},
{{{{252.08225670812539, -156.90491625851064}, {219.70109133058406, -158.81912754088933}, {190.17095392508796, -158.38373974664466}}}, 0.858306944f},
};
const SkDConic frame6[] = {
{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
{{{{205.78973252799028, -158.12538713371103}, {190.33692178059735, -137.11320166154385}, {174.87004877564593, -111.2132534799228}}}, 0.858117759f},
{{{{252.08225670812539, -156.90491625851064}, {219.70109133058406, -158.81912754088933}, {190.17095392508796, -158.38373974664466}}}, 0.858306944f},
};
const SkDConic* frames[] = {
frame0, frame1, frame2, frame3, frame4, frame5, frame6
};
const int frameSizes[] = { (int) SK_ARRAY_COUNT(frame0), (int) SK_ARRAY_COUNT(frame1),
(int) SK_ARRAY_COUNT(frame2), (int) SK_ARRAY_COUNT(frame3),
(int) SK_ARRAY_COUNT(frame4), (int) SK_ARRAY_COUNT(frame5),
(int) SK_ARRAY_COUNT(frame6),
};
static void writeFrames() {
const int scale = 5;
for (int index = 0; index < (int) SK_ARRAY_COUNT(frameSizes); ++index) {
SkDRect bounds;
bool boundsSet = false;
int frameSize = frameSizes[index];
for (int fIndex = 0; fIndex < frameSize; ++fIndex) {
const SkDConic& dC = frames[index][fIndex];
SkDConic dConic = {{{ {dC.fPts[0].fX * scale, dC.fPts[0].fY * scale },
{dC.fPts[1].fX * scale, dC.fPts[1].fY * scale },
{dC.fPts[2].fX * scale, dC.fPts[2].fY * scale }}}, dC.fWeight };
SkDRect dBounds;
dBounds.setBounds(dConic);
if (!boundsSet) {
bounds = dBounds;
boundsSet = true;
} else {
bounds.add((SkDPoint&) dBounds.fLeft);
bounds.add((SkDPoint&) dBounds.fRight);
}
}
bounds.fLeft -= 10;
bounds.fTop -= 10;
bounds.fRight += 10;
bounds.fBottom += 10;
SkBitmap bitmap;
bitmap.tryAllocPixels(SkImageInfo::MakeN32Premul(
SkScalarRoundToInt(SkDoubleToScalar(bounds.width())),
SkScalarRoundToInt(SkDoubleToScalar(bounds.height()))));
SkCanvas canvas(bitmap);
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
canvas.translate(SkDoubleToScalar(-bounds.fLeft), SkDoubleToScalar(-bounds.fTop));
canvas.drawColor(SK_ColorWHITE);
for (int fIndex = 0; fIndex < frameSize; ++fIndex) {
const SkDConic& dC = frames[index][fIndex];
SkDConic dConic = {{{ {dC.fPts[0].fX * scale, dC.fPts[0].fY * scale },
{dC.fPts[1].fX * scale, dC.fPts[1].fY * scale },
{dC.fPts[2].fX * scale, dC.fPts[2].fY * scale }}}, dC.fWeight };
SkPath path;
path.moveTo(dConic.fPts[0].asSkPoint());
path.conicTo(dConic.fPts[1].asSkPoint(), dConic.fPts[2].asSkPoint(), dConic.fWeight);
if (fIndex < 2) {
paint.setARGB(0x80, 0xFF, 0, 0);
} else {
paint.setARGB(0x80, 0, 0, 0xFF);
}
canvas.drawPath(path, paint);
}
SkString filename("c:\\Users\\caryclark\\Documents\\");
filename.appendf("f%d.png", index);
SkImageEncoder::EncodeFile(filename.c_str(), bitmap, SkImageEncoder::kPNG_Type, 100);
}
}
#endif
static void oneOff(skiatest::Reporter* reporter, const SkDConic& c1, const SkDConic& c2,
bool coin) {
#if DEBUG_VISUALIZE_CONICS
writeFrames();
#endif
chopBothWays(c1, 0.5, "c1");
chopBothWays(c2, 0.5, "c2");
#if DEBUG_VISUALIZE_CONICS
writeDPng(c1, "d1");
writeDPng(c2, "d2");
#endif
SkASSERT(ValidConic(c1));
SkASSERT(ValidConic(c2));
SkIntersections intersections;
intersections.intersect(c1, c2);
if (coin && intersections.used() != 2) {
SkDebugf("");
}
REPORTER_ASSERT(reporter, !coin || intersections.used() == 2);
double tt1, tt2;
SkDPoint xy1, xy2;
for (int pt3 = 0; pt3 < intersections.used(); ++pt3) {
tt1 = intersections[0][pt3];
xy1 = c1.ptAtT(tt1);
tt2 = intersections[1][pt3];
xy2 = c2.ptAtT(tt2);
const SkDPoint& iPt = intersections.pt(pt3);
REPORTER_ASSERT(reporter, xy1.approximatelyEqual(iPt));
REPORTER_ASSERT(reporter, xy2.approximatelyEqual(iPt));
REPORTER_ASSERT(reporter, xy1.approximatelyEqual(xy2));
}
reporter->bumpTestCount();
}
static void oneOff(skiatest::Reporter* reporter, int outer, int inner) {
const SkDConic& c1 = testSet[outer];
const SkDConic& c2 = testSet[inner];
oneOff(reporter, c1, c2, false);
}
static void oneOffTests(skiatest::Reporter* reporter) {
for (int outer = 0; outer < testSetCount - 1; ++outer) {
for (int inner = outer + 1; inner < testSetCount; ++inner) {
oneOff(reporter, outer, inner);
}
}
}
DEF_TEST(PathOpsConicIntersectionOneOff, reporter) {
oneOff(reporter, 0, 1);
}
DEF_TEST(PathOpsConicIntersection, reporter) {
oneOffTests(reporter);
}
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