9d524f22bf
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1842753002 Review URL: https://codereview.chromium.org/1842753002
351 lines
14 KiB
C++
351 lines
14 KiB
C++
/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "PathOpsTestCommon.h"
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#include "SkGeometry.h"
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#include "SkIntersections.h"
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#include "Test.h"
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/*
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manually compute the intersection of a pair of circles and see if the conic intersection matches
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given two circles
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construct a line connecting their centers
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*/
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static const SkDConic testSet[] = {
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{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
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{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
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{{{{5.1114602088928223, 628.77813720703125},
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{10.834027290344238, 988.964111328125},
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{163.40835571289062, 988.964111328125}}}, 0.72944212f},
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{{{{163.40835571289062, 988.964111328125},
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{5, 988.964111328125},
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{5, 614.7423095703125}}}, 0.707106769f},
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{{{{11.17222976684570312, -8.103978157043457031},
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{22.91432571411132812, -10.37866020202636719},
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{23.7764129638671875, -7.725424289703369141}}}, 1.00862849f},
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{{{{-1.545085430145263672, -4.755282402038574219},
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{22.23132705688476562, -12.48070907592773438},
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{23.7764129638671875, -7.725427150726318359}}}, 0.707106769f},
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{{{{-4,1}, {-4,5}, {0,5}}}, 0.707106769f},
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{{{{-3,4}, {-3,1}, {0,1}}}, 0.707106769f},
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{{{{0, 0}, {0, 1}, {1, 1}}}, 0.5f},
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{{{{1, 0}, {0, 0}, {0, 1}}}, 0.5f},
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};
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const int testSetCount = (int) SK_ARRAY_COUNT(testSet);
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static void chopCompare(const SkConic chopped[2], const SkDConic dChopped[2]) {
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SkASSERT(roughly_equal(chopped[0].fW, dChopped[0].fWeight));
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SkASSERT(roughly_equal(chopped[1].fW, dChopped[1].fWeight));
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for (int cIndex = 0; cIndex < 2; ++cIndex) {
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for (int pIndex = 0; pIndex < 3; ++pIndex) {
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SkDPoint up;
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up.set(chopped[cIndex].fPts[pIndex]);
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SkASSERT(dChopped[cIndex].fPts[pIndex].approximatelyEqual(up));
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}
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}
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#if DEBUG_VISUALIZE_CONICS
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dChopped[0].dump();
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dChopped[1].dump();
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#endif
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}
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#include "SkBitmap.h"
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#include "SkCanvas.h"
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#include "SkImageEncoder.h"
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#include "SkPathOpsRect.h"
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#include "SkPaint.h"
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#include "SkString.h"
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#define DEBUG_VISUALIZE_CONICS 0
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#if DEBUG_VISUALIZE_CONICS
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static void writePng(const SkConic& c, const SkConic ch[2], const char* name) {
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const int scale = 10;
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SkConic conic, chopped[2];
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for (int index = 0; index < 3; ++index) {
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conic.fPts[index].fX = c.fPts[index].fX * scale;
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conic.fPts[index].fY = c.fPts[index].fY * scale;
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for (int chIndex = 0; chIndex < 2; ++chIndex) {
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chopped[chIndex].fPts[index].fX = ch[chIndex].fPts[index].fX * scale;
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chopped[chIndex].fPts[index].fY = ch[chIndex].fPts[index].fY * scale;
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}
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}
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conic.fW = c.fW;
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chopped[0].fW = ch[0].fW;
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chopped[1].fW = ch[1].fW;
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SkBitmap bitmap;
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SkRect bounds;
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conic.computeTightBounds(&bounds);
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bounds.outset(10, 10);
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bitmap.tryAllocPixels(SkImageInfo::MakeN32Premul(
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SkScalarRoundToInt(bounds.width()), SkScalarRoundToInt(bounds.height())));
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SkCanvas canvas(bitmap);
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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canvas.translate(-bounds.fLeft, -bounds.fTop);
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canvas.drawColor(SK_ColorWHITE);
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SkPath path;
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path.moveTo(conic.fPts[0]);
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path.conicTo(conic.fPts[1], conic.fPts[2], conic.fW);
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paint.setARGB(0x80, 0xFF, 0, 0);
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canvas.drawPath(path, paint);
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path.reset();
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path.moveTo(chopped[0].fPts[0]);
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path.conicTo(chopped[0].fPts[1], chopped[0].fPts[2], chopped[0].fW);
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path.moveTo(chopped[1].fPts[0]);
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path.conicTo(chopped[1].fPts[1], chopped[1].fPts[2], chopped[1].fW);
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paint.setARGB(0x80, 0, 0, 0xFF);
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canvas.drawPath(path, paint);
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SkString filename("c:\\Users\\caryclark\\Documents\\");
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filename.appendf("%s.png", name);
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SkImageEncoder::EncodeFile(filename.c_str(), bitmap,
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SkImageEncoder::kPNG_Type, 100);
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}
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static void writeDPng(const SkDConic& dC, const char* name) {
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const int scale = 5;
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SkDConic dConic = {{{ {dC.fPts[0].fX * scale, dC.fPts[0].fY * scale },
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{dC.fPts[1].fX * scale, dC.fPts[1].fY * scale },
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{dC.fPts[2].fX * scale, dC.fPts[2].fY * scale }}}, dC.fWeight };
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SkBitmap bitmap;
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SkDRect bounds;
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bounds.setBounds(dConic);
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bounds.fLeft -= 10;
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bounds.fTop -= 10;
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bounds.fRight += 10;
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bounds.fBottom += 10;
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bitmap.tryAllocPixels(SkImageInfo::MakeN32Premul(
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SkScalarRoundToInt(SkDoubleToScalar(bounds.width())),
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SkScalarRoundToInt(SkDoubleToScalar(bounds.height()))));
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SkCanvas canvas(bitmap);
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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canvas.translate(SkDoubleToScalar(-bounds.fLeft), SkDoubleToScalar(-bounds.fTop));
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canvas.drawColor(SK_ColorWHITE);
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SkPath path;
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path.moveTo(dConic.fPts[0].asSkPoint());
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path.conicTo(dConic.fPts[1].asSkPoint(), dConic.fPts[2].asSkPoint(), dConic.fWeight);
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paint.setARGB(0x80, 0xFF, 0, 0);
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canvas.drawPath(path, paint);
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path.reset();
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const int chops = 2;
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for (int tIndex = 0; tIndex < chops; ++tIndex) {
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SkDConic chopped = dConic.subDivide(tIndex / (double) chops,
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(tIndex + 1) / (double) chops);
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path.moveTo(chopped.fPts[0].asSkPoint());
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path.conicTo(chopped.fPts[1].asSkPoint(), chopped.fPts[2].asSkPoint(), chopped.fWeight);
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}
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paint.setARGB(0x80, 0, 0, 0xFF);
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canvas.drawPath(path, paint);
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SkString filename("c:\\Users\\caryclark\\Documents\\");
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filename.appendf("%s.png", name);
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SkImageEncoder::EncodeFile(filename.c_str(), bitmap,
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SkImageEncoder::kPNG_Type, 100);
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}
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#endif
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static void chopBothWays(const SkDConic& dConic, double t, const char* name) {
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SkConic conic;
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for (int index = 0; index < 3; ++index) {
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conic.fPts[index] = dConic.fPts[index].asSkPoint();
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}
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conic.fW = dConic.fWeight;
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SkConic chopped[2];
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SkDConic dChopped[2];
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conic.chopAt(SkDoubleToScalar(t), chopped);
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dChopped[0] = dConic.subDivide(0, t);
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dChopped[1] = dConic.subDivide(t, 1);
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#if DEBUG_VISUALIZE_CONICS
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dConic.dump();
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#endif
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chopCompare(chopped, dChopped);
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#if DEBUG_VISUALIZE_CONICS
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writePng(conic, chopped, name);
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#endif
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}
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#if DEBUG_VISUALIZE_CONICS
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const SkDConic frame0[] = {
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{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
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{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
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};
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const SkDConic frame1[] = {
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{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
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{{{{306.58801299999999, -227.983994}, {212.46499600000001, -262.24200400000001}, {95.551200899999998, 58.976398500000002}}}, 0.707107008f},
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{{{{377.21899400000001, -141.98100299999999}, {237.77799285476553, -166.56830755921084}, {134.08399674208422, -155.06258330544892}}}, 0.788580656f},
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{{{{134.08399674208422, -155.06258330544892}, {30.390000629402859, -143.55685905168704}, {23.185499199999999, -102.697998}}}, 0.923879623f},
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};
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const SkDConic frame2[] = {
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{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
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{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
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{{{{205.78973252799028, -158.12538713371103}, {143.97848953841861, -74.076645245042371}, {95.551200899999998, 58.976398500000002}}}, 0.923879623f},
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{{{{377.21899400000001, -141.98100299999999}, {237.77799285476553, -166.56830755921084}, {134.08399674208422, -155.06258330544892}}}, 0.788580656f},
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};
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const SkDConic frame3[] = {
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{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
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{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
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{{{{205.78973252799028, -158.12538713371103}, {143.97848953841861, -74.076645245042371}, {95.551200899999998, 58.976398500000002}}}, 0.923879623f},
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{{{{252.08225670812539, -156.90491625851064}, {185.93099479842493, -160.81544543232982}, {134.08399674208422, -155.06258330544892}}}, 0.835816324f},
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};
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const SkDConic frame4[] = {
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{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
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{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
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{{{{205.78973252799028, -158.12538713371103}, {174.88411103320448, -116.10101618937664}, {145.19509369736275, -56.857102571363754}}}, 0.871667147f},
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{{{{252.08225670812539, -156.90491625851064}, {185.93099479842493, -160.81544543232982}, {134.08399674208422, -155.06258330544892}}}, 0.835816324f},
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};
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const SkDConic frame5[] = {
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{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
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{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
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{{{{205.78973252799028, -158.12538713371103}, {174.88411103320448, -116.10101618937664}, {145.19509369736275, -56.857102571363754}}}, 0.871667147f},
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{{{{252.08225670812539, -156.90491625851064}, {219.70109133058406, -158.81912754088933}, {190.17095392508796, -158.38373974664466}}}, 0.858306944f},
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};
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const SkDConic frame6[] = {
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{{{{306.588013,-227.983994}, {212.464996,-262.242004}, {95.5512009,58.9763985}}}, 0.707107008f},
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{{{{377.218994,-141.981003}, {40.578701,-201.339996}, {23.1854992,-102.697998}}}, 0.707107008f},
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{{{{205.78973252799028, -158.12538713371103}, {190.33692178059735, -137.11320166154385}, {174.87004877564593, -111.2132534799228}}}, 0.858117759f},
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{{{{252.08225670812539, -156.90491625851064}, {219.70109133058406, -158.81912754088933}, {190.17095392508796, -158.38373974664466}}}, 0.858306944f},
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};
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const SkDConic* frames[] = {
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frame0, frame1, frame2, frame3, frame4, frame5, frame6
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};
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const int frameSizes[] = { (int) SK_ARRAY_COUNT(frame0), (int) SK_ARRAY_COUNT(frame1),
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(int) SK_ARRAY_COUNT(frame2), (int) SK_ARRAY_COUNT(frame3),
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(int) SK_ARRAY_COUNT(frame4), (int) SK_ARRAY_COUNT(frame5),
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(int) SK_ARRAY_COUNT(frame6),
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};
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static void writeFrames() {
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const int scale = 5;
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for (int index = 0; index < (int) SK_ARRAY_COUNT(frameSizes); ++index) {
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SkDRect bounds;
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bool boundsSet = false;
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int frameSize = frameSizes[index];
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for (int fIndex = 0; fIndex < frameSize; ++fIndex) {
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const SkDConic& dC = frames[index][fIndex];
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SkDConic dConic = {{{ {dC.fPts[0].fX * scale, dC.fPts[0].fY * scale },
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{dC.fPts[1].fX * scale, dC.fPts[1].fY * scale },
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{dC.fPts[2].fX * scale, dC.fPts[2].fY * scale }}}, dC.fWeight };
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SkDRect dBounds;
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dBounds.setBounds(dConic);
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if (!boundsSet) {
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bounds = dBounds;
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boundsSet = true;
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} else {
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bounds.add((SkDPoint&) dBounds.fLeft);
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bounds.add((SkDPoint&) dBounds.fRight);
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}
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}
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bounds.fLeft -= 10;
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bounds.fTop -= 10;
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bounds.fRight += 10;
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bounds.fBottom += 10;
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SkBitmap bitmap;
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bitmap.tryAllocPixels(SkImageInfo::MakeN32Premul(
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SkScalarRoundToInt(SkDoubleToScalar(bounds.width())),
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SkScalarRoundToInt(SkDoubleToScalar(bounds.height()))));
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SkCanvas canvas(bitmap);
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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canvas.translate(SkDoubleToScalar(-bounds.fLeft), SkDoubleToScalar(-bounds.fTop));
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canvas.drawColor(SK_ColorWHITE);
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for (int fIndex = 0; fIndex < frameSize; ++fIndex) {
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const SkDConic& dC = frames[index][fIndex];
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SkDConic dConic = {{{ {dC.fPts[0].fX * scale, dC.fPts[0].fY * scale },
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{dC.fPts[1].fX * scale, dC.fPts[1].fY * scale },
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{dC.fPts[2].fX * scale, dC.fPts[2].fY * scale }}}, dC.fWeight };
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SkPath path;
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path.moveTo(dConic.fPts[0].asSkPoint());
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path.conicTo(dConic.fPts[1].asSkPoint(), dConic.fPts[2].asSkPoint(), dConic.fWeight);
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if (fIndex < 2) {
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paint.setARGB(0x80, 0xFF, 0, 0);
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} else {
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paint.setARGB(0x80, 0, 0, 0xFF);
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}
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canvas.drawPath(path, paint);
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}
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SkString filename("c:\\Users\\caryclark\\Documents\\");
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filename.appendf("f%d.png", index);
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SkImageEncoder::EncodeFile(filename.c_str(), bitmap, SkImageEncoder::kPNG_Type, 100);
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}
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}
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#endif
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static void oneOff(skiatest::Reporter* reporter, const SkDConic& c1, const SkDConic& c2,
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bool coin) {
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#if DEBUG_VISUALIZE_CONICS
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writeFrames();
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#endif
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chopBothWays(c1, 0.5, "c1");
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chopBothWays(c2, 0.5, "c2");
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#if DEBUG_VISUALIZE_CONICS
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writeDPng(c1, "d1");
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writeDPng(c2, "d2");
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#endif
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SkASSERT(ValidConic(c1));
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SkASSERT(ValidConic(c2));
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SkIntersections intersections;
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intersections.intersect(c1, c2);
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if (coin && intersections.used() != 2) {
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SkDebugf("");
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}
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REPORTER_ASSERT(reporter, !coin || intersections.used() == 2);
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double tt1, tt2;
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SkDPoint xy1, xy2;
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for (int pt3 = 0; pt3 < intersections.used(); ++pt3) {
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tt1 = intersections[0][pt3];
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xy1 = c1.ptAtT(tt1);
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tt2 = intersections[1][pt3];
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xy2 = c2.ptAtT(tt2);
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const SkDPoint& iPt = intersections.pt(pt3);
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REPORTER_ASSERT(reporter, xy1.approximatelyEqual(iPt));
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REPORTER_ASSERT(reporter, xy2.approximatelyEqual(iPt));
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REPORTER_ASSERT(reporter, xy1.approximatelyEqual(xy2));
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}
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reporter->bumpTestCount();
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}
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static void oneOff(skiatest::Reporter* reporter, int outer, int inner) {
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const SkDConic& c1 = testSet[outer];
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const SkDConic& c2 = testSet[inner];
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oneOff(reporter, c1, c2, false);
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}
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static void oneOffTests(skiatest::Reporter* reporter) {
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for (int outer = 0; outer < testSetCount - 1; ++outer) {
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for (int inner = outer + 1; inner < testSetCount; ++inner) {
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oneOff(reporter, outer, inner);
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}
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}
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}
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DEF_TEST(PathOpsConicIntersectionOneOff, reporter) {
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oneOff(reporter, 0, 1);
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}
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DEF_TEST(PathOpsConicIntersection, reporter) {
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oneOffTests(reporter);
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}
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