1 /* 2 * Copyright 2012 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 #include "PathOpsExtendedTest.h" 8 #include "PathOpsThreadedCommon.h" 9 #include "SkIntersections.h" 10 #include "SkPathOpsLine.h" 11 #include "SkPathOpsQuad.h" 12 #include "SkReduceOrder.h" 13 14 static int doIntersect(SkIntersections& intersections, const SkDQuad& quad, const SkDLine& line, 15 bool& flipped) { 16 int result; 17 flipped = false; 18 if (line[0].fX == line[1].fX) { 19 double top = line[0].fY; 20 double bottom = line[1].fY; 21 flipped = top > bottom; 22 if (flipped) { 23 SkTSwap<double>(top, bottom); 24 } 25 result = intersections.vertical(quad, top, bottom, line[0].fX, flipped); 26 } else if (line[0].fY == line[1].fY) { 27 double left = line[0].fX; 28 double right = line[1].fX; 29 flipped = left > right; 30 if (flipped) { 31 SkTSwap<double>(left, right); 32 } 33 result = intersections.horizontal(quad, left, right, line[0].fY, flipped); 34 } else { 35 intersections.intersect(quad, line); 36 result = intersections.used(); 37 } 38 return result; 39 } 40 41 static void testLineIntersect(skiatest::Reporter* reporter, const SkDQuad& quad, 42 const SkDLine& line, const double x, const double y) { 43 char pathStr[1024]; 44 sk_bzero(pathStr, sizeof(pathStr)); 45 char* str = pathStr; 46 str += sprintf(str, " path.moveTo(%1.9g, %1.9g);\n", quad[0].fX, quad[0].fY); 47 str += sprintf(str, " path.quadTo(%1.9g, %1.9g, %1.9g, %1.9g);\n", quad[1].fX, 48 quad[1].fY, quad[2].fX, quad[2].fY); 49 str += sprintf(str, " path.moveTo(%1.9g, %1.9g);\n", line[0].fX, line[0].fY); 50 str += sprintf(str, " path.lineTo(%1.9g, %1.9g);\n", line[1].fX, line[1].fY); 51 52 SkIntersections intersections; 53 bool flipped = false; 54 int result = doIntersect(intersections, quad, line, flipped); 55 bool found = false; 56 for (int index = 0; index < result; ++index) { 57 double quadT = intersections[0][index]; 58 SkDPoint quadXY = quad.ptAtT(quadT); 59 double lineT = intersections[1][index]; 60 SkDPoint lineXY = line.ptAtT(lineT); 61 if (quadXY.approximatelyEqual(lineXY)) { 62 found = true; 63 } 64 } 65 REPORTER_ASSERT(reporter, found); 66 } 67 68 // find a point on a quad by choosing a t from 0 to 1 69 // create a vertical span above and below the point 70 // verify that intersecting the vertical span and the quad returns t 71 // verify that a vertical span starting at quad[0] intersects at t=0 72 // verify that a vertical span starting at quad[2] intersects at t=1 73 static void testQuadLineIntersectMain(PathOpsThreadState* data) 74 { 75 PathOpsThreadState& state = *data; 76 REPORTER_ASSERT(state.fReporter, data); 77 int ax = state.fA & 0x03; 78 int ay = state.fA >> 2; 79 int bx = state.fB & 0x03; 80 int by = state.fB >> 2; 81 int cx = state.fC & 0x03; 82 int cy = state.fC >> 2; 83 SkDQuad quad = {{{(double) ax, (double) ay}, {(double) bx, (double) by}, 84 {(double) cx, (double) cy}}}; 85 SkReduceOrder reducer; 86 int order = reducer.reduce(quad); 87 if (order < 3) { 88 return; 89 } 90 for (int tIndex = 0; tIndex <= 4; ++tIndex) { 91 SkDPoint xy = quad.ptAtT(tIndex / 4.0); 92 for (int h = -2; h <= 2; ++h) { 93 for (int v = -2; v <= 2; ++v) { 94 if (h == v && SkTAbs(h) != 1) { 95 continue; 96 } 97 double x = xy.fX; 98 double y = xy.fY; 99 SkDLine line = {{{x - h, y - v}, {x, y}}}; 100 testLineIntersect(state.fReporter, quad, line, x, y); 101 state.fReporter->bumpTestCount(); 102 SkDLine line2 = {{{x, y}, {x + h, y + v}}}; 103 testLineIntersect(state.fReporter, quad, line2, x, y); 104 state.fReporter->bumpTestCount(); 105 SkDLine line3 = {{{x - h, y - v}, {x + h, y + v}}}; 106 testLineIntersect(state.fReporter, quad, line3, x, y); 107 state.fReporter->bumpTestCount(); 108 } 109 } 110 } 111 } 112 113 DEF_TEST(PathOpsQuadLineIntersectionThreaded, reporter) { 114 initializeTests(reporter, "testQuadLineIntersect"); 115 PathOpsThreadedTestRunner testRunner(reporter); 116 for (int a = 0; a < 16; ++a) { 117 for (int b = 0 ; b < 16; ++b) { 118 for (int c = 0 ; c < 16; ++c) { 119 *testRunner.fRunnables.append() = new PathOpsThreadedRunnable( 120 &testQuadLineIntersectMain, a, b, c, 0, &testRunner); 121 } 122 if (!reporter->allowExtendedTest()) goto finish; 123 } 124 } 125 finish: 126 testRunner.render(); 127 } 128
