/* * 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 "include/core/SkPaint.h" #include "include/core/SkPath.h" #include "include/core/SkRect.h" #include "include/core/SkStrokeRec.h" #include "src/core/SkPathPriv.h" #include "src/core/SkStroke.h" #include "tests/Test.h" static bool equal(const SkRect& a, const SkRect& b) { return SkScalarNearlyEqual(a.left(), b.left()) && SkScalarNearlyEqual(a.top(), b.top()) && SkScalarNearlyEqual(a.right(), b.right()) && SkScalarNearlyEqual(a.bottom(), b.bottom()); } static void test_strokecubic(skiatest::Reporter* reporter) { uint32_t hexCubicVals[] = { 0x424c1086, 0x44bcf0cb, // fX=51.0161362 fY=1511.52478 0x424c107c, 0x44bcf0cb, // fX=51.0160980 fY=1511.52478 0x424c10c2, 0x44bcf0cb, // fX=51.0163651 fY=1511.52478 0x424c1119, 0x44bcf0ca, // fX=51.0166969 fY=1511.52466 }; SkPoint cubicVals[] = { {51.0161362f, 1511.52478f }, {51.0160980f, 1511.52478f }, {51.0163651f, 1511.52478f }, {51.0166969f, 1511.52466f }, }; SkPaint paint; paint.setStyle(SkPaint::kStroke_Style); paint.setStrokeWidth(0.394537568f); SkPath path, fillPath; path.moveTo(cubicVals[0]); path.cubicTo(cubicVals[1], cubicVals[2], cubicVals[3]); paint.getFillPath(path, &fillPath); path.reset(); path.moveTo(SkBits2Float(hexCubicVals[0]), SkBits2Float(hexCubicVals[1])); path.cubicTo(SkBits2Float(hexCubicVals[2]), SkBits2Float(hexCubicVals[3]), SkBits2Float(hexCubicVals[4]), SkBits2Float(hexCubicVals[5]), SkBits2Float(hexCubicVals[6]), SkBits2Float(hexCubicVals[7])); paint.getFillPath(path, &fillPath); } static void test_strokerect(skiatest::Reporter* reporter) { const SkScalar width = SkIntToScalar(10); SkPaint paint; paint.setStyle(SkPaint::kStroke_Style); paint.setStrokeWidth(width); SkRect r = { 0, 0, SkIntToScalar(200), SkIntToScalar(100) }; SkRect outer(r); outer.outset(width/2, width/2); static const SkPaint::Join joins[] = { SkPaint::kMiter_Join, SkPaint::kRound_Join, SkPaint::kBevel_Join }; for (size_t i = 0; i < SK_ARRAY_COUNT(joins); ++i) { paint.setStrokeJoin(joins[i]); SkPath path, fillPath; path.addRect(r); paint.getFillPath(path, &fillPath); REPORTER_ASSERT(reporter, equal(outer, fillPath.getBounds())); bool isMiter = SkPaint::kMiter_Join == joins[i]; SkRect nested[2]; REPORTER_ASSERT(reporter, SkPathPriv::IsNestedFillRects(fillPath, nested) == isMiter); if (isMiter) { SkRect inner(r); inner.inset(width/2, width/2); REPORTER_ASSERT(reporter, equal(nested[0], outer)); REPORTER_ASSERT(reporter, equal(nested[1], inner)); } } } static void test_strokerec_equality(skiatest::Reporter* reporter) { { SkStrokeRec s1(SkStrokeRec::kFill_InitStyle); SkStrokeRec s2(SkStrokeRec::kFill_InitStyle); REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2)); // Test that style mismatch is detected. s2.setHairlineStyle(); REPORTER_ASSERT(reporter, !s1.hasEqualEffect(s2)); s1.setHairlineStyle(); REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2)); // ResScale is not part of equality. s1.setResScale(2.1f); s2.setResScale(1.2f); REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2)); s1.setFillStyle(); s2.setFillStyle(); REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2)); s1.setStrokeStyle(1.0f, false); s2.setStrokeStyle(1.0f, false); s1.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.9f); s2.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.9f); REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2)); } // Stroke parameters on fill or hairline style are not part of equality. { SkStrokeRec s1(SkStrokeRec::kFill_InitStyle); SkStrokeRec s2(SkStrokeRec::kFill_InitStyle); for (int i = 0; i < 2; ++i) { s1.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.9f); s2.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.1f); REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2)); s2.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kBevel_Join, 2.9f); REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2)); s2.setStrokeParams(SkPaint::kRound_Cap, SkPaint::kRound_Join, 2.9f); REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2)); s1.setHairlineStyle(); s2.setHairlineStyle(); } } // Stroke parameters on stroke style are part of equality. { SkStrokeRec s1(SkStrokeRec::kFill_InitStyle); SkStrokeRec s2(SkStrokeRec::kFill_InitStyle); s1.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.9f); s2.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.9f); s1.setStrokeStyle(1.0f, false); s2.setStrokeStyle(1.0f, true); REPORTER_ASSERT(reporter, !s1.hasEqualEffect(s2)); s2.setStrokeStyle(2.1f, false); REPORTER_ASSERT(reporter, !s1.hasEqualEffect(s2)); s2.setStrokeStyle(1.0f, false); REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2)); s2.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.1f); REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2)); // Miter limit not relevant to butt caps. s2.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kBevel_Join, 2.9f); REPORTER_ASSERT(reporter, !s1.hasEqualEffect(s2)); s2.setStrokeParams(SkPaint::kRound_Cap, SkPaint::kRound_Join, 2.9f); REPORTER_ASSERT(reporter, !s1.hasEqualEffect(s2)); // Sets fill. s1.setStrokeStyle(0.0f, true); s2.setStrokeStyle(0.0f, true); REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2)); } } // From skbug.com/6491. The large stroke width can cause numerical instabilities. static void test_big_stroke(skiatest::Reporter* reporter) { SkPaint paint; paint.setStyle(SkPaint::kStrokeAndFill_Style); paint.setStrokeWidth(1.49679073e+10f); SkPath path; path.moveTo(SkBits2Float(0x46380000), SkBits2Float(0xc6380000)); // 11776, -11776 path.lineTo(SkBits2Float(0x46a00000), SkBits2Float(0xc6a00000)); // 20480, -20480 path.lineTo(SkBits2Float(0x468c0000), SkBits2Float(0xc68c0000)); // 17920, -17920 path.lineTo(SkBits2Float(0x46100000), SkBits2Float(0xc6100000)); // 9216, -9216 path.lineTo(SkBits2Float(0x46380000), SkBits2Float(0xc6380000)); // 11776, -11776 path.close(); SkPath strokeAndFillPath; paint.getFillPath(path, &strokeAndFillPath); } DEF_TEST(Stroke, reporter) { test_strokecubic(reporter); test_strokerect(reporter); test_strokerec_equality(reporter); test_big_stroke(reporter); }