/* * 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/SkBitmap.h" #include "include/core/SkCanvas.h" #include "include/core/SkColor.h" #include "include/core/SkImageInfo.h" #include "include/core/SkMatrix.h" #include "include/core/SkPaint.h" #include "include/core/SkPath.h" #include "include/core/SkPathEffect.h" #include "include/core/SkPoint.h" #include "include/core/SkRRect.h" #include "include/core/SkRect.h" #include "include/core/SkRefCnt.h" #include "include/core/SkScalar.h" #include "include/core/SkStrokeRec.h" #include "include/core/SkSurface.h" #include "include/core/SkTypes.h" #include "include/effects/SkDashPathEffect.h" #include "tests/Test.h" // test that we can draw an aa-rect at coordinates > 32K (bigger than fixedpoint) static void test_big_aa_rect(skiatest::Reporter* reporter) { SkBitmap output; SkPMColor pixel[1]; output.installPixels(SkImageInfo::MakeN32Premul(1, 1), pixel, 4); auto surf = SkSurface::MakeRasterN32Premul(300, 33300); SkCanvas* canvas = surf->getCanvas(); SkRect r = { 0, 33000, 300, 33300 }; int x = SkScalarRoundToInt(r.left()); int y = SkScalarRoundToInt(r.top()); // check that the pixel in question starts as transparent (by the surface) if (surf->readPixels(output, x, y)) { REPORTER_ASSERT(reporter, 0 == pixel[0]); } else { REPORTER_ASSERT(reporter, false, "readPixels failed"); } SkPaint paint; paint.setAntiAlias(true); paint.setColor(SK_ColorWHITE); canvas->drawRect(r, paint); // Now check that it is BLACK if (surf->readPixels(output, x, y)) { // don't know what swizzling PMColor did, but white should always // appear the same. REPORTER_ASSERT(reporter, 0xFFFFFFFF == pixel[0]); } else { REPORTER_ASSERT(reporter, false, "readPixels failed"); } } /////////////////////////////////////////////////////////////////////////////// static void moveToH(SkPath* path, const uint32_t raw[]) { const float* fptr = (const float*)raw; path->moveTo(fptr[0], fptr[1]); } static void cubicToH(SkPath* path, const uint32_t raw[]) { const float* fptr = (const float*)raw; path->cubicTo(fptr[0], fptr[1], fptr[2], fptr[3], fptr[4], fptr[5]); } // This used to assert, because we performed a cast (int)(pt[0].fX * scale) to // arrive at an int (SkFDot6) rather than calling sk_float_round2int. The assert // was that the initial line-segment produced by the cubic was not monotonically // going down (i.e. the initial DY was negative). By rounding the floats, we get // the more proper result. // // http://code.google.com/p/chromium/issues/detail?id=131181 // // we're not calling this test anymore; is that for a reason? static void test_crbug131181() { /* fX = 18.8943768, fY = 129.121277 }, { fX = 18.8937435, fY = 129.121689 }, { fX = 18.8950119, fY = 129.120422 }, { fX = 18.5030727, fY = 129.13121 */ uint32_t data[] = { 0x419727af, 0x43011f0c, 0x41972663, 0x43011f27, 0x419728fc, 0x43011ed4, 0x4194064b, 0x43012197 }; SkPath path; moveToH(&path, &data[0]); cubicToH(&path, &data[2]); auto surface(SkSurface::MakeRasterN32Premul(640, 480)); SkPaint paint; paint.setAntiAlias(true); surface->getCanvas()->drawPath(path, paint); } // This used to assert in debug builds (and crash writing bad memory in release) // because we overflowed an intermediate value (B coefficient) setting up our // stepper for the quadratic. Now we bias that value by 1/2 so we don't overflow static void test_crbug_140803() { SkBitmap bm; bm.allocN32Pixels(2700, 30*1024); SkCanvas canvas(bm); SkPaint paint; paint.setAntiAlias(true); canvas.drawPath(SkPath().moveTo(2762, 20).quadTo(11, 21702, 10, 21706), paint); } // Need to exercise drawing an inverse-path whose bounds intersect the clip, // but whose edges do not (since its a quad which draws only in the bottom half // of its bounds). // In the debug build, we used to assert in this case, until it was fixed. // static void test_inversepathwithclip() { SkPath path; path.moveTo(0, 20); path.quadTo(10, 10, 20, 20); path.toggleInverseFillType(); SkPaint paint; auto surface(SkSurface::MakeRasterN32Premul(640, 480)); SkCanvas* canvas = surface->getCanvas(); canvas->save(); canvas->clipRect(SkRect::MakeWH(19, 11)); paint.setAntiAlias(false); canvas->drawPath(path, paint); paint.setAntiAlias(true); canvas->drawPath(path, paint); canvas->restore(); // Now do the test again, with the path flipped, so we only draw in the // top half of our bounds, and have the clip intersect our bounds at the // bottom. path.reset(); // preserves our filltype path.moveTo(0, 10); path.quadTo(10, 20, 20, 10); canvas->clipRect(SkRect::MakeXYWH(0, 19, 19, 11)); paint.setAntiAlias(false); canvas->drawPath(path, paint); paint.setAntiAlias(true); canvas->drawPath(path, paint); } static void test_bug533() { /* http://code.google.com/p/skia/issues/detail?id=533 This particular test/bug only applies to the float case, where the coordinates are very large. */ SkPath path; path.moveTo(64, 3); path.quadTo(-329936, -100000000, 1153, 330003); SkPaint paint; paint.setAntiAlias(true); auto surface(SkSurface::MakeRasterN32Premul(640, 480)); surface->getCanvas()->drawPath(path, paint); } static void test_crbug_140642() { /* * We used to see this construct, and due to rounding as we accumulated * our length, the loop where we apply the phase would run off the end of * the array, since it relied on just -= each interval value, which did not * behave as "expected". Now the code explicitly checks for walking off the * end of that array. * A different (better) fix might be to rewrite dashing to do all of its * length/phase/measure math using double, but this may need to be * coordinated with SkPathMeasure, to be consistent between the two. <path stroke="mintcream" stroke-dasharray="27734 35660 2157846850 247" stroke-dashoffset="-248.135982067"> */ const SkScalar vals[] = { 27734, 35660, 2157846850.0f, 247 }; auto dontAssert = SkDashPathEffect::Make(vals, 4, -248.135982067f); } static void test_crbug_124652() { /* http://code.google.com/p/chromium/issues/detail?id=124652 This particular test/bug only applies to the float case, where large values can "swamp" small ones. */ SkScalar intervals[2] = {837099584, 33450}; auto dontAssert = SkDashPathEffect::Make(intervals, 2, -10); } static void test_bigcubic() { SkPath path; path.moveTo(64, 3); path.cubicTo(-329936, -100000000, -329936, 100000000, 1153, 330003); SkPaint paint; paint.setAntiAlias(true); auto surface(SkSurface::MakeRasterN32Premul(640, 480)); surface->getCanvas()->drawPath(path, paint); } // asserts if halfway case is not handled static void test_halfway() { SkPaint paint; SkPath path; path.moveTo(16365.5f, 1394); path.lineTo(16365.5f, 1387.5f); path.quadTo(16365.5f, 1385.43f, 16367, 1383.96f); path.quadTo(16368.4f, 1382.5f, 16370.5f, 1382.5f); path.lineTo(16465.5f, 1382.5f); path.quadTo(16467.6f, 1382.5f, 16469, 1383.96f); path.quadTo(16470.5f, 1385.43f, 16470.5f, 1387.5f); path.lineTo(16470.5f, 1394); path.quadTo(16470.5f, 1396.07f, 16469, 1397.54f); path.quadTo(16467.6f, 1399, 16465.5f, 1399); path.lineTo(16370.5f, 1399); path.quadTo(16368.4f, 1399, 16367, 1397.54f); path.quadTo(16365.5f, 1396.07f, 16365.5f, 1394); path.close(); SkPath p2; SkMatrix m; m.reset(); m.postTranslate(0.001f, 0.001f); path.transform(m, &p2); auto surface(SkSurface::MakeRasterN32Premul(640, 480)); SkCanvas* canvas = surface->getCanvas(); canvas->translate(-16366, -1383); canvas->drawPath(p2, paint); m.reset(); m.postTranslate(-0.001f, -0.001f); path.transform(m, &p2); canvas->drawPath(p2, paint); m.reset(); path.transform(m, &p2); canvas->drawPath(p2, paint); } // we used to assert if the bounds of the device (clip) was larger than 32K // even when the path itself was smaller. We just draw and hope in the debug // version to not assert. static void test_giantaa() { const int W = 400; const int H = 400; auto surface(SkSurface::MakeRasterN32Premul(33000, 10)); SkPaint paint; paint.setAntiAlias(true); SkPath path; path.addOval(SkRect::MakeXYWH(-10, -10, 20 + W, 20 + H)); surface->getCanvas()->drawPath(path, paint); } // Extremely large path_length/dash_length ratios may cause infinite looping // in SkDashPathEffect::filterPath() due to single precision rounding. // The test is quite expensive, but it should get much faster after the fix // for http://crbug.com/165432 goes in. static void test_infinite_dash(skiatest::Reporter* reporter) { SkPath path; path.moveTo(0, 0); path.lineTo(5000000, 0); SkScalar intervals[] = { 0.2f, 0.2f }; sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, 2, 0)); SkPath filteredPath; SkPaint paint; paint.setStyle(SkPaint::kStroke_Style); paint.setPathEffect(dash); paint.getFillPath(path, &filteredPath); // If we reach this, we passed. REPORTER_ASSERT(reporter, true); } // http://crbug.com/165432 // Limit extreme dash path effects to avoid exhausting the system memory. static void test_crbug_165432(skiatest::Reporter* reporter) { SkPath path; path.moveTo(0, 0); path.lineTo(10000000, 0); SkScalar intervals[] = { 0.5f, 0.5f }; sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, 2, 0)); SkPaint paint; paint.setStyle(SkPaint::kStroke_Style); paint.setPathEffect(dash); SkPath filteredPath; SkStrokeRec rec(paint); REPORTER_ASSERT(reporter, !dash->filterPath(&filteredPath, path, &rec, nullptr)); REPORTER_ASSERT(reporter, filteredPath.isEmpty()); } // http://crbug.com/472147 // This is a simplified version from the bug. RRect radii not properly scaled. static void test_crbug_472147_simple(skiatest::Reporter* reporter) { auto surface(SkSurface::MakeRasterN32Premul(1000, 1000)); SkCanvas* canvas = surface->getCanvas(); SkPaint p; SkRect r = SkRect::MakeLTRB(-246.0f, 33.0f, 848.0f, 33554464.0f); SkVector radii[4] = { { 13.0f, 8.0f }, { 170.0f, 2.0 }, { 256.0f, 33554430.0f }, { 120.0f, 5.0f } }; SkRRect rr; rr.setRectRadii(r, radii); canvas->drawRRect(rr, p); } // http://crbug.com/472147 // RRect radii not properly scaled. static void test_crbug_472147_actual(skiatest::Reporter* reporter) { auto surface(SkSurface::MakeRasterN32Premul(1000, 1000)); SkCanvas* canvas = surface->getCanvas(); SkPaint p; SkRect r = SkRect::MakeLTRB(-246.0f, 33.0f, 848.0f, 33554464.0f); SkVector radii[4] = { { 13.0f, 8.0f }, { 170.0f, 2.0 }, { 256.0f, 33554430.0f }, { 120.0f, 5.0f } }; SkRRect rr; rr.setRectRadii(r, radii); canvas->clipRRect(rr); SkRect r2 = SkRect::MakeLTRB(0, 33, 1102, 33554464); canvas->drawRect(r2, p); } DEF_TEST(DrawPath, reporter) { test_giantaa(); test_bug533(); test_bigcubic(); test_crbug_124652(); test_crbug_140642(); test_crbug_140803(); test_inversepathwithclip(); // why? if (false) test_crbug131181(); test_infinite_dash(reporter); test_crbug_165432(reporter); test_crbug_472147_simple(reporter); test_crbug_472147_actual(reporter); test_big_aa_rect(reporter); test_halfway(); }