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- /*
- * 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();
- }
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