| /* |
| * 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 "SkBitmap.h" |
| #include "SkCanvas.h" |
| #include "SkDashPathEffect.h" |
| #include "SkSurface.h" |
| #include "Test.h" |
| |
| static SkCanvas* new_canvas(int w, int h) { |
| SkBitmap bm; |
| bm.allocN32Pixels(w, h); |
| return new SkCanvas(bm); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| // 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, NULL, NULL); |
| |
| SkSurface* surf = SkSurface::NewRasterPMColor(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 (canvas->readPixels(&output, x, y)) { |
| REPORTER_ASSERT(reporter, 0 == pixel[0]); |
| } else { |
| REPORTER_ASSERT_MESSAGE(reporter, false, "readPixels failed"); |
| } |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setColor(SK_ColorWHITE); |
| |
| canvas->drawRect(r, paint); |
| |
| // Now check that it is BLACK |
| if (canvas->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_MESSAGE(reporter, false, "readPixels failed"); |
| } |
| surf->unref(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| 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]); |
| |
| SkAutoTUnref<SkCanvas> canvas(new_canvas(640, 480)); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| canvas->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); |
| |
| SkPath path; |
| path.moveTo(2762, 20); |
| path.quadTo(11, 21702, 10, 21706); |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| canvas.drawPath(path, 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, SkIntToScalar(20)); |
| path.quadTo(SkIntToScalar(10), SkIntToScalar(10), |
| SkIntToScalar(20), SkIntToScalar(20)); |
| path.toggleInverseFillType(); |
| |
| SkPaint paint; |
| |
| SkAutoTUnref<SkCanvas> canvas(new_canvas(640, 480)); |
| canvas.get()->save(); |
| canvas.get()->clipRect(SkRect::MakeWH(SkIntToScalar(19), SkIntToScalar(11))); |
| |
| paint.setAntiAlias(false); |
| canvas.get()->drawPath(path, paint); |
| paint.setAntiAlias(true); |
| canvas.get()->drawPath(path, paint); |
| |
| canvas.get()->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, SkIntToScalar(10)); |
| path.quadTo(SkIntToScalar(10), SkIntToScalar(20), |
| SkIntToScalar(20), SkIntToScalar(10)); |
| canvas.get()->clipRect(SkRect::MakeXYWH(SkIntToScalar(0), SkIntToScalar(19), |
| SkIntToScalar(19), SkIntToScalar(11))); |
| |
| paint.setAntiAlias(false); |
| canvas.get()->drawPath(path, paint); |
| paint.setAntiAlias(true); |
| canvas.get()->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); |
| |
| SkAutoTUnref<SkCanvas> canvas(new_canvas(640, 480)); |
| canvas.get()->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 }; |
| SkAutoTUnref<SkDashPathEffect> dontAssert(SkDashPathEffect::Create(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}; |
| SkAutoTUnref<SkDashPathEffect> dash(SkDashPathEffect::Create(intervals, 2, -10, false)); |
| } |
| |
| static void test_bigcubic() { |
| SkPath path; |
| path.moveTo(64, 3); |
| path.cubicTo(-329936, -100000000, -329936, 100000000, 1153, 330003); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| |
| SkAutoTUnref<SkCanvas> canvas(new_canvas(640, 480)); |
| canvas.get()->drawPath(path, 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; |
| SkAutoTUnref<SkCanvas> canvas(new_canvas(33000, 10)); |
| canvas.get()->clear(SK_ColorTRANSPARENT); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| SkPath path; |
| path.addOval(SkRect::MakeXYWH(-10, -10, 20 + W, 20 + H)); |
| canvas.get()->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 }; |
| SkAutoTUnref<SkDashPathEffect> dash(SkDashPathEffect::Create(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 }; |
| SkAutoTUnref<SkDashPathEffect> dash(SkDashPathEffect::Create(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, NULL)); |
| REPORTER_ASSERT(reporter, filteredPath.isEmpty()); |
| } |
| |
| 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_big_aa_rect(reporter); |
| } |