| /* |
| * Copyright 2011 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/SkPaint.h" |
| #include "include/core/SkPath.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkSurface.h" |
| #include "include/core/SkTypes.h" |
| #include "include/private/base/SkDebug.h" |
| #include "include/private/base/SkFloatBits.h" |
| #include "src/core/SkCubicClipper.h" |
| #include "tests/Test.h" |
| |
| // Currently the supersampler blitter uses int16_t for its index into an array |
| // the width of the clip. Test that we don't crash/assert if we try to draw |
| // with a device/clip that is larger. |
| static void test_giantClip() { |
| SkBitmap bm; |
| bm.allocN32Pixels(64919, 1); |
| SkCanvas canvas(bm); |
| canvas.clear(SK_ColorTRANSPARENT); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| canvas.drawPath(SkPath::Polygon({{0,0}, {1,0}, {33,1}}, false), paint); |
| } |
| |
| static void PrintCurve(const char *name, const SkPoint crv[4]) { |
| SkDebugf("%s: %.10g, %.10g, %.10g, %.10g, %.10g, %.10g, %.10g, %.10g\n", |
| name, |
| (float)crv[0].fX, (float)crv[0].fY, |
| (float)crv[1].fX, (float)crv[1].fY, |
| (float)crv[2].fX, (float)crv[2].fY, |
| (float)crv[3].fX, (float)crv[3].fY); |
| |
| } |
| |
| |
| static bool CurvesAreEqual(const SkPoint c0[4], |
| const SkPoint c1[4], |
| float tol) { |
| for (int i = 0; i < 4; i++) { |
| if (SkScalarAbs(c0[i].fX - c1[i].fX) > tol || |
| SkScalarAbs(c0[i].fY - c1[i].fY) > tol |
| ) { |
| PrintCurve("c0", c0); |
| PrintCurve("c1", c1); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| |
| static SkPoint* SetCurve(float x0, float y0, |
| float x1, float y1, |
| float x2, float y2, |
| float x3, float y3, |
| SkPoint crv[4]) { |
| crv[0].fX = x0; crv[0].fY = y0; |
| crv[1].fX = x1; crv[1].fY = y1; |
| crv[2].fX = x2; crv[2].fY = y2; |
| crv[3].fX = x3; crv[3].fY = y3; |
| return crv; |
| } |
| |
| |
| DEF_TEST(ClipCubic, reporter) { |
| static SkPoint crv[4] = { |
| { SkIntToScalar(0), SkIntToScalar(0) }, |
| { SkIntToScalar(2), SkIntToScalar(3) }, |
| { SkIntToScalar(1), SkIntToScalar(10) }, |
| { SkIntToScalar(4), SkIntToScalar(12) } |
| }; |
| |
| SkCubicClipper clipper; |
| SkPoint clipped[4], shouldbe[4]; |
| SkIRect clipRect; |
| bool success; |
| const float tol = 1e-4f; |
| |
| // Test no clip, with plenty of room. |
| clipRect.setLTRB(-2, -2, 6, 14); |
| clipper.setClip(clipRect); |
| success = clipper.clipCubic(crv, clipped); |
| REPORTER_ASSERT(reporter, success == true); |
| REPORTER_ASSERT(reporter, CurvesAreEqual(clipped, SetCurve( |
| 0, 0, 2, 3, 1, 10, 4, 12, shouldbe), tol)); |
| |
| // Test no clip, touching first point. |
| clipRect.setLTRB(-2, 0, 6, 14); |
| clipper.setClip(clipRect); |
| success = clipper.clipCubic(crv, clipped); |
| REPORTER_ASSERT(reporter, success == true); |
| REPORTER_ASSERT(reporter, CurvesAreEqual(clipped, SetCurve( |
| 0, 0, 2, 3, 1, 10, 4, 12, shouldbe), tol)); |
| |
| // Test no clip, touching last point. |
| clipRect.setLTRB(-2, -2, 6, 12); |
| clipper.setClip(clipRect); |
| success = clipper.clipCubic(crv, clipped); |
| REPORTER_ASSERT(reporter, success == true); |
| REPORTER_ASSERT(reporter, CurvesAreEqual(clipped, SetCurve( |
| 0, 0, 2, 3, 1, 10, 4, 12, shouldbe), tol)); |
| |
| // Test all clip. |
| clipRect.setLTRB(-2, 14, 6, 20); |
| clipper.setClip(clipRect); |
| success = clipper.clipCubic(crv, clipped); |
| REPORTER_ASSERT(reporter, success == false); |
| |
| // Test clip at 1. |
| clipRect.setLTRB(-2, 1, 6, 14); |
| clipper.setClip(clipRect); |
| success = clipper.clipCubic(crv, clipped); |
| REPORTER_ASSERT(reporter, success == true); |
| REPORTER_ASSERT(reporter, CurvesAreEqual(clipped, SetCurve( |
| 0.5126125216f, 1, |
| 1.841195941f, 4.337081432f, |
| 1.297019958f, 10.19801331f, |
| 4, 12, |
| shouldbe), tol)); |
| |
| // Test clip at 2. |
| clipRect.setLTRB(-2, 2, 6, 14); |
| clipper.setClip(clipRect); |
| success = clipper.clipCubic(crv, clipped); |
| REPORTER_ASSERT(reporter, success == true); |
| REPORTER_ASSERT(reporter, CurvesAreEqual(clipped, SetCurve( |
| 00.8412352204f, 2, |
| 1.767683744f, 5.400758266f, |
| 1.55052948f, 10.36701965f, |
| 4, 12, |
| shouldbe), tol)); |
| |
| // Test clip at 11. |
| clipRect.setLTRB(-2, -2, 6, 11); |
| clipper.setClip(clipRect); |
| success = clipper.clipCubic(crv, clipped); |
| REPORTER_ASSERT(reporter, success == true); |
| REPORTER_ASSERT(reporter, CurvesAreEqual(clipped, SetCurve( |
| 0, 0, |
| 1.742904663f, 2.614356995f, |
| 1.207521796f, 8.266430855f, |
| 3.026495695f, 11, |
| shouldbe), tol)); |
| |
| // Test clip at 10. |
| clipRect.setLTRB(-2, -2, 6, 10); |
| clipper.setClip(clipRect); |
| success = clipper.clipCubic(crv, clipped); |
| REPORTER_ASSERT(reporter, success == true); |
| REPORTER_ASSERT(reporter, CurvesAreEqual(clipped, SetCurve( |
| 0, 0, |
| 1.551193237f, 2.326789856f, |
| 1.297736168f, 7.059780121f, |
| 2.505550385f, 10, |
| shouldbe), tol)); |
| |
| test_giantClip(); |
| } |
| |
| DEF_TEST(test_fuzz_crbug_698714, reporter) { |
| auto surface(SkSurface::MakeRasterN32Premul(500, 500)); |
| SkCanvas* canvas = surface->getCanvas(); |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| SkPath path; |
| path.moveTo(SkBits2Float(0x00000000), SkBits2Float(0x00000000)); // 0,0 |
| path.lineTo(SkBits2Float(0x43434343), SkBits2Float(0x43430143)); //195.263f, 195.005f |
| path.lineTo(SkBits2Float(0x43434343), SkBits2Float(0x43434343)); //195.263f, 195.263f |
| path.lineTo(SkBits2Float(0xb5434343), SkBits2Float(0x434300be)); //-7.2741e-07f, 195.003f |
| // 195.263f, 195.263f, -1.16387e-05f, 3.58641e-38f, 3.85088e-29f,1.86082e-39f |
| path.cubicTo(SkBits2Float(0x43434343), SkBits2Float(0x43434341), |
| SkBits2Float(0xb74343bd), SkBits2Float(0x01434343), |
| SkBits2Float(0x10434343), SkBits2Float(0x00144332)); |
| // 4.11823e-38f, 195.263f, 195.263f, 195.263f, -7.2741e-07f, 195.263f |
| path.cubicTo(SkBits2Float(0x016037c0), SkBits2Float(0x43434343), |
| SkBits2Float(0x43434343), SkBits2Float(0x43434343), |
| SkBits2Float(0xb5434343), SkBits2Float(0x43434343)); |
| // 195.263f, 195.263f, -1.16387e-05f, 3.58641e-38f, 195.263f, -2 |
| path.cubicTo(SkBits2Float(0x43434344), SkBits2Float(0x43434341), |
| SkBits2Float(0xb74343bd), SkBits2Float(0x01434343), |
| SkBits2Float(0x43434343), SkBits2Float(0xc0000014)); |
| // -5.87228e+06f, 3.7773e-07f, 3.60231e-13f, -6.64511e+06f,2.77692e-15f, 2.48803e-15f |
| path.cubicTo(SkBits2Float(0xcab33535), SkBits2Float(0x34cacaca), |
| SkBits2Float(0x2acacaca), SkBits2Float(0xcacacae3), |
| SkBits2Float(0x27481927), SkBits2Float(0x27334805)); |
| path.lineTo(SkBits2Float(0xb5434343), SkBits2Float(0x43434343)); //-7.2741e-07f, 195.263f |
| // 195.263f, 195.263f, -1.16387e-05f, 195.212f, 195.263f, -2 |
| path.cubicTo(SkBits2Float(0x43434343), SkBits2Float(0x43434341), |
| SkBits2Float(0xb74343b9), SkBits2Float(0x43433643), |
| SkBits2Float(0x43434343), SkBits2Float(0xc0000014)); |
| path.lineTo(SkBits2Float(0xc7004343), SkBits2Float(0x27480527)); //-32835.3f, 2.77584e-15f |
| path.lineTo(SkBits2Float(0x00000000), SkBits2Float(0x00000000)); // 0,0 |
| path.close(); |
| canvas->clipRect({0, 0, 65, 202}); |
| canvas->drawPath(path, paint); |
| } |
| |
| DEF_TEST(cubic_scan_error_crbug_844457_and_845489, reporter) { |
| auto surface(SkSurface::MakeRasterN32Premul(100, 100)); |
| SkCanvas* canvas = surface->getCanvas(); |
| SkPaint p; |
| |
| SkPath path; |
| path.moveTo(-30/64.0, -31/64.0); |
| path.cubicTo(-31/64.0, -31/64,-31/64.0, -31/64,-31/64.0, 100); |
| path.lineTo(100, 100); |
| canvas->drawPath(path, p); |
| |
| // May need to define SK_RASTERIZE_EVEN_ROUNDING to trigger the need for this test |
| path.reset(); |
| path.moveTo(-30/64.0f, -31/64.0f + 1/256.0f); |
| path.cubicTo(-31/64.0f + 1/256.0f, -31/64.0f + 1/256.0f, |
| -31/64.0f + 1/256.0f, -31/64.0f + 1/256.0f, |
| -31/64.0f + 1/256.0f, 100); |
| path.lineTo(100, 100); |
| canvas->drawPath(path, p); |
| } |