| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPathBuilder.h" |
| #include "include/core/SkScalar.h" |
| #include "src/base/SkFloatBits.h" |
| #include "src/core/SkPathPriv.h" |
| |
| #define W 800 |
| #define H 800 |
| |
| DEF_SIMPLE_GM(analytic_antialias_convex, canvas, W, H) { |
| SkPaint p; |
| p.setColor(SK_ColorRED); |
| p.setAntiAlias(true); |
| |
| canvas->clear(0xFFFFFFFF); |
| |
| canvas->save(); |
| |
| SkScalar y = 0; |
| |
| canvas->translate(0, y); |
| canvas->rotate(1); |
| canvas->drawRect({ 20, 20, 200, 200 }, p); |
| canvas->restore(); |
| |
| y += 200; |
| |
| canvas->save(); |
| canvas->translate(0, y); |
| canvas->rotate(1); |
| canvas->drawRect({ 20, 20, 20.2f, 200 }, p); |
| canvas->drawRect({ 20, 200, 200, 200.1f }, p); |
| canvas->drawCircle(100, 100, 30, p); |
| canvas->restore(); |
| |
| // The following path is empty but it'll reveal bug chrome:662914 |
| SkPathBuilder pb; |
| pb.moveTo(SkBits2Float(0x429b9d5c), SkBits2Float(0x4367a041)); // 77.8073f, 231.626f |
| // 77.8075f, 231.626f, 77.8074f, 231.625f, 77.8073f, 231.625f |
| pb.cubicTo(SkBits2Float(0x429b9d71), SkBits2Float(0x4367a022), |
| SkBits2Float(0x429b9d64), SkBits2Float(0x4367a009), |
| SkBits2Float(0x429b9d50), SkBits2Float(0x43679ff2)); |
| pb.lineTo(SkBits2Float(0x429b9d5c), SkBits2Float(0x4367a041)); // 77.8073f, 231.626f |
| pb.close(); |
| canvas->drawPath(pb.detach(), p); |
| |
| // The following path reveals a subtle SkAnalyticQuadraticEdge::updateQuadratic bug: |
| // we should not use any snapped y for the intermediate values whose error may accumulate; |
| // snapping should only be allowed once before updateLine. |
| pb.moveTo(SkBits2Float(0x434ba71e), SkBits2Float(0x438a06d0)); // 203.653f, 276.053f |
| pb.lineTo(SkBits2Float(0x43492a74), SkBits2Float(0x4396d70d)); // 201.166f, 301.68f |
| // 200.921f, 304.207f, 196.939f, 303.82f, 0.707107f |
| pb.conicTo(SkBits2Float(0x4348ebaf), SkBits2Float(0x43981a75), |
| SkBits2Float(0x4344f079), SkBits2Float(0x4397e900), SkBits2Float(0x3f3504f3)); |
| pb.close(); |
| SkPath path = pb.detach(); |
| // Manually setting convexity is required. Otherwise, this path will be considered concave. |
| SkPathPriv::SetConvexity(path, SkPathConvexity::kConvex); |
| canvas->drawPath(path, p); |
| |
| // skbug.com/7573 |
| y += 200; |
| canvas->save(); |
| canvas->translate(0, y); |
| p.setAntiAlias(true); |
| pb.moveTo(1.98009784f, 9.0162744f); |
| pb.lineTo(47.843992f, 10.1922744f); |
| pb.lineTo(47.804008f, 11.7597256f); |
| pb.lineTo(1.93990216f, 10.5837256f); |
| canvas->drawPath(pb.detach(), p); |
| canvas->restore(); |
| |
| // skbug.com/7813 |
| // t8888 splits the 800-high canvas into 3 pieces; the boundary is close to 266 and 534 |
| pb.moveTo(700, 266); |
| pb.lineTo(710, 266); |
| pb.lineTo(710, 534); |
| pb.lineTo(700, 534); |
| canvas->drawPath(pb.detach(), p); |
| } |
| |
| DEF_SIMPLE_GM(analytic_antialias_general, canvas, W, H) { |
| SkPaint p; |
| p.setColor(SK_ColorRED); |
| p.setAntiAlias(true); |
| |
| canvas->clear(0xFFFFFFFF); |
| |
| canvas->save(); |
| canvas->rotate(1); |
| const SkScalar R = 115.2f, C = 128.0f; |
| SkPathBuilder builder; |
| builder.moveTo(C + R, C); |
| for (int i = 1; i < 8; ++i) { |
| SkScalar a = 2.6927937f * i; |
| builder.lineTo(C + R * SkScalarCos(a), C + R * SkScalarSin(a)); |
| } |
| SkPath path = builder.detach(); |
| canvas->drawPath(path, p); |
| canvas->restore(); |
| |
| canvas->save(); |
| canvas->translate(200, 0); |
| canvas->rotate(1); |
| p.setStyle(SkPaint::kStroke_Style); |
| p.setStrokeWidth(5); |
| canvas->drawPath(path, p); |
| canvas->restore(); |
| |
| |
| // The following two paths test if we correctly cumulates the alpha on the middle pixel |
| // column where the left rect and the right rect abut. |
| p.setStyle(SkPaint::kFill_Style); |
| canvas->translate(0, 300); |
| canvas->drawPath(SkPathBuilder().addRect({20, 20, 100.4999f, 100}) |
| .addRect({100.5001f, 20, 200, 100}) |
| .detach(), p); |
| |
| canvas->translate(300, 0); |
| canvas->drawPath(SkPathBuilder().addRect({20, 20, 100.1f, 100}) |
| .addRect({100.9f, 20, 200, 100}) |
| .detach(), p); |
| } |
| |
| DEF_SIMPLE_GM(analytic_antialias_inverse, canvas, W, H) { |
| SkPaint p; |
| p.setColor(SK_ColorRED); |
| p.setAntiAlias(true); |
| |
| canvas->save(); |
| |
| SkPath path = SkPath::Circle(100, 100, 30); |
| path.setFillType(SkPathFillType::kInverseWinding); |
| canvas->drawPath(path, p); |
| canvas->restore(); |
| } |