blob: c58680d85e582d38a461a2a56235d26e3942ae46 [file] [log] [blame]
/*
* 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 "include/private/SkFloatBits.h"
#include "include/private/SkPathRef.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();
}