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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 "SkPaint.h"
#include "SkPath.h"
#include "SkRect.h"
#include "SkStroke.h"
#include "SkStrokeRec.h"
#include "Test.h"
static bool equal(const SkRect& a, const SkRect& b) {
return SkScalarNearlyEqual(a.left(), b.left()) &&
SkScalarNearlyEqual(a.top(), b.top()) &&
SkScalarNearlyEqual(a.right(), b.right()) &&
SkScalarNearlyEqual(a.bottom(), b.bottom());
}
static void test_strokecubic(skiatest::Reporter* reporter) {
uint32_t hexCubicVals[] = {
0x424c1086, 0x44bcf0cb, // fX=51.0161362 fY=1511.52478
0x424c107c, 0x44bcf0cb, // fX=51.0160980 fY=1511.52478
0x424c10c2, 0x44bcf0cb, // fX=51.0163651 fY=1511.52478
0x424c1119, 0x44bcf0ca, // fX=51.0166969 fY=1511.52466
};
SkPoint cubicVals[] = {
{51.0161362f, 1511.52478f },
{51.0160980f, 1511.52478f },
{51.0163651f, 1511.52478f },
{51.0166969f, 1511.52466f },
};
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(0.394537568f);
SkPath path, fillPath;
path.moveTo(cubicVals[0]);
path.cubicTo(cubicVals[1], cubicVals[2], cubicVals[3]);
paint.getFillPath(path, &fillPath);
path.reset();
path.moveTo(SkBits2Float(hexCubicVals[0]), SkBits2Float(hexCubicVals[1]));
path.cubicTo(SkBits2Float(hexCubicVals[2]), SkBits2Float(hexCubicVals[3]),
SkBits2Float(hexCubicVals[4]), SkBits2Float(hexCubicVals[5]),
SkBits2Float(hexCubicVals[6]), SkBits2Float(hexCubicVals[7]));
paint.getFillPath(path, &fillPath);
}
static void test_strokerect(skiatest::Reporter* reporter) {
const SkScalar width = SkIntToScalar(10);
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(width);
SkRect r = { 0, 0, SkIntToScalar(200), SkIntToScalar(100) };
SkRect outer(r);
outer.outset(width/2, width/2);
static const SkPaint::Join joins[] = {
SkPaint::kMiter_Join, SkPaint::kRound_Join, SkPaint::kBevel_Join
};
for (size_t i = 0; i < SK_ARRAY_COUNT(joins); ++i) {
paint.setStrokeJoin(joins[i]);
SkPath path, fillPath;
path.addRect(r);
paint.getFillPath(path, &fillPath);
REPORTER_ASSERT(reporter, equal(outer, fillPath.getBounds()));
bool isMiter = SkPaint::kMiter_Join == joins[i];
SkRect nested[2];
REPORTER_ASSERT(reporter, fillPath.isNestedFillRects(nested) == isMiter);
if (isMiter) {
SkRect inner(r);
inner.inset(width/2, width/2);
REPORTER_ASSERT(reporter, equal(nested[0], outer));
REPORTER_ASSERT(reporter, equal(nested[1], inner));
}
}
}
static void test_strokerec_equality(skiatest::Reporter* reporter) {
{
SkStrokeRec s1(SkStrokeRec::kFill_InitStyle);
SkStrokeRec s2(SkStrokeRec::kFill_InitStyle);
REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2));
// Test that style mismatch is detected.
s2.setHairlineStyle();
REPORTER_ASSERT(reporter, !s1.hasEqualEffect(s2));
s1.setHairlineStyle();
REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2));
// ResScale is not part of equality.
s1.setResScale(2.1f);
s2.setResScale(1.2f);
REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2));
s1.setFillStyle();
s2.setFillStyle();
REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2));
s1.setStrokeStyle(1.0f, false);
s2.setStrokeStyle(1.0f, false);
s1.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.9f);
s2.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.9f);
REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2));
}
// Stroke parameters on fill or hairline style are not part of equality.
{
SkStrokeRec s1(SkStrokeRec::kFill_InitStyle);
SkStrokeRec s2(SkStrokeRec::kFill_InitStyle);
for (int i = 0; i < 2; ++i) {
s1.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.9f);
s2.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.1f);
REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2));
s2.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kBevel_Join, 2.9f);
REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2));
s2.setStrokeParams(SkPaint::kRound_Cap, SkPaint::kRound_Join, 2.9f);
REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2));
s1.setHairlineStyle();
s2.setHairlineStyle();
}
}
// Stroke parameters on stroke style are part of equality.
{
SkStrokeRec s1(SkStrokeRec::kFill_InitStyle);
SkStrokeRec s2(SkStrokeRec::kFill_InitStyle);
s1.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.9f);
s2.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.9f);
s1.setStrokeStyle(1.0f, false);
s2.setStrokeStyle(1.0f, true);
REPORTER_ASSERT(reporter, !s1.hasEqualEffect(s2));
s2.setStrokeStyle(2.1f, false);
REPORTER_ASSERT(reporter, !s1.hasEqualEffect(s2));
s2.setStrokeStyle(1.0f, false);
REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2));
s2.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 2.1f);
REPORTER_ASSERT(reporter, !s1.hasEqualEffect(s2));
s2.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kBevel_Join, 2.9f);
REPORTER_ASSERT(reporter, !s1.hasEqualEffect(s2));
s2.setStrokeParams(SkPaint::kRound_Cap, SkPaint::kRound_Join, 2.9f);
REPORTER_ASSERT(reporter, !s1.hasEqualEffect(s2));
// Sets fill.
s1.setStrokeStyle(0.0f, true);
s2.setStrokeStyle(0.0f, true);
REPORTER_ASSERT(reporter, s1.hasEqualEffect(s2));
}
}
// From skbug.com/6491. The large stroke width can cause numerical instabilities.
static void test_big_stroke(skiatest::Reporter* reporter) {
SkPaint paint;
paint.setStyle(SkPaint::kStrokeAndFill_Style);
paint.setStrokeWidth(1.49679073e+10f);
SkPath path;
path.setFillType(SkPath::kWinding_FillType);
path.moveTo(SkBits2Float(0x46380000), SkBits2Float(0xc6380000)); // 11776, -11776
path.lineTo(SkBits2Float(0x46a00000), SkBits2Float(0xc6a00000)); // 20480, -20480
path.lineTo(SkBits2Float(0x468c0000), SkBits2Float(0xc68c0000)); // 17920, -17920
path.lineTo(SkBits2Float(0x46100000), SkBits2Float(0xc6100000)); // 9216, -9216
path.lineTo(SkBits2Float(0x46380000), SkBits2Float(0xc6380000)); // 11776, -11776
path.close();
SkPath strokeAndFillPath;
paint.getFillPath(path, &strokeAndFillPath);
}
DEF_TEST(Stroke, reporter) {
test_strokecubic(reporter);
test_strokerect(reporter);
test_strokerec_equality(reporter);
test_big_stroke(reporter);
}
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