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/*
* 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 "SkCanvas.h"
#include "SkDashPathEffect.h"
#include "SkImageInfo.h"
#include "SkMatrix.h"
#include "SkPaint.h"
#include "SkPath.h"
#include "SkPathEffect.h"
#include "SkPoint.h"
#include "SkRect.h"
#include "SkRefCnt.h"
#include "SkScalar.h"
#include "SkStrokeRec.h"
#include "SkSurface.h"
#include "SkTypes.h"
#include "Test.h"
// crbug.com/348821 was rooted in SkDashPathEffect refusing to flatten and unflatten itself when
// the effect is nonsense. Here we test that it fails when passed nonsense parameters.
DEF_TEST(DashPathEffectTest_crbug_348821, r) {
SkScalar intervals[] = { 1.76934361e+36f, 2.80259693e-45f }; // Values from bug.
const int count = 2;
SkScalar phase = SK_ScalarInfinity; // Used to force a nonsense effect.
sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, count, phase));
REPORTER_ASSERT(r, dash == nullptr);
}
// Test out the asPoint culling behavior.
DEF_TEST(DashPathEffectTest_asPoints, r) {
const SkScalar intervals[] = { 1.0f, 1.0f };
const int count = 2;
sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, count, 0.0f));
SkRect cull = SkRect::MakeWH(1.0f, 1.0f);
const struct {
SkPoint fPts[2];
bool fExpectedResult;
} testCases[] = {
{ { { -5.0f, 0.5f }, { -4.0f, 0.5f } }, false }, // off to the left
{ { { 4.0f, 0.5f }, { 5.0f, 0.5f } }, false }, // off to the right
{ { { 0.5f, 4.0f }, { 0.5f, 5.0f } }, false }, // off the bottom
{ { { 0.5f, -5.0f }, { 0.5f, -4.0f } }, false }, // off the top
{ { { 0.5f, 0.2f }, { 0.5f, 0.8f } }, true }, // entirely inside vertical
{ { { 0.2f, 0.5f }, { 0.8f, 0.5f } }, true }, // entirely inside horizontal
{ { { 0.5f, -5.0f }, { 0.5f, 5.0f } }, true }, // straddles both sides vertically
{ { { -5.0f, 0.5f }, { 5.0f, 0.5f } }, true }, // straddles both sides horizontally
{ { { 0.5f, -5.0f }, { 0.5f, 0.5f } }, true }, // straddles top
{ { { 0.5f, 5.0f }, { 0.5f, 0.5f } }, true }, // straddles bottom
{ { { -5.0f, 0.5f }, { 0.5f, 0.5f } }, true }, // straddles left
{ { { 5.0f, 0.5f }, { 0.5f, 0.5f } }, true }, // straddles right
{ { { 0.5f, 0.5f }, { 0.5f, 0.5f } }, false }, // zero length
};
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(1.0f);
SkStrokeRec rec(paint);
static const int kNumMats = 3;
SkMatrix mats[kNumMats];
mats[0].reset();
mats[1].setRotate(90, 0.5f, 0.5f);
mats[2].setTranslate(10.0f, 10.0f);
for (int i = 0; i < kNumMats; ++i) {
for (int j = 0; j < (int)SK_ARRAY_COUNT(testCases); ++j) {
for (int k = 0; k < 2; ++k) { // exercise alternating endpoints
SkPathEffect::PointData results;
SkPath src;
src.moveTo(testCases[j].fPts[k]);
src.lineTo(testCases[j].fPts[(k+1)%2]);
bool actualResult = dash->asPoints(&results, src, rec, mats[i], &cull);
if (i < 2) {
REPORTER_ASSERT(r, actualResult == testCases[j].fExpectedResult);
} else {
// On the third pass all the lines should be outside the translated cull rect
REPORTER_ASSERT(r, !actualResult);
}
}
}
}
}
DEF_TEST(DashPath_bug4871, r) {
SkPath path;
path.moveTo(30, 24);
path.cubicTo(30.002f, 24, 30, 24, 30, 24);
path.close();
SkScalar intervals[2] = { 1, 1 };
sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, 2, 0));
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setPathEffect(dash);
SkPath fill;
paint.getFillPath(path, &fill);
}
// Verify that long lines with many dashes don't cause overflows/OOMs.
DEF_TEST(DashPathEffectTest_asPoints_limit, r) {
sk_sp<SkSurface> surface(SkSurface::MakeRaster(SkImageInfo::MakeN32Premul(256, 256)));
SkCanvas* canvas = surface->getCanvas();
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
// force the bounds to outset by a large amount
p.setStrokeWidth(5.0e10f);
const SkScalar intervals[] = { 1, 1 };
p.setPathEffect(SkDashPathEffect::Make(intervals, SK_ARRAY_COUNT(intervals), 0));
canvas->drawLine(1, 1, 1, 5.0e10f, p);
}
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