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skia2/bench/DashBench.cpp

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/*
* 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 "Benchmark.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkDashPathEffect.h"
#include "SkPaint.h"
#include "SkPath.h"
#include "SkRandom.h"
#include "SkString.h"
#include "SkStrokeRec.h"
#include "SkTDArray.h"
/*
* Cases to consider:
*
* 1. antialiasing on/off (esp. width <= 1)
* 2. strokewidth == 0, 1, 2
* 3. hline, vline, diagonal, rect, oval
* 4. dots [1,1] ([N,N] where N=strokeWidth?) or arbitrary (e.g. [2,1] or [1,2,3,2])
*/
static void path_hline(SkPath* path) {
path->moveTo(SkIntToScalar(10), SkIntToScalar(10));
path->lineTo(SkIntToScalar(600), SkIntToScalar(10));
}
class DashBench : public Benchmark {
protected:
SkString fName;
SkTDArray<SkScalar> fIntervals;
int fWidth;
SkPoint fPts[2];
bool fDoClip;
public:
DashBench(const SkScalar intervals[], int count, int width,
bool doClip = false) {
fIntervals.append(count, intervals);
for (int i = 0; i < count; ++i) {
fIntervals[i] *= width;
}
fWidth = width;
fName.printf("dash_%d_%s", width, doClip ? "clipped" : "noclip");
fDoClip = doClip;
fPts[0].set(SkIntToScalar(10), SkIntToScalar(10));
fPts[1].set(SkIntToScalar(600), SkIntToScalar(10));
}
virtual void makePath(SkPath* path) {
path_hline(path);
}
protected:
const char* onGetName() override {
return fName.c_str();
}
void onDraw(int loops, SkCanvas* canvas) override {
SkPaint paint;
this->setupPaint(&paint);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SkIntToScalar(fWidth));
paint.setAntiAlias(false);
SkPath path;
this->makePath(&path);
paint.setPathEffect(SkDashPathEffect::Make(fIntervals.begin(), fIntervals.count(), 0));
if (fDoClip) {
SkRect r = path.getBounds();
r.inset(-SkIntToScalar(20), -SkIntToScalar(20));
// now move it so we don't intersect
r.offset(0, r.height() * 3 / 2);
canvas->clipRect(r);
}
this->handlePath(canvas, path, paint, loops);
}
virtual void handlePath(SkCanvas* canvas, const SkPath& path,
const SkPaint& paint, int N) {
for (int i = 0; i < N; ++i) {
// canvas->drawPoints(SkCanvas::kLines_PointMode, 2, fPts, paint);
canvas->drawPath(path, paint);
}
}
private:
typedef Benchmark INHERITED;
};
class RectDashBench : public DashBench {
public:
RectDashBench(const SkScalar intervals[], int count, int width)
: INHERITED(intervals, count, width) {
fName.append("_rect");
}
protected:
virtual void handlePath(SkCanvas* canvas, const SkPath& path,
const SkPaint& paint, int N) override {
SkPoint pts[2];
if (!path.isLine(pts) || pts[0].fY != pts[1].fY) {
this->INHERITED::handlePath(canvas, path, paint, N);
} else {
SkRect rect;
rect.fLeft = pts[0].fX;
rect.fTop = pts[0].fY - paint.getStrokeWidth() / 2;
rect.fRight = rect.fLeft + SkIntToScalar(fWidth);
rect.fBottom = rect.fTop + paint.getStrokeWidth();
SkPaint p(paint);
p.setStyle(SkPaint::kFill_Style);
p.setPathEffect(nullptr);
int count = SkScalarRoundToInt((pts[1].fX - pts[0].fX) / (2*fWidth));
SkScalar dx = SkIntToScalar(2 * fWidth);
for (int i = 0; i < N*10; ++i) {
SkRect r = rect;
for (int j = 0; j < count; ++j) {
canvas->drawRect(r, p);
r.offset(dx, 0);
}
}
}
}
private:
typedef DashBench INHERITED;
};
static void make_unit_star(SkPath* path, int n) {
SkScalar rad = -SK_ScalarPI / 2;
const SkScalar drad = (n >> 1) * SK_ScalarPI * 2 / n;
path->moveTo(0, -SK_Scalar1);
for (int i = 1; i < n; i++) {
rad += drad;
SkScalar cosV, sinV = SkScalarSinCos(rad, &cosV);
path->lineTo(cosV, sinV);
}
path->close();
}
static void make_poly(SkPath* path) {
make_unit_star(path, 9);
const SkMatrix matrix = SkMatrix::MakeScale(SkIntToScalar(100), SkIntToScalar(100));
path->transform(matrix);
}
static void make_quad(SkPath* path) {
SkScalar x0 = SkIntToScalar(10);
SkScalar y0 = SkIntToScalar(10);
path->moveTo(x0, y0);
path->quadTo(x0, y0 + 400 * SK_Scalar1,
x0 + 600 * SK_Scalar1, y0 + 400 * SK_Scalar1);
}
static void make_cubic(SkPath* path) {
SkScalar x0 = SkIntToScalar(10);
SkScalar y0 = SkIntToScalar(10);
path->moveTo(x0, y0);
path->cubicTo(x0, y0 + 400 * SK_Scalar1,
x0 + 600 * SK_Scalar1, y0 + 400 * SK_Scalar1,
x0 + 600 * SK_Scalar1, y0);
}
class MakeDashBench : public Benchmark {
SkString fName;
SkPath fPath;
sk_sp<SkPathEffect> fPE;
public:
MakeDashBench(void (*proc)(SkPath*), const char name[]) {
fName.printf("makedash_%s", name);
proc(&fPath);
SkScalar vals[] = { SkIntToScalar(4), SkIntToScalar(4) };
fPE = SkDashPathEffect::Make(vals, 2, 0);
}
protected:
const char* onGetName() override {
return fName.c_str();
}
void onDraw(int loops, SkCanvas*) override {
SkPath dst;
for (int i = 0; i < loops; ++i) {
SkStrokeRec rec(SkStrokeRec::kHairline_InitStyle);
fPE->filterPath(&dst, fPath, &rec, nullptr);
dst.rewind();
}
}
private:
typedef Benchmark INHERITED;
};
/*
* We try to special case square dashes (intervals are equal to strokewidth).
*/
class DashLineBench : public Benchmark {
SkString fName;
SkScalar fStrokeWidth;
bool fIsRound;
sk_sp<SkPathEffect> fPE;
public:
DashLineBench(SkScalar width, bool isRound) {
fName.printf("dashline_%g_%s", SkScalarToFloat(width), isRound ? "circle" : "square");
fStrokeWidth = width;
fIsRound = isRound;
SkScalar vals[] = { SK_Scalar1, SK_Scalar1 };
fPE = SkDashPathEffect::Make(vals, 2, 0);
}
protected:
const char* onGetName() override {
return fName.c_str();
}
void onDraw(int loops, SkCanvas* canvas) override {
SkPaint paint;
this->setupPaint(&paint);
paint.setStrokeWidth(fStrokeWidth);
paint.setStrokeCap(fIsRound ? SkPaint::kRound_Cap : SkPaint::kSquare_Cap);
paint.setPathEffect(fPE);
for (int i = 0; i < loops; ++i) {
canvas->drawLine(10 * SK_Scalar1, 10 * SK_Scalar1,
640 * SK_Scalar1, 10 * SK_Scalar1, paint);
}
}
private:
typedef Benchmark INHERITED;
};
class DrawPointsDashingBench : public Benchmark {
SkString fName;
int fStrokeWidth;
bool fDoAA;
sk_sp<SkPathEffect> fPathEffect;
public:
DrawPointsDashingBench(int dashLength, int strokeWidth, bool doAA)
{
fName.printf("drawpointsdash_%d_%d%s", dashLength, strokeWidth, doAA ? "_aa" : "_bw");
fStrokeWidth = strokeWidth;
fDoAA = doAA;
SkScalar vals[] = { SkIntToScalar(dashLength), SkIntToScalar(dashLength) };
fPathEffect = SkDashPathEffect::Make(vals, 2, SK_Scalar1);
}
protected:
const char* onGetName() override {
return fName.c_str();
}
void onDraw(int loops, SkCanvas* canvas) override {
SkPaint p;
this->setupPaint(&p);
p.setColor(SK_ColorBLACK);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SkIntToScalar(fStrokeWidth));
p.setPathEffect(fPathEffect);
p.setAntiAlias(fDoAA);
SkPoint pts[2] = {
{ SkIntToScalar(10), 0 },
{ SkIntToScalar(640), 0 }
};
for (int i = 0; i < loops; ++i) {
pts[0].fY = pts[1].fY = SkIntToScalar(i % 480);
canvas->drawPoints(SkCanvas::kLines_PointMode, 2, pts, p);
}
}
private:
typedef Benchmark INHERITED;
};
// Want to test how we handle dashing when 99% of the dash is clipped out
class GiantDashBench : public Benchmark {
SkString fName;
SkScalar fStrokeWidth;
SkPoint fPts[2];
sk_sp<SkPathEffect> fPathEffect;
public:
enum LineType {
kHori_LineType,
kVert_LineType,
kDiag_LineType,
kLineTypeCount
};
static const char* LineTypeName(LineType lt) {
static const char* gNames[] = { "hori", "vert", "diag" };
static_assert(kLineTypeCount == SK_ARRAY_COUNT(gNames), "names_wrong_size");
return gNames[lt];
}
GiantDashBench(LineType lt, SkScalar width) {
fName.printf("giantdashline_%s_%g", LineTypeName(lt), width);
fStrokeWidth = width;
// deliberately pick intervals that won't be caught by asPoints(), so
// we can test the filterPath code-path.
const SkScalar intervals[] = { 20, 10, 10, 10 };
fPathEffect = SkDashPathEffect::Make(intervals, SK_ARRAY_COUNT(intervals), 0);
SkScalar cx = 640 / 2; // center X
SkScalar cy = 480 / 2; // center Y
SkMatrix matrix;
switch (lt) {
case kHori_LineType:
matrix.setIdentity();
break;
case kVert_LineType:
matrix.setRotate(90, cx, cy);
break;
case kDiag_LineType:
matrix.setRotate(45, cx, cy);
break;
case kLineTypeCount:
// Not a real enum value.
break;
}
const SkScalar overshoot = 100*1000;
const SkPoint pts[2] = {
{ -overshoot, cy }, { 640 + overshoot, cy }
};
matrix.mapPoints(fPts, pts, 2);
}
protected:
const char* onGetName() override {
return fName.c_str();
}
void onDraw(int loops, SkCanvas* canvas) override {
SkPaint p;
this->setupPaint(&p);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(fStrokeWidth);
p.setPathEffect(fPathEffect);
for (int i = 0; i < loops; i++) {
canvas->drawPoints(SkCanvas::kLines_PointMode, 2, fPts, p);
}
}
private:
typedef Benchmark INHERITED;
};
// Want to test how we draw a dashed grid (like what is used in spreadsheets) of many
// small dashed lines switching back and forth between horizontal and vertical
class DashGridBench : public Benchmark {
SkString fName;
int fStrokeWidth;
bool fDoAA;
sk_sp<SkPathEffect> fPathEffect;
public:
DashGridBench(int dashLength, int strokeWidth, bool doAA) {
fName.printf("dashgrid_%d_%d%s", dashLength, strokeWidth, doAA ? "_aa" : "_bw");
fStrokeWidth = strokeWidth;
fDoAA = doAA;
SkScalar vals[] = { SkIntToScalar(dashLength), SkIntToScalar(dashLength) };
fPathEffect = SkDashPathEffect::Make(vals, 2, SK_Scalar1);
}
protected:
const char* onGetName() override {
return fName.c_str();
}
void onDraw(int loops, SkCanvas* canvas) override {
SkPaint p;
this->setupPaint(&p);
p.setColor(SK_ColorBLACK);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SkIntToScalar(fStrokeWidth));
p.setPathEffect(fPathEffect);
p.setAntiAlias(fDoAA);
SkPoint pts[4] = {
{ SkIntToScalar(0), 20.5f },
{ SkIntToScalar(20), 20.5f },
{ 20.5f, SkIntToScalar(0) },
{ 20.5f, SkIntToScalar(20) }
};
for (int i = 0; i < loops; ++i) {
for (int j = 0; j < 10; ++j) {
for (int k = 0; k < 10; ++k) {
// Horizontal line
SkPoint horPts[2];
horPts[0].fX = pts[0].fX + k * 22.f;
horPts[0].fY = pts[0].fY + j * 22.f;
horPts[1].fX = pts[1].fX + k * 22.f;
horPts[1].fY = pts[1].fY + j * 22.f;
canvas->drawPoints(SkCanvas::kLines_PointMode, 2, horPts, p);
// Vertical line
SkPoint vertPts[2];
vertPts[0].fX = pts[2].fX + k * 22.f;
vertPts[0].fY = pts[2].fY + j * 22.f;
vertPts[1].fX = pts[3].fX + k * 22.f;
vertPts[1].fY = pts[3].fY + j * 22.f;
canvas->drawPoints(SkCanvas::kLines_PointMode, 2, vertPts, p);
}
}
}
}
private:
typedef Benchmark INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
static const SkScalar gDots[] = { SK_Scalar1, SK_Scalar1 };
#define PARAM(array) array, SK_ARRAY_COUNT(array)
DEF_BENCH( return new DashBench(PARAM(gDots), 0); )
DEF_BENCH( return new DashBench(PARAM(gDots), 1); )
DEF_BENCH( return new DashBench(PARAM(gDots), 1, true); )
DEF_BENCH( return new DashBench(PARAM(gDots), 4); )
DEF_BENCH( return new MakeDashBench(make_poly, "poly"); )
DEF_BENCH( return new MakeDashBench(make_quad, "quad"); )
DEF_BENCH( return new MakeDashBench(make_cubic, "cubic"); )
DEF_BENCH( return new DashLineBench(0, false); )
DEF_BENCH( return new DashLineBench(SK_Scalar1, false); )
DEF_BENCH( return new DashLineBench(2 * SK_Scalar1, false); )
DEF_BENCH( return new DashLineBench(0, true); )
DEF_BENCH( return new DashLineBench(SK_Scalar1, true); )
DEF_BENCH( return new DashLineBench(2 * SK_Scalar1, true); )
DEF_BENCH( return new DrawPointsDashingBench(1, 1, false); )
DEF_BENCH( return new DrawPointsDashingBench(1, 1, true); )
DEF_BENCH( return new DrawPointsDashingBench(3, 1, false); )
DEF_BENCH( return new DrawPointsDashingBench(3, 1, true); )
DEF_BENCH( return new DrawPointsDashingBench(5, 5, false); )
DEF_BENCH( return new DrawPointsDashingBench(5, 5, true); )
/* Disable the GiantDashBench for Android devices until we can better control
* the memory usage. (https://code.google.com/p/skia/issues/detail?id=1430)
*/
#ifndef SK_BUILD_FOR_ANDROID
DEF_BENCH( return new GiantDashBench(GiantDashBench::kHori_LineType, 0); )
DEF_BENCH( return new GiantDashBench(GiantDashBench::kVert_LineType, 0); )
DEF_BENCH( return new GiantDashBench(GiantDashBench::kDiag_LineType, 0); )
// pass 2 to explicitly avoid any 1-is-the-same-as-hairline special casing
// hori_2 is just too slow to enable at the moment
DEF_BENCH( return new GiantDashBench(GiantDashBench::kHori_LineType, 2); )
DEF_BENCH( return new GiantDashBench(GiantDashBench::kVert_LineType, 2); )
DEF_BENCH( return new GiantDashBench(GiantDashBench::kDiag_LineType, 2); )
DEF_BENCH( return new DashGridBench(1, 1, true); )
DEF_BENCH( return new DashGridBench(1, 1, false); )
DEF_BENCH( return new DashGridBench(3, 1, true); )
DEF_BENCH( return new DashGridBench(3, 1, false); )
#endif
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