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skia2/bench/DashBench.cpp
Brian Osman 4428f2c39f Remove SkScalarSinCos 
This differed from the separate versions in that it snapped to zero.
It was also strictly worse than calling the two separate versions.
Most clients don't need the snapping, so just call the two existing
functions. For clients that need the snapping, call new variants of
each that do snap.

Change-Id: Ia4e09fd9651932fe15caeab1399df7f6281bdc17
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/205303
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Reed <reed@google.com>
2019-04-02 15:46:57 +00:00

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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;
path->lineTo(SkScalarCos(rad), SkScalarSin(rad));
}
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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