bench/DashBench.cpp - platform/external/skqp - Gitiles


 /*
  * 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 "SkBenchmark.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkDashPathEffect.h"
 #include "SkPaint.h"
 #include "SkPath.h"
 #include "SkRandom.h"
 #include "SkString.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 SkBenchmark {
 protected:
     SkString            fName;
     SkTDArray<SkScalar> fIntervals;
     int                 fWidth;
     SkPoint             fPts[2];
     bool                fDoClip;

     enum {
         N = SkBENCHLOOP(100)
     };
 public:
     DashBench(void* param, const SkScalar intervals[], int count, int width,
               bool doClip = false) : INHERITED(param) {
         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:
     virtual const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
     }

     virtual void onDraw(SkCanvas* canvas) SK_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(new SkDashPathEffect(fIntervals.begin(),
                                                  fIntervals.count(), 0))->unref();

         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, N);
     }

     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 SkBenchmark INHERITED;
 };

 class RectDashBench : public DashBench {
 public:
     RectDashBench(void* param, const SkScalar intervals[], int count, int width)
     : INHERITED(param, intervals, count, width) {
         fName.append("_rect");
     }

 protected:
     virtual void handlePath(SkCanvas* canvas, const SkPath& path,
                             const SkPaint& paint, int N) SK_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(NULL);

             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);
     SkMatrix matrix;
     matrix.setScale(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 SkBenchmark {
     SkString fName;
     SkPath   fPath;
     SkAutoTUnref<SkPathEffect> fPE;

     enum {
         N = SkBENCHLOOP(400)
     };

 public:
     MakeDashBench(void* param, void (*proc)(SkPath*), const char name[]) : INHERITED(param) {
         fName.printf("makedash_%s", name);
         proc(&fPath);

         SkScalar vals[] = { SkIntToScalar(4), SkIntToScalar(4) };
         fPE.reset(new SkDashPathEffect(vals, 2, 0));
     }

 protected:
     virtual const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
     }

     virtual void onDraw(SkCanvas*) SK_OVERRIDE {
         SkPath dst;
         for (int i = 0; i < N; ++i) {
             SkStrokeRec rec(SkStrokeRec::kHairline_InitStyle);

             fPE->filterPath(&dst, fPath, &rec, NULL);
             dst.rewind();
         }
     }

 private:
     typedef SkBenchmark INHERITED;
 };

 /*
  *  We try to special case square dashes (intervals are equal to strokewidth).
  */
 class DashLineBench : public SkBenchmark {
     SkString fName;
     SkScalar fStrokeWidth;
     bool     fIsRound;
     SkAutoTUnref<SkPathEffect> fPE;

     enum {
         N = SkBENCHLOOP(200)
     };

 public:
     DashLineBench(void* param, SkScalar width, bool isRound) : INHERITED(param) {
         fName.printf("dashline_%g_%s", SkScalarToFloat(width), isRound ? "circle" : "square");
         fStrokeWidth = width;
         fIsRound = isRound;

         SkScalar vals[] = { SK_Scalar1, SK_Scalar1 };
         fPE.reset(new SkDashPathEffect(vals, 2, 0));
     }

 protected:
     virtual const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
     }

     virtual void onDraw(SkCanvas* canvas) SK_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 < N; ++i) {
             canvas->drawLine(10 * SK_Scalar1, 10 * SK_Scalar1,
                              640 * SK_Scalar1, 10 * SK_Scalar1, paint);
         }
     }

 private:
     typedef SkBenchmark INHERITED;
 };

 class DrawPointsDashingBench : public SkBenchmark {
     SkString fName;
     int      fStrokeWidth;
     bool     fDoAA;

     SkAutoTUnref<SkPathEffect> fPathEffect;

     enum {
         N = SkBENCHLOOP(480)
     };

 public:
     DrawPointsDashingBench(void* param, int dashLength, int strokeWidth, bool doAA)
         : INHERITED(param) {
         fName.printf("drawpointsdash_%d_%d%s", dashLength, strokeWidth, doAA ? "_aa" : "_bw");
         fStrokeWidth = strokeWidth;
         fDoAA = doAA;

         SkScalar vals[] = { SkIntToScalar(dashLength), SkIntToScalar(dashLength) };
         fPathEffect.reset(new SkDashPathEffect(vals, 2, SK_Scalar1, false));
     }

 protected:
     virtual const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
     }

     virtual void onDraw(SkCanvas* canvas) SK_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 < N; ++i) {

             pts[0].fY = pts[1].fY = SkIntToScalar(i % 480);
             canvas->drawPoints(SkCanvas::kLines_PointMode, 2, pts, p);
         }
     }

 private:
     typedef SkBenchmark INHERITED;
 };

 // Want to test how we handle dashing when 99% of the dash is clipped out
 class GiantDashBench : public SkBenchmark {
     SkString fName;
     SkScalar fStrokeWidth;
     SkPoint  fPts[2];
     SkAutoTUnref<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" };
         SK_COMPILE_ASSERT(kLineTypeCount == SK_ARRAY_COUNT(gNames), names_wrong_size);
         return gNames[lt];
     }

     GiantDashBench(void* param, LineType lt, SkScalar width) : INHERITED(param) {
         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[] = { 2, 1, 1, 1 };
         fPathEffect.reset(new SkDashPathEffect(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:
     virtual const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
     }

     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         SkPaint p;
         this->setupPaint(&p);
         p.setStyle(SkPaint::kStroke_Style);
         p.setStrokeWidth(fStrokeWidth);
         p.setPathEffect(fPathEffect);

         canvas->drawPoints(SkCanvas::kLines_PointMode, 2, fPts, p);
     }

 private:
     typedef SkBenchmark INHERITED;
 };


 ///////////////////////////////////////////////////////////////////////////////

 static const SkScalar gDots[] = { SK_Scalar1, SK_Scalar1 };

 #define PARAM(array)    array, SK_ARRAY_COUNT(array)

 DEF_BENCH( return new DashBench(p, PARAM(gDots), 0); )
 DEF_BENCH( return new DashBench(p, PARAM(gDots), 1); )
 DEF_BENCH( return new DashBench(p, PARAM(gDots), 1, true); )
 DEF_BENCH( return new DashBench(p, PARAM(gDots), 4); )
 DEF_BENCH( return new MakeDashBench(p, make_poly, "poly"); )
 DEF_BENCH( return new MakeDashBench(p, make_quad, "quad"); )
 DEF_BENCH( return new MakeDashBench(p, make_cubic, "cubic"); )
 DEF_BENCH( return new DashLineBench(p, 0, false); )
 DEF_BENCH( return new DashLineBench(p, SK_Scalar1, false); )
 DEF_BENCH( return new DashLineBench(p, 2 * SK_Scalar1, false); )
 DEF_BENCH( return new DashLineBench(p, 0, true); )
 DEF_BENCH( return new DashLineBench(p, SK_Scalar1, true); )
 DEF_BENCH( return new DashLineBench(p, 2 * SK_Scalar1, true); )

 DEF_BENCH( return new DrawPointsDashingBench(p, 1, 1, false); )
 DEF_BENCH( return new DrawPointsDashingBench(p, 1, 1, true); )
 DEF_BENCH( return new DrawPointsDashingBench(p, 3, 1, false); )
 DEF_BENCH( return new DrawPointsDashingBench(p, 3, 1, true); )
 DEF_BENCH( return new DrawPointsDashingBench(p, 5, 5, false); )
 DEF_BENCH( return new DrawPointsDashingBench(p, 5, 5, true); )

 DEF_BENCH( return new GiantDashBench(p, GiantDashBench::kHori_LineType, 0); )
 DEF_BENCH( return new GiantDashBench(p, GiantDashBench::kVert_LineType, 0); )
 DEF_BENCH( return new GiantDashBench(p, 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(p, GiantDashBench::kHori_LineType, 2); )
 DEF_BENCH( return new GiantDashBench(p, GiantDashBench::kVert_LineType, 2); )
 DEF_BENCH( return new GiantDashBench(p, GiantDashBench::kDiag_LineType, 2); )

	/*
	* 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 "SkBenchmark.h"
	#include "SkBitmap.h"
	#include "SkCanvas.h"
	#include "SkDashPathEffect.h"
	#include "SkPaint.h"
	#include "SkPath.h"
	#include "SkRandom.h"
	#include "SkString.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 SkBenchmark {
	protected:
	SkString fName;
	SkTDArray<SkScalar> fIntervals;
	int fWidth;
	SkPoint fPts[2];
	bool fDoClip;

	enum {
	N = SkBENCHLOOP(100)
	};
	public:
	DashBench(void* param, const SkScalar intervals[], int count, int width,
	bool doClip = false) : INHERITED(param) {
	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:
	virtual const char* onGetName() SK_OVERRIDE {
	return fName.c_str();
	}

	virtual void onDraw(SkCanvas* canvas) SK_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(new SkDashPathEffect(fIntervals.begin(),
	fIntervals.count(), 0))->unref();

	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, N);
	}

	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 SkBenchmark INHERITED;
	};

	class RectDashBench : public DashBench {
	public:
	RectDashBench(void* param, const SkScalar intervals[], int count, int width)
	: INHERITED(param, intervals, count, width) {
	fName.append("_rect");
	}

	protected:
	virtual void handlePath(SkCanvas* canvas, const SkPath& path,
	const SkPaint& paint, int N) SK_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(NULL);

	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);
	SkMatrix matrix;
	matrix.setScale(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 SkBenchmark {
	SkString fName;
	SkPath fPath;
	SkAutoTUnref<SkPathEffect> fPE;

	enum {
	N = SkBENCHLOOP(400)
	};

	public:
	MakeDashBench(void* param, void (proc)(SkPath), const char name[]) : INHERITED(param) {
	fName.printf("makedash_%s", name);
	proc(&fPath);

	SkScalar vals[] = { SkIntToScalar(4), SkIntToScalar(4) };
	fPE.reset(new SkDashPathEffect(vals, 2, 0));
	}

	protected:
	virtual const char* onGetName() SK_OVERRIDE {
	return fName.c_str();
	}

	virtual void onDraw(SkCanvas*) SK_OVERRIDE {
	SkPath dst;
	for (int i = 0; i < N; ++i) {
	SkStrokeRec rec(SkStrokeRec::kHairline_InitStyle);

	fPE->filterPath(&dst, fPath, &rec, NULL);
	dst.rewind();
	}
	}

	private:
	typedef SkBenchmark INHERITED;
	};

	/*
	* We try to special case square dashes (intervals are equal to strokewidth).
	*/
	class DashLineBench : public SkBenchmark {
	SkString fName;
	SkScalar fStrokeWidth;
	bool fIsRound;
	SkAutoTUnref<SkPathEffect> fPE;

	enum {
	N = SkBENCHLOOP(200)
	};

	public:
	DashLineBench(void* param, SkScalar width, bool isRound) : INHERITED(param) {
	fName.printf("dashline_%g_%s", SkScalarToFloat(width), isRound ? "circle" : "square");
	fStrokeWidth = width;
	fIsRound = isRound;

	SkScalar vals[] = { SK_Scalar1, SK_Scalar1 };
	fPE.reset(new SkDashPathEffect(vals, 2, 0));
	}

	protected:
	virtual const char* onGetName() SK_OVERRIDE {
	return fName.c_str();
	}

	virtual void onDraw(SkCanvas* canvas) SK_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 < N; ++i) {
	canvas->drawLine(10 * SK_Scalar1, 10 * SK_Scalar1,
	640 * SK_Scalar1, 10 * SK_Scalar1, paint);
	}
	}

	private:
	typedef SkBenchmark INHERITED;
	};

	class DrawPointsDashingBench : public SkBenchmark {
	SkString fName;
	int fStrokeWidth;
	bool fDoAA;

	SkAutoTUnref<SkPathEffect> fPathEffect;

	enum {
	N = SkBENCHLOOP(480)
	};

	public:
	DrawPointsDashingBench(void* param, int dashLength, int strokeWidth, bool doAA)
	: INHERITED(param) {
	fName.printf("drawpointsdash_%d_%d%s", dashLength, strokeWidth, doAA ? "_aa" : "_bw");
	fStrokeWidth = strokeWidth;
	fDoAA = doAA;

	SkScalar vals[] = { SkIntToScalar(dashLength), SkIntToScalar(dashLength) };
	fPathEffect.reset(new SkDashPathEffect(vals, 2, SK_Scalar1, false));
	}

	protected:
	virtual const char* onGetName() SK_OVERRIDE {
	return fName.c_str();
	}

	virtual void onDraw(SkCanvas* canvas) SK_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 < N; ++i) {

	pts[0].fY = pts[1].fY = SkIntToScalar(i % 480);
	canvas->drawPoints(SkCanvas::kLines_PointMode, 2, pts, p);
	}
	}

	private:
	typedef SkBenchmark INHERITED;
	};

	// Want to test how we handle dashing when 99% of the dash is clipped out
	class GiantDashBench : public SkBenchmark {
	SkString fName;
	SkScalar fStrokeWidth;
	SkPoint fPts[2];
	SkAutoTUnref<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" };
	SK_COMPILE_ASSERT(kLineTypeCount == SK_ARRAY_COUNT(gNames), names_wrong_size);
	return gNames[lt];
	}

	GiantDashBench(void* param, LineType lt, SkScalar width) : INHERITED(param) {
	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[] = { 2, 1, 1, 1 };
	fPathEffect.reset(new SkDashPathEffect(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:
	virtual const char* onGetName() SK_OVERRIDE {
	return fName.c_str();
	}

	virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
	SkPaint p;
	this->setupPaint(&p);
	p.setStyle(SkPaint::kStroke_Style);
	p.setStrokeWidth(fStrokeWidth);
	p.setPathEffect(fPathEffect);

	canvas->drawPoints(SkCanvas::kLines_PointMode, 2, fPts, p);
	}

	private:
	typedef SkBenchmark INHERITED;
	};


	///////////////////////////////////////////////////////////////////////////////

	static const SkScalar gDots[] = { SK_Scalar1, SK_Scalar1 };

	#define PARAM(array) array, SK_ARRAY_COUNT(array)

	DEF_BENCH( return new DashBench(p, PARAM(gDots), 0); )
	DEF_BENCH( return new DashBench(p, PARAM(gDots), 1); )
	DEF_BENCH( return new DashBench(p, PARAM(gDots), 1, true); )
	DEF_BENCH( return new DashBench(p, PARAM(gDots), 4); )
	DEF_BENCH( return new MakeDashBench(p, make_poly, "poly"); )
	DEF_BENCH( return new MakeDashBench(p, make_quad, "quad"); )
	DEF_BENCH( return new MakeDashBench(p, make_cubic, "cubic"); )
	DEF_BENCH( return new DashLineBench(p, 0, false); )
	DEF_BENCH( return new DashLineBench(p, SK_Scalar1, false); )
	DEF_BENCH( return new DashLineBench(p, 2 * SK_Scalar1, false); )
	DEF_BENCH( return new DashLineBench(p, 0, true); )
	DEF_BENCH( return new DashLineBench(p, SK_Scalar1, true); )
	DEF_BENCH( return new DashLineBench(p, 2 * SK_Scalar1, true); )

	DEF_BENCH( return new DrawPointsDashingBench(p, 1, 1, false); )
	DEF_BENCH( return new DrawPointsDashingBench(p, 1, 1, true); )
	DEF_BENCH( return new DrawPointsDashingBench(p, 3, 1, false); )
	DEF_BENCH( return new DrawPointsDashingBench(p, 3, 1, true); )
	DEF_BENCH( return new DrawPointsDashingBench(p, 5, 5, false); )
	DEF_BENCH( return new DrawPointsDashingBench(p, 5, 5, true); )

	DEF_BENCH( return new GiantDashBench(p, GiantDashBench::kHori_LineType, 0); )
	DEF_BENCH( return new GiantDashBench(p, GiantDashBench::kVert_LineType, 0); )
	DEF_BENCH( return new GiantDashBench(p, 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(p, GiantDashBench::kHori_LineType, 2); )
	DEF_BENCH( return new GiantDashBench(p, GiantDashBench::kVert_LineType, 2); )
	DEF_BENCH( return new GiantDashBench(p, GiantDashBench::kDiag_LineType, 2); )