gm/smallpaths.cpp - platform/external/skia - Gitiles

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #include "gm.h"
 #include "SkPath.h"

 typedef SkScalar (*MakePathProc)(SkPath*);

 static SkScalar make_triangle(SkPath* path) {
     constexpr int gCoord[] = {
         10, 20, 15, 5, 30, 30
     };
     path->moveTo(SkIntToScalar(gCoord[0]), SkIntToScalar(gCoord[1]));
     path->lineTo(SkIntToScalar(gCoord[2]), SkIntToScalar(gCoord[3]));
     path->lineTo(SkIntToScalar(gCoord[4]), SkIntToScalar(gCoord[5]));
     path->close();
     path->offset(SkIntToScalar(10), SkIntToScalar(0));
     return SkIntToScalar(30);
 }

 static SkScalar make_rect(SkPath* path) {
     SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
                  SkIntToScalar(30), SkIntToScalar(30) };
     path->addRect(r);
     path->offset(SkIntToScalar(10), SkIntToScalar(0));
     return SkIntToScalar(30);
 }

 static SkScalar make_oval(SkPath* path) {
     SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
                  SkIntToScalar(30), SkIntToScalar(30) };
     path->addOval(r);
     path->offset(SkIntToScalar(10), SkIntToScalar(0));
     return SkIntToScalar(30);
 }

 static SkScalar make_star(SkPath* path, int n) {
     const SkScalar c = SkIntToScalar(45);
     const SkScalar r = SkIntToScalar(20);

     SkScalar rad = -SK_ScalarPI / 2;
     const SkScalar drad = (n >> 1) * SK_ScalarPI * 2 / n;

     path->moveTo(c, c - r);
     for (int i = 1; i < n; i++) {
         rad += drad;
         SkScalar cosV, sinV = SkScalarSinCos(rad, &cosV);
         path->lineTo(c + cosV * r, c + sinV * r);
     }
     path->close();
     return r * 2 * 6 / 5;
 }

 static SkScalar make_star_5(SkPath* path) { return make_star(path, 5); }
 static SkScalar make_star_13(SkPath* path) { return make_star(path, 13); }

 static SkScalar make_three_line(SkPath* path) {
     static SkScalar xOffset = 34.f;
     static SkScalar yOffset = 50.f;
     path->moveTo(-32.5f + xOffset, 0.0f + yOffset);
     path->lineTo(32.5f + xOffset, 0.0f + yOffset);

     path->moveTo(-32.5f + xOffset, 19 + yOffset);
     path->lineTo(32.5f + xOffset, 19 + yOffset);

     path->moveTo(-32.5f + xOffset, -19 + yOffset);
     path->lineTo(32.5f + xOffset, -19 + yOffset);
     path->lineTo(-32.5f + xOffset, -19 + yOffset);

     path->close();

     return SkIntToScalar(70);
 }

 static SkScalar make_arrow(SkPath* path) {
     static SkScalar xOffset = 34.f;
     static SkScalar yOffset = 40.f;
     path->moveTo(-26.f + xOffset, 0.0f + yOffset);
     path->lineTo(26.f + xOffset, 0.0f + yOffset);

     path->moveTo(-28.f + xOffset, -2.4748745f + yOffset);
     path->lineTo(0 + xOffset, 25.525126f + yOffset);

     path->moveTo(-28.f + xOffset, 2.4748745f + yOffset);
     path->lineTo(0 + xOffset, -25.525126f + yOffset);
     path->lineTo(-28.f + xOffset, 2.4748745f + yOffset);

     path->close();

     return SkIntToScalar(70);
 }

 static SkScalar make_curve(SkPath* path) {
     static SkScalar xOffset = -382.f;
     static SkScalar yOffset = -50.f;
     path->moveTo(491 + xOffset, 56 + yOffset);
     path->conicTo(435.93292f + xOffset, 56.000031f + yOffset,
                   382.61078f + xOffset, 69.752716f + yOffset,
                   0.9920463f);

     return SkIntToScalar(40);
 }

 static SkScalar make_battery(SkPath* path) {
     static SkScalar xOffset = 5.0f;

     path->moveTo(24.67f + xOffset, 0.33000004f);
     path->lineTo(8.3299999f + xOffset, 0.33000004f);
     path->lineTo(8.3299999f + xOffset, 5.3299999f);
     path->lineTo(0.33000004f + xOffset, 5.3299999f);
     path->lineTo(0.33000004f + xOffset, 50.669998f);
     path->lineTo(32.669998f + xOffset, 50.669998f);
     path->lineTo(32.669998f + xOffset, 5.3299999f);
     path->lineTo(24.67f + xOffset, 5.3299999f);
     path->lineTo(24.67f + xOffset, 0.33000004f);
     path->close();

     path->moveTo(25.727224f + xOffset, 12.886665f);
     path->lineTo(10.907918f + xOffset, 12.886665f);
     path->lineTo(7.5166659f + xOffset, 28.683645f);
     path->lineTo(14.810181f + xOffset, 28.683645f);
     path->lineTo(7.7024879f + xOffset, 46.135998f);
     path->lineTo(28.049999f + xOffset, 25.136419f);
     path->lineTo(16.854223f + xOffset, 25.136419f);
     path->lineTo(25.727224f + xOffset, 12.886665f);
     path->close();
     return SkIntToScalar(50);
 }

 static SkScalar make_battery2(SkPath* path) {
     static SkScalar xOffset = 225.625f;

     path->moveTo(32.669998f + xOffset, 9.8640003f);
     path->lineTo(0.33000004f + xOffset, 9.8640003f);
     path->lineTo(0.33000004f + xOffset, 50.669998f);
     path->lineTo(32.669998f + xOffset, 50.669998f);
     path->lineTo(32.669998f + xOffset, 9.8640003f);
     path->close();

     path->moveTo(10.907918f + xOffset, 12.886665f);
     path->lineTo(25.727224f + xOffset, 12.886665f);
     path->lineTo(16.854223f + xOffset, 25.136419f);
     path->lineTo(28.049999f + xOffset, 25.136419f);
     path->lineTo(7.7024879f + xOffset, 46.135998f);
     path->lineTo(14.810181f + xOffset, 28.683645f);
     path->lineTo(7.5166659f + xOffset, 28.683645f);
     path->lineTo(10.907918f + xOffset, 12.886665f);
     path->close();

     return SkIntToScalar(70);
 }

 constexpr MakePathProc gProcs[] = {
     make_triangle,
     make_rect,
     make_oval,
     make_star_5,
     make_star_13,
     make_three_line,
     make_arrow,
     make_curve,
     make_battery,
     make_battery2
 };

 constexpr SkScalar gWidths[] = {
     2.0f,
     3.0f,
     4.0f,
     5.0f,
     6.0f,
     7.0f,
     7.0f,
     14.0f,
     0.0f,
     0.0f,
 };

 constexpr SkScalar gMiters[] = {
     2.0f,
     3.0f,
     3.0f,
     3.0f,
     4.0f,
     4.0f,
     4.0f,
     4.0f,
     4.0f,
     4.0f,
 };

 constexpr SkScalar gXTranslate[] = {
     0.0f,
     0.0f,
     0.0f,
     0.0f,
     0.0f,
     0.0f,
     0.0f,
     0.0f,
     -220.625f,
     0.0f,
 };

 #define N   SK_ARRAY_COUNT(gProcs)

 // This GM tests out drawing small paths (i.e., for Ganesh, using the Distance
 // Field path renderer) which are filled, stroked and filledAndStroked. In
 // particular this ensures that any cache keys in use include the stroking
 // parameters.
 class SmallPathsGM : public skiagm::GM {
     SkPath  fPath[N];
     SkScalar fDY[N];
 protected:
     void onOnceBeforeDraw() override {
         for (size_t i = 0; i < N; i++) {
             fDY[i] = gProcs[i](&fPath[i]);
         }
     }

     SkString onShortName() override {
         return SkString("smallpaths");
     }

     SkISize onISize() override {
         return SkISize::Make(640, 480);
     }

     void onDraw(SkCanvas* canvas) override {
         SkPaint paint;
         paint.setAntiAlias(true);

         // first column: filled paths
         canvas->save();
         for (size_t i = 0; i < N; i++) {
             canvas->drawPath(fPath[i], paint);
             canvas->translate(gXTranslate[i], fDY[i]);
         }
         canvas->restore();
         canvas->translate(SkIntToScalar(120), SkIntToScalar(0));

         // second column: stroked paths
         canvas->save();
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setStrokeCap(SkPaint::kButt_Cap);
         for (size_t i = 0; i < N; i++) {
             paint.setStrokeWidth(gWidths[i]);
             paint.setStrokeMiter(gMiters[i]);
             canvas->drawPath(fPath[i], paint);
             canvas->translate(gXTranslate[i], fDY[i]);
         }
         canvas->restore();
         canvas->translate(SkIntToScalar(120), SkIntToScalar(0));

         // third column: stroked paths with different widths
         canvas->save();
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setStrokeCap(SkPaint::kButt_Cap);
         for (size_t i = 0; i < N; i++) {
             paint.setStrokeWidth(gWidths[i] + 2.0f);
             paint.setStrokeMiter(gMiters[i]);
             canvas->drawPath(fPath[i], paint);
             canvas->translate(gXTranslate[i], fDY[i]);
         }
         canvas->restore();
         canvas->translate(SkIntToScalar(120), SkIntToScalar(0));

         // fourth column: stroked and filled paths
         paint.setStyle(SkPaint::kStrokeAndFill_Style);
         paint.setStrokeCap(SkPaint::kButt_Cap);
         for (size_t i = 0; i < N; i++) {
             paint.setStrokeWidth(gWidths[i]);
             paint.setStrokeMiter(gMiters[i]);
             canvas->drawPath(fPath[i], paint);
             canvas->translate(gXTranslate[i], fDY[i]);
         }

     }

 private:
     typedef skiagm::GM INHERITED;
 };

 DEF_GM(return new SmallPathsGM;)
	/*
	* Copyright 2015 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#include "gm.h"
	#include "SkPath.h"

	typedef SkScalar (MakePathProc)(SkPath);

	static SkScalar make_triangle(SkPath* path) {
	constexpr int gCoord[] = {
	10, 20, 15, 5, 30, 30
	};
	path->moveTo(SkIntToScalar(gCoord[0]), SkIntToScalar(gCoord[1]));
	path->lineTo(SkIntToScalar(gCoord[2]), SkIntToScalar(gCoord[3]));
	path->lineTo(SkIntToScalar(gCoord[4]), SkIntToScalar(gCoord[5]));
	path->close();
	path->offset(SkIntToScalar(10), SkIntToScalar(0));
	return SkIntToScalar(30);
	}

	static SkScalar make_rect(SkPath* path) {
	SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
	SkIntToScalar(30), SkIntToScalar(30) };
	path->addRect(r);
	path->offset(SkIntToScalar(10), SkIntToScalar(0));
	return SkIntToScalar(30);
	}

	static SkScalar make_oval(SkPath* path) {
	SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
	SkIntToScalar(30), SkIntToScalar(30) };
	path->addOval(r);
	path->offset(SkIntToScalar(10), SkIntToScalar(0));
	return SkIntToScalar(30);
	}

	static SkScalar make_star(SkPath* path, int n) {
	const SkScalar c = SkIntToScalar(45);
	const SkScalar r = SkIntToScalar(20);

	SkScalar rad = -SK_ScalarPI / 2;
	const SkScalar drad = (n >> 1) * SK_ScalarPI * 2 / n;

	path->moveTo(c, c - r);
	for (int i = 1; i < n; i++) {
	rad += drad;
	SkScalar cosV, sinV = SkScalarSinCos(rad, &cosV);
	path->lineTo(c + cosV * r, c + sinV * r);
	}
	path->close();
	return r * 2 * 6 / 5;
	}

	static SkScalar make_star_5(SkPath* path) { return make_star(path, 5); }
	static SkScalar make_star_13(SkPath* path) { return make_star(path, 13); }

	static SkScalar make_three_line(SkPath* path) {
	static SkScalar xOffset = 34.f;
	static SkScalar yOffset = 50.f;
	path->moveTo(-32.5f + xOffset, 0.0f + yOffset);
	path->lineTo(32.5f + xOffset, 0.0f + yOffset);

	path->moveTo(-32.5f + xOffset, 19 + yOffset);
	path->lineTo(32.5f + xOffset, 19 + yOffset);

	path->moveTo(-32.5f + xOffset, -19 + yOffset);
	path->lineTo(32.5f + xOffset, -19 + yOffset);
	path->lineTo(-32.5f + xOffset, -19 + yOffset);

	path->close();

	return SkIntToScalar(70);
	}

	static SkScalar make_arrow(SkPath* path) {
	static SkScalar xOffset = 34.f;
	static SkScalar yOffset = 40.f;
	path->moveTo(-26.f + xOffset, 0.0f + yOffset);
	path->lineTo(26.f + xOffset, 0.0f + yOffset);

	path->moveTo(-28.f + xOffset, -2.4748745f + yOffset);
	path->lineTo(0 + xOffset, 25.525126f + yOffset);

	path->moveTo(-28.f + xOffset, 2.4748745f + yOffset);
	path->lineTo(0 + xOffset, -25.525126f + yOffset);
	path->lineTo(-28.f + xOffset, 2.4748745f + yOffset);

	path->close();

	return SkIntToScalar(70);
	}

	static SkScalar make_curve(SkPath* path) {
	static SkScalar xOffset = -382.f;
	static SkScalar yOffset = -50.f;
	path->moveTo(491 + xOffset, 56 + yOffset);
	path->conicTo(435.93292f + xOffset, 56.000031f + yOffset,
	382.61078f + xOffset, 69.752716f + yOffset,
	0.9920463f);

	return SkIntToScalar(40);
	}

	static SkScalar make_battery(SkPath* path) {
	static SkScalar xOffset = 5.0f;

	path->moveTo(24.67f + xOffset, 0.33000004f);
	path->lineTo(8.3299999f + xOffset, 0.33000004f);
	path->lineTo(8.3299999f + xOffset, 5.3299999f);
	path->lineTo(0.33000004f + xOffset, 5.3299999f);
	path->lineTo(0.33000004f + xOffset, 50.669998f);
	path->lineTo(32.669998f + xOffset, 50.669998f);
	path->lineTo(32.669998f + xOffset, 5.3299999f);
	path->lineTo(24.67f + xOffset, 5.3299999f);
	path->lineTo(24.67f + xOffset, 0.33000004f);
	path->close();

	path->moveTo(25.727224f + xOffset, 12.886665f);
	path->lineTo(10.907918f + xOffset, 12.886665f);
	path->lineTo(7.5166659f + xOffset, 28.683645f);
	path->lineTo(14.810181f + xOffset, 28.683645f);
	path->lineTo(7.7024879f + xOffset, 46.135998f);
	path->lineTo(28.049999f + xOffset, 25.136419f);
	path->lineTo(16.854223f + xOffset, 25.136419f);
	path->lineTo(25.727224f + xOffset, 12.886665f);
	path->close();
	return SkIntToScalar(50);
	}

	static SkScalar make_battery2(SkPath* path) {
	static SkScalar xOffset = 225.625f;

	path->moveTo(32.669998f + xOffset, 9.8640003f);
	path->lineTo(0.33000004f + xOffset, 9.8640003f);
	path->lineTo(0.33000004f + xOffset, 50.669998f);
	path->lineTo(32.669998f + xOffset, 50.669998f);
	path->lineTo(32.669998f + xOffset, 9.8640003f);
	path->close();

	path->moveTo(10.907918f + xOffset, 12.886665f);
	path->lineTo(25.727224f + xOffset, 12.886665f);
	path->lineTo(16.854223f + xOffset, 25.136419f);
	path->lineTo(28.049999f + xOffset, 25.136419f);
	path->lineTo(7.7024879f + xOffset, 46.135998f);
	path->lineTo(14.810181f + xOffset, 28.683645f);
	path->lineTo(7.5166659f + xOffset, 28.683645f);
	path->lineTo(10.907918f + xOffset, 12.886665f);
	path->close();

	return SkIntToScalar(70);
	}

	constexpr MakePathProc gProcs[] = {
	make_triangle,
	make_rect,
	make_oval,
	make_star_5,
	make_star_13,
	make_three_line,
	make_arrow,
	make_curve,
	make_battery,
	make_battery2
	};

	constexpr SkScalar gWidths[] = {
	2.0f,
	3.0f,
	4.0f,
	5.0f,
	6.0f,
	7.0f,
	7.0f,
	14.0f,
	0.0f,
	0.0f,
	};

	constexpr SkScalar gMiters[] = {
	2.0f,
	3.0f,
	3.0f,
	3.0f,
	4.0f,
	4.0f,
	4.0f,
	4.0f,
	4.0f,
	4.0f,
	};

	constexpr SkScalar gXTranslate[] = {
	0.0f,
	0.0f,
	0.0f,
	0.0f,
	0.0f,
	0.0f,
	0.0f,
	0.0f,
	-220.625f,
	0.0f,
	};

	#define N SK_ARRAY_COUNT(gProcs)

	// This GM tests out drawing small paths (i.e., for Ganesh, using the Distance
	// Field path renderer) which are filled, stroked and filledAndStroked. In
	// particular this ensures that any cache keys in use include the stroking
	// parameters.
	class SmallPathsGM : public skiagm::GM {
	SkPath fPath[N];
	SkScalar fDY[N];
	protected:
	void onOnceBeforeDraw() override {
	for (size_t i = 0; i < N; i++) {
	fDY[i] = gProcs[i](&fPath[i]);
	}
	}

	SkString onShortName() override {
	return SkString("smallpaths");
	}

	SkISize onISize() override {
	return SkISize::Make(640, 480);
	}

	void onDraw(SkCanvas* canvas) override {
	SkPaint paint;
	paint.setAntiAlias(true);

	// first column: filled paths
	canvas->save();
	for (size_t i = 0; i < N; i++) {
	canvas->drawPath(fPath[i], paint);
	canvas->translate(gXTranslate[i], fDY[i]);
	}
	canvas->restore();
	canvas->translate(SkIntToScalar(120), SkIntToScalar(0));

	// second column: stroked paths
	canvas->save();
	paint.setStyle(SkPaint::kStroke_Style);
	paint.setStrokeCap(SkPaint::kButt_Cap);
	for (size_t i = 0; i < N; i++) {
	paint.setStrokeWidth(gWidths[i]);
	paint.setStrokeMiter(gMiters[i]);
	canvas->drawPath(fPath[i], paint);
	canvas->translate(gXTranslate[i], fDY[i]);
	}
	canvas->restore();
	canvas->translate(SkIntToScalar(120), SkIntToScalar(0));

	// third column: stroked paths with different widths
	canvas->save();
	paint.setStyle(SkPaint::kStroke_Style);
	paint.setStrokeCap(SkPaint::kButt_Cap);
	for (size_t i = 0; i < N; i++) {
	paint.setStrokeWidth(gWidths[i] + 2.0f);
	paint.setStrokeMiter(gMiters[i]);
	canvas->drawPath(fPath[i], paint);
	canvas->translate(gXTranslate[i], fDY[i]);
	}
	canvas->restore();
	canvas->translate(SkIntToScalar(120), SkIntToScalar(0));

	// fourth column: stroked and filled paths
	paint.setStyle(SkPaint::kStrokeAndFill_Style);
	paint.setStrokeCap(SkPaint::kButt_Cap);
	for (size_t i = 0; i < N; i++) {
	paint.setStrokeWidth(gWidths[i]);
	paint.setStrokeMiter(gMiters[i]);
	canvas->drawPath(fPath[i], paint);
	canvas->translate(gXTranslate[i], fDY[i]);
	}

	}

	private:
	typedef skiagm::GM INHERITED;
	};

	DEF_GM(return new SmallPathsGM;)