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

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 // This test only works with the GPU backend.

 #include "gm.h"

 #if SK_SUPPORT_GPU

 #include "GrContext.h"
 #include "GrDefaultGeoProcFactory.h"
 #include "GrDrawContextPriv.h"
 #include "GrPathUtils.h"
 #include "GrTest.h"
 #include "SkColorPriv.h"
 #include "SkGeometry.h"
 #include "SkTLList.h"

 #include "batches/GrTestBatch.h"
 #include "batches/GrVertexBatch.h"

 #include "effects/GrConvexPolyEffect.h"

 /** outset rendered rect to visualize anti-aliased poly edges */
 static SkRect outset(const SkRect& unsorted) {
     SkRect r = unsorted;
     r.outset(5.f, 5.f);
     return r;
 }

 /** sorts a rect */
 static SkRect sorted_rect(const SkRect& unsorted) {
     SkRect r = unsorted;
     r.sort();
     return r;
 }

 namespace skiagm {
 class PolyBoundsBatch : public GrTestBatch {
 public:
     DEFINE_BATCH_CLASS_ID

     const char* name() const override { return "PolyBoundsBatch"; }

     PolyBoundsBatch(const SkRect& rect, GrColor color)
         : INHERITED(ClassID(), outset(sorted_rect(rect)), color)
         , fRect(outset(rect)) {
     }

 private:
     void onPrepareDraws(Target* target) const override {
         using namespace GrDefaultGeoProcFactory;

         Color color(this->color());
         Coverage coverage(Coverage::kSolid_Type);
         LocalCoords localCoords(LocalCoords::kUnused_Type);
         SkAutoTUnref<const GrGeometryProcessor> gp(
             GrDefaultGeoProcFactory::Create(color, coverage, localCoords, SkMatrix::I()));

         size_t vertexStride = gp->getVertexStride();
         SkASSERT(vertexStride == sizeof(SkPoint));
         QuadHelper helper;
         SkPoint* verts = reinterpret_cast<SkPoint*>(helper.init(target, vertexStride, 1));
         if (!verts) {
             return;
         }

         fRect.toQuad(verts);

         helper.recordDraw(target, gp);
     }

     SkRect fRect;

     typedef GrTestBatch INHERITED;
 };

 /**
  * This GM directly exercises a GrProcessor that draws convex polygons.
  */
 class ConvexPolyEffect : public GM {
 public:
     ConvexPolyEffect() {
         this->setBGColor(0xFFFFFFFF);
     }

 protected:
     SkString onShortName() override {
         return SkString("convex_poly_effect");
     }

     SkISize onISize() override {
         return SkISize::Make(720, 800);
     }

     void onOnceBeforeDraw() override {
         SkPath tri;
         tri.moveTo(5.f, 5.f);
         tri.lineTo(100.f, 20.f);
         tri.lineTo(15.f, 100.f);

         fPaths.addToTail(tri);
         fPaths.addToTail(SkPath())->reverseAddPath(tri);

         tri.close();
         fPaths.addToTail(tri);

         SkPath ngon;
         static const SkScalar kRadius = 50.f;
         const SkPoint center = { kRadius, kRadius };
         for (int i = 0; i < GrConvexPolyEffect::kMaxEdges; ++i) {
             SkScalar angle = 2 * SK_ScalarPI * i / GrConvexPolyEffect::kMaxEdges;
             SkPoint point;
             point.fY = SkScalarSinCos(angle, &point.fX);
             point.scale(kRadius);
             point = center + point;
             if (0 == i) {
                 ngon.moveTo(point);
             } else {
                 ngon.lineTo(point);
             }
         }

         fPaths.addToTail(ngon);
         SkMatrix scaleM;
         scaleM.setScale(1.1f, 0.4f);
         ngon.transform(scaleM);
         fPaths.addToTail(ngon);

         SkPath linePath;
         linePath.moveTo(5.f, 5.f);
         linePath.lineTo(6.f, 6.f);
         fPaths.addToTail(linePath);

         // integer edges
         fRects.addToTail(SkRect::MakeLTRB(5.f, 1.f, 30.f, 25.f));
         // half-integer edges
         fRects.addToTail(SkRect::MakeLTRB(5.5f, 0.5f, 29.5f, 24.5f));
         // vertically/horizontally thin rects that cover pixel centers
         fRects.addToTail(SkRect::MakeLTRB(5.25f, 0.5f, 5.75f, 24.5f));
         fRects.addToTail(SkRect::MakeLTRB(5.5f,  0.5f, 29.5f, 0.75f));
         // vertically/horizontally thin rects that don't cover pixel centers
         fRects.addToTail(SkRect::MakeLTRB(5.55f, 0.5f, 5.75f, 24.5f));
         fRects.addToTail(SkRect::MakeLTRB(5.5f, .05f, 29.5f, .25f));
         // small in x and y
         fRects.addToTail(SkRect::MakeLTRB(5.05f, .55f, 5.45f, .85f));
         // inverted in x and y
         fRects.addToTail(SkRect::MakeLTRB(100.f, 50.5f, 5.f, 0.5f));
     }

     void onDraw(SkCanvas* canvas) override {
         GrDrawContext* drawContext = canvas->internal_private_accessTopLayerDrawContext();
         if (!drawContext) {
             skiagm::GM::DrawGpuOnlyMessage(canvas);
             return;
         }

         SkScalar y = 0;
         static const SkScalar kDX = 12.f;
         for (PathList::Iter iter(fPaths, PathList::Iter::kHead_IterStart);
              iter.get();
              iter.next()) {
             const SkPath* path = iter.get();
             SkScalar x = 0;

             for (int et = 0; et < kGrProcessorEdgeTypeCnt; ++et) {
                 const SkMatrix m = SkMatrix::MakeTrans(x, y);
                 SkPath p;
                 path->transform(m, &p);

                 GrPrimitiveEdgeType edgeType = (GrPrimitiveEdgeType) et;
                 SkAutoTUnref<GrFragmentProcessor> fp(GrConvexPolyEffect::Create(edgeType, p));
                 if (!fp) {
                     continue;
                 }

                 GrPipelineBuilder pipelineBuilder;
                 pipelineBuilder.setXPFactory(
                     GrPorterDuffXPFactory::Create(SkXfermode::kSrc_Mode))->unref();
                 pipelineBuilder.addCoverageFragmentProcessor(fp);
                 pipelineBuilder.setRenderTarget(drawContext->accessRenderTarget());

                 SkAutoTUnref<GrDrawBatch> batch(new PolyBoundsBatch(p.getBounds(), 0xff000000));

                 drawContext->drawContextPriv().testingOnly_drawBatch(pipelineBuilder, batch);

                 x += SkScalarCeilToScalar(path->getBounds().width() + kDX);
             }

             // Draw AA and non AA paths using normal API for reference.
             canvas->save();
             canvas->translate(x, y);
             SkPaint paint;
             canvas->drawPath(*path, paint);
             canvas->translate(path->getBounds().width() + 10.f, 0);
             paint.setAntiAlias(true);
             canvas->drawPath(*path, paint);
             canvas->restore();

             y += SkScalarCeilToScalar(path->getBounds().height() + 20.f);
         }

         for (RectList::Iter iter(fRects, RectList::Iter::kHead_IterStart);
              iter.get();
              iter.next()) {

             SkScalar x = 0;

             for (int et = 0; et < kGrProcessorEdgeTypeCnt; ++et) {
                 SkRect rect = *iter.get();
                 rect.offset(x, y);
                 GrPrimitiveEdgeType edgeType = (GrPrimitiveEdgeType) et;
                 SkAutoTUnref<GrFragmentProcessor> fp(GrConvexPolyEffect::Create(edgeType, rect));
                 if (!fp) {
                     continue;
                 }

                 GrPipelineBuilder pipelineBuilder;
                 pipelineBuilder.setXPFactory(
                     GrPorterDuffXPFactory::Create(SkXfermode::kSrc_Mode))->unref();
                 pipelineBuilder.addCoverageFragmentProcessor(fp);
                 pipelineBuilder.setRenderTarget(drawContext->accessRenderTarget());

                 SkAutoTUnref<GrDrawBatch> batch(new PolyBoundsBatch(rect, 0xff000000));

                 drawContext->drawContextPriv().testingOnly_drawBatch(pipelineBuilder, batch);

                 x += SkScalarCeilToScalar(rect.width() + kDX);
             }

             // Draw rect without and with AA using normal API for reference
             canvas->save();
             canvas->translate(x, y);
             SkPaint paint;
             canvas->drawRect(*iter.get(), paint);
             x += SkScalarCeilToScalar(iter.get()->width() + kDX);
             paint.setAntiAlias(true);
             canvas->drawRect(*iter.get(), paint);
             canvas->restore();

             y += SkScalarCeilToScalar(iter.get()->height() + 20.f);
         }
     }

 private:
     typedef SkTLList<SkPath, 1> PathList;
     typedef SkTLList<SkRect, 1> RectList;
     PathList fPaths;
     RectList fRects;

     typedef GM INHERITED;
 };

 DEF_GM(return new ConvexPolyEffect;)
 }

 #endif
	/*
	* Copyright 2014 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	// This test only works with the GPU backend.

	#include "gm.h"

	#if SK_SUPPORT_GPU

	#include "GrContext.h"
	#include "GrDefaultGeoProcFactory.h"
	#include "GrDrawContextPriv.h"
	#include "GrPathUtils.h"
	#include "GrTest.h"
	#include "SkColorPriv.h"
	#include "SkGeometry.h"
	#include "SkTLList.h"

	#include "batches/GrTestBatch.h"
	#include "batches/GrVertexBatch.h"

	#include "effects/GrConvexPolyEffect.h"

	/** outset rendered rect to visualize anti-aliased poly edges */
	static SkRect outset(const SkRect& unsorted) {
	SkRect r = unsorted;
	r.outset(5.f, 5.f);
	return r;
	}

	/** sorts a rect */
	static SkRect sorted_rect(const SkRect& unsorted) {
	SkRect r = unsorted;
	r.sort();
	return r;
	}

	namespace skiagm {
	class PolyBoundsBatch : public GrTestBatch {
	public:
	DEFINE_BATCH_CLASS_ID

	const char* name() const override { return "PolyBoundsBatch"; }

	PolyBoundsBatch(const SkRect& rect, GrColor color)
	: INHERITED(ClassID(), outset(sorted_rect(rect)), color)
	, fRect(outset(rect)) {
	}

	private:
	void onPrepareDraws(Target* target) const override {
	using namespace GrDefaultGeoProcFactory;

	Color color(this->color());
	Coverage coverage(Coverage::kSolid_Type);
	LocalCoords localCoords(LocalCoords::kUnused_Type);
	SkAutoTUnref<const GrGeometryProcessor> gp(
	GrDefaultGeoProcFactory::Create(color, coverage, localCoords, SkMatrix::I()));

	size_t vertexStride = gp->getVertexStride();
	SkASSERT(vertexStride == sizeof(SkPoint));
	QuadHelper helper;
	SkPoint* verts = reinterpret_cast<SkPoint*>(helper.init(target, vertexStride, 1));
	if (!verts) {
	return;
	}

	fRect.toQuad(verts);

	helper.recordDraw(target, gp);
	}

	SkRect fRect;

	typedef GrTestBatch INHERITED;
	};

	/**
	* This GM directly exercises a GrProcessor that draws convex polygons.
	*/
	class ConvexPolyEffect : public GM {
	public:
	ConvexPolyEffect() {
	this->setBGColor(0xFFFFFFFF);
	}

	protected:
	SkString onShortName() override {
	return SkString("convex_poly_effect");
	}

	SkISize onISize() override {
	return SkISize::Make(720, 800);
	}

	void onOnceBeforeDraw() override {
	SkPath tri;
	tri.moveTo(5.f, 5.f);
	tri.lineTo(100.f, 20.f);
	tri.lineTo(15.f, 100.f);

	fPaths.addToTail(tri);
	fPaths.addToTail(SkPath())->reverseAddPath(tri);

	tri.close();
	fPaths.addToTail(tri);

	SkPath ngon;
	static const SkScalar kRadius = 50.f;
	const SkPoint center = { kRadius, kRadius };
	for (int i = 0; i < GrConvexPolyEffect::kMaxEdges; ++i) {
	SkScalar angle = 2 * SK_ScalarPI * i / GrConvexPolyEffect::kMaxEdges;
	SkPoint point;
	point.fY = SkScalarSinCos(angle, &point.fX);
	point.scale(kRadius);
	point = center + point;
	if (0 == i) {
	ngon.moveTo(point);
	} else {
	ngon.lineTo(point);
	}
	}

	fPaths.addToTail(ngon);
	SkMatrix scaleM;
	scaleM.setScale(1.1f, 0.4f);
	ngon.transform(scaleM);
	fPaths.addToTail(ngon);

	SkPath linePath;
	linePath.moveTo(5.f, 5.f);
	linePath.lineTo(6.f, 6.f);
	fPaths.addToTail(linePath);

	// integer edges
	fRects.addToTail(SkRect::MakeLTRB(5.f, 1.f, 30.f, 25.f));
	// half-integer edges
	fRects.addToTail(SkRect::MakeLTRB(5.5f, 0.5f, 29.5f, 24.5f));
	// vertically/horizontally thin rects that cover pixel centers
	fRects.addToTail(SkRect::MakeLTRB(5.25f, 0.5f, 5.75f, 24.5f));
	fRects.addToTail(SkRect::MakeLTRB(5.5f, 0.5f, 29.5f, 0.75f));
	// vertically/horizontally thin rects that don't cover pixel centers
	fRects.addToTail(SkRect::MakeLTRB(5.55f, 0.5f, 5.75f, 24.5f));
	fRects.addToTail(SkRect::MakeLTRB(5.5f, .05f, 29.5f, .25f));
	// small in x and y
	fRects.addToTail(SkRect::MakeLTRB(5.05f, .55f, 5.45f, .85f));
	// inverted in x and y
	fRects.addToTail(SkRect::MakeLTRB(100.f, 50.5f, 5.f, 0.5f));
	}

	void onDraw(SkCanvas* canvas) override {
	GrDrawContext* drawContext = canvas->internal_private_accessTopLayerDrawContext();
	if (!drawContext) {
	skiagm::GM::DrawGpuOnlyMessage(canvas);
	return;
	}

	SkScalar y = 0;
	static const SkScalar kDX = 12.f;
	for (PathList::Iter iter(fPaths, PathList::Iter::kHead_IterStart);
	iter.get();
	iter.next()) {
	const SkPath* path = iter.get();
	SkScalar x = 0;

	for (int et = 0; et < kGrProcessorEdgeTypeCnt; ++et) {
	const SkMatrix m = SkMatrix::MakeTrans(x, y);
	SkPath p;
	path->transform(m, &p);

	GrPrimitiveEdgeType edgeType = (GrPrimitiveEdgeType) et;
	SkAutoTUnref<GrFragmentProcessor> fp(GrConvexPolyEffect::Create(edgeType, p));
	if (!fp) {
	continue;
	}

	GrPipelineBuilder pipelineBuilder;
	pipelineBuilder.setXPFactory(
	GrPorterDuffXPFactory::Create(SkXfermode::kSrc_Mode))->unref();
	pipelineBuilder.addCoverageFragmentProcessor(fp);
	pipelineBuilder.setRenderTarget(drawContext->accessRenderTarget());

	SkAutoTUnref<GrDrawBatch> batch(new PolyBoundsBatch(p.getBounds(), 0xff000000));

	drawContext->drawContextPriv().testingOnly_drawBatch(pipelineBuilder, batch);

	x += SkScalarCeilToScalar(path->getBounds().width() + kDX);
	}

	// Draw AA and non AA paths using normal API for reference.
	canvas->save();
	canvas->translate(x, y);
	SkPaint paint;
	canvas->drawPath(*path, paint);
	canvas->translate(path->getBounds().width() + 10.f, 0);
	paint.setAntiAlias(true);
	canvas->drawPath(*path, paint);
	canvas->restore();

	y += SkScalarCeilToScalar(path->getBounds().height() + 20.f);
	}

	for (RectList::Iter iter(fRects, RectList::Iter::kHead_IterStart);
	iter.get();
	iter.next()) {

	SkScalar x = 0;

	for (int et = 0; et < kGrProcessorEdgeTypeCnt; ++et) {
	SkRect rect = *iter.get();
	rect.offset(x, y);
	GrPrimitiveEdgeType edgeType = (GrPrimitiveEdgeType) et;
	SkAutoTUnref<GrFragmentProcessor> fp(GrConvexPolyEffect::Create(edgeType, rect));
	if (!fp) {
	continue;
	}

	GrPipelineBuilder pipelineBuilder;
	pipelineBuilder.setXPFactory(
	GrPorterDuffXPFactory::Create(SkXfermode::kSrc_Mode))->unref();
	pipelineBuilder.addCoverageFragmentProcessor(fp);
	pipelineBuilder.setRenderTarget(drawContext->accessRenderTarget());

	SkAutoTUnref<GrDrawBatch> batch(new PolyBoundsBatch(rect, 0xff000000));

	drawContext->drawContextPriv().testingOnly_drawBatch(pipelineBuilder, batch);

	x += SkScalarCeilToScalar(rect.width() + kDX);
	}

	// Draw rect without and with AA using normal API for reference
	canvas->save();
	canvas->translate(x, y);
	SkPaint paint;
	canvas->drawRect(*iter.get(), paint);
	x += SkScalarCeilToScalar(iter.get()->width() + kDX);
	paint.setAntiAlias(true);
	canvas->drawRect(*iter.get(), paint);
	canvas->restore();

	y += SkScalarCeilToScalar(iter.get()->height() + 20.f);
	}
	}

	private:
	typedef SkTLList<SkPath, 1> PathList;
	typedef SkTLList<SkRect, 1> RectList;
	PathList fPaths;
	RectList fRects;

	typedef GM INHERITED;
	};

	DEF_GM(return new ConvexPolyEffect;)
	}

	#endif