| /* |
| * Copyright 2017 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkTypes.h" |
| |
| #if SK_SUPPORT_GPU |
| |
| #include "GrContextPriv.h" |
| #include "GrMemoryPool.h" |
| #include "GrPathUtils.h" |
| #include "GrRenderTargetContext.h" |
| #include "GrRenderTargetContextPriv.h" |
| #include "GrResourceProvider.h" |
| #include "Sample.h" |
| #include "SkCanvas.h" |
| #include "SkPaint.h" |
| #include "SkPath.h" |
| #include "SkRectPriv.h" |
| #include "ccpr/GrCCCoverageProcessor.h" |
| #include "ccpr/GrCCFillGeometry.h" |
| #include "ccpr/GrCCStroker.h" |
| #include "gl/GrGLGpu.cpp" |
| #include "glsl/GrGLSLFragmentProcessor.h" |
| #include "ops/GrDrawOp.h" |
| |
| using TriPointInstance = GrCCCoverageProcessor::TriPointInstance; |
| using QuadPointInstance = GrCCCoverageProcessor::QuadPointInstance; |
| using PrimitiveType = GrCCCoverageProcessor::PrimitiveType; |
| |
| static constexpr float kDebugBloat = 40; |
| |
| /** |
| * This sample visualizes the AA bloat geometry generated by the ccpr geometry shaders. It |
| * increases the AA bloat by 50x and outputs color instead of coverage (coverage=+1 -> green, |
| * coverage=0 -> black, coverage=-1 -> red). Use the keys 1-7 to cycle through the different |
| * geometry processors. |
| */ |
| class CCPRGeometryView : public Sample { |
| public: |
| CCPRGeometryView() { this->updateGpuData(); } |
| void onDrawContent(SkCanvas*) override; |
| |
| Sample::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) override; |
| bool onClick(Sample::Click*) override; |
| bool onQuery(Sample::Event* evt) override; |
| |
| private: |
| class Click; |
| class DrawCoverageCountOp; |
| class VisualizeCoverageCountFP; |
| |
| void updateAndInval() { this->updateGpuData(); } |
| |
| void updateGpuData(); |
| |
| PrimitiveType fPrimitiveType = PrimitiveType::kTriangles; |
| SkCubicType fCubicType; |
| SkMatrix fCubicKLM; |
| |
| SkPoint fPoints[4] = { |
| {100.05f, 100.05f}, {400.75f, 100.05f}, {400.75f, 300.95f}, {100.05f, 300.95f}}; |
| |
| float fConicWeight = .5; |
| float fStrokeWidth = 40; |
| bool fDoStroke = false; |
| |
| SkTArray<TriPointInstance> fTriPointInstances; |
| SkTArray<QuadPointInstance> fQuadPointInstances; |
| SkPath fPath; |
| |
| typedef Sample INHERITED; |
| }; |
| |
| class CCPRGeometryView::DrawCoverageCountOp : public GrDrawOp { |
| DEFINE_OP_CLASS_ID |
| |
| public: |
| DrawCoverageCountOp(CCPRGeometryView* view) : INHERITED(ClassID()), fView(view) { |
| this->setBounds(SkRect::MakeIWH(fView->width(), fView->height()), GrOp::HasAABloat::kNo, |
| GrOp::IsZeroArea::kNo); |
| } |
| |
| const char* name() const override { |
| return "[Testing/Sample code] CCPRGeometryView::DrawCoverageCountOp"; |
| } |
| |
| private: |
| FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; } |
| RequiresDstTexture finalize(const GrCaps&, const GrAppliedClip*) override { |
| return RequiresDstTexture::kNo; |
| } |
| void onPrepare(GrOpFlushState*) override {} |
| void onExecute(GrOpFlushState*, const SkRect& chainBounds) override; |
| |
| CCPRGeometryView* fView; |
| |
| typedef GrDrawOp INHERITED; |
| }; |
| |
| class CCPRGeometryView::VisualizeCoverageCountFP : public GrFragmentProcessor { |
| public: |
| VisualizeCoverageCountFP() : GrFragmentProcessor(kTestFP_ClassID, kNone_OptimizationFlags) {} |
| |
| private: |
| const char* name() const override { |
| return "[Testing/Sample code] CCPRGeometryView::VisualizeCoverageCountFP"; |
| } |
| std::unique_ptr<GrFragmentProcessor> clone() const override { |
| return skstd::make_unique<VisualizeCoverageCountFP>(); |
| } |
| void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override {} |
| bool onIsEqual(const GrFragmentProcessor&) const override { return true; } |
| |
| class Impl : public GrGLSLFragmentProcessor { |
| void emitCode(EmitArgs& args) override { |
| GrGLSLFPFragmentBuilder* f = args.fFragBuilder; |
| f->codeAppendf("half count = %s.a;", args.fInputColor); |
| f->codeAppendf("%s = half4(clamp(-count, 0, 1), clamp(+count, 0, 1), 0, abs(count));", |
| args.fOutputColor); |
| } |
| }; |
| |
| GrGLSLFragmentProcessor* onCreateGLSLInstance() const override { return new Impl; } |
| }; |
| |
| static void draw_klm_line(int w, int h, SkCanvas* canvas, const SkScalar line[3], SkColor color) { |
| SkPoint p1, p2; |
| if (SkScalarAbs(line[1]) > SkScalarAbs(line[0])) { |
| // Draw from vertical edge to vertical edge. |
| p1 = {0, -line[2] / line[1]}; |
| p2 = {(SkScalar)w, (-line[2] - w * line[0]) / line[1]}; |
| } else { |
| // Draw from horizontal edge to horizontal edge. |
| p1 = {-line[2] / line[0], 0}; |
| p2 = {(-line[2] - h * line[1]) / line[0], (SkScalar)h}; |
| } |
| |
| SkPaint linePaint; |
| linePaint.setColor(color); |
| linePaint.setAlpha(128); |
| linePaint.setStyle(SkPaint::kStroke_Style); |
| linePaint.setStrokeWidth(0); |
| linePaint.setAntiAlias(true); |
| canvas->drawLine(p1, p2, linePaint); |
| } |
| |
| void CCPRGeometryView::onDrawContent(SkCanvas* canvas) { |
| canvas->clear(SK_ColorBLACK); |
| |
| if (!fDoStroke) { |
| SkPaint outlinePaint; |
| outlinePaint.setColor(0x80ffffff); |
| outlinePaint.setStyle(SkPaint::kStroke_Style); |
| outlinePaint.setStrokeWidth(0); |
| outlinePaint.setAntiAlias(true); |
| canvas->drawPath(fPath, outlinePaint); |
| } |
| |
| #if 0 |
| SkPaint gridPaint; |
| gridPaint.setColor(0x10000000); |
| gridPaint.setStyle(SkPaint::kStroke_Style); |
| gridPaint.setStrokeWidth(0); |
| gridPaint.setAntiAlias(true); |
| for (int y = 0; y < this->height(); y += kDebugBloat) { |
| canvas->drawLine(0, y, this->width(), y, gridPaint); |
| } |
| for (int x = 0; x < this->width(); x += kDebugBloat) { |
| canvas->drawLine(x, 0, x, this->height(), outlinePaint); |
| } |
| #endif |
| |
| SkString caption; |
| if (GrRenderTargetContext* rtc = canvas->internal_private_accessTopLayerRenderTargetContext()) { |
| // Render coverage count. |
| GrContext* ctx = canvas->getGrContext(); |
| SkASSERT(ctx); |
| |
| GrOpMemoryPool* pool = ctx->contextPriv().opMemoryPool(); |
| |
| const GrBackendFormat format = |
| ctx->contextPriv().caps()->getBackendFormatFromGrColorType(GrColorType::kAlpha_F16, |
| GrSRGBEncoded::kNo); |
| sk_sp<GrRenderTargetContext> ccbuff = |
| ctx->contextPriv().makeDeferredRenderTargetContext(format, SkBackingFit::kApprox, |
| this->width(), this->height(), |
| kAlpha_half_GrPixelConfig, |
| nullptr); |
| SkASSERT(ccbuff); |
| ccbuff->clear(nullptr, SK_PMColor4fTRANSPARENT, |
| GrRenderTargetContext::CanClearFullscreen::kYes); |
| ccbuff->priv().testingOnly_addDrawOp(pool->allocate<DrawCoverageCountOp>(this)); |
| |
| // Visualize coverage count in main canvas. |
| GrPaint paint; |
| paint.addColorFragmentProcessor( |
| GrSimpleTextureEffect::Make(sk_ref_sp(ccbuff->asTextureProxy()), SkMatrix::I())); |
| paint.addColorFragmentProcessor( |
| skstd::make_unique<VisualizeCoverageCountFP>()); |
| paint.setPorterDuffXPFactory(SkBlendMode::kSrcOver); |
| rtc->drawRect(GrNoClip(), std::move(paint), GrAA::kNo, SkMatrix::I(), |
| SkRect::MakeIWH(this->width(), this->height())); |
| |
| // Add label. |
| caption.appendf("PrimitiveType_%s", |
| GrCCCoverageProcessor::PrimitiveTypeName(fPrimitiveType)); |
| if (PrimitiveType::kCubics == fPrimitiveType) { |
| caption.appendf(" (%s)", SkCubicTypeName(fCubicType)); |
| } else if (PrimitiveType::kConics == fPrimitiveType) { |
| caption.appendf(" (w=%f)", fConicWeight); |
| } |
| if (fDoStroke) { |
| caption.appendf(" (stroke_width=%f)", fStrokeWidth); |
| } |
| } else { |
| caption = "Use GPU backend to visualize geometry."; |
| } |
| |
| SkPaint pointsPaint; |
| pointsPaint.setColor(SK_ColorBLUE); |
| pointsPaint.setStrokeWidth(8); |
| pointsPaint.setAntiAlias(true); |
| |
| if (PrimitiveType::kCubics == fPrimitiveType) { |
| canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, fPoints, pointsPaint); |
| if (!fDoStroke) { |
| int w = this->width(), h = this->height(); |
| draw_klm_line(w, h, canvas, &fCubicKLM[0], SK_ColorYELLOW); |
| draw_klm_line(w, h, canvas, &fCubicKLM[3], SK_ColorBLUE); |
| draw_klm_line(w, h, canvas, &fCubicKLM[6], SK_ColorRED); |
| } |
| } else { |
| canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, fPoints, pointsPaint); |
| canvas->drawPoints(SkCanvas::kPoints_PointMode, 1, fPoints + 3, pointsPaint); |
| } |
| |
| SkPaint captionPaint; |
| captionPaint.setTextSize(20); |
| captionPaint.setColor(SK_ColorWHITE); |
| captionPaint.setAntiAlias(true); |
| canvas->drawText(caption.c_str(), caption.size(), 10, 30, captionPaint); |
| } |
| |
| void CCPRGeometryView::updateGpuData() { |
| using Verb = GrCCFillGeometry::Verb; |
| fTriPointInstances.reset(); |
| fQuadPointInstances.reset(); |
| |
| fPath.reset(); |
| fPath.moveTo(fPoints[0]); |
| |
| if (PrimitiveType::kCubics == fPrimitiveType) { |
| double t[2], s[2]; |
| fCubicType = GrPathUtils::getCubicKLM(fPoints, &fCubicKLM, t, s); |
| GrCCFillGeometry geometry; |
| geometry.beginContour(fPoints[0]); |
| geometry.cubicTo(fPoints, kDebugBloat / 2, kDebugBloat / 2); |
| geometry.endContour(); |
| int ptsIdx = 0; |
| for (Verb verb : geometry.verbs()) { |
| switch (verb) { |
| case Verb::kLineTo: |
| ++ptsIdx; |
| continue; |
| case Verb::kMonotonicQuadraticTo: |
| ptsIdx += 2; |
| continue; |
| case Verb::kMonotonicCubicTo: |
| fQuadPointInstances.push_back().set(&geometry.points()[ptsIdx], 0, 0); |
| ptsIdx += 3; |
| continue; |
| default: |
| continue; |
| } |
| } |
| fPath.cubicTo(fPoints[1], fPoints[2], fPoints[3]); |
| } else if (PrimitiveType::kTriangles != fPrimitiveType) { |
| SkPoint P3[3] = {fPoints[0], fPoints[1], fPoints[3]}; |
| GrCCFillGeometry geometry; |
| geometry.beginContour(P3[0]); |
| if (PrimitiveType::kQuadratics == fPrimitiveType) { |
| geometry.quadraticTo(P3); |
| fPath.quadTo(fPoints[1], fPoints[3]); |
| } else { |
| SkASSERT(PrimitiveType::kConics == fPrimitiveType); |
| geometry.conicTo(P3, fConicWeight); |
| fPath.conicTo(fPoints[1], fPoints[3], fConicWeight); |
| } |
| geometry.endContour(); |
| int ptsIdx = 0, conicWeightIdx = 0; |
| for (Verb verb : geometry.verbs()) { |
| if (Verb::kBeginContour == verb || |
| Verb::kEndOpenContour == verb || |
| Verb::kEndClosedContour == verb) { |
| continue; |
| } |
| if (Verb::kLineTo == verb) { |
| ++ptsIdx; |
| continue; |
| } |
| SkASSERT(Verb::kMonotonicQuadraticTo == verb || Verb::kMonotonicConicTo == verb); |
| if (PrimitiveType::kQuadratics == fPrimitiveType && |
| Verb::kMonotonicQuadraticTo == verb) { |
| fTriPointInstances.push_back().set(&geometry.points()[ptsIdx], Sk2f(0, 0)); |
| } else if (PrimitiveType::kConics == fPrimitiveType && |
| Verb::kMonotonicConicTo == verb) { |
| fQuadPointInstances.push_back().setW(&geometry.points()[ptsIdx], Sk2f(0, 0), |
| geometry.getConicWeight(conicWeightIdx++)); |
| } |
| ptsIdx += 2; |
| } |
| } else { |
| fTriPointInstances.push_back().set(fPoints[0], fPoints[1], fPoints[3], Sk2f(0, 0)); |
| fPath.lineTo(fPoints[1]); |
| fPath.lineTo(fPoints[3]); |
| fPath.close(); |
| } |
| } |
| |
| void CCPRGeometryView::DrawCoverageCountOp::onExecute(GrOpFlushState* state, |
| const SkRect& chainBounds) { |
| GrResourceProvider* rp = state->resourceProvider(); |
| GrContext* context = state->gpu()->getContext(); |
| GrGLGpu* glGpu = GrBackendApi::kOpenGL == context->contextPriv().getBackend() |
| ? static_cast<GrGLGpu*>(state->gpu()) |
| : nullptr; |
| if (glGpu) { |
| glGpu->handleDirtyContext(); |
| // GR_GL_CALL(glGpu->glInterface(), PolygonMode(GR_GL_FRONT_AND_BACK, GR_GL_LINE)); |
| GR_GL_CALL(glGpu->glInterface(), Enable(GR_GL_LINE_SMOOTH)); |
| } |
| |
| GrPipeline pipeline(state->drawOpArgs().fProxy, GrScissorTest::kDisabled, SkBlendMode::kPlus); |
| |
| if (!fView->fDoStroke) { |
| GrCCCoverageProcessor proc(rp, fView->fPrimitiveType); |
| SkDEBUGCODE(proc.enableDebugBloat(kDebugBloat)); |
| |
| SkSTArray<1, GrMesh> mesh; |
| if (PrimitiveType::kCubics == fView->fPrimitiveType || |
| PrimitiveType::kConics == fView->fPrimitiveType) { |
| sk_sp<GrBuffer> instBuff(rp->createBuffer( |
| fView->fQuadPointInstances.count() * sizeof(QuadPointInstance), |
| kVertex_GrBufferType, kDynamic_GrAccessPattern, |
| GrResourceProvider::Flags::kNoPendingIO | |
| GrResourceProvider::Flags::kRequireGpuMemory, |
| fView->fQuadPointInstances.begin())); |
| if (!fView->fQuadPointInstances.empty() && instBuff) { |
| proc.appendMesh(instBuff.get(), fView->fQuadPointInstances.count(), 0, &mesh); |
| } |
| } else { |
| sk_sp<GrBuffer> instBuff(rp->createBuffer( |
| fView->fTriPointInstances.count() * sizeof(TriPointInstance), |
| kVertex_GrBufferType, kDynamic_GrAccessPattern, |
| GrResourceProvider::Flags::kNoPendingIO | |
| GrResourceProvider::Flags::kRequireGpuMemory, fView->fTriPointInstances.begin())); |
| if (!fView->fTriPointInstances.empty() && instBuff) { |
| proc.appendMesh(instBuff.get(), fView->fTriPointInstances.count(), 0, &mesh); |
| } |
| } |
| |
| if (!mesh.empty()) { |
| SkASSERT(1 == mesh.count()); |
| proc.draw(state, pipeline, nullptr, mesh.begin(), 1, this->bounds()); |
| } |
| } else if (PrimitiveType::kConics != fView->fPrimitiveType) { // No conic stroke support yet. |
| GrCCStroker stroker(0,0,0); |
| |
| SkPaint p; |
| p.setStyle(SkPaint::kStroke_Style); |
| p.setStrokeWidth(fView->fStrokeWidth); |
| p.setStrokeJoin(SkPaint::kMiter_Join); |
| p.setStrokeMiter(4); |
| // p.setStrokeCap(SkPaint::kRound_Cap); |
| stroker.parseDeviceSpaceStroke(fView->fPath, SkPathPriv::PointData(fView->fPath), |
| SkStrokeRec(p), p.getStrokeWidth(), GrScissorTest::kDisabled, |
| SkIRect::MakeWH(fView->width(), fView->height()), {0, 0}); |
| GrCCStroker::BatchID batchID = stroker.closeCurrentBatch(); |
| |
| GrOnFlushResourceProvider onFlushRP(context->contextPriv().drawingManager()); |
| stroker.prepareToDraw(&onFlushRP); |
| |
| SkIRect ibounds; |
| this->bounds().roundOut(&ibounds); |
| stroker.drawStrokes(state, batchID, ibounds); |
| } |
| |
| if (glGpu) { |
| context->resetContext(kMisc_GrGLBackendState); |
| } |
| } |
| |
| class CCPRGeometryView::Click : public Sample::Click { |
| public: |
| Click(Sample* target, int ptIdx) : Sample::Click(target), fPtIdx(ptIdx) {} |
| |
| void doClick(SkPoint points[]) { |
| if (fPtIdx >= 0) { |
| this->dragPoint(points, fPtIdx); |
| } else { |
| for (int i = 0; i < 4; ++i) { |
| this->dragPoint(points, i); |
| } |
| } |
| } |
| |
| private: |
| void dragPoint(SkPoint points[], int idx) { |
| SkIPoint delta = fICurr - fIPrev; |
| points[idx] += SkPoint::Make(delta.x(), delta.y()); |
| } |
| |
| int fPtIdx; |
| }; |
| |
| Sample::Click* CCPRGeometryView::onFindClickHandler(SkScalar x, SkScalar y, unsigned) { |
| for (int i = 0; i < 4; ++i) { |
| if (PrimitiveType::kCubics != fPrimitiveType && 2 == i) { |
| continue; |
| } |
| if (fabs(x - fPoints[i].x()) < 20 && fabsf(y - fPoints[i].y()) < 20) { |
| return new Click(this, i); |
| } |
| } |
| return new Click(this, -1); |
| } |
| |
| bool CCPRGeometryView::onClick(Sample::Click* click) { |
| Click* myClick = (Click*)click; |
| myClick->doClick(fPoints); |
| this->updateAndInval(); |
| return true; |
| } |
| |
| bool CCPRGeometryView::onQuery(Sample::Event* evt) { |
| if (Sample::TitleQ(*evt)) { |
| Sample::TitleR(evt, "CCPRGeometry"); |
| return true; |
| } |
| SkUnichar unichar; |
| if (Sample::CharQ(*evt, &unichar)) { |
| if (unichar >= '1' && unichar <= '4') { |
| fPrimitiveType = PrimitiveType(unichar - '1'); |
| if (fPrimitiveType >= PrimitiveType::kWeightedTriangles) { |
| fPrimitiveType = (PrimitiveType) ((int)fPrimitiveType + 1); |
| } |
| this->updateAndInval(); |
| return true; |
| } |
| float* valueToScale = nullptr; |
| if (fDoStroke) { |
| valueToScale = &fStrokeWidth; |
| } else if (PrimitiveType::kConics == fPrimitiveType) { |
| valueToScale = &fConicWeight; |
| } |
| if (valueToScale) { |
| if (unichar == '+') { |
| *valueToScale *= 2; |
| this->updateAndInval(); |
| return true; |
| } |
| if (unichar == '+' || unichar == '=') { |
| *valueToScale *= 5/4.f; |
| this->updateAndInval(); |
| return true; |
| } |
| if (unichar == '-') { |
| *valueToScale *= 4/5.f; |
| this->updateAndInval(); |
| return true; |
| } |
| if (unichar == '_') { |
| *valueToScale *= .5f; |
| this->updateAndInval(); |
| return true; |
| } |
| } |
| if (unichar == 'D') { |
| SkDebugf(" SkPoint fPoints[4] = {\n"); |
| SkDebugf(" {%ff, %ff},\n", fPoints[0].x(), fPoints[0].y()); |
| SkDebugf(" {%ff, %ff},\n", fPoints[1].x(), fPoints[1].y()); |
| SkDebugf(" {%ff, %ff},\n", fPoints[2].x(), fPoints[2].y()); |
| SkDebugf(" {%ff, %ff}\n", fPoints[3].x(), fPoints[3].y()); |
| SkDebugf(" };\n"); |
| return true; |
| } |
| if (unichar == 'S') { |
| fDoStroke = !fDoStroke; |
| this->updateAndInval(); |
| } |
| } |
| return this->INHERITED::onQuery(evt); |
| } |
| |
| DEF_SAMPLE(return new CCPRGeometryView;) |
| |
| #endif // SK_SUPPORT_GPU |