| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "GrStencilAndCoverPathRenderer.h" |
| #include "GrCaps.h" |
| #include "GrContext.h" |
| #include "GrDrawContextPriv.h" |
| #include "GrDrawPathBatch.h" |
| #include "GrGpu.h" |
| #include "GrPath.h" |
| #include "GrRenderTarget.h" |
| #include "GrResourceProvider.h" |
| #include "GrStencilPathBatch.h" |
| #include "GrStyle.h" |
| #include "batches/GrRectBatchFactory.h" |
| |
| GrPathRenderer* GrStencilAndCoverPathRenderer::Create(GrResourceProvider* resourceProvider, |
| const GrCaps& caps) { |
| if (caps.shaderCaps()->pathRenderingSupport()) { |
| return new GrStencilAndCoverPathRenderer(resourceProvider); |
| } else { |
| return nullptr; |
| } |
| } |
| |
| GrStencilAndCoverPathRenderer::GrStencilAndCoverPathRenderer(GrResourceProvider* resourceProvider) |
| : fResourceProvider(resourceProvider) { |
| } |
| |
| bool GrStencilAndCoverPathRenderer::onCanDrawPath(const CanDrawPathArgs& args) const { |
| // GrPath doesn't support hairline paths. An arbitrary path effect could produce a hairline |
| // path. |
| if (args.fShape->style().strokeRec().isHairlineStyle() || |
| args.fShape->style().hasNonDashPathEffect()) { |
| return false; |
| } |
| if (args.fHasUserStencilSettings) { |
| return false; |
| } |
| if (args.fAntiAlias) { |
| return args.fIsStencilBufferMSAA; |
| } else { |
| return true; // doesn't do per-path AA, relies on the target having MSAA |
| } |
| } |
| |
| static GrPath* get_gr_path(GrResourceProvider* resourceProvider, const SkPath& skPath, |
| const GrStyle& style) { |
| GrUniqueKey key; |
| bool isVolatile; |
| GrPath::ComputeKey(skPath, style, &key, &isVolatile); |
| SkAutoTUnref<GrPath> path( |
| static_cast<GrPath*>(resourceProvider->findAndRefResourceByUniqueKey(key))); |
| if (!path) { |
| path.reset(resourceProvider->createPath(skPath, style)); |
| if (!isVolatile) { |
| resourceProvider->assignUniqueKeyToResource(key, path); |
| } |
| } else { |
| SkASSERT(path->isEqualTo(skPath, style)); |
| } |
| return path.release(); |
| } |
| |
| void GrStencilAndCoverPathRenderer::onStencilPath(const StencilPathArgs& args) { |
| GR_AUDIT_TRAIL_AUTO_FRAME(args.fDrawContext->auditTrail(), |
| "GrStencilAndCoverPathRenderer::onStencilPath"); |
| SkASSERT(!args.fIsAA || args.fDrawContext->isStencilBufferMultisampled()); |
| SkPath path; |
| args.fShape->asPath(&path); |
| |
| SkAutoTUnref<GrPath> p(get_gr_path(fResourceProvider, path, GrStyle::SimpleFill())); |
| args.fDrawContext->drawContextPriv().stencilPath(*args.fClip, nullptr, args.fIsAA, |
| *args.fViewMatrix, p); |
| } |
| |
| bool GrStencilAndCoverPathRenderer::onDrawPath(const DrawPathArgs& args) { |
| GR_AUDIT_TRAIL_AUTO_FRAME(args.fDrawContext->auditTrail(), |
| "GrStencilAndCoverPathRenderer::onDrawPath"); |
| SkASSERT(!args.fPaint->isAntiAlias() || args.fDrawContext->isStencilBufferMultisampled()); |
| SkASSERT(!args.fShape->style().strokeRec().isHairlineStyle()); |
| |
| const SkMatrix& viewMatrix = *args.fViewMatrix; |
| |
| SkPath path; |
| args.fShape->asPath(&path); |
| |
| SkAutoTUnref<GrPath> p(get_gr_path(fResourceProvider, path, args.fShape->style())); |
| |
| if (path.isInverseFillType()) { |
| static constexpr GrUserStencilSettings kInvertedCoverPass( |
| GrUserStencilSettings::StaticInit< |
| 0x0000, |
| // We know our rect will hit pixels outside the clip and the user bits will be 0 |
| // outside the clip. So we can't just fill where the user bits are 0. We also need |
| // to check that the clip bit is set. |
| GrUserStencilTest::kEqualIfInClip, |
| 0xffff, |
| GrUserStencilOp::kKeep, |
| GrUserStencilOp::kZero, |
| 0xffff>() |
| ); |
| |
| // fake inverse with a stencil and cover |
| args.fDrawContext->drawContextPriv().stencilPath(*args.fClip, |
| &kInvertedCoverPass, |
| args.fPaint->isAntiAlias(), |
| viewMatrix, p); |
| |
| SkMatrix invert = SkMatrix::I(); |
| SkRect bounds = |
| SkRect::MakeLTRB(0, 0, |
| SkIntToScalar(args.fDrawContext->width()), |
| SkIntToScalar(args.fDrawContext->height())); |
| SkMatrix vmi; |
| // mapRect through persp matrix may not be correct |
| if (!viewMatrix.hasPerspective() && viewMatrix.invert(&vmi)) { |
| vmi.mapRect(&bounds); |
| // theoretically could set bloat = 0, instead leave it because of matrix inversion |
| // precision. |
| SkScalar bloat = viewMatrix.getMaxScale() * SK_ScalarHalf; |
| bounds.outset(bloat, bloat); |
| } else { |
| if (!viewMatrix.invert(&invert)) { |
| return false; |
| } |
| } |
| const SkMatrix& viewM = viewMatrix.hasPerspective() ? SkMatrix::I() : viewMatrix; |
| |
| SkAutoTUnref<GrDrawBatch> coverBatch( |
| GrRectBatchFactory::CreateNonAAFill(args.fPaint->getColor(), viewM, bounds, |
| nullptr, &invert)); |
| |
| { |
| GrPipelineBuilder pipelineBuilder(*args.fPaint, |
| args.fPaint->isAntiAlias() && |
| !args.fDrawContext->hasMixedSamples()); |
| pipelineBuilder.setUserStencil(&kInvertedCoverPass); |
| |
| args.fDrawContext->drawBatch(pipelineBuilder, *args.fClip, coverBatch); |
| } |
| } else { |
| static constexpr GrUserStencilSettings kCoverPass( |
| GrUserStencilSettings::StaticInit< |
| 0x0000, |
| GrUserStencilTest::kNotEqual, |
| 0xffff, |
| GrUserStencilOp::kZero, |
| GrUserStencilOp::kKeep, |
| 0xffff>() |
| ); |
| |
| SkAutoTUnref<GrDrawBatch> batch( |
| GrDrawPathBatch::Create(viewMatrix, args.fPaint->getColor(), p->getFillType(), p)); |
| |
| GrPipelineBuilder pipelineBuilder(*args.fPaint, args.fPaint->isAntiAlias()); |
| pipelineBuilder.setUserStencil(&kCoverPass); |
| if (args.fAntiAlias) { |
| SkASSERT(args.fDrawContext->isStencilBufferMultisampled()); |
| pipelineBuilder.enableState(GrPipelineBuilder::kHWAntialias_Flag); |
| } |
| |
| args.fDrawContext->drawBatch(pipelineBuilder, *args.fClip, batch); |
| } |
| |
| return true; |
| } |