blob: d0e35bb53a57c885917bb7f2d301583c8df76f97 [file] [log] [blame]
/*
* Copyright 2020 Google LLC.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "src/gpu/ganesh/ops/StrokeTessellateOp.h"
#include "src/base/SkMathPriv.h"
#include "src/core/SkPathPriv.h"
#include "src/gpu/ganesh/GrAppliedClip.h"
#include "src/gpu/ganesh/GrCaps.h"
#include "src/gpu/ganesh/GrOpFlushState.h"
#include "src/gpu/ganesh/GrRecordingContextPriv.h"
#include "src/gpu/ganesh/tessellate/GrStrokeTessellationShader.h"
namespace skgpu::ganesh {
StrokeTessellateOp::StrokeTessellateOp(GrAAType aaType, const SkMatrix& viewMatrix,
const SkPath& path, const SkStrokeRec& stroke,
GrPaint&& paint)
: GrDrawOp(ClassID())
, fAAType(aaType)
, fViewMatrix(viewMatrix)
, fPathStrokeList(path, stroke, paint.getColor4f())
, fTotalCombinedVerbCnt(path.countVerbs())
, fProcessors(std::move(paint)) {
if (!this->headColor().fitsInBytes()) {
fPatchAttribs |= PatchAttribs::kWideColorIfEnabled;
}
SkRect devBounds = path.getBounds();
if (!this->headStroke().isHairlineStyle()) {
// Non-hairlines inflate in local path space (pre-transform).
float r = stroke.getInflationRadius();
devBounds.outset(r, r);
}
viewMatrix.mapRect(&devBounds, devBounds);
if (this->headStroke().isHairlineStyle()) {
// Hairlines inflate in device space (post-transform).
float r = SkStrokeRec::GetInflationRadius(stroke.getJoin(), stroke.getMiter(),
stroke.getCap(), 1);
devBounds.outset(r, r);
}
this->setBounds(devBounds, HasAABloat::kNo, IsHairline::kNo);
}
void StrokeTessellateOp::visitProxies(const GrVisitProxyFunc& func) const {
if (fFillProgram) {
fFillProgram->visitFPProxies(func);
} else if (fStencilProgram) {
fStencilProgram->visitFPProxies(func);
} else {
fProcessors.visitProxies(func);
}
}
GrProcessorSet::Analysis StrokeTessellateOp::finalize(const GrCaps& caps,
const GrAppliedClip* clip,
GrClampType clampType) {
// Make sure the finalize happens before combining. We might change fNeedsStencil here.
SkASSERT(fPathStrokeList.fNext == nullptr);
if (!caps.shaderCaps()->fInfinitySupport) {
// The GPU can't infer curve type based in infinity, so we need to send in an attrib
// explicitly stating the curve type.
fPatchAttribs |= PatchAttribs::kExplicitCurveType;
}
const GrProcessorSet::Analysis& analysis = fProcessors.finalize(
this->headColor(), GrProcessorAnalysisCoverage::kNone, clip,
&GrUserStencilSettings::kUnused, caps, clampType, &this->headColor());
fNeedsStencil = !analysis.unaffectedByDstValue();
return analysis;
}
GrOp::CombineResult StrokeTessellateOp::onCombineIfPossible(GrOp* grOp, SkArenaAlloc* alloc,
const GrCaps& caps) {
SkASSERT(grOp->classID() == this->classID());
auto* op = static_cast<StrokeTessellateOp*>(grOp);
// This must be called after finalize(). fNeedsStencil can change in finalize().
SkASSERT(fProcessors.isFinalized());
SkASSERT(op->fProcessors.isFinalized());
if (fNeedsStencil ||
op->fNeedsStencil ||
fViewMatrix != op->fViewMatrix ||
fAAType != op->fAAType ||
fProcessors != op->fProcessors ||
this->headStroke().isHairlineStyle() != op->headStroke().isHairlineStyle()) {
return CombineResult::kCannotCombine;
}
auto combinedAttribs = fPatchAttribs | op->fPatchAttribs;
if (!(combinedAttribs & PatchAttribs::kStrokeParams) &&
!tess::StrokesHaveEqualParams(this->headStroke(), op->headStroke())) {
// The paths have different stroke properties. We will need to enable dynamic stroke if we
// still decide to combine them.
if (this->headStroke().isHairlineStyle()) {
return CombineResult::kCannotCombine; // Dynamic hairlines aren't supported.
}
combinedAttribs |= PatchAttribs::kStrokeParams;
}
if (!(combinedAttribs & PatchAttribs::kColor) && this->headColor() != op->headColor()) {
// The paths have different colors. We will need to enable dynamic color if we still decide
// to combine them.
combinedAttribs |= PatchAttribs::kColor;
}
// Don't actually enable new dynamic state on ops that already have lots of verbs.
constexpr static GrTFlagsMask<PatchAttribs> kDynamicStatesMask(PatchAttribs::kStrokeParams |
PatchAttribs::kColor);
PatchAttribs neededDynamicStates = combinedAttribs & kDynamicStatesMask;
if (neededDynamicStates != PatchAttribs::kNone) {
if (!this->shouldUseDynamicStates(neededDynamicStates) ||
!op->shouldUseDynamicStates(neededDynamicStates)) {
return CombineResult::kCannotCombine;
}
}
fPatchAttribs = combinedAttribs;
// Concat the op's PathStrokeList. Since the head element is allocated inside the op, we need to
// copy it.
auto* headCopy = alloc->make<PathStrokeList>(std::move(op->fPathStrokeList));
*fPathStrokeTail = headCopy;
fPathStrokeTail = (op->fPathStrokeTail == &op->fPathStrokeList.fNext) ? &headCopy->fNext
: op->fPathStrokeTail;
fTotalCombinedVerbCnt += op->fTotalCombinedVerbCnt;
return CombineResult::kMerged;
}
// Marks every stencil value as "1".
constexpr static GrUserStencilSettings kMarkStencil(
GrUserStencilSettings::StaticInit<
0x0001,
GrUserStencilTest::kLessIfInClip, // Match kTestAndResetStencil.
0x0000, // Always fail.
GrUserStencilOp::kZero,
GrUserStencilOp::kReplace,
0xffff>());
// Passes if the stencil value is nonzero. Also resets the stencil value to zero on pass. This is
// formulated to match kMarkStencil everywhere except the ref and compare mask. This will allow us
// to use the same pipeline for both stencil and fill if dynamic stencil state is supported.
constexpr static GrUserStencilSettings kTestAndResetStencil(
GrUserStencilSettings::StaticInit<
0x0000,
GrUserStencilTest::kLessIfInClip, // i.e., "not equal to zero, if in clip".
0x0001,
GrUserStencilOp::kZero,
GrUserStencilOp::kReplace,
0xffff>());
void StrokeTessellateOp::prePrepareTessellator(GrTessellationShader::ProgramArgs&& args,
GrAppliedClip&& clip) {
SkASSERT(!fTessellator);
SkASSERT(!fFillProgram);
SkASSERT(!fStencilProgram);
// GrOp::setClippedBounds() should have been called by now.
SkASSERT(SkRect::MakeIWH(args.fWriteView.width(),
args.fWriteView.height()).contains(this->bounds()));
const GrCaps& caps = *args.fCaps;
SkArenaAlloc* arena = args.fArena;
auto* pipeline = GrTessellationShader::MakePipeline(args, fAAType, std::move(clip),
std::move(fProcessors));
fTessellator = arena->make<StrokeTessellator>(fPatchAttribs);
fTessellationShader = args.fArena->make<GrStrokeTessellationShader>(
*caps.shaderCaps(),
fPatchAttribs,
fViewMatrix,
this->headStroke(),
this->headColor());
auto fillStencil = &GrUserStencilSettings::kUnused;
if (fNeedsStencil) {
fStencilProgram = GrTessellationShader::MakeProgram(args, fTessellationShader, pipeline,
&kMarkStencil);
fillStencil = &kTestAndResetStencil;
// TODO: Currently if we have a texture barrier for a dst read it will get put in before
// both the stencil draw and the fill draw. In reality we only really need the barrier
// once to guard the reads of the color buffer in the fill from the previous writes. Maybe
// we can investigate how to remove one of these barriers but it is probably not something
// that is required a lot and thus the extra barrier shouldn't be too much of a perf hit to
// general Skia use.
}
fFillProgram = GrTessellationShader::MakeProgram(args, fTessellationShader, pipeline,
fillStencil);
}
void StrokeTessellateOp::onPrePrepare(GrRecordingContext* context,
const GrSurfaceProxyView& writeView, GrAppliedClip* clip,
const GrDstProxyView& dstProxyView,
GrXferBarrierFlags renderPassXferBarriers, GrLoadOp
colorLoadOp) {
// DMSAA is not supported on DDL.
bool usesMSAASurface = writeView.asRenderTargetProxy()->numSamples() > 1;
this->prePrepareTessellator({context->priv().recordTimeAllocator(), writeView, usesMSAASurface,
&dstProxyView, renderPassXferBarriers, colorLoadOp,
context->priv().caps()},
(clip) ? std::move(*clip) : GrAppliedClip::Disabled());
if (fStencilProgram) {
context->priv().recordProgramInfo(fStencilProgram);
}
if (fFillProgram) {
context->priv().recordProgramInfo(fFillProgram);
}
}
void StrokeTessellateOp::onPrepare(GrOpFlushState* flushState) {
if (!fTessellator) {
this->prePrepareTessellator({flushState->allocator(), flushState->writeView(),
flushState->usesMSAASurface(), &flushState->dstProxyView(),
flushState->renderPassBarriers(), flushState->colorLoadOp(),
&flushState->caps()}, flushState->detachAppliedClip());
}
SkASSERT(fTessellator);
fTessellator->prepare(flushState,
fViewMatrix,
&fPathStrokeList,
fTotalCombinedVerbCnt);
}
void StrokeTessellateOp::onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) {
if (fStencilProgram) {
flushState->bindPipelineAndScissorClip(*fStencilProgram, chainBounds);
flushState->bindTextures(fStencilProgram->geomProc(), nullptr, fStencilProgram->pipeline());
fTessellator->draw(flushState);
}
if (fFillProgram) {
flushState->bindPipelineAndScissorClip(*fFillProgram, chainBounds);
flushState->bindTextures(fFillProgram->geomProc(), nullptr, fFillProgram->pipeline());
fTessellator->draw(flushState);
}
}
} // namespace skgpu::ganesh