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skia2/gm/convexpolyeffect.cpp
Greg Daniel 5faf474fab More bounds fixes for StrokeRect and DefaultPath when using MSAA for non-aa. 
Change-Id: Ia9c2a47675eac8f3ac1220c0e1089766aa141fc1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/245364
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
2019-10-01 19:49:15 +00:00

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/*
* 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/gm.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTypes.h"
#include "include/gpu/GrContext.h"
#include "include/private/GrRecordingContext.h"
#include "include/private/GrSharedEnums.h"
#include "include/private/GrTypesPriv.h"
#include "include/private/SkColorData.h"
#include "src/core/SkPointPriv.h"
#include "src/core/SkTLList.h"
#include "src/gpu/GrCaps.h"
#include "src/gpu/GrDefaultGeoProcFactory.h"
#include "src/gpu/GrFragmentProcessor.h"
#include "src/gpu/GrGeometryProcessor.h"
#include "src/gpu/GrMemoryPool.h"
#include "src/gpu/GrOpFlushState.h"
#include "src/gpu/GrPaint.h"
#include "src/gpu/GrProcessorAnalysis.h"
#include "src/gpu/GrProcessorSet.h"
#include "src/gpu/GrRecordingContextPriv.h"
#include "src/gpu/GrRenderTargetContext.h"
#include "src/gpu/GrRenderTargetContextPriv.h"
#include "src/gpu/GrUserStencilSettings.h"
#include "src/gpu/effects/GrConvexPolyEffect.h"
#include "src/gpu/effects/GrPorterDuffXferProcessor.h"
#include "src/gpu/ops/GrDrawOp.h"
#include "src/gpu/ops/GrMeshDrawOp.h"
#include "src/gpu/ops/GrOp.h"
#include <memory>
#include <utility>
class GrAppliedClip;
/** 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 PolyBoundsOp : public GrMeshDrawOp {
public:
DEFINE_OP_CLASS_ID
static std::unique_ptr<GrDrawOp> Make(GrRecordingContext* context,
GrPaint&& paint,
const SkRect& rect) {
GrOpMemoryPool* pool = context->priv().opMemoryPool();
return pool->allocate<PolyBoundsOp>(std::move(paint), rect);
}
const char* name() const override { return "PolyBoundsOp"; }
void visitProxies(const VisitProxyFunc& func) const override {
fProcessors.visitProxies(func);
}
FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; }
GrProcessorSet::Analysis finalize(
const GrCaps& caps, const GrAppliedClip* clip, bool hasMixedSampledCoverage,
GrClampType clampType) override {
return fProcessors.finalize(
fColor, GrProcessorAnalysisCoverage::kNone, clip, &GrUserStencilSettings::kUnused,
hasMixedSampledCoverage, caps, clampType, &fColor);
}
private:
friend class ::GrOpMemoryPool; // for ctor
PolyBoundsOp(GrPaint&& paint, const SkRect& rect)
: INHERITED(ClassID())
, fColor(paint.getColor4f())
, fProcessors(std::move(paint))
, fRect(outset(rect)) {
this->setBounds(sorted_rect(fRect), HasAABloat::kNo, IsHairline::kNo);
}
void onPrepareDraws(Target* target) override {
using namespace GrDefaultGeoProcFactory;
Color color(fColor);
sk_sp<GrGeometryProcessor> gp(GrDefaultGeoProcFactory::Make(
target->caps().shaderCaps(),
color,
Coverage::kSolid_Type,
LocalCoords::kUnused_Type,
SkMatrix::I()));
SkASSERT(gp->vertexStride() == sizeof(SkPoint));
QuadHelper helper(target, sizeof(SkPoint), 1);
SkPoint* verts = reinterpret_cast<SkPoint*>(helper.vertices());
if (!verts) {
return;
}
SkPointPriv::SetRectTriStrip(verts, fRect, sizeof(SkPoint));
helper.recordDraw(target, std::move(gp));
}
void onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) override {
flushState->executeDrawsAndUploadsForMeshDrawOp(this, chainBounds, std::move(fProcessors));
}
SkPMColor4f fColor;
GrProcessorSet fProcessors;
SkRect fRect;
typedef GrMeshDrawOp INHERITED;
};
/**
* This GM directly exercises a GrProcessor that draws convex polygons.
*/
class ConvexPolyEffect : public GpuGM {
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;
constexpr 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 = { SkScalarCos(angle), SkScalarSin(angle) };
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(GrContext* context, GrRenderTargetContext* renderTargetContext,
SkCanvas* canvas) override {
SkScalar y = 0;
constexpr 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 < kGrClipEdgeTypeCnt; ++et) {
const SkMatrix m = SkMatrix::MakeTrans(x, y);
SkPath p;
path->transform(m, &p);
GrClipEdgeType edgeType = (GrClipEdgeType) et;
std::unique_ptr<GrFragmentProcessor> fp(GrConvexPolyEffect::Make(edgeType, p));
if (!fp) {
continue;
}
GrPaint grPaint;
grPaint.setColor4f({ 0, 0, 0, 1.f });
grPaint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
grPaint.addCoverageFragmentProcessor(std::move(fp));
std::unique_ptr<GrDrawOp> op =
PolyBoundsOp::Make(context, std::move(grPaint), p.getBounds());
renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
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 < kGrClipEdgeTypeCnt; ++et) {
SkRect rect = *iter.get();
rect.offset(x, y);
GrClipEdgeType edgeType = (GrClipEdgeType) et;
std::unique_ptr<GrFragmentProcessor> fp(GrConvexPolyEffect::Make(edgeType, rect));
if (!fp) {
continue;
}
GrPaint grPaint;
grPaint.setColor4f({ 0, 0, 0, 1.f });
grPaint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
grPaint.addCoverageFragmentProcessor(std::move(fp));
std::unique_ptr<GrDrawOp> op = PolyBoundsOp::Make(context, std::move(grPaint),
rect);
renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
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;)
}
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